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伺服驱动器的工作原理？
目前主流的伺服驱动器均采用数字信号处理器（DSP）作为控制核心，
可以实现比较复杂的控制算法，实现数字化、网络化和智能化。
功率器件普遍采用以智能功率模块（IPM）为核心设计的驱动电路,
IPM内部集成了驱动电路,同时具有过电压、过电流、过热、
欠压等故障检测保护电路,在主回路中还加入软启动电路,
以减小启动过程对驱动器的冲击。功率驱动单元首先通过三相
全桥整流电路对输入的三相电或者市电进行整流，得到相应的直流电。
经过整流好的三相电或市电，再通过三相正弦PWM电压型逆变器变频
来驱动三相永磁式同步交流伺服电机。功率驱动单元的整个过程
可以简单的说就是AC-DC-AC的过程。整流单元（AC-DC）主要的
拓扑电路是三相全桥不控整流电路。随着伺服系统的大规模应用，
伺服驱动器使用、伺服驱动器调试、伺服驱动器维修都是伺服驱动器
在当今比较重要的技术课题，越来越多工控技术服务商对
伺服驱动器进行了技术深层次研究。
厦门欧控电气有限公司
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