Modeling and Analysis of a New Voltage Regulation Method for Surface-Mounted Permanent Magnet Synchronous Generator

The current trend for future aircraft is the adoption of the More Electric Aircraft (MEA) concept. The electrical based starter-generator (S/G) system is one of the core ideas from the MEA concept. Usually, the starter-generator produces constant torque as a starter and constant power as a generator. Surface-mounted permanent magnet synchronous generator (SPMSG) is suitable for a high speed operation, which can improve the power density of electrical system. But it is difficult for SPMSG to keep producing constant power for a wide speed operation. This paper proposes a new voltage regulation method of SPMSG for a wide-speed-range operation. After analyzing the stability of two types of single current regulator (SCR), the q-axis SCR is applied to enhance the field weakening ability of SPMSG, which means that the speed operation range of SPMSG is extended. The proposed voltage regulation method has been implemented in simulation over a speed range of 10,000 similar to 24,000rpm. The results indicate that the system with this proposed method can respond quickly and remain stable, and the dynamic performance improved significantly in sudden change of the load.