Soft damping adjustment method and system of high-speed permanent magnet synchronous motor V/F control system

• Main Authors: HUANG SHOUDAO, ZHU XIAOFEN, HUANG KEYUAN
• Format: Patent
• Language: Chinese; English
• Published: 27.04.2018
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a soft damping adjustment method and system of a high-speed permanent magnet synchronous motor V/F control system. According to the invention, the calculated value of the steady-state induced electromotive force of a motor is used as the reference voltage Es set by a V/F curve to ensure constant magnetic flux; the instantaneous measurement value of the stator current is detected, and the resistance drop of a stator is calculated to carry out real-time dynamic compensation on the voltage of the stator end to ensure constant flux linkage; according to the quasi-steady state small signal model of a rotor end, the damping effect of the torque on the rotor end is simulated; the feedback adjustment link of electrical frequency variation is introduced; a damping factor isset according to pole configuration; when a load or rotation speed changes, the electromagnetic recovery torque of the rotor end is increased through the adjustment feedback link; the damping effect of the system is enhanced;