Adjustable-speed alternating current motor

Details Adjustable-speed alternating current motor Adjustable-speed alternating current motor

H - Electricity

02

P

H02P 7/282 (2006.01) H02K 16/02 (2006.01)

Patent

CA 2073164

In an induction motor, which may be squirrel-cage or wound- rotor, it is known that the speed of the motor depends o the power supply frequency and the number of stator poles. Although the speed of a wound-rotor type can be controlled by external resistors, the speed depends mainly on the load. In this invention the speed of an induction motor can be fully controlled - independent of the load - by applying a very small amount of direct current on the motor's field windings which interact with an intermediate rotor, without any alteration or change in the power supply.

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