CN106787268A - Compressor and the method for preparing permanent magnet for the compressor - Google Patents

Compressor and the method for preparing permanent magnet for the compressor Download PDF

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Publication number
CN106787268A
CN106787268A CN201611051071.XA CN201611051071A CN106787268A CN 106787268 A CN106787268 A CN 106787268A CN 201611051071 A CN201611051071 A CN 201611051071A CN 106787268 A CN106787268 A CN 106787268A
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CN
China
Prior art keywords
magnet
permanent magnet
compressor
rare earth
earth metal
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CN201611051071.XA
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Chinese (zh)
Inventor
邱小华
廖健生
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Guangdong Meizhi Compressor Co Ltd
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Guangdong Meizhi Compressor Co Ltd
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Priority to CN201611051071.XA priority Critical patent/CN106787268A/en
Publication of CN106787268A publication Critical patent/CN106787268A/en
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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14Metallic material, boron or silicon
    • C23C14/16Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/02Details of the magnetic circuit characterised by the magnetic material
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

The invention discloses compressor and the method for preparing permanent magnet for the compressor, the compressor is driven by the automatically controlled driver of no electrolytic capacitor, and the compressor includes the motor with permanent magnet, the coercivity H j of the permanent magnet is not less than 1900KA/m, and residual magnetic flux density Br is not less than 1.38T.1900KA/m is not less than by using coercivity H j, residual magnetic flux density Br is not less than the permanent magnet of 1.38T, the big problem of the next current of electric of no electrolytic capacitor electric control belt can effectively be reduced, the operation stability and reliability of compressor are improved, the trouble-free operation of no electrolytic capacitor electric control compressor is realized.And the compressor cost is substantially reduced, it is to avoid the shortcoming of electrochemical capacitor.

Description

Compressor and the method for preparing permanent magnet for the compressor
Technical field
The invention belongs to Compressor Technology field, specifically, the present invention relates to compressor and prepare for the compressor Permanent magnet method.
Background technology
The electrochemical capacitor excellent specific property such as have the capacitance of unit volume higher, therefore, the drive of current electric control compressor Dynamic device generally uses electrochemical capacitor.However, electrochemical capacitor has the following disadvantages:1. the life-span is shorter, and volume is larger, and cost It is high;2. electrochemical capacitor can occur electrolyte leakage;3. electrochemical capacitor runs down with the liter high-performance of environment temperature;4. electricity is electrolysed The heat resistance of appearance and impact resistance newly can be very poor, reduce reliability.
Therefore, current electric control compressor still has much room for improvement.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
The present invention is to be based on the following discovery of inventor and complete:
It is well known that the running environment of compressor electric motor is severe, requirement more and more higher of the market to motor temperature characteristic. In electric-control system, in order to cost declining considers, inventor cancels the big electrochemical capacitor in the main circuit of circuit system, i.e., using nothing Electrochemical capacitor driver, after cancelling electrochemical capacitor, the busbar voltage waveform of output is unconventional linear in steamed bun waveform shape, So as to cause the more conventional automatically controlled scheme of the electric current of motor big, the reliability and operation stability of compressor can be affected.Hair A person of good sense has found to reduce current of electric that on the premise of electric machine structure is certain, most effective way is to carry by further investigation Magnet residual magnetic flux density Br high, therefore, coercivity H j is not less than 1900KA/m, residual magnetic flux density Br by inventor Be not less than 1.38T permanent magnet be used for no electrolytic capacitor electric control compressor, it is possible to achieve no electrolytic capacitor electric control compressor it is suitable Profit operation, current of electric is substantially reduced, and the reliability and stability of compressor are significantly improved, and relative to existing compressor, nothing The cost of electrochemical capacitor electric control compressor is substantially reduced.
In view of this, in one aspect of the invention, the invention provides a kind of compressor.Implementation of the invention Example, the compressor is driven by the automatically controlled driver of no electrolytic capacitor, and the compressor includes the motor with permanent magnet, described The coercivity H j of permanent magnet is not less than 1900KA/m, and residual magnetic flux density Br is not less than 1.38T.Inventor has found, by adopting 1900KA/m is not less than with coercivity H j, residual magnetic flux density Br is not less than the permanent magnet of 1.38T, can effectively reduce nothing The big problem of the next current of electric of electrochemical capacitor electric control belt, improves the operation stability and reliability of compressor, realizes electroless The trouble-free operation of electric capacity electric control compressor.And relative to existing electric control compressor, due to not using electrochemical capacitor, according to this hair The compressor cost of bright embodiment is substantially reduced, and effectively prevent that electrochemical capacitor life is shorter, volume is larger, electrolyte Leak, run down with the liter high-performance of environment temperature, heat resistance and the shortcomings of very poor impact resistance.
