Title:
POWER SUPPLY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/175722
Kind Code:
A1
Abstract:
A power supply apparatus (20) including a push-pull-type inverter circuit (21) that outputs AC power to a capacitive discharge load (31) is provided with a control device (40) that alternately drives switches (SW1, SW2) by using a drive frequency not higher than but approximate to the resonance frequency of a resonance circuit (30) having a discharge load capacity and having a secondary side equivalent value of a leakage inductance between the primary side and the secondary side of a transformer (Tr), and that calculates the ratio of: the outputtable power of the inverter circuit which is determined in accordance with the drive frequency and the output voltage of the inverter circuit; and a target value of supply power to be supplied to the discharge load. In a predetermined cycle, the control device uses, as an output period, a time period corresponding to the mathematical product of the predetermined cycle and the ratio calculated by a calculation unit, and alternately turns on the switches for the output period.
Inventors:
SHIRAKAWA KAZUHIRO (JP)
KANESAKI MASAKI (JP)
TANI KEISUKE (JP)
TSUTSUI TAKURO (JP)
KANESAKI MASAKI (JP)
TANI KEISUKE (JP)
TSUTSUI TAKURO (JP)
Application Number:
PCT/JP2017/013972
Publication Date:
October 12, 2017
Filing Date:
April 03, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2008032425A1 | 2008-03-20 |
Foreign References:
| JP2005312284A | 2005-11-04 | |||
| JPS62163581A | 1987-07-20 | |||
| JP2009026497A | 2009-02-05 | |||
| JP2001298957A | 2001-10-26 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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