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Evaluation of Topologies for Multi-Level Bridge Legs for an Onboard Charger
At HPE, electric vehicles (EV) with a battery voltage >800V are investigated. GaN power semiconductors are used in multi-level converter topologies for this. Your task in this project is to evaluate different multi-level bridge leg topologies in terms of losses and implementation effort.
At HPE, electric vehicles (EV) with a battery voltage >800V are investigated
in order to exploit benefits in terms of overall cost reduction, power
density, efficiency, material use and decreased charging time. There, GaN
power semiconductors are also useful for achieving a high power density
and efficiency due to their fast switching speeds and low switching losses.
However, due to their lower blocking voltage of around 600V, multi-level
converter topologies must be used.
Your task in this project is to evaluate different multi-level bridge leg
topologies in terms of losses and implementation effort. By performing
simulations with the circuit simulator PLECS, first conclusions about the
general behavior of the circuits can be made. There, the control requirements
can be determined and implemented as well. In a final step, you will
design prototype bridge legs, with a strong focus on the layout of switching
cells for minimal parasitics. In case of an MA, the bridge legs can also be
assembled, commissioned and loss measurements can be performed.
At HPE, electric vehicles (EV) with a battery voltage >800V are investigated in order to exploit benefits in terms of overall cost reduction, power density, efficiency, material use and decreased charging time. There, GaN power semiconductors are also useful for achieving a high power density and efficiency due to their fast switching speeds and low switching losses. However, due to their lower blocking voltage of around 600V, multi-level converter topologies must be used. Your task in this project is to evaluate different multi-level bridge leg topologies in terms of losses and implementation effort. By performing simulations with the circuit simulator PLECS, first conclusions about the general behavior of the circuits can be made. There, the control requirements can be determined and implemented as well. In a final step, you will design prototype bridge legs, with a strong focus on the layout of switching cells for minimal parasitics. In case of an MA, the bridge legs can also be assembled, commissioned and loss measurements can be performed.
EvalTopologyMLBridgeLegs.pdf
