Reliable electric brake for a synchronous engine

A technology of synchronous motors and mechanical brakes, applied in the field of rail vehicles, can solve problems such as complicated converter adjustment and difficult error-free control, and achieve the effects of increased complexity, low complexity, and simple safety

Active Publication Date: 2017-08-29
SIEMENS MOBILITY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the regulation of the converter based on its multiple input parameters and internal calculation steps is very complex
For this reason, it is difficult to achieve an error-free control for all possible vehicle and operating states

Method used

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  • Reliable electric brake for a synchronous engine
  • Reliable electric brake for a synchronous engine
  • Reliable electric brake for a synchronous engine

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Embodiment Construction

[0032] figure 1 shows the respective electrical connections at the phase connectors 20 with the value R 1 The braking torque M in the case of resistor 4 Br Curves against rotational speed. For values ​​with value R 2 The second resistor 4, where R 2 1 , whose curve is as figure 2 shown. Obviously, for a smaller resistance 4 a braking torque M occurs at a smaller speed Br the maximum value. At zero rotational speed, no braking torque M can be achieved at the synchronous motor 2 independently of the resistance value Br . In order to be able to apply a braking torque to the drive system in the stationary state, an additional brake, for example a mechanical brake, must be provided in the drive system 1 .

[0033] image 3 shows the first braking torque M Br1 The curve and the second braking torque M Br2 , where the first braking torque occurs when the phase connections 20 of the synchronous machine 2 are short-circuited, and in the case of the second braking torque, t...

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PUM

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Abstract

The invention relates to a method for reliably controlling a braking torque of a drive system (1). In order to be able to reliably control the braking torque, it is proposed that the drive system (1) has a synchronous machine (2) and a changeover apparatus (3), wherein the synchronous machine (2) has phase connections (20), wherein the changeover apparatus (3), in a first state, connects the phase connections (20) to one another in such a way that a first braking torque (MBr1) is produced at the synchronous machine (2) and, in a second state, connects the phase connections (20) to one another in such a way that a second braking torque (MBr2) is produced at the synchronous machine (2), wherein the changeover apparatus (3) changes over between the states in such a way that a prespecifiable braking torque (M*) is produced at the synchronous machine (2) on average over time, wherein, in order to produce the first braking torque (MBr1), the phase connections (20) of the synchronous machine (2) are short-circuited, and wherein, in order to produce the second braking torque (MBr2), the phase connections (20) of the synchronous machine (2) are connected to at least one resistor (4). The invention further relates to a drive system (1) for carrying out the method, and also to a vehicle, in particular to a rail vehicle, comprising a drive system (1) of this kind.

Description

technical field [0001] The invention relates to a method for safely controlling the braking torque of a drive system with a synchronous electric machine. The invention also relates to a drive system and a vehicle, in particular a rail vehicle, having such a drive system. Background technique [0002] A drive system with an inverter and a motor, also referred to as an electric machine, is able to deliver the desired torque very precisely on the shaft of the motor. This concerns not only the torque for accelerating the motor, but also the braking torque for braking the motor. [0003] This fact is precisely taken into account below on the basis of the example of a rail vehicle. Today, rail vehicles are mostly electrically driven. For this purpose, the motor can accelerate the vehicle, but can also brake it. During braking by the motor, electrical energy is fed back, which is then conducted into the power supply network or dissipated via a braking resistor. In addition to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P3/22B60L3/10B60L7/00B60L7/06B60L7/08B60L7/26B60L11/18B60L15/00B60L15/20
CPCB60L50/51B60L3/108B60L7/003B60L7/06B60L7/08B60L7/26B60L15/007B60L15/2009H02P3/22B60L2210/40B60L2220/14B60L2240/80B60L2240/12B60L2240/423B60L2200/26B60L2250/24Y02T10/64Y02T10/70Y02T10/72H02P6/24
Inventor 格拉尔德·阿姆勒汉斯·贝格纳
Owner SIEMENS MOBILITY GMBH
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