CN106941295B - A kind of mechanism for weakening torque ripple of permanent-magnet motor - Google Patents
A kind of mechanism for weakening torque ripple of permanent-magnet motor Download PDFInfo
- Publication number
- CN106941295B CN106941295B CN201710307017.5A CN201710307017A CN106941295B CN 106941295 B CN106941295 B CN 106941295B CN 201710307017 A CN201710307017 A CN 201710307017A CN 106941295 B CN106941295 B CN 106941295B
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- Prior art keywords
- rotor
- support shaft
- permanent
- internal gear
- transmission
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a kind of mechanisms for weakening torque ripple of permanent-magnet motor, including stator, rotor and the transmission mechanism for being set to rotor tip, transmission mechanism includes internal gear, support shaft and the transmission gear for being set in support shaft and being engaged with internal gear, transmission gear is rotatablely connected with rotor, support shaft is set on rotor and parallel with the axis of rotor, internal gear is fixedly installed on stator or electric machine casing, and internal gear is coaxially disposed with stator.The configuration of the present invention is simple, manufacture is at low cost, and motor output torque is enabled to more to stablize.
Description
Technical field
The present invention relates to magneto field, specifically a kind of mechanism for weakening motor torque ripple.
Background technology
Motor is substantially a kind of calutron for converting energy between electric energy and mechanical energy, and this energy
Basis is exactly air-gap field necessary to the process of conversion.There are two ways to air-gap field being provided for motor：A kind of method is
Electric current is passed through to special Exciting Windings for Transverse Differential Protection, magnetic field, i.e. electro-magnetic motor are established by exciting current.Electro-magnetic motor needs excitation system
System and exciting current.Another method then not by external circuit provide excitation, but the permanent magnet by being fixed on rotor come
Magnetic field is generated, therefore does not need to slip-ring brush.This motor, that is, magneto.
Compared to traditional electro-magnetic motor, magneto does not need to Exciting Windings for Transverse Differential Protection and field power supply, can improve power of motor because
Number simplifies electric machine structure.There is no rotor copper loss during due to stable operation, and the repair of excitation unit is eliminated, therefore permanent magnetism
Motor has the advantages such as reduce loss raising efficiency, cooling is simpler, operation is more reliable.It is based on more than advantage, permanent magnetism
The application field of motor is very extensive, almost throughout aerospace, national defence, industrial and agricultural production and the every field of daily life.
And with the development of modern control technology, the raising of permanent magnetic material performance, the reduction of price and processing technology it is perfect.Permanent magnetism
The type of motor also constantly expands with application field.
And in numerous application scenarios, there are many occasions to need motor that there is smaller torque pulsation, reduce vibration with making an uproar
Sound.Torque pulsation is an inherent shortcoming of magneto.When the resonance frequency of torque pulsation frequency and motor stator or rotor
When rate is consistent, the vibration in motor and noise can be amplified.In addition, this problem of torque pulsation meeting limiting motor exists in the motor
Application in High Definition Systems.Therefore, torque pulsation is to weigh an important indicator of motor performance.How to weaken and even eliminate
Torque pulsation is of great significance to.
Torque pulsation is influenced by electric machine structure parameter and control strategy.Electric machine structure parameter causes the factor of torque pulsation
Mainly there are the influence of electromagnetic factors, the influence of tooth slot structure, the influence of current commutation, the influence of armature-reaction and mechanical technology
Influence etc..
At present, there are many method for weakening torque pulsation, such as：Skewed stator slot, skewed-rotor, optimization magnetic pole shape
Shape, using segmentation magnetic pole, the cooperation of pole slot and the methods of Optimal Control Strategy.These methods can weaken a part of torque arteries and veins
It is dynamic, but can not thoroughly solve the problems, such as torque pulsation.
Invention content
For the deficiencies in the prior art, the purpose of the present invention is to provide a kind of weakening torque ripple of permanent-magnet motor
Mechanism, weaken the torque pulsation of magneto.
For achieving the above object, the technical solution adopted by the present invention is：A kind of weakening torque ripple of permanent-magnet motor
Mechanism, including stator, rotor and the transmission mechanism for being set to rotor tip, transmission mechanism includes internal gear, support shaft and setting
In the transmission gear engaged in support shaft and with internal gear, transmission gear is rotatablely connected with rotor, and support shaft is set on rotor
And it is parallel with the axis of rotor, internal gear is fixedly installed on stator or electric machine casing, and internal gear is coaxially disposed with stator.
Preferably, transmission mechanism includes multiple transmission gears, and transmission gear is corresponded with support shaft, all along rotor
To direction on, between the outboard end of adjacent supports axis be equipped with metal connecting plate.
Preferably, rotor tip is equipped with multigroup mutually independent transmission mechanism.
Preferably, two ends of rotor is equipped with transmission mechanism.
Preferably, support shaft is set in the lightening hole of rotor, and the length of support shaft is more than the length of rotor.
Preferably, support shaft is metal bar.
The configuration of the present invention is simple, manufacture is at low cost, has stronger promotional value, and the present invention utilizes transmission gear rotation
Speed substitutes the big mechanism of rotary inertia, which can substitute the big flywheel of tradition, enable to motor output torque more steady
It is fixed, vibration and noise during motor operation is reduced, expands the application field of motor.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is 1 structure diagram of the embodiment of the present invention；
Fig. 3 is 2 structure diagram of the embodiment of the present invention；
Fig. 4 is 3 structure diagram of the embodiment of the present invention；
Fig. 5 is 4 structure diagram of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, a kind of mechanism for weakening torque ripple of permanent-magnet motor, including stator 1, rotor 2 and is set to rotor 2
The transmission mechanism of end, transmission mechanism include internal gear 3, support shaft 4 and are set in support shaft 4 and are engaged with internal gear 3
Transmission gear 5,4 inner end of support shaft is connected with 2 end of rotor and support shaft 4 is parallel with the axis of rotor 2, and internal gear 3 is fixed
On stator 1 or electric machine casing 8, and internal gear 3 is coaxially disposed with stator 1.
Preferably, transmission mechanism includes multiple transmission gears 5, and transmission gear 5 is corresponded with support shaft 4, turns on edge
On the circumferential direction of son 2, metal connecting plate 6 is equipped between the outboard end of adjacent supports axis 4, prevent support shaft 4 shift and
Distortion.
Preferably, 2 end of rotor is equipped with multigroup mutually independent transmission mechanism, and the transmission gear 5 of every group of transmission mechanism exists
In same perpendicular, the transmission gear 5 of each group realizes Multi-layers distributing, does not influence between each other.
Embodiment 1
As shown in Fig. 2, internal gear 3 is fixed on stator 1, transmission gear 5 is connect by bearing with support shaft 4, support
Axis 4 is connect by welding or other fixed forms with rotor 2, and 2 one end of rotor is equipped with transmission mechanism, when motor works, transmission
Gear 5 is moved with the rotation of rotor 2, simultaneously because transmission gear 5 is engaged with fixed internal gear 3 on the stator 1, driving cog
Wheel 5 itself is also around 4 high speed rotation of support shaft, when rotor 2 rotates a circle, the rotation of transmission gear 5 multiple periods itself, and the specific period
Number is related with the tooth of transmission gear 5 and internal gear 3 ratio.
When motor output torque pulsation is steady, transmission gear 5 is moved with rotor 2, while itself high speed rotation；Work as motor
After pulsation occurs in torque, transmission gear 5 continues to maintain former speed that high speed rotation occurs due to self inertia effect.In internal tooth
Under the action of wheel 3, rotor 2 can be hindered to pulse, weaken the amplitude of torque pulsation, reduced motor operation vibration and noise, maintain
The steady torque output of rotor.
Embodiment 2
As shown in figure 3, internal gear 3 is fixed on stator 1,2 both ends of rotor are equipped with transmission mechanism, course of work ginseng
According to embodiment 1, the transmission mechanism at 2 both ends of rotor can make the rotary inertia of the bigger of generation, can further weaken torque pulsation
Amplitude reduces motor operation vibration and noise, maintains the steady torque output of rotor.
Embodiment 3
As shown in figure 4, internal gear 3 is fixed on stator 1, to improve magneto dynamic responding speed, it will usually
Several lightening holes 7 are designed on 2 iron core of rotor, this is the prior art, it is preferred that support shaft 4 is metal bar or selects other just
Property is strong and non-magnetic material, does not influence the normal work of motor, and support shaft 4 is set in the lightening hole 7 of rotor 2, support shaft 4
Length be more than the length of rotor 2, so as to increase the rotary inertia of transmission mechanism, transmission gear 5 is fixed with support shaft 4 to be connected
It connects, support shaft 4 is rotatably dispose in by bearing in lightening hole 7, and support shaft 4 can rotate in lightening hole 7, so as to fulfill driving cog
The rotation connection of wheel 5 and rotor 2, the course of work is with reference to embodiment 1.
