CN107479011A - High/low temperature sound state soft magnetic characteristic measuring system - Google Patents
High/low temperature sound state soft magnetic characteristic measuring system Download PDFInfo
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- CN107479011A CN107479011A CN201710600862.1A CN201710600862A CN107479011A CN 107479011 A CN107479011 A CN 107479011A CN 201710600862 A CN201710600862 A CN 201710600862A CN 107479011 A CN107479011 A CN 107479011A
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- 238000005259 measurement Methods 0.000 claims abstract description 40
- 230000005284 excitation Effects 0.000 claims abstract description 31
- 230000003068 static effect Effects 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000000696 magnetic material Substances 0.000 claims description 21
- 239000011261 inert gas Substances 0.000 claims description 6
- 230000005389 magnetism Effects 0.000 abstract 4
- 238000012360 testing method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/14—Measuring or plotting hysteresis curves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1223—Measuring permeability, i.e. permeameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/123—Measuring loss due to hysteresis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/16—Measuring susceptibility
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- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention, which provides a kind of high/low temperature sound state soft magnetic characteristic measuring system provided by the invention, includes soft magnetism direct-current measuring device, soft magnetism alternating-current measuring device, function translator, high temperature furnace and low temperature oven；Standard ring is suspended in high temperature furnace or low temperature oven, and magnetizing coil and measuring coil are wound with standard ring, and the both ends of magnetizing coil and the both ends of measuring coil are respectively connected to soft magnetism direct-current measuring device and soft magnetism alternating-current measuring device；It is provided with high temperature furnace and turns to hollow heating coil, heating coil is electrically connected with by wire and high temperature furnace switch board；Low temperature filling is provided with low temperature oven, liquid nitrogen has been filled with low temperature filling, resistance wire is wound with the outer wall that low temperature fills, resistance wire is electrically connected with by wire and low temperature oven switch board；Function translator is used to switch high temperature furnace and low temperature oven, DC excitation power and ac excitation power supply.The present invention can realize the low temperature to standard ring, high temperature, dynamic, the measurement of static soft magnet performance.
Description
Technical Field
The invention relates to the technical field of soft magnetic material measurement, in particular to a high-low temperature dynamic and static soft magnetic characteristic measurement system.
Background
With the rapid development of aerospace industry in China, the performance requirements on materials are higher and higher, especially the requirements on magnetic materials used in aerospace precise control systems are also stricter, especially the rule that the magnetic characteristic index of a soft magnetic material applied in a certain temperature environment changes along with the temperature is known in advance, so that a designer can ensure the precise control of an aerospace vehicle only by considering the influence factors of the environmental temperature on the magnetic performance of the soft magnetic material, and the reliable operation of the aerospace vehicle is ensured. The adopted measuring method is required to meet the requirements of national standard soft magnetic materials: the standard of the measuring method of the direct-current magnetic performance of the national standard GBT13012-2008_ soft magnetic material and the standard of the measuring method of the annular sample of the alternating-current magnetic performance of the national standard GBT 3658 + 2008 soft magnetic material realize the normal-temperature accurate measurement of the characteristic parameters of the magnetic performance of the soft magnetic material, and simultaneously require the accurate measurement of the soft magnetic material applied in the low-temperature and high-temperature environments at high temperature and low temperature.
At present, two types of soft magnetic materials are generally measured, namely an impact measurement method and a vibration magnetometer measurement method. Impact measurement method: at present, an MATS-2010SD soft magnetic direct current measuring device (containing a direct current excitation power supply) and an MATS-2010SA soft magnetic alternating current measuring device (containing an alternating current excitation power supply) are generally adopted, the two measuring devices need to make a soft magnetic material into a standard ring, the device is low in price, can reflect the overall performance of the soft magnetic material, is accurate in test, but can only independently measure at normal temperature at present and cannot measure at low temperature and high temperature. Vibration sample measurement method: the international American Quantum Design company and the British Cryogenic company both adopt vibration magnetometer measurement methods, instruments comprise a comprehensive physical property measurement system and a magnetic measurement system produced by the American Quantum Design company and some domestic instruments, although high-temperature and low-temperature measurement can be carried out, the mass of a sample tested by the instruments is as small as microgram measurement, only destructive sampling can be carried out on a material, the magnetic property of the material in a certain micro region is characterized, the integral magnetic property of the material cannot be reflected, the instrument is suitable for material research and is not suitable for magnetic measurement of material production, meanwhile, the instrument is expensive and complex to operate, the requirement on operators is high during measurement, special operation is required, liquid helium cooling is required, and consumables are expensive. Therefore, at present, for the soft magnetic material used in the high temperature and low temperature environment, it is urgently needed to find a measuring system which has low price, simple operation, and can represent the high temperature magnetic performance and the low temperature magnetic performance of the whole soft magnetic material.
