Fault-tolerant system and method for switch open circuit fault 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 the fault-tolerant operation ability, etc., to improve the fault redundancy ability and realize fault tolerance. Effect

Active Publication Date: 2021-12-03
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 bearing series winding controller, the purpose of which is to solve the problem that the existing series winding controllers do not have The problem of fault-tolerant operation ability

Method used

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  • Fault-tolerant system and method for switch open circuit fault of magnetic bearing series winding controller
  • Fault-tolerant system and method for switch open circuit fault of magnetic bearing series winding controller
  • Fault-tolerant system and method for switch open circuit fault of magnetic bearing series winding controller

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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 for a magnetic bearing series winding controller, which comprises 2N windings in series, 2N+1 bridge arms and a DC voltage source; the upper ends of each bridge arm are connected to the DC voltage The positive pole of the source is connected, and the lower end is connected with the negative pole of the DC voltage source; the present invention uses a series winding topology as the winding topology of the magnetic suspension bearing controller, and each switching element has an independent block, and the failure of a single switching element will not affect other At the same time, it does not have much influence on the diodes placed separately. Therefore, in the fault-tolerant system, when a single switching element fails, other remaining switching elements can still be used to achieve stable control of the magnetic suspension bearing system. In normal working mode and fault-tolerant Smooth switching in the working mode ensures that the rotor does not fall; in the event of an open circuit failure of the switching device, the system can be guaranteed to run without stopping in the fault-tolerant working mode, which effectively improves the fault redundancy capability of the magnetic suspension bearing system.

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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Patent Type & Authority Patents(China)
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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