Constant-current source bias outer rotor axial magnetic bearing
A technology of axial magnetic bearings and constant current sources, which is applied in the direction of shafts and bearings, bearings, mechanical equipment, etc., can solve the problems of high cost and high power consumption of power amplifiers, reduce power consumption, improve work performance, and simplify drive control The effect of the method
Active Publication Date: 2015-02-04
JIANGSU UNIV
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The Chinese patent publication number is CN101311571 and the name is "Constant Current Source Biased Magnetic Suspension Bearing". Together, the control coils on each degree of freedom are connected in series or in parallel. The magnetic bearing of this structure uses two power amplifiers for one degree of freedom (an independent power amplifier makes the bias coil provide constant current Bias flux, a separate power amplifier makes the control coil provide the control flux with constant current), so the power consumption is high, and the cost of the power amplifier is relatively high
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 Construction
[0016] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the present invention is an outer rotor magnetic bearing structure, including an outer rotor 1 and an inner stator core 4 that are coaxially installed. The rotor 1 is the outer shell of the magnetic bearing and is located at the outermost periphery of the magnetic bearing. The rotor 1 is in the shape of a cylinder. The rotor 1 is sheathed with a stator core 4. The stator core 4 is made of laminated silicon steel sheets, and the rotor 1 is made of electrical pure iron to ensure good magnetic permeability, low hysteresis, and minimize eddy current loss and hysteresis loss.
[0017] Such as Figure 3-4 As shown, the rotor 1 is formed by connecting two identical discs 12, a large annular body 11 and two identical small annular bodies 13 together. A large circular ring body 11 is fixedly connected between the axial directions of two identical circular disks 12, and the outer diameter of the large circular ring bod...
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 constant-current source bias outer rotor axial magnetic bearing for non-contact suspension supporting. A stator iron core is sleeved inside a rotor coaxially. Axial air gaps are arranged between the rotor and two end surfaces of the stator iron core at the axial direction. The stator iron core has four same stator iron core magnetic poles that are uniformly arranged along the circumferential direction of the axis center and are extended towards the inner side wall of the rotor; and there are radial air gaps between the four stator iron core magnetic poles and the rotor at the radial direction. Same constant-current source bias coils are wound on the four stator iron core magnetic poles; and the four constant-current source bias coils are connected in series and then are connected with a constant-current source. Two axial control coils that are symmetrically along the axis center are arranged in a cavity between the stator iron core and the rotor; and the two axial control coils are connected in series and then are connected with a power amplifier. Only one power amplifier is used to enable the control coils to provide control magnetic fluxes; and the bias coils provide bias currents directly by the constant-current source. Therefore, the volume and the cost of a power amplification circuit are reduced and the working performance of the magnetic bearing is enhanced.
Description
technical field [0001] The invention relates to a non-mechanical contact magnetic suspension bearing, in particular to a constant current source biased outer rotor axial magnetic bearing, which can be used as non-contact suspension of rotating parts in systems such as outer rotor motors, outer rotor axial fans, outer rotor centrifugal fans, etc. support. Background technique [0002] Magnetic suspension bearing (magnetic bearing) is a new type of support bearing that uses magnetic field force to suspend the rotor in space so that it has no mechanical contact with the stator. It has no friction, no wear, no lubrication and sealing, high speed, high precision and long life. Etc. Magnetic bearings can be divided into passive magnetic bearings, active magnetic bearings and permanent magnetic bias hybrid magnetic bearings according to the way the magnetic force is provided. The constant current source biased magnetic bearing is a new type of magnetic bearing with low cost, low ...
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 Patents(China)
IPC IPC(8): F16C32/04
Inventor 张维煜朱熀秋
Owner JIANGSU UNIV