Disclosure of Invention
In view of the above problems, the present invention provides a high and low temperature dynamic and static soft magnetic characteristic measurement system to solve the problems that the existing test device is expensive and destroys the sampling or cannot perform high and low temperature test on the soft magnetic material.
The invention provides a high-low temperature dynamic and static soft magnetic characteristic measuring system, which is used for measuring the magnetic performance of a standard ring made of soft magnetic materials, and comprises: the soft magnetic direct current measuring device and the soft magnetic alternating current measuring device respectively comprise a magnetizing coil interface and a measuring coil interface, the soft magnetic direct current measuring device further comprises a direct current excitation power supply, the soft magnetic alternating current measuring device further comprises an alternating current excitation power supply, and the high-low temperature dynamic and static soft magnetic characteristic measuring system further comprises a function converter, a high-temperature furnace and a low-temperature furnace; the device comprises a standard ring, a magnetizing coil, a measuring coil, a soft magnetic direct current measuring device, a soft magnetic alternating current measuring device, a high temperature furnace or a low temperature furnace, wherein the standard ring is suspended in the high temperature furnace or the low temperature furnace, the magnetizing coil and the measuring coil are wound on the standard ring, two ends of the magnetizing coil are respectively connected to a magnetizing coil interface of the soft magnetic direct current measuring device and a magnetizing coil interface of the soft magnetic alternating current measuring device; an accommodating groove is formed in the high-temperature furnace, a heating coil wound into a hollow shape is arranged in the accommodating groove, and the heating coil is electrically connected with a high-temperature furnace control cabinet through a lead; the low-temperature furnace control cabinet is characterized in that a containing tank is arranged in the low-temperature furnace, a low-temperature tank is arranged in the containing tank, liquid nitrogen is filled in the low-temperature tank, a resistance wire is wound on the outer wall of the low-temperature tank, and the resistance wire is electrically connected with the low-temperature furnace control cabinet through a lead; the function converter comprises a first selection relay and a second selection relay, the first selection relay comprises a first fixed contact, a second fixed contact and a first moving contact lapped with the first fixed contact or the second fixed contact, and the second selection relay comprises a third fixed contact, a fourth fixed contact and a second moving contact lapped with the third fixed contact or the fourth fixed contact; the first static contact is connected with a power supply of a low-temperature furnace control cabinet, the second static contact is connected with the power supply of a high-temperature furnace control cabinet, the third static contact is connected with a soft magnetic direct current measuring device, and the fourth static contact is connected with a soft magnetic alternating current measuring device; when the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the third fixed contact, the low-temperature furnace control cabinet is switched on, the measuring coil is connected to the soft magnetic direct current measuring device, and the magnetizing coil is connected to the direct current excitation power supply; when the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the fourth fixed contact, the low-temperature furnace control cabinet is switched on, the measuring coil is connected with the soft magnetic alternating current measuring device, and the magnetizing coil is connected with the alternating current excitation power supply; when the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the third fixed contact, the high-temperature furnace control cabinet is switched on, the measuring coil is connected with the soft magnetic direct current measuring device, and the magnetizing coil is connected with the direct current excitation power supply; when the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the fourth fixed contact, the high-temperature furnace control cabinet is switched on, the measuring coil is connected with the soft magnetic alternating current measuring device, and the magnetizing coil is connected with the alternating current excitation power supply; and when the measuring coil is connected to the soft magnetic direct current measuring device, the ratio of the outer diameter to the inner diameter of the standard ring is less than or equal to 1.4; when the measuring coil is connected to the soft magnetic AC measuring device, the ratio of the outer diameter to the inner diameter of the standard ring is less than or equal to 1.1.
Compared with the prior art, the high-low temperature dynamic and static soft magnetic characteristic measuring system provided by the invention can obtain the following technical effects:
1. a high-low temperature test environment is built through a high-temperature furnace and a low-temperature furnace, so that high-low temperature test of the soft magnetic material is realized;
2. the high-temperature furnace and the low-temperature furnace, direct current and alternating current are freely switched through the function converter, so that the low-temperature, high-temperature, dynamic and static soft magnetic performance measurement of the soft magnetic material is met;
3. the measuring system has low cost and simple operation, and is convenient for non-magnetic material professionals to use.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of a logic structure of a high-low temperature dynamic and static soft magnetic characteristic measurement system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a low temperature furnace according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a high temperature furnace according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a functional converter according to an embodiment of the present invention.
The reference numerals in the figures include: the device comprises a low-temperature furnace 1, a low-temperature tank 11, a resistance wire 12, a standard ring 13, a temperature measuring pipe 14, a low-temperature furnace control cabinet 15, a high-temperature furnace 2, a heating coil 21, a high-temperature furnace control cabinet 22, a standard ring 23, a temperature measuring pipe 24, an air inlet valve 25, an air outlet valve 26, an air storage tank 27, a vacuum pump 28, a function converter 3, a first selection relay 31, a second selection relay 32, a soft magnetic alternating current measuring device 4, a soft magnetic direct current measuring device 5, a computer 6 and a printer 7.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The high-low temperature dynamic and static soft magnetic characteristic measurement system provided by the invention is used for measuring the magnetic performance of a standard ring made of soft magnetic materials, the standard ring meets the requirements of national standard GB/T3657-1983, the magnetic performance measurement comprises high temperature, low temperature, alternating current and direct current measurement, and the high temperature measurement refers to the measurement of magnetic characteristic parameters such as a magnetization curve, a hysteresis loop, loss, magnetic conductivity, saturation magnetic induction intensity, coercive force and the like of the standard ring at any temperature of 25-500 ℃; the low-temperature measurement refers to the measurement of magnetic characteristic parameters such as a magnetization curve, a magnetic hysteresis loop, loss, magnetic permeability, saturation, magnetic induction intensity, coercive force and the like of a standard ring at any temperature of-196-25 ℃; the alternating current measurement is dynamic measurement of an index ring; the dc measurement is a static measurement of the reference ring.
Fig. 1 shows a logical structure of a high and low temperature dynamic and static soft magnetic property measurement system according to an embodiment of the present invention.
As shown in fig. 1, the high and low temperature dynamic and static soft magnetic characteristic measuring system includes: a low-temperature furnace 1, a high-temperature furnace 2, a function converter 3, a soft magnetic alternating current measuring device 4 and a soft magnetic direct current measuring device 5, wherein the soft magnetic alternating current measuring device 4 is an MATS-2010SA soft magnetic alternating current measuring device, used for dynamically measuring the standard ring, the soft magnetic direct current measuring device 5 is an MATS-2010SD soft magnetic direct current measuring device, the MATS-2010SD soft magnetic direct current measuring device and the MATS-2010SA soft magnetic alternating current measuring device both comprise magnetizing coil interfaces and measuring coil interfaces, the MATS-2010SD soft magnetic direct current measuring device further comprises a direct current excitation power supply, the MATS-2010SA soft magnetic alternating current measuring device further comprises an alternating current excitation power supply, the direct current excitation power supply is used for providing direct current for the MATS-2010SD soft magnetic direct current measuring device, and the alternating current excitation power supply is used for providing alternating current for the MATS-2010SA soft magnetic alternating current measuring device. The MATS-2010SD soft magnetic direct current measuring device and the MATS-2010SA soft magnetic alternating current measuring device are the prior art, and other structures of the devices are not described in detail in the invention.
The high-low temperature dynamic and static soft magnetic characteristic measuring system further comprises a computer 6 and a printer 7, the printer 7 is connected with the computer 6, the computer 6 is used for carrying out data processing on the test result of the standard ring, and the printer 7 is used for printing the test result of the standard ring.
A magnetizing coil and a measuring coil are wound on the standard ring, two ends of the magnetizing coil are respectively connected to a magnetizing coil interface of an MATS-2010SD soft magnetic direct current measuring device or a magnetizing coil interface of an MATS-2010SA soft magnetic alternating current measuring device, the magnetizing coil magnetizes the standard ring after being connected to a direct current excitation power supply, two ends of the measuring coil are respectively connected to a measuring coil interface of a soft magnetic direct current measuring device 5 or a measuring coil interface of a soft magnetic alternating current measuring device 4, and magnetic performance corresponding to the standard ring is measured.
The function converter 3 is used for switching a direct-current excitation power supply or an alternating-current excitation power supply, so that the magnetizing coils in the low-temperature furnace 1 and the high-temperature furnace 2 can be connected with the direct-current excitation power supply or the alternating-current excitation power supply, when the magnetizing coils are connected with the direct-current excitation power supply, the measuring coils perform direct-current measurement on the standard ring, and when the magnetizing coils are connected with the alternating-current excitation power supply, the measuring coils perform alternating-current measurement on the standard ring.
When the standard ring is subjected to alternating current measurement, the ratio of the outer diameter to the inner diameter of the standard ring satisfies the following formula:
D≤1.4d (1)
in formula (1), D represents the outer diameter of the standard ring in meters, and D represents the inner diameter of the standard ring in meters.
For convenience of description, the standard ring on which the ac measurement is made is referred to as a dynamic ring, preferably having a ratio of outer diameter to inner diameter of less than 1.25.
When the standard ring is subjected to direct current measurement, the ratio of the outer diameter to the inner diameter of the standard ring satisfies the following formula:
D≤1.1d (2)
in formula (2), D represents the outer diameter of the standard ring in meters, and D represents the inner diameter of the standard ring in meters.
The above formula (1) and formula (2) are the requirements of the national standard GB/T3657-1983 of the standard ring.
For convenience, the standard loop in which the dc measurement is made is referred to as the static loop.
The reason why the standard ring is suspended in the low-temperature furnace 1 or the high-temperature furnace 2 and the standard ring cannot be suspended in the high-temperature furnace 2 and the low-temperature furnace 1 at the same time is that the MATS-2010SD soft magnetic direct current measuring device and the MATS-2010SA soft magnetic alternating current measuring device respectively only have one magnetizing coil interface and one measuring coil interface, therefore, the MATS-2010SD soft magnetic direct current measuring device or MATS-2010SA soft magnetic alternating current measuring device can only measure one standard ring, and the present invention can only measure the standard ring according to the sequence of first measuring low temperature and then measuring high temperature or first measuring high temperature and then measuring low temperature, specifically, taking the example of measuring the low temperature first and then the high temperature, the standard ring (dynamic ring or static ring) is first put into the low temperature furnace for low temperature direct current measurement or low temperature alternating current measurement, and then the standard ring (dynamic ring or static ring) is taken out from the low temperature furnace and put into the high temperature furnace, and the standard ring is subjected to high temperature direct current measurement or high temperature alternating current measurement.
Fig. 2 is a structure of a low temperature furnace according to an embodiment of the present invention.
As shown in fig. 2, a holding tank is arranged in a low-temperature furnace 1, a low-temperature tank 11 is arranged in the holding tank, liquid nitrogen is filled in the low-temperature tank 11, the liquid nitrogen can reduce the temperature in the low-temperature tank 11 and provide a low-temperature environment for the low-temperature tank 11, a resistance wire 12 is wound on the outer wall of the low-temperature tank 11, the resistance wire 12 is electrically connected with a control cabinet 15 of the low-temperature furnace through a lead, and a standard ring 13 is hung in the low-temperature tank 11; after the low-temperature furnace control cabinet 15 supplies electricity to the resistance wire 12, the resistance wire 12 heats the low-temperature tank 11, so that the temperature in the low-temperature tank 11 is adjusted, and the measurement temperature of the standard ring 13 is changed.
In order to measure the temperature in the low-temperature tank 11 conveniently, the temperature in the low-temperature tank 11 is measured through a temperature measuring pipe 14, one end of the temperature measuring pipe 14 extends into the low-temperature tank 11, the other end of the temperature measuring pipe is connected with a low-temperature furnace control cabinet 15, and the temperature measured by the temperature measuring pipe 14 is displayed through the low-temperature furnace control cabinet 15.
Fig. 3 shows a structure of a high temperature furnace according to an embodiment of the present invention.
As shown in fig. 3, an accommodating groove is formed in the high-temperature furnace 2, a heating coil 21 wound into a hollow shape is arranged in the accommodating groove, and the heating coil 21 is electrically connected with a high-temperature furnace control cabinet 22 through a lead; a standard ring 23 is hung in a hollow position of the heating coil 21, and when the high temperature furnace control cabinet 22 supplies power to the heating coil 21, the heating coil 21 heats the standard ring 23.
In order to measure the temperature in the high-temperature furnace 2 conveniently, the temperature in the high-temperature furnace 2 is measured through the temperature measuring pipe 24, one end of the temperature measuring pipe 24 extends into the high-temperature furnace 2, the other end of the temperature measuring pipe is connected with the high-temperature furnace control cabinet 22, and the temperature measured by the temperature measuring pipe 24 is displayed through the high-temperature furnace control cabinet 22.
In order to prevent the standard ring 23 from being oxidized in the high temperature furnace 2, the high temperature furnace 2 needs to be vacuumized or filled with inert gas, therefore, an air inlet valve 25 and an air outlet valve 26 are arranged on the high temperature furnace 2, the air inlet valve 25 is communicated with an air storage tank 27 through an air pipe, the inert gas is filled in the air storage tank 27, the air outlet valve 26 is communicated with a vacuum pump 28 through a connecting pipeline, the air outlet valve 26 is opened firstly, the air in the high temperature furnace 2 is pumped away through the vacuum pump 28, then the air inlet valve is opened, and the inert gas in the air storage tank 27 is pumped into the high temperature furnace 2 when the air inlet valve 25 is opened because the pressure in the high temperature furnace 2 is higher than the external. Since the vacuum pump 28 cannot completely evacuate the air in the high temperature furnace 2, the inert gas is introduced into the high temperature furnace 2, and the inert gas can prevent the standard ring 23 from being oxidized under a high temperature condition.
Fig. 4 shows a structure of a functional converter according to an embodiment of the present invention.
As shown in fig. 4, the function converter includes a first selection relay 31 and a second selection relay 32, the first selection relay 31 includes a first fixed contact, a second fixed contact and a first movable contact, the first movable contact is overlapped with the first fixed contact or the second fixed contact, the first fixed contact is connected with the power supply of the low temperature furnace control cabinet 15, and the second fixed contact is connected with the power supply of the high temperature furnace control cabinet 22; the second selection relay 32 includes a third fixed contact, a fourth fixed contact and a second movable contact, the second movable contact is overlapped with the third fixed contact or the fourth fixed contact, the third fixed contact is connected with the soft magnetic direct current measuring device 5, and the fourth fixed contact is connected with the soft magnetic alternating current measuring device 4.
When the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the third fixed contact, the power supply of the low-temperature furnace control cabinet 15 is switched on, the measuring coil is connected to the soft magnetic direct current measuring device 5, and the magnetizing coil is connected to the direct current excitation power supply, so that the low-temperature static measurement is carried out on the standard ring through the measuring coil.
When the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the fourth fixed contact, the power supply of the low-temperature furnace control cabinet 15 is switched on, the measuring coil is connected to the soft magnetic alternating current measuring device 4, and the magnetizing coil is connected to the alternating current excitation power supply, so that the low-temperature dynamic measurement is carried out on the standard ring through the measuring coil.
When the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the third fixed contact, the power supply of the high-temperature furnace control cabinet 22 is switched on, the measuring coil is connected to the soft magnetic direct current measuring device 5, and the magnetizing coil is connected to the direct current excitation power supply, so that the high-temperature static measurement is carried out on the standard ring through the measuring coil.
When the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the fourth fixed contact, the power supply of the high-temperature furnace control cabinet 22 is switched on, the measuring coil is connected to the soft magnetic alternating current measuring device 4, and the magnetizing coil is connected to the alternating current excitation power supply, so that the high-temperature dynamic measurement is carried out on the standard ring through the measuring coil.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A high and low temperature dynamic and static soft magnetic characteristic measurement system for measuring soft magnetic performance of a standard ring made of a soft magnetic material, the high and low temperature dynamic and static soft magnetic characteristic measurement system comprising: the soft magnetic direct current measuring device and the soft magnetic alternating current measuring device respectively comprise a magnetizing coil interface and a measuring coil interface, the soft magnetic direct current measuring device further comprises a direct current excitation power supply, the soft magnetic alternating current measuring device further comprises an alternating current excitation power supply, and the high and low temperature dynamic and static soft magnetic characteristic measuring system is characterized by further comprising a function converter, a high temperature furnace and a low temperature furnace; wherein,
the standard ring is hung in the high-temperature furnace or the low-temperature furnace, a magnetizing coil and a measuring coil are wound on the standard ring, two ends of the magnetizing coil are respectively connected with a magnetizing coil interface of the soft magnetic direct current measuring device and a magnetizing coil interface of the soft magnetic alternating current measuring device, and two ends of the measuring coil are respectively connected with a measuring coil interface of the soft magnetic direct current measuring device and a measuring coil interface of the soft magnetic alternating current measuring device;
an accommodating groove is formed in the high-temperature furnace, a heating coil wound into a hollow shape is arranged in the accommodating groove, and the heating coil is electrically connected with a high-temperature furnace control cabinet through a lead;
the low-temperature furnace control cabinet is characterized in that a containing tank is arranged in the low-temperature furnace, a low-temperature tank is arranged in the containing tank, liquid nitrogen is filled in the low-temperature tank, a resistance wire is wound on the outer wall of the low-temperature tank, and the resistance wire is electrically connected with the low-temperature furnace control cabinet through a lead;
the function converter comprises a first selection relay and a second selection relay, the first selection relay comprises a first fixed contact, a second fixed contact and a first moving contact lapped with the first fixed contact or the second fixed contact, and the second selection relay comprises a third fixed contact, a fourth fixed contact and a second moving contact lapped with the third fixed contact or the fourth fixed contact; the first fixed contact is connected with a power supply of the low-temperature furnace control cabinet, the second fixed contact is connected with the power supply of the high-temperature furnace control cabinet, the third fixed contact is connected with the soft magnetic direct current measuring device, and the fourth fixed contact is connected with the soft magnetic alternating current measuring device; and the number of the first and second groups,
when the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the third fixed contact, the low-temperature furnace control cabinet is switched on, the measuring coil is connected to the soft magnetic direct current measuring device, and the magnetizing coil is connected to the direct current excitation power supply;
when the first moving contact is lapped with the first fixed contact and the second moving contact is lapped with the fourth fixed contact, the low-temperature furnace control cabinet is switched on, the measuring coil is connected to the soft magnetic alternating current measuring device, and the magnetizing coil is connected to the alternating current excitation power supply;
when the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the third fixed contact, the high-temperature furnace control cabinet is switched on, the measuring coil is connected to the soft magnetic direct current measuring device, and the magnetizing coil is connected to the direct current excitation power supply;
when the first moving contact is lapped with the second fixed contact and the second moving contact is lapped with the fourth fixed contact, the high-temperature furnace control cabinet is switched on, the measuring coil is connected to the soft magnetic alternating current measuring device, and the magnetizing coil is connected to the alternating current excitation power supply; and the number of the first and second groups,
when the measuring coil is connected to the soft magnetic direct current measuring device, the ratio of the outer diameter to the inner diameter of the standard ring is less than or equal to 1.4;
when the measuring coil is connected to the soft magnetic alternating current measuring device, the ratio of the outer diameter to the inner diameter of the standard ring is less than or equal to 1.1.
2. The system for measuring high and low temperature dynamic and static soft magnetic characteristics according to claim 1, further comprising two temperature measuring tubes, wherein one of the temperature measuring tubes has one end connected to the low temperature furnace control cabinet and the other end extending into the low temperature tank, and the other temperature measuring tube has one end connected to the high temperature furnace control cabinet and the other end extending into the high temperature furnace.
3. The system for measuring high and low temperature dynamic and static soft magnetic characteristics according to claim 1, wherein an air inlet valve and an air outlet valve are arranged on the high temperature furnace, the air inlet valve is communicated with an air storage tank, inert gas is filled in the air storage tank, and the air outlet valve is communicated with a vacuum pump.
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| CN201710600862.1A CN107479011B (en) | 2017-07-21 | 2017-07-21 | High/low temperature sound state soft magnetic characteristic measuring system |
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| CN201710600862.1A CN107479011B (en) | 2017-07-21 | 2017-07-21 | High/low temperature sound state soft magnetic characteristic measuring system |
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| CN107479011B CN107479011B (en) | 2019-07-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111257806A (en) * | 2020-01-20 | 2020-06-09 | 重庆科技学院 | Method for measuring high-low temperature magnetic property of weak magnetic material |
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