A Comprehensive Analysis of the Loss Mechanism and Thermal Behavior of a High-Speed Magnetic Field-Modulated Motor for a Flywheel Energy Storage System
Abstract
1. Introduction
2. Theoretical Model of Loss Calculation and Thermal Analysis
2.1. Motor Structure and Key Parameters
2.2. Electromagnetic Principles of Magnetic Field-Modulated Motors
2.3. Comprehensive Loss Classification and Calculation Methods
2.4. Advanced Thermal Modeling Methods
2.5. Innovative Analytical Models for Loss Estimation and Thermal Prediction
3. Finite Element Analysis of Loss Distribution
3.1. Simulation Setup and Parameter Configuration
3.2. Comparative Analysis of Loss Distribution in Different Components
3.3. Impact of Operating Speed on Loss Characteristics
3.4. Sensitivity Analysis of Loss to Design Parameters
4. Loss Reduction Optimization Design
4.1. Proposed Innovative Design Improvements
4.2. Comparative Analysis of Losses Before and After Optimization
4.3. Thermal Performance Improvement Assessment
4.4. Efficiency Enhancement Under Various Operating Conditions
5. Experimental Verification
5.1. Prototype Design and Testing Platform
5.2. Measurement Methodology for Different Loss Components
5.3. Experimental Results and Validation of Theoretical and Simulation Models
5.4. Performance Comparison Under Different Operating Conditions
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value |
---|---|
Rated power | 5 kW |
Rated speed | 30,000 rpm |
Stator outer diameter | 120 mm |
Rotor outer diameter | 60 mm |
Active length | 85 mm |
Air gap length | 0.8 mm |
Number of stator slots | 12 |
Number of rotor pole pairs | 4 |
Number of modulators | 5 |
Permanent magnet material | N42SH |
Core material | M250-35A |
Maximum flux density | 1.6 T |
Loss Category | Loss Component | Physical Mechanism | Calculation Method | Reference |
---|---|---|---|---|
Core Losses | Hysteresis Loss | Magnetic domain wall movement | [14] | |
Eddy Current Loss | Induced currents in core material | [13] | ||
Excess Loss | Micro-eddy currents | [13] | ||
Copper Losses | DC Resistive Loss | Joule heating in conductors | [1] | |
Skin Effect Loss | Current density redistribution | [15] | ||
Proximity Effect Loss | Adjacent conductor interaction | [10] | ||
Mechanical Losses | Bearing Friction Loss | Contact friction in bearings | [4] | |
Windage Loss | Air friction on rotating surfaces | [9] |
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Mai, Q.; Hu, Q.; Chen, X. A Comprehensive Analysis of the Loss Mechanism and Thermal Behavior of a High-Speed Magnetic Field-Modulated Motor for a Flywheel Energy Storage System. Machines 2025, 13, 465. https://doi.org/10.3390/machines13060465
Mai Q, Hu Q, Chen X. A Comprehensive Analysis of the Loss Mechanism and Thermal Behavior of a High-Speed Magnetic Field-Modulated Motor for a Flywheel Energy Storage System. Machines. 2025; 13(6):465. https://doi.org/10.3390/machines13060465
Chicago/Turabian StyleMai, Qianli, Qingchun Hu, and Xingbin Chen. 2025. "A Comprehensive Analysis of the Loss Mechanism and Thermal Behavior of a High-Speed Magnetic Field-Modulated Motor for a Flywheel Energy Storage System" Machines 13, no. 6: 465. https://doi.org/10.3390/machines13060465
APA StyleMai, Q., Hu, Q., & Chen, X. (2025). A Comprehensive Analysis of the Loss Mechanism and Thermal Behavior of a High-Speed Magnetic Field-Modulated Motor for a Flywheel Energy Storage System. Machines, 13(6), 465. https://doi.org/10.3390/machines13060465