A series winding control device and method applied to magnetic suspension bearings
A technology of magnetic suspension bearings and series windings, which is applied to bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of reducing the number of components, uncontrollable circulation of the four-bridge arm controller of the ring topology, etc., and achieves improved control effects and good practicability , The effect of improving the utilization rate
Active Publication Date: 2021-08-03
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] In view of the defects of the prior art, the object of the present invention is to provide a series winding 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, and the ring Uncontrollable Circulation Current in Topological Four-leg Controller
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[0055] 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.
[0056] 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 3 The generated electromagnetic force is jointly determined, and the electromagnetic force F in the y direction y through winding A 2 The resulting electromagnetic force and winding A 4 The resulting electromagne...
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The invention discloses a series winding control device and method applied to magnetic suspension bearings, belonging to the field of magnetic suspension bearing control, comprising five unidirectional conduction devices, five controllable switches, four windings and a power supply. Change the conduction time of each controllable switch in one switching cycle to control the current passing through each winding. By dividing the four windings into two groups and controlling the common mode current and differential mode current of the windings, the control of the two in the magnetic suspension bearing is realized. Control of 4 winding currents with 4 degrees of freedom. Four windings of the present invention are connected in series, and only five bridge arms are needed to control the four windings of a single eight-pole radial magnetic bearing, and two bridge arms are needed to control a single coil in an ordinary bridge circuit, which effectively improves the device utilization rate. At the same time, the controller provided by the invention can realize higher voltage utilization ratio when controlling the differential mode 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 series winding 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 magnetic sus...
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IPC IPC(8): F16C32/04
CPCF16C32/0444
Inventor 蒋栋杨佶昌胡载东孙宏博李安
Owner HUAZHONG UNIV OF SCI & TECH