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Patent Searching and Data


Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/086041
Kind Code:
A1
Abstract:
Provided is a semiconductor device wherein, without incurring a high cost, a brake circuit protection function is rendered inoperable even when an alarm is output in an inverter circuit. This semiconductor device contains inverter circuits and a brake circuit. In protection functional units (81-84) having inverter-circuit-use and brake-circuit-use control circuits arranged on the low side of inverter circuits, when a fault detection unit (84a) detects a fault, protection units (81b, 82b, 83b, 84b) are placed in a protected state by means of fault information exchange terminals (81d, 82d, 83d) and wiring (85). However, when a fault is detected by fault detection units (81a, 82a, 83a) the protection units (81b, 82b, 83b) are placed in a protected state and the protection unit (84b) is not placed in a protected state. Furthermore, when a fault is detected by the fault detection units (81a, 82a, 83a, 84a) an alarm signal is reported to an external device from an alarm output terminal (84e).

Inventors:
SHIMIZU NAOKI (JP)
Application Number:
PCT/JP2016/079466
Publication Date:
May 26, 2017
Filing Date:
October 04, 2016
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
H02P3/18; H02M7/48; H02M7/797
Foreign References:
JP2000341960A2000-12-08
JPH0530771A1993-02-05
JP2003088093A2003-03-20
US20080129238A12008-06-05
Attorney, Agent or Firm:
HATTORI, Kiyoshi (JP)
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