Fully automatic washing machine motor drive schematic diagram

Fully automatic washing machine motor drive schematic diagram

Shown is the schematic diagram of the fully automatic washing machine motor drive circuit . This circle is the practical circuit of Narcissus brand XQB30-III washing machine motor drive .     The control circuit is composed of 4 bidirectional thyristors, 4 drive transistors and a control chip. When a certain transistor has a high level, it is turned on, the corresponding thyristor is triggered, and the controlled electromagnetic circuit moves. When washing starts, the water level switch connected to the ◎ pin of the microcomputer program controller works together with the water inlet solenoid valve at the (chimney pin) to control the amount of water injected into the washing tub. When the water level reaches the predetermined level, the microcomputer program controller will The water inlet solenoid valve controls the transistor VT6 to cut off and stop injecting water into the washing tub. The microcomputer program controller controls the transistor VT3 or VT4 of the @ or @ pin to conduct, causing the motor to rotate forward or reverse to start washing clothes. Washing clothes After the completion of the microcomputer program controller, the transistor VT3 or VT4 on the pin is cut off, causing the motor to stop running. The computer program controls the transistor VT5 on the pin to conduct, and the drain solenoid valve starts to work. When the water is drained to the end At one minute, the transistor VT7 and V I2 on the microcomputer program controller @ pin are turned on, and the buzzer starts to buzz.