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

Power converting apparatus

A technology of power conversion device and power converter, which is applied in the direction of high-efficiency power electronic conversion, output power conversion device, electrical components, etc., can solve the problems of high price and complex structure, and achieve the effect of current control and high-speed current control

Inactive Publication Date: 2014-03-12
MITSUBISHI ELECTRIC CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control hardware that implements this control has the following problems: a complex and expensive CPU (Central Processing Unit: Central Processing Unit) and complex peripheral circuits such as a large number of A / D converters for taking information into the CPU are required.

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 converting apparatus
  • Power converting apparatus
  • Power converting apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] Next, the power conversion device according to Embodiment 1 of the present invention will be described. figure 1 It shows the power converter that is the main circuit of the power conversion device according to the first embodiment of the present invention, more specifically the power that converts the power from the three-phase AC power supply (system power supply) 1 into DC power and supplies it to the DC load 2 Diagram of the structure of the converter.

[0028] Such as figure 1 As shown, each phase on the AC line side of the main converter 3 that converts three-phase AC power into DC power is connected to each of the sub-converters 4 and AC reactors 5 composed of a single-phase full bridge circuit. The main converter 3 is a three-phase two-level converter (three-phase two-level converter) in which a main capacitor 7 as a power storage is connected on the DC side. It is assumed that the DC power is regenerated on the AC side and the diode is connected in anti-parallel. ...

Embodiment approach 2

[0092] Next, the power conversion device according to Embodiment 2 of the present invention will be described.

[0093] In the first embodiment described above, a converter that converts AC power into DC power is shown, but a power converter having the same structure can also be used as an inverter that converts DC power into AC power.

[0094] Figure 14 It is a figure which shows the structure of the power conversion apparatus of Embodiment 2 of this invention. As shown in the figure, the power conversion device converts DC power from a DC power source 200 such as a solar cell or a fuel cell into AC power and connects it to an AC power source 210 that is a three-phase power system. The main circuit includes: a power converter 100 having the same circuit configuration as the above-mentioned first embodiment; and a smoothing capacitor 110 and a DC / DC converter 111 provided in the front stage of the power converter 100, and is provided with output to the power converter 100 The co...

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

A power converting apparatus is configured with single-phase sub-converters (4) connected to AC input lines of individual phases of a three-phase main converter (3) in series therewith. In a control device (12) for performing output control of the power converting apparatus, a current command value calculating circuit (20) which adjusts a DC voltage command given to the main converter (3) so that DC voltages of the sub-converters (4) follow a command and generates AC current commands so that a DC voltage of the main converter (3) follows the DC voltage command is configured with a CPU, and AC currents are controlled by switching output voltage levels of the sub-converters (4) at an AC side thereof so that deviations of instantaneous AC current values from the AC current commands become smaller.

Description

Technical field [0001] The invention relates to the control of a power conversion device with an AC-DC conversion function. Background technique [0002] The following shows a converter capable of regeneration control as a conventional power conversion device. [0003] The AC side of a single-phase sub-converter having a DC voltage lower than the DC voltage of the main converter is connected in series to each phase of the AC input line of the three-phase main converter to form a power converter. Furthermore, the main converter is driven by a gate pulse that is one pulse for a half cycle, and the voltage generated at the AC terminal of the sub converter is controlled to be the difference between the AC power supply voltage and the voltage generated at the AC terminal of the main converter. Thereby, it is possible to suppress higher harmonics without increasing the reactor size, and it is possible to reduce power loss and electromagnetic noise (for example, refer to Patent Document ...

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 Patents(China)
IPC IPC(8): H02M7/219H02M7/25
CPCH02M7/219H02M1/4216Y02B70/126H02M1/4233Y02B70/10
Inventor 森修藤井俊行岩田明彦石川纯一郎安江正德岸田行盛
Owner MITSUBISHI ELECTRIC CORP