Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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DEVICE FOR INDUCTIVE ENERGY TRANSFER AND STATIONARY PART AND
METHOD FOR PRODUCING A STATIONARY PART
The invention relates to a device for inductive energy transmission and a
stationary part
of such a device and a method for producing a stationary part.
Electric vehicles, in particular rail-borne vehicles, and/or road vehicles can
be operated
using electric energy, which is transferred via an inductive energy transfer
to the vehicle.
Such vehicles can comprise, for example, a circuit arrangement, which is a
traction
system or part of a traction system of the vehicle. This circuit arrangement
can comprise
a receiving device for receiving an electromagnetic alternating field and for
generating
an alternating current because of electromagnetic induction. Furthermore, a
vehicle can
comprise a rectifier, which converts an alternating current into a direct
current. The
direct current can be used to charge a traction battery or operate an electric
machine of
the vehicle. In the latter case, the direct current can be converted by an
inverter back
into an alternating current. The inductive power transfer can be carried out
by using two
sets of windings, in particular three-phase windings. A first set of windings
that is
installed in or on the base (primary windings) and can be operated by a power
converter
arranged on the wayside. A second set of windings (secondary windings) is
arranged on
the vehicle. For example, the second set of windings can be arranged below the
vehicle,
in the case of a tram below one or more cars. In the case of an automobile,
the second
set of windings can be fastened on the vehicle chassis. The second set of
windings can
also be described as a pickup arrangement or receiving device.
A primary unit can comprise the primary windings and a secondary unit can
comprise
the secondary windings.
The first and the second set of windings form a high-frequency transformer to
transfer
electric energy to the vehicle. This can take place in a static state (when
the vehicle is
not moving) or in a dynamic state (when the vehicle is moving).
WO 2015/128450 Al discloses a device for inductive power transfer.
The technical problem results of providing a device for inductive energy
transfer, a
stationary part of such a device, and a method for producing such a stationary
part,
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wherein an operational reliability of such a device for inductive energy
transfer is
increased.
The solution to the technical problem results by way of the subjects having
the features
of claims 1, 10, and 11. Further advantageous designs of the invention result
from the
dependent claims.
A stationary part of a device for inductive energy transfer is proposed. The
device for
inductive energy transfer can also be referred to as an inductive charging
pad. The
device for inductive energy transfer can be or form part of a primary unit of
a system for
inductive energy transfer. The device can comprise the stationary part and a
movable
part in this case. The movable part can comprise a primary winding structure.
The
primary winding structure can generate an electromagnetic alternating field
when an
operating (alternating) current is applied to the primary winding structure
and/or the
primary winding structure is supplied with the operating current.
The movable part can be moved back and forth between a retracted and an
extended
state. The device can comprise for this purpose at least one means for moving
the
movable part, in particular at least one actuator. In the meaning of this
invention, the
term "means for movement" can refer to an entirety of components or elements
by
which a movement of the movable part can be generated. Therefore, the means
for
movement can comprise the actuator and/or a lifting mechanism or a lifting
means.
Furthermore, the term can also comprise coupling means for mechanical coupling
between the actuator and the lifting mechanism or lifting means and/or at
least one
guide means for movement guiding of the movable part.
The movable part can be moved at least along a first direction, in particular
by the
means for movement. The first direction can be oriented in parallel to a main
propagation direction of the electromagnetic field, which is generated by the
primary
winding structure. The main propagation direction can be oriented from the
primary
winding structure to a secondary winding structure if it is arranged above the
primary
winding structure to receive the generated electromagnetic field.
In particular, the first direction can be oriented orthogonally to a base
surface of the
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device for inductive energy transfer and/or to a surface of the base on which
the device
is installed. The first direction can be oriented away from the base surface
in this case.
In the meaning of this invention, the first direction can also be referred to
as the vertical
direction. Direction-dependent terms such as "upper", "lower", "above",
"below", "lowest",
"highest", "lower" can relate to this vertical direction hereafter.
In the retracted state, the movable part can be positioned in a retracted
position, in
particular with respect to the first direction, for example, in a lowest
vertical position. The
movable part can accordingly be positioned in an extended state at an extended
position, in particular at a highest vertical position. In the retracted
state, at least a part
of an upper side of the movable part can be arranged in the same plane as an
upper
side of the stationary part or a part thereof.
The device for inductive energy transfer, in particular the stationary part,
can comprise
or form a fastening section. It can be formed by at least a part of a base
part of the
stationary part. The fastening section can be used for fastening the
stationary part on a
holding structure, in particular on a surface of a road or on a wall, for
example, a garage
wall.
The stationary part thus comprises a base part. In the installed state of the
stationary
part, the base part is fastened on the holding structure.
Furthermore, the stationary part comprises a folded bellows, which is fastened
on the
base part. The folded bellows can also be fastened in this case on the movable
part of
the device. The folded bellows encompasses an inner volume, which is enclosed
by the
folded bellows, the stationary part, and the movable part. For example, the
above-
explained means for movement, in particular a lifting means and/or guiding
means, can
be arranged in this inner volume. The at least one actuator can also be
arranged in the
inner volume. Upon a movement into the extended state, the folded bellows is
unfolded.
Upon a movement from the extended state into the retracted state, the folded
bellows is
folded. The folded bellows is used to protect the components arranged in the
inner
volume, in particular from liquids such as water and also from dirt.
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Furthermore, the stationary part comprises at least one passage opening.
According to
the invention, at least one passage opening is arranged in a region of the
base part
encompassed by the folded bellows or in a region outside the region of the
base part
encompassed by the folded bellows. The region outside the region encompassed
by the
folded bellows can also be referred to as an outer region.
Furthermore, a passage opening or at least a part of the passage opening is
arranged in
a base surface of the base part and/or extends through the base surface. In
other
words, the base surface can comprise the passage opening or at least a part
thereof. In
this case, in particular a central axis of symmetry of the passage opening can
be
oriented in parallel to the above-explained vertical direction. In particular,
the base part
can comprise a base surface or multiple base surface sections. The base
surface can
be oriented orthogonally to the vertical direction in one base surface
section. Liquid can
thus drain through the passage opening from an upper side to a lower side of
the base
part.
A movement of the liquid can take place in this case at least partially
because of an
acting weight force. Therefore, it advantageously results due to such an
orientation of
the passage opening that liquid exits or drains simply and reliably from the
inner or outer
region of the base part.
The passage opening or the duct formed by the passage opening can in
particular
comprise a first end section, which is arranged on an upper side of the base
part and/or
is open toward the upper side. Fluid can enter the passage opening from the
upper side
through this first end section. The upper side can refer to the side of the
base part on
which the folded bellows is fastened. Furthermore, the passage opening or the
duct
formed by the passage opening can comprise a further end section, which is
arranged
on a lower side of the base part and/or is open toward the lower side. Fluid
can exit from
the passage opening toward the lower side through this further end section.
The lower
side can refer in this case to the side of the base part opposite to the upper
side.
The following statements can refer to the following reference coordinate
system. The
coordinate system can be defined by a longitudinal direction (x direction), a
transverse
direction (y direction), and the above-explained vertical direction. The
longitudinal and
transverse directions can span a plane which is oriented in parallel or
essentially in
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parallel to a fastening surface of the holding structure, in particular the
base surface, on
which the device, in particular the stationary part, is installed. The plane
can also be
perpendicular to the above-explained first direction (vertical direction). The
longitudinal,
transverse, and vertical directions can each be oriented orthogonally in
relation to one
another.
If the stationary part is arranged on a surface of a road, the vertical
direction can thus be
oriented in particular in parallel to a gravitation direction.
It is furthermore possible that the primary winding structure extends along a
direction
which is oriented in parallel to the longitudinal direction. For example, the
primary
winding structure, in particular a phase line of the primary winding
structure, can
comprise multiple sub-windings, which are arranged in succession along the
extension
direction. It is also possible that the primary winding structure comprises
three phase
lines, wherein each phase line comprises multiple sub-windings, which each
extend
along the extension direction.
Edges of the stationary part oriented in parallel to the longitudinal
direction or essentially
in parallel thereto can also be referred to as a longitudinal edge. Edges
oriented in
parallel to the transverse direction or essentially in parallel thereto can
also be referred
to as the transverse edge or end face.
It is possible that the stationary part comprises a housing section and a
receptacle
section for accommodating the movable part at least in the retracted state.
For example,
electrical or electronic components, for example, components of an inverter,
can be
arranged in the stationary part.
The folded bellows and further elements, in particular the movable part in the
retracted
state, can be arranged in the receptacle section. In the housing section, the
stationary
part can comprise or form a housing, which protects the components arranged
therein,
in particular from dirt and water. Of course, the stationary part can comprise
connecting
devices for connecting external supply means, for example, means for energy
supply or
coolant supply.
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A sub-winding can refer in this case to a preferably complete conductor loop,
which
encloses a predetermined area. The conductor loop can comprise or form one or
more
windings. Adjacent to one another can mean that central axes of symmetry of
the sub-
windings arranged adjacent to one another along the extension direction are
spaced
apart with a predetermined spacing from one another along a straight line,
which is
oriented in parallel to the extension direction.
Sub-windings can in this case comprise arbitrary geometric shapes, but
preferably a
rectangular shape or a circular shape.
Due to the passage openings in the region encompassed by the folded bellows,
which
can also be referred to as an inner region, it advantageously results that a
liquid or fluid,
in particular water, which collects in the inner region can drain off, in
particular through
the passage opening. An operational reliability of a device for inductive
energy transfer
having such a stationary part is increased in this way, since, for example,
component
elements arranged in the inner region rust less or a functionality of an
electrical
component arranged there, for example, the actuator, is not negatively
affected by
water.
The passage openings arranged in the outer region advantageously enable liquid
dripping or draining from the folded bellows, for example, spray water, to
drain off
reliably and rapidly from or out of the stationary part. In particular, the
water on the
folded bellows can flow down into or onto a support section of the stationary
part for the
folded bellows, wherein the liquid can then drain off from the stationary part
through the
passage openings in the outer region.
In this way, the risk is reduced that liquid, in particular water, can
penetrate from the
outer region into the inner region and can endanger a functionality of
components there.
In a further embodiment, the base part comprises or forms a wall section
protruding
from a base surface of the base part. For example, various base surface
sections can
be delimited from one another by such a wall section. For example, the above-
explained
outer region can comprise a cooling duct section, which is separated by a wall
section
from the above-explained support section for the folded bellows. Furthermore,
the
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support section for the folded bellows can be separated by a further wall
section from
one further or multiple further base surface sections in the inner region.
It is possible that the wall section comprises an inner volume open to the
bottom in the
vertical direction. In other words, the wall section thus comprises an inner
volume which
is open on one side, in particular to the bottom. In this case, the passage
opening can
be arranged in the wall section, in particular in a side wall section of the
wall section. A
normal vector of the side wall section can comprise a directional component
which is
oriented in parallel to the above-explained longitudinal and/or transverse
direction.
It is possible that the wall section comprises a part of the passage opening,
wherein the
remaining part of the passage opening is arranged in the base part or the base
part
forms the remaining part of the passage opening.
It is possible, for example, that the above-explained first end section of the
passage
opening is arranged in the wall section, in particular in the side wall
section. In this case,
the first end section can be arranged in particular on a lower end section of
the wall
section or side wall section. This lower end section can refer to a section
which abuts an
upper side surface of the base part or adjoins it.
In particular, a central axis of symmetry of the passage opening can thus not
be oriented
in parallel to the above-explained vertical direction. Rather, the central
axis of symmetry
can comprise at least one directional component which is oriented in parallel
to the
above-explained longitudinal and/or transverse direction. It is possible in
this case that
the central axis of symmetry does not have a directional component which is
oriented in
parallel to the vertical direction. However, this is not required. It is also
conceivable that
the central axis of symmetry comprises a directional component which is
oriented in
parallel to the vertical direction.
It is furthermore conceivable that an orientation of the central axis of
symmetry of the
passage opening or the duct formed by the passage opening changes along a
course.
For example, an orientation of the central axis of symmetry in the first end
section of the
passage opening can be different from the orientation in the further end
section of the
passage opening. Thus, for example, a directional vector of the central axis
of symmetry
in the first end section can comprise a directional component which is
oriented in
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parallel to the above-explained longitudinal and/or transverse direction
and/or cannot
comprise a directional component which is oriented in parallel to the vertical
direction.
Furthermore, for example, a directional vector of the central axis of symmetry
in the
further end section can comprise a directional component which is oriented in
parallel to
the vertical direction and/or cannot comprise a directional component which is
oriented
in parallel to the above-explained longitudinal and/or transverse direction.
The passage opening can connect the inner volume of the wall section to an
upper side
of the base part. In this case, it is thus possible that liquid enters through
the passage
opening in the wall section from an upper side of the base part into the inner
volume of
the wall section and exits downward out of the inner volume through the
opening of the
wall section.
A reliable drainage of liquid advantageously results in this way, since
passage openings
arranged in the wall section cannot be closed easily by dirt, for example, by
leaves,
rocks, or further particles, whereby the liquid drainage would be reduced or
prevented.
In a further embodiment, the stationary part comprises a support section for a
stationary-part-side end section of the folded bellows or forms it. In this
support section,
the folded bellows can be fastened on the stationary part and/or rest on the
stationary
part, at least in the folded state. Furthermore, the folded bellows can also
comprise a
further end section for fastening on the movable part.
Furthermore, the at least one passage opening is arranged outside the region
of the
base part encompassed by the folded bellows and in an edge section of the
support
section or in a section of the base part adjacent to the support section. In
particular, the
passage opening can be arranged in such a way that liquid draining or dripping
off of the
folded bellows can drain off as directly as possible through the passage
opening from
the upper side of the base part.
In particular, it is possible that in a common projection plane, the passage
opening is
arranged directly adjacent to the folded bellows, in particular in the folded
state, wherein
the common projection surface can be oriented, for example, orthogonally to
the vertical
direction. It is also possible that in this common projection plane, a minimal
spacing of
an edge of the passage opening from the folded bellows along the longitudinal
direction
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and/or along the transverse direction is not greater than a predetermined
amount for
example, not greater than 5 mm.
In other words, it is possible that the passage openings are arranged as much
as
possible directly adjacent to the folded bellows in the outer region to
discharge water
draining off from the folded bellows as directly as possible from the
stationary part.
In a further embodiment, the base part comprises at least one means for fluid
guiding of
a fluid, preferably water, toward the at least one passage opening or forms
this means.
Via the means for fluid guiding, fluid can be conducted out of the inner
and/or outer
region toward the passage opening, in particular out of regions or base
surface sections
of the base part which are adjacent to the passage opening. The means for
fluid guiding
can preferably be formed in such a way that the weight force acting on the
fluid at least
partially causes a fluid flow toward the passage opening.
Reliable drainage of fluid on the stationary part and thus also increased
operational
reliability advantageously result in this way.
In a further embodiment, the means for fluid guiding is formed as a duct or as
a groove.
A simple formation of the means for fluid guiding advantageously results in
this way, in
particular in the case of a production of the stationary part by a casting
method.
In a further embodiment, at least a part of a section of the base part
enclosing the
passage opening is beveled toward the passage opening. The bevel can be formed
in
this case in particular in such a way that fluid can flow along the beveled
surface toward
the passage opening because of the weight force. The simplest possible
formation of a
means for fluid guiding and/or for promoting or ensuring fluid drainage from
the
stationary part advantageously results in this way, and thus in turn increased
operational
reliability.
In a further embodiment, the base part comprises at least two passage
openings,
wherein the passage openings have different geometric shapes from one another.
