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

Switching circuit for three-phase AC power supply

A three-phase AC, switching circuit technology, applied in the conversion equipment and electrical components that convert DC power input to DC power output, and can be converted to DC without intermediate conversion, can solve the problems of complex switching circuit structure, achieve suppression The effect of structural complexity

Inactive Publication Date: 2017-08-25
MITSUBISHI ELECTRIC CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the related art A, there is a problem that the structure of the switching circuit for the three-phase AC power supply capable of handling multiple types of three-phase AC power supply is complicated.

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
  • Switching circuit for three-phase AC power supply
  • Switching circuit for three-phase AC power supply
  • Switching circuit for three-phase AC power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a figure which shows the structure of the switching circuit 100 for three-phase AC power supply concerning Embodiment 1 of this invention. refer to figure 1 , the switching circuit 100 for a three-phase AC power supply is electrically connected to the input terminal portion 8 . Hereinafter, "the component A and the component B are electrically connected" may omit the description of "electrically" and express it as "the component A and the component B are connected".

[0030] The input terminal unit 8 is connected to a three-phase AC power supply (not shown). This three-phase AC power supply constitutes an R phase, an S phase, and a T phase of a three-phase AC. The R phase, the S phase, and the T phase are respectively AC. In addition, when the type of the three-phase AC power supply is a three-phase four-wire system, the three-phase AC power supply also supplies the N-phase of the AC. Hereinafter, R phase, S phase, T phase, and N phase are described ...

Embodiment approach 2

[0081] In this embodiment, a configuration using interphase voltages of the R phase, the S phase, and the T phase will be described. image 3 It is a diagram showing the configuration of a switching circuit 100A for a three-phase AC power supply according to Embodiment 2 of the present invention.

[0082] refer to image 3 100 A of switching circuits for three-phase AC power sources differ from the switching circuit 100 for three-phase AC power sources in that they further include a phase-to-phase voltage detection circuit 50 and a switch SW1 . The other configurations of the switching circuit 100A for three-phase AC power supply are the same as those of the switching circuit 100 for three-phase AC power supply, and therefore detailed description thereof will not be repeated.

[0083] The phase-to-phase voltage detection circuit 50 is a circuit that detects (detects) two different alternating-current phase-to-phase voltages among the R-phase, S-phase, and T-phase of the alter...

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 present invention provides a switching circuit for a three-phase AC power supply, capable of coping with multiple types of three-phase AC power supplies and suppressing the complexity of the structure. The operation circuit (25) is set in a conductive state when the switching circuit (100) for three-phase AC power supply receives the R phase and the N phase. The internal switch (21b) is set in a non-conductive state when the operating circuit (25) is in a conductive state. The contactor (20) electrically connects the input terminal (8bN) and the output terminal (91, 92, 93) when the state of the operation circuit (25) is in the conduction state. A contactor (10) electrically disconnects input terminals (8aR, 8aS, 8aT) and output terminals (91, 92, 93) when an internal switch (21b) is in a non-conductive state.

Description

technical field [0001] The present invention relates to a switching circuit for a three-phase AC power supply capable of handling multiple types of three-phase AC power supplies. Background technique [0002] There are various technologies that utilize three-phase AC power. Patent Document 1 discloses a technology (hereinafter, referred to as related technology A) as an example of using a three-phase AC power supply. In Related Art A, three power conversion units are used. In addition, in Related Art A, the three-phase AC power supply is star-connected to each power conversion unit when the input voltage is high, and the three-phase AC power supply is connected to each power conversion unit when the input voltage is low. Delta connection (delta connection) way to switch control. Accordingly, the withstand voltage of each element of the downstream circuit is ensured against a wide range of input voltages. [0003] Furthermore, in related art A, a thyristor is used as a sw...

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): H02M5/04
CPCH02M5/04H02M1/10H02M5/02H02M3/158
Inventor 长谷川公司
Owner MITSUBISHI ELECTRIC CORP