Method and device for detecting holding brake force
A technology of braking force and brake device, which is applied in the direction of hoisting device, transportation and packaging, elevator, etc., can solve the problems of motor rotation, no consideration, and inability to accurately detect the braking force of the brake.
Active Publication Date: 2017-03-15
SHANGHAI STEP ELECTRIC +1
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Problems solved by technology
In these schemes, the torque output by the motor is a fixed value. If the braking force of the brake is insufficient, causing the motor to rotate and the car to move, then the car starts to move to the point where the displacement exceeds the threshold set by the controller. During this period of time, the motor may generate a large speed, and there is a certain risk
In addition, in some of the schemes, when a torque of a certain size and direction is applied to the motor, the influence of the weight on the braking force detection of the brake in the actual working condition of the elevator is not considered, so the brake force cannot be accurately detected. available braking force
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized.
[0024] The first embodiment of the present invention relates to a method for detecting braking force of a brake. The specific process is as figure 1 shown.
[0025] In step 101, all brake devices are controlled to close, and in the elevator idle state, the elevator is controlled to stop responding to external calls, and all brake devices ...
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The invention relates to the field of electromechanical control, and discloses a method and device for detecting holding brake force. According to the mode of execution, when all holding brake devices are in a close state, a position controller outputs a given speed according to the safe displacement smaller than a preset threshold and the displacement feedback of a motor; then the motor outputs a first motor torque in accordance with the given speed, and when the first motor torque reaches a first upper limit, the motor torque of the first upper limit is maintained within preset time; whether the motor rotates or not is judged according to the displacement feedback of the motor within the preset time, and if the motor rotates, the holding brake force is abnormal. In the mode of execution, whether the holding brake force meets the requirements or not can be detected accurately, the effect that the first motor torque output by the motor is still controllable even though the brake force is insufficient to cause motor rotation in the detecting process of the holding brake force can be guaranteed, and therefore safety and reliability of the detecting process are ensured.
Description
technical field [0001] The invention relates to the field of electromechanical control, in particular to a method and device for detecting braking force of a brake. Background technique [0002] With the increasingly widespread application of elevators, more and more people pay attention to their safety issues. Among them, the brake of the elevator provides braking force to keep the car stationary when the elevator stops running, which is an important device to ensure the safe operation of the elevator. During the long-term use of the elevator, the surface of the brake will gradually wear out due to frequent friction, which will gradually reduce the braking force it can provide. Therefore, it is necessary to regularly check whether the braking force of the elevator's brake meets the requirements. less work. [0003] In the process of realizing the invention, the inventor of the present application found that the current technical solutions for detecting the braking force of...
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Login to View More IPC IPC(8): B66B5/00B66D5/02
CPCB66B5/0093B66D5/02
Inventor 金辛海陈伟蔡鹏飞王文宇嵇尚华葛越张祺
Owner SHANGHAI STEP ELECTRIC