CN206962564U - Motor rotor, motor and DC frequency-changeable compressor - Google Patents
Motor rotor, motor and DC frequency-changeable compressor Download PDFInfo
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- CN206962564U CN206962564U CN201720725871.9U CN201720725871U CN206962564U CN 206962564 U CN206962564 U CN 206962564U CN 201720725871 U CN201720725871 U CN 201720725871U CN 206962564 U CN206962564 U CN 206962564U
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Abstract
The utility model provides a kind of motor rotor,Motor and DC frequency-changeable compressor,Increase flux in the rotor core of motor rotor and arrange groove,So that flux arranges forms magnetic bridge between groove and magnet isolation tank,And the spacing that flux is arranged between groove and magnet isolation tank causes magnetic bridge to form magnetic saturation,Then so that magnetic resistance significantly increases at this,It is similar to air reluctance,According to magnetic resistance minimum principle,I.e. magnetic flux always closes along the minimum path of magnetic resistance,The magnetic line of force will be passed through by limiting from magnetic bridge,Now flux arranges groove,Magnetic bridge,Magnet isolation tank magnetic resistance is suitable,Together decide on pole embrace,So as to ensure between magnet isolation tank and rotor core edge on the basis of the mechanical strength of magnetic magnetic bridge,Pole embrace is set in the larger context,Be advantageous to design optimal pole embrace,And then obtain optimal pole embrace,Its no-load back electromotive force percent harmonic distortion can be reduced,Cogging torque and torque pulsation,Improve Motor Control ability,Reduce motor noise vibration.
Description
Technical field
It the utility model is related to motor and DC frequency-changeable compressor technical field, more particularly to a kind of motor rotor,
Motor and DC frequency-changeable compressor.
Background technology
Compressor is the core devices of the electrical equipment such as air-conditioning, refrigerator, and compressor majority is driven by motor, is had
There is larger energy input.With the progress of society and the continuous sternnessization of Energy situation, related industry is endeavoured more and more
In some energy-saving products of release.In recent years, DC Frequency Conversion Technology turns into one of leading technology of refrigeration industry, together
When, permasyn morot also turns into the first choice of electric motor for compressor.
DC frequency-changeable compressor is made up of with permasyn morot stator and rotor, and stator is affixed in compressor,
And the rotor in compressor has permanent magnet, the parts such as piston are driven to carry out the compressed of refrigerant using eccentric shaft design
Journey.Existing DC frequency-changeable compressor typically uses embedded rotor, the structure of its rotor core 100 with permasyn morot
As shown in figure 1, optimizing pole embrace by designing the length L of suitable magnet isolation tank 101 in rotor core 100, can drop
Low motor no-load counter electromotive force harmonic wave, cogging torque and torque pulsation, so as to improve Motor Control and noise vibration,
It is the width every magnetic magnetic bridge that interval between magnet isolation tank 101 and rotor core frontside edge, which is formed every magnetic magnetic bridge, W, but for external diameter
Rotor larger, magnet dosage is more, the setting range of pole embrace are easily limited by every magnetic magnetic bridge mechanical strength so that
It is more difficult to design optimal pole embrace.
Utility model content
The purpose of this utility model is to provide a kind of motor rotor, motor and DC frequency-changeable compressor, Neng Gou
Ensure to design optimal pole embrace on the basis of the mechanical strength of magnetic magnetic bridge between magnet isolation tank and rotor core edge, and then
Improve the performance of motor and the DC frequency-changeable compressor using the motor.
To solve the above problems, the utility model proposes a kind of motor rotor, the rotor core of the motor rotor
On be disposed with magnet groove, magnet isolation tank, flux arrange groove, the magnet groove is used for embedded fixed installation permanent magnet, described every magnetic
Groove is connected to the magnet groove close to the end of the rotor core edge, the magnet isolation tank and the edge of the rotor core
Between be every magnetic magnetic bridge, the flux arranges the side that groove be located at the magnet isolation tank, and the flux arranges groove and described every magnetic
Separately and magnetic bridge is formed between groove, and the flux arranges groove and the spacing of the magnet isolation tank causes the magnetic bridge formation magnetic to satisfy
With.
Further, the flux arrange shape of the groove close to the rotor core edge be semicircle, arc section or
Straight line.
Further, the minimum widith b of the magnetic bridge and the width W every magnetic magnetic bridge relation are：0.5W≤b≤
2W。
Further, the width a and the magnetic bridge of the flux arrangement groove minimum widith b relations are：0.5b≤a≤
2b。
Further, the flux arranges the beeline c at groove and the rotor core edge with described every magnetic magnetic bridge
Width W relation is 0.5W≤c≤2W.
Further, the flux arranges groove and be arranged in parallel with the magnet isolation tank, or flux arrangement groove with it is described
The angle of magnet isolation tank is acute angle.
Further, the rotor core of the rotor is led to provided with multiple along the refrigerant being circumferentially arranged of the rotor core
Hole, and it is communicated with an oil return through-hole on the outside of at least one radial direction of refrigerant through hole along the rotor core.
Further, length d1 of the oil return through-hole in the rotor core circumference meets d1≤d/2, at described turn
Sub unshakable in one's determination length d2 radially meets refrigerant through hole that d2 >=d/16, wherein d are oil return through-hole connection in the rotor
Length in circumference unshakable in one's determination.
Further, the rotor core includes the rotor punching of same shape, and is built up by the rotor punching.
The utility model also provides a kind of motor, including stator and above-mentioned motor rotor, the motor rotor
It is arranged in the stator and is rotated by rotating shaft.
The utility model also provides a kind of DC frequency-changeable compressor, including above-mentioned motor.
Compared with prior art, motor rotor of the present utility model, increase flux arrangement groove in its rotor core, make
Obtain and magnetic bridge is formed between flux arrangement groove and magnet isolation tank, and the spacing that flux is arranged between groove and magnet isolation tank causes magnetic bridge to form magnetic
Saturation, then make it that magnetic resistance significantly increases at this, be similar to air reluctance, according to magnetic resistance minimum principle, i.e., magnetic flux is always along magnetic
The minimum path closure of resistance, the magnetic line of force will be limited from magnetic bridge by, now it is suitable to arrange groove, magnetic bridge, magnet isolation tank magnetic resistance for flux,
Pole embrace will be together decided on, so as in the base for ensureing the mechanical strength every magnetic magnetic bridge between magnet isolation tank and rotor core edge
On plinth so that pole embrace can be set in the larger context, be advantageous to design optimal pole embrace, and then obtain most
Excellent pole embrace；Motor of the present utility model, due to using motor rotor of the present utility model, it is thus possible to it is empty to reduce it
Counter electromotive force percent harmonic distortion, cogging torque and torque pulsation are carried, improves Motor Control ability, motor noise is reduced and shakes
It is dynamic；DC frequency-changeable compressor of the present utility model, due to using the motor, performance greatly improves.
Brief description of the drawings
Fig. 1 is the structural representation of the rotor core of existing DC frequency-changeable compressor permasyn morot；
Fig. 2 is the rotor core structural representation of the motor rotor of the utility model embodiment one；
Fig. 3 is the rotor core structural representation of the motor rotor of the utility model embodiment two.
Embodiment
To become apparent the purpose of this utility model, feature, below in conjunction with the accompanying drawings to of the present utility model specific real
The mode of applying is further described, however, the utility model can use different form to realize, should not be confined to described in
Embodiment.
Embodiment one
The present embodiment provides a kind of motor rotor, and the rotor core 1 of the motor rotor includes turning for same shape
Sub- punching, and by folded riveting or structure as shown in Figure 2 is welded to form by the rotor punching, wherein, in the rotor core 1
Be disposed with magnet groove 2, magnet isolation tank 3 and flux arrange groove 4, the magnet groove 2 is used for embedded fixed installation permanent magnet, it is described every
Magnetic groove 3 is connected to the magnet groove 2 close to the end of the edge of rotor core 1, the magnet isolation tank 3 and the rotor core
It is every magnetic magnetic bridge 5 between 1 edge, the flux arranges groove 4 and is set in parallel in the side of the magnet isolation tank 3 and turns close to described
Sub edge unshakable in one's determination, and separately and magnetic bridge 6 is formed between flux arrangement groove 4 and the magnet isolation tank 3, the flux arranges
The spacing of groove 4 and the magnet isolation tank 3 causes the magnetic bridge 6 to form magnetic saturation.Flux arranges groove 4 close to the edge of rotor core 1
Shape can be semicircle either arc section or straight line.
The width defined every magnetic magnetic bridge 5 is W, and the width that flux arranges groove 4 is a, and the minimum widith of magnetic bridge 6 is b, and flux arranges
The beeline of groove 4 and the edge of rotor core 1 is c, and a, b, c, W meet following relation condition：
1) 0.5w≤b≤2w, 2) 0.5b≤a≤2b, 3) 0.5w≤c≤2w.
In addition, the rotor core 1 typically connects shape by other parts of the fasteners such as rivet and motor rotor
Into the motor rotor.
