Direct torque control method for multi-motor system

The present invention discloses a system for multi-motor direct torque control method, first establish a system of multi-motor torque, flux evaluation function; discrete, averaging process for the evaluation function, access to torque, flux Factor table; then generates a torque reference value by more than a single motor coupled to the motor controller system deviation; the final calculation of the reference torque value pτ * impact factor and influence factor flux reference value pλ *, ​​and the objective function, the torque, flux factor table, select the objective function value of the minimum inverter voltage vector control for multi-motor system; the present invention can realize the multi-motor system speed torque response, while reducing the torque ripple in steady state operation; the present invention the impact of the establishment of torque, flux factor in the table can be comprehensive, direct, fine reflects the different inverter voltage vector at different duty cycles effect on multi-motor system electromagnetic torque and stator flux magnitude .