Research on Ceramic Spindle Loss Based on Ceramic Reverse Magnetic Effect

Zhang, Ke; Wang, Zinan; Bai, Xiaotian; Shi, Huaitao; Li, Songhua

doi:10.1155/2020/7418719

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…According to the classical iron consumption Bertotti theory, the iron consumption of ceramic spindle is determined as shown in equation (2). 20 where k c is the hysteresis coefficient of ceramic material, k h is the hysteresis loss coefficient, k e is the electrical conductivity of iron core, K a is the abnormal loss coefficient, B m is the peak magnetic field density in period, f n is frequency. (2) Bearing friction …”

Section: Establishment Of Modelmentioning

confidence: 99%

Analysis of dynamic characteristics of ceramic spindle considering the thermal magnetic coupling effect

Wang

Zhang

Bai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The ceramic spindle rotor system is widely used in CNC machine tools. However, the dynamic characteristics are influenced by the magnetic forces and thermal deformation, which leads to the reduction of running accuracy. In this paper, the thermal deformation of the rotor system are calculated, and the magnetic field distribution is obtained based on the Maxwell theory. The thermal magnetic coupling effect is then analyzed to investigate the interaction between thermal deformation and magnetic force, and the impact of thermal magnetic coupling effect on the dynamic characteristics is obtained. Experiments are conducted to verify the simulation results, and the dynamic characteristics with and without consideration of thermal magnetic coupling effect are compared. Results show that the thermal deformation and magnetic force have nonlinear increases with speed, and the model considering the thermal magnetic coupling effect has a higher accuracy with the error decreased by 4%. The air gap is a key factor that determines the dynamic characteristics of the ceramic spindle rotor system, and a larger air gap can help lower the vibration at high speed. This study provides a theoretical basis for the structural design of ceramic spindle rotor system.

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Section: Establishment Of Modelmentioning

confidence: 99%

Analysis of dynamic characteristics of ceramic spindle considering the thermal magnetic coupling effect

Wang

Zhang

Bai

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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“…Where f b is the ball sliding friction can be calculated by equation (36), and μ is friction factor which can be calculated in equation (37), μ ′ for empirical value of 0.002. 29…”

Section: Dynamic Model Of Full-ceramic Motorized Spindle Considering ...mentioning

confidence: 99%

Nonlinear dynamic characteristics of full-ceramic motorized spindle considering axial transfer of unbalanced magnetic pull

Zhang

Liqi

Zhan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Full-ceramic motorized spindle is suitable for high-grade CNC machine tool due to its high stiffness and wear resistance, while axial transfer of unbalanced magnetic pull (UMP) caused by reverse magnetic characteristic leads to random vibration at the shaft end. In order to investigate the nonlinear dynamics of full-ceramic motorized spindles under the influence of reverse magnetic, a five-degree-of-freedom dynamic model of bearing-rotor system considering the axial transfer of UMP is constructed. The improved transfer matrix method is proposed to establish the axial transfer model of UMP and the vibration mode of the shaft is obtained. The dynamic characteristics of the bearing-rotor system are analyzed considering the effect of UMP. The magnetic field density and vibration characteristics of the motorized spindle system is studied, and the full-ceramic motorized spindle shaft influence of UMP axial transfer, the vibration of the rotor tends to decrease from inward to outward, while the shaft end vibration also tends to increase gradually with the increase of rotation speed and eccentricity value. The results show that the vibration of ceramic shaft end is 55.4% weaker than that of metal shaft end. It can be seen that under the action of the diamagnetic property, UMP transfer occurs on the ceramic shaft, which reduces the vibration. The experiments show that the average error between the calculated value and the experimental result is 8.5% at the operating speed, which verifies the accuracy of the model developed in this paper.

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“…At present, the modeling methods of PMSM inter-turn short circuit fault are mainly divided into five categories: coordinate change method, multi-loop method, field-circuit coupling method, phase coordinate method and winding segmentation method. Among them, the method of dq coordinate transformation and the method of symmetrical component are widely used in the analysis of various asymmetry problems of motor [11][12][13] . The PMSM system after fault is decomposed into positive sequence, negative sequence and zero sequence components by symmetric component method.…”

Section: Introductionmentioning

confidence: 99%

Servo motor fault detection for construction robot base on observer

jinbao,

ke,

huaitao

et al. 2023

Sixth International Conference on Intelligent Computing, Communication, and Devices (ICCD 2023)

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In this paper, a fault diagnosis scheme based on observer is proposed to solve the problem of servo motor fault in construction robot actuator system. Firstly, the mathematical model is established in abc coordinate system, and Park transformation is introduced to transform abc three-phase symmetry variable into dq coordinate DC through Park transformation, which greatly reduces the modeling complexity in normal state of motor, eliminate redundant motor models. Based on this, the state space equations are constructed and an interval observer is designed. Compared with the traditional Luenberger interval observer, the interval observer proposed in this paper has better decoupling performance in solving the gain matrix, at the same time, it directly improves the robustness of the interval observer and the sensitivity to the fault signal under the electromagnetic interference. Finally, the method is verified on the fault simulation test-bed, which proves the feasibility of the proposed method, and further improves the timeliness of fault detection of servo motor in construction robot actuator system.

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Research on Ceramic Spindle Loss Based on Ceramic Reverse Magnetic Effect

Cited by 4 publications

References 26 publications

Analysis of dynamic characteristics of ceramic spindle considering the thermal magnetic coupling effect

Analysis of dynamic characteristics of ceramic spindle considering the thermal magnetic coupling effect

Nonlinear dynamic characteristics of full-ceramic motorized spindle considering axial transfer of unbalanced magnetic pull

Servo motor fault detection for construction robot base on observer

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