For an Electrical Vehicle, the power is delivered from the battery pack to the electric
motor through the use of power converter. Many research projects have been conducted
in improving the efficiency of traction inverters. Inverter topologies are categorized
based on the number of voltage levels of the inverter output phase voltage. The
conventional 2-level Voltage Source Inverter (VSI) is commonly used as a traction
inverter due to its simple structure. Due to the recent trend in utilizing higher DClink
voltage in traction motor drives to achieve a higher power rating, multi-level
inverters are gaining attention to replace the conventional VSI in EV powertrain.
Multi-level voltage source inverters (MLVSI) have been widely adopted in high-power
converters and medium-voltage drives. There are four major categories of
MLVSI: the Flying Capacitor (FC), Neutral Point Clamped (NPC), Cascaded and
Hybrid. The power rating of the MLVSI increases with the increase of inverter levels,
but the size, number of switching devices, cost and control difficulty also increases.
Due to the above reasons, 3-level NPC can be a good solution for traction inverters.
Due to the structure and control limitation, Diode Clamp NPC suffers from uneven
loss distribution and neutral point voltage balancing issues. This issue can be resolved
with Active Clamped NPC (ANPC). In this thesis, the design, simulation, prototyping
and testing of a 70kw 3-level ANPC traction is introduced. / Thesis / Master of Science (MSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/26656 |
| Date | January 2021 |
| Creators | Wang, Yicheng |
| Contributors | Narimani, Mehdi, Emadi, Ali, Electrical and Computer Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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