Disc brake braking circuit that can eliminate power-off residual magnetism delay

Abstract

The invention discloses a disc brake braking circuit capable of eliminating power-off residual magnetism delay, including a power supply circuit, a rectification and voltage dividing circuit, an electromagnetic starting circuit, a demagnetization circuit and a brake, wherein the demagnetization circuit includes a first Two AC contactors and capacitors. After the circuit is connected to the contacts of the AC contactor, it is then reversely connected to the positive and negative poles of the input end of the brake. In the present invention, when the power is turned on, the capacitor continues to charge, and after the power is lost, because the output of the capacitor is opposite to the positive and negative poles of the brake, in this way, the capacitor outputs a voltage when the power is suddenly lost, so that the DC electromagnet in the brake If the current is offset, the residual magnetism in the brake can be eliminated immediately, the hysteresis phenomenon can be overcome, the brake can brake quickly, and the stability and safety of equipment operation can be improved.

Description

technical field [0001] The invention relates to a disc brake braking circuit capable of eliminating power-off residual magnetism delay. Background technique [0002] When the disc type power failure protection brake brakes when the power is lost, the DC electromagnet has hysteresis, and the brake lags behind. The disc brake is used as the braking device of the pumping unit, and the delayed braking may cause safety accidents. For example, when the pumping unit is mounted, the counterweight end is lifted unilaterally, and the delayed braking causes the counterweight to fall, which brings safety hazards and damage to the counterweight box to the staff near the pumping unit equipment; The rod end and the counterweight end slide down on the heavier side, which is easy to burn out the components of the control equipment. [0003] In order to solve the above problems, the reaction time of disc brakes is eliminated, and the reverse voltage is applied after the brakes are powered o...

AI Technical Summary

Problems solved by technology

For example, when the pumping unit is mounted, the counterweight end is lifted unilaterally, and the delayed braking causes the counterweight to fall, which brings safety hazards and damage to the counterweight box to the staff near the pumping unit equipment; The rod end and the counterweight end slide down on the heavier side, which is easy to burn out the components of the control equipment, etc.

Images