摘要：针对车载驱动领域对低压小体积大电流电机驱动器的实际需求，设计实现了基于TI的TMS320F2812为主控单元，以增量式编码器、小阻值大功率采样电阻为电机速度及电流采集单元，以低压小封装大电流MOSFET为功率驱动单元的低压高功率密度电机驱动器。详细介绍硬件设计方案，通过高密度PCB设计及相关结构工艺设计，并配合相关的速度嵌套分段控制及参数检测程序，提高了驱动器的集成度及可靠性。以额定电流为20A的直流伺服电机为测试电机，测试表明：系统运行稳态精度较高，加载响应稳定可靠。
关键词：高功率密度；TMS320F2812；高密度PCB设计；直流伺服电机

Abstract: Based on the demand of lowvoltage, smallsize and highcurrent motor drive in the vehiclemounted servo system, the lowvoltage and high power density motor drive, which used TMS320F2812 of TI as the control unit, incremental encoder and smallvalue, highpower sensor resistor as motor speed and current acquisition unit, lowvoltage and high power density MOSFET as driving unit, was designed and implemented. The hardware of driving system was introduced in details, and then the designs of highdensity PCB, structure and technology, with relevant speed control of nested segment and parameters testing procedures, were employed to improve the driver integration and reliability. A DC servo motor with a rated current of 20 amps was used as a test motor. The experimental results indicate that the driving system has the advantages of high steadystate accuracy and stable load response.
Key words: high power density; TMS320F2812; design of high density PCB; DC servo motor