CN108365722A - A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure - Google Patents
A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure Download PDFInfo
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- CN108365722A CN108365722A CN201810133337.8A CN201810133337A CN108365722A CN 108365722 A CN108365722 A CN 108365722A CN 201810133337 A CN201810133337 A CN 201810133337A CN 108365722 A CN108365722 A CN 108365722A
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- 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
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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Abstract
The invention discloses a kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structures, including the grid shape magnetic regulation mechanism being set in motor gas-gap that suspends, grid shape magnetic regulation mechanism includes the outer layer cylinder being coaxially disposed with machine shaft and internal layer cylinder, and outer layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity；Outer layer cylinder is connected by the left part of hitch frame and machine shaft, and internal layer cylinder is connected by the right part of hitch frame and machine shaft, and the junction of hitch frame and machine shaft is equipped with axial adjustment structure；The axial adjustment structure of both sides may be implemented in the axial displacement on machine shaft, and then the outer layer cylinder being attached thereto and/or internal layer cylinder is driven to move by hitch frame, realize that the radial spacing between outer layer cylinder and internal layer cylinder adjusts, to change the air height in motor gas-gap, the magnetic resistance adjustment of motor gas-gap is realized.
Description
Technical field
The present invention relates to technical field of motors, and in particular to a kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnet synchronous motor
Structure.
Background technology
The air gap of magneto refers to the gap between rotor.The size of motor gas-gap affects the size of flux density,
And then it can also influence the limit speed of motor.We can promote the limit speed of motor by weakening this mode of magnetic flux.
Under different working conditions, the requirement to magnetic field intensity is also different motor, when the rotating speed of motor is below rated speed
When, in order to ensure that electric motor starting torque is stablized, then it need not reduce the magnetic field intensity of motor；When the rotating speed of motor is more than specified turn
When fast, we can increase the limit speed of motor using weak magnetic.It can be seen that the how in due course magnetic of flexible regulation motor
The limit speed that field intensity carrys out regulation motor is of great significance to.
Currently, motor in the market is all the optimal gas length for considering various factors before design and obtaining, at
The air gap of motor is changeless after product come out, then the magnetic field intensity of motor is also changeless.For existing market
This defect of upper motor, and the present invention changes limit speed by changing size of gaps to adjust magnetic field intensity and be finally reached
Purpose, can be with this problem of effective solution.
Invention content
The present invention in order to solve the problems in the prior art, provides a kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent-magnet synchronous
Electric machine structure can realize weak-magnetic speed-regulating by adjusting permanent magnet synchronous motor size of gaps.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating
Permanent magnetic synchronous motor structure, it includes the grid shape magnetic regulation mechanism being set in motor gas-gap that suspends, and grid shape magnetic regulation mechanism includes and electricity
The outer layer cylinder and internal layer cylinder, outer layer cylinder of machine shaft coaxial arrangement are connected with internal layer cylinder by the blade of magnetic conductivity；
Outer layer cylinder is connected by the left part of hitch frame and machine shaft, the right part that internal layer cylinder passes through hitch frame and machine shaft
Connection, and the junction of hitch frame and machine shaft is equipped with axial adjustment structure；
The axial adjustment structure of both sides may be implemented in the axial displacement on machine shaft, and then is attached thereto by hitch frame drive
Outer layer cylinder and/or the movement of internal layer cylinder, realize that the radial spacing between outer layer cylinder and internal layer cylinder adjusts, to change motor gas-gap
Interior air height realizes the magnetic resistance adjustment of motor gas-gap.
The set-up mode that outer layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity in the grid shape magnetic regulation mechanism is as follows：Leaf
Piece is arranged along the axial and circumferential directions, and setting is multigroup, and the inside and outside both ends of each blade hingedly connect with corresponding outer layer cylinder and internal layer cylinder respectively
It connects.
The set-up mode that outer layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity in the grid shape magnetic regulation mechanism is as follows：Leaf
Piece is arranged in an axial direction, and setting is multiple, and each blade is ring-type, and the inner ring of blade is articulated and connected with internal layer cylinder, the outer ring of blade
It is articulated and connected with outer layer cylinder.
Cavity between internal layer cylinder and outer layer cylinder is divided into multiple mutually independent sub- chambers, and adjacent sub- chamber by the blade
By the stomata connection being arranged on corresponding blade, the tail portion for being located at grid shape magnetic regulation mechanism is equipped with rubber pocket, rubber pocket and grid shape
The sub- chamber of magnetic regulation mechanism tail portion is connected to, and rubber pocket and sub- intracavitary are marked with compressible magnetic conductivity fluent material or magnetic conductivity powder
Material；
When the radial spacing between internal layer cylinder and outer layer cylinder reduces, the pressure in grid shape magnetic regulation mechanism is more than the pressure in rubber pocket
By force, magnetic conductivity fluent material or magnetic conductivity dusty material extra in sub- chamber in grid shape magnetic regulation mechanism are compressed to rubber pocket at this time
It is interior；
When the radial spacing between internal layer cylinder and outer layer cylinder increases, the pressure in grid shape magnetic regulation mechanism is less than the pressure in rubber pocket
By force, magnetic conductivity fluent material or magnetic conductivity the dusty material release being compressed at this time in rubber pocket are filled into grid shape magnetic regulation mechanism
Sub- chamber in.
