Power losses calculation methodology to evaluate inverter efficiency in electrical vehicles

Pou, Josep; Osorno, D.; Zaragoza, Jordi; Jaen, C.; Ceballos, Salvador

doi:10.1109/cpe.2011.5942269

Cited by 41 publications

(29 citation statements)

References 6 publications

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“…However, some complex models require many IGBT parameters to perform the calculations. The proposed power losses estimator using Matlab/Simulink presented in [9] is more flexible and shows similar results when compared with other simulation programs such as PSIM and Semisel (Semikron).…”

Section: Two-level Convertermentioning

confidence: 77%

“…Therefore, the power loss during conduction is computed by multiplying the voltage and the current in on-state. The calculation for conduction losses of IGBT is derived in [9] and can be simplified as:…”

Section: A Conduction Lossesmentioning

confidence: 99%

“…In order to remain conservative, the parameters of junction temperature at 150°C are used. The switching losses approximation is also described in [9] and can be simplified by the equation: (2)…”

Section: B Switching Lossesmentioning

confidence: 99%

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Reactive power capability of DFIG based wind turbine around synchronous operating point with two-level and three-level NPC converter

Sujod

Erlich

2013

2013 IEEE Grenoble Conference

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The increasing in wind turbines (WTs) generation system required grid utilities to extend its ability not only to provide active power but also having reactive power capability to fulfill transmission system requirements. The reactive power capability is subject to several limitations which change with the operating point. In doubly fed induction generator (DFIG) based WT, a special attention around synchronous operating point is needed since the limitation of maximum junction temperature of switching devices cause a reduction on maximum permissible output current at the rotor side. This paper investigates the reactive power capability of the DFIG with three-level neutral point clamped (NPC) voltage source converter (VSC) and provides a comparison with two-level VSC. The thermal behavior of the converters using semiconductor losses and thermal model are illustrated. Simulation results show that three-level NPC converter increased the maximum permissible rotor current as well as the reactive power capability of the DFIG. Index Terms--Doubly fed induction generator (DFIG), junction temperature, reactive power capability, three-level neutral point clamped (NPC) converter, voltage source converter (VSC) I.

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Section: Two-level Convertermentioning

confidence: 77%

Section: A Conduction Lossesmentioning

confidence: 99%

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Reactive power capability of DFIG based wind turbine around synchronous operating point with two-level and three-level NPC converter

Sujod

Erlich

2013

2013 IEEE Grenoble Conference

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“…The measurements presented in section II are used to build LUTs. Unlike previous EV traction inverter simulations that use mathematical models based on datasheet parameters [11,13,24], the EV simulation in this paper uses measured switching energies and calculates power losses at each simulation step. The transistor and diode losses depend on current and temperature, hence, measurements have been performed on all the device technologies at different currents (10A and 20A) and different temperatures (25°C, 75°C and 150°C).…”

Section: Cmentioning

confidence: 99%

The Potential of SiC Cascode JFETs in Electric Vehicle Traction Inverters

Gonzalez

Davletzhanova

et al. 2019

IEEE Trans. Transp. Electrific.

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The benefits of implementing SiC devices in EV powertrains has been widely reported in various studies. New generations of SiC devices including planar MOSFETs, trench MOSFETs and more recently, cascode JFETs have been released by various manufacturers. SiC cascode devices comprise of low voltage silicon MOSFETs for gate driving and high voltage depletion mode SiC JFETs for voltage blocking. These devices are particularly interesting because it avoids the known reliability issues of SiC gate oxide traps resulting in threshold voltage drift. In this paper, an EV powertrain is simulated using experimental measurements of conduction and switching energies of various SiC devices including 650V trench, 900V planar and 650V cascode JFETs. Unlike previous papers where losses are calculated using models based on datasheet parameters, here static and dynamic measurements on the power devices at different currents and temperatures are used to calculate losses over simulated driving cycles. Field-stop IGBTs are also evaluated. The 3-phase 2-level inverter model is electrothermal by accounting for the measured temperature dependence of the losses and uses accurate thermal networks derived from datasheets. Converter efficiency and thermal performance are compared for each device technology. Results show that SiC cascode JFETs have great potential in EV powertrain applications. I.

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“…For this purpose, the loss models of the different components of the system (inverter, motor and pump) are necessary. The literature describes several analytical and numerical models for loss calculations [5,[16][17][18][19][20][21]. The advantages of the analytical approach are the short calculation time, the visibility of the parameters dependencies and the ease of integration with other models when calculating the characteristics of a more complex system.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Analysis of Low Electric Power Drives Employing Induction and Synchronous Reluctance Motors in Pump Applications

et al. 2019

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Due to the rapid increase in the number of variable speed AC drives, the analysis of their energy efficiency has become highly essential. However, such an analysis requires consideration of a wide variety of factors. This includes considering the energy loss in the frequency converter, depending on the motor type. In this article, a computational comparison of the energy properties of variable frequency pump drive employing two types of electric machines, i.e. an induction and a synchronous reluctance motor, is presented. The effect of the motor type on the losses in a low-voltage two-stage frequency converter using analytical and numerical models, with a further comparison, is investigated. Furthermore, an alternative approach to determine the current magnitude and power factor of the load of the converter is suggested. Eventually, this study provides a quantitative estimate of the increase in losses in the converter caused by using the two different motor types. Several experimental tests are conducted on induction and synchronous 1.1 kW reluctance motors.

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Power losses calculation methodology to evaluate inverter efficiency in electrical vehicles

Cited by 41 publications

References 6 publications

Reactive power capability of DFIG based wind turbine around synchronous operating point with two-level and three-level NPC converter

Reactive power capability of DFIG based wind turbine around synchronous operating point with two-level and three-level NPC converter

The Potential of SiC Cascode JFETs in Electric Vehicle Traction Inverters

Efficiency Analysis of Low Electric Power Drives Employing Induction and Synchronous Reluctance Motors in Pump Applications

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