First, implementation principle

The realization principle of motor reverse braking is to use the back electromotive force of the motor to brake the motor motion. When the motor is running, the electromagnetic field generated by the motor will produce a magnetic flux, and the motion of the motor will also produce a magnetic flux in the magnetic field. These two changes in magnetic flux cause the motor to generate a back electromotive force that is directed in the opposite direction of the motor's motion.

When the motor stops running, this back electromotive force will disappear, and the motor has no braking force. However, we can realize the braking of the motor by changing the circuit of the motor so that the back electromotive force of the motor becomes a braking force.

2. Implementation method

There are two ways to realize motor reverse braking, one is to directly change the motor circuit into reverse braking circuit, and the other is to realize reverse braking through an external circuit.

1. Direct reverse braking circuit

Direct reverse brake circuit is to change the motor circuit to reverse brake circuit, this method is relatively simple, only need to exchange the two windings of the motor can be done.

In the direct reverse brake circuit, when the motor stops running, the electric potential of the motor will produce a counter-electromotive force, which will flow back through the motor circuit to the power supply, thus producing a braking force, so that the motor stops moving.

2. External reverse brake circuit

The external reverse brake circuit is to realize the reverse brake through the external circuit. This method is more complicated and needs to use some special circuit elements.

In the external reverse brake circuit, we need to use a capacitor and a resistor, and connect them to the circuit of the motor. When the motor stops running, the electric potential of the motor will create a counter-electromotive force, which will pass through the capacitors and resistors, thereby creating a braking force that causes the motor to stop moving.

Motor reverse braking is a common braking method, which uses the back electromotive force of the motor to stop the motion of the motor. There are two ways to realize motor reverse braking, one is to directly change the motor circuit into reverse braking circuit, and the other is to realize reverse braking through an external circuit. In practical application, we need to choose the appropriate method to realize the motor reverse braking according to the specific situation.