Title:
THREE-PHASE WIDE RANGE INPUT POWER CONVERTING CIRCUIT
Document Type and Number:
Japanese Patent JP3900444
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To attain easy design, high efficiency, and downsizing of a winding part by switching three-phase AC power supply and a power conversion part to a star connection when high the input voltage is high and a delta connection, when input voltage is low.
SOLUTION: In the AC input of a single-phase full wave rectifier, when a U-phase line, a V-phase line, a W-phase line are connected to respective blocks of power conversion parts 17, 18, 19, the V-phase line of a three-phase AC power supply line is connected to a connecting point between the anode of a thyristor 20 and the cathode of a thyristor 21. The W-phase and U-phase lines of the three-phase AC power supply line are connected to the connection between the anodes of the thyristors 22, 24, and the cathodes of the thyristors 23, 24 respectively. At inputting of a three-phase 200 V, an on signal is inputted into the gates of the thyristors 20-25, and turns into a delta connection state. At inputting of a three-phase 400 V, the thyristors 20-25 are turned off, so that it turns into a star connection state. It is thus possible to attain easy design, high efficiency, and downsizing of a winding part.
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Inventors:
Shinya Ofuji
Yoshiaki Matsuda
Yoshiaki Matsuda
Application Number:
JP9666998A
Publication Date:
April 04, 2007
Filing Date:
March 25, 1998
Export Citation:
Assignee:
Shindengen Industry Co., Ltd.
International Classes:
H02J3/00; H02M7/155; H02M7/12; H02M7/17; (IPC1-7): H02M7/155; H02M7/17; //H02J3/00
Domestic Patent References:
| JP9247903A | ||||
| JP7031150A | ||||
| JP9149642A | ||||
| JP8126328A |