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Sommaire du brevet 2280068 

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L'apparition de différences dans le texte et l'image des Revendications et de l'Abrégé dépend du moment auquel le document est publié. Les textes des Revendications et de l'Abrégé sont affichés :

  • lorsque la demande peut être examinée par le public;
  • lorsque le brevet est émis (délivrance).
(12) Demande de brevet: (11) CA 2280068
(54) Titre français: DISPOSITIF DE VENTILATION DE SYSTEME D'ALIMENTATION ELECTRONIQUE
(54) Titre anglais: VENTILATION ARRANGEMENT FOR POWER SYSTEM
Statut: Réputée abandonnée et au-delà du délai pour le rétablissement - en attente de la réponse à l’avis de communication rejetée
Données bibliographiques
(51) Classification internationale des brevets (CIB):
  • H05K 07/20 (2006.01)
(72) Inventeurs :
  • ATANUS, RONALD D. (Etats-Unis d'Amérique)
  • MIKOSZ, RICHARD P. (Etats-Unis d'Amérique)
  • O'LEARY, RAYMOND P. (Etats-Unis d'Amérique)
(73) Titulaires :
  • S & C ELECTRIC COMPANY
(71) Demandeurs :
  • S & C ELECTRIC COMPANY (Etats-Unis d'Amérique)
(74) Agent: OSLER, HOSKIN & HARCOURT LLP
(74) Co-agent:
(45) Délivré:
(22) Date de dépôt: 1999-08-11
(41) Mise à la disponibilité du public: 2000-06-22
Licence disponible: S.O.
Cédé au domaine public: S.O.
(25) Langue des documents déposés: Anglais

Traité de coopération en matière de brevets (PCT): Non

(30) Données de priorité de la demande:
Numéro de la demande Pays / territoire Date
09/219,098 (Etats-Unis d'Amérique) 1998-12-22

Abrégés

Abrégé anglais


A ventilation arrangement is provided for power electronic equipment including
a
plurality of power electronics assemblies. The ventilation arrangement
includes a common
source of directed air flow, spaced apart insulating ducts for providing air
flow from the
common source, and arrangements connected to each of the spaced apart
insulating ducts for
distributing and directing the air flow to each of the power electronics
assemblies In a
preferred embodiment, the insulating ducts are fabricated from extremely low
leakage material
that provides extremely low tracking characteristics.

Revendications

Note : Les revendications sont présentées dans la langue officielle dans laquelle elles ont été soumises.


The embodiments of the invention in which an exclusive property or privilege
is claimed are
defined as follows:
1. In an arrangement for directing air to cool power electronic devices in a
power system,
the arrangement comprising:
first power electronic means having voltage applied thereacross and including
a
plurality of heat dissipation means extending along a first direction and
defining a first
predetermined array of passages therethrough along said first direction;
second means for providing air flow; and
third means fabricated from insulating material, receiving said air flow and
directing
said air flow through said first predetermined array of passages in said first
power electronic
means in said first direction, said second means comprising an insulating duct
having low
electrical leakage and tracking properties.
2. The arrangement of claim 1 wherein said first power electronic means
further
includes a second array of openings extending along said first direction, said
third means
including means for blocking said second array of openings.
3. The arrangement of claim 1 further comprising a plurality of said first
power
electronic means and a respective plurality of said third means, said second
means comprising
an insulating duct for each of said third means.
4. The arrangement of claim 3 wherein said plurality of said first power
electronic
means are energized to operate as different phases of a multi-phase AC system.
5. The arrangement of claim 1 wherein said second means further comprises
means
for providing predetermined air flow to said insulating duct.
6. The arrangement of claim 1 wherein said insulating duct is fabricated from
a
polymeric material.
7. The arrangement of claim 1 wherein said insulating duct is fabricated from
a
material including acyrlic.
-6-

8. The arrangement of claim 1 wherein said insulating duct is a tubular.
9. The arrangement of claim 1 wherein said first power electronic means
comprises
a stacked array of power electronic modules including power electronic
devices.
10. The arrangement of claim 9 wherein each of said power electronic devices
is
arranged intermediate one of said plurality of heat dissipation means.
11. The arrangement of claim 1 wherein said third means generally has the
overall
shape of a parallelepiped and includes means for defining predetermined
openings for directing
air flow.
12. The arrangement of claim 11 wherein said third means further comprises a
generally planar equalization baffle having a predetermined array of openings.
13. The arrangement of claim 11 wherein said third means is fabricated from
GPO-3
fiberglass material.
14. A system for delivering directed air flow to a plurality of power
electronic
assemblies energized at predetermined voltages comprising:
air-flow delivery means for providing air flow;
spaced apart insulating ducts communicating with said air-flow delivery means
for providing; and
distributing/directing means fabricated from insulating material, connected to
receive air flow from each of said insulating ducts and providing directed air
to each of
the power electronics assemblies.
-7-

Description

Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.


