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Method and device for controlling voltage

A technology of voltage control equipment and equipment, applied in the direction of control/regulation system, electrical components, regulating electrical variables, etc., can solve problems such as cost increase, electrical equipment damage, equipment failure, etc.

Inactive Publication Date: 2005-09-21
PRESIDIO POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, excess electricity is consumed, resulting in increased costs
Second, additional heat and losses are generated in the device, which can lead to premature device failure
Third, electrical equipment may be damaged by excessive voltage surges

Method used

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  • Method and device for controlling voltage
  • Method and device for controlling voltage
  • Method and device for controlling voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] refer to figure 1 , which shows a circuit diagram of a voltage capping device 1 . The device 1 is connected between an AC power supply having three phases P1, P2, P3 and one three-phase electrical device denoted by L1, L2, L3.

[0063] The device 1 has three electric switches THY1, THY2, THY3, and the electric switches THY1, THY2, THY3 are respectively located between each phase P1, P2, P3 of the power supply and the equipment L1, L2, L3 to change each half of the AC mains power supply. time to cycle the supply voltage. Each of the switches THY1, THY2, and THY3 is a thyristor module formed by a pair of thyristors arranged back to back (such as figure 2 shown). This structure is known as a pair of thyristors connected in antiparallel. Thyristors are also known as silicon controlled rectifiers (or SCRs).

[0064] As described below, each thyristor module varies the timing of the supply voltage by delaying the start of each voltage rise for each half cycle. The swit...

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PUM

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Abstract

A voltage control device for connection to an electrical supply having an alternating supply voltage, and relative method for controlling voltage. The device comprising: an input (P1, P2, P3) having an input voltage, said input for connection to the electrical supply; an output (L1, L2, L3) having an output voltage; means for comparing the output voltage with a predetermined voltage (V1, V2, V3) and generating a comparison signal; means to adjust (THY1, THY2, THY3) the output voltage in response to the comparison signal, said means being connected to the input and output; whereby the output voltage is maintained substantially at the predetermined voltage. Preferably, the means to adjust the output voltage comprise means to delay the onset of the rise of output voltage within one half-cycle. More preferably, the means to delay comprises a thyristor module.

Description

technical field [0001] The invention relates to a voltage control device for electrical equipment. Background technique [0002] Many places such as commercial establishments such as shopping malls and business offices operate electrical equipment such as refrigerators, air-conditioning rooms, cold storage and computer equipment. Most of these devices operate on a 230V alternating current (AC) rated voltage. [0003] However, the power supplied to these sites varies significantly between 200V AC and 250V AC, and in many cases the supplied voltage tends towards the higher of these two extremes. [0004] Many problems can arise if the supplied voltage is higher than the rated voltage of an electrical device. First, excess electricity is consumed, resulting in increased costs. Second, additional heat and losses are generated in the device, which can lead to premature device failure. Third, electrical equipment may be damaged by excessive voltage surges. [0005] Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/44H02M5/257
CPCH02M5/2573G05F3/04
Inventor 齐亚·史莱蒙
Owner PRESIDIO POWER LTD