(19)
(11) EP 2 540 594 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A2)

(48) Corrigendum issued on:
13.03.2013 Bulletin 2013/11

(43) Date of publication:
02.01.2013 Bulletin 2013/01

(21) Application number: 12173351.3

(22) Date of filing: 25.06.2012
(51) International Patent Classification (IPC): 
B62D 5/04(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 30.06.2011 JP 2011145990

(71) Applicant: JTEKT CORPORATION
Osaka-shi Osaka 542-8502 (JP)

(72) Inventor:
  • Okumura, Shigekazu
    Osaka-shi,, Osaka 542-8502 (JP)

(74) Representative: Winter, Brandl, Fürniss, Hübner, Röss, Kaiser, Polte - Partnerschaft 
Bavariaring 10
80336 München
80336 München (DE)

   


(54) Vehicle steering system


(57) When a short-circuited FET is identified as one of low-side FETs (31UL, 31VL, 31WL), maximum phase voltages of three phases are detected when a steering operation is performed by a driver, and the detected maximum phase voltages of the three phases are compared with one another to identify a short-circuit phase. On the other hand, when a short-circuited FET is identified as one of high-side FETs (31UH, 31VH, 31WH), minimum phase voltages of the three phases are detected when a steering operation is performed by the driver, and the detected minimum phase voltages of the three phases are compared with one another to identify a short-circuit phase.