FPGA based five-phase sinusoidal PWM generator

Multiphase machine has became popular in many rotational drive applications due to its reliability, high efficiency and high quality of waveforms. Moreover, this machine (e.g. 5-phase induction machine) can provide more options for selecting the most optimum voltage vector since the number of switching devices of the inverter increases that can enhance torque capability and improve dynamic performances. However, the great advantageous offered cannot be realized if the switching and control strategy performed at very low sampling frequency which does not guarantee for the multiphase drive to operate at optimum operations. This paper presents the realization of five-phase sinusoidal PWM signal generator at fast sampling frequency using one-chip programmable gate array (FPGA). It can be shown that the generation of sinusoidal PWM using FPGA can perform the switching frequency of the inverter at 40 kHz switching frequency that may raise potential for excellent drive performances.