Automobile brake microswitch

Daily in the use of switch keys, it should be noted that there can be no water droplets on the surface of the keys, once accidentally let water vapor into the switch, not only affect the sensitivity of the shrapnel, and may cause short circuit leakage, and the human body accidentally contacted, it may cause electric shock and other safety accidents.

Therefore, do not touch the micro switch with wet hands to avoid contact with water vapor.

Secondly, when using electrical appliances, if the button cap of the tap switch falls off, please pay attention not to touch the exposed metal keys, because people are conductors themselves, touching the metal part of the key of the power switch with their hands, there will be a dangerous accident. And the cap off is generally caused by its fixed instability, if non-technical personnel do not randomly go to repair the switch cap back, which is improper operation, if touch the bare metal shrapnel touch switch, which will cause electric shock accident.

The external mechanical force acts on the action reed through the transmission element (press pin, button, lever, roller, etc.). When the action reed is displaced to the critical point, instantaneous action is generated, so that the moving contact at the end of the action reed is quickly connected or disconnected from the stationary contact.

There is a Hall switch at the brake handle. When braking, the Hall switch gives a signal voltage to the controller. The motor stops supplying power, the brake handle is released, and the motor recovers normal power supply.

There is a normally closed switch at the brake handle. When braking, the microswitch springs up, and the brake signal is closed (low level and high level brake, and low or high voltage is given to the brake signal). The signal is transmitted to the controller, and the MCU gets the brake signal and stops output, that is, stops power supply to the motor.

Brake is divided into two modes: simple brake power off and brake back charging (EABS). The former just cuts off the power, while the latter will recover the energy from the inertia of the car through the control of the single chip microcomputer after the power failure, and charge the level (reverse charge), that is, give the motor a reaction force to help the motor slow down as soon as possible. It's called a flexible brake system.