Subsectional braking force controlling method based on velocity

A control method and braking force technology, applied in the control drive, railway braking system, electric vehicle, etc., can solve the problems of reduced electric braking capacity, increased brake pad wear and maintenance cost, etc., to reduce wear and later maintenance. cost, avoid inconsistent effects

Active Publication Date: 2017-12-15
CRRC NANJING PUZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. Due to the constant power characteristics of the motor at high speed, the electric braking capacity is reduced, resulting in the air brake being supplemented all the time during high-speed braking, which increases the wear and maintenance cost of the brake pads

Method used

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  • Subsectional braking force controlling method based on velocity
  • Subsectional braking force controlling method based on velocity
  • Subsectional braking force controlling method based on velocity

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0042] In the present invention, the speed is divided into a low-speed section of 0-95km / h and a high-speed section of 95-120km / h.

[0043] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a speed-based section braking force control method includes the following steps.

[0044] Step 1, draw the equivalent deceleration curve of electric braking.

[0045] First take the speed V as the horizontal axis, and the value range of the speed is 0-120km / h; then take the deceleration a as the vertical axis, draw as image 3 The electric braking equivalent deceleration curve under the electric braking constant power characteristic shown.

[0046] 100% electric braking force is used when drawing the electric braking equivalent deceleration curve, that is, the maximum electric braking force is used.

[0047] In the el...

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PUM

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Abstract

The invention discloses a subsectional braking force controlling method based on velocity. The subsectional braking force controlling method comprises the steps that a deceleration and velocity curve during 100% braking level is drawn; deceleration and velocity curves during other braking levels are drawn; velocity signals are collected; the baking levels are applied; and deceleration is determined, and electric braking force is calculated and applied. According to the subsectional braking force controlling method based on velocity, the power curve of electric braking is taken as the basis of sectional braking force control, through the velocity signals output by a velocity sensor and vehicle baking applying level, braking controlling is automatically conducted by a braking system according to corresponding deceleration on the braking curve, and the problems of gliding of a high-speed section and excessive abrasion can be solved.

Description

technical field [0001] The invention relates to the field of rail vehicle braking system design, in particular to a speed-based segmented braking force control method. Background technique [0002] As the operating speed of domestic subway vehicles continues to increase, some cities have opened intercity lines with an operating speed of 120km / h. However, at present, vehicle braking is controlled by a constant braking force application. In this way, there will be the following problems: [0003] 1. Since the wheel-rail adhesion coefficient decreases with the increase of speed, the wheel-rail adhesion coefficient of the train decreases in the high-speed section. At this time, the control method with constant braking force is prone to slide. [0004] 2. During the domestic 120km / h subway sliding test, it was found that the number of sliding times in the speed range from 95km / h to 110km / h is relatively high, and the braking distance is significantly extended by the high-speed tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61H11/14B60L15/20
CPCB60L15/2009B60L15/2045B61H11/14Y02T10/72
Inventor 徐红星肖飞曾要争张潜鄢艳丽朱建安刘兵
Owner CRRC NANJING PUZHEN CO LTD
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