Results 1 to 10 of about 7,072 (73)
Analysis of Air-Gap Magnetic Field and Structure Optimization Design of Hollow-Cup Motor
Aerospace, 2022 Hollow-cup motors are usually used in spacecraft because of their low power consumption and high control accuracy. However, because the air-gap between the permanent magnets (PMs) and the rotor of the hollow-cup motor is uniform, the sinusoidal ...
Jinji Sun +3 more
doaj +4 more sources
A Novel Design of Permanent Magnets for the Air Gap Magnetic Field of Hollow-Cup Motor
Applied Sciences, 2023 Spacecraft motors are often driven with trapezoidal phase currents to achieve higher output torque. For hollow cup motors (HCM) driven by trapezoidal wave currents, parallel magnetised permanent magnet (PM) motors produce an air gap magnetic field (AMF ...
Jinji Sun, Haoxi Sun, Xueping Xu
doaj +4 more sources
A Novel Design of an Inner Rotor for Optimizing the Air-Gap Magnetic Field of Hollow-Cup Motors
Machines, 2022 In order to obtain a high power density, spacecraft usually use hollow-cup motors with trapezoidal air-gap magnetic field waveforms. However, due to structural issues, the hollow-cup motor has the problem that the waveform of the air-gap magnetic field ...
Jinji Sun, Jianyi Ren, Haoxi Sun
doaj +4 more sources
Loss Research and Thermal Analysis of BLDC Hollow-Cup Motor Under Reactor Suppression
Applied SciencesIn order to avoid overheating of a BLDC permanent magnet (PM) motor at high speeds, this paper focuses on the loss reduction of a 90 W 47,000 r/min BLDC hollow-cup motor.
Jingjuan Du +4 more
doaj +4 more sources
Low voltage optical fiber positioner robot based on minimum inductance hollow cup motors
Scientific Reports, 2022 With the further transformation of The Large Sky Area Multi-Object Fiber Spectroscopic Telescope, the new generation of fiber positioner robot chooses a 4 mm hollow cup motor with minimum phase inductance.
Shaoxiong Guo, Chao Zhai, Songlin Bi
doaj +2 more sources
A 4 mm Micro Servo Control System in Fiber Positioner
Actuators, 2023 As multi-object spectrographs (MOSs) continue to evolve, a notable trend has emerged—the increasing accommodation of fiber positioners on ever-more compact focal planes.
Shaoxiong Guo, Yan Yang, Chao Zhai
doaj +2 more sources
Measurement + Control, 2008 There are various applications of permanent magnet brushless DC motor (BDCM). They offer a number of attractive features and could meet the requirements coming from new generation satellites such as high attitude precision, high maneuver capacity and ...
Liu Gang, Fang Jiancheng, Liu Jianzhang
doaj +2 more sources
Sinusoidal Rotor Core Shape for Low Torque Ripple in Hollow-Cup Machines
EnergiesDue to the configuration of coreless stators and two synchronously rotated rotors, hollow-cup machines (HCMs) enjoy the merits of negligible cogging torque and core loss.
Liu Zhang, Pengfei Song, Xikai Liu
exaly +2 more sources
Psychology of Sport And Exercise, 2023 In this study we explored training effects for combined action observation and motor imagery (AO + MI) instructions on a complex cup-stacking task, without physical practice.
J. Binks +3 more
semanticscholar +1 more source
Angewandte Chemie, EarlyView.Photocycloaddition in stilbene‐type salt polymorphs exhibit distinct light‐driven responses: OHT‐TI shows a violent photosalient effect under visible and NIR (two‐photon) irradiation, whereas OHT‐TII reacts statically. Packing and computational analysis reveals that shell‐like structures in OHT‐TI frustrate structural relaxation, accumulating explosive
Emanuela Santagata +10 more
wiley +2 more sources