The axial adjustment structure is self-regulation structure, and self-regulation structure includes the ball being set on machine shaft
Bearing, wherein it is located at the left part of machine shaft by the ball bearing that hitch frame is connect with outer layer cylinder, and referred to as left end rolls
Pearl bearing, wherein it is located at the right part of machine shaft by the ball bearing that hitch frame is connect with internal layer cylinder, and referred to as right end
Ball bearing；
Thread segment is correspondingly provided on machine shaft, and thread segment is by the intensive thread segment in outside and the sparse thread segment group of inside
At；The rotation direction thread segment corresponding with right end ball bearing of the corresponding thread segment of left end ball bearing it is oppositely oriented；Ball axis
The inner ring held is threadedly coupled with the corresponding thread segment of machine shaft, and the outer shroud of ball bearing is connected with corresponding hitch frame；
Before the rotating speed of motor reaches rated speed, when motor accelerates, ball bearing is under the action of rotary inertia so that motor
The speed of shaft and the speed of ball bearing have deviation, and ball bearing can be caused to be moved inwardly by outside, i.e. left end ball axis
It holds and moves from left to right, right end ball bearing moves from right to left；With the increase of speed, the speed and electricity of ball bearing inner ring
The speed of machine shaft is gradually consistent；Before motor does not reach rated speed, ball bearing is located at intensive thread segment,
The range very little that left end ball bearing and right end ball bearing position move inward, corresponding grid shape magnetic regulation mechanism vary less, and adjust
Magnetic action unobvious, magnetic flux are held essentially constant；
When the rotating speed of motor reaches rated speed and then carries out motor acceleration, also due to the effect of rotary inertia, ball
Bearing also will continue to move inwardly, and ball bearing is located at sparse thread segment at this time, the range that ball bearing moves inward
It is bigger, and then drive the movable cylinder being attached thereto to move by hitch frame, movable cylinder movement realizes it between fixed cylinder
Radial spacing shortens, and to which the air height in motor gas-gap become larger, that is, increases the magnetic resistance of air gap, further decreases motor
Magnetic flux, achieve the purpose that acceleration；
When motor needs to accelerate again, ball bearing continues to move to side, continues the radial direction between shortening activity cylinder and fixed cylinder
Spacing further decreases the magnetic flux of motor, realizes the weak magnetism speed expansion of motor to promote the limit velocity of motor；Most wire grid shape adjustable magnetic
Mechanism reaches linear type, and motor magnetic flux amount is minimum, and the limit velocity of motor is maximum；
When motor by rotating speed height be reduced to rotating speed it is low when, decelerating through motor, ball bearing under the action of rotary inertia so that
The speed of machine shaft and the speed of ball bearing have deviation, and ball bearing moves outward at this time, with the reduction of speed, rolling
The speed of pearl bearing inner ring and the speed of machine shaft are gradually consistent；When decelerating through motor, due to the effect of rotary inertia
So that ball bearing moves outward, i.e. left end ball bearing moves from right to left, and right end ball bearing moves from left to right, into
And the movable cylinder being attached thereto is driven to move by hitch frame, movable cylinder movement realizes that its radial spacing between fixed cylinder adds
Greatly, to which the air height in motor gas-gap become smaller, that is, the magnetic resistance of air gap is reduced, the magnetic flux of motor is further increased
Amount, achievees the purpose that deceleration；
When motor slows down again, ball bearing continuation moves outward, continues between the radial direction between increase activity cylinder and fixed cylinder
Away from further increasing the magnetic flux of motor, realize the reduction of speed of motor, until motor stops, entire grid shape magnetic regulation mechanism resets.
The outer shroud of the ball bearing is also associated with the adjustable magnetic ratio for increaseing or decreasing entire ball bearing rotational inertia
Example valve, to adjust the size of the leftward or rightward motion range of ball bearing.
The adjustable magnetic proportioning valve includes the radially secure adjusting rod mounted on ball bearing outer shroud, and adjusting rod is equipped with can
The adjusting block for moving and locking along adjusting rod.
The axial both ends that the machine shaft is located at thread segment are equipped with limiting device, to limit the movement model of ball bearing
It encloses.
The axial adjustment structure is manual adjustment structure, and manual adjustment structure includes the ball being set on machine shaft
The inner ring of bearing, ball bearing is slidably matched in the axial direction with machine shaft, and the outer shroud of ball bearing connects with corresponding hitch frame
It connects；And manual modulation valve is additionally provided on ball bearing, manual modulation valve include pass axially through corresponding end cap and with its screw thread
The inner end of the screw rod of connection, screw rod is connect with ball bearing, and axial screw outer end is equipped with regulation handle；Ball bearing and corresponding end
Resetting apparatus is equipped between lid.
The resetting apparatus is the resetting spring for connecting ball bearing and corresponding end cap.
