This paper proposes field weakening control method of the look-up table based permanent magnet synchronous machine(PMSM)with interpolation error compensation.The look-up table based control method has robust control characteristic than other control methods which use linear controller for current reference generation.However,it is impossible to store all current references under all circumstances for torque commands.General look-up table based control method using two input parameters,in order to mitigate the effect of discretely stored data,two-dimension-interpolation method(2D-Interpolation)is used for linear interpolating between discontinuous data.However,due to the current trajectories of PMSM are generally ellipsoidal,the error is occurred between linearly interpolated and controllable current references.This paper proposes a method to compensate this interpolation error using feedforward controller for fast compensation.The improvement of proposed method is verified by experiment and simulation.
展开▼
