Comparative analysis of rare earth-less electrical machines for 48V automotive cooling fan applications

Pop, Florin P.; Popa, Dan-Cristian; Martis, Radu; Marțiș, Claudia; Pop, Adrian-Cornel

doi:10.1109/emes.2017.7980409

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…SynRMs are mainly seen as potential alternative for IM-drives, however in their conventional construction they still exhibit a power factor which is 5% to 10% lower than an IM [11]. The power factor is in direct relation with the saliency ratio as also reported in [10], where it is shown that for a machine to have a cos ϕ > 0.8, a ξ > 7 is needed. Unlike IM-drives, SynRMs have negligible rotor losses (at sufficiently low rotor field variations), and thus they can outperform the former in terms of efficiency.…”

Section: Synchronous Reluctance Machine Torque Production Mechanism mentioning

confidence: 76%

“…A key point in this is the proper concept and arrangement of the rotor flux barriers [9]. According to the work of Moghaddam [10] a very high number of barriers (e.g., higher than nine) does not have a major impact on the d-axis inductance, and thus on the average torque. However, the torque ripple is much more sensitive to this number.…”

Section: Synchronous Reluctance Machine Torque Production Mechanism mentioning

confidence: 99%

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Synchronous Reluctance Machines for Automotive Cooling Fan Systems: Numerical and Experimental Study of Different Slot-Pole Combinations and Winding Types

2021

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In this paper a side-by-side comparison between synchronous reluctance machines (SynRMs) with concentrated and distributed windings is performed. The characteristics, parameters, and the installation space of a permanent magnet synchronous machine (PMSM) with concentrated windings used in a 13 V automotive cooling fan system (CFMs) are used as requirements and specifications. For that, eight SynRMs with different stator and rotor topologies are investigated and optimized by means of FE-based electromagnetic optimization. Knowing the challenges associated with the development of mechanically stable SynRM rotor structures, for two selected cross-sections in view of being prototyped, designs checks are performed to ensure robust operation at up to two times the required operating speed. The simulated results were verified by means of measurements performed using two different types of loading systems, i.e., with the real ventilator and using a DC machine as a load. Based on this, the relative differences between all three motor technologies in terms of important quantities (e.g., torque-speed characteristic, torque ripple, efficiency, power factor and ultimately the size) are highlighted.

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Section: Synchronous Reluctance Machine Torque Production Mechanism mentioning

confidence: 76%

Section: Synchronous Reluctance Machine Torque Production Mechanism mentioning

confidence: 99%

Synchronous Reluctance Machines for Automotive Cooling Fan Systems: Numerical and Experimental Study of Different Slot-Pole Combinations and Winding Types

2021

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“…These days, in the era of vehicle electrification, cooling fans are powered with electric motors. Despite the advance systems, the low-cost DC motors are still commonly used in low-cost vehicles [1]. However, DC motors have commutator and brush.…”

Section: Introductionmentioning

confidence: 99%

Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

et al. 2021

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Switched reluctance motors (SRMs) are simple in structure, easy to manufacture, magnet-less, brushless, and highly robust compared to other AC motors which makes them a good option for applications that operate in harsh environment. However, the motor has non-linear magnetic characteristics, and it comes with various pole-phase combinations and circuit topologies that causes many difficulties in deciding on which type to choose. In this paper, the viability of SRM as a low-cost, rugged machine for vehicle radiator cooling fan is considered. First, necessary design considerations are presented, then three commonly use types of SRM are analyzed: A 3-phase 6/4, 3-phase 12/8, and a 4-phase 8/6 to find their static and dynamic characteristics so the most suitable type can be selected. Simulation results show that the 8/6 SRM produces the highest efficiency with less phase current which reduces the converter burden. However, with asymmetric half bridge converter, eight power switches are required for 8/6 SRM and thus put a burden on the overall drive cost. As a solution, the Miller converter with only six switches for four phase SRM. To verify the proposed idea, the 8/6 SRM was manufactured and tested. The results show that Miller converter can be used for the proposed SRM with slightly reduced efficiency at 80.4%.

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Electrical Machines for Mobile Charging Station Propulsion Systems – Comparative Study

Radu

Popa

Piglesan

et al. 2019

2019 11th International Symposium on Advanced Topics in Electrical Engineering (ATEE)

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Comparative analysis of rare earth-less electrical machines for 48V automotive cooling fan applications

Cited by 8 publications

References 7 publications

Synchronous Reluctance Machines for Automotive Cooling Fan Systems: Numerical and Experimental Study of Different Slot-Pole Combinations and Winding Types

Synchronous Reluctance Machines for Automotive Cooling Fan Systems: Numerical and Experimental Study of Different Slot-Pole Combinations and Winding Types

Design Considerations and Selection of Cost-Effective Switched Reluctance Drive for Radiator Cooling Fans

Electrical Machines for Mobile Charging Station Propulsion Systems – Comparative Study

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