CN105914921B - Quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor - Google Patents
Quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor Download PDFInfo
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- CN105914921B CN105914921B CN201610244293.7A CN201610244293A CN105914921B CN 105914921 B CN105914921 B CN 105914921B CN 201610244293 A CN201610244293 A CN 201610244293A CN 105914921 B CN105914921 B CN 105914921B
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- 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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
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- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, belong to permanent magnet machine rotor technical field.The present invention be in order to solve because magneto excitation is unadjustable, when its when rated speed operates above to its weak-magnetic speed-regulating, the problem of system effectiveness being caused to reduce.It forms weak magnetic unit by sliding-rail groove, magnet isolation tank, spring and magnetic inductive block, and weak magnetic unit is located to be uniformly distributed per on the d shaft centre lines of pole and along rotor core circumferencial direction, and 2n permanent magnet axial pass trough is symmetrical at left and right sides of weak magnetic unit；The permanent magnet that an embedded shape matches in each permanent magnet axial pass trough；In addition to the adjacent permanent magnet in weak magnetic unit both sides, magnetic bridge is provided between remaining every extremely adjacent permanent magnet.The present invention is used as a kind of permanent-magnetic synchronous motor rotor structure.
Description
Technical field
The present invention relates to quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, belong to permanent magnet machine rotor technology neck
Domain.
Background technology
Magneto d-axis magnetic circuit is because pass through the very big permanent magnet of magnetic resistance, therefore d-axis inductance is less than quadrature axis inductance.Root
According to permagnetic synchronous motor torque equation, Te=p [ψfiq+(Ld-Lq)idiq], wherein TeFor permagnetic synchronous motor electromagnetic torque, p is
Motor number of pole-pairs, ψfFor magnetic linkage caused by permanent magnet, iqFor stator winding quadrature axis current, LdFor the d-axis inductance of stator winding, Lq
For the quadrature axis inductance of stator winding, idFor the direct-axis current of stator winding, when motor is run below rated speed, it is passed through smaller
Negative direct-axis current so that electromagnetic torque obtains positive permanent-magnet torque and positive reluctance torque.Because permanent magnet excitation can not
Regulation, therefore motor must carry out weak magnetic control when rated speed operates above, what traditional method was born by increasing input
D-axis demagnetizing current, make motor gas-gap field weakening using the demagnetizing effect of armature-reaction, to be equivalent to directly weaken excitation magnetic
Field reaches the purpose of weak magnetic speedup.The increase of direct-axis current necessarily causes the reduction of quadrature axis current, and according to torque equation, permanent magnetism turns
Square declines rapidly, and reluctance torque is obviously improved because direct-axis current increase but quadrature axis current reduction, therefore always
Electromagnetic torque decline rapidly.
It is described above, because permanent magnet excitation can not be adjusted, offset forever by armature-reaction caused by the d shaft currents of negative sense
Magnetic flux caused by magnet, the method for this traditional weak magnetic speedup can cause the electric current of motor to increase so that and system effectiveness reduces,
And there is the danger of irreversible demagnetization in d-axis armature-reaction magnetic flux with opposite polarity, permanent magnet caused by permanent magnet.This will limitation
The application of permagnetic synchronous motor.The formula for the preferable maximum speed that can reach when controlling and run according to motor weak magnetic,Wherein nmaxFor preferable maximum speed, ulimFor the voltage limit in dq axle systems,
UlimIt is that star meets motor maximum fundamental wave phase voltage virtual value, ilimFor the current limit value in motor dq axle systems, ilim 2=id 2+
iq 2, want to obtain higher rotating speed the d-axis inductance, it is necessary to larger.D-axis inductance is bigger, and the demagnetizing effect of armature-reaction is stronger,
Weak magnetic effect is better.But in the magneto of traditional structure, permanent magnet is connected in d-axis magnetic circuit, and permanent magnet magnetic conductance is small, directly
Axle inductance is smaller, therefore in permagnetic synchronous motor, it is unsatisfactory using above-mentioned weak magnetic method weak magnetic effect.Traditional structure is forever
For magnetic-synchro rotor as shown in fig. 6, its permanent magnet is directly embedded into rotor core groove, permanent magnet uses radial magnetizing, sets
Magnet isolation tank between permanent magnet can be used for preventing interelectrode magnetic leakage.
