CN109888951A - A kind of internal permanent magnet synchronous motor and its rotor magnetic bridge - Google Patents
A kind of internal permanent magnet synchronous motor and its rotor magnetic bridge Download PDFInfo
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- CN109888951A CN109888951A CN201910241350.XA CN201910241350A CN109888951A CN 109888951 A CN109888951 A CN 109888951A CN 201910241350 A CN201910241350 A CN 201910241350A CN 109888951 A CN109888951 A CN 109888951A
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- magnetic bridge
- permanent magnet
- magnet synchronous
- synchronous motor
- bridge
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Abstract
The invention belongs to technical field of motors, disclose a kind of internal permanent magnet synchronous motor rotor magnetic bridge, comprising: magnetic bridge main body；The outer magnetic bridge of the magnetic bridge main body is arranged to circular arc far from the boundary of air gap side；Wherein, one end of the circular arc and the edge of narrow magnetic bridge are tangent, and the other end connects with the edge of permanent magnetism bridge.Rotor magnetic bridge structure provided by the invention can reduce the stress of magnetic bridge under commensurateiy wide, to can sufficiently reduce magnetic bridge width relative to existing magnetic bridge structure, promote output characteristics.
Description
Technical field
The present invention relates to technical field of motors, in particular to a kind of internal permanent magnet synchronous motor and its rotor magnetic bridge.
Background technique
It include magnetic bridge in the rotor structure of internal permanent magnet synchronous motor, setting purpose is not make permanent magnet
Magnetic leakage factor is excessive and causes the utilization rate of permanent magnet too low, thus take every magnetic measure；It is mainly achieved in that: at two
Kept apart between permanent magnet with silicon steel sheet, the silicon steel sheet between two permanent magnets is referred to as magnetic bridge.It is acted on: on the one hand
Be based on magnetic bridge at the characteristic that is easily saturated of flux density leakage magnetic flux is reduced, to improve the output characteristics of motor；It is another
Aspect is to play rotor silicon steel sheet being linked to be an entirety with sufficient mechanical strength.
The width of magnetic bridge is smaller, and leakage magnetic flux will be smaller, and motor output characteristics will be better；However, the width of magnetic bridge
Spend smaller, the rotating centrifugal stress being subject at magnetic bridge is bigger, so that the mechanical strength of rotor is deteriorated, in high speed rotation
When, it is possible to it will appear the biggish elasticity of generation at rotor magnetic bridge or plastic deformation, and then the rotor outside of motor occur and determine
The phenomenon that sub- inside phase mutual friction or collision, eventually lead to motor damage.Therefore, existing motor output characteristics is limited by every magnetic
Bridge width.
Summary of the invention
The present invention provides a kind of internal permanent magnet synchronous motor rotor magnetic bridge, and it is synchronous to solve built-in type permanent-magnet in the prior art
Motor is limited by magnetic bridge requirement of mechanical strength, the lower technical problem of motor output characteristics.
In order to solve the above technical problems, the present invention provides a kind of internal permanent magnet synchronous motor rotor magnetic bridges, comprising: magnetic
Bridge main body；The outer magnetic bridge of the magnetic bridge main body is arranged to circular arc far from the boundary of air gap side；
Wherein, one end of the circular arc and the edge of narrow magnetic bridge are tangent, and the other end connects with the edge of permanent magnetism bridge.
Further, the radian of the circular arc is pi/2.
A kind of internal permanent magnet synchronous motor, using the internal permanent magnet synchronous motor rotor magnetic bridge.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The internal permanent magnet synchronous motor rotor magnetic bridge provided in the embodiment of the present application, by the edge knot for optimizing magnetic bridge
The outer magnetic bridge of magnetic bridge main body is arranged to circular arc, also, one end of the circular arc and narrow magnetic bridge far from the boundary of air gap side by structure
Edge it is tangent, the other end connects with the edge of permanent magnetism bridge；The design width of rotor magnetic bridge can be reduced, turned to reduce
Leakage magnetic flux at sub- magnetic bridge, and then motor useful flux is increased, motor output torque is improved.It is further possible to protecting
In the case where holding rotor magnetic bridge design width, stress suffered by magnetic bridge is reduced, to reduce the risk of rotor magnetic bridge fracture, is mentioned
Lifting motor safety coefficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the internal permanent magnet synchronous motor rotor magnetic bridge that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram of internal permanent magnet synchronous motor rotor magnetic bridge in the prior art；
The simulated stress of rotor magnetic bridge when Fig. 3 is Fig. 2 corresponding internal permanent magnet synchronous motor rotor high speed rotation is shown
It is intended to；
Fig. 4 be the embodiment of the present invention one provide internal permanent magnet synchronous motor rotor high speed rotation when rotor magnetic bridge
Simulated stress schematic diagram；
Fig. 5 is the corresponding internal permanent magnet synchronous motor output torque schematic diagram of Fig. 2；
Fig. 6 is the internal permanent magnet synchronous motor output torque schematic diagram that the embodiment of the present invention one provides；
Rotor magnetic bridge when Fig. 7 is internal permanent magnet synchronous motor rotor high speed rotation provided by Embodiment 2 of the present invention
Simulated stress schematic diagram；
Fig. 8 is internal permanent magnet synchronous motor output torque schematic diagram provided by Embodiment 2 of the present invention；.
Specific embodiment
The embodiment of the present application is solved built-in in the prior art by providing a kind of internal permanent magnet synchronous motor rotor magnetic bridge
Formula permanent magnet synchronous motor is limited by magnetic bridge requirement of mechanical strength, the lower technical problem of motor output characteristics.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to the application skill
The detailed description of art scheme, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application
And the technical characteristic in embodiment can be combined with each other.
Referring to Fig. 1, a kind of internal permanent magnet synchronous motor rotor magnetic bridge, comprising: magnetic bridge main body；Outside the magnetic bridge main body
Magnetic bridge is arranged to circular arc 1 far from the boundary of air gap side.
Wherein, one end of the circular arc and the edge of narrow magnetic bridge are tangent, and the other end connects with the edge of permanent magnetism bridge.
Further, the radian of the circular arc is pi/2.
A kind of internal permanent magnet synchronous motor, using the internal permanent magnet synchronous motor rotor magnetic bridge.
The mechanical strength and motor of studying the magnetic bridge of the embodiment of the present application respectively by a comparative example are exported below
Characteristic.
Embodiment one
Referring to fig. 2, the application provide one it is largely identical as the magnetic bridge main structure of the application, distinctive points are only stating magnetic
The embodiment on boundary 0 of the outer magnetic bridge of bridge main body far from air gap side carries out performance comparative study.
One rotor diameter is the internal permanent magnet synchronous motor of 65mm, maximum speed 20000rpm.
Referring to fig. 2, Fig. 3 and Fig. 5, in comparative example, magnetic bridge width is 1.1mm, and shape is relatively long and narrow.It is in revolving speed
When 20000rpm, simulating the rotor magnetic bridge stress maximum value come is 1089MPa；It simulates and carrys out motor output torque maximum value and be
259Nm；Electric efficiency average value is 96.89%.
Referring to Fig. 1, Fig. 4 and Fig. 6, magnetic bridge shape disclosed in the present embodiment.
When magnetic bridge width is also 1.1mm, when revolving speed is 20000rpm, the rotor magnetic bridge stress maximum value come is simulated
For 799MPa；It simulates and carrys out motor output torque maximum value for 255Nm；Electric efficiency average value is 96.83%.
Parameter comparison when the identical magnetic bridge width 1.1mm of two design schemes is as follows:
| Project | Comparative example | The application | Comparison | Conclusion |
| Magnetic bridge stress (MPa) | 1089 | 799 | 26.6% | The application advantage is prominent |
| Motor output torque (Nm) | 259 | 255 | - 1.5% | The application slightly has disadvantage |
| Electric efficiency (%) | 96.89 | 96.83 | - 0.06% | The two is substantially suitable |
As can be seen from the comparison result, when identical magnetic bridge width, the embodiment of the present application exports cost with 1.5% torque,
Stress about 27% suffered by magnetic bridge is reduced, the risk of rotor magnetic bridge fracture can be greatly reduced, promotes motor safety coefficient.
