Title:
誘導性負荷不均衡保護機能を改善した調光回路
Document Type and Number:
Japanese Patent JP2005521377
Kind Code:
A
Abstract:
A protection circuit for protecting a dimmer circuit controlling an inductive load including an imbalance detector for detecting an asymmetrical operation in the load and circuit control means for causing the dimmer circuit to reduce a DC component in the load upon detection of the asymmetrical operation. A load imbalance detector is also disclosed having a load DC component detector, a comparator and a signal generating means for generating a circuit shut down signal if the DC component exceeds a pre-set DC threshold.
Inventors:
Vanderzon, James, Robert
Application Number:
JP2003579514A
Publication Date:
July 14, 2005
Filing Date:
March 25, 2003
Export Citation:
Assignee:
Crypsar Integrated Systems Pty Limited
International Classes:
G05F5/02; H02M1/08; H02M1/15; H02M7/12; H03K17/13; H03K17/16; H05B1/00; H05B39/04; H05B39/08; H05B41/24; H05B41/38; H05B47/10; (IPC1-7): H02M1/08; H05B37/02; H05B41/24
Attorney, Agent or Firm:
Sadayuki Hosoi
Mitsuo Chonan
Ishiwatari Eibo
Nakamura Masamichi
Mitsuo Chonan
Ishiwatari Eibo
Nakamura Masamichi