CN101951045A - Rotor structure of composite excitation salient-pole turbogenerator - Google Patents
Rotor structure of composite excitation salient-pole turbogenerator Download PDFInfo
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- CN101951045A CN101951045A CN 201010251762 CN201010251762A CN101951045A CN 101951045 A CN101951045 A CN 101951045A CN 201010251762 CN201010251762 CN 201010251762 CN 201010251762 A CN201010251762 A CN 201010251762A CN 101951045 A CN101951045 A CN 101951045A
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Abstract
The invention relates to a rotor structure of a composite excitation salient-pole turbogenerator, belonging to the technical field of electric motors. The invention solves the problem of overhigh rotor temperature rise caused when the current density of a rotor winding is increased in the traditional turbogenerator which adopts a single electric excitation mode to generate a main magnetic field. The rotor structure of the composite excitation salient-pole turbogenerator comprises a magnetic pole, a magnet yoke, a permanent magnet and separation magnets, wherein the magnetic pole is fixed on the magnet yoke and comprises a pole body, an exciting winding and a pole shoe; the exciting winding is wound on the pole body; the middle position on the surface of the pole body is provided with a groove, the permanent magnet is embedded into the groove, and the separation magnets are respectively filled between both sides of the permanent magnet and two side walls of the groove. The invention is suitable for the large-scale salient-pole synchronous turbogenerator.
Description
Technical field
The present invention relates to a kind of composite excitation salient pole rotor of steam turbo generator structure, belong to technical field of motors.
Background technology
The excitation system of existing turbo generator generally adopts electric excitation mode, the electricity excitation mode has easy realization, regulate flexibly, the advantage of the easy adjusting of air-gap field simultaneously, but its exciting power is provided by electric excitation magnetic potential fully, excitation loss is bigger, can cause electric efficiency on the low side, as shown in Figure 9, the single electric excitation structure that generally adopts for the synchronous turbo generator of present large-scale salient pole, its main field is produced by the DC excitation electric current fully, its rotor winding mainly adopts naked flat copper line or the logical direct current of aluminium row to produce main field, increase along with capacity motor, the current density of rotor winding also needs corresponding raising, and this just causes the rising of temperature of rotor, even surpasses rated temperature-rise.Permanent magnetic material since substantially not consumed energy, not do not pollute and the magnetic energy product height, and be widely used.Along with the continuous improvement of permanent magnetic material such as neodymium iron boron, SmCo performance, its thermal stability and corrosion resistance all are improved, and price also progressively reduces simultaneously.
Summary of the invention
The objective of the invention is in order to solve the existing turbo generator that adopts single electric excitation mode to produce main field, when improving the current density of its rotor winding, can cause the too high problem of rotor temperature rise, a kind of composite excitation salient pole rotor of steam turbo generator structure is provided.
The present invention includes magnetic pole and yoke, magnetic pole is fixed on the yoke, and magnetic pole is made up of pole body, excitation winding and pole shoe, twines excitation winding on the pole body, and it also comprises permanent magnet and every magnet,
The centre position is provided with groove on the pole body surface, and groove is embedded in permanent magnet, fills every magnet respectively between the two side of permanent magnet both sides and groove.
Advantage of the present invention is:
The present invention proposes a kind of excitation structure of the synchronous turbo generator of salient pole of composite excitation, adopt the permanent magnet and the excitation winding of this structure to produce main field simultaneously, the excitation magnetic potential that can utilize permanent magnet to produce fully, reduce the power of original excitation winding, reduce the current density of direct current energising in the excitation winding thus, reduced the temperature rise that the direct current energising produces rotor in the excitation winding, reduced the influence that motor caused because rotor temperature rise is too high, it has further improved excitation magnetic potential simultaneously.
Description of drawings
Fig. 1 is execution mode two described structural representations of the present invention; Fig. 2 is execution mode three described structural representations of the present invention; Fig. 3 is the current direction of execution mode five described excitation winding and the magnetic direction schematic diagram of permanent magnet, and it adopts execution mode two described rotor structures; Fig. 4 is the current direction of execution mode five described excitation winding and the magnetic direction schematic diagram of permanent magnet, and it adopts execution mode three described rotor structures; Fig. 5 when adopting the described rotor structure of execution mode two, the magnetic line of force distribution map of permanent magnet separately; Fig. 6 when adopting the described rotor structure of execution mode two, the magnetic line of force distribution map of independent excitation winding; Fig. 7 when adopting the described rotor structure of execution mode three, the magnetic line of force distribution map of permanent magnet separately; Fig. 8 when adopting the described rotor structure of execution mode three, the magnetic line of force distribution map of independent excitation winding; Fig. 9 is the rotor structure schematic diagram of existing turbo generator.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 and Fig. 2, present embodiment comprises magnetic pole 1 and yoke 2, magnetic pole 1 is fixed on the yoke 2, magnetic pole 1 is made up of pole body 1-1, excitation winding 1-2 and pole shoe 1-3, pole body 1-1 goes up and twines excitation winding 1-2, it also comprises permanent magnet 3 and every magnet 4
The centre position is provided with groove on the pole body 1-1 surface, and groove is embedded in permanent magnet 3, fills respectively every magnet 4 between the two side of permanent magnet 3 both sides and groove.
