Elevator brake is an important safety device, it's safe, reliable and safe operation of the lift to ensure one of the factors. The role of the brake can be summarized in the following two: (1) enable the elevator to run automatically when the car cut off the power supply system stop. (2) The elevator stops running, the brakes should be able to guarantee 125% of rated load in the circumstances, so maintain a stationary car, the location change.
    China's new "elevator manufacturing and installation of the safety norms" GB7588-2003 has been promulgated, including the biggest change on the braking system is to GB7588-1995 section 12.4.2.1 in the article "Note: This category can also be suspended." This sentence deleted. Then, after 2004 the production of elevators, its braking system must meet the requirements of 12.4.2.1: When the car containing 125% of rated load and rated speed down the run, the operating brakes should enable the tractor to stop running . In this case, the car's deceleration should not exceed the safety gear or car movements generated by the impact speed buffer. All involved in the brake wheel or brake disc braking force applied mechanical components should be divided into two groups to install. If a component does not work, there should still be sufficient braking force to contain the rated load at rated speed slowing down the car down. Electromagnetic coil core is regarded as mechanical parts, while the coil is not.