A ring topology four-bridge arm control device and method applied to magnetic suspension bearings
A magnetic levitation bearing and ring topology technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problem of reducing the number of components, etc., and achieve the effects of improving control effect, improving utilization rate, and good practicability
Active Publication Date: 2020-10-16
HUAZHONG UNIV OF SCI & TECH
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a ring topology four-bridge arm control device and method applied to magnetic suspension bearings, aiming to solve the problem that the existing active magnetic suspension bearing system cannot greatly reduce the number of components
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
[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0051] figure 1 is the structure diagram of a single radial magnetic bearing, the radial magnetic bearing structure has two orthogonal directions x-direction electromagnetic force F x and the electromagnetic force F in the y direction y Need to control. Among them, the electromagnetic force F in the x direction x through winding A 1 The resulting electromagnetic force and winding A 2 The generated electromagnetic force is jointly determined, and the electromagnetic force F in the y direction y through winding A 3 The resulting electromagnetic force and winding A 4 The resulting electromagne...
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 ring topology four-bridge-arm control device and a ring topology four-bridge-arm control method applied to a magnetic suspension bearing, which belong to the field of magnetic suspension bearing control. The ring topology four-bridge-arm control device comprises four one-way conduction devices, four controllable switches, four windings and a power supply. According to thering topology four-bridge-arm control method, a current passing through each winding is controlled by changing the conduction time of each controllable switch in one switching period, and the four windings are divided into two groups to control the common-mode current and the differential-mode current in the windings, so that the control of the currents of the four windings with two degrees of freedom in the magnetic suspension bearing is realized; the four windings are annularly connected, only four bridge arms are needed to control the four windings of a single octopole radial magnetic bearing, and two bridge arms are needed to control a single coil in a common bridge circuit, so that the utilization rate of the device is effectively improved; and a relatively high voltage utilization rate can be realized when the controller provided by the invention is used for controlling a differential current between the two windings.
Description
technical field [0001] The invention belongs to the field of magnetic suspension bearing control, and more specifically relates to a ring-shaped four-bridge arm control device and method applied to magnetic suspension bearings. Background technique [0002] Magnetic suspension bearing is a bearing device that uses electromagnetic force to levitate the rotor, thereby replacing traditional mechanical bearings and realizing non-contact operation between the rotor and the stator. Since there is no mechanical contact between the rotor and the stator, it has the characteristics of no need for lubrication, no mechanical friction, no pollution, good stability, and long working life. Magnetic suspension bearings are widely used in energy storage flywheels, aviation equipment and other fields, where the rotor needs to rotate at high speed or ultra high speed or has high requirements on the working environment. As early as the 1940s, foreign scholars had conducted in-depth research on...
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
CPCF16C32/0451F16C32/0459
Inventor 蒋栋杨佶昌胡载东孙宏博
Owner HUAZHONG UNIV OF SCI & TECH