Five-degree of freedom magnetic suspension single sheet DLP (digital light procession) color wheel drive system
A drive system and magnetic levitation technology, applied in the field of digital light processing, can solve the problems of increasing the scale of the control system, the use and high operating cost of the magnetic bearing system, and achieve the effect of reducing maintenance costs, broad market application prospects, and realizing full levitation
Inactive Publication Date: 2012-02-22
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
View PDF0 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] According to Earnshaw's theory, the suspension of all five degrees of freedom of the rotor cannot be achieved simply by using passive magnetic bearings. Therefore, if the five-degree-of-freedom suspension of the color wheel rotor is to be realized, the supporting system must have active magnetic bearings. However, if active magnetic bearings are used in multiple degrees of freedom, the scale of the control system will be increased, resulting in higher use and operating costs of the magnetic bearing system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0026] In this embodiment, the larger size and mass of the actual application product of the color wheel are used as the load, that is, the diameter is 100 mm, the total mass is 20 g, and the speed requirement is 8 times the speed, that is, 28800 rpm. The passive magnetic bearing is composed of two permanent magnet rings made of NdFeB magnets nested together. The air gap length between the two magnetic rings is 0.2mm, radially magnetized, and the residual magnetic flux density of the permanent magnet material B r =1.2T, coercivity H c =900kA / m. The outer diameter of the stator magnetic ring is 11.4mm, the inner diameter is 7.4mm, the outer diameter of the rotor magnetic ring is 7mm, the inner diameter is 3mm, and the axial length is 2mm. The axial displacement stiffness K can be obtained by calculating the displacement stiffness using the finite element analysis software. a ≈-1.2×10 3 N / m, radial displacement stiffness K r ≈0.6×10 3 N / m. The parameters of the active axia...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a five-degree of freedom magnetic suspension single sheet DLP (digital light procession) color wheel drive system which comprises a color wheel and a main shaft traversing the color wheel. The main shaft is provided with a passive radial magnetic bearing A rotor, a driving motor rotor, a passive radial magnetic bearing B rotor, an active axial direction magnetic bearing stator B and an active axial direction magnetic bearing rotor in order. An opposite side of the active axial direction magnetic bearing rotor is provided with an active axial direction magnetic bearing stator A. An outer ring of the passive radial magnetic bearing A rotor is provided with a passive radial magnetic bearing A stator. An outer ring of the driving motor rotor is provided with a driving motor stator. An outer ring of the passive radial magnetic bearing B rotor is provided with a passive radial magnetic bearing B stator. According to the invention, full suspension of the rotors is realized, noise of system operation is lowered, a structure of a magnetic bearing system is simplified, and usage cost is reduced.
Description
technical field [0001] The invention relates to a single-chip DLP (Digital Light Processing, ie digital light processing) color wheel drive system in the technical field of digital light processing, in particular to a five-degree-of-freedom magnetic levitation single-chip DLP color wheel drive system. Background technique [0002] The color wheel is a unique and important device in a single-chip DLP projector. Its function is to decompose the white light generated by the light source into RGB three primary colors, and provide it to the imaging device for image display output. As the only high-speed rotating device in a single-chip DLP projector, the color wheel has extremely high requirements on the rotational speed, accuracy and stability of the supporting bearing. [0003] Due to the mechanical contact between the stator and the rotor, traditional mechanical bearings have the disadvantages of high energy consumption and high noise at high speeds, and require lubrication an...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/00G03B21/14H02N15/00
Inventor 余思琛李晓杰章振生
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP