Title:
A protection instrument of an energization circuit
Document Type and Number:
Japanese Patent JP5944729
Kind Code:
B2
Abstract:
A switching circuit protector switches a semiconductor device (11) provided in a switching circuit connecting a power supply (VB) to a load (RL), from a PWM drive state to a DC drive state when an estimated temperature of a cable of the switching circuit estimated by a temperature estimator (22) exceeds a threshold temperature (Tth), in the state where the semiconductor device (11) is controlled to operate in the PWM drive state to drive the load (RL). Therefore, when an overcurrent is caused in the cable, the estimated temperature exceeds the threshold temperature (Tth) so as to break the semiconductor device (11). Accordingly, the switching circuit can surely be protected by the switching circuit protector.
More Like This:
Inventors:
Keisuke Ueda
Akinori Maruyama
Yoshihide Nakamura
Yoshinori Ikuta
Akinori Maruyama
Yoshihide Nakamura
Yoshinori Ikuta
Application Number:
JP2012098899A
Publication Date:
July 05, 2016
Filing Date:
April 24, 2012
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
H02H5/04
Domestic Patent References:
| JP2009226984A | ||||
| JP2010172191A |
Foreign References:
| WO2010140474A1 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu