High-precision rotation angle detection method for magnetic suspension sheet type motor

The invention relates to a high-precision rotation angle detection method for a magnetic suspension sheet type motor, and the method comprises the steps: firstly designing a Hall collection circuit comprising N linear Hall sensors, and enabling the Hall collection circuit to be disposed at a certain plane position above or below a motor rotor, the planar position peak magnetic field intensity is not higher than the maximum range, and the magnetic field is less influenced by the winding magnetic field; designing and installing a calibration tool which is coaxial with the rotor and is provided with a rotary transformer; before a formal test, a Hall acquisition circuit is used for acquiring the magnetic field intensity of a motor rotor through N linear Hall sensors, and a rotor rotation angle theta Hall is obtained through calculation; measuring an actual rotation angle theta of the rotor by using the calibration tool, and calculating a compensation value by using a formula theta-theta Hall; during actual measur