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The motor protector circuit diagram 2

2016-09-02 17:58  
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The motor protector circuit diagram 2
The motor protection circuit is composed of the DC power supply circuit, phase sequence detection circuit, sampling control circuit and automatic commutation circuit, and the circuit is shown as the chart. DC power supply circuit is composed of the fuse FU2, power transformer T, bridge rectifier UR, filter capacitors C1, C2, and three-terminal voltage regulator integrated circuit IC1. Phase sequence detection circuit is composed of the capacitor C3, resistors R1 ~ R3 and indicator light HL. Sampling control circuit consists of the photosensitive resistor RC, potentiometer RP1, transistor V, relay K1, diode VD1, resistor R5, LED VL1 and AC contactor KM1 and so on. R1 ~ R5 and R7 use 1/4W carbon film resistors or metal film resistors; R6 uses 1/2W metal film resistor.