基于单周期控制的PWM电流控制系统设计与实现

针对无刷直流电机（BLDC）驱动器的电流控制问题，在本文中提出了一种改进的基于单周控制的低成本转子位置估算方法。该估算方法以真实反电势过零点的检测为依据，这些真实反电势过零点可直接通过检测相端和直流环节中点之间的电压来提取，无需电机中性点电压。电流控制系统通过一种低成本的通用自动电压调整微控制器（Atmega8）来实现。MATLAB仿真和实验测试结果均显示相比传统的滞环控制器方法，改进后的PWM（脉冲宽度调制）无刷直流电机电流控制系统在稳态和瞬态两种情况下表现出更好的性能。

Design and implementation of the PWM current controller based on one cycle control

According to the current brushless DC motor drive control problem, an improved method to estimate the rotor position of low cost based on one cycle control is presented. The estimation method based on real back EMF zero crossing detection is based on the true, the back EMF zero crossing detection can be directly through the voltage between phase end and the DC link midpoint to extract, without the motor neutral point voltage. The current control system by the general automatic voltage regulation of a kind of low cost microcontroller (Atmega8) to achieve. MATLAB simulation and practical test results showed that compared with the traditional Hysteresis controller method, the improved PWM (pulse width modulation) brushless DC motor control system of steady state and transient current in two cases showed better performance.