Title:
【発明の名称】電力変換装置および無停電電源装置
Document Type and Number:
Japanese Patent JP3005804
Kind Code:
B2
Abstract:
PURPOSE:To reduce leak current by inserting a reactor into an AC line and connecting at least one phase of the AC line through a capacitor with a DC line thereby constituting a high frequency filter. CONSTITUTION:Reactors 6, 7, 8 are inserted into AC lines A, B, C and at least one phases of the AC lines A, B, C are connected through capacitors 9, 10, 11 with DC lines P, N thus constituting a high frequency filter. Transistors T1-T6 are then subjected to high frequency switching thus absorbing the high frequency voltage for the AC and DC lines A-C, P, N through the reactors 6-8 and the capacitors 6-8. Since a low frequency voltage functions between the AC and DC lines A-C, P, N, the stray capacitance between the DC lines P, N and the ground does not produce a leak current which causes any trouble.
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Inventors:
Keizo Shimada
Akira Kobayashi
Akira Kobayashi
Application Number:
JP1207590A
Publication Date:
February 07, 2000
Filing Date:
January 22, 1990
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02J3/01; H02J9/06; H02M1/12; H02M7/06; H02M7/12; H02M7/155; H02M7/219; H02M7/48; (IPC1-7): H02M7/48; H02M1/12; H02M7/12
Domestic Patent References:
| JP62230359A | ||||
| JP5771277A | ||||
| JP62123961A | ||||
| JP33667A |
Other References:
【文献】国際公開89/4084(WO,A1)
Attorney, Agent or Firm:
Tatsuyuki Unuma