Current three-phase motor phase-failure protection circuit diagram

Published:2011/8/2 2:39:00 Author:Rebekka | Keyword: Current three-phase motor, phase-failure protection | From:SeekIC

The production of transformer Tl ~ T3 can use the ring ferrite core which is easy to be purchased on the market. It uses Φ0.25mm high-strength wire wound with 150 to 250 turns. The number of the turns is determined by the motor power. If the motor power is low, you can wound more turns. The power supply line passes the ring. The capacitors C1 ~ C3 use the 10μF/25V electrolytic capacitors. C4 uses 0.1μF/63V ceramic chip capacitor; C6 uses 470μF/25V electrolytic capacitor; C5 is the interference absorption capacitor, when the action is too sensitive, it can increase the capacitance value of C5, conversely it will reduce the value of C5, its range is 4.7 ~ 33μF/25V. Resistors Rl = R2 = l.2kΩ, R4 = 390kΩ, R5 = 680kΩ, R6 = 15kΩ, R7 = 2kΩ, the nominal power resistor is 1/8W RJ. Zener VD11's regulator value is about 8V. Other diodes use 1N4004.



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