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Traction converter with secondary filter circuit

A traction converter, secondary filtering technology, applied in the direction of AC power input conversion to AC power output, electrical components, AC motor control, etc., can solve the abnormal operation of traction converter, affect the operation of traction motor, and voltage waveform distortion And other issues

Inactive Publication Date: 2016-06-29
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rectified output voltage of the rectifier will still contain a large number of second harmonic components, which will cause voltage waveform distortion, which will not only cause damage to other devices in the converter, but also cause damage to the traction converter. The operation is abnormal, affecting the operation of the traction motor

Method used

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  • Traction converter with secondary filter circuit
  • Traction converter with secondary filter circuit
  • Traction converter with secondary filter circuit

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Embodiment Construction

[0014] figure 1 It is a schematic diagram of the circuit structure of Embodiment 1 of the traction converter of the present invention, as shown in figure 1 As shown, the traction converter includes:

[0015] A rectifier circuit 1, a secondary filter circuit 2 and an inverter circuit 3 connected in sequence;

[0016] Specifically, the rectifier circuit 1 includes at least one four-quadrant rectifier connected in parallel, and the two output terminals of each four-quadrant rectifier are respectively connected to the positive terminal VDC+ and the negative terminal VDC- of the bus.

[0017] In this embodiment, taking two four-quadrant rectifiers as an example, the two four-quadrant rectifiers are denoted as 11 and 12 respectively. The first four-quadrant rectifier 11 and the second four-quadrant rectifier 12 are connected in parallel, and the first output terminal E1 and the second output terminal F1 of the first four-quadrant rectifier 11 are respectively connected to the posi...

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Abstract

The invention provides a traction converter with a secondary filter circuit. The traction converter comprises a rectifier circuit, a secondary filter circuit and an inverter circuit, which are sequentially connected between the positive and negative ends of a bus. The rectifier circuit includes at least one four-quadrant rectifier connected in parallel. The secondary filter circuit, which is used for filtering out second harmonic, includes at least two filter capacitors connected in parallel, at least two filter inductors connected in parallel and at least one discharge resistor, wherein the at least one discharge resistor is connected in series and then connected in parallel to the two ends of the filter capacitors, and the filter inductors and the filter capacitors are connected in series. The inverter circuit includes at least one three-phase inverter connected in parallel, and each three-phase inverter is connected to at least one traction motor. By filtering out second harmonic in bus voltage, the voltage input to the inverters is accurate and reliable, and the traction motors can be driven safely and reliably.

Description

technical field [0001] The invention relates to the technical field of high-speed EMUs, in particular to a traction converter with a secondary filter circuit. Background technique [0002] The technology of high-speed EMUs has developed rapidly in recent years, and the traction converter is an important part of high-speed EMUs. The traction converter outputs three-phase alternating current to drive the traction motor in the high-speed EMU to run, thereby driving the operation of the EMU. [0003] Traction converters generally consist of rectifiers, inverters, etc. Wherein, the rectifier rectifies the input AC power, and the inverter is used to convert the rectified DC power into AC power to drive the traction motor to run. However, the rectified output voltage of the rectifier will still contain a large number of second harmonic components, which will cause voltage waveform distortion, which will not only cause damage to other devices in the converter, but also cause damag...

Claims

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Application Information

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IPC IPC(8): H02P27/08H02M5/458H02M1/14
CPCH02M1/14H02M5/458H02P27/08
Inventor 姬惠刚高永军张桂成管俊青张瑞峰顾秀江张创业王惠萍孟丹
Owner CHINA RAILWAYS CORPORATION
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