CN102638146A - Axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor - Google Patents
Axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor Download PDFInfo
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- CN102638146A CN102638146A CN2011100944495A CN201110094449A CN102638146A CN 102638146 A CN102638146 A CN 102638146A CN 2011100944495 A CN2011100944495 A CN 2011100944495A CN 201110094449 A CN201110094449 A CN 201110094449A CN 102638146 A CN102638146 A CN 102638146A
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Abstract
The invention relates to an axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor, which belongs to the field of synchronous motors. The axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor provided by the invention comprises a synchronous motor consisting of a stator and a rotor, the stator is arranged in a casing and composed of an armature core and an armature winding, and the rotor is provided with a rotating shaft, composed of a N pole shoe, a S pole shoe and a tangential magnetized permanent magnet, and arranged in the stator; and the axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor is characterized in that the N pole shoe and the S pole shoe of the rotor axially extend towards a same direction, an axial additional airgap with a certain length is respectively formed between a hollow cylindrical pole shoe and a circular pole shoe which are formed by drawing and the inner wall and outer wall of a ring-shaped magnetic-conducting bridge fixed on a rear end cover of the motor. Compared with the prior art, the hybrid excitation synchronous motor has the advantages of large excited magnetic potential, markedly shortened axial magnetic circuit, uneasy saturation, large airgap flux density, high motor power density, and the like; and the motor is suitable to be applied to high-performance drive and power generation occasions on which the length of the motor is limited.
Description
Technical field
The present invention relates to a kind of axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor, belong to the hybrid exciting synchronous motor field.
Background technology
Hybrid exciting synchronous motor is the air-gap field scalable with respect to the magneto biggest advantage, and effective air gap magnetic field adjustable range is to weigh the key factor of mixed excitation electric machine performance.
Two kinds of magnetic flux paths are generally arranged in the hybrid exciting synchronous motor; Main magnetic circuit and axial magnetic circuit; Mainly regulate main air-gap flux, so the size adjustment of axial magnetic flux is that the axial magnetic circuit design is most important in mixed excitation electric machine designs through the magnetic flux of regulating in the axial magnetic circuit.
The most of axial magnetic circuit of existing hybrid exciting synchronous motor is through the motor stator part; Particularly pass through stator cage; Its representative configurations is that Britain scholar E.Spooner and Japanese scholar doctor T.Mizuno propose and the rotor magnetic pole Splittable hybrid exciting synchronous motor of research, this type motor case even comprise end cover structure and receive magnetic Circuit Design with material and limit that the axial magnetic Louis is saturated; And rotor permanent magnet is the surface-mount type structure, and air gap flux density is on the low side.Another kind of rotor magnetic shunt hybrid exciting synchronous motor, axial magnetic circuit only passes through the N utmost point magnetic conductor of rotor, S utmost point magnetic conductor and magnetic conduction bridge, simple in structure, axial magnetic is short out, and axial magnetic flux is easier to regulate.But in order to guarantee sectional area and the embedded space of magnetic conduction bridge on the axial magnetic conductor magnetic circuit direction around excitation winding; The N utmost point or S utmost point magnetic conductor elongated end need expand outwardly, and the length of stator winding short circuit part must be avoided in the extension like this, makes the motor axial length long partially; And the window section of magnetic conduction bridge is long-pending limited; Make excitation magnetic potential less, influence the magnetic field adjustable range of motor, use difficulty in the application scenario that some motor length is restricted.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to the above-mentioned background technology, and a kind of axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor is provided.
The present invention adopts following technical scheme for realizing the foregoing invention purpose:
A kind of axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor; Be included in and the stator be made up of armature core and armature winding be housed in the casing and rotating shaft is housed places the synchronous machine that rotor constituted in the stator by what N utmost point pole shoe, S utmost point pole shoe and tangential magnetization permanent magnet were formed; Wherein, The N utmost point of rotor and S utmost point pole shoe extend to same direction vertically; Each N utmost point or S utmost point pole shoe external diameter extend unchangeably; Gather in the annular pole shoe, each S utmost point of rotor or N utmost point pole shoe stretch along same direction and are the contraction of bottleneck shape simultaneously, gather in the hollow cylinder pole shoe; Annular pole shoe and hollow cylinder pole shoe align with the outer wall and the inwall that are fixed on the annular magnetic conduction bridge that motor rear end covers respectively, and the hollow cylinder pole shoe that annular pole shoe and stretching forms respectively and be fixed on the axial additional air gap that certain-length is arranged between outer wall and the inwall of the annular magnetic conduction bridge that motor rear end covers.
