| 摘要 |
<p>The rotation angle detection apparatus comprises a rotation angle detection unit (1) for generating the first angle detection signal and the second angle detection signal of the sine waveform having a constant maximum amplitude and the same period and having approximately 1/4 wavelength phase difference concomitantly with the rotation of the rotor connected to a rotating body, a memory unit (3) for storing the first angle detection signal and the second angle detection signal, and a control unit (2), wherein the control unit (2) continuously detects the amplitude of the angle detection signal and the second angle detection signal, compares the detected amplitude absolute value of the first angle detection signal and amplitude absolute value of the second angle detection signal, calculates the basic rotation angle of the rotating body based on the arctangent angle of the quotient value obtained by dividing the smaller amplitude absolute value by the larger amplitude absolute value, sets a plurality of angle processing cases separately for polarities and amplitude ranges of the amplitude value of the first angle detection signal and the amplitude value of the second angle detection signal that have been calculated, converts the detected basic rotation angle to the different angle value for each of the plurality of angle processing cases that have been set as described hereinabove, and the rotation angle of the rotating body is thereby detected. <IMAGE></p> |
