Power conversion device

A power conversion device, voltage technology, applied in the direction of output power conversion device, electrical components, conversion equipment for intermediate conversion to DC conversion, etc., can solve complex circuit structure, no AC input terminal power factor improvement and current waveform improvement And other issues

Inactive Publication Date: 2005-06-01
SANKEN ELECTRIC CO LTD
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned gazette, there is disclosed a technology for reducing the number of switching times of the switch included in the AC-DC-AC conversion device, but there is no technology for improving the power factor of the AC input terminal and improving the current waveform by the switch
In addition, in order to selectively obtain the first, second, and third modes, the above-mentioned previously disclosed AC-DC-AC conversion device has a plurality of switches and has a relatively complicated circuit structure.

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 conversion device
  • Power conversion device
  • Power conversion device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] figure 1 According to Embodiment 1 of the present invention, a switch-type AC-DC-AC device, that is, a power conversion device that can obtain a plurality of voltage conversion forms is shown. This power conversion device can also be referred to as a voltage regulator with a power factor improvement function, and is roughly composed of a conversion circuit 1 and a control circuit 2 .

[0055] The conversion circuit 1 is composed of, for example, an AC input terminal 4 connected to one end of a 50 Hz commercial AC power supply 3, an input-side common terminal 5 connected to the other end of the AC power supply 3, first, second, third, fourth, and fifth and sixth switches Q1, Q2, Q3, Q4, Q5, and Q6, a DC link capacitor composed of polarized electrolytic capacitors or a smoothing capacitor C that can also be called a DC capacitor, an inductor L1 that is a reactance coil of the input stage, and an output stage Inductor L2 is the reactance coil for filtering, capacitor C1 f...

Embodiment 2

[0142] Below, refer to Figure 13 The voltage converting device of the second embodiment will be described. But when Figure 13 in, for and figure 2 The same symbols are assigned to the same parts, and descriptions thereof are omitted. In addition, in Example 2, refer to Figure 1 to Figure 11 .

[0143] The voltage conversion device of embodiment 2 will figure 1 The control circuit 2 is transformed into Figure 13 shown in control circuit 2a, other configurations and figure 1 same. Figure 13 The control circuit 2a sets the figure 2 The 1st, 2nd and 3rd computing circuits 47a, 48a, 49a after the modification of the 1st, 2nd and 3rd computing circuits 47, 48 and 49 of the control circuit 2, other structures and figure 2 same.

[0144] Figure 13 The first calculation circuit 47a is connected to the first and second command value generation units 44, 45, performs the calculation of the following formula, and outputs the difference signal ΔV. which is

[0145] ...

Embodiment 3

[0160] Below, refer to Figure 14 The control circuit 2b of the voltage conversion device of the third embodiment will be described. But when Figure 14 in, for and figure 2 Parts that are actually the same are denoted by the same symbols, and descriptions thereof are omitted. Figure 14 The control circuit 2b sets the figure 2 The first and second arithmetic circuits 47b, 48b and selection circuit 49b after the deformation of the first, second and third arithmetic circuits 47, 48, 49 of the control circuit 2, in addition, two adders 71, 73 are also provided and a subtractor 72 and the third limiter 74, other structures and figure 2 same.

[0161] Figure 14 The first arithmetic circuit 47b is connected to the first and second command value generation units 44, 45, performs the calculation of Vrc-Vri, and outputs the difference signal ΔV1.

[0162] The second calculation circuit 48b is connected to the first and second command value generation units 44 and 45, perfor...

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

Cost reduction and power factor improvement of voltage conversion devices that can selectively obtain voltage level non-conversion mode, step-down mode, and step-up mode are required. The respective series circuits of the first and second switches, the third and fourth switches, and the fifth and sixth switches and the capacitor C are connected in parallel to each other. Connect the AC input terminal (4) to the connection point (8) of the first and second switches through the first inductance. Connect the second inductor between the connection point (10) of the fifth and sixth switches and the AC output terminal (6). Connect the connection point (9) of the 3rd and 4th switches to the common terminal (5). Switches the control of the 1st to 6th switches (Q1 to Q6). The third and fourth switches are turned on / off at a high frequency to improve the power factor.

Description

technical field [0001] The present invention relates to a single-phase or multi-phase power conversion device capable of voltage conversion and power factor improvement of an AC input voltage in multiple forms. Background technique [0002] As is well known, a power conversion device capable of performing AC-DC-AC conversion is composed of a half-bridge AC-DC converter and a half-bridge DC-AC converter. In addition, in order to improve the efficiency of the AC-DC-AC conversion device, in order not to control the on / off of all the switches of the half-bridge AC-DC converter and the switch of the half-bridge DC-AC converter at a high repetition rate , Only make a part of the switches included in the AC-DC-AC conversion device turn on / off at a high repetition frequency and make the rest of the switches act as rectifiers. The applicant proposed an AC The cycle of the supply voltage controls the on / off manner. [0003] The AC-DC-AC conversion device proposed in the above public...

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
IPC IPC(8): H02M5/458
CPCH02M5/4585
Inventor 伊东洋一佐藤伸二中岛康博渡边敏彦
Owner SANKEN ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap