基于模糊PWM调制的低压脱离控制器

目前低压脱离控制器仅适应于单一电源系统，并且只能控制特定额定电压的继电器，限制了低压脱离控制器的使用环境。控制器的供电电压变化直接影响继电器的线圈电压，造成控制器的误操作。该文对低压脱离控制器的电压自适应性进行了研究，提出了模糊PWM驱动继电器的改进方案，并实现了一种基于PIC的多电压自适应低压脱离控制器。实验证明，该方案大大提高了系统的稳定性和自适应性，并保护了继电器。

Low Voltage Disconnect Based on Fuzzy PWM

Presently a low voltage disconnect (LVD) can only fit a single power system and drive a given rated voltage contactor, which limits the use of LVD. The fact that the change of LVD’s supply voltage influences the coil voltage of the contactor directly causes the misoperation of the LVD. This paper researches on the voltage self-adaptation of LVD and proposes a progressive scheme for driving contactor with PWM fuzzy controlled. A multi-voltage self-adaptive LVD based on PIC is developed. The result of the experiment shows that the scheme improves the self-adaptation and the stability of the system greatly, and protects the contactor.