基于升压斩波级联方式的接触器控制模块设计

Design of the Contactor Control Module Based on the Cascade Boost-chopper

针对低电压供电系统,提出一种基于升压斩波级联方式的接触器智能控制方案,该方案属于间接能量控制模式,能够灵活地进行电压/电流变换,提高了接触器闭环控制的灵活性和可靠性。阐述了控制模块的两种工作模式;对控制模块进行小信号仿真分析,设计前级升压电路的反馈环;在实验的基础上研究占空比调节方式与电磁机构音频噪声之间的关系,提出电磁音频噪声抑制方法,并进行接触器吸持数字电流环设计,该方法对不同励磁电压下的接触器电磁机构智能控制策略,具有普遍意义;通过相关实验验证了控制方案的思路和方法。

The intelligent control scheme based on the cascade boost-chopper was proposed for low voltage supply systems. The scheme is a kind of indirect energy control modes, which can neatly perform the voltage transformation and current transformation. With this control scheme, the dose-loop control of the contactor is more flexible and reliable. Two working modes of the control module were elaborated firstly; Small-signal analysis and corresponding simulations were further performed for the control module to guide the feedback loop design of the boost circuit. The relationship between adjustment of duty cycle and audio noise of solenoid actuators was studied on the basis of experiments. Furthermore the method to suppress electromagnetic audio noise was given with the design of digital current loop when the contactor is holding. The method is effective for intelligent control of solenoid actuators in contactors under different exciting voltages. The concept and method of control scheme were verified through experimental results.