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An Experimental Method for Studying the Magnetization Law of Nonlinear Permanent Magnets

An experimental method, permanent magnet technology, applied in teaching models, instruments, educational appliances, etc.

Active Publication Date: 2021-02-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no perfect test scheme for the magnetization law of nonlinear permanent magnets to judge the running track of the operating point of the permanent magnet under various conditions of applying different currents.

Method used

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  • An Experimental Method for Studying the Magnetization Law of Nonlinear Permanent Magnets
  • An Experimental Method for Studying the Magnetization Law of Nonlinear Permanent Magnets
  • An Experimental Method for Studying the Magnetization Law of Nonlinear Permanent Magnets

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Embodiment Construction

[0036] This embodiment provides an experimental method for studying the magnetization law of a nonlinear permanent magnet, such as figure 1 As shown, the experimental system implementing the method of this embodiment consists of a magnetization device, a measurement module, a control module and a power supply, such as figure 2 and image 3 As shown, the control module outputs a pulse width modulation wave from the field programmable gate array circuit board, and controls the on-off of the high-power triode in the H bridge through the pulse width modulation wave, and then controls the voltage applied to the coil, and finally achieves changing the current passing through the coil Amplitude purpose.

[0037]When currents of the same magnitude are applied to the coils, the operating points of the permanent magnets follow exactly the same trajectory. In practical applications, based on the consideration of energy saving, it is generally only necessary to apply a pulse current to...

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Abstract

The invention discloses an experimental method for studying the magnetization law of a nonlinear permanent magnet. The method includes: (1) applying a continuous current greater than a first preset threshold to the charging and demagnetizing coil of the nonlinear permanent magnet to obtain the permanent magnet's During the charge and demagnetization process, the working point passes through the movement track and change law of the return line and the hysteresis loop; (2) applying a continuous and continuously changing electric current less than the second preset threshold value to the charge and demagnetization coil of the nonlinear permanent magnet (3) Apply pulse current to the charge and demagnetization coil of the nonlinear permanent magnet to verify the magnetization obtained from the continuous current experiment of steps (1) and (2) The applicability of the rules in practical application scenarios. The invention can obtain the complete magnetization law of the nonlinear permanent magnet.

Description

technical field [0001] The invention relates to the field of nonlinear permanent magnets of permanent magnet motors, in particular to an experimental method for studying the magnetization law of nonlinear permanent magnets. Background technique [0002] The equipment using permanent magnets to establish a magnetic field has the advantages of simple structure, high efficiency and reliable operation compared with the equipment establishing a magnetic field through electric excitation. Therefore, permanent magnets are widely used in various instruments and equipment. The non-adjustable magnetization state is a major feature of traditional permanent magnets. Although this feature makes traditional permanent magnets more reliable, it also makes the use of traditional permanent magnets inflexible. Traditional permanent magnets cannot be used where the required magnetization state needs to be selected according to operating conditions. In recent years, the rapid development of rar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/18
CPCG09B23/181
Inventor 阳辉王明晖揭宇飞郭轩江李锦达
Owner SOUTHEAST UNIV