The content of the invention
The invention aims to solve because magneto excitation is unadjustable, when it is operated above in rated speed
To its weak-magnetic speed-regulating, the problem of system effectiveness being caused to reduce, there is provided a kind of quadrature axis inductance it is variable can adjustable magnetic permanent-magnet synchronous
Rotor.
The first technical scheme of the present invention：Quadrature axis inductance of the present invention it is variable can adjustable magnetic permagnetic synchronous motor turn
Son, it includes rotor core, and the rotor core is along the circumferential direction connected successively by 2p eccentric segmentation unshakable in one's determination to be formed, each inclined
Heart segmentation unshakable in one's determination is set for symmetry axis in specular to the midline with its footpath, and the outline midpoint of each eccentric segmentation unshakable in one's determination is gas
For stand-off distance from smallest point, the outline two-end-point of each eccentric segmentation unshakable in one's determination is air gap distance maximum point；Wherein p is that motor is extremely right
Number；
Each eccentric unshakable in one's determination segmentation it is upper close to its outline side circumferentially set 2n permanent magnet axial pass trough and 1 it is weak
Magnetic axial pass trough, n are positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, and 2n forever
Magnet axial groove is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, and is collectively forming court with weak magnetic axial pass trough
To the V-shaped of rotor core rotor shaft direction, permanent magnet is provided with each permanent magnet axial pass trough；Each weak magnetic axial pass trough
By being formed positioned at the sliding-rail groove of centre and a pair of magnet isolation tanks of the symmetrical setting in its both sides, the radical length of sliding-rail groove is longer than permanent magnetism
Body axial pass trough, its radical length extend to the outer radial direction of rotor core, and two springs and one are set in each sliding-rail groove
Individual magnetic inductive block, sliding-rail groove connect the fixing end of two springs, two springs close to the bottom surface of rotor core outline as bottom land
Free end be connected with magnetic inductive block, magnetic inductive block is identical with the radical length of permanent magnet axial pass trough, magnet isolation tank and magnetic inductive block
Radical length is identical or the radical length of magnet isolation tank is less than the radical length of magnetic inductive block, magnetic inductive block, magnet isolation tank and permanent magnet axle
It is identical to the internal diameter of groove；The d shaft centre lines for eccentric unshakable in one's determination segmentation footpath to the midline；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove, two interpolars are every magnetic flux groove with d axis centers
Line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove with corresponding permanent magnet axial pass trough.
Non-magnetic solids block is set in magnet isolation tank.
Each permanent magnet axial pass trough is in tile shape or rectangle.
Second of technical scheme of the present invention：Quadrature axis inductance of the present invention it is variable can adjustable magnetic permagnetic synchronous motor turn
Son, it includes rotor core, and the rotor core is along the circumferential direction connected successively by 2p eccentric segmentation unshakable in one's determination to be formed, each inclined
Heart segmentation unshakable in one's determination is set for symmetry axis in specular to the midline with its footpath, and the outline midpoint of each eccentric segmentation unshakable in one's determination is gas
For stand-off distance from smallest point, the outline two-end-point of each eccentric segmentation unshakable in one's determination is air gap distance maximum point；Wherein p is that motor is extremely right
Number；
Each eccentric unshakable in one's determination segmentation it is upper close to its outline side circumferentially set 2n permanent magnet axial pass trough and 1 it is weak
Magnetic axial pass trough, n are positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, and 2n forever
Magnet axial groove is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, 2n permanent magnet axial pass trough and 1 it is weak
The arragement direction of magnetic axial pass trough is vertical with d shaft centre lines, and permanent magnet is provided with each permanent magnet axial pass trough；It is each weak
Magnetic axial pass trough positioned at the sliding-rail groove of centre and a pair of magnet isolation tanks of the symmetrical setting in its both sides by forming, the radial direction length of sliding-rail groove
Degree is longer than permanent magnet axial pass trough, and its radical length extends to the outer radial direction of rotor core, and sliding-rail groove is in convex shape,
The convex shape top sets two springs and a magnetic inductive block, two bullets in rotor core outline side, each sliding-rail groove
The fixing end of spring is individually fixed at the middle both sides platform of sliding-rail groove, and the free end of two springs is connected with magnetic inductive block, leads
Magnetic patch, magnet isolation tank are identical with the radical length of permanent magnet axial pass trough；In radial direction of the d shaft centre lines for eccentric segmentation unshakable in one's determination
Line；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove, two interpolars are every magnetic flux groove with d axis centers
Line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove with corresponding permanent magnet axial pass trough.
