Self-Excitation System Using High-Efficiency Low-Power PM Generator

This paper presents a high-efficiency low-power permanent magnet (PM) generator for the power supply of the exciter. In the conventional generator system, the power for the exciter is fed by the generator output power or an emergency battery for the starting. The proposed low-power PM generator can generate the proper power and voltage to excite the exciter field winding. According to the generator starting, the designed PM generator can supply the constant voltage to the Automatic Voltage Regulator (A VR), then it can be used to control of exciter field current for the generator. Because of the designed PM generator inside of the conventional generator system, the emergency battery and Potential Transducer (PT) for A VR can be removed. Therefore, the total efficiency can be improved. The proposed system is validated experimentally.