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Power supply device

A technology of power supply device and control device, which is applied in the direction of circuit device, emergency power supply arrangement, output power conversion device, etc. It can solve the problems such as inability to switch off and achieve the effect of reducing surge voltage

Pending Publication Date: 2021-02-05
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In addition, in Patent Document 2, there is a problem that it is necessary to wait for the AC current flowing in the switch to reach zero, and therefore, the switch cannot be turned off quickly.

Method used

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Examples

Experimental program
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Embodiment approach 1

[0026] figure 1 It is a circuit block diagram showing the configuration of the uninterruptible power supply device according to the first embodiment. The uninterruptible power supply device supplies three-phase AC power to the load. In order to simplify the drawings and descriptions, the figure 1 Only the part associated with one is shown. In addition, such an uninterruptible power supply device is also called an instantaneous compensation device.

[0027] exist figure 1 Among them, the uninterruptible power supply device includes an AC input terminal TI, an AC output terminal TO, a battery terminal TB, a surge absorber 1 , a switch 2 , a current detector CT, a bidirectional converter 3 , and a control device 4 .

[0028] The AC input terminal TI receives the AC voltage VI of the commercial frequency from the commercial AC power supply 5 . The instantaneous value of the AC input voltage VI is detected by the control device 4 . The control device 4 determines whether or no...

Embodiment approach 2

[0102] Figure 9 It is a circuit block diagram showing main parts of an uninterruptible power supply device according to Embodiment 2 of the present invention, and is the same as Figure 4 Comparison chart. refer to Figure 9 The difference between this uninterruptible power supply device and the uninterruptible power supply device of Embodiment 1 is that the control unit 12 is replaced by the control unit 50 . In the control unit 50 , the delay circuit 20 of the control unit 12 is replaced by a zero-point detector 51 and an OR gate 52 .

[0103] Zero point detector 51 is in power failure detector 11 ( image 3 ) is activated when the output signal PC is "L" level, based on the current detector CT ( figure 1 ) output signal, detect the zero point of the AC output current IO, and output the signal DT representing the detection result. At the zero point of the AC output current IO, the instantaneous value of the AC output current IO becomes 0A.

[0104] When signal PC is a...

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Abstract

In this uninterruptible power supply device, when a switch (2) including serially connected 1st to Nth IGBT units (U1 to UN) is switched ON, the first to Nth IGBT units are switched ON, and when the switch (2) is switched OFF, the (n+1)th to Nth IGBT units are switched OFF after the 1st to nth IGBT units have been switched OFF. Therefore, compared to when the 1st to Nth IGBT units are switched OFFall at once, it is possible to reduce surge voltage that occurs between terminals of the switch (2).

Description

technical field [0001] The present invention relates to a power supply device, and more particularly, to a power supply device including a switch including a plurality of switching elements connected in series. Background technique [0002] For example, Japanese Patent Laid-Open No. 2007-97261 (Patent Document 1) discloses a switch including a plurality of switching elements connected in series. Further, for example, Japanese Patent Laid-Open No. 2-230814 (Patent Document 2) discloses that a surge voltage can be prevented from being generated due to interruption of the current by turning off the switch at the zero point of the alternating current. [0003] prior art literature [0004] Patent Literature [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2007-97261 [0006] Patent Document 2: Japanese Patent Application Laid-Open No. 2-230814 SUMMARY OF THE INVENTION [0007] The problem to be solved by the invention [0008] In Patent Document 1, wh...

Claims

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Application Information

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IPC IPC(8): H02M1/00H02M1/34H02J9/06H03K17/16
CPCH02M1/08H02M1/348H02J9/062H03K17/107H03K17/168H03K17/163H03K2217/0063H02J9/06H02M1/34H03K17/16H02M3/33584H03K17/567
Inventor 张晓琛中野俊秀
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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