摘 要:该文给出了一种永磁同步主轴电机无速度传感器伺服控制器的硬件设计方案,并在一片现场可编程门阵列FPGA中得到验证和实现。该方案综合运用了励磁电流id为0的矢量控制、速度PI调节、励磁电流PI调节、转矩电流PI调节、转子位置和速度估计、带死区的电压空间矢量调制等。电流环和速度环的采样频率可达20 kHz和2 kHz,设计的伺服控制器利用通信接口,可以在线设置永磁同步电机和各种控制参数。在主轴驱动系统中的实验结果表明,转子位置和速度估计准确,系统有良好的动、静态性能,最高转速可达8000 r/min. 这种系统可以广泛应用于计算机光驱、硬盘、DVD、数控机床、智能机器人等主轴驱动系统中。 关键词:无速度传感器;现场可编程门阵列;永磁同步电机;开环估计;数字控制集成电路;主轴驱动
Abstract: This paper presented a fully digitized hardware design scheme of a sensorless speed control IC for permanent magnet synchronous spindle motors, which was verified and implemented on one-chip field programmable gate arrays (FPGA). This scheme integrated the vector control strategy, the id being zero algorithm, the speed PI regulating technique ,the excited PI regulating technique ,the torque PI regulating technique and the SVPWM principle with dead times , the rotor position and speed estimation design method. The frequency of the current loop and the speed loop can be set to 20kHz and 2kHz. The realized controller IC also contained standard communication interface, which enabled the on-line configuration for PMSM and all kinds of control parameters. Experiments in a spindle drive system indicate the rotor position and speed estimation is right and the controller can provide a controllable speed range from 0 to 8000 r/min with satisfactory dynamic and static performances. This system can be used in computer hard-disk, DVD, CNC, and robust spindle drive systems. Key words: sensorless operation;FPGA;PMSM;open loop estimation;digital control IC;spindle drive
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