The fact that passage openings have different geometric shapes from one
another can
mean in particular that a geometric basic shape of a first passage opening is
different
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from a geometric basic shape of a further passage opening. For example, the
first
passage opening can comprise a circular shape as the basic shape, while the
second
passage opening can comprise an oblong hole shape. A basic shape can be in
particular a circular shape, an oblong hole shape, a rectangle shape, a
triangle shape,
an oval shape, a polygon shape, or another shape.
However, the fact that passage openings have different geometric shapes from
one
another can also mean that the passage openings do have an identical geometric
basic
shape, for example, an oblong hole shape or a rectangle shape, but different
orientations from one another, in particular in the reference coordinate
system. In
particular, central longitudinal axes of the passage openings can have
different
orientations from one another.
For example, a geometric shape and/or orientation of a passage opening which
is
arranged in or on a first longitudinal edge of the base part or the receptacle
section of
the base part can be different from a geometric shape of a passage opening
which is
arranged on an opposing longitudinal edge or on a transverse edge.
A production of the stationary part, in particular by a casting method, can be
simplified
by the geometric shapes different from one another. In particular, the
geometric shape
of the individual passage openings can be selected in such a way that the
production of
the stationary part as a casting is performed having a reliable material
distribution of the
casting material into a casting mold of the casting. The casting mold
comprises sections
or elements in this case which define the location and shape of the passage
openings,
wherein the casting material flows around the sections or elements.
In a further embodiment, geometric shapes of passage openings arranged along a
predetermined direction are selected in such a way that a pressure resistance
associated with the passage openings increases along the predetermined
direction.
The pressure resistance associated with a passage opening is in this case a
pressure
resistance of a body around which flow occurs against a fluid flowing along
the
predetermined direction, in particular of the casting material flowing along
the
predetermined direction, wherein an outer surface of the body around which
flow occurs
has a geometric shape corresponding to the passage opening. If the geometric
shape of
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the passage opening is designed, for example, as a circle having a
predetermined
diameter, the body around which flow occurs can thus be a cylinder having
circular
cross section and the same diameter.
The predetermined direction can be in particular a casting direction. The
predetermined
direction can be, for example, oriented in parallel to the longitudinal
direction or in
parallel to the transverse direction. In this case, material is poured into a
casting mold,
which then flows along the casting direction and fills the casting mold.
The fact that the passage openings are arranged along the predetermined
direction
does not necessarily mean that they are arranged along a straight line which
is oriented
in parallel to the predetermined direction.
A simple and reliable production of the stationary part advantageously results
in this
way, in particular by a casting method. In particular, it is ensured that a
material
distribution during the casting is not prevented or obstructed by the sections
or elements
of the casting mold which define the location and geometric shape of the
passage
openings in the stationary part.
In a further embodiment, a passage opening which is arranged in or adjacent to
a first
subsection of the support section of the base part has a geometric shape which
is
different from a geometric shape of a passage opening which is arranged in or
adjacent
to a further subsection of the support section. In this way, the passage
opening can be
arranged in particular in an edge section of the subsection in each case.
Alternatively or additionally, a passage opening which is arranged in a first
edge section
of the stationary part has a geometric shape which is different from a
geometric shape
of a passage opening which is arranged in a further edge section of the
stationary part.
The first subsection of the support section can be arranged in this case along
the
predetermined direction, in particular a casting direction, in front of the
further
subsection of the support section. Accordingly, the first subsection can be
arranged
along the predetermined direction in front of the further edge section of the
stationary
part. For example, the first subsection can be arranged adjacent to a first
longitudinal
edge or a first transverse edge of the stationary part and/or of the
receptacle section of
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the stationary part, wherein the further subsection can be arranged adjacent
to an
opposing longitudinal edge or an opposing transverse edge of the stationary
part and/or
the receptacle section of the stationary part.
The first edge section can also correspond to a first longitudinal edge or
first transverse
edge, wherein the further edge section corresponds to an opposing longitudinal
edge or
opposing transverse edge.
For example, passage openings, which are arranged in or adjacent to a first
subsection
of the support section of the base part or in the first edge section, can have
a circular
shape.
Passage openings, which are arranged in or adjacent to a further subsection or
in the
further edge section, can have an oblong hole shape. An oblong hole can refer
in this
case to an oblong passage opening, the narrow sides of which are terminated by
semicircles.
