Main Dimensions of a Rotating Machine

Pyrhönen, Juha; Jokinen, T.; Hrabovcová, Valéria

doi:10.1002/9780470740095.ch6

Cited by 4 publications

(11 citation statements)

References 1 publication

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“…It depends on the shaft speed, pole-pair numbers, and properties of magnet. The mathematical expression for estimation of the weight of permanent magnets used in the generator is expressed as [23], [24] (11)…”

Section: Weight Of Permanent Magnetsmentioning

confidence: 99%

“…The volume of rotor iron depends mainly on the rotational speed, tangential stress, and density of iron. The volume, V rot , and mass of the rotor iron used, M rot , are given by [23], [24] (12) (13) where ρ iron and σ F tan are density in kg/m 3 and tangential stress in pascal of rotor, respectively.…”

Section: Weight Of Rotor Ironmentioning

confidence: 99%

“…Stator iron is the heaviest component in the generator. The volume, V sta , and the weight, M sta , of the stator iron pivot mainly on the rated power of the machine are stated in [23] and [24]. In addition, maximum flux, output coefficient, winding coefficient, current density, and turns of copper windings also affect the volume of stator iron used in the machine.…”

Section: Weight Of Stator Ironmentioning

confidence: 99%

“…In addition, maximum flux, output coefficient, winding coefficient, current density, and turns of copper windings also affect the volume of stator iron used in the machine. The expression for stator iron volume and weight can be expressed as [23], [24] (14) (15) where t s is the estimated thickness of stator iron in meter, L in is the axial length, and D in is the inner diameter of the machine in meter. The ratio of inner diameter to the length of the machine is assumed to be 4:5 [23], [24].…”

Section: Weight Of Stator Ironmentioning

confidence: 99%

“…The expression for stator iron volume and weight can be expressed as [23], [24] (14) (15) where t s is the estimated thickness of stator iron in meter, L in is the axial length, and D in is the inner diameter of the machine in meter. The ratio of inner diameter to the length of the machine is assumed to be 4:5 [23], [24].…”

Section: Weight Of Stator Ironmentioning

confidence: 99%

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Novel Technique for Power Generation in HAWP Systems

A¹

2015

IJERT

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This paper presents a power generation technique using high altitude wind power generating system buoyed by a aerostat filled with light gas by which electrical energy is extracted with the help of high-altitude streamlined wind. The best generation and transmission mechanisms that provide the right power-to-weight (P/W) ratio and efficiency of the overall system are examined. The differences in weight and total losses with deviations in generation voltage and pole-pair number (frequency) of the permanent magnet synchronous generator have been examined. Also, the design of the tether that transports electrical power to the ground-based station is presented. To find the optimal weight of the tether, AC and DC transmission mechanisms using conductors that use aluminum/copper are studied and compared. It is found that aluminum conductor offers better P/W ratio than using the copper conductor. By means of the detailed analysis of generation and transmission mechanisms, it is determined that the optimal electrical power architecture is medium voltage (MV) AC generation and also transmission. It reveals better P/W ratio and efficiency in contrast with low-voltage AC generation and MV DC transmission. The designated electrical design simplifies the electric system by transporting the power electronic converter from the aerial unit to the ground base station and thus the overall P/W ratio is increased by a factor of 7% approximately.

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Section: Weight Of Permanent Magnetsmentioning

confidence: 99%

Section: Weight Of Rotor Ironmentioning

confidence: 99%

Section: Weight Of Stator Ironmentioning

confidence: 99%

Section: Weight Of Stator Ironmentioning

confidence: 99%

Section: Weight Of Stator Ironmentioning

confidence: 99%

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Novel Technique for Power Generation in HAWP Systems

A¹

2015

IJERT

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Review of High Power and High Voltage Electric Motors for Single-Aisle Regional Aircraft

et al. 2022

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This paper presents a review of the state of the art in electric propulsion for regional aircraft in the MW range. The implications surrounding the implementation of this technology, such as the need of high-power density or the use of high-voltage at high-altitude, are presented. Along with the challenges, the available technologies to face them are reviewed. Those are, as follows, the emerging new motor topologies for this purpose, the winding technologies, the materials employed for electric motors for aircraft propulsion and the ground-breaking use of high-temperature superconductors (HTS) as a high-power density enabler. Finally, a conclusion is presented gathering the main ideas of the paper.INDEX TERMS Aircraft propulsion, electric motor, high-power, high-temperature superconductor, high-voltage.

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