Method for automatic recongniting phase-sequence of phase control rectifier and its phase control rectifier

A phase-controlled rectification and automatic identification technology, which is applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., to achieve the effect of simplifying the installation and debugging process and simple circuit design

Inactive Publication Date: 2005-03-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

Therefore, developing a method of automatically identifying the phase sequence of the rectifier bridge and a device for realizing this method under the premise of obtaining a synchronous signal has become a research topic for technicians, but up to now, people's proposed Some methods need to know the phase relationship between the main loop and the synchronous signal, which still cannot meet the needs of people in actual work. If it can be further improved, it will have greater practical significance

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  • Method for automatic recongniting phase-sequence of phase control rectifier and its phase control rectifier
  • Method for automatic recongniting phase-sequence of phase control rectifier and its phase control rectifier
  • Method for automatic recongniting phase-sequence of phase control rectifier and its phase control rectifier

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Embodiment Construction

[0037] The three-phase fully-controlled bridge rectifier circuit is shown in Figure 1. Each bridge arm is composed of a half-controlled device or a group of half-controlled devices through series-parallel technology (a bridge arm is called a valve at this time), and the half-controlled device generally uses a thyristor. It is customary to hope that the six bridge arms are triggered in the order from T1 to T6, so the six bridge arms are numbered in the order shown in Figure 1, where T1 and T4 are connected to the A phase of the power supply, T3 and T6 are connected to the B phase of the power supply, and T2 And T2 connected to the C phase. The cathodes of the upper three bridge arms (T1, T3, T5) are connected together, called a common cathode group, and the anodes of the lower three bridge arms (T4, T6, T2) are connected together, called a common anode group, common cathode The group and the common anode group must have a bridge arm of a different phase conduction at the same ...

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Abstract

A phase sequence method of the automatic identification phase controlled rectifier and its phase controlled rectifier. It includes the current transformer, three-phase silicon controlled complete control commutating bridge, trigger controller and synchronizing signal producing circuit. It makes use of the trigger controller to judge the phase sequence. The phase controlled rectifier with this structure can produce two synchronous signals with the phase difference of 30 degree through its synchronizing signal producing circuit. Then the trigger controller judges them automatically and gives the correct sequence of the trigger pulse.

Description

technical field [0001] The invention relates to a method for automatically identifying the phase sequence of a phase-controlled rectifier and a device for realizing the method, belonging to the technical field of rectification. Background technique [0002] The phase-controlled rectifier uses a thyristor fully-controlled or half-controlled rectifier bridge as the main circuit, and changes the output DC voltage by controlling the trigger phase of each bridge arm thyristor. In actual operation, the installation and commissioning of the phase-controlled rectifier needs to match the phase sequence of the main circuit and the synchronous signal. This is a very cumbersome task, which involves the design of the rectifier transformer and synchronous transformer wiring group and the RC phase-shifting circuit. For high-voltage applications, differential probes and dual-trace oscilloscopes are also required for auxiliary measurements. Therefore, developing a method of automatically id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/162
Inventor 杜清江石新春
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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