The beneficial effects of the invention are as follows：
1. the present invention may be implemented in motor by axial adjustment structure and turn by the way that grid shape magnetic regulation mechanism is arranged in motor gas-gap
Axial displacement on axis realizes outer layer cylinder and internal layer cylinder relative motion in the hitch frame band moving grid shape magnetic regulation mechanism of the left and right sides,
Realize radial spacing adjustment between the two（It increases or shortens）, to change the air height in motor gas-gap（Become smaller or becomes
Greatly）, realize the magnetic resistance adjustment of motor gas-gap, to change the magnetic flux of motor, achieve the purpose that deceleration or acceleration.
2. the axial adjustment structure can be self-regulation structure, self-regulation structure can be according to acceleration or deceleration need
Seek the automatic axial displacement for realizing axial adjustment structure on machine shaft.
Self-regulation structure includes the ball bearing being set on machine shaft, wherein being connect with outer layer cylinder by hitch frame
Ball bearing be located at the left part of machine shaft, and referred to as left end ball bearing, connect with internal layer cylinder wherein passing through hitch frame
The ball bearing connect is located at the right part of machine shaft, and referred to as right end ball bearing；
Thread segment is correspondingly provided on machine shaft, and thread segment is by the intensive thread segment in outside and the sparse thread segment group of inside
At；The rotation direction thread segment corresponding with right end ball bearing of the corresponding thread segment of left end ball bearing it is oppositely oriented；Ball axis
The inner ring held is threadedly coupled with the corresponding thread segment of machine shaft, and the outer shroud of ball bearing is connected with corresponding hitch frame；
Before the rotating speed of motor reaches rated speed, when motor accelerates, ball bearing is under the action of rotary inertia so that motor
The speed of shaft and the speed of ball bearing have deviation, and ball bearing can be caused to be moved inwardly by outside, i.e. left end ball axis
It holds and moves from left to right, right end ball bearing moves from right to left；With the increase of speed, the speed and electricity of ball bearing inner ring
The speed of machine shaft is gradually consistent；Before motor does not reach rated speed, ball bearing is located at intensive thread segment,
The range very little that left end ball bearing and right end ball bearing position move inward, corresponding grid shape magnetic regulation mechanism vary less, and adjust
Magnetic action unobvious, magnetic flux are held essentially constant；
When the rotating speed of motor reaches rated speed and then carries out motor acceleration, also due to the effect of rotary inertia, ball
Bearing also will continue to move inwardly, and ball bearing is located at sparse thread segment at this time, the range that ball bearing moves inward
It is bigger, and then drive the movable cylinder being attached thereto to move by hitch frame, movable cylinder movement realizes it between fixed cylinder
Radial spacing shortens, and to which the air height in motor gas-gap become larger, that is, increases the magnetic resistance of air gap, further decreases motor
Magnetic flux, achieve the purpose that acceleration；
When motor needs to accelerate again, ball bearing continues to move to side, continues the radial direction between shortening activity cylinder and fixed cylinder
Spacing further decreases the magnetic flux of motor, realizes the weak magnetism speed expansion of motor to promote the limit velocity of motor；Most wire grid shape adjustable magnetic
Mechanism reaches linear type, and motor magnetic flux amount is minimum, and the limit velocity of motor is maximum；
When motor by rotating speed height be reduced to rotating speed it is low when, decelerating through motor, ball bearing under the action of rotary inertia so that
The speed of machine shaft and the speed of ball bearing have deviation, and ball bearing moves outward at this time, with the reduction of speed, rolling
The speed of pearl bearing inner ring and the speed of machine shaft are gradually consistent；When decelerating through motor, due to the effect of rotary inertia
So that ball bearing moves outward, i.e. left end ball bearing moves from right to left, and right end ball bearing moves from left to right, into
And the movable cylinder being attached thereto is driven to move by hitch frame, movable cylinder movement realizes that its radial spacing between fixed cylinder adds
Greatly, to which the air height in motor gas-gap become smaller, that is, the magnetic resistance of air gap is reduced, the magnetic flux of motor is further increased
Amount, achievees the purpose that deceleration；
When motor slows down again, ball bearing continuation moves outward, continues between the radial direction between increase activity cylinder and fixed cylinder
Away from further increasing the magnetic flux of motor, realize the reduction of speed of motor, until motor stops, entire grid shape magnetic regulation mechanism resets.
3. the outer shroud of ball bearing described in self-regulation structure is also associated with for increaseing or decreasing entire ball bearing
The adjustable magnetic proportioning valve of rotary inertia can increased or decrease the rotary inertia of entire bearing by adjustable magnetic proportioning valve, every to adjust
The size that speed governing ball bearing moves to the left or to the right, the adjustable magnetic proportioning valve can be adjusted according to the degree of practical weak magnetic
It is whole.
4. the axial both ends that machine shaft described in self-regulation structure is located at thread segment are equipped with limiting device, two limits
Position device limits the motion range of ball bearing, in order to air gap be allowed to be adjusted in reasonable range.The design can use
Weak magnetic method realizes the promotion of motor limit speed.
