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Circuit using back electromotive force for speed control

Source: InternetPublisher:明天见 Keywords: electric motor Updated: 2020/04/18

37. A<strong>circuit</strong> that uses counter<strong>electromotive</strong> potential for speed<strong>control</strong>.gif

Circuit using back electromotive force for speed control

Shown is a circuit that uses back electromotive force for speed control, which can achieve steady speed control. When the motor
rotates, due to the effect of electromagnetic induction, the windings of the motor will generate back electromotive force. The higher the speed of the motor , the greater the back electromotive force. In the drive circuit , the back
electromotive force is converted into negative feedback voltage through the transistor, and the power supply transistor of the motor is controlled through the error detection amplifier .

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