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Open loop or closed loop can be implemented for speed control application for DC motors. The closed loop or often called servo controller or feedback control gives the best performance. It is because the loop will maintain the actual speed to follow the reference. For example in Personal Computer’s fan speed control, an open loop [...]

The following circuit is a PWM motor control provides many controls for the DC motors. The DC motor can be controlled to rotate forward, reverse, or break until it stops. Figure below shows the schematic : MOSFETS bridge is used in the circuit to drive the motor. It is controlled by some logic gates and [...]