5. the axial adjustment structure is alternatively manual adjustment structure, manual adjustment structure includes being set in machine shaft
On ball bearing, the inner ring of ball bearing is slidably matched in the axial direction with machine shaft, the outer shroud of ball bearing with it is corresponding
Hitch frame connects；And manual modulation valve is additionally provided on ball bearing, manual modulation valve includes passing axially through corresponding end cap simultaneously
The inner end of the screw rod being threadedly coupled with it, screw rod is connect with ball bearing, and axial screw outer end is equipped with regulation handle；Ball bearing
Resetting apparatus is equipped between corresponding end cap.It mainly pushes ball bearing movement by manual modulation valve to control, so motor
Screw thread is not needed in shaft, the variation of magnetic flux is adjusted by external device (ED) manual modulation valve, and the course of work is adjusted with reference to automatic
Section structure.
6. being equipped with resetting apparatus in manual adjustment structure between ball bearing and corresponding end cap, resetting apparatus is that connection is rolled
The resetting spring of pearl bearing and corresponding end cap, main function are as follows：When manual modulation valve pushes ball bearing to move to the left,
Ball bearing drives resetting spring to stretch to the left, and the thrust of manual modulation valve to the left is equal with the pulling force of resetting spring to the right at this time
Weighing apparatus, continues to move downward, new equilibrium state continues to generate when manual modulation valve continues to press on ball bearing；When turning manual tune
When section valve moves to the right, the thrust of manual modulation valve to the left disappears, and in order to reach equilibrium state, resetting spring, which is shunk, to be pulled
Ball bearing moves to the right, until pulling ball bearing to reset.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiment one；
Fig. 2 is the structural schematic diagram of embodiment two；
Fig. 3 is the structural schematic diagram of thread segment on machine shaft in the present invention；
Fig. 4 is the structural schematic diagram of embodiment three；
Fig. 5 is the air gap change procedure figure of the present invention.
Specific implementation mode
Embodiment one：
It elaborates to the specific implementation mode of the present embodiment below in conjunction with attached drawing 1, Fig. 3 and Fig. 5, the attached drawing of each component in figure
Label is as follows：2- stators, 3- grid shape magnetic regulation mechanisms, 31- outer layer cylinders, 32- internal layer cylinders, 33- blades, 4- hitch frames, 7- ball axis
It holds, 9-limiting devices, the magnetic fields 12- ratio control device.
A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure of the present invention, including suspend and be set to motor gas
Grid shape magnetic regulation mechanism 3 in gap, grid shape magnetic regulation mechanism 3 include the outer layer cylinder 31 being coaxially disposed with machine shaft and internal layer cylinder 32
（Outer layer cylinder 31 and internal layer cylinder 32 are made of nonferromugnetic material）, outer layer cylinder 31 and internal layer cylinder 32 are connected by the blade 33 of magnetic conductivity
It connects.The setting of arranging along the axial and circumferential directions of blade 33 is multigroup, the inside and outside both ends of each blade 33 respectively with corresponding outer layer cylinder 31 and interior
Layer cylinder 32 is articulated and connected.
In the present embodiment, outer layer cylinder 31 is connect by hitch frame 4 with the left part of machine shaft, and internal layer cylinder 32 passes through traction
Frame 4 is connect with the right part of machine shaft, and the junction of hitch frame and machine shaft is equipped with axial adjustment structure；
The axial adjustment structure of both sides may be implemented in the axial displacement on machine shaft, and then be connected therewith by the drive of hitch frame 4
Outer layer cylinder 31 and internal layer cylinder 32 movement connect realizes that the radial spacing between outer layer cylinder 31 and internal layer cylinder 32 adjusts, to change
Air height in motor gas-gap realizes the magnetic resistance adjustment of motor gas-gap
In the present embodiment, the axial adjustment structure is self-regulation structure, and self-regulation structure includes being set in machine shaft
On ball bearing（Screw thread in bearing only has a circle）, wherein the ball bearing position being connect with outer layer cylinder 31 by hitch frame 4
In the left part of machine shaft, and referred to as left end ball bearing 72, wherein the ball being connect with internal layer cylinder 32 by hitch frame 4
Bearing is located at the right part of machine shaft, and referred to as right end ball bearing 71；
Thread segment is correspondingly provided on machine shaft, and thread segment is by the intensive thread segment in outside and the sparse thread segment group of inside
At；The rotation direction thread segment corresponding with right end ball bearing 71 of 72 corresponding thread segment of left end ball bearing it is oppositely oriented；It is left
The inner ring of ball bearing 72 and right end ball bearing 71 is held to be threadedly coupled respectively with the corresponding thread segment of machine shaft, left end ball
The outer shroud of bearing 72 and right end ball bearing 71 is connected with corresponding hitch frame 4 respectively.
As shown in figure 3, thread segment is made of the intensive thread segment in outside and the sparse thread segment of inside, motor is starting not
When reaching rated speed, in order to ensure the better startability of motor at this time, it is unable to weak magnetic during this period, so rolling during this period
Pearl bearing rotates in the region of flight pitch very little, and for such motor in a rotational units, displacement changes very little, magnetic field intensity
Change also very little, the movement range of grid shape magnetic regulation mechanism also very little can be ignored；Motor is after reaching rated speed, at this time
The promotion of motor limit velocity can be realized by weak magnetic, this when, ball bearing was transported in the larger region of flight pitch
Row, in a rotational units, displacement variation is very big, and grid shape magnetic regulation mechanism can be pushed effectively to adjust magnetic field.Due to ball
Bearing internal thread only has a circle, and the flight pitch size in shaft does not influence the operating of ball bearing.
