Generally speaking, the motor will rely on inertial motion after cutting off the power supply, and then rotate for a while before stopping, and the lifting equipment such as hooks, or the lifting basket and other mechanical equipment can be accurately positioned; If there is a sudden power failure of the lifting equipment, the ordinary motor cannot guarantee that the rotation will stop quickly, butBrake motorCan meet this rapid braking effect, the following and Senli motor Xiaobian together to understand the next.
Brake motors generally have two braking methods, one is mechanical braking, and the other is electromagnetic braking. Mechanical braking is the use of mechanical devices to cut off the power after the motor quickly stop rotating, the common method is electromagnetic lock braking, also known asElectromagnetic brake motor.
The working principle of electromagnetic brake motor is that the motor is connected to the power supply, while the electromagnetic brake coil is also powered, the armature is drawn, and the brake shoe is separated from the brake wheel to overcome the tension of the spring, and the motor runs normally. Disconnect the switch or contactor, the motor loses power, while the electromagnetic lock coil also loses power, the armature is separated from the iron core under the action of spring tension, and the brake shoe tightly hugs the brake wheel, the motor is stopped by braking.
The characteristic of electromagnetic lock braking is that the mechanical braking mainly uses electromagnetic lock braking and electromagnetic clutch braking, both of which generate magnetic field after the electromagnetic coil is energized, so that the static iron core generates enough suction to absorb the armature or moving iron core(The moving core of the electromagnetic clutch is sucked, and the dynamic and static friction plates are separated)To overcome the tension of the spring and meet the requirements of the work site.
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