High-capacity-motor slow-starting protective device
A protection device and a slow technology, applied in emergency protection circuit devices, circuit devices, starters of single multi-phase induction motors, etc., can solve the problems of reduced service life of the motor, large starting current of the motor, and burnout of the motor, etc., and achieve improvement Work efficiency, prolong service life, avoid burnout effect
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[0010] The present invention will be further described below in conjunction with accompanying drawing:
[0011] As shown in the drawings: the present invention includes an AC power supply, a rectifier circuit, a bidirectional thyristor SCR, a unijunction transistor BT, a transformer B, a sliding rheostat W, a voltage regulator tube DW, a fifth diode D5, a first resistor R1, a second The resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first capacitor C1 and the second capacitor C2, the input end of the rectifier circuit is connected to the AC power supply, and the anode of the rectifier circuit is connected to the first The first end of a resistor R1 is connected, and the second end of the first resistor R1 is simultaneously connected with the negative pole of the Zener tube DW, the positive pole of the fifth diode D5 and the first end of the fifth resistor R5, and the fifth diode The negative pole of D5 is connected with the first ter...
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