Power Losses Distribution in SiC Inverter Based Electric Motor Drives

This article is an investigation on the analysis and performance of the passive soft-switching snubber inverter (PSSSI). The efficiency of the power cable and electric motor used in industrial electric drive applications is also taken into consideration. As reported in the literature, the PSSSI is u...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2019-11, Vol.55 (6), p.7843-7853
Main Authors: Pulsinelli, Francesco, di Benedetto, Marco, Lidozzi, Alessandro, Solero, Luca, Crescimbini, Fabio
Format: Article
Language:English
Subjects:
Capacitors
Circuits
Electric drives
Electric motor overvoltage
Electric motors
Electric power distribution
Electric power loss
Inverters
passive soft-switching snubber inverter (PSSSI)
Power cables
Power efficiency
power losses
Semiconductor devices
Silicon carbide
snubber circuit
Snubbers
Switches
Switching
three-phase inverter
Voltage control
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Summary:This article is an investigation on the analysis and performance of the passive soft-switching snubber inverter (PSSSI). The efficiency of the power cable and electric motor used in industrial electric drive applications is also taken into consideration. As reported in the literature, the PSSSI is used to reduce the overvoltage on the motor side when both voltage source inverters are equipped with high-speed semiconductor devices and a long power cable is used. The PSSSI configuration derives from the conventional two-level inverter by adding a diode-capacitor snubber for each switching power device. Furthermore, an additional circuit is used to recover energy from the snubber capacitors. The three-phase PSSSI is carefully designed taking into account several system parameters, such as the dV/dt, the length of the power cable between the motor and the inverter, the gate resistance of the switches, the dead-time, the snubber capacitors' value, and the switching frequency. Experimental results show a good efficiency performance of the entire electric drive as well as a reduced dV/dt at the electric motor terminals when the PSSSI is used compared to when the two-level three-phase inverter is adopted.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2019.2941864