Embodiments in accordance with the present invention, the capacity cell in the control circuit of the automatically controlled driver of no electrolytic capacitor is by thin Membrane capacitance is constituted.
Embodiments in accordance with the present invention, the busbar voltage Udc's of the control circuit of the automatically controlled driver of no electrolytic capacitor Maximum is more than 2 times of its minimum value.
Permanent magnet in the compressor electric motor of current volume production, to ensure that basic anti-demagnetization capability needs, Hcj is not typically low In 1900KA/m, 1.3T is generally no greater than using conventionally produced permanent magnet residual magnetic flux density Br;And in technique one Under conditions of fixed, because Br and Hcj have restricting relation, in the timings of Hcj mono-, residual magnetic flux density Br to be lifted, using biography System producting process difficulty is larger, and cost performance is not high.Inventor explores and experiment by a large amount of, it is proposed that one kind can ensure to rectify In the case of stupid power, the permanent magnet of residual magnetic flux density is improved.Specifically, embodiments in accordance with the present invention, the permanent magnet Including:Magnet;And magnetic hardening layer, magnetic hardening layer is formed on the surface of the magnet, wherein, the magnet and described Contain heavy rare earth metal element in magnetic hardening layer, the heavy rare earth metal element includes at least one in dysprosium and terbium, the dysprosium It is not more than the 3% of the permanent magnet gross mass with the content sum of terbium.Thus, compressor electric motor according to embodiments of the present invention Permanent magnet has relatively low cost, residual magnetic flux density higher and coercivity higher, so as to reduce motor cost The anti-demagnetization characteristic of motor is greatly improved simultaneously.
Embodiments in accordance with the present invention, the content sum of the heavy rare earth element is not more than the permanent magnet gross mass 3%.Thus, its cost is reduced while ensureing that permanent magnet has coercivity higher, residual magnetic flux density.
Embodiments in accordance with the present invention, the thickness of the direction of magnetization of the magnet is not more than 4mm.Thus, it is possible to ensure weight Thulium uniformly spreads in magnet surface, so as to further improve coercivity, the residual magnetic flux density of permanent magnet.
In another aspect of this invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, the permanent magnet through the following steps that prepare:By the compound of heavy rare earth metal with Solvent mixes to obtain mixture, wherein, the compound of the heavy rare earth metal includes terbium oxide, terbium chloride, terbium nitrate, fluorination At least one is obtained in terbium, dysprosia, dysprosium chloride, dysprosium nitrate and dysprosium fluoride;And the mixture is applied to magnet surface, And the mixture is solidify to form magnetic hardening layer in the magnet surface, so as to obtain the permanent magnet.Thus, according to this hair The preparation of bright embodiment for the method for the permanent magnet of compressor electric motor can prepare it is above-mentioned with lower cost, it is higher surplus The permanent magnet of residual magnetism induction and higher coercivity, so as to the anti-demagnetization of motor be greatly improved while motor cost is reduced Characteristic.
Embodiments in accordance with the present invention, the solidification is carried out by the magnet heat.Thus, it is possible to Magnet surface forms the magnetic hardening layer being evenly distributed, so as to further improve the coercivity of permanent magnet.
Embodiments in accordance with the present invention, the solvent is selected from least one in isopropylidene acetone and sodium salicylate.By This, can be good at dissolving the compound of heavy rare earth metal, be conducive to forming uniform magnetic hardening layer, and raw material in magnet surface Wide material sources are easy to get, and cost is relatively low.
In another aspect of the invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, the permanent magnet through the following steps that prepare:Heavy rare earth metal is carried out at gasification Manage to obtain the steam containing heavy rare earth metal, wherein, the heavy rare earth metal includes at least one in dysprosium and terbium;And make The vapor deposition containing heavy rare earth metal on the surface of magnet, to form magnetic hardening layer, so as to obtain the permanent magnet. Thus, preparation according to embodiments of the present invention for the method for the permanent magnet of compressor electric motor can prepare it is above-mentioned with compared with Residual magnetic flux density inexpensive, higher and the permanent magnet of higher coercivity, so as to very big while motor cost is reduced Improve the anti-demagnetization characteristic of motor.
In still another aspect of the invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, the permanent magnet through the following steps that prepare:Using the compound of heavy rare earth metal Magnet is wrapped up to obtain the magnet by parcel treatment, wherein, the compound of the heavy rare earth metal includes containing terbium Compound and containing at least one in dysprosium compound;And by it is described by parcel treatment magnet carry out high-temperature process, so as to The surface of the magnet forms magnetic hardening layer, so as to obtain the permanent magnet.Thus, preparation according to embodiments of the present invention is used for The method of the permanent magnet of compressor electric motor can prepare the above-mentioned permanent magnet with lower cost and higher coercivity, so that The anti-demagnetization characteristic of motor is greatly improved while motor cost is reduced.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from description of the accompanying drawings below to embodiment is combined Substantially and be readily appreciated that, wherein:
Fig. 1 is the structural representation of permanent magnet according to an embodiment of the invention;
Fig. 2 is the method flow schematic diagram for preparing permanent magnet according to an embodiment of the invention;
Fig. 3 is the method flow schematic diagram for preparing permanent magnet according to further embodiment of the present invention;
Fig. 4 is the method flow schematic diagram for preparing permanent magnet according to another embodiment of the invention;
Fig. 5 is the demagnetizing curve figure of the compressor electric motor for carrying permanent magnet of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " up time The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the invention provides a kind of compressor.Embodiments in accordance with the present invention, the compressor Driven by the automatically controlled driver of no electrolytic capacitor, and the compressor include with permanent magnet motor, the permanent magnet rectify Stupid power Hcj is not less than 1900KA/m, and residual magnetic flux density Br is not less than 1.38T.Inventor has found, by using coercivity Hcj is not less than 1900KA/m, and residual magnetic flux density Br is not less than the permanent magnet of 1.38T, can effectively reduce no electrolytic capacitor The big problem of the next current of electric of electric control belt, improves the operation stability and reliability of compressor, realizes that no electrolytic capacitor is automatically controlled The trouble-free operation of compressor.And relative to existing electric control compressor, due to not using electrochemical capacitor, according to embodiments of the present invention The compressor cost substantially reduce, and effectively prevent that electrochemical capacitor life is shorter, volume is larger, electrolyte leakage, with The liter high-performance of environment temperature runs down, heat resistance and the shortcomings of very poor impact resistance.
It should be noted that term " automatically controlled driver " used herein refers to that power supply supply is converted to specifically The power supply changeover device that voltage x current is rotated with motor.
Embodiments in accordance with the present invention, in addition to above-mentioned motor, the compressor also has its of composition Conventional press His necessary parts, for example can also be including compressor main body, lubrication assembly and cooling component etc..For example, compressor main body can be with Including running part, compression section and housing parts, whole compression process is completed in compressor main body, specific driving section Point, compression section and housing parts and its annexation can as needed select conventional components known in the art.Lubrication group The Main Function of part is the loss of reduction equipment and the consumption of power, and key has been played to energy-conservation and raising operating efficiency. Cooling component be typically cooling compressed medium (can also include cooling main frame and other parts because to equipment lubrication When also play the effect of cooling), make the medium temperature reduction compressed, reduce energy consumption during compression.As long as can expire The above-mentioned use requirement of foot, the lubrication assembly that can be used and cooling component and its set-up mode are it is not also specifically limited, can be for Any of traditional lubrication component and cooling component.
Embodiments in accordance with the present invention, the capacity cell in the control circuit of the above-mentioned automatically controlled driver of no electrolytic capacitor is by thin Membrane capacitance is constituted.That is, relative to the automatically controlled driver of existing use electrochemical capacitor, the automatically controlled drive of compressor of the present invention In the circuit system of dynamic device, original electrolytic capacitor is substituted using thin film capacitor, it is possible thereby to substantially reduce compressor Cost, and electrochemical capacitor shortcoming that may be present can be prevented effectively from.
Embodiments in accordance with the present invention, in the circuit system of the automatically controlled driver of no electrolytic capacitor, busbar voltage Udc's Maximum is more than 2 times of its minimum value.
