Modulated wave resolver device and interpolation correction method for rotational angle measurement

摘要

The problem to be solved is the setting of a high accuracy error correction method of the rotational angle of the modulated wave resolver device and a high precision error correction value using the rotation angle measuring control device.A method of detecting a rotation angle according to the present invention isThe preparation process for storing the rotation angle correction information in advance to the first storage element for correcting the rotation angle for each predetermined first section of the resolver of the modulated wave resolver device andA signal generator generates and outputs a modulated wave generation signalA modulated wave generation circuit generates a modulated wave signal from the modulated wave generation signalDriving the input Coyle drive of the modulated wave resolver deviceOutput of the modulated wave resolver device from the output signal from CoyleThe rotation angle is detected through the rotation angle detection circuit and the rotation angle detection value is output.From the rotation angle detection valueThe first section including the rotation angle detection value is determined.The rotation angle correction information at both ends of the first section stored in the first storage element is read.By linearly interpolating the rotation angle correction informationThe rotation angle correction value of the rotation angle detection value is calculated.Diagram