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Title:
PARALLEL OPERATION METHOD FOR INVERTER, POWER SUPPLY UNIT FOR INVERTER AND INVERTER POWER SUPPLY UNIT FOR LIGHTING DISCHARGE LAMP
Document Type and Number:
Japanese Patent JP3269010
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To suppress a high frequency current flowing to the power supply side by driving a plurality of inverter power supply units with different phase and averaging the instantaneous value of currents flowing to the power supply side due to the phase difference.
SOLUTION: A phase setting means sets the driving phase of an inverter INV depending on the number of inverter power supply units 10 connected with a power supply. Consequently, both even number parallel operation and odd number parallel operation can be dealt with practically. The inverter power supply units 10 comprise M inverters INV which are driven with a phase difference of 360°/M or 180°/M from each other. Consequently, an optimal parallel operating state can be configured by simply connecting inverter power supply units 10 with a power supply and then connecting a load. Consequently, it can be operated practically as an easy-to-handle inverter power supply unit 10 while suppressing high frequency current flowing to the power supply side.


Inventors:
Noda, Makoto
Futami, Takeo
Application Number:
JP1997000179869
Publication Date:
March 25, 2002
Filing Date:
July 04, 1997
Export Citation:
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Assignee:
SANYO ELECTRIC WORKS LTD
International Classes:
H05B41/24; H02J3/38; H02M7/06; H02M7/12; H02M7/48; (IPC1-7): H02M7/48; H02J3/38; H02M7/06; H05B41/24
Attorney, Agent or Firm:
草野 卓 (外1名)