Embodiments in accordance with the present invention, with reference to Fig. 1, the permanent magnet can include magnet 100 and magnetic hardening layer 200, wherein Magnetic hardening layer 200 is formed on the surface of magnet 100, and heavy rare earth metal element is contained in magnet 100 and magnetic hardening layer 200, The heavy rare earth metal element includes at least one in dysprosium and terbium, and the content sum of dysprosium and terbium is not more than permanent magnet gross mass 3%, for example can be 1~3%.Thus, the permanent magnet of compressor electric motor according to embodiments of the present invention have it is relatively low into Originally, coercivity higher and residual magnetic flux density higher, so as to can greatly reduce electricity while motor cost is reduced The anti-demagnetization characteristic of machine running current and raising motor, so that the trouble-free operation of no electrolytic capacitor electric control compressor is effectively realized, Improve the reliability and operation stability of compressor.Meanwhile, relative in existing compressor electric motor permanent magnet, heavy rare earth is first Element is distributed in the inside of principal phase (magnet), and above-mentioned permanent magnet of the invention can substantially reduce the consumption of heavy rare earth element, and carry The utilization rate of heavy rare earth element high.
According to one embodiment of present invention, the content of heavy rare earth metal element is not particularly restricted, art technology Personnel can be selected according to actual needs, and according to a particular embodiment of the invention, the content sum of heavy rare earth element can be with No more than the 3% of permanent magnet gross mass, for example, can be 1~3%.Specifically, in permanent magnet except containing in terbium and dysprosium element extremely It is few a kind of outer, the heavy rare earth metal elements such as tungsten, caesium can also be contained.Thus, it is possible to ensure to make while with lower cost Obtaining permanent magnet of the invention has coercivity and residual magnetic flux density higher, so as to further reduce the same of motor cost When the anti-demagnetization characteristic of motor is greatly improved.
According to still another embodiment of the invention, the thickness of the direction of magnetization of magnet is not particularly restricted, this area skill Art personnel can be selected according to actual needs, and the thickness of the direction of magnetization of magnet can be not more than 4mm.Inventor's discovery, The thickness range can ensure that heavy rare earth metal element uniformly spreads in magnet surface, be evenly distributed so as to be formed in magnet surface Magnetic hardening layer, and then further improve permanent magnet coercivity.
In another aspect of this invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, above-mentioned permanent magnet can be prepared by following steps:By the compound of heavy rare earth metal with Solvent mixes to obtain mixture, wherein, the compound of the heavy rare earth metal contains terbium oxide, terbium chloride, terbium nitrate, fluorination At least one is obtained in terbium, dysprosia, dysprosium chloride, dysprosium nitrate and dysprosium fluoride;And the mixture is applied to magnet surface, And the mixture is solidify to form magnetic hardening layer in the magnet surface, so as to obtain above-mentioned permanent magnet.Inventor has found, leads to Cross and the compound of heavy rare earth metal and solvent gained mixture are put on into magnet surface, then gained magnet is carried out at solidification Reason, can cause that the part in terbium and dysprosium element in gained mixture diffuses to magnet surface and forms magnetic hardening layer, and another A part is diffused to inside magnet, such that it is able to prepare it is above-mentioned with lower cost, residual magnetic flux density higher and compared with The permanent magnet for the automatically controlled driving compressor electric motor of no electrolytic capacitor of high-coercive force.
The method for preparing above-mentioned permanent magnet of the embodiment of the present invention is described in detail below with reference to Fig. 2.According to this hair Bright embodiment, the method can include:
S100:The compound of heavy rare earth metal is mixed with solvent
Embodiments in accordance with the present invention, the compound of heavy rare earth metal is mixed with solvent.Thus, it is possible to convenient subsequently will Heavy rare earth metal compound is attached to magnet surface.
According to one embodiment of present invention, the compound of heavy rare earth metal includes terbium oxide, terbium chloride, terbium nitrate, fluorine At least one is obtained in change terbium, dysprosia, dysprosium chloride, dysprosium nitrate and dysprosium fluoride.According to still a further embodiment, solvent Particular type be not particularly restricted, those skilled in the art can be selected according to actual needs, of the invention Specific embodiment, solvent can be selected from least one in isopropylidene acetone and sodium salicylate.Inventor's discovery, such solvent The compound of heavy rare earth metal can be preferably dissolved, and gained mixture has viscosity higher so that gained mixture Can be very good to be attached to the surface of magnet, so that the part in subsequent high temperature processing procedure in terbium and dysprosium element The uniform magnet surface that diffuses to forms the magnetic hardening layer being evenly distributed, and then improves permanent magnet while permanent magnet cost is reduced Coercivity and residual magnetic flux density, in addition such solvent can be vapored away completely in subsequent high temperature processing procedure so that Gained magnetic hardening layer will not be polluted, and then further improve the coercivity of permanent magnet.
