CN105978198A - Motor rotor and motor with same and compressor - Google Patents

Motor rotor and motor with same and compressor Download PDF

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Publication number
CN105978198A
CN105978198A CN201610514012.5A CN201610514012A CN105978198A CN 105978198 A CN105978198 A CN 105978198A CN 201610514012 A CN201610514012 A CN 201610514012A CN 105978198 A CN105978198 A CN 105978198A
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CN
China
Prior art keywords
magnet
groove
insertion groove
magnetic force
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610514012.5A
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Chinese (zh)
Other versions
CN105978198B (en
Inventor
坂柳智司
盖蕊
张�诚
伏拥军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Midea Toshiba Compressor Corp
Guangdong Meizhi Compressor Co Ltd
Anhui Meizhi Precision Manufacturing Co Ltd
Original Assignee
Guangdong Meizhi Compressor Co Ltd
Anhui Meizhi Precision Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Meizhi Compressor Co Ltd, Anhui Meizhi Precision Manufacturing Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201610514012.5A priority Critical patent/CN105978198B/en
Priority to CN201910285777.XA priority patent/CN110011442B/en
Publication of CN105978198A publication Critical patent/CN105978198A/en
Application granted granted Critical
Publication of CN105978198B publication Critical patent/CN105978198B/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Abstract

The invention discloses a motor rotor and a motor with the same and a compressor. The rotor comprises a body and a plurality of permanent magnets, wherein the body is provided with a plurality of magnet slot groups penetrating through the body axially and spaced circumferentially, each magnet slot group comprises at least two magnet slots spaced in the radial direction of the body, and each magnet slot comprises a magnet insertion slot and a magnetism isolating slot; and the plurality of permanent magnets are respectively inserted into the plurality of magnet slots, and the coercive force of the permanent magnets inserted into the magnet insertion slots on the inner circumference of the body is greater than that of the permanent magnets inserted into the magnet insertion slots on the outer circumference of the body. According to the motor rotor, the magnetic fluxes of the permanent magnets in the magnet slot groups are combined into the total flux of the motor rotor, so that the total interlinking magnetic flux of an armature winding in a motor stator is changed according to the operating state of the motor, and the efficiency of large-range operating frequency of the motor from a low-speed area to a high-speed area is improved.

Description

Motor rotor and there is its motor, compressor
Technical field
The present invention relates to Compressor Technology field, more particularly, to a kind of motor rotor and have its motor, Compressor.
Background technology
Under the operating condition of the high torque (HT) in low rotation speed area of the hermetic type compressor motor in correlation technique, because of The torque of necessity is created so that the efficiency of motor reduces for adding the armature winding electric current of motor stator.It addition, During motor operating in high-speed region, in order to prevent frequency changer circuit element etc. from breakage occurring, need to carry out weak magnetic control with Suppress the rising of the induced voltage of the armature winding generation because of configuration in motor stator, the efficiency of motor the most also can be made to drop Low, have a strong impact on the performance of motor.
Summary of the invention
It is contemplated that solve one of above-mentioned technical problem the most to a certain extent.To this end, the present invention proposes a kind of electricity Motivation rotor, the simple in construction of this motor rotor, processing, easy to manufacture, motor can be improved and transport in full operation range The efficiency turned, is conducive to improving the performance of motor.
The present invention also proposes a kind of have the motor of above-mentioned motor rotor, compressor.
The motor rotor of embodiment according to a first aspect of the present invention, including: body, described body has multiple along its axle To through and along its circumferentially spaced layout Magnet groove group, each described Magnet groove group includes that at least two is along described respectively The Magnet groove being radially spaced layout of body, each described Magnet groove includes Magnet insertion groove and magnet isolation tank, described Magnet respectively Insertion groove along be perpendicular to described body d direction of principal axis extend, described magnet isolation tank be located at described Magnet insertion groove two ends and with institute Stating the conducting of Magnet insertion groove, described magnet isolation tank stretches out along the q direction of principal axis of described body；Multiple permanent magnets, multiple described in forever Magnet is plugged in multiple described Magnet groove respectively, at described body radially, is positioned at the described magnetic of the inner circumferential of described body In ferrum insertion groove, the coercivity of the described permanent magnet of grafting is more than the described Magnet insertion groove interpolation of the periphery being positioned at described body The coercivity of the described permanent magnet connect.
Motor rotor according to embodiments of the present invention, multiple has the footpath along body by arranging on the body of rotor To the Magnet groove group of multiple Magnet grooves arranged spaced apart, and in Magnet groove, configure suitable permanent magnet, thus it is possible to vary permanent magnetism The magnetic flux of ferrum so that the magnetic flux of the permanent magnet in each Magnet groove group is synthetically formed the total magnetic flux of motor rotor, from And total flux of interlinkage of armature winding in motor stator can be changed according to the operating condition of motor, improve motor from Low-speed region is to the efficiency of the operating frequency on a large scale of high-speed region, and then improves the performance of motor, this motor rotor Simple in construction, each parts connect reliable, are convenient to mount and dismount, processing, easy to manufacture.
It addition, motor rotor according to embodiments of the present invention, it is also possible to have a following additional technical characteristic:
According to one embodiment of present invention, each described Magnet groove group includes being radially spaced along described body respectively The the first Magnet groove arranged and the second Magnet groove, described first Magnet groove is positioned at the outside of described second Magnet groove, and described first Magnet groove include the first Magnet insertion groove and the first magnet isolation tank, described second Magnet groove include the second Magnet insertion groove and second every Magnetic groove.
According to one embodiment of present invention, described permanent magnet includes variable magnetic force Magnet and fixing magnetic force Magnet, described Variable magnetic force Magnet is located in described first Magnet insertion groove, and described fixing magnetic force Magnet is located at described second Magnet insertion groove In.
According to one embodiment of present invention, each described variable magnetic force Magnet extends along the direction being perpendicular to described d axle Width be W1, each described fixing magnetic force Magnet along be perpendicular to described d axle direction extend width be W2, described W1 and institute State W2 to meet: 0.5W2 W1 1.5W2.
According to one embodiment of present invention, described fixing magnetic force Magnet by heavy rare earth element dysprosium content be 0WT% extremely Province's dysprosium rare earth sintering of 4WT% is formed.
According to one embodiment of present invention, the magnetic bridge width between described first magnet isolation tank and the outline of described body For T1, the magnetic bridge width between described second magnet isolation tank and the outline of described body is T2, and described T1 Yu T2 meets: T1 T2。
According to one embodiment of present invention, described body is formed by multiple electromagnetic steel plate superpositions, and described T2 is more than each The thickness of described electromagnetic steel plate.
According to one embodiment of present invention, each described first Magnet groove also includes two additional magnet isolation tanks, two institutes State additional magnet isolation tank be respectively adjacent to the two ends setting of described first Magnet insertion groove and be positioned at outside described first Magnet insertion groove Side, two described additional magnet isolation tanks are respectively along the circumferentially extending of described body and between two described first magnet isolation tanks.
According to one embodiment of present invention, each described additional magnet isolation tank respectively with neighbouring described first magnet isolation tank phase Connect or disconnect.
According to one embodiment of present invention, it is respectively equipped with additional magnet insertion groove, institute in each described first magnet isolation tank It is provided with permanent magnet in stating additional magnet insertion groove.
According to one embodiment of present invention, it is provided with described variable magnetic force Magnet or described in described additional magnet insertion groove Fixing magnetic force Magnet.
According to one embodiment of present invention, the described variable magnetic force Magnet in each described first Magnet insertion groove is along hanging down The width directly extended in the direction of described d axle is W3, the described fixing magnetic force Magnet edge in each described second Magnet insertion groove The width of the direction extension being perpendicular to described d axle is W4, and described W3 and described W4 meets: 0.25W4 W3 W4.
According to one embodiment of present invention, each described Magnet groove group includes being radially spaced along described body respectively The first Magnet groove, the second Magnet groove and the 3rd Magnet groove arranged, described first Magnet groove is positioned at outside described second Magnet groove Side, described second Magnet groove is positioned at the outside of described 3rd Magnet groove, described first Magnet groove include the first Magnet insertion groove and First magnet isolation tank, described second Magnet groove includes that the second Magnet insertion groove and the second magnet isolation tank, described 3rd Magnet groove include Three Magnet insertion grooves and the 3rd magnet isolation tank.
According to one embodiment of present invention, described permanent magnet includes variable magnetic force Magnet and fixing magnetic force Magnet, described Described variable magnetic force Magnet it is provided with, in described second Magnet insertion groove and described 3rd Magnet insertion groove in first Magnet insertion groove It is respectively equipped with described fixing magnetic force Magnet.
According to one embodiment of present invention, described in described second Magnet insertion groove and described 3rd Magnet insertion groove The coercivity of fixing magnetic force Magnet is equal.
According to one embodiment of present invention, in described first magnet isolation tank, it is provided with the first additional magnet insertion groove, described The second additional magnet insertion groove it is provided with, in described first additional magnet insertion groove and the second additional magnet insertion groove in two magnet isolation tanks It is respectively equipped with permanent magnet.
According to one embodiment of present invention, described permanent magnet includes variable magnetic force Magnet and fixing magnetic force Magnet, described Being provided with described variable magnetic force Magnet in first Magnet insertion groove and described first additional magnet insertion groove, described second Magnet inserts It is respectively equipped with described fixing magnetic force Magnet in groove and described second additional magnet insertion groove.
According to one embodiment of present invention, described permanent magnet includes variable magnetic force Magnet and fixing magnetic force Magnet, described Different permanent magnet it is respectively equipped with in first Magnet insertion groove and described first additional magnet insertion groove.
The motor of embodiment according to a second aspect of the present invention, including according to the motor rotor described in above-described embodiment.
The compressor of embodiment according to a third aspect of the present invention, including according to the motor described in above-described embodiment.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become Substantially with easy to understand, wherein:
Fig. 1 is the structural representation of motor rotor according to an embodiment of the invention；
Fig. 2 is the structural representation of the motor rotor according to another embodiment of the present invention；
Fig. 3 is the structural representation of motor rotor in accordance with another embodiment of the present invention；
Fig. 4 is the structural representation of motor rotor according to an embodiment of the invention；
Fig. 5 is the structural representation of the motor rotor according to another embodiment of the present invention；
Fig. 6 is the structural representation of motor rotor in accordance with another embodiment of the present invention；
Fig. 7 is the structural representation of compressor according to embodiments of the present invention.
Reference:
100: compressor；
10: motor；
20 (20a, 20b, 20c): rotor；
21: body；
211 (211a, 211b, 211c): first Magnet groove；
2111 (2111a, 2111b, 2111c): first Magnet insertion groove；
2112 (2112a, 2112b, 2112c): the first magnet isolation tank；
2113b: additional magnet isolation tank；
212 (212a, 212b, 213c): second Magnet groove；
2121 (2121a, 2121b, 2121c): second Magnet insertion groove；
2122 (2122a, 2122b, 2122c): the second magnet isolation tank；
213c: the three Magnet groove；
2131c: the three Magnet insertion groove；
2132c: the three magnet isolation tank；
22: permanent magnet；221: variable magnetic force Magnet；222: fixing magnetic force Magnet；
30: casing；31: accommodate chamber；
40: cylinder.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Motor rotor in correlation technique, is obtained by the total magnetic flux of variable magnetic force Magnet with fixing magnetic force Magnet Torque ratio is high, therefore, needs high total magnetic flux for obtaining high torque (HT), then needs to increase variable magnetic force Magnet and fixing magnetic force magnetic The volume of ferrum, thickeies the two thickness in the direction of magnetization.So motor under operating condition, utilize armature winding electric current to can When variable magnetic force Magnet carries out magnetization, then need big magnetizing current, can cause what the capacity of frequency changer circuit element strengthened to ask Topic.
To this end, the present invention proposes a kind of motor rotor 20, the simple in construction of this motor rotor 20, process, manufacture appearance Easily, the efficiency that motor 10 operates in full operation range can be improved, thus improve the performance of motor 10.
1 to Fig. 6 specifically describes the motor rotor 20 of embodiment according to a first aspect of the present invention below in conjunction with the accompanying drawings.
Motor rotor 20 according to embodiments of the present invention includes body 21 and multiple permanent magnet 22.Specifically, body 21 have multiple along its axially through and along the Magnet groove group of its circumferentially spaced layout, each Magnet groove group includes at least respectively Two Magnet grooves being radially spaced layout along body 21, each Magnet groove includes Magnet insertion groove and magnet isolation tank, magnetic respectively Ferrum insertion groove along be perpendicular to body 21 d direction of principal axis extend, magnet isolation tank be located at Magnet insertion groove two ends and with Magnet insertion groove Conducting, magnet isolation tank stretches out along the q direction of principal axis of body, and multiple permanent magnets 22 are plugged in multiple Magnet groove respectively, at body 21 radially, is positioned at the coercivity of permanent magnet 22 of the Magnet insertion groove grafting of the inner circumferential of body 21 more than being positioned at body 21 Periphery Magnet insertion groove in the coercivity of permanent magnet 22 of grafting.
In other words, this motor rotor 20 is mainly made up of body 21 and multiple permanent magnet 22.Wherein, body 21 forms edge The column that vertical direction extends, the body 21 of rotor has multiple Magnet groove group along its circumferentially spaced layout, each Magnet Groove group includes at least two (such as 2,3 or more than 3) the Magnet groove being radially spaced layout along body 21, each Magnet groove along body 21 axially through.
Specifically, each Magnet groove includes a Magnet insertion groove and the magnet isolation tank at the two ends being located at Magnet insertion groove, magnetic Ferrum insertion groove connects with two magnet isolation tanks respectively.Wherein, Magnet insertion groove forms strip, and the axis of symmetry of Magnet insertion groove is linear Become d axle, and d axle is through the center of body 21, i.e. the axis of symmetry of Magnet insertion groove radially extending along body 21, adjacent two The axis of symmetry of Magnet groove group forms q axle, and the axis of symmetry of two neighbouring magnet isolation tanks in the most adjacent two Magnet groove groups is q Axle, two ends with Magnet insertion groove respectively, one end of two magnet isolation tanks in each Magnet groove connect, another of two magnet isolation tanks End extending radially outwardly along body 21 respectively, thus facilitate magnetic flux along the q axial flow mistake of motor rotor 20.
Further, permanent magnet 22 it is respectively equipped with in multiple Magnet grooves of each Magnet groove group, wherein, at each Magnet groove The coercivity of the permanent magnet 22 that group is interior, be positioned at inner side is more than the coercivity of the permanent magnet 22 being positioned at outside.
Thus, motor rotor 20 according to embodiments of the present invention, multiple have by arranging on the body 21 of rotor Along the Magnet groove group of the multiple Magnet grooves being radially spaced layout of body 21, and in Magnet groove, configure suitable permanent magnet 22, thus it is possible to vary the magnetic flux of permanent magnet 22 so that the magnetic flux of the permanent magnet 22 in each Magnet groove group is synthetically formed electronic The total magnetic flux of machine rotor 20 can change according to the operating condition of motor 10 (not to be shown with armature winding in motor stator Go out) total flux of interlinkage, thus improve the efficiency of the motor 10 operating frequency on a large scale from low-speed region to high-speed region, And then the performance of raising motor 10, the simple in construction of this motor rotor 20, each parts connect reliable, are convenient to mount and dismount, processing, Easy to manufacture.
In certain specific embodiments of the invention, each Magnet groove group includes being radially spaced along body 21 respectively The first Magnet groove 211 and the second Magnet groove 212 arranged, the first Magnet groove 211 is positioned at the outside of the second Magnet groove 212, and first Magnet groove 211 includes the first Magnet insertion groove 2111 and the first magnet isolation tank 2112, and the second Magnet groove 212 includes that the second Magnet inserts Groove 2121 and the second magnet isolation tank 2122.
Specifically, as it is shown in figure 1, in the present embodiment, the body 21 of motor rotor 20 has multiple along between its circumference Magnet groove group arranged apart, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, i.e. One Magnet groove 211 and the second Magnet groove 212, wherein, the outer edge of the first Magnet groove 211 adjacent body 21 is arranged, the second Magnet Groove 212 adjacent body 21 centrally disposed, the first Magnet groove 211 include a first Magnet insertion groove 2111 and two set respectively At first magnet isolation tank 2112 at the two ends of the first Magnet insertion groove 2111, the second Magnet groove 212 includes that second Magnet inserts Groove 2121 and second magnet isolation tank 2122 at two two ends being respectively provided at the second Magnet insertion groove 2121, the first Magnet insertion groove The axis of symmetry (d axle as shown in Figure 1) of 2111 overlaps with the axis of symmetry of the second Magnet insertion groove 2121.
Multiple there are two the Magnet grooves being radially spaced layout along body 21 by arranging on the body 21 of rotor Magnet groove group, and differently configured coercitive permanent magnet 22 in Magnet groove, can by changing the magnetic flux of permanent magnet 22, Make the magnetic flux synthesis of the permanent magnet 22 in each Magnet groove group, form the total magnetic flux of motor rotor 20, such that it is able to In operating condition change motor stator according to motor 10, total flux of interlinkage of armature winding, improves motor 10 from low Speed region is to the efficiency of the operating frequency on a large scale of high-speed region, and then improves the performance of motor 10.
Wherein, permanent magnet 22 includes variable magnetic force Magnet 221 and fixing magnetic force Magnet 222, and variable magnetic force Magnet 221 is located at In first Magnet insertion groove 2111, fixing magnetic force Magnet 222 is located in the second Magnet insertion groove 2121.With reference to Fig. 1, this motor The body 21 of rotor 20 has multiple Magnet groove group along its circumferentially spaced layout, and each Magnet groove group includes two along body The Magnet groove being radially spaced layout of 21, the i.e. first Magnet groove 211 and the second Magnet groove 212, wherein, the first Magnet groove 211 The outer edge of adjacent body 21 is arranged, the second Magnet groove 212 adjacent body 21 centrally disposed, each first Magnet groove 211 Variable magnetic force Magnet 221 it is provided with in first Magnet insertion groove 2111, and the axis of symmetry of variable magnetic force Magnet 221 and the first Magnet The axis of symmetry of insertion groove 2111 overlaps, and is provided with fixing magnetic force Magnet 222 in each second Magnet groove 212 insertion groove, and fixing The axis of symmetry of magnetic force Magnet 222 and the axis of symmetry of the second Magnet groove 212 overlap.
This motor rotor 20, by two-layer Magnet groove structure, can promote the ratio of Magnet torque and reluctance torque, On the basis of not producing irreversible demagnetization, the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111 and the second Magnet are inserted Enter the fixing magnetic force Magnet 222 in groove 2121 thinning at the thickness of the direction of magnetization, both can reduce the volume of Magnet, reduce Magnet Cost, again can be with the performance of lifting motor 10.
Alternatively, the width that each variable magnetic force Magnet 221 extends along the direction being perpendicular to d axle is W1, each fixing magnetic The width that power Magnet 222 extends along the direction being perpendicular to d axle is that W2, W1 and W2 meet: 0.5W2 W1 1.5W2.
Such as, W1/W2=0.5,1,1.2 or 1.5, when W1/W2 is equal to 1, it is located in the first Magnet insertion groove 2111 The length of variable magnetic force Magnet 221 equal with the length of the fixing magnetic force Magnet 222 being located in the second Magnet insertion groove 2121. The width of variable magnetic force Magnet 221 and fixing magnetic force Magnet 222 meets above-mentioned relation formula, can make variable magnetic force Magnet 221 The magnetic flux of magnetic flux and fixing magnetic force Magnet 222 is merged into the total magnetic flux of motor rotor 20, more effectively be arranged in In motor stator, armature winding interlinks, thus obtains the Magnet torque that total flux of interlinkage brings, and is conducive to improving electricity The efficiency of motivation 10, thus improve the performance of motor 10.
Specifically, if the armature winding of configuration is respectively 25U, 25V, 25W, hermetic type compressor 100 in motor stator Under high temperature and high pressure environment during operating, armature winding 25U, 25V, 25W energising of configuration in motor stator, armature winding exists Short time loads, makes variable magnetic force Magnet 221 produce the magnetizing current of magnetizing field, by changing variable magnetic force Magnet 221 Magnetic flux, can change what the magnetic flux of the magnetic flux by variable magnetic force Magnet 221 and fixing magnetic force Magnet 222 was merged into continuously The total magnetic flux of motor rotor 20, thus according to the operating condition of hermetic type compressor 100, obtain hermetic type compressor in real time 100 use the torque required for motor 10, and then improve the efficiency in the wideband operation range of low-speed region to high-speed region.
If hermetic type compressor 100 low-speed region, High Pressure Difference service condition under operate, to hermetic type compressor 100 With the armature winding energising of configuration in the motor stator of motor 10, can load at short notice, produce variable magnetic force magnetic The magnetizing current increasing magnetic magnetic field of ferrum 221, the magnetic flux of variable magnetic force Magnet 221 increase and the magnetic flux of fixing magnetic force Magnet 222 The total magnetic flux of the motor rotor 20 that amount is merged into can make total flux of interlinkage of armature winding 25U, 25V, 25W increase, from And make hermetic type compressor 100 motor 10 under the conditions of High Pressure Difference, produce high torque (HT), it is achieved high-efficiency operation.
When hermetic type compressor 100 operates under the service condition of low voltage difference, to hermetic type compressor 100 motor 10 Motor stator in configuration armature winding energising, can load, produce the demagnetization of variable magnetic force Magnet 221 at short notice The magnetizing current (electric current reverse with above-mentioned increasing magnetic magnetizing current) in magnetic field, the magnetic flux that variable magnetic force Magnet 221 reduces is with solid The total magnetic flux of the motor rotor 20 determining the magnetic flux synthesis of magnetic force Magnet 222 can make the total flux of interlinkage with armature winding Reduce, so that hermetic type compressor 100 is used motor 10 under the conditions of low voltage difference, produced necessary torque, it is achieved efficiently Operating.
If hermetic type compressor 100, is used to hermetic type compressor 100 when high-speed region operates for acquisition heating capacity The armature winding energising of configuration in the motor stator of motor 10, can load at short notice, produce variable magnetic force Magnet 221 with the magnetizing current (electric current reverse with above-mentioned increasing magnetic magnetizing current) of fixing magnetic force Magnet 222 backing field, variable magnetic force The difference of the magnetic flux of the magnetic flux of Magnet 221 and fixing magnetic force Magnet 222, as the total magnetic flux of motor rotor 20, can enter one Step reduces and total flux of interlinkage of the armature winding of configuration in motor stator, and the induced voltage producing armature winding plays Inhibitory action, on the basis of not carrying out original weak magnetic control, can avoid the breakages such as transducer element, avoid due to weak magnetic The problem controlling to cause copper loss to increase.
