Title:
SELF-EXCITATION RESONANCE TYPE INVERTER CIRCUIT
Document Type and Number:
Japanese Patent JP3654000
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make executable the output stabilizing control and necessary variable output control without providing a resistor for detecting increase of current and a measure for discharge to an off-control circuit, by controlling on period of a main switching element depending on the charging time of a capacitor for off-control.
SOLUTION: A self-excitation resonance type inverter circuit is composed of a drive circuit 11, a DC/AC converting circuit 12, an on-control circuit 13 and an off-control circuit 14. Here, the off-control circuit 14 is provided with the off-control capacitor Q141 which is charged via a feedback coil L13d energized depending on a drain current of the main switching element FETQ12 of a DC/AC converting circuit 12. The on-period of FETQ12 is controlled depending on this charging time and FETQ12 is turned OFF when the ON period has passed. As a result, the ON-OFF operation of FETQ12 can be controlled without providing a resistor for detecting increase of the drain current of FETQ12 to easily execute the output stabilizing control and variable output control.
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Inventors:
Hiroyasu Kitamura
Hideaki Abe
Hideaki Abe
Application Number:
JP23960798A
Publication Date:
June 02, 2005
Filing Date:
August 26, 1998
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS,LTD.
International Classes:
H02M7/537; H02M7/5383; H02M7/53862; H02M7/5387; (IPC1-7): H02M7/5383; H02M7/537; H02M7/5387
Domestic Patent References:
| JP10191575A | ||||
| JP9233849A | ||||
| JP8080042A | ||||
| JP57027884U |
Attorney, Agent or Firm:
Keisei Nishikawa
Atsuo Mori
Atsuo Mori