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Electromagnetic field system for magnetic refrigerator

A magnetic refrigerator and electromagnetic field technology, applied in the field of electromagnetic field systems, can solve problems such as no system, and achieve the effects of small rise time, convenient magnetic response characteristics, and reduced diameter size

Pending Publication Date: 2018-10-26
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no such system at present, which is the original intention and purpose of the present invention

Method used

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  • Electromagnetic field system for magnetic refrigerator
  • Electromagnetic field system for magnetic refrigerator
  • Electromagnetic field system for magnetic refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The electromagnetic coil 1 adopts a parallel winding of 28 strands, and each wire adopts a wire diameter of 1 mm. The entire electromagnetic coil 1 can be equivalent to a series resistance and inductance. The formula calculation can get the resistance value of the entire coil as 0.518Ω and the inductance as 0.164H. The power supply 4 adopts the aforementioned method one, namely the transformer solution. Such as figure 2 As shown, the industrial electricity is boosted by the transformer 9 and then output a maximum DC voltage of 800V through the rectifier filter device 10. The first IGBT 12 and the fourth IGBT 15 in the drive circuit are turned on to form a bridge circuit, and the electromagnetic coil 1 is powered on. 1 When the current reaches the required value, the PWM chopping process is used to maintain a stable current; the first IGBT 12 and the fourth IGBT 15 in the driving circuit are turned off, and the second IGBT 13 and the third IGBT 14 are turned on to form a...

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PUM

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Abstract

The invention discloses an electromagnetic field system for a magnetic refrigerator. The system comprises an electromagnetic coil, an L-shaped iron core, a column iron core, a power supply and a mounting rack, wherein the electromagnetic coil, the L-shaped iron core and the column iron core are mounted on the mounting rack; the L-shaped iron core and the column iron core are matched to form a C-shaped iron core, the electromagnetic coil winds one side of the C-shaped iron core, the electromagnetic coil is electrified to generate a magnetic field, and the magnetic field magnetizes the C-shapediron core; the power supply is connected to a wiring terminal of the electromagnetic coil to output a direct voltage; and an air gap is formed between the L-shaped iron core and the column iron core,the width of the air gap can be adjusted, and an active magnetic heat regenerator in the magnetic refrigerator is mounted in the air gap. The system disclosed by the invention can provide the periodically stable magnetic field to a magnetic working medium and the magnetic response characteristic can be adjusted conveniently.

Description

Technical field [0001] The invention relates to the technical field of magnetic refrigeration, and in particular to an electromagnetic field system for a magnetic refrigeration machine. Background technique [0002] Magnetic refrigeration is based on the magnetocaloric effect of solid magnetic materials as the refrigeration principle and is a refrigeration technology with development prospects. In the conventional magnetic refrigerator design, the magnetic field is provided by permanent magnets. Once the permanent magnets are manufactured and assembled, their magnetic response characteristics are fixed and cannot be changed. The system's fluid, heat exchange and magnetic response process matching and coordination are debugged and optimized Subject to great restrictions. Unlike permanent magnets, the response characteristics of the electromagnetic field can be flexibly adjusted in a wide range according to requirements (such as rise and fall time, platform time and frequency), wh...

Claims

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Application Information

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IPC IPC(8): F25B21/00
CPCF25B21/00Y02B30/00
Inventor 邹君鼎黄鑫锋徐超
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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