Decoupling method of wound-rotor bearingless asynchronous motor

• Main Authors: SUN CHAO, JIA PEIJIE, JIA JINGJING, DING QIFENG, SUN XIAODONG, LU CHENGLING, YANG ZEBIN
• Format: Patent
• Language: Chinese; English
• Published: 05.02.2021
• 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 decoupling method of a wound-rotor bearingless asynchronous motor. The decoupling method comprises a three-phase winding equivalent inductance parameter calculation method, avoltage equation and flux linkage equation construction method and a motor electromagnetic torque and suspension force independent control strategy based on magnetic field orientation. The method comprises the following steps: establishing an inductance matrix of the wound-rotor bearingless asynchronous motor and simplifying the inductance matrix by adopting an equivalence principle; deducing a voltage equation and a flux linkage equation of the motor; and finally, adopting a vector control strategy of torque magnetic field orientation and air gap magnetic field orientation to decompose the original system into two subsystems capable of independently controlling the rotating speed and the flux linkage of the motor. On the basis of establishing an accurate mathematic model of the wound-rotor bearingless asynchrono