The outer shroud following side of the ball bearing is also associated with for increaseing or decreasing entire ball bearing rotational inertia
Adjustable magnetic proportioning valve 12, the adjustable magnetic proportioning valve 12 include the radially secure adjusting rod mounted on ball bearing outer shroud, adjusting rod
It is equipped with the adjusting block that can be moved and lock along adjusting rod.
The axial both ends that the machine shaft is located at thread segment are equipped with limiting device 9, to limit the movement of ball bearing
Range.
Working principle of the present invention is as follows：Before the rotating speed of motor reaches rated speed, motor is when accelerating, ball bearing
So that the speed and the speed of ball bearing of machine shaft have deviation under the action of rotary inertia, can cause ball bearing to
Medial motion, that is, left end ball bearing 72 moves from left to right, and right end ball bearing 71 moves from right to left；With the increasing of speed
Add, the speed of ball bearing inner ring and the speed of machine shaft are gradually consistent.It will be on machine shaft before rated speed
Screw thread spacing setting it is closeer, also just say, before motor does not reach rated speed, the range that bearing is moved to the left is very
Small, in this case, for varying less for grid shape magnetic regulation mechanism 3, adjustable magnetic acts on unobvious, and magnetic flux is held essentially constant.
When the rotating speed of motor reaches rated speed and then carries out speed governing, similarly, since the effect of rotary inertia, rolling
Pearl bearing also will continue to inwardly move, we increase flight pitch, bearing is inside in the screw thread on designing machine shaft at this time
Mobile range is bigger, this when, the action of grid shape magnetic regulation mechanism 3 will shorten the spacing of upper and lower two sleeves, actually
Exactly the height of air in air gap is become larger, that is, increases the magnetic resistance of air gap, the magnetic flux of motor is further decreased, has reached weak magnetic
Purpose.When motor needs to accelerate again, is continued to reduce motor magnetic flux with same principle, the weak magnetism speed expansion of motor may be implemented
To promote the limit velocity of motor.Most wire grid shape magnetic regulation mechanism 3 reaches linear type, and motor magnetic flux amount is minimum, the limit speed of motor
Degree is maximum（Air gap change procedure is as shown in Figure 5）.
When motor by rotating speed height be reduced to rotating speed it is low when, need at this time increase motor magnetic flux.Motor once subtracts
Speed, the inner ring and machine shaft of ball bearing equally have speed difference, this when of effect on the contrary, ball bearing moves out, with
The reduction of speed, the speed of ball bearing inner ring and the speed of machine shaft are gradually consistent.When decelerating through motor, due to
The effect of rotary inertia makes ball bearing move out, i.e. left end ball bearing moves from right to left, right end ball bearing by
From left to right moves, this when, the action of grid shape magnetic regulation mechanism 3 will increase the spacing of upper and lower two sleeves, actually general
The height of air becomes smaller in air gap, that is, reduces the magnetic resistance of air gap, further increases the magnetic flux of motor, reaches the mesh of deceleration
's.
When motor slows down again, continue to move out with same principle ball bearing, continues to reduce magnetic flux, realize electricity
The reduction of speed of machine, until motor stopping, entire adjustable magnetic system reset.In the process, can also be increased by adjustable magnetic proportioning valve 12
Or reduce the rotary inertia of entire bearing, come the size of ball bearing leftward or rightward motion range when adjusting speed governing each time,
The adjustable magnetic proportioning valve 12 can be adjusted according to the degree of practical weak magnetic.
Two limiting devices 9 limit the motion range of ball bearing, in order to air gap be allowed to be adjusted in reasonable range
Section.
Embodiment two：
It elaborates to the specific implementation mode of the present embodiment below in conjunction with attached drawing 2, Fig. 2 illustrates only the manual adjusting on right side
Structure, the manual adjustment structure in left side is symmetrical with it and is connect with outer layer cylinder 31；The reference numeral of each component is as follows in figure： 2-
Stator, 3- grid shape magnetic regulation mechanisms, 31- outer layer cylinders, 32- internal layer cylinders, 33- blades, 4- hitch frames, 7- ball bearings, 9-limits
Device, 10- manual modulation valves, 13- resetting springs.
The present embodiment and embodiment one the difference is that, the axial adjustment structure is manual adjustment structure, manually
Adjustment structure includes the ball bearing being set on machine shaft left part, and the inner ring and machine shaft of ball bearing are in the axial direction
It is slidably matched, the outer shroud of ball bearing is connected with corresponding hitch frame 4；And manual modulation valve 10, hand are additionally provided on ball bearing
Dynamic regulating valve 10 includes the screw rod for passing axially through corresponding end cap and being threadedly coupled with it, and inner end and the ball bearing of screw rod connect
It connects, axial screw outer end is equipped with regulation handle.
Relative to the self-regulation structure of embodiment one and its automatic adjustment of realization, manual adjustment structure is carrying out manually
The axial movement for pushing ball bearing on machine shaft is mainly controlled by manual modulation valve 10 when adjusting, and then passes through traction
Frame 4 drives the internal layer cylinder 32 being attached thereto to move, its radial spacing adjustment between outer layer cylinder 31 is realized in the movement of internal layer cylinder 32,
To change the air height in motor gas-gap, the magnetic resistance adjustment of motor gas-gap is realized.It is carried out due to the use of manual modulation valve 10
Adjustment, so not needing screw thread on machine shaft 8, the variation of magnetic flux is adjusted by external device (ED) manual modulation valve 10, is had
Body adjustment process is with reference to embodiment one.