The present invention adopts technique scheme, has following beneficial effect:
(1) do not need the stator shaft orientation magnetic circuit fully, stator cage is the same with the conventional synchronization motor with end cap etc., need not special permeability magnetic material and structural design.
(2) additional air gap be axially, makes the magnetic conduction bridge easy to assembly, and has significantly increased the window area and the each several part physical dimension of placing excitation winding in the magnetic conduction bridge, excitation magnetic potential more greatly and magnetic circuit be difficult for saturated.
(3) it is constant that the rotor magnetic conductor extends footpath, process China and foreign countries vertically, need not avoid the termination portion length of stator armature winding, reduced the axial length of motor greatly, improved the power density of motor.
(4) compare with rotor magnetic pole Splittable hybrid exciting synchronous motor, the axial magnetic circuit of motor significantly shortens, and rotor permanent magnet is the tangential magnetization configuration, and air gap flux density is high.
(5) compare with rotating rectifier formula brushless synchronous machine, saved rotating rectifier, simplify electric machine structure greatly, improved functional reliability, and be easy to electric operation, realize starting-generating integration.
Description of drawings
Fig. 1 is axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor structure chart.
Fig. 2 is rotating pole-piece and the constant extended structure figure of external diameter vertically thereof.
Fig. 3 is rotating pole-piece and pinned sheepshank composition thereof.
Fig. 4 is annular magnetic conduction bridge construction figure.
Fig. 5 is 4 pairs of pole axis magnetic flux path figure in additional air gap rotor magnetic shunt hybrid exciting synchronous motor.
Fig. 6 is the air gap flux density waveform of motor under the different exciting magnetic potential.
Symbol description among the figure: 1, casing; 2, stator core; 3, S utmost point pole shoe and extension thereof; 4, N utmost point pole shoe and extension thereof; 5, armature winding; 6, annular magnetic conduction bridge; 7, excitation winding; 8, electric motor end cap; 9, permanent magnet; 10, rotating shaft.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to invention:
Axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor involved in the present invention has two kinds of implementations; First kind of scheme is: the N utmost point of rotor extends with the vertically mutually same direction of S utmost point pole shoe; Each N utmost point pole shoe external diameter extends unchangeably; Gather in the annular pole shoe, each S utmost point pole shoe of rotor stretches along same direction and is the contraction of bottleneck shape simultaneously, gathers in the hollow cylinder pole shoe; Annular pole shoe and hollow cylinder pole shoe respectively be fixed on outer wall and the inwall that motor rear end covers annular magnetic conduction bridge and align; Be the external diameter that the external diameter of annular pole shoe equals annular magnetic conduction bridge outer wall, the internal diameter of hollow cylinder pole shoe equals the internal diameter of annular pole shoe, and the axial additional air gap of certain-length is arranged between pole shoe and the magnetic conduction bridge; Second kind of scheme is: the N utmost point of rotor extends with the vertically mutually same direction of S utmost point pole shoe; Each S utmost point pole shoe external diameter extends unchangeably; Gather in the annular pole shoe, each N utmost point pole shoe of rotor stretches along same direction and is the contraction of bottleneck shape simultaneously, gathers in the hollow cylinder pole shoe; Annular pole shoe and hollow cylinder pole shoe respectively be fixed on outer wall and the inwall that motor rear end covers annular magnetic conduction bridge and align; Be the external diameter that the external diameter of annular pole shoe equals annular magnetic conduction bridge outer wall, the internal diameter of hollow cylinder pole shoe equals the internal diameter of annular pole shoe, and the axial additional air gap of certain-length is arranged between pole shoe and the magnetic conduction bridge.
Combine accompanying drawing that first kind of implementation of axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor done concrete analysis at present; The structure chart of axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor is as shown in Figure 1: the N utmost point is corresponding with annular magnetic conduction bridge with the axial additional air gap that S utmost point magnetic conductor end formed by stretching is passed through certain width again, and axially additional air gap should be less than main air gap.The Wai Qiaobi of annular magnetic conduction bridge and interior bridge wall are corresponding with the hollow cylinder pole shoe that the annular pole shoe and the stretching of S utmost point magnetic conductor of N utmost point magnetic conductor stretching formation form respectively; Be that the external diameter of magnetic conduction bridge equals the stretch external diameter of the annular pole shoe that forms of N utmost point magnetic conductor, the internal diameter of annular magnetic conduction bridge equals the internal diameter that S utmost point magnetic conductor bottleneck shape shrinks the hollow cylinder pole shoe that forms.The excitation winding embedding is in annular magnetic conduction bridge; Annular magnetic conduction bridge is fixed on the end cap; The hollow cylinder pole shoe that rotating shaft and the stretching of S utmost point magnetic conductor form closely cooperates, i.e. rotating shaft equals the internal diameter of hollow cylinder pole shoe at hollow cylinder pole-piece external diameter, but should be less than the internal diameter of annular magnetic conduction bridge at the external diameter of annular magnetic conduction bridge section rotating shaft; Make rotating shaft not touch and be fixed on the annular magnetic conduction bridge on the end cap, the structure of annular magnetic conduction bridge is as shown in Figure 4.The N utmost point, S utmost point magnetic conductor and annular magnetic conduction bridge are used magnetic property permeability magnetic material preferably, all available common metal material of rotating shaft and casing.
N utmost point magnetic conductor prolongs the constant stretching of axial external diameter and gathers in the structure of annular pole shoe as shown in Figure 2; S utmost point magnetic conductor stretched and be the bottleneck shape along same direction shrink in the hollow cylinder pole shoe, for being increased in the sectional area that shrinks changeover portion, avoid saturated at the axial magnetic circuit that shrinks changeover portion, can establish a chamfer in the contraction section inboard, its structure is as shown in Figure 3.In order to reduce the weight of motor; When not influencing axial magnetic circuit uiform section principle; Can the live part that S utmost point pole shoe armature core surrounds is inboard by cylindrical excision; Make rotor become hollow cylinder, so also increased the distance of S utmost point magnetic conductor, reduced the leakage field of changeover portion at changeover portion by the live part that armature core surrounds.
Can be known that by Fig. 5 exist simultaneously axially and the radial flux path in the axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor, the radial flux path is shown in black dotted lines among the figure, the axial magnetic flux path is shown in solid black lines among the figure:
The main flux path of the every utmost point permanent magnet of motor master air gap part is: the permanent magnet N utmost point à rotor N utmost point pole shoe à master air gap à armature tooth à of the portion armature yoke à of the portion armature tooth à master of the portion air gap à rotor S utmost point pole shoe à permanent magnet S utmost point;
The axial magnetic flux path is: the axially additional air gap 1 à annular of permanent magnet N utmost point à rotor N utmost point pole shoe and extension à thereof the magnetic conduction axially additional air gap 2 à rotor S utmost point pole shoe extensions of bridge à and the S utmost point pole shoe à permanent magnet S utmost point.Main dependence is regulated the excitation magnetic potential size and is changed the axial magnetic flux size and then change main air-gap flux size,
It is thus clear that when the excitation winding in the annular magnetic conduction bridge did not have exciting current, because additional air gap is less with respect to main air gap, mainly by the additional air gap of axial magnetic circuit process, magnetic flux was less in the main air gap for the permanent magnet magnetic flux, motor is in weak magnetic state; When excitation winding fed a certain direction exciting current, excitation field can hinder the axial magnetic flux that permanent magnet produces, thereby increases main air-gap flux; When excitation winding feeds the opposite direction electric current, can further weak magnetic.
Shown in Figure 6 is the air gap flux density curve of axially additional air gap rotor magnetic shunt mixed excitation electric machine under forward 4000AT excitation magnetic potential and zero excitation.Can find out that by figure the main air gap flux density size of motor receives the control of electric current in the excitation winding, show that the axially additional air gap rotor magnetic shunt hybrid exciting synchronous motor of invention has good magnetic field adjusting function.