Non-magnetic solids block is set in magnet isolation tank.
Advantages of the present invention：The present invention can lifting motor torque performance, effectively solving existing magneto excitation can not
Weak magnetism speed expansion difficulty and the demand to motor high torque (HT) performance caused by regulation.It is by sliding-rail groove, magnet isolation tank, spring and leads
Magnetic patch forms weak magnetic unit, and weak magnetic unit is located to be uniformly distributed per on the d shaft centre lines of pole and along rotor core circumferencial direction,
2n permanent magnet axial pass trough is symmetrical at left and right sides of weak magnetic unit.An embedded shape in each permanent magnet axial pass trough
The permanent magnet to match.In addition to the adjacent permanent magnet in weak magnetic unit both sides, magnetic is provided between remaining every extremely adjacent permanent magnet
Bridge, the present invention are applied to permagnetic synchronous motor.
The present invention is segmented permanent magnet, and quadrature axis magnetic circuit sets magnetic to hinder so that motor is specified by changing rotor profile
When being run below rotating speed, it can realize that d-axis inductance is more than quadrature axis inductance；Because quadrature axis inductance is variable, with the fortune of magnetic inductive block
Dynamic, quadrature axis magnetic circuit reluctance is less and less, and quadrature axis inductance is increasing；Motor of the present invention only needs when rated speed operates above
The negative direct-axis current of very little, without quadrature axis current is greatly lowered, it does not have picture again on the premise of it make use of reluctance torque
Traditional permagnetic synchronous motor reduces permanent-magnet torque like that, therefore improves torque performance, and permanent magnet does not have degaussing risk；With
The change of motor speed, by the motion of magnetic inductive block, the magnetic flux that permanent magnet is sent closes in internal rotor, realizes weak magnetic.This hair
Copper loss increase caused by the bright direct-axis current for avoiding increase and bearing, therefore electric efficiency can be improved.With traditional permagnetic synchronous motor
Compare, d-axis inductance value of the present invention is big, is advantageous to improve theoretical rotational speed peak, because quadrature axis is variable, controlling magnetic field, so forever
The magnetic linkage equivalence value that magnet is sent reduces, then the total weak magnetic effect of motor, total preferable maximum speed can be significantly better than traditional electricity
Machine.
Brief description of the drawings
Fig. 1 be quadrature axis inductance of the present invention it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor the first scheme structure
Schematic diagram；N=3；
Fig. 2 be quadrature axis inductance of the present invention it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor the first scheme structure
Schematic diagram；N=1；
Fig. 3 be quadrature axis inductance of the present invention it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor the first scheme structure
Schematic diagram；Permanent magnet axial pass trough is in tile shape；
Fig. 4 be quadrature axis inductance of the present invention it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor second scheme structure
Schematic diagram；N=3；
Fig. 5 be quadrature axis inductance of the present invention it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor second scheme structure
Schematic diagram；N=1；
Fig. 6 is the permanent-magnetic synchronous motor rotor structural representation of traditional structure.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1 to Fig. 3, quadrature axis inductance described in present embodiment
It is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it includes rotor core, and the rotor core is along the circumferential direction eccentric by 2p
Iron core is segmented the composition that connects successively, and each eccentric segmentation unshakable in one's determination is that symmetry axis is set in specular to the midline with its footpath, each
The outline midpoint of eccentric segmentation unshakable in one's determination is air gap distance smallest point, and the outline two-end-point of each eccentric segmentation unshakable in one's determination is air gap
Apart from maximum point；Wherein p is motor number of pole-pairs；
Each eccentric unshakable in one's determination segmentation it is upper close to its outline side circumferentially set 2n permanent magnet axial pass trough and 1 it is weak
Magnetic axial pass trough, n are positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, and 2n forever
Magnet axial groove is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, and is collectively forming court with weak magnetic axial pass trough
To the V-shaped of rotor core rotor shaft direction, permanent magnet 1 is provided with each permanent magnet axial pass trough；Each weak magnetic is axially logical
Groove positioned at the sliding-rail groove 2 of centre and a pair of magnet isolation tanks 3 of the symmetrical setting in its both sides by forming, the radical length length of sliding-rail groove 2
In permanent magnet axial pass trough, its radical length extends to the outer radial direction of rotor core, and two bullets are set in each sliding-rail groove 2
Spring 4 and a magnetic inductive block 5, sliding-rail groove 2 connect the fixation of two springs 4 close to the bottom surface of rotor core outline as bottom land
End, the free end of two springs 4 are connected with magnetic inductive block 5, and magnetic inductive block 5 is identical with the radical length of permanent magnet axial pass trough, every
Magnetic groove 3 is identical with the radical length of magnetic inductive block 5 or the radical length of magnet isolation tank 3 is less than the radical length of magnetic inductive block 5, magnetic inductive block
5th, magnet isolation tank 3 is identical with the internal diameter of permanent magnet axial pass trough；The d shaft centre lines for eccentric unshakable in one's determination segmentation footpath to the midline；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove 6, two interpolars are every magnetic flux groove 6 with d axles
Heart line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove 6 with corresponding permanent magnet axial pass trough.