S200:Resulting mixture is applied to magnet surface, and it is hard mixture is solidify to form magnetic in magnet surface Change layer
Embodiments in accordance with the present invention, resulting mixture is applied to magnet surface in step S100, and makes mixture Magnetic hardening layer is solidify to form in magnet surface, so as to obtain the permanent magnet for compressor electric motor.
According to one embodiment of present invention, the particular type of magnet is not particularly restricted, and those skilled in the art can To be selected according to actual needs, magnet can be not more than the magnet of 4mm for the thickness of the direction of magnetization.Inventor has found, is somebody's turn to do The magnet of thickness range can ensure that heavy rare earth metal element uniformly spreads in magnet surface, be distributed so as to be formed in magnet surface Uniform magnetic hardening layer, and then further improve the coercivity and residual magnetic flux density of permanent magnet.
According to still a further embodiment, the concrete mode of solidification is not particularly restricted, those skilled in the art Can according to actual needs be selected, according to a particular embodiment of the invention, can be consolidated by carrying out heating to magnet Change.Specific example of the invention, the temperature of curing process can be at 1000 DEG C.Inventor has found, at this temperature can be with Ensure that the heavy rare earth metal element in gained mixture uniformly diffuses to magnet surface, be evenly distributed so as to be formed in magnet surface Magnetic hardening layer, and then further improve permanent magnet coercivity and residual magnetic flux density.
In another aspect of the invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, above-mentioned permanent magnet can also be prepared by following steps:Heavy rare earth metal is carried out Gasification process to obtain the steam containing heavy rare earth metal, wherein, the heavy rare earth metal include dysprosium and terbium at least one; And make the vapor deposition containing heavy rare earth metal on the surface of magnet, to form magnetic hardening layer, so as to be used for The permanent magnet of compressor electric motor.Inventor's discovery, gasification process is carried out by by heavy rare earth metal, then containing obtained by The steam for having heavy rare earth metal is processed magnet, and a part of uniform deposition of terbium and dysprosium element can be caused in magnet table Face, and another part is diffused to inside magnet, so as to form the magnetic hardening layer being evenly distributed, and then can prepare above-mentioned tool There is the permanent magnet for compressor electric motor of lower cost, residual magnetic flux density higher and higher coercivity.
The method for preparing above-mentioned permanent magnet of the embodiment of the present invention is described in detail below with reference to Fig. 3.According to this hair Bright embodiment, the method includes:
S100A:Heavy rare earth metal is carried out into gasification process
Embodiments in accordance with the present invention, gasification process is carried out by heavy rare earth metal, such that it is able to obtain containing heavy rare earth gold The steam of category, wherein, heavy rare earth metal includes at least one in dysprosium and terbium.According to one embodiment of present invention, at gasification The condition of reason is not particularly restricted, and those skilled in the art can be selected according to actual needs, tool of the invention Body embodiment, gasification process can be carried out at 1000 DEG C.Thus, it is possible to convenient subsequently form what is be evenly distributed in magnet surface Magnetic hardening layer, so as to significantly improve the coercivity and residual magnetic flux density of permanent magnet.
S200A:Make the vapor deposition containing heavy rare earth metal for obtaining on the surface of magnet
Embodiments in accordance with the present invention, make the vapor deposition containing heavy rare earth metal that step S100A is obtained in magnet Surface, to form magnetic hardening layer on the surface of magnet, it is hereby achieved that above-mentioned permanent magnet.In the step, specifically, can be with Magnet is positioned in the steam atmosphere containing heavy rare earth metal so that heavy rare earth metal diffuses to magnet surface and in magnet table Face carries out deposition and forms magnetic hardening layer, and gained magnet then is carried out into cooling treatment can both obtain above-mentioned permanent magnetism of the invention Body.
