Field-Weakening Performance Improvement of the Yokeless and Segmented Armature Axial Flux Motor for Electric Vehicles

Wang, Xiaoyuan; Xu, Sijia; Li, Chunpeng; Li, Xiang

doi:10.3390/en10101492

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…For example, researchers have explored a new five-phase BFSPM for FESSs and generators with iron or hollow core stators [52,53]. Illustrations of some PM motor structures can be seen in Figures 7-9 [47,[54][55][56][57]. and suitability for high-speed operations.…”

Section: Permanent-magnet Motors For Flywheel Energy Storage Systemsmentioning

confidence: 99%

A Review of Flywheel Energy Storage System Technologies

Xu,

Guo,

Lei

et al. 2023

Energies

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The operation of the electricity network has grown more complex due to the increased adoption of renewable energy resources, such as wind and solar power. Using energy storage technology can improve the stability and quality of the power grid. One such technology is flywheel energy storage systems (FESSs). Compared with other energy storage systems, FESSs offer numerous advantages, including a long lifespan, exceptional efficiency, high power density, and minimal environmental impact. This article comprehensively reviews the key components of FESSs, including flywheel rotors, motor types, bearing support technologies, and power electronic converter technologies. It also presents the diverse applications of FESSs in different scenarios. The progress of state-of-the-art research is discussed, emphasizing the use of artificial intelligence methods such as machine learning, digital twins, and data-driven techniques for system simulation, fault prediction, and life-assessment research. The article also addresses the challenges related to current research and the application of FESSs. It concludes by summarizing future directions and trends in FESS research, offering valuable information for further advancement and improvement in this field.

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Section: Permanent-magnet Motors For Flywheel Energy Storage Systemsmentioning

confidence: 99%

A Review of Flywheel Energy Storage System Technologies

Xu,

Guo,

Lei

et al. 2023

Energies

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“…In response to the speed control issue for the walking wheel motor of inspection robots along power transmission lines during downhill descents, traditional speed control methods for DC motors typically involve techniques such as weak magnetic speed control [6], series resistor speed control [7], and voltage adjustment speed control [8] to regulate the downhill speed of the robot. Hu et al effectively controlled the passive downhill speed of inspection robots by employing energy consumption braking and pulse width modulation techniques [9].…”

Section: Introductionmentioning

confidence: 99%

Research on Speed Control Methods and Energy-Saving for High-Voltage Transmission Line Inspection Robots along Cable Downhill

Yang,

Liu,

Ning

et al. 2023

Actuators

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To ensure the safe operation of high-voltage transmission line inspection robots during downhill descents without power and extend their range after a single charge, this paper proposes an energy-saving speed control method for the inspection robot’s walking wheel motor on downhill slopes by integrating feedback braking and fuzzy PID control. By combining the parameter equation of the overhead catenary line and the structural characteristics of the overhead transmission line, this paper analyzes the relationship between the driving torque of the inspection robot’s wheels and the horizontal displacement along the transmission ground wire before and after descending. Based on this analysis, a speed control and energy recovery scheme is developed for the inspection robot, which combines front-wheel feedback braking with rear-wheel regenerative braking. The fuzzy PID method is utilized to adjust the PWM duty cycle to achieve energy-efficient speed control of the inspection robot’s rear walking wheels. Additionally, to improve the energy density and specific power of the robot’s energy storage unit, a composite power source consisting of lithium batteries and supercapacitors is employed to recover energy from the front walking wheels through feedback braking. The combined simulation results indicate that, compared to fuzzy control and PID control, fuzzy PID control better regulates the robot’s speed under varying slopes, wind resistance, and cable roughness. A downhill speed control system for the inspection of the robot’s walking wheel motor was designed, and its effectiveness was validated through simulated high-voltage line experiments. The fuzzy PID control was demonstrated to effectively maintain the rear walking wheel speed within the targeted range during downhill descents. When descending along a fixed 30° angle cable, the fuzzy PID control resulted in an increase of 5.28% and 14.26% in the state of charge (SOC) of the supercapacitor compared to PID control and fuzzy control, respectively. Moreover, when descending along fixed angle cables of 10°, 20°, and 30°, as well as a variable angle cable ranging from 30° to 0°, the SOC of the supercapacitor increased by 17.55%, 26.25%, 38.45%, and 31.29%, respectively. This demonstrates the effective absorption of regenerative braking energy during the robot’s downhill movement.

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“…Since the interior permanent magnet motors (IPMMs) can utilize the reluctance torque, they have the advantages of high torque density, high efficiency, extended speed range. Therefore, they are widely used in these vehicles [1][2][3]. The analysis of the armature reaction field is the most critical issue in the study of IPMMs since it determines the characters of torque, efficiency, vibration, and the radiated acoustic noise [4,5].…”

Section: Introductionmentioning

confidence: 99%

Analytical Calculation of Armature Reaction Field of the Interior Permanent Magnet Motor

Yin

Wei

et al. 2018

Energies

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The energy crisis and environmental concerns worldwide have helped usher in the age of electric vehicles (EVs) and hybrid EVs (HEVs). The interior permanent magnet motors (IPMMs) are widely used in these vehicles. The analysis of the armature reaction field is the most critical issue in the study of IPMMs since it determines the characters of torque, efficiency, vibration, and the radiated acoustic noise. This paper provides a calculation method of the armature reaction magnetic field (ARMF) of an IPMM. First, the formulas of ARMF without magnetic barrier are derived. Second, the relative permeance function of an IPMM is calculated. Third, the analytical solution of the ARMF of an IPMM is derived by applying the armature reaction magnetic field with unsaturated rotor multiplied by relative permeance function. Finally, several results of comparisons between the calculation method proposed in this paper and the finite element method are presented. Based on the calculation method proposed in this paper, the magnetic barrier’s influence on the ARMF is studied. The spatial harmonic orders and time harmonic orders of the ARMF of IPMM are revealed respectively.

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Field-Weakening Performance Improvement of the Yokeless and Segmented Armature Axial Flux Motor for Electric Vehicles

Cited by 8 publications

References 9 publications

A Review of Flywheel Energy Storage System Technologies

A Review of Flywheel Energy Storage System Technologies

Research on Speed Control Methods and Energy-Saving for High-Voltage Transmission Line Inspection Robots along Cable Downhill

Analytical Calculation of Armature Reaction Field of the Interior Permanent Magnet Motor

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