Operation principle: the present invention adopts high-performance permanent magnet 3, the magnetic field magnetic direction that energising produces with excitation winding 1-2 that in use requires the magnetic pole modes of emplacement of permanent magnet 3 to produce is consistent, an air-gap field part provides by permanent magnet 3 thus, and a part provides by DC excitation winding 1-2.When empty load of motor moved, the exciting current of control excitation winding 1-2 reduced it; When motor was in nominal load, the exciting current that can improve excitation winding 1-2 improved the intensity of main field.In order to reduce the leakage flux of permanent magnet 3, place every magnet 4 in permanent magnet 3 both sides, can avoid permanent magnet 3 in rotor core self, to form the circulation magnetic circuit.Owing to adopt the cause of permanent magnet 3, adopt the capacity of former excitation system of the synchronous turbo generator of salient pole of this structure to reduce, can dwindle the adjustable range of DC excitation simultaneously, improve the stability of former excitation system.
Embodiment two: below in conjunction with Fig. 1 present embodiment is described, the difference of present embodiment and execution mode one is that the groove of pole body 1-1 is arranged on the pole body 1-1 and the abutting end of pole shoe 1-3, and the upper end of groove is connected with pole shoe 1-3.Other composition and annexation are identical with execution mode one.
Embodiment three: below in conjunction with Fig. 2 present embodiment is described, present embodiment is that with the difference of execution mode one the groove upper end of pole body 1-1 is connected with pole shoe 1-3, and the lower end is connected with yoke 2.Other composition and annexation are identical with execution mode one.
Present embodiment is placed between the recess sidewall of permanent magnet 3 and pole body 1-1 every magnet 4, on pole body 1-1 every magnet 4 outer felt around excitation winding 1-2, at last by special process with permanent magnet 3, fix every magnet 4 and excitation winding 1-2.
Embodiment four: the difference of present embodiment and execution mode three is that described is non-magnetic stainless steel material every magnet 4.Other composition and annexation are identical with execution mode three.
Embodiment five: below in conjunction with Fig. 3 to Fig. 8 present embodiment is described, present embodiment is that described excitation winding 1-2 is identical with the magnetic direction of permanent magnet 3 to the further specifying of execution mode one, two, three or four.Other composition and annexation are identical with execution mode one, two, three or four.
The excitation field direction that the step mode of exciting current produces among the excitation winding 1-2 requires consistent with the magnetic direction of permanent magnet 3 generations, can not weaken mutually.
When adopting the described rotor structure of execution mode two, by among Fig. 5 and Fig. 6 as can be seen, the magnetic line of force of its two kinds of excitation modes distributes basic identical, satisfies the excitation principle of stacking.The magnetic field intensity that is provided by permanent magnet 3 can reach 0.5T separately, can significantly reduce the electrical current of excitation winding 1-2 under the electric excitation mode thus, and then reduces temperature of rotor.
When adopting the described rotor structure of execution mode three, by among Fig. 7 and Fig. 8 as can be seen, the magnetic line of force of its two kinds of excitation modes distributes basic identical, satisfies the excitation principle of stacking.The magnetic field intensity that is provided by permanent magnet 3 can reach 0.4T separately, and its air gap flux density can be regulated by regulating permanent magnet 3 thickness.
Claims (5)
1. composite excitation salient pole rotor of steam turbo generator structure, it comprises magnetic pole (1) and yoke (2), magnetic pole (1) is fixed on the yoke (2), magnetic pole (1) is made up of pole body (1-1), excitation winding (1-2) and pole shoe (1-3), pole body (1-1) is gone up and is twined excitation winding (1-2), it is characterized in that: it also comprises permanent magnet (3) and every magnet (4)
The centre position is provided with groove on pole body (1-1) surface, and groove is embedded in permanent magnet (3), fills respectively every magnet (4) between the two side of permanent magnet (3) both sides and groove.