Wherein, according to one embodiment of present invention, fixing magnetic force Magnet 222 is 0WT% by heavy rare earth element dysprosium content Province's dysprosium rare earth sintering to 4WT% is formed.The fixing magnetic force Magnet 222 that this material is made can obtain high residual flux density, not Produce in the range of irreversible demagnetization, if reaching and rare-earth sintered magnet (Nd2Fe14B) the same magnetic flux obtained, Both can promote the ratio of reluctance torque by thinning Magnet at the thickness of the direction of magnetization, cost can be reduced again.
Alternatively, according to one embodiment of present invention, the magnetic between the first magnet isolation tank 2112 and the outline of body 21 Bridge width is T1, and the magnetic bridge width between the second magnet isolation tank 2122 and the outline of body 21 is that T2, T1 and T2 meet: T1 T2.Specifically, as it is shown in figure 1, in the present embodiment, the magnetic bridge width between the first magnet isolation tank 2112 and the outline of body 21 Magnetic bridge width T2 between T1 and the second magnet isolation tank 2122 and the outline of body 21 is equal.As shown in Figure 4 and Figure 5, in this reality Executing in example, the magnetic bridge width T1 between the first magnet isolation tank 2112 and the outline of body 21 is more than the second magnet isolation tank 2122 and body Magnetic bridge width T2 between the outline of 21.Advantageously, body 21 is formed by multiple electromagnetic steel plate superpositions, and T2 is more than each electromagnetism The thickness of steel plate.
Thus, by controlling magnetic bridge width T1 and second between the first magnet isolation tank 2112 and the outline of body 21 every magnetic Magnetic bridge width T2 between the outline of groove 2122 and body 21 meets above-mentioned relation formula, and makes the second magnet isolation tank 2122 and basis Magnetic bridge width T2 between the outline of body 21, more than the thickness of slab of the electromagnetic steel plate of rotor, can make in high-speed region, at electricity Form closed circuit magnetic circuit in motivation rotor 20, make the magnetic flux of variable magnetic force Magnet 221 close with the magnetic flux of fixing magnetic force Magnet 222 And motor rotor 20 total magnetic flux to and motor stator in total flux of interlinkage of armature winding of configuration rise To inhibition, it is to avoid frequency changer circuit element etc. occur breakage.
Specifically, the magnetic bridge width T2 between the second magnet isolation tank 2122 and the outline of body 21 is more than the electromagnetic steel of rotor During the thickness of slab of plate, the leakage field produced between the q axle of motor rotor 20 and adjacent pole can be suppressed, thus reduce and turned by motor Son 20 and total flux of interlinkage of the armature winding of configuration in motor stator, be conducive to improving the efficiency of motor 10.
If hermetic type compressor 100 is for obtaining maximum heating capacity, when highest zone operates, to hermetic type compressor 100, with the armature winding energising of configuration in the motor stator of motor 10, can load at short notice, produce variable magnetic force Magnet 221 and the magnetizing current (electric current reverse with magnetizing current) of fixing magnetic force Magnet 222 backing field, at variable magnetic force magnetic The total magnetic flux of the motor rotor 20 that the difference of the magnetic flux of ferrum 221 and the magnetic flux of fixing magnetic force Magnet 222 is formed is with electronic When total flux of interlinkage of the armature winding of machine stator becomes minimum, the inside formed by motor rotor 20 can be reduced and close Total flux of interlinkage between the armature winding of magnetic circuit and motor stator, avoids frequency conversion loop element etc. that breakage occurs.
Additionally, when hermetic type compressor 100 is for obtaining maximum heating capacity, operating in high-speed region, variable magnetic force The magnetic flux of Magnet 221 is minimum, by by the first Magnet groove 211 of rotor with the difference of the magnetic flux of fixing magnetic force Magnet 222 The magnetic bridge width T1 of the first magnet isolation tank 2112 be set in the total flux of interlinkage on motor 10 without impact in the range of, make airtight Type compressor 100 is to obtain under maximum heating capacity, service condition beyond the operating of high-speed region, motor rotor 20 Total magnetic flux can interlink effectively with the armature winding of motor stator, thus obtains the magnetic that total flux of interlinkage brings Ferrum torque.
The electrical current of the armature winding configured in needing exist for explanation, motor stator, adds the most at short notice Carry, and copper loss can be produced when variable magnetic force Magnet 221 produces increase and decrease magnetic action to the magnetizing current in magnetic field, after magnetizing current loads Do not occur, weak magnetic control can be realized according to motor 10 in the running speed of high-speed region.
In other detailed description of the invention of the present invention, each first Magnet groove 211 also includes two additional magnet isolation tanks 2113b, two additional magnet isolation tank 2113b are respectively adjacent to the two ends of the first Magnet insertion groove 2111 and arrange and be positioned at the first Magnet and insert Entering the outside of groove 2111, two additional magnet isolation tank 2113b are respectively along the circumferentially extending of body 21 and be positioned at two the first magnet isolation tanks Between 2112.
Specifically, the body 21 of motor rotor 20 has multiple Magnet groove group along its circumferentially spaced layout, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet groove 211 and the second Magnet groove 212, wherein, the outer edge of the first Magnet groove 211 adjacent body 21 is arranged, and the center of the second Magnet groove 212 adjacent body 21 sets Put, the first Magnet groove 211 include a first Magnet insertion groove 2111, be located at the first Magnet insertion groove 2111 two ends first Magnet isolation tank 2112 and two the additional magnet isolation tank 2113b being located at the first magnet isolation tank 2112 two ends, the second Magnet groove 212 includes one Second Magnet insertion groove 2121 and be located at second magnet isolation tank 2122 at two ends of the second Magnet insertion groove 2121.
Wherein, in each Magnet groove group, the inner of two the first magnet isolation tanks 2112 respectively with the first Magnet insertion groove The two ends connection of 2111, two additional magnet isolation tank 2113b be respectively provided at the both sides of the first Magnet insertion groove 2111 and two add One end of magnet isolation tank 2113b is arranged adjacent to the outer end of two the first Magnet insertion grooves 2111, and two additional magnet isolation tank 2113b The other end extends along the circumference of body 21 to the d axle near each Magnet groove group respectively.
The variable magnetic force configured in so can making the first Magnet insertion groove 2111 orthogonal with the d axle of motor rotor 20 The fixing magnetic force of configuration in the magnetic flux of Magnet 221 and the second Magnet insertion groove 2121 orthogonal with the d axle of motor rotor 20 The magnetic flux of Magnet 222 all concentrates near the d axle of motor rotor 20, is conducive to improving the efficiency of motor 10.
Alternatively, each additional magnet isolation tank 2113b is connected with the first neighbouring magnet isolation tank 2112 or disconnects respectively.
As in figure 2 it is shown, in the present embodiment, in each Magnet groove group, the inner difference of two the first magnet isolation tanks 2112 Connecting with the two ends of the first Magnet insertion groove 2111, two additional magnet isolation tank 2113b are respectively provided at the first Magnet insertion groove 2111 Both sides and the outer end with two the first Magnet insertion grooves 2111 respectively, one end of two additional magnet isolation tank 2113b connect, and two The other end of individual additional magnet isolation tank 2113b extends along the circumference of body 21 to the d axle near each Magnet groove group respectively.So may be used To reduce cogging torque and torque pulsation, the induction voltage waveform that the armature winding configured in making motor stator is sensed is just String.
