Research on field current control of hybrid excitation permanent magnet synchronous generator

In order to adjust the air-gap magnetic field of the permanent magnet(PM) machine, one hybrid excitation permanent magnet synchronous generator(HEPMSG) utilizing tooth harmonic for excitation was proposed. This paper introduced the structure and principle of the HEPMSG, and the wireless transmission technology was applied for the field current control of the tooth harmonic excitation system. The rotor tooth harmonic excitation control circuit of the HEPMSG was studied, including the excitation main circuit, the driving circuit, the wireless signal receiver and its processing circuit, and the power supply circuit. Finally, some experiments were performed for one HEPMSG utilizing tooth harmonic for excitation, and the experimental results verified the correctness and effectiveness of the proposed HEPMSG.