In present embodiment, in addition to the adjacent permanent magnet axial pass trough of weak magnetic unit, per extremely adjacent permanent magnet axial direction
Magnetic bridge is provided between groove.Interpolar is set between the interpolar permanent magnet of rotor core every magnetic flux groove 6.
If the interior simply air of magnet isolation tank 3, the height of magnet isolation tank is more lower slightly than magnetic inductive block little by little, magnetic inductive block is stuck
It is fixed, and avoid imbalance caused by double swerve.If solid is placed in magnet isolation tank 3 such as stainless steel, with magnetic inductive block
Radical length it is identical.
As n=1, during p=2, include 2 plate permanent magnet axial pass troughs per pole rotor core.As shown in Figure 2.This
Kind situation, no longer sets magnetic bridge.
Embodiment two：Illustrate present embodiment with reference to Fig. 1 to Fig. 3, present embodiment is to embodiment one
It is described further, non-magnetic solids block is set in magnet isolation tank 3.
It in magnet isolation tank 3 can be air or place non-magnetic solids.
Embodiment three：Illustrate present embodiment with reference to Fig. 3, present embodiment is made to embodiment one or two
Further illustrate, each permanent magnet axial pass trough is in tile shape or rectangle.
Present embodiment is as n=1, and during p=2,4p shoe groove forms V-shaped, and the opening of the groove of V-shaped is towards turning
Sub rotor shaft direction unshakable in one's determination.
Embodiment four：Illustrate present embodiment with reference to Fig. 4 to Fig. 5, quadrature axis inductance described in present embodiment
It is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it includes rotor core, and the rotor core is along the circumferential direction eccentric by 2p
Iron core is segmented the composition that connects successively, and each eccentric segmentation unshakable in one's determination is that symmetry axis is set in specular to the midline with its footpath, each
The outline midpoint of eccentric segmentation unshakable in one's determination is air gap distance smallest point, and the outline two-end-point of each eccentric segmentation unshakable in one's determination is air gap
Apart from maximum point；Wherein p is motor number of pole-pairs；
Each eccentric unshakable in one's determination segmentation it is upper close to its outline side circumferentially set 2n permanent magnet axial pass trough and 1 it is weak
Magnetic axial pass trough, n are positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, and 2n forever
Magnet axial groove is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, 2n permanent magnet axial pass trough and 1 it is weak
The arragement direction of magnetic axial pass trough is vertical with d shaft centre lines, and permanent magnet 1 is provided with each permanent magnet axial pass trough；Each
Weak magnetic axial pass trough is made up of the sliding-rail groove 2 positioned at centre and a pair of magnet isolation tanks 3 of the symmetrical setting in its both sides, sliding-rail groove 2
Radical length is longer than permanent magnet axial pass trough, and its radical length extends to the outer radial direction of rotor core, and sliding-rail groove 2 is in
Convex shape, the convex shape top set two springs 4 and a magnetic conduction in rotor core outline side, each sliding-rail groove 2
Block 5, the fixing end of two springs 4 are individually fixed at the middle both sides platform of sliding-rail groove 2, and the free end of two springs 4 is with leading
Magnetic patch 5 is connected, and magnetic inductive block 5, magnet isolation tank 3 are identical with the radical length of permanent magnet axial pass trough；The d shaft centre lines are bias
The footpath of iron core segmentation is to the midline；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove 6, two interpolars are every magnetic flux groove 6 with d axles
Heart line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove 6 with corresponding permanent magnet axial pass trough.
