(19)
(11) EP 2 743 645 A8

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

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
13.08.2014 Bulletin 2014/33

(43) Date of publication:
18.06.2014 Bulletin 2014/25

(21) Application number: 13196423.1

(22) Date of filing: 10.12.2013
(51) International Patent Classification (IPC): 
G01D 5/244(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: 12.12.2012 JP 2012271639

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

(72) Inventors:
  • Takaki, Takeshi
    Osaka-shi, Osaka 542-8502 (JP)
  • Kariatsumari, Yuji
    Osaka-shi, Osaka 542-8502 (JP)
  • Shimizu, Yoshinobu
    Osaka-shi, Osaka 542-8502 (JP)

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

   


(54) Phase difference detector and rotation angle detection device including the same


(57) In a phase difference detector, a first phase difference computation unit computes a value of E(i) · C corresponding to one and the same given magnetic pole sensed by the two magnetic sensors with use of six output signals sampled at three different timings while the two magnetic sensors are sensing the given magnetic pole when a rotary body is rotating. E is an angular width error correction value, and C is a phase difference between two signals (S1, S2). The first phase difference computation unit executes this process until values of E(i) · C corresponding to all the magnetic poles are computed. After that, the first phase difference computation unit computes the phase difference (C) between the output signals (S1, S2) with use of the values of E(i) · C corresponding to all the magnetic poles and the number (m) of the magnetic poles.