CN2919670Y - Permanent magnet synchronous generator with adjustable magnetic field - Google Patents
Permanent magnet synchronous generator with adjustable magnetic field Download PDFInfo
- Publication number
- CN2919670Y CN2919670Y CN 200620091720 CN200620091720U CN2919670Y CN 2919670 Y CN2919670 Y CN 2919670Y CN 200620091720 CN200620091720 CN 200620091720 CN 200620091720 U CN200620091720 U CN 200620091720U CN 2919670 Y CN2919670 Y CN 2919670Y
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Abstract
A permanent magnetic synchronous generator of adjustable magnetic field, pertaining to motor technology field, includes shell, stator iron core, DC excitation winding, rotor iron core, shaft, stator amarture winding, and permanent magnet. Stator iron core and rotor iron core are divided into two parts along the shaft. The divided stator iron cores connect with the shell respectively, between the divided stator iron core is positioned a ring DC excitation winding, and stator armature winding is three-phase symmetry winding, being positioned in each stator iron core; between the divided rotor iron core is positioned solid guide magnetic sleeve, and permanent magnet block and combination block of permanent magnet and ferromagnetic polar are distributed around each rotor iron core. The magnetic polarity of the neighbouring permanent magnet is opposite. Permanent magnet and ferromagnetic polar arrange in interval axial direction, i.e. permanent magnet--- ferromagnetic polar--- permanent magnet, and the polarity of the interval arranging permanent magnet polar is the same. This unity model can adjust the propotion of the magnetic pole area that the permanent magnet and electric excitation takes up to optimize the generator performance.
Description
Technical field
The utility model belongs to technical field of generators, particularly relates to the adjustable magneto alternator in a kind of magnetic field.
Technical background
The magneto alternator structure mainly contains series excitation formula, shunt excitation formula and composite type mixed excitation electric machine structure at present.Because permanent magnet generator is by permanent magnet excitation, motor is just unadjustable once making magnetic field, and the generating voltage of generator will change along with load and variations in temperature, therefore is difficult to guarantee voltage constant when loaded work piece.People such as G.Hennneberger have proposed a kind of motor of series excitation formula structure, the electric excitation winding of this motor be placed in rotor permanent magnet below, do not need to take additional space, therefore simple in structure, volume is less.But it is brush that the introducing of this construction rotor exciting current employing has, and reliability reduces.The magnetic circuit of this dispatch from foreign news agency excitation is through permanent magnet, and the magnetic permeability of permanent magnet is near the magnetic permeability of air, so the magnetic resistance of magnetic circuit is big, in order to regulate air-gap flux, must feed very big exciting current, and copper loss increases.Simultaneously, electric excitation magnetomotive force directly acts on permanent magnet, and irreversible demagnetization takes place easily.
A kind of shunt excitation formula mixing excitation permanent magnetic synchro generator that Japan scholar Nobuyuki Naoe and Tadashi Fukami propose: its structure can be thought the compound of general permanent magnet generator and electric excitation generator.The magnetic flux of each autoexcitation of exciting current and permanent magnet oneself on the segmentation rotor.But because exciting current is introduced by collector ring, the reliability of motor is reduced, be not suitable for moving under more abominable operating mode, maintenance cost increases.Simultaneously, if when wound rotor length and permanent magnet rotor equal in length, in order to produce the magnetic flux with the permanent magnet equal sizes, the exciting current that feeds wound rotor must be bigger, certainly will increase rotor copper loss, it is big that the temperature rise of motor becomes, and causes the working point of decrease in efficiency, permanent magnet to change thus even cause problem such as demagnetization.
Nanjing Aero-Space University's hole is one flat, Chen Hai town etc. proposes a kind of composite type mixed excitation electric machine structure: its electric excitation auxiliary power generation part and stator core of permanent magnet generator partial common and stator winding, magnetic flux is synthetic in air gap.The electricity excitation is utilized the part of rotating shaft as magnetic circuit, and the structure of permanent magnetism master power generation part is identical with common permanent magnet generator.The motor of this kind structure can be adjusted the output voltage of generator preferably, and operational reliability is higher, and the failure rate ratio has brush configuration and rotating rectifier low.But the both sides of the horizontal magnetic pole that the dynamo-electric excitation division of generating electricity divides all be length than small air gap, processing and assembly precision requirement are very high, when this has obviously increased the assembler and manufacturing cost.Horizontal magnetic pole and vertical pole provide path for electro-magnetic flux simultaneously, need bigger magnetic conductive area, have reduced the power density of motor.Owing to there are two additional air gaps, motor electricity magnetic excitation circuit magnetic resistance is enlarged markedly, cause exciting current bigger, efficiency of motor is not high.
People such as Algeria scholar YacineAmara have proposed a kind of shunt excitation formula mixed excitation electric machine structure, and motor stator structure and rotor structure are all too complicated, and manufacturing and assembly cost significantly increase, and the power density of motor is not high, torque ripple is bigger, and noise is bigger, and leakage field is serious.
The utility model content
At above-mentioned the deficiencies in the prior art, the utility model provides a kind of magnetic field adjustable magneto alternator, and it is by changing the distributed architecture of permanent magnet, can adjust the ratio of permanent magnet and the shared magnetic pole area of electric excitation arbitrarily, make voltage output stable, the efficient height, temperature rise is low.
Structure of the present utility model comprises housing, stator core, DC excitation winding, rotor core, rotating shaft, stator armature winding and permanent magnet, stator core is axially fixed on the housing along housing, rotor core places in the interior rotating shaft of stator core, stator core and rotor core all are divided into two sections vertically, the stator core of segmentation is connected with housing respectively, in the rotating shaft between the stator core of segmentation, be equipped with annular DC excitation winding, the stator armature winding is a three-phase symmetric winding, places respectively in each section stator coring groove; Between the rotor core of segmentation, be equipped with solid magnetic conduction sleeve, be staggeredly distributed with permanent magnet blocks and permanent magnet and magnetic pole iron combination block along each section rotor core circumference, the pole polarity of adjacent permanent magnet is opposite, and adjacent permanent magnet N, S stagger extremely mutually, the angle that staggers is less than or equal to a pole span, permanent magnet and magnetic pole iron along the two-stage rotor stalk to being spaced, i.e. permanent magnet-magnetic pole iron-permanent magnet, and spaced permanent magnet pole polarity is identical.
Operation principle of the present utility model: set out by magnetic pole iron in the magnetic field that the DC excitation electric current produces, and through air gap, stator, by air gap, finally gets back to adjacent magnetic pole iron again; Have different magnetic circuits with permanent magnet flux, but two magnetic fields are synthetic in the air gap of generator, can regulate the main flux of motor by adjusting exciting current.When load is big, the demagnetizing effect of armature reaction clearly, only rely on the magnetic flux that permanent magnet partly provides and the back electromotive force that produces is not enough, therefore, output voltage by generator itself leads in the DC excitation winding through over commutation, air-gap field is strengthened, thereby make output voltage satisfy the requirement of load.When load hour, the demagnetizing effect of armature reaction is not clearly, thereby causes output voltage with excessive.Therefore, the output voltage by generator itself leads in the DC excitation winding through over commutation, and can be reverse, and air-gap field is weakened, thereby guarantees burning voltage output.
The utility model has the advantages that and realized non-brushing, the reliability height, it is dangerous that permanent magnet does not have demagnetization in electric excitation regulation process, and leakage field is little, and electric excitation loss is little, and temperature rise is low, and higher and voltage regulation of power density and voltage-form distortion rate are low.According to the application scenario difference, can adjust the ratio of permanent magnet and the shared magnetic pole area of electric excitation arbitrarily, so that the performance of generator reaches optimum.In the bidirectional modulation process, only need very little DC excitation electric current to regulate magnetic flux, make voltage output stable, the efficient height, temperature rise is low.
Description of drawings
Fig. 1 is a structural representation of the present utility model,
Fig. 2 is permanent magnet and the magnetic pole iron distribution schematic diagram in the utility model rotor core;
1. housings among the figure, 2. stator core, 3. DC excitation winding, the 4. permanent magnet N utmost point, 5. rotor core, 6. magnetic conduction sleeve, 7. rotating shaft, 8. the permanent magnet S utmost point, 9. stator armature winding, 10. magnetic pole iron.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Embodiment: as shown in Figure 1, structure of the present utility model comprises housing 1, stator core 2, DC excitation winding 3, rotor core 5, rotating shaft 7, stator armature winding 9 and permanent magnet, stator core 2 is axially fixed on the housing along housing, rotor core 5 places in the rotating shaft 7 in the stator core 2, by bearing and sole plate supports, stator core 2 all is divided into two sections vertically with rotor core 5, the stator core 2 of segmentation is connected with housing 1 respectively, and mechanically with on the electromagnetism be connected by housing 1, between the stator core 2 of segmentation, be equipped with annular DC excitation winding 3, stator armature winding 9 is a three-phase symmetric winding, place respectively in the groove of each section stator core 2, in the rotating shaft between the rotor core 5 of segmentation, be equipped with solid magnetic conduction sleeve 6, the axial magnetic conduction that is used for rotor, be staggeredly distributed with permanent magnet blocks and permanent magnet and magnetic pole iron 10 combination block along each section rotor core 5 circumference, the pole polarity of adjacent permanent magnet is opposite, it is permanent magnet N utmost point piece, the permanent magnet S utmost point and magnetic pole iron 10 combination block are spaced on the circumference of rotor core 5, and adjacent permanent magnet N, S staggers extremely mutually, and the angle that staggers is a pole span; Permanent magnet and magnetic pole iron 10 are arranged along two-stage rotor 5 axially spaced-aparts unshakable in one's determination, it is permanent magnet-magnetic pole iron-permanent magnet, and spaced permanent magnet pole polarity is identical, specifically being arranged as in this example: the permanent magnet N utmost point-magnetic pole iron combination block, the permanent magnet N utmost point, the permanent magnet S utmost point, magnetic pole iron-permanent magnet S utmost point combination block, each two row was arranged along the circle spacing, guaranteed that the direction of magnetization of the permanent magnet under same coil is identical, formed this routine mixing excitation permanent magnetic synchro generator.
Its operation principle: set out by magnetic pole iron in the magnetic field that the DC excitation electric current produces, and through air gap, stator, by air gap, finally gets back to adjacent magnetic pole iron again; Have different magnetic circuits with permanent magnet flux, but two magnetic fields are synthetic in the air gap of generator, can regulate the main flux of motor by adjusting exciting current.
The utility model is to utilize the DC excitation winding to adjust generating voltage, the generating voltage that produces when permanent magnet excitation is lower than rated voltage when working, then can be by making soft iron magnetic pole and permanent magnet pole homophase by sense of current in the control DC excitation winding, at this moment the DC excitation winding starting increases the effect of magnetic; When the voltage of permanent magnet excitation generation is higher than rated voltage when working, then can be by making the soft iron magnetic pole opposite by sense of current in the control DC excitation winding with permanent magnet pole, at this moment the DC excitation winding plays demagnetizing effect, so just can come the magnetic field of regulator generator easily, make generator under the situation of load and variations in temperature, keep constant by the size and Orientation of electric current in the control DC excitation winding.
Claims (2)
1, the magneto alternator that a kind of magnetic field is adjustable, comprise housing, stator core, the DC excitation winding, rotor core, rotating shaft, stator armature winding and permanent magnet, stator core is axially fixed on the housing along housing, rotor core places in the interior rotating shaft of stator core, stator core and rotor core all are divided into two sections vertically, the stator core of segmentation is connected with housing respectively, it is characterized in that between the stator core of segmentation, being equipped with annular DC excitation winding, the stator armature winding is a three-phase symmetric winding, place respectively in each section stator coring groove, in the rotating shaft between the rotor core of segmentation, be equipped with solid magnetic conduction sleeve, be staggeredly distributed with permanent magnet blocks and permanent magnet and magnetic pole iron combination block along each section rotor core circumference, the pole polarity of adjacent permanent magnet is opposite, permanent magnet and magnetic pole iron along the two-stage rotor stalk to being spaced, be permanent magnet-magnetic pole iron-permanent magnet, and spaced permanent magnet pole polarity is identical.
