基于ST7MC反电势过零检测的电压暂态分析及方案改进  

Voltage Transient Analysis and Program Improvement on ST7MC BEMF Zero-crossing Detection

作　　者：周群[1] 

机构地区：[1]解放军电子工程学院,合肥230009

出　　处：《微电机》2008年第8期73-75,共3页Micromotors

摘　　要：介绍了一种基于ST7MC的反电势过零检测方法。通过对PWM关断期间断电绕组端电压的暂态分析,提出了一种在不同占空比情况下分别对PWM的关断或导通阶段进行采样的改进型反电势过零检测方法。A BEMF zero-crossing detection method based on ST7MC was introduced in this paper. By the voltage transient analysis of non-energised phase during PWM OFF time, an improved method that sampling in PWM OFF or ON time at different duty cycle was presented.

关 键 词：无位置传感器 反电动势 无刷直流电机 寄生电容 

分 类 号：TM361[电气工程—电机]