Method for implementing low power consumption suspension of five-freedom degree magnetic suspension system axial magnetic bearing

An axial magnetic bearing and magnetic suspension technology, applied in the direction of shaft and bearing, bearing, mechanical equipment, etc., can solve the problem of excessive displacement deviation error signal, and achieve the effect of low power consumption and easy realization

Inactive Publication Date: 2009-05-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0007] For the five-degree-of-freedom magnetic levitation system that adopts the above-mentioned hybrid magnetic levitation bearing in the axial direction, in the block diagram of the axial degree of freedom PID control (that is, the block diagram of the feedback system composed of the PID regul...

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  • Method for implementing low power consumption suspension of five-freedom degree magnetic suspension system axial magnetic bearing
  • Method for implementing low power consumption suspension of five-freedom degree magnetic suspension system axial magnetic bearing
  • Method for implementing low power consumption suspension of five-freedom degree magnetic suspension system axial magnetic bearing

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Embodiment Construction

[0022] Permanent magnet bias axial magnetic bearing control coil control circuit part such as figure 1 As shown, including signal conditioning circuit, power circuit and controller. The signal conditioning circuit converts the axial displacement signal of the rotor into a voltage signal that the controller can receive. The power circuit supplies current to the axial control coil of the permanent magnet bias axial magnetic bearing. The controller receives the axial position signal and uses The low-power displacement compensation algorithm generates corresponding control signals to control the power circuit.

[0023] The permanent magnet bias axial magnetic bearing control coil realizes axial low power consumption levitation. The realization method is as follows: figure 2 As shown, the low-power magnetic bearing axial degree of freedom negative feedback closed-loop control system includes the suspension position of the given rotor in the controller, that is, the reference posi...

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Abstract

The invention discloses a method for realizing low power consumption suspension of an axial magnetic bearing, which comprises the following steps: (1) superposing a feedback displacement signal x of a rotor, a given reference position sr and a displacement compensating signal rn to obtain an error signal e; (2) adding the error signal e into a PID adjuster to obtain control current im; (3) amplifying the control current im and inputting the control current im to a permanent magnet biased magnetic bearing; (4) at the same time, adding the im as a feedback signal, a displacement compensating signal ro at the previous moment and a displacement compensating signal roo at the more previous moment output by a two-level storage unit into a low power consumption displacement compensating module to obtain a displacement compensating signal rn; and (5) stacking the rn, the sr and the x to generate the error signal e after the rn is obtained,; at the same time, putting the rn into the storage unit as the ro of the next moment, and putting the ro into the storage unit of next level as the roo of the next moment. Therefore, the whole control flow is circularly operated. The control current in an axial control coil reaches to be minimum, and the method realizes low power consumption.

Description

technical field [0001] The invention relates to a method for realizing low-power levitation of an axial magnetic bearing of a five-degree-of-freedom magnetic suspension system, which belongs to a method for controlling a five-degree-of-freedom magnetic suspension bearing system. Background technique [0002] At present, the five-degree-of-freedom magnetic suspension bearing system adopts two radial magnetic suspension bearings plus an axial magnetic suspension bearing or an axial-radial magnetic suspension bearing plus a radial magnetic suspension bearing structure, providing an axial and four radial magnetic suspension force, so that the rotor can be stably suspended in the equilibrium position when it is running in suspension. [0003] Magnetic suspension bearings can be divided into three types: active type, passive type and hybrid type according to the way the magnetic field is established. [0004] The active magnetic suspension bearing establishes a bias magnetic fiel...

Claims

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Application Information

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IPC IPC(8): F16C32/04
CPCF16C32/0444F16C32/0476
Inventor 王晓刚邓智泉赵旭升梅磊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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