Unlock instant, AI-driven research and patent intelligence for your innovation.

Power converter

A technology for power conversion devices and converters, which is applied to output power conversion devices, circuit devices, and conversion of AC power input to DC power output, and can solve problems such as increased operating costs and reduced conversion efficiency

Inactive Publication Date: 2004-12-22
FUJI ELECTRIC CO LTD
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the conversion efficiency is lowered and the running cost is also increased.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power converter
  • Power converter
  • Power converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0094] Embodiments of the present invention will be described below with reference to the drawings.

[0095] first, figure 1 It is a circuit diagram showing Embodiment 1 of the present invention, and corresponds to the invention described in claim 1 and claim 2 .

[0096] exist figure 1 , the following circuits are respectively connected in parallel, namely: a series circuit of first and second semiconductor switching elements 10 and 11 such as IGBTs (insulated gate bipolar transistors) in which first and second diodes 14 and 15 are connected in antiparallel (referred to as the first switching element series circuit), and the third and fourth semiconductor switching elements 12,13 connected in antiparallel to the third and fourth diodes 16,17 in series (referred to as the second switching element series circuit) circuit), and the series circuit of the first and second capacitors 30, 31 (called capacitor series circuit). The third capacitor 32 is connected in parallel to t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The electric power converter includes a series converter connected in series between an AC power supply 1 and a load 6, and having capacitors 30, 31 as a power supply for the converter, switching devices 12, 13, and diodes 16, 17; and a parallel converter connected in parallel to the AC power supply 1 and having the capacitors 30, 31, switching devices 10, 11, and diodes 14, 15. The series converter compensate the change in the voltage of the AC power supply 1 to feed a certain voltage to the load 6, and the parallel converter conducts charging and discharging operations to compensate the changes in the voltages of the capacitors 30 and 31 caused by the compensating operations of the series converter. The converter suppresses the change of the AC power supply voltage and feeds a certain voltage to the load at a high efficiency and low running costs.

Description

technical field [0001] The present invention relates to a characteristic power conversion device in the configuration of a main circuit for supplying a load with a stable voltage from an AC power source. Background technique [0002] Figure 10 A circuit diagram showing a conventional power conversion device that temporarily converts AC power into DC power and then converts it back into AC power. [0003] exist Figure 10 A series circuit of semiconductor switching elements 10, 11 is connected to one end of the AC power source 1 via a reactor 40, and diodes 14, 15 are connected in antiparallel to these switching elements 10, 11, respectively. [0004] PWM (Pulse Width Modulation) controlled switching elements 10, 11 act as a rectifier circuit together with diodes 14, 15, while storing energy on capacitors 30, 31 connected in series, control and conversion operations are performed, so that capacitors 30, 31 The voltage becomes a DC voltage. [0005] In addition, a series ci...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/18H02J3/32H02M5/458
CPCH02J3/1814H02M2001/0093Y02E40/34Y02E40/18H02J3/32H02M5/4585H02J3/16Y02E40/10Y02E40/30H02M1/0093
Inventor 大熊康浩
Owner FUJI ELECTRIC CO LTD