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An Electromagnetically Driven Liquid Metal Rheostat

A technology of liquid metal and electromagnetic drive, applied in the direction of liquid resistors, etc., can solve problems such as poor contact of conductive contacts, corrosion of travel switch casing, and increased operation complexity, and achieve low cost, difficult electrochemical corrosion, and stable properties.

Active Publication Date: 2015-12-09
BEIJING EMIKON TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid rheostat has the characteristics of simple structure and stepless variable resistance, but the liquid rheostat uses an aqueous solution of sodium carbonate or sodium chloride. On the one hand, due to the strong corrosiveness of the salt solution, the travel switch shell is often corroded and the conductive contacts are contacted. On the other hand, the salt solution is easy to boil and evaporate at high temperature, so the amount of salt solution needs to be increased to increase the heat capacity, resulting in a bulky equipment; and the salt solution is volatile at room temperature and needs to be continuously replenished, which increases the complexity of the operation

Method used

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  • An Electromagnetically Driven Liquid Metal Rheostat

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Embodiment 1

[0032] Embodiment 1 shows a typical application of the electromagnetically driven liquid metal varistor of the present invention. figure 1 Schematic diagram of the liquid metal varistor structure for electromagnetic actuation.

[0033] like figure 1 As shown, the electromagnetically driven liquid metal rheostat of this embodiment consists of a shell 1 , paraffin wax 2 , copper wire 3 , connector 4 , liquid metal 5 and electromagnetic pump 6 .

[0034] In this embodiment, the housing 1 is a cuboid with a size of 20cm×2cm×20cm, and the material is stainless steel.

[0035] Paraffin wax 2 fills the entire interior of the housing 1, and its melting point is 50°C.

[0036] The copper wire 3 has a diameter of 1 mm and a total length of 15 m, coiled into an S shape.

[0037] Connector 4 is made of polyethylene material and is U-shaped.

[0038] Liquid metal 5 is gallium indium tin zinc alloy (mass fraction: 61%Ga, 25%In, 13%Sn, 1%Zn), which is safe and non-toxic, with a melting p...

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Abstract

The invention relates to a solenoid-drive liquid metallic rheostat which is characterized by comprising a casing, paraffin, a copper wire, a communicating vessel, liquid metal and an electromagnetic pump. The casing is filled with the paraffin and the copper wire; the communicating vessel is located on one side of the casing and is connected with one end of the copper wire; the electromagnetic pump is mounted at the bottom of the communicating vessel; and the liquid metal is stored in the communicating vessel, moves up and down under the driving of the electromagnetic pump and is contacted with the copper wire at different height positions, so that the length of the copper wire placed in a circuit is hanged and the variable resistance effect is achieved. The solenoid-drive liquid metallic rheostat takes the copper wire as the main body, utilizes the electromagnetic pump to drive the liquid metal to move to adjust the copper wire resistance, and adopts the paraffin to absorb joule heat, so that the whole system is stable and reliable, small in size, light in weight and low in cost, and can be widely applied to the field of soft starting of motors.

Description

technical field [0001] The invention relates to an electromagnetically driven liquid metal rheostat. Copper wire is used as the main body of the rheostat, an electromagnetic pump is used to drive the liquid metal to move to adjust the resistance of the copper wire, and paraffin is used to absorb Joule heat. The liquid metal rheostat provided by the invention is stable, reliable, small in size, light in weight and low in cost, and can be widely used in the soft start of electric motors. Background technique [0002] Because of its simple structure, reliable operation, convenient maintenance, and low price, AC motors are widely used as the power of electric drive production machinery, and have a large number of applications in various industries. The motor is started directly under constant voltage, and its starting current is about 6-12 times of the rated current. Its speed needs to rise from zero to rated speed in a short time, which will produce an impact during the startin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C10/02
Inventor 郭瑞考笑梅
Owner BEIJING EMIKON TECH DEV
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