Synchronous motor inductance detection method and device

• Main Authors: XU YIFEI, ZHANG ZHIXIN, LUO PENG, LI GUOCAI
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2020
• 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 provides a synchronous motor inductance detection method and device, and the method comprises the steps: applying a DC voltage of a first voltage angle to a motor, such that a motor rotor is located at the first voltage angle; applying a first group of pulse voltages to the motor according to a first preset rule, and obtaining a reference current generated by the motor in a first time period corresponding to the first group of pulse voltages, with the first group of pulse voltages being pulse voltages of a reference voltage angle; judging whether the reference current is greaterthan or equal to a preset current; and when the reference current is greater than or equal to the preset current, obtaining inductance corresponding to the reference current at a second voltage angleof the motor. The problem that in the prior art, the inductance value of the motor is obtained through specific current, deviation exists between the inductance value and the inductance of the motor in actual operation, and co