Resetting apparatus is additionally provided between ball bearing and corresponding end cap, resetting apparatus is connection ball bearing and corresponding end cap
Resetting spring 13, resetting spring 13 acts on as follows：When manual modulation valve 10 pushes ball bearing to move to the left, ball bearing
Resetting spring 13 is driven to stretch to the left, the thrust of manual modulation valve 10 to the left is equal with the pulling force of resetting spring 13 to the right at this time
Weighing apparatus, continues to move downward, new equilibrium state continues to generate when manual modulation valve 10 continues to press on ball bearing；It is manual when turning
When regulating valve 10 moves to the right, the thrust of manual modulation valve 10 to the left disappears, in order to reach equilibrium state, resetting spring 13
It shrinks and ball bearing is pulled to move to the right, until pulling ball bearing to reset.It is strong that the design can accurately adjust magnetic field manually
Degree realizes the promotion of motor limit speed.
The left end that the machine shaft is located at ball bearing is additionally provided with limiting device 9.
Embodiment three：
It elaborates to the specific implementation mode of the present embodiment below in conjunction with attached drawing 4, the reference numeral of each component is as follows in figure：
31- outer layer cylinders, 32- internal layer cylinders, 33- blades, 34- stomatas, 35- rubber pockets.
The present embodiment and embodiment one the difference is that, outer layer cylinder 31 and internal layer cylinder in the grid shape magnetic regulation mechanism 3
32 is as follows by the set-up mode of the blade connection of magnetic conductivity：Blade 33 is arranged in an axial direction, and setting is multiple, and each blade 33 is
Ring-type, and the inner ring of blade 33 is articulated and connected with internal layer cylinder 32, outer ring and the outer layer cylinder 31 of blade 33 are articulated and connected.
Cavity between internal layer cylinder 32 and outer layer cylinder 31 is divided into multiple mutually independent sub- chambers, and phase by the blade 33
Adjacent sub- chamber is connected to by the way that the stomata 34 on corresponding blade 33 is arranged, and the tail portion for being located at grid shape magnetic regulation mechanism 3 is equipped with rubber pocket 35,
Rubber pocket 35 is connected to the sub- chamber of grid shape magnetic regulation mechanism tail portion, and rubber pocket 35 and sub- intracavitary are marked with compressible magnetic conductivity liquid
Material or magnetic conductivity dusty material；
When the movement of internal layer cylinder 32 realizes that its radial spacing between outer layer cylinder 31 reduces, the pressure in grid shape magnetic regulation mechanism 3
More than the pressure in rubber pocket 35, at this time by magnetic conductivity fluent material or magnetic conductivity extra in sub- chamber in grid shape magnetic regulation mechanism 3
Dusty material is compressed in rubber pocket 35；
When the movement of internal layer cylinder 32 realizes that its radial spacing between outer layer cylinder 31 increases, the pressure in grid shape magnetic regulation mechanism 3
Less than the pressure in rubber pocket 35, it is compressed in rubber pocket 35 magnetic conductivity fluent material or the release of magnetic conductivity dusty material at this time
It is filled into the sub- chamber in grid shape magnetic regulation mechanism 3.
Although minimum is accomplished in gap in design between two blades, but also result in the decline of magnetic conduction ability, this programme
It can effectively solve the problems, such as that magnetic conduction ability is caused to decline because of the gap between two blades.It is in entire grid shape magnetic regulation mechanism
Closed, a tiny stomata is opened on each blade, makes the gap between two blades（Sub- chamber）It is interconnected, notes inside
Enter the fluent material with compressible magnetic property（It can also be magnetic conductivity dusty material）, put in grid shape magnetic regulation mechanism tail portion
Set a telescopic rubber pocket 35.
Under process B state, the void shape between two blades 33 becomes parallelogram from rectangle, and area reduces, grid
Pressure in shape magnetic regulation mechanism 3 is more than the pressure in rubber pocket 35, at this time by magnetic conduction liquid pressure extra in grid shape magnetic regulation mechanism
It is reduced in rubber pocket 35.
Under process A condition, the void shape between two blades 33 becomes rectangular from parallelogram, and void area increases, grid
Pressure in shape magnetic regulation mechanism is less than the pressure in rubber pocket, and the magnetic conduction liquid release being compressed at this time in rubber pocket 35 is filled into
In grid shape magnetic regulation mechanism in extra gap, the effective magnetic conduction ability for improving grid shape magnetic regulation mechanism.The design can make grid shape
Magnetic regulation mechanism has better magnetic conduction ability.
Example IV：
The present embodiment and embodiment one the difference is that, change ball bearing into wing nut（Screw thread in nut only has
One circle）, the course of work is with reference to embodiment one.
Embodiment five：
The present embodiment and embodiment one the difference is that, ball bearing or wing nut and the thread segment phase on machine shaft
Mutually cooperation is designed to have from limit function, can not have to the external limiting device of installation in this way to limit ball bearing or wing
The motion range of nut is designed, the course of work such as embodiment one with simplifying.