In this case, a longitudinal axis of the oblong hole can be oriented in
parallel to the
predetermined direction, but preferably orthogonally to the predetermined
direction.
It is possible that passage openings are arranged both on the longitudinal
edges and
also on the transverse edges of the stationary part and/or the support section
and/or in
sections which extend parallel to these edges. In this case, the passage
openings
arranged in/on the transverse edges can also have geometric shapes which are
different from the geometric shapes of passage openings which are arranged
in/on a
first longitudinal edge. The passage openings arranged in/on the transverse
edges can
also have geometric shapes which are different from the geometric shapes of
the
passage openings which are arranged in/on an opposing longitudinal edge.
An improved adaptation to production conditions, in particular to a casting
method, thus
advantageously results.
Furthermore, a device for inductive energy transfer is proposed having a
stationary part
according to one of the embodiments disclosed in this disclosure. The device
for
inductive energy transfer comprises in this case a movable part, wherein the
folded
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bellows is fastened on the movable part. A lever mechanism, which also
connects the
stationary part to the movable part, can be arranged in the inner volume
encompassed
by the folded bellows. Furthermore, electrical connecting means, for example,
cables,
can be arranged in the inner volume, by which elements of the movable part are
connected to elements of the stationary part.
Furthermore, a method is proposed for producing a stationary part according to
an
embodiment disclosed in this disclosure. The method comprises in this case all
production steps for producing such a stationary part. In particular, a base
part can be
provided. The base part can be provided in particular by a casting method. In
this case,
the casting material can be poured into a casting mold, wherein the base part
has a
desired shape after curing of the casting material. The casting mold can be
formed in
this case in such a way that the stationary part (after the curing) comprises
at least one
passage opening, wherein the at least one passage opening is arranged in a
region of
the base part encompassed by the folded bellows and/or in a region outside the
region
of the base part encompassed by the folded bellows.
Furthermore, a folded bellows is provided and fastened on the base part. The
folded
bellows can in particular be fastened with a stationary-part-side end section
on the
stationary part, in particular on a receptacle section of the stationary part.
Furthermore, at least one passage opening of the stationary part is provided.
This can
take place in the scope of the above-explained casting method. Of course,
however, it is
also possible that the passage opening is introduced into the base part after
provision of
the base part, for example, by drilling, stamping, or by a further method for
introducing a
passage opening.
Furthermore, a wall section, a support section for the stationary-part-side
end section of
the folded bellows, a means for fluid guiding, in particular a duct or a
groove, and/or a
bevel toward the passage opening can be provided subsequently or in the scope
of the
explained casting method.
Furthermore, at least two passage openings can be provided which have
geometric
shapes different from one another. This can also be ensured by the above-
explained
casting method.
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In particular, casting material can be poured along a predetermined casting
direction
into a casting mold, wherein the casting mold comprises sections or elements
along the
casting direction for defining the location and geometric shape of the passage
openings,
wherein a pressure resistance of these sections or elements increases along
the
predetermined direction.
Furthermore, a method is also described for producing a device for inductive
energy
transfer having a stationary part and a movable part. In this case, the
stationary part can
be provided according to one of the methods for production described in this
disclosure.
Furthermore, a movable part can be provided and can be connected to the
stationary
part. Furthermore, the folded bellows can be fastened on the movable part.
The invention will be explained in greater detail on the basis of exemplary
embodiments.
In the figures:
Figure 1 shows a schematic top view of a stationary part according to an
embodiment according to the invention and
Figure 2 shows a schematic side view of a device according to the invention
for
inductive energy transfer.
Figure 1 shows a schematic top view of a stationary part 1 of a device 2 for
inductive
energy transfer. The stationary part 1 comprises a base part 3. Furthermore,
the
stationary part 1 comprises a housing section 4 and a receptacle section 5 for
accommodating a movable part 6 (see Figure 2). Furthermore, the stationary
part 1
comprises a folded bellows 7 (see Figure 2), which is fastened on the base
part 3. The
folded bellows 7 is identified in the top view by a shaded region.
