As mentioned in our Product page, static voltage regulator does not includes any moving parts unlike servo voltage regulator. It achieves voltage regulation with help of static electronic circuits only. In this discussion we will understand working of Static voltage stabilizer. For better understanding of working of these type of voltage regulator we need to understand it's major components.

Major Components of Static voltage Stabilizer.

Please refer diagram below. Lets understand major components of Static voltage regulator.

1) Buck Boost Transformer: Secondary of Buck and boost transformer is connected input and output terminal of voltage stabilizer. Neutral between input and output of static voltage stabilizer is common hence voltage induced across secondary of buck boost transformer can add or subtract with input voltage. Primary of buck boost transformer is connected to IGBT power stage.

2) IGBT Power Stage: It consists of IGBT bridge which connected to DSP controller. IGBT power stage responsible to generate appropriate amount of voltage with help of PWM method. Output voltage of IGBT bridge is applied across primary of buck boost transformer. IGBT bridge can generate voltages at its output (which applied across primary of buck boos transformer) which can be in phase or 180 degree out of phase with input line voltages so that voltage induced across secondary of buck boost transformer can be added to or subtracted from input line voltages.

3) DSP based Control board: Control board continuously senses valued of  input voltage, output voltage, load current and IGBT current with help of Current transformer and voltage transformer connected to it. It processed information and gives signal to IGBT power stage to generated voltage with help of PWM method.

static voltage regulator block diagram

How Static Voltage stabilizer works?

 DSP bases control board continuously senses input voltage, output voltage, load current and IGBT current with help of CTs and VTs. Based on these values DSP control board will trigger IGBT bridge to generate voltage at its output with help of PWM method.  Lets see in details operation of Static voltage regulator in Buck and Boost mode.

 static voltage regulator diagram low voltage

  • Boost Mode Working of static voltage regulator:

    Lets consider example that a load of 50kVA, 220V is connected at output of static voltage regulator. and suppose low voltage of 180V is available at input line which needs to be corrected to 220V. When DSP control board senses values of input voltage, output voltage, load current and IGBT current, to correct voltage it will trigger IGBT bridge to generate 40V (220-180=40V) at its output which is in phase with input line voltages. It induces 40V at secondary of buck boost transformer. since both voltage; input line and voltage across secondary of buck boost transformer are in phase with each other , it get added and output voltage corrected to 220v.

  • Buck Mode Working of static voltage stabilizer:

    Lets consider example that a load of 50kVA, 220V is connected at output of static voltage regulator. and suppose high voltage of 250V is available at input line which needs to be corrected to 220V. When DSP control board senses values of input voltage, output voltage, load current and IGBT current, to correct voltage it will trigger IGBT bridge to generate 30V (250-220=30V) at its output which is 180 degree out of phase with input line voltages. It induces 30V at secondary of buck boost transformer. since both voltage; input line and voltage across secondary of buck boost transformer are 180 degree out of phase with each other , it get subtracted and output voltage corrected to 220v. We strongly recommend Static Voltage regulator over traditional servo voltage stabilizer or servo voltage regulator.

 

 

 

How Static Voltage Regulator Works?
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