ELECTRIC ANGLE ACQUISITION SYSTEM, ELECTRIC ANGLE ACQUISITION METHOD, ELECTRIC ANGLE ACQUISITION PROGRAM, ELECTRIC ANGLE ACQUISITION CHARACTERISTIC MEASURING SYSTEM, ELECTRIC ANGLE ACQUISITION CHARACTERISTIC MEASURING METHOD AND ELECTRIC ANGLE ACQUISITION CHARACTERISTIC MEASURING PROGRAM

摘要

To provide technology that acquires an accurate electric angle.SOLUTION: Provided is an electric angle acquisition system for acquiring the electric angle of a one-phase excitation two-phase output rotation detector on the basis of the excitation and output signals of the rotation detector. The electric angle acquisition system comprises: an excitation signal acquisition unit for acquiring the excitation frequency component of the excitation signal by Fourier conversion; an output signal acquisition unit for acquiring the excitation frequency component of the two-phase output signals by Fourier conversion; a phase relationship acquisition unit for acquiring a phase relationship between the excitation signal and the two-phase output signals on the basis of the excitation frequency component of the excitation signal and the excitation frequency component of the two-phase output signals; an amplitude acquisition unit for acquiring the amplitude of the two-phase output signals on the basis of the excitation frequency component of the two-phase output signals; and an electric angle acquisition unit for acquiring the electric angle of the rotation detector on the basis of the phase relationship and the amplitude of the two-phase output signals.SELECTED DRAWING: Figure 1