Improved Analytical Estimation of Rotor Losses in High-Speed Surface-Mounted PM Synchronous Machines

Chiodetto, Nicola; Alberti, Luigi

doi:10.1109/tia.2017.2693178

Cited by 27 publications

(10 citation statements)

References 23 publications

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“…The relevant thermal capacitances are included, adopting similar subscripted acronyms to those of the resistances. The rotor is not considered in the thermal network; it can be properly designed to limit the contribution of rotor losses [33,34]. The loss sources, as an input of the thermal network, are computed from the simulations as a function of the instantaneous speed and torque of the EM, as reported in Figure 12.…”

Section: Thermal Analysis Of the Electric Motormentioning

confidence: 99%

Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

Troncon

Alberti

2020

Energies

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The focus of this paper is the potential electrification of specialized agricultural tractors involved in vineyards and orchards. This category of machinery has not received research attention to date; however, regulations are encouraging lower emissions and higher efficiency, requiring the adoption of new technologies. Traction makes up only a limited part of this application, and the working cycle is not trivial; therefore, the design of the system is not straightforward. This study takes advantage of experimental measurements carried out under real operating conditions on a traditional specialized tractor, which was chosen as performance target. The performance requirements of the hybrid powertrain components are investigated, with particular focus placed on the electric motor. According to the dimension constraints, the design of the electric motor is carried out considering the requirements in terms of its thermal-equivalent torque and overload capability. The results are validated through a detailed thermal simulation under real duty cycles.

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Section: Thermal Analysis Of the Electric Motormentioning

confidence: 99%

Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

Troncon

Alberti

2020

Energies

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“…Rotor pole numbers above eight are not considered, as it leads to high electrical frequencies and higher power converter losses. Due to the high-speed operational requirements, the MMF harmonics induces eddy currents within the magnets [16], [17] leading to high rotor temperatures. In order to mitigate this effect, the winding topology for each slot/pole combination and winding parameters are selected such that the winding harmonics are minimized for an acceptable trade-off the fundamental winding factor.…”

Section: B Winding Arrangementmentioning

confidence: 99%

Design of a Stator for a High-Speed Turbo-Generator With Fixed Permanent Magnet Rotor Radius and Volt–Ampere Constraints

Fernando

Arumugam

Gerada

2018

IEEE Trans. Energy Convers.

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Abstract-This paper investigates high-speed surface PM machine design for portable turbo-generator applications. The rotor radius is fixed to achieve certain optimal characteristics of the magnet retention mechanism. The basis of this paper is to design and select the stator. The stator designs are populated by different slot/pole combinations, winding arrangements and over a range of possible stack lengths. However, the design is constrained by physical diameter, stack length and electrical volt-ampere constraints. A large number of preliminary machine designs do not satisfy the specified turbo-generator torque/speed requirements under the given volt-ampere constraints and therefore it is ineffective to perform Finite Element analysis on all preliminary design variations. In order to establish the feasibility of a machine design to fulfill the specified turbo-generator torque/speed requirements, the concept of inductance-limits is presented and then linked with stator design parameters. By application of this analysis strategy, a confined optimal set of stator designs are obtained and are subjected to detailed finite element simulations. A final machine design is selected and fabricated. Experimental results are presented for the validation of the final machine design.

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“…However, induced space harmonic magnetomotive force (MMF) can lead to significant eddy currents and incur loss. Therefore, the main cause of PM temperature rise is the eddy-current loss, which can be calculated by [12].…”

Section: The Heating Sources Of Pm and Stator Windingsmentioning

confidence: 99%

A Review of Thermal Monitoring Techniques for Radial Permanent Magnet Machines

Meng

Zhang

2021

Machines

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Permanent magnet machines are widely applied in motor drive systems. Therefore, condition monitoring of permanent magnet machines has great significance to assist maintenance. High temperatures are accountable for lots of typical malfunctions and faults, such as demagnetization of the permanent magnet (PM) and inter-turn short circuit of stator windings. Therefore, temperature monitoring of the PM and stator windings is essential for reliable operation. In this paper, an overview introducing and evaluating existing thermal monitoring methods is presented. First, the mechanism of thermal-caused failures for the PM and stator windings is introduced. Then, the design procedure and principles of existing temperature monitoring methods are introduced and summarized. Next, the evaluations and recommendations of application feasibility are demonstrated. Finally, the potential future challenges and opportunities for temperature monitoring of the PM and stator windings are discussed.

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Improved Analytical Estimation of Rotor Losses in High-Speed Surface-Mounted PM Synchronous Machines

Cited by 27 publications

References 23 publications

Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

Design of a Stator for a High-Speed Turbo-Generator With Fixed Permanent Magnet Rotor Radius and Volt–Ampere Constraints

A Review of Thermal Monitoring Techniques for Radial Permanent Magnet Machines

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