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Suspending magnetic stagnant compensation method

A compensation method and magnetic levitation technology, applied in the direction of the magnetic attraction or thrust holding device, electrical components, etc., can solve the problems of asynchronous magnetization and demagnetization, the inability to ensure that the suspended object returns to the equilibrium position, and incompatibility, etc.

Inactive Publication Date: 2010-05-19
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the disadvantages in the prior art that the magnetization and demagnetization generated by the above-mentioned differential electromagnets are not synchronized and unequal, it is impossible to ensure that the suspended matter returns to the equilibrium position, which increases the difficulty of control and reduces the stability of the magnetic levitation. The present invention The purpose of this paper is to provide a compensation method for magnetic levitation hysteresis, which is simple and convenient, and can enhance the stability of the magnetic levitation system

Method used

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  • Suspending magnetic stagnant compensation method
  • Suspending magnetic stagnant compensation method
  • Suspending magnetic stagnant compensation method

Examples

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Embodiment 1

[0044] A method of weighting the control signal that needs to be demagnetized is adopted, that is, a software method.

[0045] Please combine image 3 , Figure 4 As shown, when the suspended object 1 deviates from its original equilibrium position under external disturbance, the sensors 3a and 3b are used to measure the deviation, and then the controller 5 is used to generate a differential control signal (u 0 +Δu) and (u 0 -Δu), from which it is judged that the control signal to be demagnetized is (u 0 -Δu), for the control signal (u 0 -Δu) is weighted and multiplied by a weighting factor k to obtain (u 0 -kΔu), use the power amplifier 4a to convert the control signal (u 0 +Δu) is converted into the excitation current of the coil 6a (I 0 +Δi), use the power amplifier 4b to transfer the control signal (u 0 -kΔu) is converted into the excitation current of the coil 6b (I 0 -kΔi), please recombine Figure 5 As shown, since the increase Δi of the magnetic induction intensity of the di...

Embodiment 2

[0047] The method of increasing the compensation current by increasing the compensation coil and the corresponding compensation power amplifier is the hardware method.

[0048] Please combine Image 6 , Figure 7 As shown, a compensation coil 7a and a compensation power amplifier 4c corresponding to the compensation coil 7a are added to the differential electromagnet 2a; a compensation coil 7b and a compensation power amplifier corresponding to the compensation coil 7b are also added to the differential electromagnet 2b 4d. When the suspended object 1 deviates from the original equilibrium position under external disturbance, the sensors 3a and 3b are used to measure the deviation, and then the controller 5 is used to generate a differential control signal (u 0 +Δu) and (u 0 -Δu), from which it is judged that the control signal to be demagnetized is (u 0 -Δu), using power amplifiers 4a and 4b to separate the control signal (u 0 +Δu) and (u 0 -Δu) is converted into the excitation c...

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Abstract

The invention discloses a compensation method for magnetic suspension hysteresis, comprising the following steps of: using a sensor to measure offset; using a controller to generate a differential control signal, and judging a demagnetization control signal; processing weighing treatment for the demagnetization control signal; using a power amplifier to generate excitation current of generating magnetization and demagnetization respectively; wherein, the excitation current enables the increasing amount equal to the decreasing amount of magnetic strength generated by the differential electromagnet; or making the increasing amount equal to the decreasing amount of a magnetic strength generated by the differential electromagnet by increasing the compensation current for increasing compensation coil and corresponding compensation power amplifier. The invention compensates magnetic hysteresis. The invention is simple and convenient, stable and reliable. The invention makes the increasing amount equal to the decreasing amount of magnetic strength generated by the differential electromagnet. The invention carbonizes and equalizes magnetization and demagnetization. The invention guaranteesthe suspended matter restore to balancing position, so as to improve stability of the magnetic suspension system.

Description

Technical field [0001] The invention relates to electromagnetic force control of magnetic suspension, and more specifically, to a method for compensating magnetic suspension hysteresis. Background technique [0002] The working principle of magnetic bearing and electromagnetic strip stabilization system is basically the same, please refer to figure 1 As shown, the suspended object 1 will deviate from its original equilibrium position under external disturbance. The deviation is measured by sensors 3a and 3b, and the controller 5 generates a differential control signal (u 0 +Δu) and (u 0 -Δu), the power amplifiers 4a and 4b convert the control signal into the excitation current of the coils 6a and 6b (I 0 +Δi) and (I 0 -Δi), the excitation current causes the electromagnets 2a and 2b to generate a differential magnetic field, and the suspended object 1 is directed to the equilibrium position under the combined force of the magnetic field in the differential magnetic field, so that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N15/00
Inventor 陈培林徐龙祥王泽济金超武张永杰
Owner BAOSHAN IRON & STEEL CO LTD