| Hybrid excitation synchronous machine(HESM) with the magnetic shunt rotor is a novel HESM deriving from circumferentially-magnetized permanent magnet synchronous machine(PMSM). The introduction of the field current results in the field winding loss compared with the PMSM, which also makes the control methods of the HESM more flexible. The field current can regulate the air gap flux density, which may significantly recude the injection of field weaening current in the constant power operation aera. In this paper, the efficiency optimization control method of the rotor magnet-shunting hybrid excitation synchronous motor is investigated.The dissertation constructs the mathematical model of HESM in the stator/rotor coordinate based on the structural features and operating principle of HESM. Based on the investigation on the drive system and current control, a electrical loss minimization control method is prposed, by which the field current and armature current can be distributed under different operation situations, and the drive system efficiency can be improved. Furthermore, the Matlab/Simulink tool-kit is involved to simulate the fundamental characteristics and current control method, verifying the correctness of simulation model and control strategy.The test platform of an 100 k W HESM drive is experimentally researched. The inductance parameters are measured by the experimental verification, in which the variation law of inductance parameters is obtained. The operating stability and transient performance of HESM at different working status are augmented by implementing the current control regime in the speed-adjustable drive experiment. The efficiency of the drive system is improved by the proposed current coordination strategy. Finally, it can be validated that the HESM posssses broad variable-speed operation by coordinating the armature and field current, and the constant power range is more than 3.5 times the base speed. |
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