D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
D06F 58/28 (2006.01) H02P 1/42 (2006.01) H05B 1/02 (2006.01)
Patent
CA 2716828
The invention discloses a control circuit for a single-phase AC motor of a dryer, including an electronic starting circuit including a starting control unit, a first drive circuit, and a bidirectional triode thyristor. It further includes a second drive circuit, and a mechanical switch K, the mechanical switch K is serially connected to an electrical heating wire, and connected to the AC input, the starting control unit is connected to a control end of the mechanical switch K via the second drive circuit, and the first drive circuit and the second drive circuit are interlocked with each other whereby enabling the mechanical switch K to be switched off as the bidirectional triode thyristor is conducting, and the mechanical switch K to be switched on as the bidirectional triode thyristor is cut off. The invention features simple circuit structure and low cost, and switching and drive control are implemented by way of controlling switch-on/off of the mechanical switch via the electromagnet coil, which makes control simple and convenient; as the drive circuit is powered on, current in the circuit, and heat value and loss of the electronic power switch are comparatively small.
Herman & Millman
Zhongshan Broad-Ocean Motor Manufacturing Co. Ltd.
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