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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2016, Vol. 37 ›› Issue (9): 2775-2787.doi: 10.7527/S1000-6893.2016.0025

• Electronics and Control • Previous Articles     Next Articles

Fault-tolerant internal permanent magnet generation system used in aviation engines

YU Shiyi, HAO Zhenyang   

  1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China
  • Received:2015-10-12 Revised:2015-12-05 Online:2016-09-15 Published:2016-01-20
  • Supported by:

    National Natural Science Foundation of China (51307081); Natural Science Foundation of Jiangsu Province (BK2012386)

Abstract:

High power density, high reliability and high output performance are required by internal power generation system in aviation. Thus, fault-tolerant permanent magnet generation system based on three-phase four-leg circuit topology was proposed. The permanent magnet fault-tolerant motor has the characteristics of large inductance. Id analysis flux-weakening control method is put forward by improving traditional flux-weakening control algorithm. It is a simple and efficient method. Id current is calculated in real time. The algorithm can realize the constant voltage generation control in a wide speed range (three times of rated speed) by calculating the given flux-weakening current at real-time. Based on the characteristics of magnet isolation, the fault tolerant control of one-phase fault including open-circuit and short-circuit is proposed. Combining with space vector pulse width modulation (SVPWM) algorithm, it means to keep the magnetic fields generated by stator current as circular rotating fields. MATLAB simulation results verify the correctness of the Id analysis method for the flux-weakening control and fault tolerant control. Finally, a 7.5 kW fault-tolerant permanent magnet motor and its control system were tested. The experimental results also validate the Id analysis method for flux-weakening and the fault tolerant control method, which lays the foundation for the follow-up system performance test.

Key words: internal power generation system, Id analysis method, flux-weakening control, fault-tolerant control, permanent magnet motor

CLC Number: