CN102497047A - Novel permanent magnetism auxiliary exciter rotor structure - Google Patents
Novel permanent magnetism auxiliary exciter rotor structure Download PDFInfo
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- CN102497047A CN102497047A CN2011103608443A CN201110360844A CN102497047A CN 102497047 A CN102497047 A CN 102497047A CN 2011103608443 A CN2011103608443 A CN 2011103608443A CN 201110360844 A CN201110360844 A CN 201110360844A CN 102497047 A CN102497047 A CN 102497047A
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- rotor structure
- permanent magnetism
- magnetic
- magnet yoke
- auxiliary exciter
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Abstract
The invention discloses a novel permanent magnetism auxiliary exciter rotor structure. An annular magnet yoke is internally provided with a rotating shaft, and a permanent magnet and a pole shoe are locked on the magnet yoke tightly at peripheral of the annular magnet yoke through a stainless steel screw. According to the invention, the stainless steel screw is employed to directly fix the pole shoe and the permanent magnet on the magnet yoke together, compared with a present rotor structure of a bound permanent magnetism auxiliary exciter, weftless glass riband and nonmagnetic filling materials are cancelled, not only are component processing and assembling operation convenient, but also air gap is small, a magnetic leakage coefficient is small, magnetic steel utilization rate is high, and performance is good, stable and reliable.
Description
Technical field
The present invention relates to the permanent magnet generator field, especially the supporting rotor structure of the brushless excitation system of turbo generator with the permanent magnetism pilot exciter.
Background technology
Before the last century the nineties, 100MW and above turbo generator adopt four minimal type hidden pole type lamination armature synchronous generators to work as exciter, and adopt pilot exciter as the main exciter power supply.In early days, adopt inductor machine, during this electric motor starting, need extraneous excitation power supply, during unit operation, keep constant-pressure operation by controlled self-excited constant voltage device as pilot exciter.Because inductor pilot exciter band is the controlled rectification load, and the influence of rotor double wedge and cross-magnetizing armature reaction, the causes voltage wave distortion is bigger; Because the effect of rotor double wedge and air-flow, noise of motor is bigger, also because the existence of self-excited constant voltage device has increased the exciter control system unreliable factor.
After the last century the nineties, generally adopt permanent magnetic motor, be used for brushless excitation, can overcome the serious shortcoming that descends of voltage that the short circuit of controllable silicon self-shunt excitation system causes as pilot exciter; In order to improve the exciter control system reliability of operation, reduce turbo generator and lose excitation suddenly and move to electric power system and bring harm, adopt magneto-electric generator as pilot exciter, thereby improve the reliability of turbo generator set significantly.
The magneto pilot exciter has following advantage:
1, adopt the magneto rotor, need not extraneous excitation, can save excitation winding, brush and slip ring, thereby electric machine structure is simple, rotor with regard to there not being the loss of excitation problem, does not receive external interference yet, and operational reliability is high.
2, need not excitation and self-excited constant voltage device, operation and control appliance are simple, and the operation maintenance workload is little.
3, the electromotive force waveform is good, and it is little to generate heat, and noise is low, and efficient is high.
The structure of current permanent magnetism pilot exciter mainly contains two kinds, and one is Lundell, and one is the permanent magnet binding-type.
Like Fig. 1, shown in Figure 2; Claw-pole permanent magnet pilot exciter rotor is made up of the annulus 103 of 101,102 and axial chargings of ring flange of two band pawls; The pawl number of the ring flange of two band pawls equates (equaling the half the of number of poles); About two ring flanges involutory, pawl staggers extremely each other, is uniformly distributed along the circumference.Permanent magnet 103 is clipped in the middle of two band pawl ring flanges, and a ring flange dewclaw is the N utmost point, and another ring flange dewclaw is the S utmost point, forms the multisegmented rotor that polarity is different, stagger each other, and the pawl on the ring flange plays pole shoe.Be illustrated as 16 utmost point rotors.For fear of magnetic shunt, rotating shaft should be adopted non-magnetic steel, if be with in the rotating shaft non-magnetic ring (being generally brass) so rotating shaft also can adopt the magnetic steel manufacturing.There is following shortcoming in this motor: the complex structure of the pawl utmost point, make difficulty and when taking a lot of work; When generator speed height or capacity are big, the extremely suffered centrifugal force of pawl is very big, needs to adopt special security measure, and suitably increases rotor airgap; The large percentage of the pawl utmost point and the shared rotor volume of ring flange; Compare with other magnetoes, motor quality increases; The pulsation loss of pawl in extremely is bigger, makes decrease in efficiency.
Shown in Figure 3 is the structure of binding-type permanent magnetism pilot exciter rotor; Be made up of pole shoe 201, permanent magnet 202, no latitude glass tape 203, nonmagnetic substance 204, magnetic material lining 205, rotating shaft 206, there is following shortcoming in this motor: (1) rotor is wrapped up no latitude glass tape outward, and the thickness of wrapping is 3mm at least; Be equivalent to increase air gap; This has increased the air gap magnetic pressure and has fallen, and has increased magnetic leakage factor, has reduced the permanent magnetic material utilance; (2) non-magnetic filler material 204, and generally with copper material or aluminium, processing technology is complicated; (3) air gap is little between the rotor, and the no latitude glass tape 203 of outsourcing is abraded easily, causes the accident.
