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Introduction To Control System Of High Current Rectifier
Mar 22, 2018

Each trigger controller has the independent power supply,synchronizing signal,DC feedback,AC feedback,Multichannel communication interface,digital regulation trigger control unit and pulse power amplifier . No shared channel,the system has the real hot redundancy control function.

The digital trigger controller adopts the fully-sealed structure design and takes the functions of preventing the corrosive gas, preventing damp and preventing high temperature; the external connection is provided with the aviation military plug with the characteristics of convenient maintenance and replacement and credible connection.

The current can be set on the touch screenprecision of the setting current  is 1A.  And the manner of workingA/B running channelManual/automatic (open loop/closed loop) and DC feedback/AC feedbackcan be switched on the touch screen without current fluctuation.

Touch screen Can real-time display control angle,setting value,running current,Manual/automatic working mode,A/B channel,DC/AC feedback,and other working condition.

The current stabilizing precision of digital trigger is better than ±0.3%.The system has the advantages of high speed of dynamic response,high precise of adjustment, stable and reliable property of function.

Touch screen control system of control cabinet.jpg

Digital trigger adopts software phase-locked loop technology,triggering pulse asymmetry degree is less than 0.05°.Non-characteristic harmonic current inputted into the power grid by rectifying devices is less.

The spare channel timely tracks the control angle and other control data of the main channel. When the main channel has fault, the system automatically switch to the spare channel without current fluctuation.

The system has the real hot redundancy control function and enables to repair and replace the digital trigger and control panel without shutting down. After be replacedthe system can copy all dates of to the new digital trigger and control panel automatically and guarantee the new one put in a hot standby mode without shakedown test.

Touch screen control system of control cabinet can realize true hot redundancy function with host computer control system. Even if one of them damaged,the control system can run in normal.

the digital trigger controller  can monitor and judge A/D converter of master controller,reference voltageparameter storage,communication interface,synchronous circuit and CPU,and etc. If one of them malfunctions,the fault message will be displayed on the touch screen. 

All parameters can be set and saved through touch screen or host computer control system.The precision of control system is precise and the control system is high reliability.

When lacking any one phase sync signal, the trigger pulse will be outputted in normal and the lack phase report will be given.When lacking three phase sync signal,the trigger pulse will be outputted normally within one second.

Once the high-voltage switch trips or receives the blocking pulse instruction,the voltage and current returns to zero automatically. When the high-voltage switch is closed again, the current has no shock current .

Lack-phase protection and zero returning protection: When the synchronous voltage lacks phase,alarm signal will be given. When high-voltage system trips due to the fault,the returning to zero signal will be given  automatically, avoiding the shock current when the high-voltage switch closed again.