Embodiment two
Referring to figs. 7 and 8, magnetic bridge scheme provided in this embodiment, when magnetic bridge width be 0.5mm when, be in revolving speed
When 20000rpm, simulating the rotor magnetic bridge stress maximum value come is that 1081MPa simulates to carry out motor output torque maximum value and be
265Nm；Electric efficiency average value is 96.85%.
Parameter comparison when two design scheme difference magnetic bridge width is as follows:
| Project | Comparative example | The application | Comparison | Conclusion |
| Magnetic bridge stress (MPa) | 1089 | 1081 | 0.7% | The two is substantially suitable |
| Motor output torque (Nm) | 259 | 265 | 2.3% | The application has some superiority |
| Electric efficiency (%) | 96.89 | 96.85 | - 0.04% | The two is substantially suitable |
Wherein, comparative example magnetic bridge width is 1.1mm, and the application magnetic bridge width is 0.5mm.
As can be seen from the comparison result, magnetic bridge width is smaller, and in the comparable situation of stress suffered by magnetic bridge, output torque is slightly excellent
2.3%, the output torque that the application is able to ascend, to promote the output performance of motor.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The internal permanent magnet synchronous motor rotor magnetic bridge provided in the embodiment of the present application, by the edge knot for optimizing magnetic bridge
The outer magnetic bridge of magnetic bridge main body is arranged to circular arc, also, one end of the circular arc and narrow magnetic bridge far from the boundary of air gap side by structure
Edge it is tangent, the other end connects with the edge of permanent magnetism bridge；The design width of rotor magnetic bridge can be reduced, turned to reduce
Leakage magnetic flux at sub- magnetic bridge, and then motor useful flux is increased, motor output torque is improved.It is further possible to protecting
In the case where holding rotor magnetic bridge design width, stress suffered by magnetic bridge is reduced, to reduce the risk of rotor magnetic bridge fracture, is mentioned
Lifting motor safety coefficient.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (3)
1. a kind of internal permanent magnet synchronous motor rotor magnetic bridge characterized by comprising magnetic bridge main body；The magnetic bridge main body
Outer magnetic bridge is arranged to circular arc far from the boundary of air gap side；
Wherein, one end of the circular arc and the edge of narrow magnetic bridge are tangent, and the other end connects with the edge of permanent magnetism bridge.
2. internal permanent magnet synchronous motor rotor magnetic bridge as described in claim 1, it is characterised in that: the radian of the circular arc is
π/2。
3. a kind of internal permanent magnet synchronous motor, it is characterised in that: synchronize electricity using built-in type permanent-magnet as described in claim 1
Machine rotor magnetic bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241350.XA CN109888951A (en) | 2019-03-28 | 2019-03-28 | A kind of internal permanent magnet synchronous motor and its rotor magnetic bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910241350.XA CN109888951A (en) | 2019-03-28 | 2019-03-28 | A kind of internal permanent magnet synchronous motor and its rotor magnetic bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109888951A true CN109888951A (en) | 2019-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910241350.XA Pending CN109888951A (en) | 2019-03-28 | 2019-03-28 | A kind of internal permanent magnet synchronous motor and its rotor magnetic bridge |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167230A (en) * | 2005-04-28 | 2008-04-23 | 丰田自动车株式会社 | Rotor |
| CN106911204A (en) * | 2008-11-11 | 2017-06-30 | 福特全球技术公司 | Permanent magnetic motor with biasing pole piece spacing |
-
2019
- 2019-03-28 CN CN201910241350.XA patent/CN109888951A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101167230A (en) * | 2005-04-28 | 2008-04-23 | 丰田自动车株式会社 | Rotor |
| CN106911204A (en) * | 2008-11-11 | 2017-06-30 | 福特全球技术公司 | Permanent magnetic motor with biasing pole piece spacing |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190614 |