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Spwm synchronous pulse generation circuit, method and system based on editable logic device

A technology of synchronous pulse and pulse generation, applied in the field of traction transmission, can solve the problems of unguaranteed operation stability and safety of traction power grid, and achieve the effect of overcoming clock asynchrony, improving stability and solving lost pulses.

Active Publication Date: 2021-10-01
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability and safety of the current traction grid cannot be guaranteed

Method used

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  • Spwm synchronous pulse generation circuit, method and system based on editable logic device
  • Spwm synchronous pulse generation circuit, method and system based on editable logic device

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] In order to solve the problem that the current stability and safety of the traction power grid cannot be guaranteed, the core idea of ​​this application is to suppress the current harmonics on the side of the traction power grid through PWM pulse carrier phase shifting, and through comprehensive pulse synchronization, that is, the whole vehicle level , transformer level, and converter level pulse synchronization to eliminate harmonics to the greatest ext...

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Abstract

The SPWM synchronous pulse generation circuit, method and system based on editable logic devices provided by this application lock the phase of the traction power grid through the control algorithm, and realize the pulse synchronization at the train level; through the master-slave mode and The external synchronization signal realizes the pulse synchronization at the transformer level; through the carrier synchronization pulse between DSP and FPGA, the pulse synchronization at the converter level is realized, which overcomes the clock asynchrony between multiple controllers and the clock inconsistency between DSP and FPGA chips. The synchronization problem eliminates the cumulative error caused by the asynchronous carrier and modulation wave signals, solves the "pulse loss" problem of the power device of the converter, and improves the stability of the rolling stock operation.

Description

technical field [0001] The present invention relates to the field of traction transmission, and more specifically, to a SPWM synchronous pulse generation circuit, method and system based on an editable logic device. Background technique [0002] On electrified rail rolling stock such as locomotives and EMUs, traction converters are used as the power source of rolling stock. Change to three-phase AC power to drive the motor to pull the train forward, or when electric braking is required, the traction converter rectifies the three-phase power generated by the motor into a DC voltage, and then inverts it into a one-way AC power feed back to the traction power supply network, wherein, The equipment that converts electric energy between the DC voltage and the traction grid is called a four-quadrant converter, and the device that converts the converted DC voltage into three-phase AC power to drive the motor or other three-phase loads is called an inverter. component of the stream...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0421G05B2219/25264G05B2219/25392
Inventor 马驰赵震刘洋蒋威赵雷廷刘伟志左鹏杨宁宋术全刘东辉周义杰杨二林
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD