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Method for frequency-adding and demagnetization for relatively static object

A relatively static and demagnetizing technology, applied in the direction of magnetic objects, electrical components, circuits, etc., to achieve the effect of simple control, good demagnetization effect and high efficiency

Inactive Publication Date: 2008-12-17
陈乃明
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the optimal adjustment of two or more parameters requires more professional skills and facilities, and frequent adjustments make the fixed-frequency voltage attenuation demagnetization method unable to play a good role in production.

Method used

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  • Method for frequency-adding and demagnetization for relatively static object
  • Method for frequency-adding and demagnetization for relatively static object
  • Method for frequency-adding and demagnetization for relatively static object

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Embodiment Construction

[0009] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0010] Figure 1 ~ Figure 3 It shows that the method of the present invention is superior to the prior art and can be implemented. The main features of this type of demagnetization device are: the demagnetization device itself is required to generate a magnetic field with alternating polarity and direction, and its strength gradually decays to a minimum value, so that the magnetic field acts on itself and the adsorbed object, so as to realize the demagnetization of itself and the demagnetized object. demagnetization. The present invention is illustrated by taking the electromagnetic chuck of a grinding machine as an example. For the disk controller, the disk is an inductive load. Trends such as Figure 1 As shown: 1. The inductor current cannot change suddenly. 2. As time increases, the inductor current tends to be stable from small to large. Finally, the current v...

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Abstract

The invention discloses a method for performing frequency boosting and demagnetization to the relative static object. The key technology of the method lies in that a electromagnetic conversion device with inductance property and then a relative static object are provided; the method controls the current flowing through an electromagnetic conversion and demagnetization device by changing the time for applying voltage; the magnitude of the applied voltage is invariable during the process of a complete demagnetization, and the voltage polarities are alternately changed; the time for each applied polarity voltage is gradually reduced from long to short, and the frequency is gradually increased from low to high; as the frequency increases, the current of the electromagnetic conversion and demagnetization device is correspondingly reduced, thereby the electromagnetic conversion and demagnetization device generates the alternating magnetic field from strong to weak; under the action of the magnetic field, the electromagnetic conversion and demagnetization device as well as the static object to be demagnetized is demagnetized, and the method has the advantages of simple control, high efficiency and good and stable demagnetization effect: the identical demagnetization effect can be realized in a shorter time.

Description

technical field [0001] The invention relates to the demagnetization and self-demagnetization of a relatively static object by an electromagnetic conversion device with inductance characteristics, specifically a method for demagnetizing a relatively static object by increasing the frequency. Background technique [0002] In the past, when demagnetizing the disk and the workpiece adsorbed on the disk, the fixed frequency voltage attenuation method was used. The fixed frequency voltage attenuation method controls the current and direction of the current flowing through the disk through an alternating voltage with a constant frequency and gradually decaying; due to the inductive current It cannot be changed suddenly. Under the condition of constant voltage, the demagnetization frequency determines the size of the current. Too high frequency will cause the demagnetization current to be too small and cannot generate a magnetic field of sufficient strength. Under the same voltage de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F13/00
Inventor 陈乃明
Owner 陈乃明
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