CA 02280068 1999-08-11
SC-5296-C
VENTILATION ARRANGEMENT FOR POWER SYSTEM
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates generally to ventilation arrangements and more
particularly to a ventilation arrangement for a power system.
Description of the Related Art
Various cooling and ventilating arrangements are known for removing heat
dissipation
from electronic devices. For example, the following U.S. Patent Nos.
illustrate arrangements
to direct ventilating air flow: 3,641,419; 4,674,004; 5,136,464; 5,646,825;
and 5,800,258. In
the aforementioned 3,641,419, power supply modules of an AC to DC converter
include side
panels, top panels and fans to provide a horizontal airflow pattern through
each individual
module in an array. The arrangement in the aforementioned 4,674,004 provides a
ducting
structure to individual printed circuit cards in an array of parallel cards,
with each duct
including a plurality of spaced apertures to direct individual streams of
cooling air to respective
areas of the printed circuit cards. In the aforementioned 5,136,464, a housing
structure houses
a two or more storied configuration of electrical components and a confluence-
preventing
arrangement prevents air exhausted from a lower component section and air
introduced into an
upper component section from being combined together. The confluence-
preventing
arrangement includes a support section that supports the electronic components
in the upper
component section and a confluence preventing section below the support
section. In the
aforementioned 5,646,825, a cooling device for a switch cabinet includes first
and second heat
exchangers in respective first and second chambers. Both heat exchangers are
supplied from a
common compressor. A ventilation system for a cabinet in the aforementioned
5,800,258
includes multiple fan units that are disposed at mid-height in the cabinet
between upper and
lower stacked component arrangements, the fans being arranged in pairs with
their respective
air intake direction facing toward each other. The spaced-apart fan pairs form
a horizontal air
duct that extends to the exterior of the cabinet.
While these arrangements may generally be useful for their intended purposes,
they do
not relate to the field of medium voltage power electronic devices for such
applications as

CA 02280068 1999-08-11
SC-5296-C
high-speed source transfer where power electronic devices such as SCR's or
thyristors generate
large volumes of heat and portions of the power electronic assemblies are at
diverse medium
voltages during operation.
SUMMARY OF THE INVENTION
Accordingly, it is a principal object of the present invention to provide a
ventilation
arrangement for a medium-voltage power electronic device that provides
desirable ventilation
control while also providing insulation to the medium voltage components.
It is another object of the present invention to provide directed air flow to
power
electronic assemblies of power electronic modules that each have different
medium voltages
applied thereacross.
These and other objects of the present invention are efficiently achieved by
the
provision of a ventilation arrangement for power electronic equipment
including a plurality of
power electronics assemblies. The ventilation arrangement includes a common
source of
directed air flow, spaced apart insulating ducts for providing air flow from
the common
source, and arrangements connected to each of the spaced apart insulating
ducts for distributing
and directing the air flow to each of the power electronics assemblies In a
preferred
embodiment, the insulating ducts are fabricated from extremely low leakage
material that
provides extremely low tracking characteristics.
BRIEF DESCRIPTION OF THE DRAWING
The invention, both as to its organization and method of operation, together
with
further objects and advantages thereof, will best be understood by reference
to the specification
taken in conjunction with the accompanying drawing in which:
FIG. 1 is a right-side elevational view, with parts removed for clarity, of a
power
system provided with a ventilation arrangement in accordance with the present
invention;
FIG. 2 is a top plan view of portions of the power system of FIG. 1 with parts
removed
for clarity to illustrate the ventilation arrangement of the present
invention;
FIG. 3 is a perspective view of a power electronics assembly of the power
system of
FIGS. 1 and 2; and
FIGS. 4 and S are respective front and rear perspective views of a plenum of
the
ventilation arrangement of FIGS. 1 and 2.
-2-