All permanent magnet axial pass troughs composition square shape in present embodiment, and the center of the square shape is rotor iron
The axle center of the heart.Sliding-rail groove is convex slot in weak magnetic unit, and the fixing end of two springs is arranged at convex slot halfpace.
Embodiment five：Illustrate present embodiment with reference to Fig. 4 to Fig. 5, present embodiment is to embodiment four
It is described further, non-magnetic solids block is set in magnet isolation tank 3.
Permanent magnet in the present invention uses radial magnetizing, and the eccentrical shape of rotor core causes rotor core axial circular weekly form
Air gap distance between face and stator core is unequal.The air gap between rotor core and stator core on d shaft centre lines away from
From minimum, the air gap distance between rotor core and stator core on q shaft centre lines is maximum.
When motor is run below rated speed, magnetic inductive block 5 is located in sliding-rail groove 2, radially adjacent to rotating shaft side, spring 4
In the raw, when motor operates above in rated speed, magnetic inductive block 5 is along sliding-rail groove 2 radially towards away from the center of circle
Move in direction.
Spring 4 in the present invention is solid spring or gas spring.
The present invention realizes that the principle of lifting torque performance and weak magnetic is:
1st, torque performance is lifted：
According to permagnetic synchronous motor torque formula：
Te=p [ψfiq+(Ld-Lq)idiq], 1
Wherein TeFor permagnetic synchronous motor electromagnetic torque, p is motor number of pole-pairs, ψfFor magnetic linkage caused by permanent magnet, iqIt is fixed
The quadrature axis current of sub- winding, LdFor the d-axis inductance of stator winding, LqFor the quadrature axis inductance of stator winding, idFor stator winding
Direct-axis current.
Traditional permagnetic synchronous motor is according to torque formula, when being run below rated speed, Ld<Lq, it is passed through negative straight
Shaft current ensures reluctance torque for just, permanent-magnet torque is also for just, whether total electromagnetic torque increases the negative d-axis of sacrifice to be seen
The size of permanent-magnet torque caused by reluctance torque caused by electric current and equivalent direct-axis current, when rated speed operates above,
Ld<Lq, increase negative direct-axis current and cause permanent-magnet torque rapid decrease, direct-axis current increase, quadrature axis current reduce, reluctance torque
It can not be lifted, but cause permanent-magnet torque to decline rapidly, total electromagnetic torque is declined rapidly.
Rotor in the present invention, because sliding-rail groove is located on d shaft centre lines in weak magnetic unit, exist in quadrature axis magnetic circuit
The very big air sliding-rail groove of magnetic resistance, therefore quadrature axis inductance very little, due to using not waiting air gap, d-axis position of center line rotor and fixed
Air gap between son is minimum, and the air gap between the rotor core of quadrature axis position of center line and stator is maximum, per extremely adjacent permanent magnet
Between leave magnetic bridge, d-axis causes rotor direct axis reluctance further to reduce with magnetic bridge structure so that use rotor knot of the present invention
The d-axis inductance of the novel permanent magnetic synchronous motor of structure is more than quadrature axis inductance, i.e. Ld>Lq.When being run below rated speed, weak magnetic list
Magnetic inductive block in member is located at sliding-rail groove close to the bottom of that side of the center of circle, and fixed, and the magnet isolation tank of magnetic inductive block both sides hides completely
Magnetic conductor is blocked, to reduce leakage field.Because Ld>Lq, so the direct-axis current for only needing to be passed through the very little of forward direction can be obtained by just
Permanent-magnet torque and positive reluctance torque.When motor speed exceedes rated speed, the magnetic inductive block in weak magnetic unit is in centrifugal force
Under effect, being run along sliding-rail groove to the direction of circumferential exterior, the area that the magnet isolation tanks of magnetic inductive block both sides blocks magnetic inductive block diminishes,
The magnetic resistance very little of magnetic inductive block, magnetic inductive block provide magnetic circuit path for quadrature axis magnetic circuit so that quadrature axis inductance increases.Therefore with speed
Increase, magnetic inductive block movement distance it is bigger, quadrature axis magnetic circuit reluctance is smaller, and quadrature axis inductance is bigger.Quadrature axis inductance is the letter of speed
Number, is a variable.When quadrature axis inductance is equal to d-axis inductance, id=0, electric current is all for producing permanent-magnet torque.With speed
The increase of degree, quadrature axis inductance exceed d-axis inductance, i.e. Ld<Lq, according to equation 1, being passed through the negative sense direct-axis current of very little can ensure
