Title:
ISOLATED SWITCHING POWER SOURCE FOR THREE-PHASE AC
Document Type and Number:
WIPO Patent Application WO/2018/211893
Kind Code:
A1
Abstract:
This isolated switching power source, into which three-phase AC is inputted, performs efficient power factor improvement and power conversion by means of a simple configuration. The power source is provided with: input terminals R, S, T; positive electrode and negative electrode output terminals P, N; three transformers Tr, Ts, Tt of which the primary coil is connected to an input terminal; three switching elements Qr, Qs, Qt which allow or block conduction through the current paths between the other end of the primary coils of the three transformers and a input-side reference potential terminal; a sub-capacitor connected between one end of the secondary coils of the three transformers and the negative electrode output terminal; first, second and third rectifier elements D1, D2, D3 connected between the other end of the secondary coil of the three transformers and the positive electrode output terminal; fourth, fifth and sixth rectifier elements D4, D5, D6 connected between the other end of the secondary coils of the three transformers and the negative electrode output terminal; and a smoothing capacitor connected between the positive electrode output terminal and the negative electrode output terminal.
Inventors:
HANEDA MASAJI (JP)
Application Number:
PCT/JP2018/015828
Publication Date:
November 22, 2018
Filing Date:
April 17, 2018
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
H02M7/12
Foreign References:
| JP2002199731A | 2002-07-12 | |||
| JP2002058250A | 2002-02-22 | |||
| JP2013516953A | 2013-05-13 | |||
| JP2002034249A | 2002-01-31 |
Attorney, Agent or Firm:
KOJIMA Takiro (JP)
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