Quantitative Reliability Evaluation of Silicon Carbide-Based Inverters for Multiphase Electric Drives for Electric Vehicles

• Autorzy: Morya Ajay Kumar , Toliyat Hamid A.

Identyfikatory

DOI

10.2478/pead-2022-0003

• Języki publikacji: EN

Abstrakty

EN

Reliability of power converter in the electric drivetrain of a vehicle can be a criterion for the comparison of various converter topologies, cooling system designs and control strategies. Therefore, reliability prediction is important for the design and control of vehicles. This paper presents an approach for quantitative evaluation of the reliability of converters for multiphase motor drives for electric vehicles (EVs) after considering the driving cycle. This paper provides a good background of reliability quantification so that it is easy to extend the presented approach to other applications. The models of subsystems have been selected to have excellent computational efficiency with good accuracy which is necessary for simulating long driving cycles. A simple vehicle model is used to obtain the traction motor torque demand for various points of the driving cycle. A multiphase interior permanent magnet synchronous motor has been used for traction motor. The operating voltage and currents of the motor are found using maximum torque per ampere (MTPA) control of IPMSM. The analytical loss calculation has been used to find the losses of switching devices of the converter. A thermal model of silicon carbide (SiC) MOSFET has been used to calculate junction temperature from the losses. The model developed here gives the failure rate and mean time between failures (MTBF) of switching devices of the inverter, which can be used to determine the failure rate. The model has been used to find the transition probabilities of a Markov model which can be used to quantify the reliability of converters of multiphase electric drives.

Słowa kluczowe

EN

electric vehicle; fault tolerance; Markov model; multiphase electric drive; reliability

• Wydawca: De Gruyter
• Czasopismo: Power Electronics and Drives
• Rocznik: 2022
• Tom: Vol. 7 (42)
• Strony: 29--42
• Opis fizyczny: Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Morya Ajay Kumar

• Advanced Electric Machines and Power Electronics Lab, Texas A&M University, College Station, TX, USA

• https://orcid.org/0000-0001-5317-5363

autor

Toliyat Hamid A.

• Advanced Electric Machines and Power Electronics Lab, Texas A&M University, College Station, TX, USA

• https://orcid.org/0000-0002-0730-0677

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