Control method of direct-drive permanent magnet synchronous motor, traction controller and storage medium

The invention provides a control method of a direct-drive permanent magnet synchronous motor, a traction controller and a storage medium. The method comprises the steps of obtaining a compensation phase angle of a rotor of the direct-drive permanent magnet synchronous motor according to a control interruption period, a modulation carrier period and the current angular speed of the rotor of the direct-drive permanent magnet synchronous motor; obtaining a current actual control phase angle according to the compensation phase angle; obtaining a current expected control phase angle according to the current d-axis voltage given value and the current q-axis voltage given value; and performing the online correction on the current actual control phase angle according to the proportional deviationand the integral deviation of the current expected control phase angle and the current actual control phase angle. According to the invention, the error phase angle caused by the time delay corresponding to control interrupti