Relationship between rated torque and size of permanent magnet machines

“…Many design criteria for permanent magnet synchronous motor (PMSM) already exist to minimize the losses for a given torque [3]- [5]. The optimum inner stator radius to outer stator radius ratio, the optimum number of slots, and the optimum distribution of losses are then discussed.…”

Section: Nomenclaturementioning

confidence: 99%

Design Methodology of a Permanent Magnet Synchronous Machine for a Screwdriver Application

Bernard¹,

Martin²,

Zaïm

2012

IEEE Trans. Energy Convers.

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In this paper, a novel methodology is presented in order to design a permanent magnet synchronous machine associated with a gearbox for a screwdriver application. The study shows how, from specification such as maximum volume, maximum heating, torque, and speed profiles, it is possible to formulate the sizing problem. The modeling is based on a purely analytical formulation. We will show that it is possible to establish rules in order to make optimal choices of materials (magnets and stator core). The optimization of the pole pair number and the choice of the gear ratio will also be discussed. Finally, the finite element method will be used to validate the designed machine.Index Terms-Analytical models, design methodology, energy efficiency, frequency conversion, high-speed permanent magnet synchronous motor, machine tool, magnetic losses, soft magnetic materials.

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“…As the main purpose of this paper is to evaluate the maximum torque production capability of the hybrid machine, here, we only present cases in which the direction of the field current strengthens the air-gap flux. However, as discussed in [22,24], the field weakening can also occur by changing the direction of DC current. Fig.…”

Section: Machines Design and Fea Analysismentioning

confidence: 99%

Comparison of PM and Hybrid Excited Machines for Marine Vessel Hybrid-Electric Propulsion

Hendijanizadeh

Sharkh

Qazalbash³

2018

2018 XIII International Conference on Electrical Machines (ICEM)

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This paper evaluates the maximum torque capability of a hybrid excited synchronous machine in comparison with a conventional PM synchronous motor. The main focus of the paper is on the study of the effect of DC excitation magnetic flux on the saturation of the stator teeth, which limits the torque production capability of the hybrid machine. Magnetostatic and transient analyses are carried out for both motors. As expected the hybrid motor air gap flux controllability comes at the expense of reducing its torque density. The torque density reduction penalty is quantified and some hidden limitations and challenges of designing such a hybrid motor are revealed based on an in-depth analysis of the flux distribution within the machine.

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Relationship between rated torque and size of permanent magnet machines

Cited by 26 publications

References 1 publication

Optimising the refrigeration cycle with a two-stage centrifugal compressor and a flash intercooler

Optimising the refrigeration cycle with a two-stage centrifugal compressor and a flash intercooler

Design Methodology of a Permanent Magnet Synchronous Machine for a Screwdriver Application

Comparison of PM and Hybrid Excited Machines for Marine Vessel Hybrid-Electric Propulsion

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