利用固态继电器改造包装机加热系统

Using Solid State Relay to Reform the Heating System of Packing Machine

交流接触器是利用线圈得失电时电磁力的有无来吸合、释放衔铁,并联动其主触点相应动作,从而达到通、断主电路的目的,在一般的控制电路中应用十分广泛。但是对于触点通断过于频繁的电路,交流接触器常会出现机械动作不可靠、触点打火烧毁等故障。利用固态继电器无机械触点、闭合次数高达109的特性来取代交流接触器,并在实际应用中得到了验证。

AC contactors are widely used in common controlling circuits.As the contact close and open too frequently,the contactor may have unreliable action,contact sparks and so on.Solid state relay has no mechanical contact and its on-off number can reach 109.This paper introduces the reform of the heating system of packing machine by replacing AC contactors with solid state relays,and practice shows the reform is successful.