Switch open circuit fault tolerance system and method of magnetic bearing series winding controller

A series winding, open circuit fault technology, applied in the direction of bearings, shafts and bearings, output power conversion devices, etc., can solve the problem that the series winding controller does not have fault-tolerant operation capabilities, etc.

Active Publication Date: 2021-04-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a fault-tolerant system and method for switch open circuit faults of a magnetic

Method used

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  • Switch open circuit fault tolerance system and method of magnetic bearing series winding controller
  • Switch open circuit fault tolerance system and method of magnetic bearing series winding controller
  • Switch open circuit fault tolerance system and method of magnetic bearing series winding controller

Examples

Experimental program
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Embodiment 1

[0058] A fault-tolerant system for switch opening faults applied to magnetic bearing series winding controllers, such as figure 2 As shown, including: 5 bridge arms, 4 windings and 1 DC voltage source;

[0059] The above five bridge arms include a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm and a fifth bridge arm;

[0060] The above four windings include winding A1, winding A2, winding A3 and winding A4;

[0061] The output node of the first bridge arm is connected to the first end of the winding A1, the output node of the second bridge arm is connected to the second end of the winding A1; the output node of the second bridge arm is connected to the first end of the winding A2, and the third The output node of the bridge arm is connected to the second end of the winding A2; the output node of the third bridge arm is connected to the first end of the winding A3, and the output node of the fourth bridge arm is connected to the second end of t...

Embodiment 2

[0068] A kind of fault-tolerant method of switch open circuit fault fault-tolerant system described in embodiment 1, such as image 3 shown, including:

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Abstract

The invention discloses a switch open-circuit fault tolerance system and method of a magnetic bearing series winding controller. The system comprises 2N windings connected in series, 2N + 1 bridge arms and a direct-current voltage source. and the upper end of each bridge arm is connected with the anode of the direct-current voltage source, and the lower end of each bridge arm is connected with the cathode of the direct-current voltage source. The series winding topology is adopted as the winding topology of a magnetic suspension bearing controller, each switching element is provided with an independent block, other elements are not affected when a single switching element breaks down, meanwhile, a diode placed independently is not greatly affected, and therefore in the fault-tolerant system, when the single switching element breaks down, other residual switching elements can still be used for realizing stable control of a magnetic suspension bearing system, and smooth switching between a normal working mode and a fault-tolerant working mode is realized, thereby ensuring no falling of a rotor; and when an open circuit fault of a switching device occurs, the system can be ensured to operate without shutdown in a fault-tolerant working mode, and the fault redundancy capability of the magnetic suspension bearing system is effectively improved.

Description

technical field [0001] The invention belongs to the field of magnetic suspension bearing control, and more specifically relates to a fault-tolerant system and method for a switch disconnection fault of a magnetic bearing series winding controller. Background technique [0002] Magnetic suspension bearing is a bearing device that uses electromagnetic force to levitate the rotor. It can replace traditional mechanical bearings and realize non-contact operation between the rotor and the stator. There is no mechanical contact between the rotor and the stator, and it has the characteristics of no need for lubrication, no friction, and long working life. Magnetic suspension bearings are widely used in applications where the rotor needs to rotate at high speed or has high requirements on the working environment. For the active magnetic suspension bearing system, it mainly includes the rotor, sensor, controller and electromagnetic actuator, etc. The design of its control system has ...

Claims

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Application Information

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IPC IPC(8): F16C32/04H02M1/32
CPCF16C32/0442F16C32/0451H02M1/32
Inventor 蒋栋杨佶昌孙宏博李安刘自程
Owner HUAZHONG UNIV OF SCI & TECH
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