As it is shown on figure 3, in the present embodiment, in each Magnet groove group, the inner difference of two the first magnet isolation tanks 2112 Connecting with the two ends of the first Magnet insertion groove 2111, two additional magnet isolation tank 2113b are respectively provided at the first Magnet insertion groove 2111 Both sides and one end of two additional magnet isolation tank 2113b arranged spaced apart with the outer end of two the first Magnet insertion grooves 2111, and The other end of two additional magnet isolation tank 2113b extends along the circumference of body 21 to the d axle near each Magnet groove group respectively, and i.e. two Individual additional magnet isolation tank 2113b is between two the first magnet isolation tanks 2112.
Hermetic type compressor 100 loads magnetizing current at short notice with the motor stator armature winding of motor 10 and makes The magnetic field of the variable magnetic force Magnet 221 first Magnet insertion groove 2111 in orthogonal with the d axle of motor rotor 20 produces magnetization, Make variable magnetic force Magnet 221 always interlinking according to the armature winding of the service condition of hermetic type compressor 100 and motor stator Magnetic flux generation can increase continuously, subtract magnetic action, equally reduces cogging torque and torque pulsation, joins in making motor stator The induction voltage waveform sine sensed on the armature winding put.
It addition, according to one embodiment of present invention, it is respectively equipped with additional magnet in each first magnet isolation tank 2112 and inserts Groove (position at permanent magnet 22 place as shown in Figure 4), is provided with permanent magnet 22 in additional magnet insertion groove.The most each first magnet isolation tank It is equipped with a permanent magnet 22 in 2112, and the length of the permanent magnet 22 in this position is less than the length of the first magnet isolation tank 2112.
Alternatively, variable magnetic force Magnet 221 or fixing magnetic force Magnet 222 it are provided with in additional magnet insertion groove.Specifically, as Shown in Fig. 4, in the present embodiment, the first Magnet groove 211 includes that a first Magnet insertion groove 2111 is inserted with being located at the first Magnet Enter first magnet isolation tank 2112 at the two ends of groove 2111, two the first magnet isolation tanks 2112 respectively with the two of the first Magnet insertion groove 2111 End connection, the other end of two the first magnet isolation tanks 2112 extending radially outwardly along body 21 respectively, wherein, each first every magnetic Variable magnetic force Magnet 221 it is provided with in groove 2112.
As it is shown in figure 5, in the present embodiment, the first Magnet groove 211 includes a first Magnet insertion groove 2111 and is located at First magnet isolation tank 2112 at the two ends of the first Magnet insertion groove 2111, two the first magnet isolation tanks 2112 insert with the first Magnet respectively The two ends connection of groove 2111, the other end of two the first magnet isolation tanks 2112 extending radially outwardly along body 21 respectively, wherein, often It is provided with fixing magnetic force Magnet 222 in individual first magnet isolation tank 2112.
Wherein, the variable magnetic force Magnet 221 in each first Magnet insertion groove 2111 extends along the direction being perpendicular to d axle Width is W3, the width that the fixing magnetic force Magnet 222 in each second Magnet insertion groove 2121 extends along the direction being perpendicular to d axle Meet for W4, W3 and W4: 0.25W4 W3 W4.Such as, W3/W4=0.25,0.5,0.8 or 1, when W1/W2 is equal to 1, It is located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111 and is located at consolidating in the second Magnet insertion groove 2121 The length determining magnetic force Magnet 222 is equal.
The width of variable magnetic force Magnet 221 and fixing magnetic force Magnet 222 meets above-mentioned relation formula, can make variable magnetic force magnetic The magnetic flux of the magnetic flux of ferrum 221 and fixing magnetic force Magnet 222 is merged into the total magnetic flux of motor rotor 20, more effectively with In being arranged in motor stator, armature winding interlinks, thus obtains the Magnet torque that total flux of interlinkage brings.
In certain specific embodiments of the invention, each Magnet groove group includes being radially spaced along body 21 respectively First Magnet groove the 211, the second Magnet groove 212 and the 3rd Magnet groove 213c arranged, the first Magnet groove 211 is positioned at the second Magnet groove The outside of 212, the second Magnet groove 212 is positioned at the outside of the 3rd Magnet groove 213c, and the first Magnet groove 211 includes that the first Magnet inserts Groove 2111 and the first magnet isolation tank 2112, the second Magnet groove 212 includes the second Magnet insertion groove 2121 and the second magnet isolation tank 2122, the Three Magnet groove 213c include the 3rd Magnet insertion groove 2131c and the 3rd magnet isolation tank 2132c.
Specifically, as shown in Figure 6, the body 21 of motor rotor 20 has multiple Magnet along its circumferentially spaced layout Groove group, each Magnet groove group includes three Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet groove 211, Two Magnet grooves 212 and the 3rd Magnet groove 213c, wherein, the outer edge of the first Magnet groove 211 adjacent body 21 is arranged, the 3rd Magnet Groove 213c adjacent body 21 centrally disposed, the second Magnet groove 212 be located at the first Magnet groove 211 and the 3rd Magnet groove 213c it Between.
First Magnet groove 211 includes a first Magnet insertion groove 2111 and is located at the two ends of the first Magnet insertion groove 2111 The first magnet isolation tank 2112, the second Magnet groove 212 includes a second Magnet insertion groove 2121 and is located at the second Magnet insertion groove Second magnet isolation tank 2122 at the two ends of 2121, the 3rd Magnet groove 213c includes a 3rd Magnet insertion groove 2131c and is located at the The 3rd magnet isolation tank 2132c at the two ends of three Magnet insertion groove 2131c, the axis of symmetry of the first Magnet insertion groove 2111, the second magnetic The axis of symmetry of ferrum insertion groove 2121 and the 3rd Magnet insertion groove 2131c overlaps.
Multiple there are three the Magnet grooves being radially spaced layout along body 21 by arranging on the body 21 of rotor Magnet groove group, and differently configured coercitive permanent magnet 22 in Magnet groove, can by changing the magnetic flux of permanent magnet 22, Make the magnetic flux synthesis of the permanent magnet 22 in each Magnet groove group, form the total magnetic flux of motor rotor 20, such that it is able to In operating condition change motor stator according to motor 10, total flux of interlinkage of armature winding, improves motor 10 from low Speed region is to the efficiency of the operating frequency on a large scale of high-speed region, and then improves the performance of motor 10.
This motor rotor 20, by three layers of Magnet groove structure, can promote the ratio of Magnet torque and reluctance torque, On the basis of not producing irreversible demagnetization, the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111 and the second Magnet are inserted Enter the fixing magnetic force Magnet 222 in groove the 2121, the 3rd Magnet insertion groove 2131c thinning at the thickness of the direction of magnetization, both can subtract The volume of few Magnet, reduces the cost of Magnet, can improve again the efficiency of motor 10, the performance of lifting motor 10.
Wherein, according to one embodiment of present invention, permanent magnet 22 includes variable magnetic force Magnet 221 and fixing magnetic force Magnet 222, it is provided with variable magnetic force Magnet 221, the second Magnet insertion groove 2121 and the 3rd Magnet in the first Magnet insertion groove 2111 and inserts Fixing magnetic force Magnet 222 it is respectively equipped with in groove 2131c.Alternatively, the second Magnet insertion groove 2121 and the 3rd Magnet insertion groove The coercivity of the fixing magnetic force Magnet 222 in 2131c is equal, it is possible to achieve the continuous change of the total magnetic flux of permanent magnet 22, from And motor can be improved according to total flux of interlinkage of armature winding in the operating condition change motor stator of motor 10 10 from the efficiency of the operating frequency on a large scale of low-speed region to high-speed region, and then improves the performance of motor 10.