Reluctance torque is just, to compare with reluctance torque when being run below rated speed and do not decline, still there is the output of reluctance torque, and
And permanent-magnet torque does not increase the direct-axis current of negative sense as traditional permagnetic synchronous motor, also handed over without appearance due to reducing
Permanent-magnet torque diminishes rapidly caused by shaft current.Therefore total electromagnetic torque is compared with traditional permagnetic synchronous motor and improved very
More
2nd, weak magnetic mechanism：
When rotor is run below rated speed, the magnetic inductive block in weak magnetic unit is located at sliding-rail groove close to that side of the center of circle
Bottom, and fixed, the magnet isolation tank of magnetic inductive block both sides shelters from magnetic conductor completely, to reduce leakage field.Motor speed exceedes
During rated speed, the magnetic inductive block in weak magnetic unit under the influence of centrifugal force, is run along sliding-rail groove to the direction of circumferential exterior,
The area that the magnet isolation tank of magnetic inductive block both sides blocks magnetic inductive block diminishes, the magnetic resistance very little of magnetic inductive block, and the magnetic flux that permanent magnet is sent passes through
Magnetic inductive block is closed in internal rotor, and air-gap flux reduces, and the distance that magnetic conductor is run in sliding-rail groove to circumferential exterior direction is got over
Greatly, the magnetic circuit area that magnetic inductive block provides is bigger, and the magnetic flux that permanent magnet is sent is got over by magnetic inductive block in the magnetic flux that internal rotor closes
More, smaller by the magnetic flux of air gap, weak magnetic effect is better, thus achieves weak magnetic.In addition, the public affairs according to preferable maximum speed
Formula,Wherein nmaxFor preferable maximum speed, ulimFor the voltage limit in dq axle systems, ilimFor dq
Current limit value in axle system, the d-axis inductance of this motor is compared with conventional motors will greatly, and this causes motor in theory
Reach higher rotating speed advantageously.
Claims (5)
1. a kind of quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it includes rotor core, it is characterised in that described
Rotor core is along the circumferential direction connected successively by 2p eccentric iron core segmentation to be formed, and each bias is unshakable in one's determination to be segmented with its footpath to the midline
Set for symmetry axis in specular, the outline midpoint of each eccentric segmentation unshakable in one's determination is air gap distance smallest point, each eccentric
The outline two-end-point of iron core segmentation is air gap distance maximum point；Wherein p is motor number of pole-pairs；
Each eccentric iron core is segmented its upper close outline side circumferentially circumferentially disposed 2n permanent magnet axial pass trough and 1 weak magnetic
Axial pass trough, n are positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, 2n permanent magnetism
Body axial pass trough is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, and is collectively forming direction with weak magnetic axial pass trough
The V-shaped of rotor core rotor shaft direction, permanent magnet (1) is provided with each permanent magnet axial pass trough；Each weak magnetic is axially logical
Groove is made up of a pair of magnet isolation tanks (3) of the symmetrical setting of sliding-rail groove (2) and its both sides positioned at centre, the radial direction of sliding-rail groove (2)
Length is longer than permanent magnet axial pass trough, and its radical length extends to the outer radial direction of rotor core, is set in each sliding-rail groove (2)
Two springs (4) and a magnetic inductive block (5) are put, sliding-rail groove (2) is close to the bottom surface of rotor core outline as bottom land connection two
The fixing end of individual spring (4), the free end of two springs (4) are connected with magnetic inductive block (5), magnetic inductive block (5) and permanent magnet axial direction
The radical length of groove is identical, and magnet isolation tank (3) is identical with the radical length of magnetic inductive block (5) or the radical length of magnet isolation tank (3)
Less than the radical length of magnetic inductive block (5)；The d shaft centre lines for eccentric unshakable in one's determination segmentation footpath to the midline；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove (6), two interpolars are every magnetic flux groove (6) with d axles
Heart line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove (6) with corresponding permanent magnet axial pass trough.
2. quadrature axis inductance according to claim 1 it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it is characterised in that every magnetic
Non-magnetic solids block is set in groove (3).
3. quadrature axis inductance according to claim 1 or 2 it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it is characterised in that
Each permanent magnet axial pass trough is in tile shape or rectangle.
