Special Issue "Design of Electric Drive System of Electric Vehicles"

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Vehicle Engineering".

Deadline for manuscript submissions: closed (15 September 2023) | Viewed by 2130

Special Issue Editor

Department of Engineering (DIEF), University of Modena and Reggio Emilia, 41121 Modena, Italy
Interests: synchronous machines; permanent magnet machines; fault tolerance; multiphase machine; finite element analysis; permanent magnet motors; reluctance motors; stator and rotor fault diagnosis; distributed power generation; energy storage and flywheels; machine control; optimization; PWM power convertors; asynchronous machines; condition monitoring; demagnetization; eddy currents; hybrid electric vehicles
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Special Issue Information

Dear Colleagues,

The growing interest in electric mobility and the new objectives set for the reduction in atmospheric pollutant emissions have pushed research in the field of electric machines for traction applications toward new horizons.

The need to reduce overall dimensions and simultaneously to increase the performance and efficiency of powertrains has paved the way for the use of new technologies that make it possible to fix critical issues related to machine design and performance validation.

The most interesting challenges to be considered include the following: the use of WBG devices to increase the PWM switching frequency and, thus, reduce the current ripple; research of materials and techniques for the lightening of powertrains; the replacement of rare earth permanent magnets with different materials; the study of control strategies to extend the speed range of the powertrain.

The strong block integration and the demands of increasingly challenging requirements have stimulated the development of electric drive systems for electric vehicles in multidisciplinary engineering. Therefore, over recent years, researchers and designers have witnessed the development of multidisciplinary design techniques that combine mechanical and thermal aspects in the electromagnetic design of the machines.

From the point of view of power electronics, the demand for high-powered, smaller dimensions, required the increase in the switching frequency, has led to critical issues with respect the stress on the insulation system. Research pursuing the best designs to balance current and voltage distortion with the dimension and performance requirements has included the exploration of different inverter topologies, such as multilevel inverters and current source inverters.

Electric vehicles represent a fundamental research sector of electrical and mechanical engineering, representing a sector in which the multidisciplinary nature of engineering finds its maximum expression.

Prof. Dr. Claudio Bianchini
Guest Editor

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  • wide bandgap
  • wide speed range
  • flux weakening
  • interior permanent magnet machines

Published Papers (1 paper)

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Effects of the Magnetic Model of Interior Permanent Magnet Machine on MTPA, Flux Weakening and MTPV Evaluation
Machines 2023, 11(1), 77; https://doi.org/10.3390/machines11010077 - 08 Jan 2023
Cited by 3 | Viewed by 1725
Interior permanent-magnet synchronous machines are widely spreading in automotive and vehicle traction applications, because of their high efficiency over a wide speed range. This capability can be achieved by appropriated control strategies: Maximum Torque per Ampere (MTPA), Flux Weakening (FW) and Maximum Torque [...] Read more.
Interior permanent-magnet synchronous machines are widely spreading in automotive and vehicle traction applications, because of their high efficiency over a wide speed range. This capability can be achieved by appropriated control strategies: Maximum Torque per Ampere (MTPA), Flux Weakening (FW) and Maximum Torque per Volt (MTPV). However, these control trajectories are often based on an simplified magnetic model of the electrical machine. In order to improve the evaluation of machine output capabilities, nonlinear magnetic behavior must be modeled. This is not only related to the final application with a given drive and control structure, but also during the design process of the electric machine. In the design process, the output torque Vs. speed characteristic must be calculated following MTPA, MTPV and FW in the most accurate way to avoid significant error. This paper proposes a set of algorithms to compute MTPA, FW and MTPV curves for interior permanent-magnet synchronous machines taking into account the machines’ nonlinearities caused by iron saturation and compares differed approaches to highlight the torque–speed capabilities for the same machine following different methods. The algorithms are based on the maps of the equivalent inductances of a reference interior permanent-magnet synchronous machine and inductances maps were obtained via 2-D Finite Element Analysis over the machine’s operating points in idiq reference plane. The effects of different 2-D finite element methods are also computed by both standard nonlinear magnetostatic simulations and Frozen Permeability simulations. Results show that the nonlinear model computed via frozen permeability is more accurate than the conventional linear and nonlinear models computed via standard magnetostatic simulations; for this reason, during the electrical machine design, it is important to check the expected performance employing a complete inductance map and frozen permeability. Full article
(This article belongs to the Special Issue Design of Electric Drive System of Electric Vehicles)
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