Impact of PWM Strategies on RMS Current of the DC-Link Voltage Capacitor of a Dual-Three Phase Drive

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Inverter (VSI), is the occurrence of extra harmonic currents which circulate in the stator windings causing additional losses and constraints on the power component. This paper compares dedicated Pulse Width Modulation (PWM) strategies used for controlling a dual threephase Permanent Magnet Synchronous machine supplied by a six-leg VSI. Since the application is intended for low-voltage (48V) mild-hybrid automotive traction, an additional major constraint arises: the compactness of the drive related to the size of the DC-bus capacitor. Thus, the PWM strategy must be chosen by taking into consideration its impact on both, the motor and the RMS value of DC-bus current.

Reducing root‐mean‐square current stress on the DC link capacitor of a five‐phase electric drive through multiple carrier pulse‐width modulation technique

“…Further assuming that the DC source supplies the entire DC component of the DC link current and the DC link capacitor provides the entire AC component, (9) and (10) show the DC link capacitor current results.…”

“…In the past, different methods to reduce the DC link and RMS current have been presented [2,[6][7][8][9]. In general, the DC link RMS current decreases as the number of phases increase [10].…”

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

“…Because of the interaction between current and voltage components of the same sequence, and due to the existence of only first positive and zero sequence load voltage components, only current components I +1 and I −1 contribute to the instantaneous power. Introducing Equations ( 20) and (21) in Equation ( 19), the instantaneous power becomes…”

Evaluation of DC-Link Voltage Switching Ripple in Multiphase PWM Voltage Source Inverters

“…For example, in [14] the impact of classical PWM modulation, with and without common mode injection on the RMS value of the dc-link current has been studied for dual-three phase induction machine. A PWM strategy dedicated to minimization of the RMS of the dc-link current in dual three-phase drive has been compared in [15] with more conventional PWM techniques. It has been shown that PWM strategies have different effect on the RMS of the dc-link current and on the quality of the output current.…”