Ventilation motor temperature control circuit

Published:2011/5/9 22:00:00 Author:TaoXi | Keyword: Ventilation motor, control circuit | From:SeekIC

Related components PDF download: BC261BC107B This circuit can be used to control the electrical insulation heating device. The sensor uses the 100kΩ thermistor. And this sensor controls the shaded pole motor running fast or running slow or stop running. The SCR's (which controls the motor's open telegram or power outage) trigger pulse is discharged by the transistor which is controlled by the temperature bridge circuit. Once the capacitor's charging voltage reaches the turn circuit's (compose of the transistor) turn voltage, the SCR will conduct and the motor starts working, the capacitor starts discharging. We control the voltage which is added on the ventilation motor according to the sensor's temperature and the time of the half-cycle conduction, to achieve the ratio adjustment.



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