According to one embodiment of present invention, the particular type of magnet is not particularly restricted, and those skilled in the art can To be selected according to actual needs, magnet can be not more than the magnet of 4mm for the thickness of the direction of magnetization.Inventor has found, is somebody's turn to do The magnet of thickness range can ensure that heavy rare earth metal element uniformly spreads in magnet surface, be distributed so as to be formed in magnet surface Uniform magnetic hardening layer, and then further improve the coercivity and residual magnetic flux density of permanent magnet.
In still another aspect of the invention, prepared for the permanent magnet in compressor noted earlier the invention provides a kind of Method.Embodiments in accordance with the present invention, above-mentioned permanent magnet can also be prepared by following steps:Using heavy rare earth metal Compound is wrapped up magnet to obtain the magnet by parcel treatment, wherein, the compound of the heavy rare earth metal includes Containing terbium compound and containing at least one in dysprosium compound;And the magnet by parcel treatment is carried out into high-temperature process, To form magnetic hardening layer on the surface of the magnet, so as to obtain above-mentioned permanent magnet.Inventor has found, by using heavy rare earth The compound of metal is wrapped up magnet, then carries out high-temperature process to it, can cause a part in terbium therein and dysprosium Magnet surface is diffused to, and another part is diffused to inside magnet, so as to form the magnetic hardening being evenly distributed layer in magnet surface, And then can prepare it is above-mentioned with lower cost, residual magnetic flux density higher and higher coercivity for compressing electromechanics The permanent magnet of machine.
The method for preparing above-mentioned permanent magnet of the embodiment of the present invention is described in detail below with reference to Fig. 4.According to this hair Bright embodiment, the method includes:
S100B:Magnet is wrapped up using the compound of heavy rare earth metal
Embodiments in accordance with the present invention, the compound of heavy rare earth metal include containing terbium compound and containing in dysprosium compound extremely Few one kind, for example can be including in terbium oxide, terbium chloride, terbium nitrate, fluorination terbium, dysprosia, dysprosium chloride, dysprosium nitrate and dysprosium fluoride Obtain at least one.Thus, it is possible to significantly improve the coercivity and residual magnetic flux density of permanent magnet.
S200B:The magnet for wrapping up the compound of heavy rare earth metal is carried out into high-temperature process
Embodiments in accordance with the present invention, high-temperature process is carried out by the magnet of compound for wrapping up heavy rare earth metal, so as to The surface of magnet forms magnetic hardening layer, so as to obtain permanent magnet.According to one embodiment of present invention, the condition of high-temperature process is simultaneously It is not particularly limited, those skilled in the art can be selected according to actual needs, according to a particular embodiment of the invention, The temperature of high-temperature process can be 1000 DEG C.Inventor has found, in can ensureing the compound of heavy rare earth metal at this temperature Heavy rare earth metal element uniformly diffuses to magnet surface, so as to form the magnetic hardening being evenly distributed layer, Jin Erjin in magnet surface One step improves the coercivity and residual magnetic flux density of permanent magnet.
According to still a further embodiment, the particular type of magnet is not particularly restricted, those skilled in the art Can be selected according to actual needs, magnet can be not more than the magnet of 4mm for the thickness of the direction of magnetization.Inventor's discovery, The magnet of the thickness range can ensure that heavy rare earth metal element uniformly spreads in magnet surface, divide so as to be formed in magnet surface The uniform magnetic hardening layer of cloth, and then further improve the coercivity and residual magnetic flux density of permanent magnet.
Below with reference to specific embodiment, present invention is described, it is necessary to explanation, these embodiments are only description Property, and the present invention is limited never in any form.
Embodiment 1
Terbium chloride and dysprosium chloride are mixed with isopropylidene acetone, gained mixture are then applied to magnet surface, And mixture is formed magnetic hardening layer in magnet surface at 1000 DEG C, so that the permanent magnet for compressor electric motor is obtained, institute Obtain terbium and dysprosium element sum in permanent magnet and account for the 3% of permanent magnet heavy amount, the coercivity of gained permanent magnet is 2200KA/m, is remained Residual magnetism induction is more than 1.38T.
Embodiment 2
Terbium oxide and dysprosia are mixed with sodium salicylate, gained mixture is then applied to magnet surface, and Mixture is set to form magnetic hardening layer in magnet surface at 1000 DEG C, so as to obtain the permanent magnet for compressor electric motor, gained Terbium and dysprosium element sum in permanent magnet account for the 2% of permanent magnet heavy amount, and the coercivity of gained permanent magnet is 2100KA/m, remaining Magnetic induction intensity is more than 1.38T.
