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

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 researches 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 SEHREPMG 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 practicality.