Title:
METHOD AND DEVICE FOR CONTROLLING SYNCHRONIZATION AND UNINTERRUPTIBLE POWER UNIT
Document Type and Number:
Japanese Patent JP3561119
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To constitute a synchronization controller which is not affected by the distortion and unbalance of AC signals of software using a microprocessor, etc.
SOLUTION: Three-phase AC signals are synchronized to the output of a frequency divider by means of a variable frequency circuit 13, by executing a program on a processor 21 at every divided frequency value set by means of the frequency divider 27, converting the three-phase AC signals into vectors on rotational coordinates in accordance with the program, then, binding the phase differences between the vectors and the reference axes of the rotational coordinates, and outputting the signals of the phase difference signals to the variable frequency circuit 13 from the processor 21 after amplification.
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Inventors:
Yuma Yamamoto
Application Number:
JP23865797A
Publication Date:
September 02, 2004
Filing Date:
September 03, 1997
Export Citation:
Assignee:
Toshiba Mitsubishi Electric Industrial Systems Co., Ltd.
International Classes:
G01R25/00; H02J3/38; H02J9/06; H02M1/08; H02M7/48; (IPC1-7): H02M1/08; G01R25/00; H02J3/38; H02J9/06; H02M7/48
Domestic Patent References:
| JP55034851A | ||||
| JP5184135A | ||||
| JP5176525A | ||||
| JP1101175U |
Attorney, Agent or Firm:
Michiteru Soga
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order