CA 02280068 1999-08-11
SC-5296-C
DETAILED DESCRIPTION
Referring now to FIGS. l and 2, a ventilation arrangement 110 in accordance
with the
present invention is useful to provide a predetermined pattern and volume of
directed cooling air
within an enclosure 120 of a power system 112. In an illustrative embodiment,
the power system
112 includes power electronic assemblies 114, 116 and 118 (best seen in FIG.
2) housed within
the enclosure 120. In a specific application, medium voltages (e.g. 2-34.5 kv)
are applied across
the power electronic assemblies 114, 116 and 118. For example, in an
illustrative application,
each of the power electronic assemblies 114, 116 and 118 corresponds to an
individual phase or
pole of a multi-phase AC power system. The power electronic assemblies 114,
116 and 118
dissipate large quantities of heat such that large volumes of air flow are
required to ensure that
the assemblies are maintained at suitable operating temperatures to allow
adequate performance
of their functions. The power-electronic assemblies 114, 116 and 118 are
supported within the
enclosure 120 via suitable insulators, for example as illustrated generally in
FIG. 1 at 117, 119.
The ventilation arrangement 110 includes an air intake section 122 (FIG. 2)
which draws
in air at 121 via an air intake 123 and high pressure blowers at 124. In a
specific embodiment,
two blowers 124a and 124b are provided for redundancy in case one of the
blowers should
become non-functional. The air is drawn through filters 125 and through the
high pressure
blowers 124 and delivered into a plenum 126. The plenum 126 communicates to
insulating ducts
128. In the illustrative embodiment, three insulating ducts 128a, 128b and
128c (FIG. 2) are
connected to supply air to respective insulating plenums 130a, 130b and 130c,
one to supply air
to each of the power electronic assemblies 114, 116, and 118. The air is
directed through the
power electronic assemblies 114, 116 and 118 and exits at 134 into the
interior of the enclosure
120 and out of the enclosure 120 through an exhaust outlet at 136. Both the
intake 123 and the
outlet 136 include suitable vandal-deterrent features. The plenum 130 is
fabricated from
insulating materials such as GPO-3 fiberglass material. The insulating duct
128 is also fabricated
from insulating material. In a preferred embodiment for medium-voltage
applications, the
insulating duct 128 is fabricated from extremely low leakage material,e.g.
poly methyl
methacrylate (acrylic) or cycloaliphatic epoxy, that provides extremely low
tracking
characteristics. For example, the insulating duct 128 provides appropriate
dielectric withstand
(e.g. BIL voltages in the range of 50-150kv) for the various maximum potential
differences
between the power electronic assemblies 114, 116 and 118 and the connected air
delivery
components, e.g. the plenum 126 which is fabricated from steel in a specific
embodiment.
Refernng now additionally to FIG. 3, each of the power electronic assemblies
114, 116
and 118 includes power electronic stages or modules 140 that are stacked one
atop the other, e.g.
-3-

CA 02280068 1999-08-11
SC-5296-C
as illustrated at 140a, 140b and 140c. In an illustrative embodiment, the
power electronic stages
140 include compression-mounted power electronic devices 141 such as
semiconductors that are
clamped between interposed heat sink arrangements 142, e.g. as illustrated at
142a and 142b.
The heat sinks 142 include spaced fins 143 that are generally planar, e.g. as
illustrated at 143a,
143b. The heat sinks 142 are arranged such that the end portion 150 faces the
plenum 130, the
air being directed out of the plenum 130 in a direction 152 between and along
the fins 143 of the
heat sinks 142, i.e. parallel to the planes of the fins 143, with the air
exiting from the front end
portion 153 of the power electronic stages 140 in a direction 154. The power
electronic stages
140 are carried or supported via angle brackets 155 so as to provide slide-in
rack mounting of the
power electronic stages 140. The angle brackets 155 are carried by opposed
structural supports
156, 158. The structural supports 156, 158 are attached to and supported by
upper and lower
channels 157 and 159. The channels 157 and 159 also provide support for the
plenum 130. The
supports 156, 158 and the channels 157, 159 also provide additional flow-
directing functions by
bounding the perimeter of the power electronic stages 140.
In one specific embodiment, bus interconnection plates 144, 146 are provided
at the front
end 153 of the power electronic stages 140 to provide electrical connection
between the stages
140a and 140b and the stages 140b and 140c respectively so as to connect the
stages 140a, 140b
and 140c in electrical series relationship. A bus connection plate 148 is
provided at the front end
of the stage 140c, a similar bus connection plate (not shown) being provided
at the front end of
the stage 140a. In a specific illustrative arrangement, the power electronic
assemblies 114, 116
and 118 are connected to bus structure generally referred to at 111, 113 in
FIG. 1. The plates
144, 146 and 148 provide additional flow efficiency by closing off the
openings at the front 153
of the power electronic stages 140, creating a high pressure zone at the
output of the plenum 130
at the back end portion 150 of the power electronic stage 140.
In another specific embodiment, a bus interconnection plate 149 is utilized to
provide
electrical interconnection between the stages, e.g. 140b and 140c, in which
case the plates 144,
146 and 148 solely provide the function of an air dam and need not be
conductive.
In accordance with important aspects of the present invention and referring
now
additionally to FIGS. 4 and 5, the plenum 130 has a general overall shape of a
parallelepiped and
includes flow concentrating and directing arrangements for cooperation with
the power electronic
devices 114, 116 and 118. Specifically, the plenum 130 includes an opening 160
within a rear
wall 162 for receiving air from the insulating ducts 128. The plenum 130 also
includes wall-
defining sides 164 and 166. The generally open front 168 of the plenum 130
faces the rear end
portion 150 of the power electronic devices 114, 116, and 118. Blocking
members 70, 72 and
-4-

