The invention discloses an axial split-phase
hybrid excitation type magnetic suspension
motor control system, which directly controls the
electromagnetic torque and suspension force of a motor, saves
control delay caused by controlling intermediate quantity, effectively improves the response speed and operation performance of the motor, and meanwhile, in a rotating speed control ring and a
radial displacement control ring, the axial split-phase
hybrid excitation type magnetic suspension
motor control system has the advantages that the
control delay is reduced; according to the method, traditional proportional-integral-differential control is replaced by second-order
sliding mode control with higher robustness and higher response speed, a reference
electromagnetic torque is output after a rotating speed error is adjusted by a second-order sliding mode controller, and further, the
electromagnetic torque of the motor is directly controlled; and after the
radial displacement error is adjusted by the second-order sliding mode controller, reference suspension force is output, and the suspension force of the motor is further directly controlled, so that second-order sliding mode direct torque and direct suspension force are formed, and the response speed, the anti-interference capability and the suspension performance of the magnetic suspension motor can be effectively improved.