Prediction method of rotor position and angular velocity of permanent magnet hub motor

• Main Authors: CHEN LONG, JIN ZHIJIA, SU BOKAI, SUN XIAODONG, LI KE, YANG ZEBIN
• Format: Patent
• Language: Chinese; English
• Published: 11.09.2018
• 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 prediction method of the rotor position and the angular velocity of a permanent magnet hub motor. The method includes: establishing a motor model in finite element analysis software, and loading different simulation currents I to the model to obtain a magnetic flux linkage lambda and a back electromotive force e; performing Fourier transform on the magnetic flux linkage lambda and the back electromotive force e to obtain a fundamental wave magnetic flux linkage lambdaf and a fundamental wave back electromotive force ef; removing interference data to obtain a magneticflux linkage lambdaf* and a back electromotive force ef*; training a BP artificial neural network by regarding the simulation currents I as input values of the BP neural network and the magnetic fluxlinkage lambdaf* and the back electromotive force ef* as output values of the BP neural network; inputting an operating current Is measured online in the operation state of the permanent magnet hub motor to the trained BP neur