FPGAを用いた超高速PMSM駆動システムによる効率向上とトルクリプル低減効果

抄録

Permanent magnet synchronous motors (PMSMs) have been used in numerous applications due to their many attractive characteristics, such as high power, high efficiency, and wide operating-speed range. Moreover, high-speed PMSM drive systems are used in various applications. In recent years, such systems have become much smaller and have come to have a higher power density. Because of the increase in the motor fundamental frequency in the high-speed region, it is necessary to reduce the control period. Conventionally, digital signal processors and microcomputers have been used for high-performance processers. The field-programmable gate array (FPGA) which is a logic-integrated circuit can also reduce the control period simply because of fast hardware performance. This paper proposes a high-speed PMSM drive system based on direct torque control (DTC) implemented in an FPGA. In this paper, the operating characteristics of the proposed system using a PMSM having a rated speed of 42,000 min^-1 are showed. Furthermore, the effects of efficiency improvement and torque ripple reduction are examined experimentally.