自励复合励磁稀土永磁发电机的设计与性能分析

The Design and Performance Analysis on the Self-excited Hybrid Excitation Rare Earth Permanent Magnet Generator

稀土永磁发电机(REPMG)气隙磁场是由永磁体提供的,具有结构简单、效率高等特点,但是永磁体工作点由于负载电枢反应产生动态变化而无法调节,导致REPMG气隙磁场无法调节,所以电压稳态调整率比电励磁发电机大得很多,本文研究自励复合励磁稀土永磁发电机(SEHEREPMG)的设计,采用实时检测负载电流自动调节自励励磁电流来补偿电枢反应,实现REPMG气隙磁场可调,通过分析典型规格样机实测性能表明可以减小REPMG的电压稳态调整率,具有工程实用性。

Rare earth permanent magnet generator （REPMG） air-gap magnetic field is provided by a permanent magnet, having such characteristics as simple structure and high efficiency. However, the working point of the permanent magnet with load armature reaction changes makes dynamics changes unable be adjusted, resulting in the REPMG permanent magnet air gap magnetic field unable to be adjusted, so the REPMG voltage regulation rate is much larger than that electric excitation magnet field generator voltage regulation rate. This paper resear- ches the self-excited hybrid excitation REPMG （SEHEREPMG） design, by real-time detection SEHEREPMG load current to automatically adjust self-exciting current to compensate for the armature reaction, achieve the SE- HREPMG air gap magnetic field adjustable, by analyzing the performance of the typical specifications prototype, the results show that the SEHREPMG voltage steady-state regulation rate can be reduced, with engineering prac- ticality.