High-Precision Cutting Tool Tracking With a Magnetic Bearing Spindle

Смирнов, А. В.; Pesch, Alexander H.; Pyrhönen, Olli; Sawicki, Jerzy T.

doi:10.1115/1.4029194

Cited by 11 publications

(7 citation statements)

References 13 publications

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“…It has high power and simple control [19]- [21]. These motors can support the rotors without any physical contact and have torque which replace the contact components and reduces the overall size [22]. In these types of bearingless motors, the BPMSMs have attracted considerable interests due to the advantages of the small size and light weight, the high power factor and efficiency, and no need excitation current in the main winding.…”

Section: Magnetic Bearings (Mbs) Are a New Type Of High Performancementioning

confidence: 99%

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Zhang

et al. 2019

IEEE Access

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In order to approximately obtain sinusoidal air-gap magnetic field and get larger radial levitation force of the bearingless permanent magnet synchronous motor (BPMSM), a novel BPMSM with Halbach magnetized rotor is proposed. Firstly, the suspension and rotation mechanisms of the BPMSM are introduced. The control mechanism of producing the radial levitation force in single direction and arbitrary direction is analyzed in detail. The mathematical models of the radial suspension force are given. Secondly, the comparative research on the BPMSMs with the Halbach magnetized rotor and parallel magnetized rotor is carried out. The air-gap magnetic field, back electromotive force (EMF), radial suspension force, and torque are calculated and compared. Finally, the prototype motor equipped with the Halbach magnetized rotor is constructed. Some experimental results are tested and the stable suspension operation of the proposed motor is realized.INDEX TERMS Electric machines, permanent magnet machines, AC machines, magnetic levitation, magnetic circuits.

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Section: Magnetic Bearings (Mbs) Are a New Type Of High Performancementioning

confidence: 99%

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Zhang

et al. 2019

IEEE Access

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“…Although the simulation results demonstrated that fuzzy logic control and sliding mode control did not perform better, the model was too simple to reflect the actual scenario and the control method was basic. Smirnov et al [16] and Pesch et al [17] studied magnetic bearing spindle tool tracking using PID and µ-synthesis control. They realized the tracking control of 30 um axial motion.…”

Section: With the Development Of Modern Control Theory Nonlinearmentioning

confidence: 99%

A Dual-Loop Control Approach of Active Magnetic Bearing System for Rotor Tracking Control

2019

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Rotor tracking control, which can be implemented by active magnetic bearing (AMB) system with high precision, can realize many functions, such as attitude control and special surface processing. However, large-motion rotor tracking control is difficult to implemented, due to AMB's highly nonlinear characteristics. In this paper, a dual-loop neural network sliding mode control (DL-NNSMC) system of AMB is proposed for rotor radial tracking control. The complete model of the AMB system is established and the dual-loop control system is designed. A circuit model that considers the rotor motion is established and the model-based inner loop of current control is established, conjointly for dealing with the influence of rotor motion on the current response and the unknown characteristics of the power amplifier. In the outer loop, a nonlinear electromagnetic force model is applied and a wavelet neural network sliding mode control algorithm is designed for accurate position control. Two cases of rotor trajectory tracking are simulated, and the simulation results demonstrate the validity of the proposed control system for large-motion rotor tracking control and its far superior control performance in terms of precision compared with common approaches based on sliding mode control (SMC). INDEX TERMS Active magnetic bearing, rotor tracking control, control system design, AMB system modeling, sliding mode control.

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“…In addition to eliminating machining vibration, AMBs are also superior in the regulation of spindle position. A study of tool position control with the aid of AMBs during HSM was introduced by Smirnov et al [12]. An improvement in the determination of surface micro-topography characteristics has been reported by Kim et al [13].…”

Section: Active Magnetic Bearing (Amb)mentioning

confidence: 99%

Adaptive Control of Active Magnetic Bearing against Milling Dynamics

Lee

Chen

2016

Applied Sciences

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For improving the defects in milling processes caused by traditional spindle bearings, e.g., the dimensional discrepancy of a finished workpiece due to bearing wear or oil pollution by lubricant, a novel embedded cylindrical-array magnetic actuator (ECAMA) is designed for milling applications. Since ECAMA is a non-contact type actuator, a control strategy named fuzzy model-reference adaptive control (FMRAC) is synthesized to account for the nonlinearities of milling dynamics and magnetic force. In order to ensure the superior performance of spindle position regulation, the employed models in FMRAC are all constructed by experiments. Based on the experimental results, the magnetic force by ECAMA is much stronger than that by the traditional active magnetic bearing (AMB) design under the same test conditions and identical overall size. The efficacy of ECAMA to suppress the spindle position deviation with the aid of FMRAC has been verified as well via numerical simulations and practical metal cutting.

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High-Precision Cutting Tool Tracking With a Magnetic Bearing Spindle

Cited by 11 publications

References 13 publications

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

Electromagnetic Performance Analysis on the Bearingless Permanent Magnet Synchronous Motor With Halbach Magnetized Rotor

A Dual-Loop Control Approach of Active Magnetic Bearing System for Rotor Tracking Control

Adaptive Control of Active Magnetic Bearing against Milling Dynamics

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