Rotor Materials for Medium-Speed Solid-Rotor Induction MotorS

Aho, Tuomo; Sihvo, V.; Nerg, Janne; Pyrhönen, Juha

doi:10.1109/iemdc.2007.382722

Cited by 26 publications

(15 citation statements)

References 1 publication

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“…The eddy current density in the conducting zone can be stated as follows: (9) where,σ represents the electric conductivity and E was already defined in Equation (8). The governing equation can be written in accordance to Ampere's law and magnetic vector potential as follows: (10) where, µ is the magnetic permeability.…”

Section: Finite Element Analysismentioning

confidence: 99%

“…It is noted, some other investigations have focused on slotted solid rotor motor for the improvement of motor performance. As a result, Aho et al [10] mentioned the higher are the saturation of magnetic flux density and electrical conductivity of the motor materials, the higher is the torque of motor. Therefore, the saturation of flux density and the electrical conductivity of the materials have direct relation with the torque of motor.…”

Section: Introductionmentioning

confidence: 99%

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Performance Improvement of a Slotted Solid Rotor Induction Motor with High Temperature Superconder Coating

Azari

2019

IJE

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A B S T R A C TThis paper analyzes an induction motor with high temperature superconducter (HTS) coated slotted solid rotor. By slotting the solid rotor, the electromagnetic torque near synchronous speed will increase but the starting torque will decrease. To improve starting torque, rotor slots are coated with HTS materials. Using HTS material vary the rotor resistance to great extends in starting step and this means the starting torque will be maximized. Also the torque near synchronous speed will be higher than before because of the resistance of the HTS is completely zero in this period. This would help the torque become more than the case without any coating. It is concluded that, HTS coating of slotted solid rotor will increase the starting torque by 42 and 74% than smooth type rotor and slotted one, respectively. For case-study motor, the torque near synchronous speed these improvements were 75% and 33%, respectively. The performance of the proposed motor is simulated using finite element method (FEM).

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Section: Finite Element Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Slotted Solid Rotor Induction Motor with High Temperature Superconder Coating

Azari

2019

IJE

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“…Massive rotor induction machines and homo-polar machines doe not have any rotor winding. They feature massive rotor iron [35], yielding a high mechanical strength. In evacuated flywheel containments the increased air friction loss due to the reluctance rotor of the homo-polar machine [8] is avoided.…”

Section: Types Of High Speed Motorsmentioning

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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“…In [5], [10], it is shown that a slitted rotor produces a higher torque, when the rotor core material has a high saturation flux density and a low resistivity. Accordingly, in the given motor as rotor material VACOFER S1, which is nearly pure iron [11], has been used, which has a high conductivity and saturation limit, but only a low tensile strength (Table IV).…”

Section: B 4-pole Srim Construction and Testingmentioning

confidence: 99%

Axially slitted, high-speed solid-rotor induction motor technology with copper end-rings

Gessese

Binder

2009

2009 International Conference on Electrical Machines and Systems

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In high-speed applications the mechanical strength of a solid rotor induction motor is recognized as a significant benefit. The performances of a 4-pole and a 2pole solid-rotor induction machines for 29100 min -1 are analyzed numerically and compared with the measured performance of a permanent magnet synchronous motor of the same active volume. The 3-phase, 4-pole, axially slitted prototype solid rotor induction motor with copper end rings is constructed and tested. The simulation results show that a 2-pole solid rotor induction motor has a larger torque density and is a better candidate for high speed drives.

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Rotor Materials for Medium-Speed Solid-Rotor Induction MotorS

Cited by 26 publications

References 1 publication

Performance Improvement of a Slotted Solid Rotor Induction Motor with High Temperature Superconder Coating

Performance Improvement of a Slotted Solid Rotor Induction Motor with High Temperature Superconder Coating

High-speed inverter-fed AC drives

Axially slitted, high-speed solid-rotor induction motor technology with copper end-rings

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