CN207896842U - The salient pole synchronous electric machine of double eccentric arc field structures - Google Patents
The salient pole synchronous electric machine of double eccentric arc field structures Download PDFInfo
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- CN207896842U CN207896842U CN201820100008.9U CN201820100008U CN207896842U CN 207896842 U CN207896842 U CN 207896842U CN 201820100008 U CN201820100008 U CN 201820100008U CN 207896842 U CN207896842 U CN 207896842U
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Abstract
The utility model is related to a kind of salient pole synchronous electric machines of double eccentric arc field structures, it includes motor shaft, rotor and stator, and rotor is arranged in stator, and rotor is rotated around motor shaft；Each pole-face of rotor is arc surface；The pole-face circular arc is made of the small-radius arc of intermediate large radius arc and both ends, and the center of circle of large radius arc and small-radius arc is in the first ray L1On, the center of circle of small-radius arc is between motor shaft axle center and pole-face circular arc vertex, and the center of circle of large radius arc is between motor shaft axle center and the center of circle of small-radius arc.The rotor for optimizing salient pole synchronous electric machine by double eccentric arc field structures, can not only reduce the harmonic wave of salient pole synchronous electric machine excitation field and armature reacting field, and can effectively solve the asymmetry problem of resultant magnetic field.
Description
Technical field
The utility model is related to motors, especially salient pole synchronous electric machine.
Background technology
Traditional salient pole synchronous electric machine (including generator and motor) has been widely used for national economy and national defence is each
Field.In recent years, with the development of the technologies such as permanent-magnet material, power electronics, Motor Optimizing Design, Gao Gong that magneto has
The advantages that rate density, high efficiency, High Power Factor, low torque ripple and low-vibration noise, increasingly highlights, agricultural, industry,
It is promoted and applied well in the products such as military project and aerospace.The development and application of magneto is conducive to China and realizes section
The target of energy emission reduction preferably researches and develops high, refined, peak products.
Currently, salient pole synchronous electric machine is made of stator, rotor, bearing and engine base etc., well known salient pole machine rotor magnetic pole
Structure usually has not eccentric, single eccentric arc, single eccentric arc+straight line and sine to cut extremely etc..Different rotor magnetic pole structures
The air-gap field distribution of motor will be influenced, air-gap field is distributed the performance for directly influencing motor.Above-mentioned several rotor magnetic pole knots
The salient pole synchronous electric machine excitation field and armature reacting field harmonic wave of structure are larger, after fluting effect is using using cassette coefficient equivalent,
Non-load air gap field total harmonic distortion factor after optimization is more than 5% or even 10% or more, while motor load resultant magnetic field is also deposited
High voltage and current harmonic wave, vibration and noise height, cogging torque and torque pulsation are brought in asymmetric problem, therefore to motor
Greatly, efficiency and the disadvantages such as power density is low, directly affect the normal operation and service life of instrument and equipment.
In order to reduce the air-gap field of permanent magnet synchronous motor and the harmonic components of running current, fully to excavate magneto
Efficiency potential, to greatest extent improve motor runnability, in recent years, industry specialists do a lot of work and obtain very well
Achievement in research.Such as a kind of patent of invention " sine wave current self-starting three-phase rare earth permanent-magnetism synchronous motor
(ZL200910063832.7) ", rotor magnetic pole section shape described in the patent is the structure of single eccentric arc+straight line
Form, in practice it has proved that, good sine-wave current is obtained using the motor of the structure, improves the effect of motor by a relatively large margin
Rate.But still there is this structure type larger room for promotion, the utility model to be changed aiming at this problem
Into, and achieve good effect.
Utility model content
The utility model provides a kind of salient pole synchronous electric machine of double eccentric arc field structures, passes through double eccentric arc magnetic poles
The rotor of structure optimization salient pole synchronous electric machine can not only reduce the humorous of salient pole synchronous electric machine excitation field and armature reacting field
Wave, and can effectively solve the asymmetry problem of resultant magnetic field.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of salient pole synchronous electric machine of double eccentric arc field structures, it includes motor shaft, rotor and stator, rotor setting
In stator, rotor is rotated around motor shaft；Each pole-face of rotor is arc surface；
On motor axis projection, the pole-face circular arc of each pole-face arc surface is with the first ray L of the pole-face circular arc1It is symmetrical
Axial symmetry；The first ray L1To be drawn by motor shaft axle center and by the ray on the pole-face circular arc vertex；
The pole-face circular arc is made of the small-radius arc of intermediate large radius arc and both ends, large radius arc and smaller part
The center of circle of diameter circular arc is in the first ray L1On, the center of circle of small-radius arc between motor shaft axle center and pole-face circular arc vertex,
The center of circle of large radius arc is between motor shaft axle center and the center of circle of small-radius arc.
The second ray L2To be drawn by motor shaft axle center and penetrating by large radius arc and small-radius arc intersection point
Line；
RsFor the internal diameter of stator；
OO1For motor shaft axle center to the distance in the large radius center of circle；
δminFor the shortest distance on pole-face circular arc vertex to stator；
δmidFor the shortest distance of large radius arc and small-radius arc intersection point to stator.
In said program, the radius R of the large radius arc1With the radius R of small-radius arc2Ratio is：
RsFor the internal diameter of stator；
OO1For motor shaft axle center to the distance in the large radius center of circle；
δminFor the shortest distance on pole-face circular arc vertex to stator；
δmidFor the shortest distance of large radius arc and small-radius arc intersection point to stator.
The utility model salient pole synchronous electric machine, using three sections of arc structures, (intermediate is more than half for its rotor magnetic pole outer surface
The homocentric symmetrical minor radius eccentric arc of diameter eccentric arc and both ends).
