A Servo System of AC Motor Based on Voltage Modulation Fitting for FPGA and Consideration of Voltage Saturation

作者：Takahashi Kenji^*; Kanmachi Toshiyuki; Ohishi Kiyoshi

来源：Electrical Engineering in Japan, 2010, 173(1): 60-68.

DOI：10.1002/eej.20989

• AC servo system
• vector control
• space voltage vector modulation inverter
• FPGA
• voltage saturation

This paper proposes a space voltage vector modulation (SVM) method for a speed servo system to obtain a quick current response. The proposed SVM method shortens the control lag time of the conventional SVM inverter. In addition, this proposed method is easily implemented in hardware using an FPGA (Field Programmable Gate Array) because the proposed SVM equations are transformed into expressions that hardly need multiplication. By using the proposed SVM method, the servo system realizes quick and stable current control with wide bandwidth. Moreover, by using PI controllers considering the voltage saturation and the torque limiter to the speed servo system, the servo system carries out stable speed control on voltage saturation. Both the proposed SVM method and the PI controllers considering voltage saturation are applied to the speed servo system of a vector controlled induction motor. The effectiveness of both the proposed SVM method and the PI controllers considering voltage saturation is verified by the experimental results.

• 出版日期2010-10