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SEMICONDUCTOR CHIPS-The controller uses original semiconductor chips from STMicroelectronics. It is tested by voltage, current and function before leaving the factory. The circuit is stable and WIDELY APPLY-The heat sink area used by this governor is more than twice that of similar products on the market,and can meet the needs of 60W-150W motors POSITIVE AND NEGATIVE CONTROL-products are equipped with positive and negative switches PWM-The dc motor controller uses PWM speed control technology, which has the characteristics of high conversion efficiency, wide speed range and stable performance GOOD QUALITY-Using high-quality chips, the filter capacitor uses monolithic capacitors, and the circuit is stable and