一种小型高功率密度伺服驱动模块设计

Design of a Miniature and High Power Density Servo Drive Module

关键词:  交流伺服系统  高功率密度  保护电路  功率驱动

Key words:  AC servo system  High power density  Protection circuit  Power drive

摘要:

针对新一代工业数控系统对交流伺服驱动控制系统提出的小型化、高功率密度的迫切需求,提出一种新型功率伺服驱动模块。该模块集栅极驱动、功率变换、信号传感、电路保护等多功能于一体。重点研究了功率开关器件 MOSFET的驱动电路和过压、过流及过温保护电路,详细说明了各保护电路结构及参数的优化计算方法。试验结果表明:该伺服驱动模块具有体积小、驱动能力强、功率密度高、功耗低和可靠性高等优点。

Abstract:

Aiming at the urgent demand of miniaturization and high power density of AC servo drive control system for the new generation industral numerical control system,a novel power servo drive module is proposed. Functions such as grid drive,power conversion,signal measurement,and circuit protection are integrated into the designed module. Focusing on the over-voltage,over-current and over-temperature protection circuit of the power switch device MOSFET,the circuit structure and the parameter optimization method are introduced in detail respectively. The experimental results further indicate that the designed power servo drive module has the advantages of small volume,high driving ability,high power density,low power consumption,and high reliability,etc.