DEVICE FOR SHAPING CURRENT IN INDUCTION MOTOR PHASE Russian patent published in 1994 - IPC

FIELD: radio engineering. SUBSTANCE: device has digital sine-wave signal generator whose output is connected to inverting input of first differential amplifier whose forward input is connected to sawtooth voltage generator output and to forward input of second differential amplifier. Inverting input of second differential amplifier is connected to data output of current sensor and its output is connected to J-input of JK flip-flop and to input of NOT gate whose output is connected to K-input of JK flip-flop whose C-input is connected to output of first differential amplifier; JK flip-flop output is connected to input of control pulse shaper whose first and second outputs are connected, respectively, to first and second inputs of inverter whose output is connected via power circuit of current sensor to phase winding of induction motor. Control pulse shaper is built sensor to phase winding of induction motor. Control pulse shaper is built up of NOT logic gate and two NAND gates. EFFECT: improved design. 4 dwg