System and method for determining the resistance of the stator winding in a motor that uses AC motor controllers

摘要

System for estimating the resistance of a stator winding of an alternating current motor (AC), the system comprising: a controller (10) of AC motor having a plug inlet to an AC source and outlet connectable to unterminal of input an AC motor, controlled (10) of the AC motor comprising: a converter (24) of pulse width modulation (PWM) having a plurality of switches paracontrolar current flow and terminal voltages in the AC motor; and a control system (28) connected to the PWM (24) converter and configured to: generate a command signal to the PWM (24) converter to control output corresponding driver delmotor CA (10) with the engine inlet CA ; selectively generating a signal modified instruction to the PWM (24) converter inject unaseñal DC controller output (10) of the AC motor with the signal amplitude injected DC adjusted demanera the torque pulsations in the AC motor caused by the injected DC signal they remain within unrango predetermined tolerance; and determining the resistance of the stator winding of an AC motor based on the signal DC least unode said voltage and current.