ABSTRACT The research on the five phase (5‐phase) motor drive is increasing due to its lower switching stress, loss and harmonic content. The 5‐phase neutral point clamped (NPC) inverter is preferred as it has less electromagnetic interference and high efficiency. The permanent magnet synchronous motor (PMSM) has the advantage of reduced noise attributable to sinusoidal back EMF, which is desired. The control technique is required to drive the 5‐phase PMSM and operate in the desired conditions. The field oriented control (FOC) technique for a 5‐phase PMSM drive is discussed in this article, where the maximum torque is obtained by maintaining the stator and rotor magnetic fields at 90°. Generally, the 5‐phase FOC technique produces four signals from the Clarke transformation and control the inverter, which increases the size and cost of the drive system. Also, the time response is higher, as many signals are to be compared to give the respective error signals. To reduce this drawback, the proposed FOC technique considers only two control signals for controlling through the extended Clarke transformation (ECT) technique. This reduces the computational complexity and the time response of the motor drive. Although the conventional FOC controls the inverter, the current total harmonic distortion (THD) and motor torque ripple are high. Thus, hysteresis current controlled–FOC (HCC–FOC) with ECT is proposed in this paper, in which the current parameter is directly controlled and the pulse is generated to reduce the current THD and torque ripple. The simulation for the direct and HCC–FOC technique through MATLAB/Simulink software is performed. Laboratory‐scale experiments are conducted and the corresponding results are observed. The x–y trajectory plot is obtained for HCC–FOC and it shows that the performance of PMSM is smoother.
Santhakumar et al. (Thu,) studied this question.