Embodiment 4
It as shown in figure 5, internal gear 3 is fixed on electric machine casing 8, will not stop stator slot, can be 1 winding terminal of stator
Portion's reserved space, and then motor is made to maintain higher copper factor, the course of work is with reference to embodiment 1.
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 (5)
1. a kind of mechanism for weakening torque ripple of permanent-magnet motor, it is characterised in that：Including stator, rotor and it is set to rotor tip
Transmission mechanism, transmission mechanism include internal gear, support shaft and the transmission gear for being set in support shaft and being engaged with internal gear,
Transmission gear and rotor are rotatablely connected, and support shaft is set on rotor and parallel with the axis of rotor, and internal gear is fixedly installed on
On stator or electric machine casing, and internal gear is coaxially disposed with stator；
The transmission mechanism includes multiple transmission gears, and transmission gear is corresponded with support shaft, in the side along rotor circumferential direction
Upwards, metal connecting plate is equipped between the outboard end of adjacent supports axis.
2. a kind of mechanism for weakening torque ripple of permanent-magnet motor according to claim 1, it is characterised in that：The rotor-end
Portion is equipped with multigroup mutually independent transmission mechanism.
3. a kind of mechanism for weakening torque ripple of permanent-magnet motor according to claim 1 or 2, it is characterised in that：Described turn
Sub- both ends are equipped with transmission mechanism.
4. a kind of mechanism for weakening torque ripple of permanent-magnet motor according to claim 1 or 2, it is characterised in that：The branch
Support axis is set in the lightening hole of rotor, and the length of support shaft is more than the length of rotor.
5. a kind of mechanism for weakening torque ripple of permanent-magnet motor according to claim 1 or 2, it is characterised in that：The branch
Support axis is metal bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307017.5A CN106941295B (en) | 2017-05-04 | 2017-05-04 | A kind of mechanism for weakening torque ripple of permanent-magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710307017.5A CN106941295B (en) | 2017-05-04 | 2017-05-04 | A kind of mechanism for weakening torque ripple of permanent-magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106941295A CN106941295A (en) | 2017-07-11 |
| CN106941295B true CN106941295B (en) | 2018-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710307017.5A Expired - Fee Related CN106941295B (en) | 2017-05-04 | 2017-05-04 | A kind of mechanism for weakening torque ripple of permanent-magnet motor |
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| Country | Link |
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| CN (1) | CN106941295B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6329731B1 (en) * | 1999-08-10 | 2001-12-11 | The Swatch Group Management Services Ag | Driving unit including a liquid cooled electric motor and a planetary gear |
| CN201260107Y (en) * | 2008-08-27 | 2009-06-17 | 莫祖雄 | Planetary electric motor |
| CN103199650A (en) * | 2013-01-05 | 2013-07-10 | 张元敏 | Three-phase inner rolling type meshing motor |
| CN105099069A (en) * | 2014-05-22 | 2015-11-25 | 奥迪股份公司 | Electric machine |
| CN105958725A (en) * | 2016-06-16 | 2016-09-21 | 安乃达驱动技术（江苏）有限公司 | Composite motor structure |
| CN205901557U (en) * | 2016-08-12 | 2017-01-18 | 河南行星智能电子科技有限公司 | Novel brushless motor that built -in planetary reducer constructs |
-
2017
- 2017-05-04 CN CN201710307017.5A patent/CN106941295B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6329731B1 (en) * | 1999-08-10 | 2001-12-11 | The Swatch Group Management Services Ag | Driving unit including a liquid cooled electric motor and a planetary gear |
| CN201260107Y (en) * | 2008-08-27 | 2009-06-17 | 莫祖雄 | Planetary electric motor |
| CN103199650A (en) * | 2013-01-05 | 2013-07-10 | 张元敏 | Three-phase inner rolling type meshing motor |
| CN105099069A (en) * | 2014-05-22 | 2015-11-25 | 奥迪股份公司 | Electric machine |
| CN105958725A (en) * | 2016-06-16 | 2016-09-21 | 安乃达驱动技术（江苏）有限公司 | Composite motor structure |
| CN205901557U (en) * | 2016-08-12 | 2017-01-18 | 河南行星智能电子科技有限公司 | Novel brushless motor that built -in planetary reducer constructs |
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| Publication number | Publication date |
|---|---|
| CN106941295A (en) | 2017-07-11 |
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