Using the motor rotor of the present embodiment, flux arranges groove 4 and the spacing of magnet isolation tank 3 is smaller, magnetic bridge 6 between the two
Forming magnetic saturation so that magnetic resistance significantly increases at this, is similar to air reluctance, according to magnetic resistance minimum principle, i.e. magnetic flux always edge
The minimum path closure of magnetic resistance, the limitation magnetic line of force is passed through from magnetic bridge 6.Now, flux arranges groove 4, magnetic bridge 6, the magnetic resistance of magnet isolation tank 3
Quite, pole embrace will be together decided on, so as to ensure on the basis of the mechanical strength of magnetic magnetic bridge 5 so that pole embrace can
Set in the larger context, be advantageous to design optimal pole embrace abnormal to reduce the no-load back electromotive force harmonic wave of motor
Variability THD, cogging torque T0 and torque pulsation Tk, Motor Control ability is improved, reduce motor noise vibration.Meanwhile
Flux arrange groove 4 set can also balancing motor d, q axle inductance, reduce the reluctance torque of motor, further reduce
The torque pulsation of motor.
It should be noted that magnet groove 2 can be straight-line groove, and permanent magnet is caused to be orthogonal to the diametric(al) of rotor core 1
Place；Magnet groove 2 can also be V-groove, full so as to improve motor torque density to improve the dosage of embedded permanent magnet
Sufficient motor is efficient, small form factor requirements.
In addition, the center of the rotor core 1 is provided with the shaft hole 7 for being used for installing rotating shaft, and leaned in the rotor core 1
It is provided with the n refrigerant through holes 8 being circumferentially arranged along rotor core 1 at nearly shaft hole 7, the specifications of all refrigerant through holes 8 (including shape
Shape, size) can be with not quite identical, the shape of refrigerant through hole 8 can be circle, ellipse, arc, arc or square with line segment
Shape, further, the outside of radial direction of the individual refrigerant through holes 8 of k (k≤n) along rotor core 1 wherein is set respectively and institute
State the oil return through-hole 9 of the connection of refrigerant through hole 8, the shape of oil return through-hole 9 be semicircle, semiellipse, arc, the arc with line segment or
Rectangle, length d1 of the oil return through-hole 9 in the circumference of rotor core 1 meet d1≤d/2, oil return through-hole 9 in rotor core 1 radially
Length d2 meet d2 >=d/16, wherein d is the length of refrigerant through hole 8 that oil return through-hole 9 connects in the circumference of rotor core 1.
Such as in Fig. 2, refrigerant through hole 8 includes the relatively large refrigerant through hole 82 of the relatively small refrigerant through hole 81 of radius and radius,
The outside of radial direction of the relatively large refrigerant through hole 82 of radius along rotor core 1 is set and relatively large cold of the radius
The oil return through-hole 9 that matchmaker's through hole 82 connects.Due to being provided with the oil return through-hole 9 of connection refrigerant through hole 8 in rotor core 1, can make
Rotor rotation when refrigerant through hole 8 in partly atomized and the refrigerator oil that is dissolved in cold media gas got rid of in the presence of radial load
Fallen after rise at oil return through-hole 9 and along oil return through-hole 9, the refrigerator oil for being brought into motor top is reduced, so as to reduce compressor
Oil yield, ensure the lubricity of the pump housing.
The present embodiment also provides a kind of motor, including stator and above-mentioned motor rotor, the motor rotor lead to
Rotating shaft is crossed to rotate in the stator.
The present embodiment also provides a kind of DC frequency-changeable compressor, including above-mentioned motor.
In a practical application, in the rotor core of the motor rotor that groove is arranged without flux as shown in Figure 1 every
The width W=0.9mm of magnetic magnetic bridge 5, using the no-load back electromotive force percent harmonic distortion THD=of the motor of the motor rotor
3.60%, cogging torque T0=0.86Nm, torque pulsation Tk=10.51%.And use identical stator but use the present embodiment
Permanent-magnet synchronous motor rotor scheme motor, i.e., on the basis of the rotor core shown in Fig. 1 increase flux arrange groove
4, it is be arranged in parallel as shown in Fig. 2 flux arranges groove 4 with magnet isolation tank 3, flux arranges the width a=1.4mm of groove 4；Flux arranges groove
The width b=1.0mm of magnetic bridge 6 between 4 and magnet isolation tank 3；It is circular arc that flux, which arranges shape of the groove 4 close to the edge of rotor core 1,
Section, and the arc section and the corresponding edge of rotor core 1 are concentric, and flux arrangement groove 4 and the corresponding edge of rotor core 1 are most
Short distance c=0.5mm.Now, the no-load back electromotive force percent harmonic distortion THD=3.19% of the motor, 11.4% is reduced；
Cogging torque T0=0.45Nm, reduce by 47.7%；Torque pulsation Tk=5.14%, reduce by 51.1%, it is clear that when the motor
During applied to DC frequency-changeable compressor, the performance of DC frequency-changeable compressor can be substantially improved.
