Title:
回転角検出装置
Document Type and Number:
Japanese Patent JP5776925
Kind Code:
B2
Abstract:
A rotation angle calculation unit calculates a zero-crossing time point when a zero-crossing is detected for an output signal V1 or an output signal V2. The rotation angle calculation unit calculates a time interval (zero-crossing interval) between the zero-crossing time point calculated this time for t he output signal V 1 or V2 for which the zero-crossing is detected and the zero-crossing time point calculated the last time for this output signal. The rotation angle calculation unit identifies the magnetic pole presently sensed by a magnetic sensor corresponding to the output signal for which the zero-crossing is detected, based on the calculated zero-crossing interval, the sum of zero-crossing intervals that is calculated last based on the output signals of the magnetic sensor over one turn of a rotor, the rotation direction of the rotor, and the content of an amplitude correction table (a first or second table) for the magnetic sensor.
Inventors:
Takeshi Ueda
Komatsu Hitoto
Komatsu Hitoto
Application Number:
JP2010281697A
Publication Date:
September 09, 2015
Filing Date:
December 17, 2010
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
G01D5/244; H02K29/08
Domestic Patent References:
| JP8304109A | ||||
| JP200896164A | ||||
| JP2246787A | ||||
| JP2002257590A |
Attorney, Agent or Firm:
Inaoka cultivation
Mio Kawasaki
Hideyuki Kayama
Mio Kawasaki
Hideyuki Kayama