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A. c. electricity control device

A technology of AC voltage and control devices, which is applied in the direction of control/regulation systems, adjustment of electrical variables, conversion equipment that can be converted to DC without intermediate conversion, etc., and can solve problems such as difficult maintenance of supply voltage

Inactive Publication Date: 2006-07-05
NTT DATA EX TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason why the supply voltage has such a range is that even in a day, voltage changes occur in the morning, noon, and evening, and it is difficult to maintain the supply voltage due to differences in power conditions in different regions.

Method used

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  • A. c. electricity control device
  • A. c. electricity control device
  • A. c. electricity control device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0063] figure 1 It is a schematic configuration diagram showing the AC voltage control device of the first embodiment. The AC voltage control device 1 includes a pair of input terminals for inputting a single-phase two-wire system AC power supply on the input side, that is, an input terminal R1 and an input terminal S1, and an output terminal including a single-phase two-wire system output voltage that lowers the output voltage. A pair of output terminals, output terminal R2 and output terminal S2.

[0064] The so-called single-phase two-wire system power supply voltage is, for example, a power supply method of a commercial power supply of AC 100 V or AC 200 V that is also used in ordinary households. In this mode, for example, 200V is input to the input terminal R1, and the input terminal S1 is grounded, so an AC power supply voltage of 200V is applied between the input terminals R1-S1.

[0065] exist figure 1 In, the input terminal R1 and the input terminal S1 are connect...

no. 2 Embodiment approach

[0087] image 3 It is a schematic configuration diagram showing the structure of the AC voltage control device 2 of the second embodiment. In this AC voltage control device 2 , the control unit 20 is configured by adding a switch SW2 for switching the connection polarity between the primary winding P and the secondary winding S of the transformer TR2 to the control unit 10 of the first embodiment. Also, other constructs with figure 1 The AC voltage control device 1 shown in the first embodiment is the same, and the same reference numerals are assigned to the same parts.

[0088] In the first embodiment, in order to increase the energy-saving effect, the step-down output obtained by reducing the AC power supply voltage is supplied to the load. In addition, in a building where the power condition is not good, there is a problem that the operation of the equipment becomes unstable due to a drop in the supply voltage. In this case, instead, it is necessary to increase the AC po...

no. 3 Embodiment approach

[0108] Figure 5 It is a schematic configuration diagram showing the AC voltage control device 3 of the third embodiment. In this AC voltage control device 3, a switch SW3 is inserted instead of the switches SW1 and SW2 included in the control unit 20 of the second embodiment to form a control unit 30. The switch SW3 switches the primary winding P and the secondary winding of the transformer TR2. The connection polarity of S, and at the same time switch the mutual connection relationship between one end and the other end of the primary winding P and one end, the tap, and the other end of the autotransformer TR1. In addition, other configurations are the same as those of the AC voltage control device 1 shown in the first embodiment, and the same parts are denoted by the same reference numerals.

[0109] exist Figure 5 Among them, one end of the primary winding P of the transformer TR2 is connected to the base point x1 of the switch SW3 through the lead d, and the other end i...

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Abstract

The present invention uses simple method to realize the controlling of the output electric tension in the control device of the alternating current voltage when the capacity of the equipment is not increased. Connect in parallel the single-phase two-wire system input terminals R1, S1 to one end and the other end of the autotransformer TR1 with center tapping, connect the input end S1 with output end S2 with pin cord c1, it includes a primary winding P whose one end is connected to one end of the autotransformer TR1, a transformer TR2 which do magnetic coupling to the primary winding P and is connected to the secondary winding S between the input end R1 and the output end R2; and a switch which switches the connecting objects of the other end of the primary winding P with any end in one end of the autotransformer, the tap, or the other end.

Description

technical field [0001] The present invention relates to an AC voltage control device, in particular to an AC power supply of a single-phase two-wire system, a three-phase three-wire system or a three-phase four-wire system, which can be realized with a simple structure to obtain an AC power supply whose voltage drops or rises in stages. An AC voltage control device for voltage conversion for power supplies. Background technique [0002] The AC voltage supplied to the load from a commercial power supply varies in each power supply method or in each country, for example, there are single-phase two-wire system 100 / 200V, single-phase two-wire system 220V, single-phase three-wire system 100 / 200V system, 200V three-phase three-wire system, 100 / 200V three-phase four-wire system, 220 / 380V three-phase four-wire system, etc. Furthermore, it is assumed that the supply voltage is not always constant but can be varied, and the permissible range of this variation is regulated by relevant...

Claims

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Application Information

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IPC IPC(8): G05F1/24G05F5/04H02M5/12
Inventor 羽田正二高草英博岡田實和田晴樹井上染治
Owner NTT DATA EX TECH CORP
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