JD-6 Type Electric Motor Synthesized Protector Principle And Troubleshooting Circuit

Published:2011/7/25 8:00:00 Author:Robert | Keyword: Electric Motor, Synthesized, Protector, Principle, Troubleshooting | From:SeekIC

The JD-6 type electric motor synthesized protector's electrical principle schematic is shown in picture 1 and the assorted wiring with the electric motor is shown in picture 2. In picture 1 the transformer T's secondary side's 15V voltage would be send to the diodes bridge rectifier (D1~D4) and the capacitor C1 for filter. Then it would get about 15V DC voltage which would be the working voltage for the protector. The dual-time-base circuit (NE556) is the main control chip. When the motor is running the current transformer 1TA and 3TA, which are in series with the electric motor's main loop circuit, would be used to detect the motor's running current. After the half-wave rectifier in D5 and filter in C2 and currrnt limiting in R1, the 1TA's secondary side's current signal would make the triode V1 in open mode. As the same way the 2TA, 3TA's current signal would make the triode V2 and V3 in open mode separately.



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