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power inverter circuit

A technology of inverter and power supply, applied in the field of bridge power inverter circuit, can solve the problem of difficulty in realizing low cost, and achieve the effect of low cost

Inactive Publication Date: 2017-05-17
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it necessary for all switching elements to use switching elements that can operate at relatively high speeds, making it difficult to achieve low-cost

Method used

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Examples

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no. 1 example

[0027] figure 1 is a circuit diagram for explaining the inverter according to the first embodiment of the present invention. The inverter (power inverter circuit) 1 of the first embodiment is a single-phase full-bridge inverter. Inverter 1 will input terminal T on the higher voltage side IH with the lower voltage side input terminal T IL The DC power fed between the first and second output terminals T O1 , T O2 between single-phase AC power. The inverter 1 includes first to fourth switching elements 11 to 14 and a control circuit 20 .

[0028] The first and second switching elements 11, 12 are sequentially connected in series at the higher and lower voltage side input terminals T IH , T IL between, while its intermediate node is connected to the first output terminal T O1 connected. For example, the first switching element 11 on the upper arm side is a PMOSFET, and the second switching element 12 on the lower arm side is an NMOSFET.

[0029] More specifically, the f...

no. 2 example

[0093] Image 6 is a circuit diagram for explaining an inverter according to a second embodiment of the present invention. The inverter (power inverter circuit) 1A of the second embodiment is a three-phase bridge inverter. Inverter 1A will input terminal T on the higher voltage side IH with the lower voltage side input terminal T IL The DC power fed between the first to third output terminals T O1 , T O2 , T O3 Three-phase AC power among them. The inverter 1A differs from the inverter 1 of the first embodiment in that it further includes fifth and sixth switching elements 15 , 16 and a control circuit 20A instead of the control circuit 20 .

[0094] Fifth and sixth switching elements 15, 16 are sequentially connected in series at the higher and lower voltage side input terminals T IH , T IL between, while its intermediate node is connected to the first output terminal T O3 connected. For example, the fifth switching element 15 on the upper arm side is a PMOSFET, and t...

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Abstract

The power inverter circuit (1) according to one embodiment of the present invention is a bridge power inverter circuit comprising The first and second switching elements (11, 12) and the third and fourth switching elements (13, 14) sequentially connected in series between the input terminals of the higher and lower voltage sides, the bridge power inverter The converter circuit converts DC power fed between input terminals on the higher and lower voltage sides into AC power. One of the set of first and third switching elements (11, 13) and the set of second and fourth switching elements (12, 14) controls switching at a higher frequency than the other set.

Description

technical field [0001] The present invention relates to a bridge power inverter circuit for converting DC power into AC power. Background technique [0002] As a power inverter circuit for converting DC power into AC power, a bridge inverter is widely known. As such bridge inverters, Non-Patent Document 1 discloses single-phase and three-phase inverters. [0003] The single-phase bridge inverter includes first and second switching elements sequentially connected in series between input terminals of higher and lower voltage sides and sequentially connected in series between input terminals of higher and lower voltage sides. between the third and fourth switching elements. By alternately turning on the set of the first and fourth switching elements and the set of the second and third switching elements, the single-phase bridge inverter switches between the intermediate node of the first and second switching elements and the third and fourth switching elements Single-phase A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387
CPCH02M7/538H02M7/5387H02M7/53871
Inventor 藤川一洋初川聪志贺信夫大平孝
Owner SUMITOMO ELECTRIC IND LTD