ABSTRACT
The dynamic model of the permanent magnet synchronous machine (PMSM) is derived using a two-phase motor in direct and quadrature axes. The normalized model of the PMSM is derived by defining the base variables both in the abc and dqo variables. The ideal model for perturbation to get the linearized model is that one with steady-state operating state variables as dc values. For a better operation of the PMSM, consider a simple closed loop control by which the rotor position is utilized to set phase a voltage as a sinusoid of rotor position and a fixed angle a. The chapter discusses the zero sequence inductance is derived as it is required in fault studies that create imbalance in the voltages and currents. The dynamic model could be put to use in the design to evaluate the instantaneous effects of varying voltages/currents, stator frequencies and torque disturbance on the machine and drive systems.
