一种新型嵌入式水泵专用变频控制器设计

Design of a novel embedded inverter controller for pumps

针对水泵的具体使用特点,应用DSP电机控制芯片ADMCF328和PIC单片机设计了嵌入式的水泵专用变频器.该变频器采用空间矢量调制技术,提高了电源的利用率和电机的低速转矩;由PIC单片机实现了键盘显示等功能,并通过串行方式与ADMCF328进行通讯联系;同时增加了别具特色的"巡检"等功能,使之使用更加方便,更具有专业化的特点.给出该变频器的系统结构原理电路,以及空间矢量调制技术的DSP实现原理,分析了其相电压波形并得到了实验验证.

According to the characteristics on the use of pumps,a specific & embedded inverter is designed based on the ADMCF328,one of the DSPs of Analog Devices Inc., and PIC, one of the microchip controllers of Microship Co. The Space Vector Modulation(SVM),which is helpful for increasing the power utilization and low speed torque of the pumps,is adopted;the functions of keyboard and LED display are achieved by a microchip controller,PIC16C55; some special functions,such as period inspection,which can make the equipment more facile and more practical,are added to the inverter. The schematic circuit of the inverter and the principle of SVM achieved with DSP are given,and the phase voltage under SVM is analyzed and verified by the tests.