The utility model by change the parameters such as minimal air gap distance, the position in the circular arc center of circle and the corresponding radian of circular arc come
The rotor of the double eccentric arc field structures of optimization, keeps the excitation field of motor and armature reacting field harmonic wave minimum, while effectively
The asymmetry problem for solving resultant magnetic field is finally reached the purpose for promoting salient pole synchronous electric machine performance indicator.
Description of the drawings
Fig. 1 is the utility model embodiment partial structural diagram
Fig. 2,3 for existing single eccentric arc+straight line pole motor radial air gap flux density and its frequency analysis figure
Fig. 4,5 are the utility model embodiment radial air gap flux density and its frequency analysis figure
In figure：1- motor shafts, 2- rotors, 3- stators；4- Exciting Windings for Transverse Differential Protection.
Specific implementation mode
The utility model is described in further detail below in conjunction with the drawings and specific embodiments：
A kind of salient pole synchronous electric machine of double eccentric arc field structures of the utility model as shown in Figure 1, it includes motor
Axis 1, rotor 2 and stator 3, rotor 2 are arranged in stator 3, and rotor 2 is rotated around motor shaft 1；Each pole-face of rotor 2 is arc surface,
It is Exciting Windings for Transverse Differential Protection 4 between each pole-face.
On motor axis projection, the pole-face circular arc of each pole-face arc surface is with the first ray L of the pole-face circular arc1It is symmetrical
Axial symmetry；The first ray L1To be drawn by motor shaft axle center O points and passing through the ray on the pole-face circular arc vertex；
The pole-face circular arc is made of the small-radius arc of intermediate large radius arc and both ends, the center of circle of large radius arc
O1With the center of circle O of small-radius arc2In the first ray L1On, the center of circle O of small-radius arc2Justify in motor shaft axle center and pole-face
Between arc vertex, the center of circle O of large radius arc1Center of circle O in motor shaft axle center and small-radius arc2Between.
The first ray L1With the second ray L2Angle thetamFor
The angle theta of the present embodimentmIt is 24.2 °.
The second ray L2To be drawn by motor shaft axle center O points and passing through large radius arc and small-radius arc intersection point (B
Point or C points) ray；
RsFor the internal diameter of stator；
OO1For motor shaft axle center to the distance in the large radius center of circle；
δminFor the shortest distance on pole-face circular arc vertex to stator；
δmidFor large radius arc and small-radius arc intersection point (B points or C points) to the shortest distance of stator.
The radius R of the large radius arc1With the radius R of small-radius arc2Ratio is：The R of the utility model1、R2Respectively：95.2mm、
84.2mm。
Winding in rotor magnetic pole is to have Damper Winding or undamped winding.
The air gap flux density of the salient pole synchronous electric machine of existing list eccentric arc+straight line magnetic pole and frequency analysis such as Fig. 2 and Fig. 3 institutes
Show, the air gap flux density of the utility model embodiment and frequency analysis are as shown in Figure 4 and Figure 5, as seen from the figure：The utility model is double
The salient pole synchronous electric machine of eccentric arc field structure can make the small voltage and current harmonic wave of motor, cogging torque and torque pulsation
It is small, vibration and noise is low, efficiency and power density are high.In electromagnetism and mechanical properties, double eccentric arc field structures
Salient-pole machine will be substantially better than the salient pole synchronous electric machine of other rotor magnetic pole structures.The total harmonic distortion factor of radial air gap flux density
(THD) can optimize within 1%.
Claims (4)
1. the salient pole synchronous electric machine of pair eccentric arc field structure, it includes motor shaft, rotor and stator, and rotor is arranged in stator
Interior, rotor is rotated around motor shaft；Each pole-face of rotor is arc surface；It is characterized in that：
On motor axis projection, the pole-face circular arc of each pole-face arc surface is with the first ray L of the pole-face circular arc1For symmetry axis pair
Claim；The first ray L1To be drawn by motor shaft axle center and by the ray on the pole-face circular arc vertex；
The pole-face circular arc is made of the small-radius arc of intermediate large radius arc and both ends, large radius arc and minor radius circle
The center of circle of arc is in the first ray L1On, the center of circle of small-radius arc is between motor shaft axle center and pole-face circular arc vertex, most
The center of circle of diameter circular arc is between motor shaft axle center and the center of circle of small-radius arc.
2. salient pole synchronous electric machine as described in claim 1, it is characterised in that：The first ray L1With the second ray L2Folder
Angle θmFor
The second ray L2To be drawn by motor shaft axle center and by the ray of large radius arc and small-radius arc intersection point；
RsFor the internal diameter of stator；
OO1For motor shaft axle center to the distance in the large radius center of circle；
δminFor the shortest distance on pole-face circular arc vertex to stator；
δmidFor the shortest distance of large radius arc and small-radius arc intersection point to stator.
3. salient pole synchronous electric machine as described in claim 1, it is characterised in that：The radius R of large radius arc1And small-radius arc
Radius R2Ratio is：
RsFor the internal diameter of stator；
OO1For motor shaft axle center to the distance in the large radius center of circle；
δminFor the shortest distance on pole-face circular arc vertex to stator；
δmidFor the shortest distance of large radius arc and small-radius arc intersection point to stator.
4. salient pole synchronous electric machine as claimed in claim 1 or 2, it is characterised in that：Include in rotor magnetic pole Damper Winding and
Undamped winding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820100008.9U CN207896842U (en) | 2018-01-21 | 2018-01-21 | The salient pole synchronous electric machine of double eccentric arc field structures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820100008.9U CN207896842U (en) | 2018-01-21 | 2018-01-21 | The salient pole synchronous electric machine of double eccentric arc field structures |
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| CN207896842U true CN207896842U (en) | 2018-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
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2018
- 2018-01-21 CN CN201820100008.9U patent/CN207896842U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
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