The automatic actuator of automobile air-conditioning damper includes DC motor, gear, worm, brush, circuit board, electronic components, control signal line, power line; it is characterized in that the actuator is composed of the main control part of the circuit, the power component part, and the mechanical transmission part. The motor part is composed; the mechanical transmission part is composed of a worm, a gear, and a gear with two brushes as the output transmission interface; the power component part is composed of a diode, a triode, a resistor, a voltage regulator tube and a current protection PTC composition of the role;
The main control part is composed of a main chip and an input signal conversion circuit, which is composed of integrated block L2722, a control signal, a feedback signal of the damper motor, a power supply voltage signal, and an input conversion circuit. The control signal is connected to the main chip through a resistor R1 8 feet, the feedback signal of the damper motor is connected to the 8 feet of the main chip through resistor R9;
The power supply voltage is connected to pin 2 of the main chip through the protection diode D1, protection device PCT, voltage regulator tube, and triode, and connected to the 6 pins and 7 pins of the main chip through resistors. The 1 pin and 3 pins of the main chip change according to the input signal. After the corresponding voltage is output, the motor is controlled to rotate forward and backward, and the gear and output gear are driven by the worm on the motor, and the cooperation of the gear and the air door driving member drives the air door to open or close.
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