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Brake closing follow current circuit, brake closing system and brake closing follow current control method

A technology of freewheeling circuit and braking system, which is applied to the parts of the deceleration device, etc., can solve the problems of prolonging the release time of the brake, reducing the release time, and increasing the resistance value of the freewheeling resistance, so as to solve the problem of noise and release time, and speed up Current drop speed, the effect of slowing down the current drop speed

Active Publication Date: 2019-05-24
HITACHI ELEVATOR CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

During the implementation process, the inventor found that reducing the release noise of the brake and reducing the release time are contradictory without changing the mechanical structure of the brake: in order to reduce the release noise of the brake, the resistance value of the freewheeling resistor should be reduced, resulting in The current of the brake coil decreases slowly, prolonging the release time of the brake, which further leads to an increase in the braking distance of the motor equipment of the brake
On the contrary, in order to reduce the release time and the braking distance of the motor equipment, the resistance value of the freewheeling resistor is increased to make the current of the brake coil drop faster, resulting in louder brake release noise
However, in the face of the aforementioned contradictions, there is still no effective solution. That is to say, the traditional brake control method has the problem of not being able to reduce the maximum noise of the brake release and shorten the release time.

Method used

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  • Brake closing follow current circuit, brake closing system and brake closing follow current control method
  • Brake closing follow current circuit, brake closing system and brake closing follow current control method
  • Brake closing follow current circuit, brake closing system and brake closing follow current control method

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application. It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated with it, or there may be an intermediate element at the same time, that is, it may also be indirectly connected to another element .

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the pur...

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Abstract

The invention relates to a brake closing follow current circuit, a brake closing system and a brake closing follow current control method. The brake closing follow current circuit comprises a first follow current module and a second follow current module, which are connected in parallel. The equivalent resistance value of the first follow current module is smaller than that of the second follow current module. The positive ends of the first follow current module and the second follow current module are connected to the positive end of the brake closing coil. The negative ends of the first follow current module and the second follow current module are connected to the negative end of the brake closing coil. The first follow current module is connected when receiving a closing control signalwhen a brake starts to be released, performs the current following of the brake closing coil and is disconnected when receiving an open circuit control signal after a brake shoe impacts a wheel surface of a main unit. The second follow current module is used for carrying out current following of the brake closing coil after the first follow current module is disconnected. Through the design of the double follow current loops, the resistance of the follow current loops can be adjusted in the brake release process, the maximum noise of brake release is effectively reduced, and the release timeis effectively shortened.

Description

technical field [0001] The present application relates to the technical field of motor braking, in particular to a brake freewheeling circuit, a brake braking system and a brake freewheeling control method. Background technique [0002] Different brakes have different parameters such as mechanical structure, working current, coil inductance and coil resistance. Each brake control device needs to be matched with different freewheeling resistors to meet the requirements for brake coil freewheeling. During the implementation process, the inventor found that reducing the release noise of the brake and reducing the release time are contradictory without changing the mechanical structure of the brake: in order to reduce the release noise of the brake, the resistance value of the freewheeling resistor should be reduced, resulting in The current of the brake coil decreases slowly, prolonging the release time of the brake, which further leads to an increase in the braking distance of...

Claims

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Application Information

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IPC IPC(8): H02P3/02
Inventor 郭志海刘俊斌赖志鹏郭威
Owner HITACHI ELEVATOR CHINA
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