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Active magnetic bearing rotor falling protection method

A technology of active magnetic bearing and drop protection, applied in the field of magnetic levitation, to achieve the effect of simple cost and low cost

Pending Publication Date: 2022-03-29
北京高孚动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical solution of the present invention is to solve the problem that the existing magnetic bearing drop protection method is difficult to balance low cost and high reliability, and proposes an active magnetic bearing rotor drop protection method, which is used to reliably protect the rotor when the rotor falls. Carry out adsorption fixation and protection

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  • Active magnetic bearing rotor falling protection method
  • Active magnetic bearing rotor falling protection method

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Embodiment Construction

[0010] The invention relates to a method for protecting an active magnetic bearing rotor from falling. According to the detected state of the rotor, the magnetic bearing coil group can be controlled to be connected to the normal suspension branch or the drop protection branch, so as to realize the safe and stable operation of the rotor. It mainly includes: system power supply unit, position detection unit, control unit, normal suspension branch, drop protection branch and magnetic bearing coil group. The system power supply unit of the present invention includes filtering, rectifying and voltage conversion circuits, which provide corresponding stable DC voltages for the position detection unit, control unit, normal suspension branch and drop protection branch. The position detection unit of the present invention includes a distance sensor installed at two radial magnetic bearings to measure the position of the rotor in the two orthogonal directions x and y in the radial direct...

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Abstract

The invention discloses an active magnetic bearing rotor falling protection method, which is used for protecting a magnetic bearing and a rotor when the magnetic bearing rotor falls radially or axially. The whole system comprises a system power supply unit, a position detection unit, a control unit, a normal suspension branch, a drop protection branch and a magnetic bearing coil group. According to the method, when the control unit judges that radial or axial falling of the rotor occurs, normal suspension branch power supply of the magnetic bearing coil assembly is switched to falling protection branch power supply, and at the moment, all coils are directly connected to a reliable power supply, so that the rotor is quickly and stably adsorbed and fixed; and structural damage caused by repeated impact of the rotor on the magnetic bearing is avoided. The method is still effective when the driving circuit breaks down, and meanwhile, compared with redundancy protection of the driving circuit, the method is simpler and lower in cost.

Description

technical field [0001] The invention belongs to the technical field of magnetic suspension, and in particular relates to a method for protecting an active magnetic bearing rotor from falling, in particular to a method with a drop protection branch which is simpler than redundant protection, and is used to avoid damage to the rotor from radial and axial drops. Damage to magnetic bearings and rotors. Background technique [0002] Due to the characteristics of non-contact, non-lubricating and non-abrasive, active magnetic bearings have been widely used in many rotating equipment in engineering fields such as machinery, electric power, petroleum, aviation, and aerospace in recent years. [0003] In a system composed of an active magnetic bearing and a rotor, in order to ensure the safety and reliability of the system, the rotor will be equipped with a protective bearing. When the support of the magnetic bearing fails, the protective bearing will temporarily support the rotor, th...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0442F16C32/048F16C32/0446
Inventor 郑领博田希晖魏大忠陈玉龙
Owner 北京高孚动力科技有限公司
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