Silent designing: built in high power cooling fan with tranquil motor, running noiseless.
独特超静音设计：特殊冷却风扇马达设计，运转安静无噪音。
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The controller processes the motor output signal digitally, and provides suitable current and frequency to the motor to make it silent and efficient, hence enhance the power of the motor.
In the process of the silent chain drive used as the timing transmission in motor, the chain always suffers from meshing impact and waving for polygon action.