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Method for electrically connecting a converter to an electrical machine

A technology of inverter and electrical connection, applied in the direction of motor generator control, motor generator/starter, starter of single multi-phase induction motor, etc., can solve problems such as high voltage, achieve torque impact reduction, mechanical Parts protection, smooth start-up effects

Inactive Publication Date: 2015-08-26
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In high-speed trains driven by permanently excited synchronous machines there is the problem that high voltages are induced in the synchronous machines at high travel speeds
In unfavorable cases, this can lead to high currents being driven through the inverter, which damage the inverter

Method used

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  • Method for electrically connecting a converter to an electrical machine
  • Method for electrically connecting a converter to an electrical machine
  • Method for electrically connecting a converter to an electrical machine

Examples

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Embodiment Construction

[0034] figure 1 A schematic diagram of a rail vehicle 2 is shown, which has a motor vehicle 4 with four driven axles. Each of the axles is driven by an electric motor 6 which is respectively configured as a synchronous engine and serves as a traction engine to drive the train. All traction engines 6 are fed by a traction inverter 8. The traction inverter 8 includes an input rectifier 10 that generates the intermediate circuit DC voltage in the intermediate circuit 12 from the grid voltage of the overhead line (via multiple stages if necessary).

[0035] The four inverters 14 are electrically connected to the intermediate circuit 12. The inverters are configured as motor inverters in the form of pulse inverters in this embodiment, but other types of inverters can also be considered. The inverter 14 converts the intermediate circuit DC voltage into a three-phase AC voltage for the motor 6, wherein each of the inverters 4 supplies power to each motor 6. It is also possible that th...

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PUM

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Abstract

The invention relates to a method for electrically connecting a converter (14) to an electrical machine (6) supplied with current by the converter (14), in which method a separate electrical connection (22) between the converter (14) and the machine (6), said connection comprising multiple phases (20a, 20b, 20c), is closed. In order to close the electrical connection without causing undue wear to the material, according to the invention at least two phases (20a, 20b, 20c) of the connection (22) are closed at different times.

Description

Technical field [0001] The present invention relates to a method for electrically connecting an inverter and a motor fed by the inverter, in which a plurality of phases are included and the disconnected electrical connection is closed between the inverter and the machine. Background technique [0002] In a high-speed train driven by a permanently excited synchronous machine, there is a problem in that a high voltage is induced in the synchronous machine when the traveling speed is high. The induced voltage can be increased to 2.5 times or even higher than the intermediate circuit voltage applied on the input side of the inverter. Under unfavorable circumstances, this can result in high currents being driven through the inverter, which currents damage the inverter. [0003] In order to protect the inverter, it is known that a disconnection protection is provided between the inverter and the traction engine, through which the traction engine can be electrically disconnected from the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/00H02P27/06
CPCH02P1/029H02P1/26H02P1/46H02P27/06
Inventor 托尔斯滕·施蒂茨勒
Owner SIEMENS AG
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