1, mechanical brake is the brake, is the electric brake, also known as the brake.
2, energy consumption braking. Refers to the dc motor in operation suddenly disconnects the armature power supply, and then connects the braking resistance in the armature circuit, so that the inertia energy of the armature winding is consumed on the resistance, so that the motor can brake quickly. Due to the voltage and input power are 0, so the brake balance, simple circuit;
3. Reverse braking. In order to achieve fast stop, suddenly the armature voltage of the motor is inversely connected, and in the armature circuit series resistance, known as the power supply reverse braking. During the braking, the power supply is still input power, and the kinetic energy and electromagnetic power released by the load are consumed on the resistance, which is suitable for the occasion of fast stop and reversal, and has a large impact on the equipment.
Reverse connection braking: when the forward power supply is cut off, the reverse power supply is added immediately to make the motor stop quickly. When the motor speed drops to zero, the "reverse connection relay" installed on the motor shaft immediately sends a signal to cut off the reverse power supply and prevent the motor from really reversing.
4. Reverse pull reverse connection brake is suitable for lowering heavy objects at low speed. When braking, a large resistance is inserted into the circuit, so that the armature current becomes smaller and the electromagnetic torque becomes smaller. Due to the high resistance in series, different running speeds can be obtained by changing the value of the resistance.
5, feedback braking. Under certain conditions, the motor running under electric state will be dragged by the load to run. At this time, N> N0, Ea>U, Ia reverse, and the motor changes from drive to brake.