Title:
交流電源側に容量性インピーダンスを直列接続したPWMコンバータ
Document Type and Number:
Japanese Patent JP4070321
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the capacity of a switching element by increasing the efficiency of a PWM converter that is connected to an AC power supply with a large internal impedance. SOLUTION: A capacitive impedance Cc is connected in series with each phase of the AC input terminal of a PWM converter part 100, and an AC input terminal is subjected to PWM modulation, so that the equivalent circuit of the PWM converter when viewed from terminals 27-29 becomes a series circuit of the capacitive impedance Cc and a resistive impedance. Since the capacitive impedance Cc is connected in series with the AC input side of the PWM converter part 100 in this manner, a voltage which applied to the switching elements 16-21 of the PWM converter can be reduced, thus reducing the conductive loss and the switching loss of the switching elements 16-21.
Inventors:
Takamitsu Yamamoto
Asaki Watanabe
Satoru Hiji
Takayoshi Tanaka
Gozo Shioda
Asaki Watanabe
Satoru Hiji
Takayoshi Tanaka
Gozo Shioda
Application Number:
JP24961798A
Publication Date:
April 02, 2008
Filing Date:
September 03, 1998
Export Citation:
Assignee:
Railway Technical Research Institute
Toyo Denki Manufacturing Co., Ltd.
Toyo Denki Manufacturing Co., Ltd.
International Classes:
H02J1/02; H02M7/155; H02M1/12; H02M7/12; H02M7/219
Domestic Patent References:
| JP6054540A | ||||
| JP9271101A | ||||
| JP3051192Y2 |
Attorney, Agent or Firm:
Shunichiro Nagasawa