Method for speed control of motor without sensor in a motor drive and motor drive;

摘要

Method for speed control of motor without sensor in a motor drive; and drive motor drives the motor (10) and control methods (100) are presented for speed control of motor without sensor, in which the output currents of the inverter (IA, IB, IC) are sampled S of the output of the inverter.And a value of the modulation frequency (25a) is determined based on the feedback of current and one or more commands of voltage (V * V * B, V * c) or in one or more feedback signals from voltage (VA, VB, VC).A setpoint speed or frequency (21, 31) is adjusted, at least in part, according to the value of frequency modulation (25a) to provide a value of set point frequency or speed adjusted (31a), which is then used in the control (110) of the inverter (14). P To provide stability control to mitigate the instability or disruption of the engine.