The invention discloses a hoisting machinery braking method which is used for detecting the braking effect in the working process and can prevent hook gliding from happening to hoisting machinery. The method includes the following steps that the change amount of a rotating shaft of a motor is obtained after braking is started; whether the change amount is larger than a preset change amount threshold value or not is judged one or more times; if the change amount is larger than the preset change amount threshold value, the motor is controlled to output the torque for making a load instantly suspended, and the current change amount of the rotating shaft of the motor is obtained again; braking is finished if the change amount is not larger than the preset change amount threshold value; when the preset number of braking times is achieved, if the change amount is larger than the preset change amount threshold value, the motor is controlled to output the torque for making the load suspended, and braking is finished if the change amount is not larger than the preset change amount threshold value; and after the braking time is larger than the preset time threshold value and the change amount is smaller than the change amount threshold value, braking is finished. By means of the process of the multiple times of judgment, the problem that braking signals and braking actions are not synchronous due to mechanical matching or electrical faults can be solved, and misjudgment is not prone to happening.
Hoisting machinery braking method and hoisting machinery braking device
2015-12-09
Patent
Electronic Resource
English
IPC: | B66D Haspeln , CAPSTANS |
Engineering Index Backfile | 1945
|Control method and device for hoisting machinery, controller and hoisting machinery
European Patent Office | 2021
|Hoisting machinery operation control method and system and hoisting machinery
European Patent Office | 2023
|Active steering system for hoisting machinery and hoisting machinery
European Patent Office | 2023
|