One is to determine the rotational position of the output gear by feedback voltage. In this way, there is a section of carbon film on the circuit board, and the panel controls the angle through the voltage value fed back by the elastic brush. This kind of motor is generally used in mode or temperature damper, and the other is to directly control two limit points through the on-off of copper film and elastic brush. This kind of motor is generally used in the new type of return air damper.
Extended data:
Working principle of actuator:
The rotational speed of the engine can be transmitted to the output rod through two sets of gears. The main reducer is completed by planetary gear, and the auxiliary reducer is realized by worm gear, which is fixed in the central position by a group of tension springs. In the case of overload, that is, when the output rod exceeds the set torque of the spring, the central worm wheel will move axially, and the switch and signal device will be fine-tuned to provide protection for the system. ?
When the engine works, the output rod is connected with the worm wheel, and when it is operated manually, the output rod is connected with the handwheel. When the engine is not working, the motor drive can be easily disconnected, and the handwheel can be turned on simply by pressing the control lever.
Because motor drive takes precedence over manual operation, when the engine is started again, the reverse action will happen automatically. This can avoid opening the handwheel when the engine is running, which is beneficial to protect the system.
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