基于FPGA的无刷直流电机数字控制方法研究

Research on Digital FPGA-Based Control Method of Brushless DC Motor

为了实现简单且高效的无刷直流电机(BLDC)驱动系统,提出了一种简单新型的基于FPGA的数字脉冲宽度调制(PWM)控制器的模型和匹配的控制算法,该控制器将梯形磁通分布的BLDC电机看作是一个数字系统,通过低功率和高功率的交替使用进行速度调节,非常便于设计实现。此外,提出的设计只使用直流环节的一个电流传感器,减少了成本和硬件的复杂性。并通过模拟实验对提出的控制方法进行了证实,结果显示提出方法的最大误差保持低于5%。因此,这种控制技术非常适合不需要高精度的应用。

In order to achieve a simple and efficient brushless DC（BLDC）motor drive system of the brushless DC motor,a simple model of FPGA is presented based on the digital pulse width modulation（PWM）controller,model and control algorithm. The controller will take BLDC motor flux distribution of the ladder as a digital system,low power and the alternate use of high-powered speed adjustment,it is easy to realize the design and implement. In ad-dition,a current sensor design is proposed only by using the DC link to reduce the cost and the complexity of hard-ware. And through the simulation experiment of the proposed control method was verified,the results show that the maximum error of the proposed method is decreased below 5%. Therefore,the control technology is very suitable for applications that don＇t require high accuracy.