Analysis, Modeling, and Verification of Limited Angle Torque Motors With Irregular Slot Numbers for Performance Improvement

Li, Yong; Ma, Pengcheng; Wang, Qian; Zhao, Meng

doi:10.1109/tec.2020.2969266

Cited by 8 publications

(6 citation statements)

References 15 publications

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“…In the conventional method, the LATM operates only in the constant region, while the operational range of the LATM using the new method includes both the constant torque region and the linear region. It is easy to deduce that the wider the constant torque region is, the smaller the motor torque coefficient [15]. For LATMs having the same operating range, the constant torque region of the LATM using the new method is narrower, and thus it has a higher torque density, which results in smaller volume and lighter weight.…”

Section: Operational Range Extension Methodsmentioning

confidence: 99%

“…Thus, this kind of LATM is selected as the object for application of the new method. The motor model built in reference [15] has a large deviation from the actual motor. Thus, it must be modified to improve the accuracy of the motor model.…”

Section: Modified Mathematical Modelmentioning

confidence: 99%

“…In addition, it is complex to model the LATM when considering the effect of the cogging torque. The cogging torque of the LATM with an irregular slot number is small, as has been studied in reference [15]. Thus, this kind of LATM is selected as the object for application of the new method.…”

Section: Modified Mathematical Modelmentioning

confidence: 99%

“…This method is proven effective in improving the power density of the LATM, but it results in nonlinear torque change in the constant torque region. The operational range extension method using the linear region of the angle‐torque characteristic is proposed in [15]. The power density of the LATM can be improved by this method, but the operational range includes both the constant torque region and the linear region, resulting in more complex torque characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…However, this method still relies on the results of finite element analysis (FEA), and the process of establishing the simulation model is complex, which means that it is neither convenient nor fast enough. Based on the magnetic circuit method, an ideal model of a motor with irregular slot numbers is established in [15]. The model can be conveniently applied in simulation, but accuracy is poor.…”

Section: Introductionmentioning

confidence: 99%

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Operational range extension method for limited‐angle torque motors with irregular slot numbers

Wang

et al. 2021

IET Electric Power Appl

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A modified model of a limited-angle torque motor (LATM) with irregular slot numbers is proposed for developing an operational range extension method for LATMs. The modified model is derived by considering the effects of the asymmetrical winding structure and magnetic flux leakage, which are validated by finite element analysis and experimental measurements. Based on the modified model, accuracy and time consumption of the simulation can be improved. For the operational range extension method, extended angle range selection theory and constraint conditions are proposed, and the relationship between the sinusoidal tracking characteristic and leading parameters is established by theoretical analysis. A simulation and a prototype machine experiment on an LATM using the new method are carried out. The results show that the proposed operational range extension method can reduce the weight and volume of the LATM without changing sinusoidal tracking characteristics, which proves the feasibility of applying the new method in the oscillating scan system to realize lightness and miniaturisation of the system.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Section: Operational Range Extension Methodsmentioning

confidence: 99%

Section: Modified Mathematical Modelmentioning

confidence: 99%

Section: Modified Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Operational range extension method for limited‐angle torque motors with irregular slot numbers

Wang

et al. 2021

IET Electric Power Appl

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Dynamics analysis and verification for slotted limited-angle torque motor in electromagnetic valve applications

Cheng,

Tao,

Han

et al. 2024

J. Phys.: Conf. Ser.

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Limited-angle torque motor (LATM) as a key component of the exhaust gas recirculation (EGR) valve, which can precisely control the position of the EGR valve, thus achieving dynamic adjust the amount of exhaust gas recirculation. This paper introduces the dynamic analysis, modelling and experimental validation of a concentrated winding axial-flux slotted LTAM with 4-poles/4-slots. Aiming at the prominent issues such as cogging torque and nonlinear torque characteristics in the operating region of slotted LATMs, analytical equations are derived based on the magnetic circuit to predict the torque-angle characteristics of LATM, covering both constant torque and linear torque regions. These equations help establish the relationship between performance and key parameters, enabling rapid design of LATM. The test results indicate that the proposed model can accurately describe the electromagnetic torque and cogging torque of the LTAM, with an error range of 5%. Utilizing the effective angle range proposed in this paper, an approximate linear relationship between the electromagnetic torque and current can be achieved, with a linear error of 6%.

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Investigation of Axial-Flux Limited-Angle Torque Motor with Tooth-Tip Structure for Torque Performance Improvement

Zhou,

Yang,

et al. 2023

2023 26th International Conference on Electrical Machines and Systems (ICEMS)

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Analysis, Modeling, and Verification of Limited Angle Torque Motors With Irregular Slot Numbers for Performance Improvement

Cited by 8 publications

References 15 publications

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Dynamics analysis and verification for slotted limited-angle torque motor in electromagnetic valve applications

Investigation of Axial-Flux Limited-Angle Torque Motor with Tooth-Tip Structure for Torque Performance Improvement

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