Embodiment two
The present embodiment provides a kind of motor rotor, and the rotor core 1 of the motor rotor includes turning for same shape
Sub- punching, and by folded riveting or structure as shown in Figure 3 is welded to form by the rotor punching, wherein, in the rotor core 1
Be disposed with magnet groove 2, magnet isolation tank 3 and flux arrange groove 4, the magnet groove 2 is used for embedded fixed installation permanent magnet, it is described every
Magnetic groove 3 is connected to the magnet groove 2 close to the end of the edge of rotor core 1, the magnet isolation tank 3 and the rotor core
It is every magnetic magnetic bridge 5 between 1 edge, the flux arranges groove 4 and is arranged at the side of the magnet isolation tank 3 and close to the rotor iron
The edge of the heart, and the flux arranges at an acute angle between groove 4 and the magnet isolation tank 3, the flux arrangement groove 4 and the magnet isolation tank
Interval between 3 forms magnetic bridge 6, and the flux arranges groove 4 and the spacing of the magnet isolation tank 3 causes the magnetic bridge 6 to form magnetic and satisfy
With.It can be semicircle either arc section or straight line that flux, which arranges shape of the groove 4 close to the edge of rotor core 1,.
The width defined every magnetic magnetic bridge 5 is W, and the width that flux arranges groove 4 is a, and the minimum widith of magnetic bridge 6 is b, and flux arranges
The beeline of groove 4 and the edge of rotor core 1 is c, and a, b, c, W meet following relation condition：
1) 0.5w≤b≤2w, 2) 0.5b≤a≤2b, 3) 0.5w≤c≤2w.
In addition, the rotor core 1 typically connects shape by other parts of the fasteners such as rivet and motor rotor
Into the motor rotor.
Using the motor rotor of the present embodiment, flux arranges groove 4 and the spacing of magnet isolation tank 3 is smaller, magnetic bridge 6 between the two
Forming magnetic saturation so that magnetic resistance significantly increases at this, is similar to air reluctance, according to magnetic resistance minimum principle, i.e. magnetic flux always edge
The minimum path closure of magnetic resistance, the limitation magnetic line of force is passed through from magnetic bridge 6.Now, flux arranges groove 4, magnetic bridge 6, the magnetic resistance of magnet isolation tank 3
Quite, pole embrace will be together decided on, so as to ensure on the basis of the mechanical strength of magnetic magnetic bridge 5 so that pole embrace can
Set in the larger context, be advantageous to design optimal pole embrace abnormal to reduce the no-load back electromotive force harmonic wave of motor
Variability THD, cogging torque T0 and torque pulsation Tk, Motor Control ability is improved, reduce motor noise vibration.Meanwhile
Flux arrange groove 4 set can also balancing motor d, q axle inductance, reduce the reluctance torque of motor, further reduce
The torque pulsation of motor.
In addition, the center of the rotor core 1 of the present embodiment is provided with the shaft hole 7 for being used for installing rotating shaft, and the rotor iron
The n refrigerant through holes 8 being circumferentially arranged along rotor core 1 are provided with the heart 1 at shaft hole 7, for the refrigerant that circulates.
The present embodiment also provides a kind of motor, including stator and above-mentioned motor rotor, the motor rotor lead to
Rotating shaft is crossed to rotate in the stator.
The present embodiment also provides a kind of DC frequency-changeable compressor, including above-mentioned motor.
In a practical application, in the rotor core of the motor rotor that groove is arranged without flux as shown in Figure 1 every
The width W=0.9mm of magnetic magnetic bridge 5, using the no-load back electromotive force percent harmonic distortion THD=of the motor of the motor rotor
3.60%, cogging torque T0=0.86Nm, torque pulsation Tk=10.51%.And use identical stator but use the present embodiment
Permanent-magnet synchronous motor rotor scheme motor, i.e., on the basis of the rotor core shown in Fig. 1 increase flux arrange groove
4, as shown in figure 3, the angle that flux is arranged between groove 4 and magnet isolation tank 3 is 30 °.Flux arranges the width a=1.6mm of groove 4；Magnetic
Beam arranges the minimum widith b=0.9mm of the magnetic bridge 6 between groove 4 and magnet isolation tank 3；Flux arranges groove 4 close to the edge of rotor core 1
Shape be semicircle, the beeline c=0.5mm with the edge of rotor core 1.Now, the anti-electricity of the zero load of the motor
Kinetic potential percent harmonic distortion THD=3.22%, reduce by 10.6%；Cogging torque T0=0.72Nm, reduce by 16.3%；Torque pulsation
Tk=3.98%, reduce by 62.1%, it is clear that when the motor applications are in DC frequency-changeable compressor, direct current can be substantially improved
The performance of frequency-changeable compressor.
