Thermal Analysis and Experimental Validation of a 30 kW 60000 r/min High-Speed Permanent Magnet Motor With Magnetic Bearings

Dong, Baotian; Wang, Kun; Han, Bangcheng; Zheng, Shiqiang

doi:10.1109/access.2019.2927464

Cited by 55 publications

(32 citation statements)

References 33 publications

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“…5. In the 250 MW hydrogenerator rotor region, fluid flow and heat transfer satisfy the laws of mass conservation, momentum conservation, and energy conservation [12]- [17]. The mathematical equations of 3-D fluid and thermal coupling field in the rotor region of hydrogenerator are given as follows.…”

Section: Fluid-thermal Coupling Analysis Model Of Hydrogeneratormentioning

confidence: 99%

Thermal Modeling and Experimental Validation in the Rotor Region of Hydrogenerator With Different Rotor Structures

et al. 2021

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Thermal management is often considered a bottleneck in the pursuit of the next generation hydrogenerator in the electric power system. Overheating of the complex rotor parts has become one of the main problems affecting safe and stable hydrogenerator operation. In this paper, a 250 MW hydrogenerator is analyzed. The transient electromagnetic field of the hydrogenerator is calculated and the losses of the rotor parts are obtained. The rotation of the hydrogenerator rotor is considered. Three-dimensional fluid and thermal mathematic and physical models of the hydrogenerator are established. The loss values from electromagnetic field calculations are applied to the rotor parts as heat sources in the temperature field. After solving the fluid and thermal equations of fluid-solid conjugated heat transfer, influence of the structures of rotor support plate, rotor pole body insulation, and rotor excitation winding on the fluid flow and temperature distribution in the rotor region of hydrogenerator is studied using the finite volume method. The calculated temperature result of rotor excitation winding is compared with the measured value. The calculated temperature result agrees well with the measured value. It provides an important reference for optimizing the rotor structure of the larger hydrogenerator.

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Section: Fluid-thermal Coupling Analysis Model Of Hydrogeneratormentioning

confidence: 99%

Thermal Modeling and Experimental Validation in the Rotor Region of Hydrogenerator With Different Rotor Structures

et al. 2021

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“…Based on the electromagnetic field-temperature field bidirectional coupling method [26], under the condition that the maximum operating temperature of the motor is not exceeded, it is determined that, when the motor fails to run for 40 min, the maximum phase current allowed in the winding of the module motor is 1.5 times of the rated current. When the motor fails to run for 20 min, the maximum phase current allowed in the motor winding of the module is 2.8 times of the rated current.…”

Section: B Mcs-pmftsm Fault Tolerance Principlementioning

confidence: 99%

Research on Operation of Low-Speed and High-Torque Module Combined Stator Permanent Magnetic Fault-Tolerant Motor With Unequal Span Winding

Gan

Zhang

et al. 2020

IEEE Access

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Permanent magnetic fault-tolerant motors have been developed rapidly due to their high reliability and have been widely used in many special fields. Compared with the conventional module faulttolerant motor, the module combined stator permanent magnetic fault-tolerant motor (MCS-PMFTSM) with unequal span winding has two sizes of span coils in each operation module, which realizes the electrical decoupling and mechanical decoupling between the module motors and solves the problem that the span of the double-layer winding of the conventional modular fault-tolerant motor can only be 1. Winding parameters of the unequal span are calculated, on the basis of which the operation performance of MCS-PMFTSM can be analyzed. The performance of MCS-PMFTSM in the normal operation and three failure operations (open circuit failure, Short circuit fault, concurrent failure) are analyzed by finite element method, which proves that it has good fault tolerance. The 12kW100r/min MCS-PMFTSM prototype is tested to verify the correctness of the analysis method and the rationality of the proposed MCS-PMFTSM.

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“…igh-speed permanent magnet synchronous machines (HSPMSMs) receive more attention lately in applications such as air compression, micro-machining, and flywheel energy storage system [1], [2]. This kind of machine features high power density, excellent dynamic performance, and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

Zhu

Huang

Dong

et al. 2020

IEEE Trans. Energy Convers.

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This paper presents a new rotor design to reduce rotor eddy current loss of a high-speed permanent magnet synchronous machine for flywheel energy storage system. Instead of using common nonmagnetic sleeves, the new rotor incorporates permeable retaining sleeves (PRSs) to fix permanent magnets on the rotor hub. The PRSs are made of permalloy that features high permeability and high electrical conductivity. Thus, skin depths for asynchronous harmonics are extremely small. On the other hand, the PRSs are electrically insulated along the circumferential direction. Owing to these two reasons, rotor eddy current loss at open circuit decreases by 64.2% without sacrificing torque output, compared with an original rotor with nonmagnetic retaining sleeve. In addition, thermal and structural finite element analyses are performed to calculate rotor temperature distribution and evaluate the structural integrity of the new rotor. Rotor eddy current loss reduction benefits lowering rotor temperature rise. Prototype machine with the new rotor is fabricated, and preliminary tests are carried out to confirm the analysis results.

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Thermal Analysis and Experimental Validation of a 30 kW 60000 r/min High-Speed Permanent Magnet Motor With Magnetic Bearings

Cited by 55 publications

References 33 publications

Thermal Modeling and Experimental Validation in the Rotor Region of Hydrogenerator With Different Rotor Structures

Thermal Modeling and Experimental Validation in the Rotor Region of Hydrogenerator With Different Rotor Structures

Research on Operation of Low-Speed and High-Torque Module Combined Stator Permanent Magnetic Fault-Tolerant Motor With Unequal Span Winding

Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

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