The braking methods of DC motors include mechanical braking, regenerative braking, energy consumption braking, reverse braking, and feedback braking.
1. Mechanical braking is the holding brake, which is an electric holding brake, also known as a brake.
2. Energy consumption braking. It refers to the sudden disconnection of the armature power supply in a running DC motor, followed by the insertion of a braking resistor in the armature circuit, which consumes the inertia energy of the armature winding on the resistor, causing the motor to brake quickly. Due to the zero voltage and input power, the braking is balanced and the circuit is simple;
3. Reverse braking. In order to achieve fast parking, suddenly reversing the armature voltage of the running motor and connecting a resistor in series in the armature circuit is called power reverse braking. During the braking period, the power supply still inputs power, and the kinetic energy and electromagnetic power released by the load are consumed in the resistor, which is suitable for situations where the equipment is quickly stopped and reversed, and has a large impact force on the equipment.
Reverse braking: After cutting off the forward power supply, immediately apply the reverse power supply to quickly stop the motor. When the motor speed drops to zero, the "reverse relay" installed on the motor shaft immediately sends a signal to cut off the reverse power supply and prevent the motor from actually reversing.
4. Reverse pull reverse reverse brake is suitable for low-speed lowering of heavy objects. When braking, a large resistor is connected in series in the circuit, causing the armature current to decrease and the electromagnetic torque to decrease. Due to the large serial resistance, different lowering speeds can be obtained by changing the value of the serial resistance.
5. Feedback braking. An electric motor operating in an electric state may experience a situation where it is driven by a load under certain conditions, resulting in N>n0, Ea>U, and Ia reversing, causing the motor to switch from driving to braking.