Embodiment 3
Fluorination terbium and dysprosium fluoride are mixed with sodium salicylate, gained mixture is then applied to magnet surface, and Mixture is set to form magnetic hardening layer in magnet surface at 1000 DEG C, so as to obtain the permanent magnet for compressor electric motor, gained Terbium and dysprosium element sum in permanent magnet account for the 1% of permanent magnet heavy amount, and the coercivity of gained permanent magnet is 1900KA/m, remaining Magnetic induction intensity is more than 1.38T.
Embodiment 4
Terbium simple substance is carried out into gasification process at 1000 DEG C, the steam containing terbium is obtained, then the steam containing terbium sunk On the surface of magnet, so as to obtain the permanent magnet for compressor electric motor, the terbium element in gained permanent magnet accounts for permanent magnetism body weight to product The 1% of quality, the coercivity of gained permanent magnet is 1980KA/m, and residual magnetic flux density is more than 1.38T.
Embodiment 5
Dysprosium simple substance is carried out into gasification process at 1000 DEG C, the steam containing dysprosium is obtained, then the steam containing dysprosium sunk On the surface of magnet, so as to obtain the permanent magnet for compressor electric motor, the dysprosium element in gained permanent magnet accounts for permanent magnetism body weight to product The 2% of quality, the coercivity of gained permanent magnet is 2050KA/m, and residual magnetic flux density is more than 1.38T.
Embodiment 6
Dysprosium simple substance and terbium simple substance are carried out into gasification process at 1000 DEG C, the steam containing terbium and dysprosium is obtained, then will be contained There is the vapor deposition of terbium and dysprosium on the surface of magnet, so that the permanent magnet for compressor electric motor is obtained, in gained permanent magnet Terbium and dysprosium element sum account for the 3% of permanent magnet heavy amount, and the coercivity of gained permanent magnet is 2230KA/m, residual magnetic flux density More than 1.38T.
Embodiment 7
Magnet is wrapped up using terbium oxide powder, then high-temperature process is carried out in 1000 DEG C of lower magnets, so as in magnetic The surface of iron forms magnetic hardening layer, so as to obtain the permanent magnet for compressor electric motor, the terbium element in gained permanent magnet is accounted for forever The 1% of magnet heavy amount, the coercivity of gained permanent magnet is 1940KA/m, and residual magnetic flux density is more than 1.38T.
Embodiment 8
Magnet is wrapped up using fluorination terbium and dysprosium fluoride powder, is then carried out high-temperature process in 1000 DEG C of lower magnets, To form magnetic hardening layer on the surface of magnet, so that the permanent magnet for compressor electric motor is obtained, the terbium in gained permanent magnet The 2% of permanent magnet heavy amount is accounted for dysprosium element sum, the coercivity of gained permanent magnet is 2100KA/m, and residual magnetic flux density is big In 1.38T.
Embodiment 9
Magnet is wrapped up using terbium chloride and dysprosium chloride powder, is then carried out high-temperature process in 1000 DEG C of lower magnets, To form magnetic hardening layer on the surface of magnet, so that the permanent magnet for compressor electric motor is obtained, the terbium in gained permanent magnet The 3% of permanent magnet heavy amount is accounted for dysprosium element sum, the coercivity of gained permanent magnet is 2230KA/m, and residual magnetic flux density is big In 1.38T.
Embodiment 10
Will carry the permanent magnet of embodiment 9 compressor electric motor under 130 DEG C of ambient temperature conditions, be passed through amperometric determination its Demagnetization rate changes, shown in measurement result Fig. 5.
As shown in Figure 5, environment temperature of the present invention for the compressor electric motor of the permanent magnet of compressor electric motor at 130 DEG C is carried Under degree, when being passed through the electric current no more than 25A, its rotor demagnetization rate is less than 3%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replacing and modification.

Claims (11)

1. a kind of compressor, it is characterised in that the compressor is driven by the automatically controlled driver of no electrolytic capacitor, and the compression Machine includes the motor with permanent magnet, and the coercivity H j of the permanent magnet is not less than 1900KA/m, and residual magnetic flux density Br is not Less than 1.38T.
2. compressor according to claim 1, it is characterised in that the control circuit of the automatically controlled driver of no electrolytic capacitor In capacity cell be made up of thin-film capacitor.
