Please tell me the working principle and braking diagram of sew motor brake in detail.

Working principle: SEW brake is a DC excitation disc brake, and the brake coil is divided into two parts: acceleration coil and holding coil. When the current is output from the rectifier block and enters the brake coil, the acceleration coil forms a huge electromagnetic force in a very short time to overcome the potential energy of the spring to completely suck back the pressure plate (when the brake is opened), and then switches to the holding coil in a very short time to start normal work.

Working air gap is very important for correct braking, which affects the braking torque and reaction time transmitted during release and braking. Due to the wear of brake linings (which is generally low under normal circumstances), the air gap will gradually increase, so the air gap must be readjusted to the optimal value. ?

Extended data:

SEW brake release response time is particularly short, brake pad wear can be ignored, starting frequency is high, and service life is long. Once the BMG brake is released, the electronic switch immediately switches to the holding coil.

The brake magnet is sufficiently magnetized, so that the pressure disc in the attractive state can be kept in the original state safely enough. When the coil is cut off again, the demagnetization is fast, the braking distance is short, the repeatability is high and the safety is high.