Research Progress on the Application of High-speed Brushless DC Motor in Magnetically Suspended Inertial Actuator

Liu, Gang; Fang, Jiancheng; Liu, Jianzhang

doi:10.1177/002029400804100305

Cited by 4 publications

(1 citation statement)

References 13 publications

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“…By the structure and the working principle of the brushless DC motor [4], its electromotive force equilibrium equation and torque balance equation can be expressed as follows: From the above analysis, the torque-speed characteristic equations of the brushless DC motor can be obtained:…”

Section: Advanced Materials Research Vols 443-444mentioning

confidence: 99%

Research on Gear Shift Drive Mechanism of Automatic Mechanical Transmission Based on Brushless DC Motor

Zhao

2012

AMR

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In order to improve the reliability of automatic mechanical transmission (AMT) system, brushless DC motor was employed as the gear shift actuating mechanism of AMT instead of brush DC motor. Hardware circuitry and software programs of electronic control unit (ECU) were designed. Bench test was conducted and experimental results indicate that the design of gear shift actuating mechanism based on brushless DC motor meets the requirements of practical application and improves the reliability of AMT system.

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Section: Advanced Materials Research Vols 443-444mentioning

confidence: 99%

Research on Gear Shift Drive Mechanism of Automatic Mechanical Transmission Based on Brushless DC Motor

Zhao

2012

AMR

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The Application of Permanent Magnet Synchronous Motor with Small Electrical Time Constant in Fiber Positioner

Guo,

Yang,

Yin

et al. 2024

Res. Astron. Astrophys.

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With the development of cutting-edge multi-object spectrographs, fiber positioners located in focal plane are being scaled down in size, and miniature hollow-cup Permanent Magnet motors are now being considered as a suitable replacement for Faulhaber Precistep stepper motors. However, the small electrical time constant of such coreless motors poses a challenge, as the problem of severe commutation torque ripple in a fiber positioner running a position loop has been tricky. To overcome this challenge, it is advised to increase the Pulse Width Modulation frequency as much as possible to mitigate the effects of the current fluctuation. This must be done while ensuring adequate resolution of the PWM generator. By employing a voltage Open-loop Field-oriented control based on a modulation frequency of 1MHz, the drive current only costs 25mA under a 3.3V power supply. The sine degree of phase current is immaculate, and the repeat positioning accuracy can reach 2um. Moreover, it is possible to further shrink the bill of devices and the layout area of the Printed Circuit Board, especially in size-sensitive applications. This device has been developed under the new generation of The Large Sky Area Multi-Object Fiber Spectroscopic Telescope.

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Modal decoupling control for a double gimbal magnetically suspended control moment gyroscope based on modal controller and feedback linearization method

Chen

Ren

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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To effectively reject the gyroscopic effects and moving-gimbal effects of the double gimbal magnetically suspended control moment gyroscope (DGMSCMG) and to avoid high control effort, this paper proposes a novel control method based on modal decoupling strategy. Modal controller is employed to realize the modal separation of the translation and rotation modes of the magnetically suspended rotor (MSR). Then the dynamic coupling among the two rotation modes of the MSR system and the two rotational motions of the gimbal servo systems have been decoupled by using differential geometry theory. Dynamic compensation filters have been designed to improve the decoupling performance and the system stability without large control resource. Compared with the existing channel decoupling method, the presented one can not only realize the separate control of stiffness and damping of the MSR but also simplify the control system design significantly. The simulation results verify the effectiveness and superiority of the proposed method.

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Research Progress on the Application of High-speed Brushless DC Motor in Magnetically Suspended Inertial Actuator

Cited by 4 publications

References 13 publications

Research on Gear Shift Drive Mechanism of Automatic Mechanical Transmission Based on Brushless DC Motor

Research on Gear Shift Drive Mechanism of Automatic Mechanical Transmission Based on Brushless DC Motor

The Application of Permanent Magnet Synchronous Motor with Small Electrical Time Constant in Fiber Positioner

Modal decoupling control for a double gimbal magnetically suspended control moment gyroscope based on modal controller and feedback linearization method

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