H - Electricity – 02 – P
Patent
H - Electricity
02
P
H02P 27/16 (2006.01) H02P 25/04 (2006.01)
Patent
CA 2267035
An apparatus for controlling the speed of an induction motor includes a first winding and a second winding. The first winding and second winding are adapted to be coupled to an AC source for supplying an AC input signal. A first switching device is coupled to the first winding and a second switching device is coupled to the second winding. Each of the switching devices is operative in a low impedance state enabling current to flow through the associated winding of each switching device and a high impedance state preventing significant current flow through the associated winding of each switching device. A controller switches each of the switching devices from the high impedance state to the low impedance state in a sequence for controlling the current in the windings, which induces a phase shift between the AC voltages across the windings.
Kemp William Harry
Shideler Victor Joseph
Gowling Lafleur Henderson Llp
Sequence Controls Inc.
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