Outer layer cylinder 31 and internal layer cylinder 32 in above-described embodiment select cylindrical structure；Above-described embodiment can use weak magnetic side
Method realizes the promotion of motor limit speed.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Still can the present invention be modified or be waited
With replacing, without departing from the spirit or scope of the invention, or any substitutions, the power in the present invention should all be covered
In sharp claimed range.
Claims (10)
1. a kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure, it is characterised in that：It includes suspending to be set to electricity
Grid shape magnetic regulation mechanism in machine air gap, grid shape magnetic regulation mechanism include the outer layer cylinder being coaxially disposed with machine shaft and internal layer cylinder, outside
Layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity；
Outer layer cylinder is connected by the left part of hitch frame and machine shaft, the right part that internal layer cylinder passes through hitch frame and machine shaft
Connection, and the junction of hitch frame and machine shaft is equipped with axial adjustment structure；
The axial adjustment structure of both sides may be implemented in the axial displacement on machine shaft, and then is attached thereto by hitch frame drive
Outer layer cylinder and/or the movement of internal layer cylinder, realize that the radial spacing between outer layer cylinder and internal layer cylinder adjusts, to change motor gas-gap
Interior air height realizes the magnetic resistance adjustment of motor gas-gap.
2. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 1, it is characterised in that：Institute
It is as follows to state the set-up mode that outer layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity in grid shape magnetic regulation mechanism：Blade in an axial direction and
It is multigroup to be circumferentially arranged setting, the inside and outside both ends of each blade respectively with corresponding outer layer cylinder and the articulated connection of internal layer cylinder.
3. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 1, it is characterised in that：Institute
It is as follows to state the set-up mode that outer layer cylinder is connected with internal layer cylinder by the blade of magnetic conductivity in grid shape magnetic regulation mechanism：Blade is arranged in an axial direction
Cloth setting is multiple, and each blade is ring-type, and the inner ring of blade is articulated and connected with internal layer cylinder, and outer ring and the outer layer cylinder of blade are cut with scissors
It connects in succession.
4. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 3, it is characterised in that：Institute
It states blade and the cavity between internal layer cylinder and outer layer cylinder is divided into multiple mutually independent sub- chambers, and adjacent sub- chamber is existed by setting
Stomata connection on corresponding blade, the tail portion for being located at grid shape magnetic regulation mechanism are equipped with rubber pocket, rubber pocket and grid shape magnetic regulation mechanism tail
The sub- chamber in portion is connected to, and rubber pocket and sub- intracavitary are marked with compressible magnetic conductivity fluent material or magnetic conductivity dusty material；
When the radial spacing between internal layer cylinder and outer layer cylinder reduces, the pressure in grid shape magnetic regulation mechanism is more than the pressure in rubber pocket
By force, magnetic conductivity fluent material or magnetic conductivity dusty material extra in sub- chamber in grid shape magnetic regulation mechanism are compressed to rubber pocket at this time
It is interior；
When the radial spacing between internal layer cylinder and outer layer cylinder increases, the pressure in grid shape magnetic regulation mechanism is less than the pressure in rubber pocket
By force, magnetic conductivity fluent material or magnetic conductivity the dusty material release being compressed at this time in rubber pocket are filled into grid shape magnetic regulation mechanism
Sub- chamber in.
5. special according to claim 1-4 any one of them bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structures
Sign is：The axial adjustment structure is self-regulation structure, and self-regulation structure includes the ball being set on machine shaft
Bearing, wherein it is located at the left part of machine shaft by the ball bearing that hitch frame is connect with outer layer cylinder, and referred to as left end rolls
Pearl bearing, wherein it is located at the right part of machine shaft by the ball bearing that hitch frame is connect with internal layer cylinder, and referred to as right end
Ball bearing；
Thread segment is correspondingly provided on machine shaft, and thread segment is by the intensive thread segment in outside and the sparse thread segment group of inside
At；The rotation direction thread segment corresponding with right end ball bearing of the corresponding thread segment of left end ball bearing it is oppositely oriented；Ball axis
The inner ring held is threadedly coupled with the corresponding thread segment of machine shaft, and the outer shroud of ball bearing is connected with corresponding hitch frame；
Before the rotating speed of motor reaches rated speed, when motor accelerates, ball bearing is under the action of rotary inertia so that motor
The speed of shaft and the speed of ball bearing have deviation, and ball bearing can be caused to be moved inwardly by outside, i.e. left end ball axis
It holds and moves from left to right, right end ball bearing moves from right to left；With the increase of speed, the speed and electricity of ball bearing inner ring
The speed of machine shaft is gradually consistent；Before motor does not reach rated speed, ball bearing is located at intensive thread segment,
The range very little that left end ball bearing and right end ball bearing position move inward, corresponding grid shape magnetic regulation mechanism vary less, and adjust
Magnetic action unobvious, magnetic flux are held essentially constant；
When the rotating speed of motor reaches rated speed and then carries out motor acceleration, also due to the effect of rotary inertia, ball
