Permanent Magnet Servo Motor Drive System Developed Digital

As permanent magnet synchronous motor (PMSM) has advantages such as light weight, small size, simple structure, easy operation and high efficiency, it has been developed with good market prospectsin industrial applications, as a new type of synchronous motor, it has become the mainstream choice in industrial servomotor. A PMSM servo driver adopted the digital signal controller (DSC) and the Intelligent Power Module (IPM), based on the space vector control algorithm (FOC) is designed in this paper.Firstly, amathematical model of permanent magnet synchronous motor servo drive system based on digital signal controller (DSC) is established, and then the vector control theory and PWM control technology are detailed explained, system control scheme is simplified by coordinate transformation principle, the vector control methods based on the id=0control strategy are determined, and processes of the servo closed-loop control system are designed.The hardware of the permanent magnet synchronous motor servo drive system based on space vector control strategy is designed. The Cortex-M4architecture STM32F407VGT6is adopted as the main chip of the system, the Intelligent Power Module (IPM) is adopted as the core components of the power circuit. The power conversion circuits, optical coupler circuit, operational amplifier circuit, EEPROM memory circuit and other peripheral assistant interface circuits are designed, the hardware development of digital servo driver is completed.The software systems with the main architecture based on the main program and interrupt program are designed for the hardware circuit of the servo system. The whole process of the driver software system is designed, the solutions of the key issues, such as initial rotor initial positioning, produce of the SVPWM wave, PI regulator digital implementation issues are given. The servo control of the speed loop and current loop of permanent magnet synchronous motor is realized. Finally, the permanent magnetic servo motor drive system designed in this paper is debugged experiment, including hardware circuit debugging and no-load motor stability test, and the experimental results are analyzed. Experiments show that, the expected design target of the servo system is achieved, servo system can meet the application requirements of industrial servo control.