This paper proposes a method based on the quadratic programming (QP) sequence for solving optimization current , which ensure the minimal operation loss of the motor, of control system for interior permanent magnet synchronous motor (IPMSM) for electric vehicle. First of all, the efficiency optimization of IPMSM is modeled as the programming problem , and transformed it into linear constraint QP sequence. The convergence of QP series solution and the identity of the solution of the primal programming problem are proved ant it. By simulation analysis, the faster convergence, and a small amount of calculation, make it more suitable for the efficiency digital control of IPMSM control system.