Bearing also will continue to move inwardly, and ball bearing is located at sparse thread segment at this time, the range that ball bearing moves inward
It is bigger, and then drive the movable cylinder being attached thereto to move by hitch frame, movable cylinder movement realizes it between fixed cylinder
Radial spacing shortens, and to which the air height in motor gas-gap become larger, that is, increases the magnetic resistance of air gap, further decreases motor
Magnetic flux, achieve the purpose that acceleration；
When motor needs to accelerate again, ball bearing continues to move to side, continues the radial direction between shortening activity cylinder and fixed cylinder
Spacing further decreases the magnetic flux of motor, realizes the weak magnetism speed expansion of motor to promote the limit velocity of motor；Most wire grid shape adjustable magnetic
Mechanism reaches linear type, and motor magnetic flux amount is minimum, and the limit velocity of motor is maximum；
When motor by rotating speed height be reduced to rotating speed it is low when, decelerating through motor, ball bearing under the action of rotary inertia so that
The speed of machine shaft and the speed of ball bearing have deviation, and ball bearing moves outward at this time, with the reduction of speed, rolling
The speed of pearl bearing inner ring and the speed of machine shaft are gradually consistent；When decelerating through motor, due to the effect of rotary inertia
So that ball bearing moves outward, i.e. left end ball bearing moves from right to left, and right end ball bearing moves from left to right, into
And the movable cylinder being attached thereto is driven to move by hitch frame, movable cylinder movement realizes that its radial spacing between fixed cylinder adds
Greatly, to which the air height in motor gas-gap become smaller, that is, the magnetic resistance of air gap is reduced, the magnetic flux of motor is further increased
Amount, achievees the purpose that deceleration；
When motor slows down again, ball bearing continuation moves outward, continues between the radial direction between increase activity cylinder and fixed cylinder
Away from further increasing the magnetic flux of motor, realize the reduction of speed of motor, until motor stops, entire grid shape magnetic regulation mechanism resets.
6. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 5, it is characterised in that：Institute
The outer shroud for stating ball bearing is also associated with adjustable magnetic proportioning valve for increaseing or decreasing entire ball bearing rotational inertia, to adjust
The size of the leftward or rightward motion range of ball bearing.
7. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 6, it is characterised in that：Institute
It includes the radially secure adjusting rod mounted on ball bearing outer shroud to state adjustable magnetic proportioning valve, and adjusting rod is equipped with and can be moved along adjusting rod
The adjusting block for moving and locking.
8. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 5, it is characterised in that：Institute
It states machine shaft and is located at the axial both ends of thread segment and be equipped with limiting device, to limit the motion range of ball bearing.
9. special according to claim 1-4 any one of them bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structures
Sign is：The axial adjustment structure is manual adjustment structure, and manual adjustment structure includes the ball being set on machine shaft
The inner ring of bearing, ball bearing is slidably matched in the axial direction with machine shaft, and the outer shroud of ball bearing connects with corresponding hitch frame
It connects；And manual modulation valve is additionally provided on ball bearing, manual modulation valve include pass axially through corresponding end cap and with its screw thread
The inner end of the screw rod of connection, screw rod is connect with ball bearing, and axial screw outer end is equipped with regulation handle；Ball bearing and corresponding end
Resetting apparatus is equipped between lid.
10. bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure according to claim 9, it is characterised in that：
The resetting apparatus is the resetting spring for connecting ball bearing and corresponding end cap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133337.8A CN108365722B (en) | 2018-02-09 | 2018-02-09 | A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810133337.8A CN108365722B (en) | 2018-02-09 | 2018-02-09 | A kind of bidirectional modulation formula grid shape weak-magnetic speed-regulating permanent magnetic synchronous motor structure |
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| CN108365722B CN108365722B (en) | 2019-06-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0677914A1 (en) * | 1994-04-15 | 1995-10-18 | Herbert Prof. Dr. Weh | Machine with transverse flux |
| CN204538928U (en) * | 2015-05-05 | 2015-08-05 | 南京信息工程大学 | A kind of composite permanet magnet controllable flux axial magnetic field permanent magnet synchronous machine |
| CN205453333U (en) * | 2015-12-29 | 2016-08-10 | 冶金自动化研究设计院 | Permanent magnet rotor structure of high power density and easy weak magnetism speed governing |
| CN107328506A (en) * | 2016-11-09 | 2017-11-07 | 哈尔滨工业大学 | High-speed electric main shaft dynamometer machine and its application |
-
2018
- 2018-02-09 CN CN201810133337.8A patent/CN108365722B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0677914A1 (en) * | 1994-04-15 | 1995-10-18 | Herbert Prof. Dr. Weh | Machine with transverse flux |
| CN204538928U (en) * | 2015-05-05 | 2015-08-05 | 南京信息工程大学 | A kind of composite permanet magnet controllable flux axial magnetic field permanent magnet synchronous machine |
| CN205453333U (en) * | 2015-12-29 | 2016-08-10 | 冶金自动化研究设计院 | Permanent magnet rotor structure of high power density and easy weak magnetism speed governing |
| CN107328506A (en) * | 2016-11-09 | 2017-11-07 | 哈尔滨工业大学 | High-speed electric main shaft dynamometer machine and its application |
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| CN108365722B (en) | 2019-06-28 |
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