Obviously, it is new without departing from this practicality can to carry out various changes and modification to utility model by those skilled in the art
The spirit and scope of type.So, if these modifications and variations of the present utility model belong to the utility model claims and its
Within the scope of equivalent technologies, then the utility model is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of motor rotor, it is characterised in that magnet groove is disposed with the rotor core of the motor rotor, every magnetic
Groove, flux arrange groove, and the magnet groove is used for embedded fixed installation permanent magnet, and the magnet isolation tank is connected to the magnet groove and leaned on
The end of the nearly rotor core edge, be between the magnet isolation tank and the edge of the rotor core every magnetic magnetic bridge, it is described
Flux arranges groove and be located at the side of the magnet isolation tank, and separately and forms magnetic between flux arrangement groove and the magnet isolation tank
Bridge, the flux arranges groove and the spacing of the magnet isolation tank causes the magnetic bridge to form magnetic saturation.
2. motor rotor as claimed in claim 1, it is characterised in that the flux arranges groove close to the rotor core side
The shape of edge is semicircle, arc section or straight line.
3. motor rotor as claimed in claim 1, it is characterised in that the minimum widith b of the magnetic bridge with it is described every magnetic magnetic
The width W of bridge relation is：0.5W≤b≤2W.
4. the motor rotor as described in claim 1 or 3, it is characterised in that the flux arranges the width a of groove and the magnetic
The minimum widith b relations of bridge are：0.5b≤a≤2b.
5. motor rotor as claimed in claim 1, it is characterised in that the flux arranges groove and the rotor core edge
Beeline c and the width W every magnetic magnetic bridge relation be 0.5W≤c≤2W.
6. motor rotor as claimed in claim 1, it is characterised in that the flux arranges that groove is parallel with the magnet isolation tank to be set
Put, or it is acute angle that the flux, which arranges groove and the angle of the magnet isolation tank,.
7. motor rotor as claimed in claim 1, it is characterised in that the rotor core of the rotor is provided with multiple along institute
State the refrigerant through hole being circumferentially arranged of rotor core, and at least one radial direction of the refrigerant through hole along the rotor core
Outside is communicated with an oil return through-hole.
8. motor rotor as claimed in claim 7, it is characterised in that the oil return through-hole is in the rotor core circumference
Length d1 meet d1≤d/2, meet that d2 >=d/16, wherein d are the oil return in the length d2 of the rotor core radially
Length of the refrigerant through hole of through hole connection in the rotor core circumference.
9. motor rotor as claimed in claim 1, it is characterised in that the rotor that the rotor core includes same shape rushes
Piece, and built up by the rotor punching.
A kind of 10. motor, it is characterised in that including the motor rotor any one of stator and claim 1 to 9,
The motor rotor is arranged in the stator by rotating shaft and rotated.
11. a kind of DC frequency-changeable compressor, it is characterised in that including the motor described in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725871.9U CN206962564U (en) | 2017-06-21 | 2017-06-21 | Motor rotor, motor and DC frequency-changeable compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725871.9U CN206962564U (en) | 2017-06-21 | 2017-06-21 | Motor rotor, motor and DC frequency-changeable compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962564U true CN206962564U (en) | 2018-02-02 |
Family
ID=61385772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720725871.9U Active CN206962564U (en) | 2017-06-21 | 2017-06-21 | Motor rotor, motor and DC frequency-changeable compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206962564U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233574A (en) * | 2018-02-13 | 2018-06-29 | 安徽明腾永磁机电设备有限公司 | Rotor and permasyn morot |
| CN109104012A (en) * | 2017-06-21 | 2018-12-28 | 上海海立电器有限公司 | Motor rotor, motor and DC frequency-changeable compressor |
-
2017
- 2017-06-21 CN CN201720725871.9U patent/CN206962564U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104012A (en) * | 2017-06-21 | 2018-12-28 | 上海海立电器有限公司 | Motor rotor, motor and DC frequency-changeable compressor |
| CN108233574A (en) * | 2018-02-13 | 2018-06-29 | 安徽明腾永磁机电设备有限公司 | Rotor and permasyn morot |
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