CA 02280068 1999-08-11
SC-5296-C
74, spanning the side walls 164, 166, are provided so as to define flow-
directing openings 176,
178, 180 and 182 that are aligned with the spacing between the heat sinks 142
of the power
electronic devices 114, 116 and 118. An equalization baffle 132 is provided in
the plenum 130
that provides more uniform air flow and is arranged to extend along the
expanse of the side walls
162, 164. In the illustrative embodiment, the equalization baffle 132 is a
generally planar
member including an array of openings 133. Thus air is efficiently channeled
and directed from
the ducts 128 through the fins 143 of the heat sinks 142 of the devices 114,
116 and 118. The
flow-directing openings 176, 178, 180 and 182 generally correspond to the
overall dimensions of
the power electronic stages 140a, 140b and 140c. In specific embodiments, the
size of the
openings 176, 178, 180 and 182 are varied to control the desired air flow
through the the power
electronic stages 140a, 140b and 140c.
While there have been illustrated and described various embodiments of the
present
invention, it will be apparent that various changes and modifications will
occur to those skilled
in the art. Accordingly, it is intended in the appended claims to cover all
such changes and
modifications that fall within the true spirit and scope of the present
invention.
-5-

Dessin représentatif
Une figure unique qui représente un dessin illustrant l'invention.
États administratifs

2024-08-01 : Dans le cadre de la transition vers les Brevets de nouvelle génération (BNG), la base de données sur les brevets canadiens (BDBC) contient désormais un Historique d'événement plus détaillé, qui reproduit le Journal des événements de notre nouvelle solution interne.

Veuillez noter que les événements débutant par « Inactive : » se réfèrent à des événements qui ne sont plus utilisés dans notre nouvelle solution interne.

Pour une meilleure compréhension de l'état de la demande ou brevet qui figure sur cette page, la rubrique Mise en garde , et les descriptions de Brevet , Historique d'événement , Taxes périodiques et Historique des paiements devraient être consultées.

Historique d'événement

Description Date
Demande non rétablie avant l'échéance 2003-08-11
Le délai pour l'annulation est expiré 2003-08-11
Réputée abandonnée - omission de répondre à un avis sur les taxes pour le maintien en état 2002-08-12
Demande publiée (accessible au public) 2000-06-22
Inactive : Page couverture publiée 2000-06-21
Inactive : CIB en 1re position 1999-10-05
Inactive : Certificat de dépôt - Sans RE (Anglais) 1999-09-13
Demande reçue - nationale ordinaire 1999-09-11
Lettre envoyée 1999-09-10

Historique d'abandonnement

Date d'abandonnement Raison Date de rétablissement
2002-08-12

Taxes périodiques

Le dernier paiement a été reçu le 2001-07-24

Avis : Si le paiement en totalité n'a pas été reçu au plus tard à la date indiquée, une taxe supplémentaire peut être imposée, soit une des taxes suivantes :

  • taxe de rétablissement ;
  • taxe pour paiement en souffrance ; ou
  • taxe additionnelle pour le renversement d'une péremption réputée.

Les taxes sur les brevets sont ajustées au 1er janvier de chaque année. Les montants ci-dessus sont les montants actuels s'ils sont reçus au plus tard le 31 décembre de l'année en cours.
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Historique des taxes

Type de taxes Anniversaire Échéance Date payée
Taxe pour le dépôt - générale 1999-08-11
Enregistrement d'un document 1999-08-11
TM (demande, 2e anniv.) - générale 02 2001-08-13 2001-07-24
Titulaires au dossier

Les titulaires actuels et antérieures au dossier sont affichés en ordre alphabétique.

Titulaires actuels au dossier
S & C ELECTRIC COMPANY
Titulaires antérieures au dossier
RAYMOND P. O'LEARY
RICHARD P. MIKOSZ
RONALD D. ATANUS
Les propriétaires antérieurs qui ne figurent pas dans la liste des « Propriétaires au dossier » apparaîtront dans d'autres documents au dossier.
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Description du
Document 
Date
(aaaa-mm-jj) 
Nombre de pages   Taille de l'image (Ko) 
Dessin représentatif 2000-06-13 1 9
Description 1999-08-10 5 290
Revendications 1999-08-10 2 79
Abrégé 1999-08-10 1 19
Dessins 1999-08-10 5 122
Courtoisie - Certificat d'enregistrement (document(s) connexe(s)) 1999-09-09 1 140
Certificat de dépôt (anglais) 1999-09-12 1 175
Rappel de taxe de maintien due 2001-04-11 1 111
Courtoisie - Lettre d'abandon (taxe de maintien en état) 2002-09-08 1 182