4. a kind of quadrature axis inductance it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it includes rotor core, it is characterised in that described
Rotor core is along the circumferential direction connected successively by 2p eccentric iron core segmentation to be formed, and each bias is unshakable in one's determination to be segmented with its footpath to the midline
Set for symmetry axis in specular, the outline midpoint of each eccentric segmentation unshakable in one's determination is air gap distance smallest point, each eccentric
The outline two-end-point of iron core segmentation is air gap distance maximum point；Wherein p is motor number of pole-pairs；
Each eccentric segmentation unshakable in one's determination is upper circumferentially to set 2n permanent magnet axial pass trough and 1 weak magnetic axle close to its outline side
To groove, n is positive integer；The center line of weak magnetic axial pass trough overlaps with the d shaft centre lines of eccentric segmentation unshakable in one's determination, 2n permanent magnet
Axial pass trough is uniformly distributed in the both sides of weak magnetic axial pass trough in mirror symmetry, 2n permanent magnet axial pass trough and 1 weak magnetic axle
It is vertical with d shaft centre lines to the arragement direction of groove, permanent magnet (1) is provided with each permanent magnet axial pass trough；It is each weak
Magnetic axial pass trough is made up of a pair of magnet isolation tanks (3) of the symmetrical setting of sliding-rail groove (2) and its both sides positioned at centre, sliding-rail groove
(2) radical length is longer than permanent magnet axial pass trough, and its radical length extends to the outer radial direction of rotor core, and slide rail
Groove (2) is in convex shape, and the convex shape top sets two springs (4) in rotor core outline side, each sliding-rail groove (2)
With a magnetic inductive block (5), the fixing end of two springs (4) is individually fixed at the middle both sides platform of sliding-rail groove (2), two bullets
The free end of spring (4) is connected with magnetic inductive block (5), magnetic inductive block (5), the radical length of magnet isolation tank (3) and permanent magnet axial pass trough
It is identical；The d shaft centre lines for eccentric unshakable in one's determination segmentation footpath to the midline；
The both ends of each eccentric segmentation unshakable in one's determination set interpolar respectively, and every magnetic flux groove (6), two interpolars are every magnetic flux groove (6) with d axles
Heart line is that symmetry axis is set in specular, and each interpolar is connected every magnetic flux groove (6) with corresponding permanent magnet axial pass trough.
5. quadrature axis inductance according to claim 4 it is variable can adjustable magnetic permanent-magnetic synchronous motor rotor, it is characterised in that every magnetic
Non-magnetic solids block is set in groove (3).
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| CN106712338B (en) * | 2017-01-17 | 2019-04-16 | 河海大学 | High weak magnetic property Halbach array permanent magnet synchronous motor |
| CN106849579B (en) * | 2017-01-17 | 2019-07-12 | 广东美芝制冷设备有限公司 | Magneto and compressor with it |
| WO2019000830A1 (en) * | 2017-06-30 | 2019-01-03 | 广东美芝制冷设备有限公司 | Permanent magnet motor for compressor and compressor having same |
| CN109274186A (en) * | 2017-07-17 | 2019-01-25 | 舍弗勒技术股份两合公司 | The rotor and permanent magnet synchronous motor of permanent magnet synchronous motor |
| CN109193987A (en) * | 2018-11-23 | 2019-01-11 | 黑龙江大学 | Anti- salient pole lacks Rare-earth PMSM Rotor Structure |
| CN109450137A (en) * | 2018-12-25 | 2019-03-08 | 北斗航天汽车（北京）有限公司 | Rotor and magneto with automatic weak-magnetic structure |
| CN110086276A (en) * | 2019-06-12 | 2019-08-02 | 广东工业大学 | A kind of magneto and its rotor |
| CN114094740B (en) * | 2020-07-31 | 2023-03-14 | 安徽威灵汽车部件有限公司 | Rotor punching sheet, rotor, motor and vehicle |
| CN112821615A (en) * | 2021-02-24 | 2021-05-18 | 上海电机学院 | Rotor structure for flux weakening and speed increasing of permanent magnet synchronous motor for tangential magnetization |
| CN113629915A (en) * | 2021-08-03 | 2021-11-09 | 珠海格力电器股份有限公司 | Rotor assembly, electric spindle assembly and motor |
| CN115694019B (en) * | 2023-01-04 | 2023-04-28 | 中山大洋电机股份有限公司 | Permanent magnet rotor structure with variable air gap and permanent magnet motor |
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