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Instantaneous voltage drop protection device

A protection device, instantaneous voltage technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve problems such as rising device costs, and achieve the effects of reducing operating costs, improving reliability, and reducing device costs

Inactive Publication Date: 2012-05-23
KYOTO DENKIKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of such a large-capacity electrolytic capacitor leads to a significant increase in the cost of the device

Method used

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  • Instantaneous voltage drop protection device

Examples

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Embodiment Construction

[0066] One embodiment (hereinafter, referred to as "first embodiment") of the instantaneous voltage drop protection device of the present invention will be described. figure 1 It is a schematic block diagram of the instantaneous voltage drop protection device of the first embodiment. for the already stated Figure 4 The same symbols are attached to the same components of the existing devices to clarify the corresponding relationship. Among them, due to the complicated description, in the configuration of this embodiment and the configuration of other embodiments described later, the Figure 4 The supplementary power unit 20 and the supplementary power drive unit 22 described in . Therefore, in the instantaneous voltage drop protection device of the present invention, in order to charge the electrolytic capacitor 17 , in addition to the inverter 18 , a supplementary electric power unit 20 may be additionally provided.

[0067] Such as figure 1 As shown, in the instantaneous...

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Abstract

The invention aims to provide an instantaneous voltage drop protection device which allows the repeated frequencies of charing and discharging of electrolytic capacitors to be reduced and enables longevity and small capacity of the electrolytic capacitors to be realized if the device is used in countries\regions where the voltage variation of commercial AC power is high. If an input AC voltage is in the range of 70% to 90% of a rate input voltage, an inverter is helped to carry out DC-AC conversion under a condition that the switch of a switching part is conducted, such that compensated power based on input AC power is generated and is added to input AC power via an injection transformer. Therefore, load can run with no time limit under an AC voltage of 90% of the rated input voltage without utilization of accumulated power of an electrolytic capacitor. If the input AC voltage drops to be 70% lower than the rated input voltage, the switch of the switching part is cut off, such that DC-AC conversion is carried out by a main inverter for converting the DC power accummulated in the electrolytic capacitor to obtain AC power for running of the load.

Description

technical field [0001] The present invention relates to an instantaneous voltage drop protection device for alternately supplying AC power to a load when the voltage of AC power supplied from a commercial AC power supply to a load temporarily drops, or when a power outage temporarily occurs. Background technique [0002] Conventionally, when the voltage of AC power supplied to a load from a commercial AC power supply drops for a short time or in the event of a short-term disconnection, an instantaneous voltage drop protection device for supplying AC power to a load instead of it has been widely used (such as Refer to Patent Documents 1 to 3, etc.). [0003] Figure 4 It is a schematic configuration diagram of a conventional instantaneous voltage drop protection device. The input terminal 11 of the device is connected to the commercial AC power supply 1 , and the output terminal 12 is connected to the load 2 . The device includes: a switching part 13, which is connected in ...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02J7/00
Inventor 大川和敏竹内晃山崎浩司藤井崇弘冈野隆夫
Owner KYOTO DENKIKI KK
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