| 发明名称 |
DC POWER SUPPLY SYSTEM AND CONTROLLING METHOD |
| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce an unload loss due to electrical continuity to a commutator unit in unload state in addition to power dissipation due to performance degradation of the commutator unit. <P>SOLUTION: A DC power supply system includes: a rectifying device 3 containing rectifier units 4<SB>1</SB>-4<SB>n</SB>, which are connected in parallel with each other and each of which converts AC power from a commercial power supply 1 or an engine generator 2 to DC power; a working unit number determination circuit 51 for determining the optimum number of working commutator units based on the total output current of the rectifying device 3 and outputting working commands to commutator units in optimum number out of two or more rectifier units 4<SB>1</SB>-4<SB>n</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT |
| 申请公布号 |
JP2009195079(A) |
申请公布日期 |
2009.08.27 |
| 申请号 |
JP20080035979 |
申请日期 |
2008.02.18 |
| 申请人 |
NIPPON TELEGR & TELEPH CORP <NTT> |
发明人 |
BABASAKI TADATOSHI;MINO MASATO;MATSUO HIDENORI |
| 分类号 |
H02J1/00;H02J3/46;H02J7/34;H02M7/08 |
主分类号 |
H02J1/00 |
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