The circuit composition of the automatic actuator of a new type of automobile air-conditioning damper

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The circuit composition of the automatic actuator of a new type of automobile air-conditioning damper 2021-03-16

The automatic actuator circuit of the new automobile air-conditioning damper is mainly composed of a main control circuit, a control signal, a power component circuit, and an output motor circuit. The main chip is L2722, this main chip is DIP package, is an integrated circuit integrating operational amplifier and power output, and has thermal protection and short-circuit protection functions. It can directly control the forward and reverse rotation and stop of the DC motor without adding a power output circuit. Make the circuit more concise, safe and reliable, and energy saving.

The input circuit and output circuit are mainly connected to pin 8 of the main chip by the voltage signal and control signal fed back by the damper motor motor; the power supply voltage is connected to pins 6 and 7 of the main chip through a divided voltage, and the main chip is 1, 3 The pin directly outputs positive and negative voltages to control the damper motor to start forward, reverse and stop. The power component circuit is composed of protective diodes, voltage regulator tubes, triodes, and PTC components that need reverse protection. The circuit controls the rotation of the damper motor, which is simple, flexible, safe and reliable.

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