Invention Grant
- Patent Title: Rotation angle detection apparatus
- Patent Title (中): 旋转角度检测装置
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Application No.: US13408415Application Date: 2012-02-29
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Publication No.: US08942952B2Publication Date: 2015-01-27
- Inventor: Takeshi Ueda
- Applicant: Takeshi Ueda
- Applicant Address: JP Osaka
- Assignee: Jtekt Corporation
- Current Assignee: Jtekt Corporation
- Current Assignee Address: JP Osaka
- Agency: Oliff PLC
- Priority: JP2011-051637 20110309
- Main IPC: G01B7/30
- IPC: G01B7/30 ; G06F19/00 ; G01D5/244 ; G01D5/245
Abstract:
A first third harmonic component removing portion calculates an approximate value (sin θ)n of a signal sin θ that is an output signal of a first magnetic sensor from which third harmonic components have been removed. A second third harmonic component removing portion calculates an approximate value (cos θ)n of a signal cos θ that is an output signal of a second magnetic sensor from which third harmonic components have been removed. A rotation angle calculation portion calculates a rotation angle θ of a rotor based on the approximate value (sin θ)n of sin θ, which has been calculated by the first third harmonic component removing portion and the approximate value (cos θ)n of cos θ, which has been calculated by the second third harmonic component removing portion.
Public/Granted literature
- US20120232839A1 ROTATION ANGLE DETECTION APPARATUS Public/Granted day:2012-09-13
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