Advantageously, according to one embodiment of present invention, the first additional magnet insertion groove in the first magnet isolation tank 2112, it is provided with, The second additional magnet insertion groove, the first additional magnet insertion groove and the second additional magnet insertion groove it is provided with in second magnet isolation tank 2122 Inside it is respectively equipped with permanent magnet 22.By the both sides of the permanent magnet 22 in the first Magnet insertion groove 2111 are additional, permanent magnet is set 22, the both sides of the permanent magnet 22 in the second Magnet insertion groove 2121 are additional arranges permanent magnet 22, can make and motor rotor In the first Magnet insertion groove 2111 that the d axle of 20 is orthogonal the permanent magnet 22 of configuration magnetic flux and with the d axle of motor rotor 20 The d axle that the magnetic flux of the permanent magnet 22 configured in the second orthogonal Magnet insertion groove 2121 all concentrates on motor rotor 20 is attached Closely, the beneficially efficiency of raising motor 10, thus the performance of lifting motor 10.
Specifically, permanent magnet 22 includes variable magnetic force Magnet 221 and fixing magnetic force Magnet 222, the first Magnet insertion groove 2111 and first are provided with variable magnetic force Magnet 221 in additional magnet insertion groove, the i.e. first Magnet insertion groove 2111 and be positioned at first The coercivity of the permanent magnet 22 arranged in the first additional magnet insertion groove of Magnet insertion groove 2111 both sides can be equal, the second magnetic Fixing magnetic force Magnet 222, the i.e. second Magnet insertion groove it is respectively equipped with in ferrum insertion groove 2121 and the second additional magnet insertion groove The coercivity of 2121 permanent magnets 22 arranged with the second additional magnet insertion groove being positioned at the second Magnet insertion groove 2121 both sides Can be equal.
The variable magnetic force configured in so can making the first Magnet insertion groove 2111 orthogonal with the d axle of motor rotor 20 The fixing magnetic force of configuration in the magnetic flux of Magnet 221 and the second Magnet insertion groove 2121 orthogonal with the d axle of motor rotor 20 The magnetic flux of Magnet 222 all concentrates near the d axle of motor rotor 20, beneficially the performance of lifting motor 10.
Certainly, the present invention is not limited to this, and permanent magnet 22 includes variable magnetic force Magnet 221 and fixing magnetic force Magnet 222, the Different permanent magnet 22 it is respectively equipped with in one Magnet insertion groove 2111 and the first additional magnet insertion groove.Such as, motor rotor 20 The first Magnet insertion groove 2111 in be provided with variable magnetic force Magnet 221, and be positioned at the first of the first Magnet insertion groove 2111 both sides Fixing magnetic force Magnet 222 can be respectively equipped with in additional magnet insertion groove, thus realize the continuous of the total magnetic flux of permanent magnet 22 Change.
Motor rotor 20 according to embodiments of the present invention, by the ratio of the torque that lifting is obtained because of electromagnetic action, And reduce the permanent magnet 22 thickness in the direction of magnetization so that it is under lower Magnet torque, still can obtain in correlation technique The equal torque of motor rotor, obtain from the nominal torque characteristic of low rotation speed area to medium speed region with from medium speed district Rated power characteristic in territory to high speed area, this motor rotor 20 can apply armature in needs suppression high-speed region In the motor 10 of the induced voltage that spiral causes.
Motor rotor 20 according to embodiments of the present invention is specifically described below in conjunction with multiple embodiments.
Embodiment one
As it is shown in figure 1, in the present embodiment, the body 21 of motor rotor 20a has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211a and the second Magnet groove 212a, wherein, the outer edge of the first Magnet groove 211a adjacent body 21 is arranged, the second Magnet groove 212a adjacent body 21 centrally disposed, the first Magnet groove 211a includes a first Magnet insertion groove 2111a and is located at first The first magnet isolation tank 2112a at the two ends of Magnet insertion groove 2111a, the second Magnet groove 212a include a second Magnet insertion groove 2121a and be located at the second magnet isolation tank 2122a at two ends of the second Magnet insertion groove 2121a, the first Magnet insertion groove 2111a's is right The axis of symmetry claiming axis and the second Magnet insertion groove 2121a overlaps.Wherein, the first magnet isolation tank 2112a and the foreign steamer of body 21 Magnetic bridge width T1 between exterior feature is more than the magnetic bridge width T2 between the second magnet isolation tank 2122a and the outline of body 21, the first magnetic It is provided with variable magnetic force Magnet 221 in ferrum insertion groove 2111a, in the second Magnet insertion groove 2121a, is provided with fixing magnetic force Magnet 222, It is located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111a and is located in the second Magnet insertion groove 2121a The length of fixing magnetic force Magnet 222 is equal.
Embodiment two
As in figure 2 it is shown, in the present embodiment, the body 21 of motor rotor 20b has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211b and the second Magnet groove 212b, wherein, the outer edge of the first Magnet groove 211b adjacent body 21 is arranged, the second Magnet groove 212b adjacent body 21 centrally disposed, the first Magnet groove 211b includes a first Magnet insertion groove 2111b and is located at first The first magnet isolation tank 2112b at the two ends of Magnet insertion groove 2111b, the second Magnet groove 212b include a second Magnet insertion groove 2121b and be located at the second magnet isolation tank 2122b at two ends of the second Magnet insertion groove 2121b, the first Magnet insertion groove 2111b's is right The axis of symmetry claiming axis and the second Magnet insertion groove 2121b overlaps.Wherein, the first magnet isolation tank 2112b and the foreign steamer of body 21 Magnetic bridge width T1 between exterior feature is more than the magnetic bridge width T2 between the second magnet isolation tank 2122b and the outline of body 21.
Each first Magnet groove 211b also includes two additional magnet isolation tank 2113b, two additional magnet isolation tank 2113b neighbours respectively The two ends of nearly first Magnet insertion groove 2111b arrange and are positioned at the outside of the first Magnet insertion groove 2111b, two additional magnet isolation tanks 2113b respectively along the circumferentially extending of body 21 and between two the first magnet isolation tank 2112b, each additional magnet isolation tank 2113b It is connected with the first neighbouring magnet isolation tank 2112b and turns on respectively.
It is provided with variable magnetic force Magnet 221 in first Magnet insertion groove 2111b, is provided with solid in the second Magnet insertion groove 2121b Determine magnetic force Magnet 222, be located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111b and be located at the second Magnet The length of the fixing magnetic force Magnet 222 in insertion groove 2121b is equal.
Embodiment three
As it is shown on figure 3, in the present embodiment, the body 21 of motor rotor 20b has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211b and the second Magnet groove 212b, wherein, the outer edge of the first Magnet groove 211b adjacent body 21 is arranged, the second Magnet groove 212b adjacent body 21 centrally disposed, the first Magnet groove 211b includes a first Magnet insertion groove 2111b and is located at first The first magnet isolation tank 2112b at the two ends of Magnet insertion groove 2111b, the second Magnet groove 212b include a second Magnet insertion groove 2121b and be located at the second magnet isolation tank 2122b at two ends of the second Magnet insertion groove 2121b, the first Magnet insertion groove 2111b's is right The axis of symmetry claiming axis and the second Magnet insertion groove 2121b overlaps.Wherein, the first magnet isolation tank 2112b and the foreign steamer of body 21 Magnetic bridge width T1 between exterior feature is less than the magnetic bridge width T2 between the second magnet isolation tank 2122b and the outline of body 21.
Each first Magnet groove 211b also includes two additional magnet isolation tank 2113b, two additional magnet isolation tank 2113b neighbours respectively The two ends of nearly first Magnet insertion groove 2111b arrange and are positioned at the outside of the first Magnet insertion groove 2111b, two additional magnet isolation tanks 2113b respectively along the circumferentially extending of body 21 and between two the first magnet isolation tank 2112b, each additional magnet isolation tank 2113b Disconnect with the first neighbouring magnet isolation tank 2112b respectively.
It is provided with variable magnetic force Magnet 221 in first Magnet insertion groove 2111b, is provided with solid in the second Magnet insertion groove 2121b Determine magnetic force Magnet 222, be located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111b and be located at the second Magnet The length of the fixing magnetic force Magnet 222 in insertion groove 2121b is equal.
Embodiment four
As shown in Figure 4, in the present embodiment, the body 21 of motor rotor 20a has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211a and the second Magnet groove 212a, wherein, the outer edge of the first Magnet groove 211a adjacent body 21 is arranged, the second Magnet groove 212a adjacent body 21 centrally disposed, the first Magnet groove 211a includes a first Magnet insertion groove 2111a and is located at first The first magnet isolation tank 2112a at the two ends of Magnet insertion groove 2111a, the second Magnet groove 212a include a second Magnet insertion groove 2121a and be located at the second magnet isolation tank 2122a at two ends of the second Magnet insertion groove 2121a, the first Magnet insertion groove 2111a's is right The axis of symmetry claiming axis and the second Magnet insertion groove 2121a overlaps.Wherein, the first magnet isolation tank 2112a and the foreign steamer of body 21 Magnetic bridge width T1 between exterior feature is more than the magnetic bridge width T2 between the second magnet isolation tank 2122a and the outline of body 21.
It is provided with variable magnetic force Magnet 221 in first Magnet insertion groove 2111a, is provided with solid in the second Magnet insertion groove 2121a Determine magnetic force Magnet 222, be located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111a less than being located at the second magnetic The length of the fixing magnetic force Magnet 222 in ferrum insertion groove 2121a.It is respectively equipped with additional magnet in each first magnet isolation tank 2112a Variable magnetic force Magnet 221 it is provided with in insertion groove, and additional magnet insertion groove.
Embodiment five
As it is shown in figure 5, in the present embodiment, the body 21 of motor rotor 20a has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes two Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211a and the second Magnet groove 212a, wherein, the outer edge of the first Magnet groove 211a adjacent body 21 is arranged, the second Magnet groove 212a adjacent body 21 centrally disposed, the first Magnet groove 211a includes a first Magnet insertion groove 2111a and is located at first The first magnet isolation tank 2112a at the two ends of Magnet insertion groove 2111a, the second Magnet groove 212a include a second Magnet insertion groove 2121a and be located at the second magnet isolation tank 2122a at two ends of the second Magnet insertion groove 2121a, the first Magnet insertion groove 2111a's is right The axis of symmetry claiming axis and the second Magnet insertion groove 2121a overlaps.Wherein, the first magnet isolation tank 2112a and the foreign steamer of body 21 Magnetic bridge width T1 between exterior feature is more than the magnetic bridge width T2 between the second magnet isolation tank 2122a and the outline of body 21.
It is provided with variable magnetic force Magnet 221 in first Magnet insertion groove 2111a, is provided with solid in the second Magnet insertion groove 2121a Determine magnetic force Magnet 222, be located at the length of the variable magnetic force Magnet 221 in the first Magnet insertion groove 2111a less than being located at the second magnetic The length of the fixing magnetic force Magnet 222 in ferrum insertion groove 2121a.It is respectively equipped with additional magnet in each first magnet isolation tank 2112a Insertion groove, is provided with fixing magnetic force Magnet 222 in additional magnet insertion groove.
Embodiment six
As shown in Figure 6, in the present embodiment, the body 21 of motor rotor 20c has multiple along its circumferentially spaced cloth The Magnet groove group put, each Magnet groove group includes three Magnet grooves being radially spaced layout along body 21, the i.e. first Magnet Groove 211c, the second Magnet groove 212c and the 3rd Magnet groove 213c, wherein, the outer edge of the first Magnet groove 211c adjacent body 21 sets Putting, the 3rd Magnet groove 213c adjacent body 21 centrally disposed, the second Magnet groove 212c is located at the first Magnet groove 211c and the 3rd Between Magnet groove 213c, the first Magnet groove 211c includes a first Magnet insertion groove 2111c and is located at the first Magnet insertion groove The first magnet isolation tank 2112c at the two ends of 2111c, the second Magnet groove 212c include a second Magnet insertion groove 2121c and are located at The second magnet isolation tank 2122c at the two ends of the second Magnet insertion groove 2121c, the 3rd Magnet groove 213c include that the 3rd Magnet inserts Groove 2131c and be located at the 3rd magnet isolation tank 2132c at two ends of the 3rd Magnet insertion groove 2131c, the first Magnet insertion groove 2111c's The axis of symmetry, the axis of symmetry of the second Magnet insertion groove 2121c and the 3rd Magnet insertion groove 2131c overlap.First magnet isolation tank Magnetic bridge width between the outline of 2112c and body 21, the magnetic bridge between the second magnet isolation tank 2122c and the outline of body 21 Magnetic bridge width between width, the 3rd magnet isolation tank 2132c and the outline of body 21 is equal.
Variable magnetic force Magnet 221, the second Magnet insertion groove 2121c and the 3rd magnetic it is provided with in first Magnet insertion groove 2111c It is respectively equipped with fixing magnetic force Magnet 222 in ferrum insertion groove 2131c, is located at the variable magnetic force magnetic in the first Magnet insertion groove 2111c The length of ferrum 221, less than the length of the fixing magnetic force Magnet 222 being located in the second Magnet insertion groove 2121c, is located at the second Magnet The length of the variable magnetic force Magnet 221 in insertion groove 2121c is less than being located at the fixing magnetic force magnetic in the 3rd Magnet insertion groove 2131c The length of ferrum 222.Being respectively equipped with the first additional magnet insertion groove in each first magnet isolation tank 2112c, the first additional magnet is inserted It is provided with variable magnetic force Magnet 221 in groove, in each second magnet isolation tank 2122c, is respectively equipped with the second additional magnet insertion groove, second Fixing magnetic force Magnet 222 it is provided with in additional magnet insertion groove.
Thus, motor rotor 20c according to embodiments of the present invention, multiple have by arranging on the body 21 of rotor Along the Magnet groove group of the multiple Magnet grooves being radially spaced layout of body 21, and in Magnet groove, configure suitable permanent magnet 22, thus it is possible to vary the magnetic flux of permanent magnet 22 so that the magnetic flux of the permanent magnet 22 in each Magnet groove group is synthetically formed electronic In the total magnetic flux of machine rotor 20c can change motor stator according to the operating condition of motor 10, the total of armature winding interlinks Magnetic flux, thus improve the efficiency of the motor 10 operating frequency on a large scale from low-speed region to high-speed region, and then improve electricity The performance of motivation 10.
The motor 10 of embodiment according to a second aspect of the present invention, including the motor rotor 20 according to above-described embodiment. Owing to motor rotor 20 according to embodiments of the present invention has above-mentioned technique effect, therefore, the motor 10 of the application also has Having an above-mentioned technique effect, the i.e. simple in construction of this motor 10, each parts connect reliable, are convenient to mount and dismount, processing, easy to manufacture, Work efficiency is high, and performance is good.
Specifically describe embodiment compressor 100 according to a third aspect of the present invention below in conjunction with the accompanying drawings.
The compressor 100 of embodiment includes the motor 10 according to above-described embodiment according to a third aspect of the present invention.Specifically Ground, as it is shown in fig. 7, compressor 100 is mainly made up of casing 30, motor 10 and cylinder 40, wherein, casing 30 is formed along vertically The column that direction (above-below direction as shown in Figure 7) extends, defines along its axially extended receiving chamber 31 in casing 30, electronic In machine 10 and cylinder 40 receiving chamber 31 the most arranged spaced apart respectively.
