Electrical design of high-speed induction motors of up to 15 MW and 20000 RPM

Ahrens, Markus; Bikle, U.; Gottkehaskamp, R.; Prenner, H.

doi:10.1049/cp:20020147

Cited by 10 publications

(6 citation statements)

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“…6'400 -7'500 rpm [1]. Above 7'500 rpm it is usually specific high-speed design with active magnetic bearings [2][3][4][5]. These considerations apply to larger machines in power range of several megawatt.…”

Section: Motor Technologymentioning

confidence: 99%

“…Variable frequency drive (VFD) for high-speed application nowadays does not significantly differ from a conventional VFD. Drive configuration suggested in [2] with so called twin inverter configuration and open winding stator design is principally still possible, but there are meanwhile more straight forward ways. The power hardware is either the same as conventional VFD or it experiences minor modifications.…”

Section: Vfd Technologymentioning

confidence: 99%

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High Speed Electrical Drives – Perspective of VFD Manufacturer

2020

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This paper deals with high-speed electrical drives utilizing power electronic converters (commonly abbreviated as ASD, VFD or VSD). Existing solutions vary mainly on the motor side while the power electronic converter is very similar for all cases. Various advantages as well as technical challenges are discussed and illustrated. At certain stages comparisons between conventional and high-speed drives are made. The paper summarizes the experience of a VFD manufacturer based on state of the art technology in medium voltage and multi-megawatt power range. The authors believe that main complexity around high-speed drives is the motor design while the VFD requires only small adaptations or can sometimes be used directly without any modifications of standard design. The technology readiness is evaluated to be on a medium to high level.

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Section: Motor Technologymentioning

confidence: 99%

Section: Vfd Technologymentioning

confidence: 99%

High Speed Electrical Drives – Perspective of VFD Manufacturer

2020

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“…The 3-D time-stepping model of the end effects is simplified by solving a 2-D model that modifies the rotor effective resistivity using a corresponding end effect factor. Another approach consists of simplifying the meshing of the machine: the cross-section of a motor for example can be discretised using the 2-D finite difference method instead of the finite element method (FEM) [35]. Numerical methods can also be coupled with analytical methods as a technique to reduce the computing time [8], [9], [13]; [9] and [13] for example combine reluctance networks with the FE model using 2-D and 3-D approaches respectively to determine the electromagnetic performances faster than implementing solely the FEM.…”

Section: Chaptermentioning

confidence: 99%

Electromagnetic modelling of high speed induction motors

Velázquez¹,

Smith²

2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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Improvement in the power density of induction machines can be achieved when they operate at high rotational speeds using frequency converters that provide a higher frequency supply to the motor. Applications such as compressors require intrinsically high-speed operation. In these cases the mechanical integrity is prioritized over the electromagnetic performance and solid rotors are normally used instead of laminated rotors so they can withstand the peripheral and radial stresses caused by the high speeds. Small skin depths are associated with solid rotor structures; this complicates the electromagnetic analysis when FE modelling is used because a fine mesh is typically required. Although analytical methods in general tend to be less accurate than FE models, they can provide faster and reasonably accurate results. This thesis evaluates the use of an analytical multi-layer model as a preliminary design tool for determining the electromagnetic performance of high-speed copper-coated solid rotors. A simple FE model is developed in order to validate the results obtained from the analytical model. The input to the analytical multi-layer and FE models is normally current; consequently they are modified to work with voltage as the input reference. The multi-layer model is compared under constant current operation and constant voltage operation. The limitations of the analytical multi-layer model are highlighted. Declaration 13 Declaration No portion of the work referred to in the thesis has been submitted in support of an application for another degree or qualification of this or any other university or other institute of learning.

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“…For the smaller power range several manufacturers (e.g. Alstom, Siemens, ABB) offer copper cage induction machines with massive rotor iron and medium voltage IGBT PWM inverter operation [11]. For example, Siemens AG, Berlin recently introduced in the power range 4 MW, 15000/min, 2.5 kNm … 16 MW, 6000 /min, 25.5 kNm a high speed gas compressor drive series (Fig.…”

Section: B High Power High-speed Motorsmentioning

confidence: 99%

“…For numerous industrial applications such as turbocompressors [6], [15], [27], [34], turbo-molecular vacuum pumps [33], high speed cutting and milling [5], [9], generatormotor units for flywheels [8], [16], [29], micro-gas turbines [10], [22] and electrically driven turbo-chargers, high-speed direct drives without any gear between electrical motor and load are of growing interest in a wide power range of several Watts [30] up to several Megawatts [11]. Avoiding the gear features several benefits: increased mechanical stiffness, lower noise, but also reduction of wear, of maintenance cost, of total losses, of overall volume and mass.…”

Section: Introductionmentioning

confidence: 99%

High-speed inverter-fed AC drives

Binder

Schneider

2007

2007 International Aegean Conference on Electrical Machines and Power Electronics

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High speed drives offer advantages such as small size, low noise, integrated and thus compact design for many industrial applications due to the fact, that as direct drives they avoid the mechanical gear. Inverter supply provides variable speed, which allows high efficient operation for compressors and pumps. A wide speed and power range from 0.1 kW up to 80 MW is covered with circumference speeds of 100 … 250 m/s. Recent progress is discussed and details of the design of high speed electric machinery are addressed, such as electromagnetic utilization, loss components, types of motors, bearing aspects and inverter-motor interaction.

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Electrical design of high-speed induction motors of up to 15 MW and 20000 RPM

Cited by 10 publications

References 0 publications

High Speed Electrical Drives – Perspective of VFD Manufacturer

High Speed Electrical Drives – Perspective of VFD Manufacturer

Electromagnetic modelling of high speed induction motors

High-speed inverter-fed AC drives

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