Input ripple analysis of five-phase pulse width modulated inverters
Dahono P.A.a, Denia, Akbarifutra C.P.a, Rizqiawan A.a
a Institute of Technology Bandung, School of Electrical Engineering and Informatics, Indonesia
Abstract
Input ripple analysis of five-phase pulse width modulated (PWM) inverters is presented. The analytical expressions for the rms value of the input current and voltage ripples as a function of the PWM reference signal are derived. Similar to three-phase PWM inverters, the input current ripple does not depend on the employed reference signal, so the ripple cannot be minimised by changing the shape of reference signal. On the other hand, different from three-phase PWM inverters, it is shown that a pure sinusoidal signal is the optimum reference signal that produces a minimum input voltage ripple in five-phase PWM inverters. Input voltage ripples under several modulation techniques are compared. Experimental results are included to verify the proposed analysis method. © 2010 The Institution of Engineering and Technology.
Author keywords
Analysis method,Analytical expressions,Input current,Input current ripple,Input voltages,Modulation techniques,Pulse-width-modulated,Pulse-width-modulated inverter,PWM inverter,Reference signals,Ripple analysis,Sinusoidal signals,Voltage ripples