电路工作原理
该相线、零线接反自动矫正器电路由晶体管Vl-V3、继电器K、二极管VDl、VD2、电阻器Rl-R3和电容器Cl、C2组成,如图5-184所示.
当将A、B两端分别与市电的相线、零线 (A接相线、B接零线)相连接时,Vl-V3均处于截止状态,K不吸合,市电通过K的两组常闭触头向负载电路供电.
若将A端接市电的零线、B端接市电的相线时,则VDl导通,使Vl-V3均导通,K吸合,其常闭触头断开,常开触头接通,市电经K的两组常开触头向负载电路供电.
元器件选择·
Rl-R3均选用1/4W金属膜电阻器.
Cl选用耐压值为630V的瓷介电容器;C2选用耐压值为lOV的铝电解电容器.
VDl和VD2选用1N4001或1N4007型硅整流二极管.
Vl、V2选用S9013或S9014型硅NPN晶体管;V3选用3AX31或3AX8l型锗PNP晶体管.
K选用带两组触头的6v直流继电器.
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