Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
OVERCURRENT DETECTION CIRCUIT AND POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/193527
Kind Code:
A1
Abstract:
An overcurrent detection circuit (50) is provided with: a di/dt detection circuit (10) that detects di/dt of a current Ie flowing in an emitter of an IGBT (121); a control circuit (14) that detects whether or not the current Ie is an overcurrent, on the basis of di/dt, and outputs a detection result to a drive circuit (16); and a mask circuit (12) that sets a masking period for masking the operation of overcurrent determination in the control circuit (14).

Inventors:
UCHIDA, Kenta (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
NAKAGAWA, Ryosuke (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/015618
Publication Date:
October 25, 2018
Filing Date:
April 18, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02M7/48; H02M1/00; H02M1/08; H03K17/08
Foreign References:
JP2017005836A2017-01-05
JP3409620B22003-05-26
JP2004032641A2004-01-29
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
Download PDF: