摘要
针对控制电器的电磁系统节能问题,提出了一种基于晶闸管的电磁系统节能方案。晶闸管控制单元输入端接交流电源,通过调节可变电阻值来控制电容的充放电时间,经电容的不同充放电时间改变晶闸管的触发脉冲移相角度的大小,进而改变晶闸管的导通角大小。通过调整可变电阻的阻值,可获得不同的吸合电压和保持电压,适用于交流接触器不同的电磁系统,使通用性大大增强。
For the electromagnetic system of control electrical equipments＇ s energy saving issues, a thyristor based electromagnetic system energy saving program was proposed. The input terminal of thyristor control unit is connected to AC power. Capacitor charging and discharging time is controlled by adjusting the variable resistor. Different charging and discharging time of the capacitor can change the phase-shifting angle of the thyristor trigger pulses thereby changing the conduction angle of the thyristor. By adjusting the variable resistor, different pull-in voltage and hold voltage are obtained which can be applied to different electromagnetic systems, and enhances the versatility greatly.
出处
《低压电器》
2013年第10期19-22,共4页
Low Voltage Apparatus
关键词
交流接触器
电磁系统
节能装置
晶闸管
导通角
AC contactor
electromagnetic system
energy saving device
thyristor
conduction angle