Owing to the motor 10 of the embodiment of the present invention has above-mentioned technique effect, therefore, pressure according to embodiments of the present invention Contracting machine 100 also has above-mentioned technique effect, the i.e. simple in construction of this compressor 100, and each parts connect reliable, are convenient to mount and dismount, add Work, easy to manufacture, production efficiency is high, and efficiency is high, and performance is good.
Other of motor 10 according to embodiments of the present invention and compressor 100 are constituted and operation is general for this area It is all known for logical technical staff, is not detailed herein.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time Pin ", the orientation of the instruction such as " counterclockwise " or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of Describe the present invention and simplification description rather than instruction or the device of hint indication or element must have specific orientation, Yi Te Fixed azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more, Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc. Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；It can be machine Tool connects, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units Connection within part.For the ordinary skill in the art, can understand that above-mentioned term is at this as the case may be Concrete meaning in bright.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score Can include that the first and second features directly contact, it is also possible to include that the first and second features are not directly contact but by it Other characterisation contact between.And, fisrt feature second feature " on ", " top " and " above " include that first is special Levy directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " below " include that fisrt feature directly over second feature and oblique upper, or is merely representative of Fisrt feature level height is less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example Property, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is without departing from the principle of the present invention and objective In the case of above-described embodiment can be changed within the scope of the invention, revise, replace and modification.

Claims (20)

1. a motor rotor, it is characterised in that including:
Body, described body have multiple along its axially through and along the Magnet groove group of its circumferentially spaced layout, each described Magnet groove group includes at least two Magnet groove being radially spaced layout along described body respectively, and each described Magnet groove is respectively Including Magnet insertion groove and magnet isolation tank, described Magnet insertion groove extends along the d direction of principal axis being perpendicular to described body, described magnet isolation tank Being located at the two ends of described Magnet insertion groove and turn on described Magnet insertion groove, described magnet isolation tank is along the q direction of principal axis of described body Stretch out；
Multiple permanent magnets, multiple described permanent magnets are plugged in multiple described Magnet groove respectively, at described body radially, position In the described Magnet insertion groove of the inner circumferential of described body, the coercivity of the described permanent magnet of grafting is more than being positioned at described body The coercivity of the described permanent magnet of grafting in the described Magnet insertion groove of periphery.
Motor rotor the most according to claim 1, it is characterised in that each described Magnet groove group includes respectively along described The first Magnet groove being radially spaced layout of body and the second Magnet groove, described first Magnet groove is positioned at described second Magnet groove Outside, described first Magnet groove includes that the first Magnet insertion groove and the first magnet isolation tank, described second Magnet groove include the second magnetic Ferrum insertion groove and the second magnet isolation tank.
Motor rotor the most according to claim 2, it is characterised in that described permanent magnet includes that variable magnetic force Magnet is with solid Determining magnetic force Magnet, described variable magnetic force Magnet is located in described first Magnet insertion groove, and described fixing magnetic force Magnet is located at described In second Magnet insertion groove.
Motor rotor the most according to claim 3, it is characterised in that each described variable magnetic force Magnet is along being perpendicular to institute The width of the direction extension stating d axle is W1, the width that each described fixing magnetic force Magnet extends along the direction being perpendicular to described d axle Meet for W2, described W1 and described W2: 0.5W2 W1 1.5W2.
Motor rotor the most according to claim 3, it is characterised in that described fixing magnetic force Magnet is by heavy rare earth element dysprosium Content is that province's dysprosium rare earth sintering of 0WT% to 4WT% is formed.
Motor rotor the most according to claim 2, it is characterised in that described first magnet isolation tank and the foreign steamer of described body Magnetic bridge width between exterior feature is T1, and the magnetic bridge width between described second magnet isolation tank and the outline of described body is T2, described T1 Yu T2 meets: T1 T2.
Motor rotor the most according to claim 6, it is characterised in that described body is by multiple electromagnetic steel plate superposition shapes Becoming, described T2 is more than the thickness of each described electromagnetic steel plate.
Motor rotor the most according to claim 2, it is characterised in that each described first Magnet groove also include two attached Adding magnet isolation tank, two described additional magnet isolation tanks are respectively adjacent to the two ends setting of described first Magnet insertion groove and are positioned at described first The outside of Magnet insertion groove, two described additional magnet isolation tanks are respectively along the circumferentially extending of described body and be positioned at two described first Between magnet isolation tank.
Motor rotor the most according to claim 8, it is characterised in that each described additional magnet isolation tank is respectively with neighbouring Described first magnet isolation tank is connected or disconnects.
Motor rotor the most according to claim 3, it is characterised in that be respectively equipped with in each described first magnet isolation tank Additional magnet insertion groove, is provided with permanent magnet in described additional magnet insertion groove.
11. motor rotors according to claim 10, it is characterised in that be provided with described in described additional magnet insertion groove Variable magnetic force Magnet or described fixing magnetic force Magnet.
12. motor rotors according to claim 11, it is characterised in that the institute in each described first Magnet insertion groove The width stating the direction extension that variable magnetic force Magnet edge is perpendicular to described d axle is W3, in each described second Magnet insertion groove The width that described fixing magnetic force Magnet extends along the direction being perpendicular to described d axle is W4, and described W3 and described W4 meets: 0.25W4 ≦W3≦W4。
13. motor rotors according to claim 1, it is characterised in that each described Magnet groove group includes respectively along institute That states body is radially spaced the first Magnet groove of layout, the second Magnet groove and the 3rd Magnet groove, and described first Magnet groove is positioned at The outside of described second Magnet groove, described second Magnet groove is positioned at the outside of described 3rd Magnet groove, described first Magnet groove bag Including the first Magnet insertion groove and the first magnet isolation tank, described second Magnet groove includes the second Magnet insertion groove and the second magnet isolation tank, institute State the 3rd Magnet groove and include the 3rd Magnet insertion groove and the 3rd magnet isolation tank.
14. motor rotors according to claim 13, it is characterised in that described permanent magnet include variable magnetic force Magnet and Fixing magnetic force Magnet, is provided with described variable magnetic force Magnet, described second Magnet insertion groove and institute in described first Magnet insertion groove Described fixing magnetic force Magnet it is respectively equipped with in stating the 3rd Magnet insertion groove.
15. motor rotors according to claim 14, it is characterised in that described second Magnet insertion groove and the described 3rd The coercivity of the described fixing magnetic force Magnet in Magnet insertion groove is equal.
16. motor rotors according to claim 13, it is characterised in that be provided with first in described first magnet isolation tank and add Magnet insertion groove, is provided with the second additional magnet insertion groove, described first additional magnet insertion groove and in described second magnet isolation tank It is respectively equipped with permanent magnet in two additional magnet insertion grooves.
17. motor rotors according to claim 16, it is characterised in that described permanent magnet include variable magnetic force Magnet and Fixing magnetic force Magnet, is provided with described variable magnetic force magnetic in described first Magnet insertion groove and described first additional magnet insertion groove It is respectively equipped with described fixing magnetic force Magnet in ferrum, described second Magnet insertion groove and described second additional magnet insertion groove.
18. motor rotors according to claim 16, it is characterised in that described permanent magnet include variable magnetic force Magnet and Fixing magnetic force Magnet, is respectively equipped with different permanent magnet in described first Magnet insertion groove and described first additional magnet insertion groove.
19. 1 kinds of motor, it is characterised in that include the motor rotor according to any one of claim 1-18.
20. 1 kinds of compressors, it is characterised in that include the motor described in claim 19.
CN201610514012.5A 2016-06-30 2016-06-30 Motor rotor and motor, compressor with it Active CN105978198B (en)

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