This paper illustrates an algorithm to balance the voltages across the DC-link capacitors of a three-level multiphase inverter feeding a star-connected load with an odd number of phases. The proposed strategy keeps the DC-link capacitors balanced in any operating condition and minimizes the low-frequency voltage oscillations, even during open-phase faults and with non-sinusoidal output currents. Finally, the paper identifies the operating region where the voltage oscillations of the DC-link capacitors can be canceled. The developed algorithm can maintain constant voltages even if the capacitors are unbalanced, and its performance is compared to that of other carrier-based algorithms. Experimental tests are carried out on a five-phase induction motor in healthy and faulty conditions.

Vancini L., Mengoni M., Rizzoli G., Zarri L., Tani A. (2022). Voltage Balancing of the DC-Link Capacitors in Three-Level T-Type Multiphase Inverters. IEEE TRANSACTIONS ON POWER ELECTRONICS, 37(6), 6450-6461 [10.1109/TPEL.2021.3137083].

Voltage Balancing of the DC-Link Capacitors in Three-Level T-Type Multiphase Inverters

Vancini L.;Mengoni M.;Rizzoli G.;Zarri L.
;
Tani A.
2022

Abstract

This paper illustrates an algorithm to balance the voltages across the DC-link capacitors of a three-level multiphase inverter feeding a star-connected load with an odd number of phases. The proposed strategy keeps the DC-link capacitors balanced in any operating condition and minimizes the low-frequency voltage oscillations, even during open-phase faults and with non-sinusoidal output currents. Finally, the paper identifies the operating region where the voltage oscillations of the DC-link capacitors can be canceled. The developed algorithm can maintain constant voltages even if the capacitors are unbalanced, and its performance is compared to that of other carrier-based algorithms. Experimental tests are carried out on a five-phase induction motor in healthy and faulty conditions.
2022
Vancini L., Mengoni M., Rizzoli G., Zarri L., Tani A. (2022). Voltage Balancing of the DC-Link Capacitors in Three-Level T-Type Multiphase Inverters. IEEE TRANSACTIONS ON POWER ELECTRONICS, 37(6), 6450-6461 [10.1109/TPEL.2021.3137083].
Vancini L.; Mengoni M.; Rizzoli G.; Zarri L.; Tani A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/844542
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