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

Three-phase rectifying device

A technology of three-phase rectification and three-phase AC, which is applied in the direction of output power conversion device, conversion of AC power input to DC power output, sustainable manufacturing/processing, etc., and can solve problems such as overlap

Active Publication Date: 2013-05-29
TOSHIBA CARRIER CORP
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, although the input current waveform can be made to follow a sine wave by the above-mentioned high-frequency switching, there is a problem that the noise (noise) accompanying the high-frequency switching is superimposed on the input current.

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
  • Three-phase rectifying device
  • Three-phase rectifying device
  • Three-phase rectifying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0045] Such as figure 1 As shown, a three-phase rectifier 10 is connected to the U phase, V phase, and W phase of the three-phase AC power supply 1, and the output voltage of the three-phase rectifier 10 (the voltage generated by the smoothing capacitor 24 described later) is supplied to the load 2. .

[0046] The load 2 uses, for example, an inverter device for driving a motor, and its electricity consumption fluctuates. The three-phase rectification device 10 has: reactors 21, 22, 23 for reducing high-order harmonics, which are provided on the connection line (line) with the three-phase AC power supply 1; And connected to the three-phase AC power supply 1; current sensors (sensors) 41, 42, 43 are provided on the connection lines between the three-phase AC power supply 1 and the reactors 21, 22, 23; and the current detection circuit 50, through these currents The ...

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 invention provides a three-phase rectifying device. The three-phase rectifying device enables a power factor to be improved and the high-frequency switch noise superposed on an input current to be reduced, so that N1 times of short circuit occur discontinuously between a mutual connecting point of two diodes of series circuits in a rectifying circuit and a negative side output end of the rectifying circuit, and at the front edge side of a phase which comes from a three-phase AC power supply and at which the input current becomes a positive level, and at the back edge side of the same phase, N2 times of short circuit occur discontinuously; and N1 times of short circuit occur discontinuously between the mutual connecting point of two diodes of series circuits in the rectifying circuit and a positive side output end of the rectifying circuit, and at the front edge side of a phase which comes from a three-phase AC power supply and at which the input current becomes a negative level, and at the back edge side of the same phase, N2 times of short circuit occur discontinuously. Moreover, according to an input power, the ratio N1 / N2 of the times of N1 and N2 is switched.

Description

technical field [0001] Embodiments of the present invention relate to a three-phase rectifying device that rectifies the voltage of a three-phase AC power supply to convert it into a DC voltage. Background technique [0002] A common rectification circuit that rectifies the voltage of a three-phase AC power supply to convert it into a DC voltage has three series circuits formed by connecting a pair of diodes in series. The connection points of the diodes in these series circuits are Connect to each phase of the three-phase AC power supply. In addition, a smoothing capacitor (condenser) is connected to an output terminal of the rectification circuit, and a load is connected to the smoothing capacitor. [0003] The three-phase AC voltage includes: 3 phase voltages whose phases are different from each other by 120°, through these phase voltages, a current flows to a smoothing capacitor through each positive-side diode of each series circuit, and the current flows from the smoo...

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): H02M7/219H02M1/44H02M1/42
CPCY02B70/126Y02B70/10Y02P80/10
Inventor 植杉通可
Owner TOSHIBA CARRIER CORP