Furthermore, a
longitudinal direction x and a transverse direction y of a reference
coordinate system are
shown. The longitudinal direction x and the transverse direction y are
oriented
perpendicularly to one another in this case.
Furthermore, a region 8 encompassed by the folded bellows 7, which can also be
referred to as an inner region, and a region 9 outside the region encompassed
by the
folded bellows 7, which can also be referred to as an outer region, are shown.
The
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regions 8, 9 can be subregions of the receptacle section 5 of the stationary
part 1 in this
case.
It is furthermore shown that the stationary part 1, in particular the
receptacle section 5,
comprises passage openings 10 in the base part 3, wherein the passage openings
10
are arranged in the inner region 8. Furthermore, further passage openings 11
in the
base part 3 of the stationary part 1 are shown, in particular of the
receptacle section 5,
wherein these passage openings 11 are arranged in the outer region 9.
Furthermore, a wall section 12 is shown, wherein the wall section 12 is
arranged in the
outer region 9. A receptacle section 13 of the base part 3 for the folded
bellows 7 is
separated from a cooling duct section 14 by the wall section 12, wherein the
cooling
duct section 14 is arranged in the outer region 9. The wall section 12 can be
arranged
on a foundation plate of the base part or can be formed thereby.
It is shown that the passage openings 11 are arranged in the outer region 9 in
the
support section 13 and/or in a region of the base part 3 which is adjacent to
the support
section 13.
Furthermore, a means 15 for fluid guiding formed as a groove is schematically
shown.
By means of the groove 15, fluid, in particular water, can be transported from
adjacent
regions of the passage openings 11 toward the respective passage opening 11.
Furthermore, it is shown that passage openings 11 a of a first set of passage
openings
11 are formed to be circular. Passage openings 11b, 11c of a second and a
third set of
passage openings 11 are formed as oblong holes. The passage openings 11a, 11
b, 11c
of the first, second, and third set of passage openings 11 are arranged in the
outer
region. Passage openings 10 of a fourth set of passage openings are formed to
be
circular and are arranged in the inner region 8.
Furthermore, it is shown that orientations of the longitudinal axes of the
passage
openings 11 b, 11c formed as oblong holes are different from one another. In
particular,
a central longitudinal axis of passage openings llb of the second set of
passage
openings llb is oriented in parallel to the transverse direction y, while a
central
Date Recue/Date Received 2020-05-14
CA 03082731 2020-05-14
longitudinal axis of passage openings 11c of the third set of passage openings
11c is
oriented in parallel to the longitudinal direction x.
The passage openings 10, 11, 11a, 11 b, 11c and/or ducts formed by these
passage
openings extend through the base part 3 and/or a foundation plate of the base
part 3, in
particular from an upper side to a lower side.
The stationary part 1 can be produced as a cast part. In this case, a casting
mold can be
provided in such a way that casting material flows into the casting mold from
a first
longitudinal edge 16a toward a second longitudinal edge 16b of the stationary
part Ito
be produced. In this case, the casting material firstly flows against the
sections of the
casting mold which form the location and formation of the passage openings 11
a of the
first set of passage openings 11, wherein these passage openings lla are
arranged in
the region of the first longitudinal edge 16a. Furthermore, the casting
material flows
against sections of the casting mold which define the location and formation
of the
passage openings llb of the second set of passage openings 11, wherein these
are
arranged in the region of the transverse edges. Thirdly and lastly, the
casting material
flows against the passage openings 11c of the third set of passage openings
11, which
are arranged in the second longitudinal edge 16b, wherein the second
longitudinal edge
16b is arranged in a flow direction behind the first longitudinal edge 16a.
The casting
material thus flows along a flow direction which is oriented in parallel to
the transverse
direction y.
A pressure resistance of the sections which define the location and formation
of the
passage openings lla of the first set, the passage openings llb of the second
set, and
the passage openings 10 of the fourth set is less in this case than a pressure
resistance
of the sections which define the location and formation of the passage
openings 11c of
the third set of passage openings 11.
Furthermore, the pressure resistances of the sections which define the
location and
formation of the passage openings lla of the first set and the passage
openings llb of
the second set and also the passage openings 10 of the fourth set can also
differ from
one another.
16
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CA 03082731 2020-05-14
Furthermore, a beveled region 17 is shown, which is arranged around a passage
opening 10 in the inner region. In this case, the beveled region 17 is formed
in such a
way that it is beveled toward the passage opening 10. Fluid, in particular
water, can flow
toward the passage opening 10 thanks to the beveled surface.
Figure 2 shows a schematic side view of a device 2 according to the invention
for
inductive energy transfer. In this case, the stationary part 1 having the
housing section 4
and the receptacle section 5 is shown. Furthermore, the base part 3, which is
part of the
stationary part 1, is shown. Furthermore, a movable part 6 is shown. The
movable part 6
can be moved by means of means (not shown) for movement in an opposite to a
vertical
direction z, wherein the vertical direction z is oriented perpendicular to the
longitudinal
direction x and to the transverse direction y (see Figure 1).
The movable part 6 is shown in the extended state. In the retracted state, the
movable
part 6 rests on a surface of the base part 3, in particular in the receptacle
section 5.
The passage openings 11, 11a, which are arranged in the region of the first
longitudinal
edge 16a in the outer region 9, are shown. Further passage openings 10, 11 b,
11c,
which are shown in Figure 1, for example, are not shown in this case.
Furthermore, the
wall section 12, which extends around the support section 13 for the folded
bellows 7, is
shown. It is shown that passage openings 18, by which an inner volume 19
enclosed by
the wall section 12 is connected to the support section 13, are arranged in a
side wall
section of the wall section 12. Passage openings 18 extend through the side
wall
section and through the base part 3 or the foundation plate of the base part
3, in
particular from an upper side to a lower side. It is furthermore shown that
the inner
volume 19 of the wall section 12 is open toward a lower side of the base part
1. In this
way, water can drain off from the support section 13 through the side walls of
the wall
section 12 to the lower side. It is furthermore shown that the lower side is
fastened on a
holding structure 19, for example, a base or a wall. In other words, Figure 2
shows that
a part of the duct formed by the passage opening 18 can be arranged in a side
wall
section, wherein a further, in particular remaining part is arranged in the
base part 3 or
in the foundation plate of the base part 3.
Figure 3 shows a schematic flow chart of a method for producing a stationary
part 1. In
a first step Sl, a base part is provided. The base part can be provided by a
casting
17
Date Recue/Date Received 2020-05-14
CA 03082731 2020-05-14
method, as explained above. Furthermore, at least one passage opening 10, 11
of the
stationary part 1 is provided. This can be performed in the scope of the
explained
casting method.
In a second step S2, a folded bellows 7 is provided and fastened on the base
part 3.
The folded bellows 7 can in particular be fastened with a stationary-part-side
end
section on the stationary part 1, in particular on a receptacle section of the
stationary
part.
Furthermore, at least two passage openings 10, 11a, 11b, 11c can be provided,
which
have geometric shapes different from one another. These can also be ensured by
the
above-explained casting method. In particular, casting material can be poured
along a
predetermined casting direction into a casting mold, wherein the casting mold
comprises
sections or elements along the casting direction for defining the location and
geometric
shape of the passage openings, wherein a pressure resistance of these sections
or
elements increases along the predetermined direction.
18
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List of reference numerals
1 stationary part
2 device for inductive energy transfer
3 base part
4 inner region
outer region
6 movable part
7 folded bellows
8 inner region
9 outer region
passage opening in the inner region
11 passage opening in the outer region
11 a passage opening of a first set of passage openings
11 b passage opening of a second set of passage openings
11c passage opening of a third set of passage openings
12 wall section
13 support section
14 cooling duct section
groove
16a first longitudinal edge
16 longitudinal edge opposite to the first longitudinal edge
17 beveled region
18 passage opening
19 holding structure
19
Date Recue/Date Received 2020-05-14
