| 摘要 |
<p>A first third harmonic component removing portion calculates an approximate value (sinθ)n of a signal sinθ 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 (cosθ)n of a signal cosθ 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 (sinθ)n of sinθ, which has been calculated by the first third harmonic component removing portion and the approximate value (cosθ)n of cosθ, which has been calculated by the second third harmonic component removing portion.
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