AN ELECTRICITY GENERATOR IN WHICH THE STATOR ROTATES IN A DIRECTION OPPOSITE TO THE ROTOR

GENERATEUR D'ELECTRICITE AVEC STATOR ET ROTOR TOURNANT EN SENS CONTRAIRES

English Abstract

High torque and low rpm characterize in-stream wind and hydro turbines.
To obtain acceptable efficiencies, conventional generators require step-up
gearboxes from low rpm turbines. Gearboxes are expensive, unreliable, high
maintenance, and inefficient. Although generators are available that allow
direct
coupling to low rpm turbines, the generator's power is directly proportional
to its
torque handling capability and rpm. Higher torque handling capability
increases
generator size, weight and cost. Higher rpm allows a given size generator to
produce more power; in particular, doubling the rpm doubles the generator
output
power and also improves efficiency. This invention is related to a turbine
with
two rotating components, one coupled to the rotor and the other coupled to the
stator of a generator such that the rotor and stator turn in opposite
directions.
This counter-rotation increases the effective rpm applied to the generator and
proportionately increases the power output of the generator.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A coupling of two rotating turbines to a generator; where:
the first turbine is coupled to the generator rotor, and
the second turbine is coupled to the generator stator, and
the first turbine imparts rotation in the opposite direction to the
second turbine thereby increasing the relative rpm between
the rotor and stator.
2. A direct coupling of two counter-rotating turbines to a generator as
defined
in claim 1; where:
the first turbine is direct coupled to the generator rotor, and
the second turbine is direct coupled to the generator stator, and
the first turbine is rotating in the opposite direction to the second
turbine thereby increasing the relative rpm between the rotor
and stator.
3. A coupling of two turbines rotating in the same direction to a generator as
defined in claim 1; where:
the first turbine is coupled to the generator rotor, and
the second turbine is coupled to the generator stator, and
the first turbine imparts rotation in the opposite direction to the
second turbine by means of a rotation reversing apparatus,
thereby increasing the relative rpm between the rotor and
stator.

Description

CA 02549194 2006-05-31
ECO HYDRO ENERGY LTD
Detail description of Patent Application dated May 31, 2006
TITLE OF INVENTION
An electricity generator in which the stator rotates in a direction opposite
to
the rotor.
FURTHER ATTACHMENTS
Drawing no. 1 which illustrates power generation by the movable turbine
cylinder.
Drawing no. 2 which illustrates power generation using the movable axle.
TECHNOLOGY DESCRIPTION
The generator has a stator which turns in one direction and a rotor which
turns in the opposite direction. The field winding is in a U shape with plus
and minus poles of the magnets creating exciter action.
Drawing No. 1 details show the following:-
01 Power transfer gear attached to bearing around the fixed axle.
02 Generator driving gear.
03 Exterior of rotating turbine cylinder attached to fixed axle bearing (04).
04 Fixed axle bearing.
05 Counter-rotation gear.
06 Rotor of the generator.
07 Field windings.
08 Generator stator fixed to exterior rotating cylinder.
09 Direction of rotation that drives all the other gears. This direction is
reversible.
Drawing No. 2 details show the following:-
10 Movable axle (power source)
11 Axle bearing
12 & 14 Generator stator fixed solid to axle
13 Field Windings
Movable generator rotor attached to bearing
16 Fixed housing
17 Direction of rotation that drives the other gears. This direction is
reversible
18 Driving gear fixed solid to axle (10)
19 Counter-rotation gear
Movable gear fixed to bearing and rotor

Representative Drawing