2. composite excitation salient pole rotor of steam turbo generator structure according to claim 1 is characterized in that: the groove of pole body (1-1) is arranged on the pole body (1-1) and the abutting end of pole shoe (1-3), and the upper end of groove is connected with pole shoe (1-3).
3. composite excitation salient pole rotor of steam turbo generator structure according to claim 1 is characterized in that: the groove upper end of pole body (1-1) is connected with pole shoe (1-3), and the lower end is connected with yoke (2).
4. composite excitation salient pole rotor of steam turbo generator structure according to claim 3 is characterized in that: described is non-magnetic stainless steel material every magnet (4).
5. according to claim 1,2,3 or 4 described composite excitation salient pole rotor of steam turbo generator structures, it is characterized in that: described excitation winding (1-2) is identical with the magnetic direction of permanent magnet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010251762 CN101951045A (en) | 2010-08-12 | 2010-08-12 | Rotor structure of composite excitation salient-pole turbogenerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010251762 CN101951045A (en) | 2010-08-12 | 2010-08-12 | Rotor structure of composite excitation salient-pole turbogenerator |
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| CN101951045A true CN101951045A (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010251762 Pending CN101951045A (en) | 2010-08-12 | 2010-08-12 | Rotor structure of composite excitation salient-pole turbogenerator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195379A (en) * | 2011-05-19 | 2011-09-21 | 薛生军 | Improved magnet pole combined motor |
| CN105811620A (en) * | 2016-05-11 | 2016-07-27 | 山东理工大学 | Electromagnetic hybrid type excitation generator with built-in radial permanent magnet steels and salient poles |
| CN107834796A (en) * | 2017-09-21 | 2018-03-23 | 哈尔滨理工大学 | A kind of magnetic flux memory formula magnetic gear compound machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5371426A (en) * | 1990-11-20 | 1994-12-06 | Seiko Epson Corporation | Rotor of brushless motor |
| CN1461096A (en) * | 2003-06-12 | 2003-12-10 | 国家磁浮交通工程技术研究中心 | Permanent magnetic and electromagnetic composite excitation long-stator linear synchronous motor |
| EP1705783A1 (en) * | 2005-03-25 | 2006-09-27 | Hitachi, Ltd. | Generator and electric generating system |
| US20070090713A1 (en) * | 2005-10-26 | 2007-04-26 | Mitsubishi Electric Corporation | Hybrid-excited rotating machine, and vehicle with the hybrid-excited rotating machine |
| CN101599665A (en) * | 2009-06-22 | 2009-12-09 | 哈尔滨理工大学 | A kind of rotor of permanent-magnetic wind driven generator |
| CN201717694U (en) * | 2010-08-12 | 2011-01-19 | 哈尔滨理工大学 | Rotor structure of hybrid excitation salient pole steam turbine generator |
-
2010
- 2010-08-12 CN CN 201010251762 patent/CN101951045A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5371426A (en) * | 1990-11-20 | 1994-12-06 | Seiko Epson Corporation | Rotor of brushless motor |
| CN1461096A (en) * | 2003-06-12 | 2003-12-10 | 国家磁浮交通工程技术研究中心 | Permanent magnetic and electromagnetic composite excitation long-stator linear synchronous motor |
| EP1705783A1 (en) * | 2005-03-25 | 2006-09-27 | Hitachi, Ltd. | Generator and electric generating system |
| US20070090713A1 (en) * | 2005-10-26 | 2007-04-26 | Mitsubishi Electric Corporation | Hybrid-excited rotating machine, and vehicle with the hybrid-excited rotating machine |
| CN101599665A (en) * | 2009-06-22 | 2009-12-09 | 哈尔滨理工大学 | A kind of rotor of permanent-magnetic wind driven generator |
| CN201717694U (en) * | 2010-08-12 | 2011-01-19 | 哈尔滨理工大学 | Rotor structure of hybrid excitation salient pole steam turbine generator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195379A (en) * | 2011-05-19 | 2011-09-21 | 薛生军 | Improved magnet pole combined motor |
| CN105811620A (en) * | 2016-05-11 | 2016-07-27 | 山东理工大学 | Electromagnetic hybrid type excitation generator with built-in radial permanent magnet steels and salient poles |
| CN107834796A (en) * | 2017-09-21 | 2018-03-23 | 哈尔滨理工大学 | A kind of magnetic flux memory formula magnetic gear compound machine |
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Application publication date: 20110119 |