2, the adjustable magneto alternator in a kind of magnetic field according to claim 1 is characterized in that described rotor core two ends adjacent opposite polarity permanent magnet N, S stagger extremely mutually, and the angle that staggers is less than or equal to a pole span.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620091720 CN2919670Y (en) | 2006-06-26 | 2006-06-26 | Permanent magnet synchronous generator with adjustable magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620091720 CN2919670Y (en) | 2006-06-26 | 2006-06-26 | Permanent magnet synchronous generator with adjustable magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2919670Y true CN2919670Y (en) | 2007-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620091720 Expired - Fee Related CN2919670Y (en) | 2006-06-26 | 2006-06-26 | Permanent magnet synchronous generator with adjustable magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2919670Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772880B (en) * | 2007-08-17 | 2012-07-04 | 有限公司日库技术研究所 | Magnetic flux shunt controlling dynamo-electric machine system |
| CN102570748A (en) * | 2010-12-21 | 2012-07-11 | 刘显海 | Self-starting synchronous motor with permanent magnet with magnetic declination |
| CN105763127A (en) * | 2015-01-05 | 2016-07-13 | 坎里格钻探技术有限公司 | High Speed Ratio Permanent Magnet Motor |
| CN108418375A (en) * | 2018-04-13 | 2018-08-17 | 山东大学 | A kind of multistage spoke for electric vehicle interlocks rotor permanent magnet synchronous motor and its method |
| CN109217597A (en) * | 2018-10-22 | 2019-01-15 | 沈阳工业大学 | Compound rectifier excitation amorphous alloy axial-flux electric machine |
| CN109713868A (en) * | 2019-03-04 | 2019-05-03 | 哈尔滨工业大学 | Axial parallel type multiphase permanent magnet fault-tolerant electric machine |
| CN110911083A (en) * | 2019-12-03 | 2020-03-24 | 浙江工业大学 | Magnetic field generating device with locally adjustable magnetic conductivity |
| CN112398301A (en) * | 2020-11-06 | 2021-02-23 | 山东大学 | Hybrid magnetic circuit permanent magnet synchronous motor for electric vehicle and driving method thereof |
-
2006
- 2006-06-26 CN CN 200620091720 patent/CN2919670Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772880B (en) * | 2007-08-17 | 2012-07-04 | 有限公司日库技术研究所 | Magnetic flux shunt controlling dynamo-electric machine system |
| CN102570748A (en) * | 2010-12-21 | 2012-07-11 | 刘显海 | Self-starting synchronous motor with permanent magnet with magnetic declination |
| CN105763127A (en) * | 2015-01-05 | 2016-07-13 | 坎里格钻探技术有限公司 | High Speed Ratio Permanent Magnet Motor |
| CN105763127B (en) * | 2015-01-05 | 2020-06-09 | 内博斯钻井技术美国公司 | High speed ratio permanent magnet motor |
| CN108418375A (en) * | 2018-04-13 | 2018-08-17 | 山东大学 | A kind of multistage spoke for electric vehicle interlocks rotor permanent magnet synchronous motor and its method |
| CN108418375B (en) * | 2018-04-13 | 2023-09-12 | 山东大学 | Multi-section spoke staggered rotor permanent magnet synchronous motor for electric automobile and method thereof |
| CN109217597A (en) * | 2018-10-22 | 2019-01-15 | 沈阳工业大学 | Compound rectifier excitation amorphous alloy axial-flux electric machine |
| CN109713868A (en) * | 2019-03-04 | 2019-05-03 | 哈尔滨工业大学 | Axial parallel type multiphase permanent magnet fault-tolerant electric machine |
| CN109713868B (en) * | 2019-03-04 | 2021-01-15 | 哈尔滨工业大学 | Axial parallel multiphase permanent magnet fault-tolerant motor |
| CN110911083A (en) * | 2019-12-03 | 2020-03-24 | 浙江工业大学 | Magnetic field generating device with locally adjustable magnetic conductivity |
| CN112398301A (en) * | 2020-11-06 | 2021-02-23 | 山东大学 | Hybrid magnetic circuit permanent magnet synchronous motor for electric vehicle and driving method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |