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SPWM synchronous pulse generating circuit and method based on editable logic device and system

A technology for synchronizing pulses and generating circuits, applied in the field of traction transmission, can solve problems such as the inability to guarantee the operation stability and safety of traction power grids, and achieve the effects of overcoming clock asynchrony, improving stability, and solving lost pulses

Active Publication Date: 2019-12-27
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

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  • SPWM synchronous pulse generating circuit and method based on editable logic device and system
  • SPWM synchronous pulse generating circuit and method based on editable logic device and system

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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 invention provides an SPWM synchronous pulse generating circuit and method based on editable logic device and a system. A traction power grid phase is locked through a control algorithm, and pulsesynchronization at a train level is realized; through master-slave modes among different controllers under the same transformer and external synchronous signals, pulse synchronization at a transformer level is realized; pulse synchronization at a converter level is realized through the carrier synchronization pulse between a DSP and an FPGA, the problems of clock non-synchronization among a plurality of controllers and clock non-synchronization between the DSP and a chip of the FPGA are solved, accumulated errors caused by non-synchronization of carrier and modulation wave signals are eliminated, the problem of pulse loss of a converter power device is solved, and the running stability of a railway locomotive is improved.

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 Applications(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