Claims (1)
1. one kind is axially added air gap rotor magnetic shunt hybrid exciting synchronous motor; Be included in and the stator be made up of armature core and armature winding be housed in the casing and rotating shaft is housed places the synchronous machine that rotor constituted in the stator by what N utmost point pole shoe, S utmost point pole shoe and tangential magnetization permanent magnet were formed; It is characterized in that: the N utmost point of rotor and S utmost point pole shoe extend to same direction vertically; Each N utmost point or S utmost point pole shoe external diameter extend unchangeably; Gather in the annular pole shoe; Each S utmost point of rotor or N utmost point pole shoe stretch along same direction and are the contraction of bottleneck shape simultaneously; Gather in the hollow cylinder pole shoe, annular pole shoe and hollow cylinder pole shoe align with the outer wall and the inwall that are fixed on the annular magnetic conduction bridge that motor rear end covers respectively, and the hollow cylinder pole shoe that annular pole shoe and stretching forms respectively and be fixed on the axial additional air gap that certain-length is arranged between outer wall and the inwall of the annular magnetic conduction bridge that motor rear end covers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100944495A CN102638146A (en) | 2011-04-15 | 2011-04-15 | Axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor |
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| CN2011100944495A CN102638146A (en) | 2011-04-15 | 2011-04-15 | Axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor |
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| CN102638146A true CN102638146A (en) | 2012-08-15 |
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| CN2011100944495A Withdrawn CN102638146A (en) | 2011-04-15 | 2011-04-15 | Axial additional airgap rotor magnetic-shunt type hybrid excitation synchronous motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780039A (en) * | 2014-01-16 | 2014-05-07 | 南京航空航天大学 | Rotor circuit double-ended excitation type hybrid excitation electrical machine |
| CN104716801A (en) * | 2015-03-11 | 2015-06-17 | 南京航空航天大学 | Mixed excitation synchronous motor with combined rotor cores internally provided with retained magnetic bridges |
| CN116191801A (en) * | 2023-01-18 | 2023-05-30 | 南京航空航天大学 | Bearingless hybrid excitation synchronous motor and suspension control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761131A (en) * | 2005-11-17 | 2006-04-19 | 南京航空航天大学 | Synchro motor of mixed exitation of tangential magnet steel possessing divided magnetic circuit |
| US20070284961A1 (en) * | 2006-06-09 | 2007-12-13 | Akeshi Takahashi | Permanent Magnet Synchronous Motor, Rotor of the Same, and Compressor Using the Same |
| CN101227130A (en) * | 2007-11-19 | 2008-07-23 | 哈尔滨工业大学 | Rotor magnetic field direct controlling mixed excitation synchronous machine |
-
2011
- 2011-04-15 CN CN2011100944495A patent/CN102638146A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1761131A (en) * | 2005-11-17 | 2006-04-19 | 南京航空航天大学 | Synchro motor of mixed exitation of tangential magnet steel possessing divided magnetic circuit |
| US20070284961A1 (en) * | 2006-06-09 | 2007-12-13 | Akeshi Takahashi | Permanent Magnet Synchronous Motor, Rotor of the Same, and Compressor Using the Same |
| CN101227130A (en) * | 2007-11-19 | 2008-07-23 | 哈尔滨工业大学 | Rotor magnetic field direct controlling mixed excitation synchronous machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780039A (en) * | 2014-01-16 | 2014-05-07 | 南京航空航天大学 | Rotor circuit double-ended excitation type hybrid excitation electrical machine |
| CN104716801A (en) * | 2015-03-11 | 2015-06-17 | 南京航空航天大学 | Mixed excitation synchronous motor with combined rotor cores internally provided with retained magnetic bridges |
| CN104716801B (en) * | 2015-03-11 | 2017-10-31 | 南京航空航天大学 | A kind of built-in magnetic conduction bridge composite fabricated rotor hybrid exciting synchronous motor unshakable in one's determination |
| CN116191801A (en) * | 2023-01-18 | 2023-05-30 | 南京航空航天大学 | Bearingless hybrid excitation synchronous motor and suspension control method thereof |
| CN116191801B (en) * | 2023-01-18 | 2023-12-01 | 南京航空航天大学 | Bearingless hybrid excitation synchronous motor and suspension control method thereof |
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Application publication date: 20120815 |