3. compressor according to claim 1 and 2, it is characterised in that the control of the automatically controlled driver of no electrolytic capacitor The maximum of the busbar voltage Udc of circuit processed is more than 2 times of its minimum value.
4. compressor according to claim 1, it is characterised in that the permanent magnet includes:
Magnet;And
Magnetic hardening layer, the magnetic hardening layer is formed on the surface of the magnet,
Wherein, heavy rare earth metal element is contained in the magnet and magnetic hardening layer, the heavy rare earth metal element includes dysprosium With at least one in terbium, the content sum of the dysprosium and terbium is not more than the 3% of the permanent magnet gross mass.
5. compressor according to claim 4, it is characterised in that the content sum of the heavy rare earth element is not more than described The 3% of permanent magnet gross mass.
6. compressor according to claim 4, it is characterised in that the thickness of the direction of magnetization of the magnet is not more than 4mm.
7. a kind of method prepared for the permanent magnet in compressor any one of claim 1-6, it is characterised in that bag Include:
The compound of heavy rare earth metal is mixed to obtain mixture with solvent, wherein, the compound bag of the heavy rare earth metal Include and obtain at least one in terbium oxide, terbium chloride, terbium nitrate, fluorination terbium, dysprosia, dysprosium chloride, dysprosium nitrate and dysprosium fluoride;And
The mixture is applied to magnet surface, and the mixture is solidify to form magnetic hardening layer in the magnet surface, So as to obtain the permanent magnet.
8. method according to claim 7, it is characterised in that the solidification is carried out by carrying out heating to the magnet 's.
9. method according to claim 7, it is characterised in that the solvent is selected from isopropylidene acetone and sodium salicylate At least one.
10. a kind of method prepared for the permanent magnet in compressor any one of claim 1-6, it is characterised in that Including:
Heavy rare earth metal is carried out into gasification process to obtain the steam containing heavy rare earth metal, wherein, the heavy rare earth metal bag Include at least one in dysprosium and terbium;And
Make the vapor deposition containing heavy rare earth metal on the surface of magnet, to form magnetic hardening layer, so as to obtain described Permanent magnet.
A kind of 11. methods prepared for the permanent magnet in compressor any one of claim 1-6, it is characterised in that Including:
The compound of heavy rare earth metal is used to be wrapped up magnet to obtain the magnet by parcel treatment, wherein, it is described heavy The compound of rare earth metal is included containing terbium compound and containing at least one in dysprosium compound;And
The magnet by parcel treatment is carried out into high-temperature process, to form magnetic hardening layer on the surface of the magnet, from And obtain the permanent magnet for compressor electric motor.
CN201611051071.XA 2016-11-22 2016-11-22 Compressor and the method for preparing permanent magnet for the compressor Pending CN106787268A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1410496A (en) * 2001-10-10 2003-04-16 华新丽华股份有限公司 Environmental protection cable wire coating composition
JP2008069415A (en) * 2006-09-14 2008-03-27 Ulvac Japan Ltd Method of manufacturing magnetic material for bonded magnet and rare earth bonded magnet produced by using this magnetic material
CN104752049A (en) * 2013-12-31 2015-07-01 现代自动车株式会社 Process For Preparing Rare Earth Magnets
CN104979917A (en) * 2015-07-02 2015-10-14 广东美芝制冷设备有限公司 Permanent magnet for compressor motor, preparation method and application thereof
CN105515354A (en) * 2016-01-22 2016-04-20 珠海格力节能环保制冷技术研究中心有限公司 Method, device and system for controlling compressor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1410496A (en) * 2001-10-10 2003-04-16 华新丽华股份有限公司 Environmental protection cable wire coating composition
JP2008069415A (en) * 2006-09-14 2008-03-27 Ulvac Japan Ltd Method of manufacturing magnetic material for bonded magnet and rare earth bonded magnet produced by using this magnetic material
CN104752049A (en) * 2013-12-31 2015-07-01 现代自动车株式会社 Process For Preparing Rare Earth Magnets
CN104979917A (en) * 2015-07-02 2015-10-14 广东美芝制冷设备有限公司 Permanent magnet for compressor motor, preparation method and application thereof
CN105515354A (en) * 2016-01-22 2016-04-20 珠海格力节能环保制冷技术研究中心有限公司 Method, device and system for controlling compressor

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Application publication date: 20170531