PWM Carrier Displacement in Multi-N-Phase Drives: An Additional Degree of Freedom to Reduce the DC-Link Stress

Michela Diana, Riccardo Ruffo and Paolo Guglielmi
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Michela Diana: Dipartimento Energia, Politecnico di Torino, 10129 Torino, Italy
Riccardo Ruffo: Dipartimento Energia, Politecnico di Torino, 10129 Torino, Italy
Paolo Guglielmi: Dipartimento Energia, Politecnico di Torino, 10129 Torino, Italy

Energies, 2018, vol. 11, issue 2, 1-21

Abstract: The paper presents a particular Pulse Width Modulation (PWM) strategy to reduce the (Direct Current) DC-link capacitor stress for multi-n-phase drives. A multi-n-phase drive is composed of multiple independent systems of n inverter supplying a multi-n-phase electric machine. The paper focused on the investigation of the best phase shifting between carriers for a triple-3-phase drive compared to the 3-phase counterpart in order to reduce the capacitor bench design point. Simulation and experimental results show as the control technique proposed is able to reduce the value of the DC-link capacitor current in any operating condition including fault case. In this sense, the PWM carrier displacement appears like an additional degree of freedom that can be exploited in multi-n-phase drives but also in multi-motor application.

Keywords: DC-link stress; multiphase drives; pulse width modulation; motor drives; power capacitors; fault tolerance; electric vehicles (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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