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Wave method of silicon controlled crystal brake pipe rectifier and its device

A technology of silicon thyristors and rectifiers, which is applied in the field of silicon-controlled thyristor rectifier wave generating methods and devices, can solve the problems of large ripple voltage on the rectifier bus and reduce the quality of rectifier output voltage, and achieve accurate SCR commutation operation, real-time Responsive, quality-enhancing effects

Active Publication Date: 2007-05-02
EMERSON NETWORK POWER CO LTD
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AI Technical Summary

Problems solved by technology

When using this method, the rectifier's wave accuracy is a T s , when T s When it is large (such as 200uS), it will cause a large ripple voltage on the bus bar of the rectifier, thereby reducing the quality of the output voltage of the rectifier

Method used

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  • Wave method of silicon controlled crystal brake pipe rectifier and its device
  • Wave method of silicon controlled crystal brake pipe rectifier and its device
  • Wave method of silicon controlled crystal brake pipe rectifier and its device

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Embodiment Construction

[0057] The present invention is further elaborated below in conjunction with accompanying drawing and embodiment:

[0058] In order to solve the commutation error caused by conventional SCR wave transmission and realize accurate SCR commutation operation, the present invention adopts three methods, adding a high-priority interrupt mode in the timing interrupt, according to the phase and / or amplitude of the input voltage characteristics, as well as the firing angle of the thyristor, obtain the precise time of commutation of each thyristor in the rectifier, and preset the precise commutation time into the comparison unit of the timer, when the commutation time matches the timer A timer comparison interrupt occurs, and the SCR commutation operation is performed in the timer comparison interrupt service subroutine to realize accurate SCR commutation operation.

[0059] The specific implementation of method one is as follows:

[0060] Rewrite the previous SCR commutation condition...

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Abstract

This invention discloses a waving method and a device for the rectifier of silicon controlled thyristor including: obtaining waving time scale of thyristors in a rectifier based on the phase and amplitude character of input voltage and trigger angles of the thyristors, presetting said waving time in a comparing unit of the timer, if the time is matched to the timer, then the timer comparison is stopped to change the phase of the thyristor. Said device includes a signal transmitting module sending phase-change operation signals to silicon controlled thyristors of a rectifier, an obtaining module getting waving time of the thyristors based on the phase and amplitude character of input voltage and trigger angle of the thyristor and a timer module locating said signal sending module to send the time scale of the phase-change operation signal based on said waving time scale.

Description

[technical field] [0001] The invention relates to the technical field of rectification, in particular to a method for generating waves of a thyristor rectifier and a device thereof. [Background technique] [0002] Most of the current high-power UPS adopts analog control technology. In order to improve reliability, it is an inevitable trend to change to digital control. Limited by the voltage and current stress of power devices, high-power UPS rectifiers usually use silicon-controlled thyristor (SCR) rectification technology. However, after the high-power SCR rectifier adopts digital control technology, due to the unique sampling and control delay of the digital control itself, the rectifier wave generation accuracy is reduced, which may easily lead to asymmetrical input current of the SCR rectifier, increased bus ripple and reduced system control stability. And other issues. [0003] The digital control SCR rectifier usually adopts the software framework of the main progra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/155H02M1/06H02M1/08
Inventor 季建强于相旭陈保群刘代兵
Owner EMERSON NETWORK POWER CO LTD
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