The thermal contraction film machine power supply control circuit includes a temperature control circuit and a transmission power supply control circuit. The temperature control circuit is composed of a temperature controller and a relay. The power supply control circuit of the transmission mechanism is mainly composed of a voltage transformer rectifier circuit and a voltage regulation circuit. The special feature is that the voltage regulation circuit is composed of a triac, an adjustable potentiometer, a fixed resistor, Capacitor composition. In addition, a compensation circuit is also provided. The compensation circuit is composed of a switch circuit and a compensation power supply. Compared with the prior art, this kind of power supply control circuit has the operating speed of the transmission mechanism that is basically not affected by the power condition of the electric heating rod, so that each item can obtain the same thermal energy treatment.
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