Summary of the invention
The applicant is poor to the manufacturability of above-mentioned two kinds of primary structures; Magnetic leakage factor is big; Weak point such as less economical; Provide that a kind of parts are easy to process, assembly manipulation convenient, functional, reliable and stable novel permanent magnetic pilot exciter rotor structure, to satisfy the characteristics of steam turbine generator system high-stability requirement.
The technical scheme that the present invention adopted is following:
A kind of novel permanent magnetic pilot exciter rotor structure has rotating shaft in annular yoke set inside, permanent magnet and pole shoe is locked on the yoke through stainless steel screw in annular yoke periphery.
Beneficial effect of the present invention is following:
The present invention adopts stainless steel screw that pole shoe and the direct rake of permanent magnet are combined on the yoke; Than the rotor structure of existing binding-type permanent magnetism pilot exciter, cancelled no latitude glass tape and non-magnetic filler material, not only parts are easy to process, assembly manipulation convenient; And air gap is little; Magnetic leakage factor is little, and the magnet steel utilance is high, and is functional, reliable and stable.
Description of drawings
Fig. 1 is the cutaway view of claw-pole permanent magnet pilot exciter rotor.
Fig. 2 is the front view of Fig. 1, broken section.
Fig. 3 is the cutaway view of binding-type permanent magnetism pilot exciter rotor.
Fig. 4 is a cutaway view of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention is described.
As shown in Figure 4; Novel permanent magnetic pilot exciter rotor structure of the present invention has rotating shaft 5 in annular yoke 4 set inside; Permanent magnet 2 and pole shoe 1 are locked on the yoke 4 through stainless steel screw 3 in annular yoke 4 peripheries, the quantity of stainless steel screw 3 is calculated according to mechanical strength and is confirmed.
The present invention adopts stainless steel screw that pole shoe and the direct rake of permanent magnet are combined on the yoke; Than the rotor structure of existing binding-type permanent magnetism pilot exciter, cancelled no latitude glass tape and non-magnetic filler material, not only parts are easy to process, assembly manipulation convenient; And air gap is little; Magnetic leakage factor is little, and the magnet steel utilance is high, and is functional, reliable and stable.
Claims (1)
1. a novel permanent magnetic pilot exciter rotor structure has rotating shaft (5) in annular yoke (4) set inside, it is characterized in that: permanent magnet (2) and pole shoe (1) are locked on the yoke (4) through stainless steel screw (3) in annular yoke (4) periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103608443A CN102497047A (en) | 2011-11-15 | 2011-11-15 | Novel permanent magnetism auxiliary exciter rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103608443A CN102497047A (en) | 2011-11-15 | 2011-11-15 | Novel permanent magnetism auxiliary exciter rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102497047A true CN102497047A (en) | 2012-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103608443A Pending CN102497047A (en) | 2011-11-15 | 2011-11-15 | Novel permanent magnetism auxiliary exciter rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102497047A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746531A (en) * | 2014-02-17 | 2014-04-23 | 山东唐骏欧铃汽车制造有限公司 | Power-driven compartment transport vehicle radial permanent magnet drive motor |
| CN103762793A (en) * | 2014-02-17 | 2014-04-30 | 山东唐骏欧铃汽车制造有限公司 | Production method of radial permanent-magnet rotor of drive motor of power-driven transport van |
| CN109546775A (en) * | 2018-12-26 | 2019-03-29 | 河南森源重工有限公司 | Embedded no magnetic bridge rotor and magneto |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128798Y (en) * | 1992-08-22 | 1993-03-24 | 天津市电机总厂 | Permanent-magnet salient pole synchronous motor rotor |
| CN201674295U (en) * | 2010-06-08 | 2010-12-15 | 浙江玛拓驱动设备有限公司 | Fixed structure of permanent magnet |
| CN202374070U (en) * | 2011-11-15 | 2012-08-08 | 中电电机股份有限公司 | Rotor structure for novel permanent magnet pilot exciter |
-
2011
- 2011-11-15 CN CN2011103608443A patent/CN102497047A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2128798Y (en) * | 1992-08-22 | 1993-03-24 | 天津市电机总厂 | Permanent-magnet salient pole synchronous motor rotor |
| CN201674295U (en) * | 2010-06-08 | 2010-12-15 | 浙江玛拓驱动设备有限公司 | Fixed structure of permanent magnet |
| CN202374070U (en) * | 2011-11-15 | 2012-08-08 | 中电电机股份有限公司 | Rotor structure for novel permanent magnet pilot exciter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746531A (en) * | 2014-02-17 | 2014-04-23 | 山东唐骏欧铃汽车制造有限公司 | Power-driven compartment transport vehicle radial permanent magnet drive motor |
| CN103762793A (en) * | 2014-02-17 | 2014-04-30 | 山东唐骏欧铃汽车制造有限公司 | Production method of radial permanent-magnet rotor of drive motor of power-driven transport van |
| CN103762793B (en) * | 2014-02-17 | 2016-05-04 | 山东唐骏欧铃汽车制造有限公司 | A kind of electronic transport van drive motors radial permanent magnet method for production of rotor |
| CN103746531B (en) * | 2014-02-17 | 2016-06-08 | 山东唐骏欧铃汽车制造有限公司 | A kind of power-driven compartment transport vehicle radial permanent magnet drive motor |
| CN109546775A (en) * | 2018-12-26 | 2019-03-29 | 河南森源重工有限公司 | Embedded no magnetic bridge rotor and magneto |
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Application publication date: 20120613 |
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| WD01 | Invention patent application deemed withdrawn after publication |