ASYNCHRONOUS DOUBLE-SPEED MOTOR Russian patent published in 2012 - IPC H02K17/16 H02K5/136 H02K9/22 

FIELD: electricity.

SUBSTANCE: motor consists of body with stator with low and high speed windings mounted in slots, rotor fixed at motor shaft and box of inputs with through joints connected to outputs of specified windings. According to invention winding changeover device is located at motor body; input terminals of the motor should have facilities for connection of feeder current-carrying leads and output terminals of winding changeover device should be connected electrically with through joints connected to outputs of motor windings. Winding changeover device can be located in box of inputs; for this purpose two outputs of this device should be connected through its break-type contacts to outputs of low speed windings of the motor and two outputs through normally open contacts of device should be connected to through joints, which are connected to high speed windings of the motor. Third outputs of low and high speed windings should be interconnected and then connected to the third through joint in box of motor inputs.

EFFECT: simplification of power supply system structure, improvement of control and protection, enhancement of reliability and operation of asynchronous double-speed motors due to their power supply by one cable and due to motor control and protection by one device instead of two devices.

2 cl, 2 dwg