SEMICONDUCTOR DEVICE TO CONTROL SPEED OF SINGLE-PHASE DOUBLE-WINDING INDUCTION MOTOR Russian patent published in 2011 - IPC H02P1/42 H02P25/04 H02P27/04 

FIELD: electricity.

SUBSTANCE: semiconductor device to control speed comprises reversible semiconductor switchboards, which are designed for connection to stator windings of a single-phase double-winding induction motor. Each of reversible semiconductor switchboards comprises two transistors. Collectors of odd transistors and emitters of even transistors in each semiconductor switchboard are connected to a phase wire of a supplying network. Emitters of odd transistors are connected to collectors of even transistors. The common point of connection of odd and even transistors of the first semiconductor switchboard is designed to connect to the first input of the single-phase double-winding induction motor stator winding. The common point of connection of odd and even transistors of the second semiconductor switchboard is designed to connect to the first input of the second motor stator winding. Combined second outputs of the motor stator windings are connected to the zero wire of the AC supplying network.

EFFECT: simplified system to control transistors switching and to increase reliability and efficiency of the device as a whole.

13 dwg