Based on Vector Control and Design of Dual-motor Control System for Electric Wheelchair

Based on the analysis of existing electric wheelchairs, this paper designs a simple electric wheelchairs with no mechanical steering mechanism and relying on differential control to realize turning and straight running. The structure, mathematical model and control method of permanent magnet synchronous motor used in electric wheelchair are analyzed. The double closed-loop vector control model of current and speed is established for a single permanent magnet synchronous motor used in electric wheelchair. The working principle of vector control is analyzed. On the basis of vector control of a single permanent magnet synchronous motor, considering the whole control strategy of the electric wheelchair, the cross-coupling control strategy is adopted in the speed loop, and a reasonable controller is designed to realize the coordinated control of the two motors. The simulation model of electric wheelchair drive motor is built, and the dual FOC algorithm is applied to realize the simultaneous control of two direct drive motors of electric wheelchair and reduce the delay of control loop.