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Secure device for detecting electric braking insufficiency and switching to a secure brake

A technology of safety brakes and safety brakes, which is applied in the field of rail vehicles and can solve problems such as inability to adjust and low grades

Inactive Publication Date: 2009-03-11
ALSTOM TRANSPORT TECH SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device has a disadvantage: the force / velocity characteristic of the device depends only on the characteristics of the engine or the value of the selected braking resistance and therefore cannot be adjusted, especially it may lead to excessively high levels of force at high speeds resulting in excessive High level of sticking force or too low level of force at low speed
Means for improving said force / velocity characteristics are described in the patent application of Alstom Transport entitled "Electrically Safe Braking Device with Permanent Magnet Motor and Braking Torque Control", but it is necessary to add additional equipment

Method used

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  • Secure device for detecting electric braking insufficiency and switching to a secure brake
  • Secure device for detecting electric braking insufficiency and switching to a secure brake
  • Secure device for detecting electric braking insufficiency and switching to a secure brake

Examples

Experimental program
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Effect test

Embodiment Construction

[0049] Figure 1 shows a first embodiment of a braking system, referred to as a safety braking system and associated with an electric traction chain 1 of a rail vehicle.

[0050] The braking system comprises a first electric service brake integrated in the electric traction chain 1 and in this case a mechanical second safety brake 2 .

[0051] The braking system also comprises means 3 for monitoring the braking performance of the first brake using the current intensity measurement data, detection means 4 enabling a decision to switch from the first brake to the second brake when the intensity measurement data exceeds a predetermined threshold, and Means 5 for transmitting conversion instructions.

[0052] The drag chain 1 is powered with electrical energy by a catenary arrangement (or third rail) 6 referenced to a grounded ground wire 7 at high voltage.

[0053] The electric traction chain 1 includes a pantograph (or carriage) 8 for obtaining electric energy from the catenary ...

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Abstract

The invention relates to a system for detecting insufficient electric braking and converting to a safe brake. The system is used for a vehicle drawn by electric power, in particular for a rail vehicle provided with a drawing chain (1). The system comprises a first electric unsafe brake and a second safe brake (2, 117) integrated in the drawing chain (1). The system is characterized in that the system comprises a component (20) for converting from the first brake to the second brake (2, 117), a device (3) monitoring braking performance of the first brake by using data for measuring current intensity, a judging device (4) for converting the first brake into the second brake (2, 117) when a predetermined threshold value (240) is surpassed, and a device (5) transmitting conversion instructionto at least one converting component.

Description

technical field [0001] The invention relates to a device for detecting insufficient electric braking and switching to a safe braking. The invention is used in electrically driven vehicles, such as rail vehicles. [0002] The safety brake system guarantees that the required braking force is generated in a very reliable manner. Background technique [0003] In the field of transportation, there are mainly two types of braking operations: service braking and emergency braking. [0004] The service brake operation is the most common during operation. Common braking can be adjusted between the minimum force value close to 0 and the maximum force value. Based on the common braking of trains, it can be decomposed into various modes: pure electric braking, pure mechanical braking or combined electric and mechanical braking. Service braking performs all "normal" stopping and deceleration operations of the train as well as braking operations for staying on slopes. However, servic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/02B60L7/24B60T17/18
CPCB60L2200/26B60L7/06B60L3/0076H02P3/22B60L7/003Y02T10/642H02P6/24B60L7/22Y02T10/64B61H9/00B61H11/00
Inventor T·若巴尔
Owner ALSTOM TRANSPORT TECH SAS
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