Title:
チョッパー電源のための保護装置および自動車用照明装置
Document Type and Number:
Japanese Patent JP4769466
Kind Code:
B2
Abstract:
The device has a resistor connected to a primary, connected to a power source, of a voltage transformer of a cutting feed in series with a capacitor, where the transformer`s secondary is connected to a load. The series association creates an image of current flowing in a power switch (18), and a unit detects critical current level on the image. A pulse width modulator (30) modifies conducting state of the switch during the detection.
Inventors:
Philip Clavier
Application Number:
JP2005020469A
Publication Date:
September 07, 2011
Filing Date:
January 28, 2005
Export Citation:
Assignee:
VALEO VISION
International Classes:
F21V15/00; H02M3/28; H02M3/335; H05B41/285; H05B41/292; F21W101/10; F21Y101/00
Domestic Patent References:
| JP2000340385A | ||||
| JP61173671A | ||||
| JP2003151787A |
Foreign References:
| US20030102816 |
Attorney, Agent or Firm:
Soichi Takezawa
Noritsugu Nakama
Noritsugu Nakama