CN105827041A - Low-water-head hydro-generator - Google Patents
Low-water-head hydro-generator Download PDFInfo
- Publication number
- CN105827041A CN105827041A CN201610337310.1A CN201610337310A CN105827041A CN 105827041 A CN105827041 A CN 105827041A CN 201610337310 A CN201610337310 A CN 201610337310A CN 105827041 A CN105827041 A CN 105827041A
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- generator
- air gap
- hydro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/141—Stator cores with salient poles consisting of C-shaped cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A low-water-head small hydro-generator relates to a small hydro-generator structure. The output current of the hydro-generator is pulsed direct current. The defect that the existing low-water-head small hydro-generator has a complex structure, especially, air gap adjustment is very difficult and a high water head is required during installation is overcome. The hydro-generator comprises a rotor and a stator, and is characterized in that the rotor is made of permanent magnets, the stator is formed by installing N open cores in a case and winding the open cores with coils, and the rotor is installed inside the stator. Compared with the traditional generator structure, the copper wire winding area is increased significantly, and the air gap between the stator and the rotor can be less than or equal to 1mm.
Description
Technical field
The present invention relates to a kind of small hydro turbine structure.
Background technology
During small hydraulic turbine generating set produces at present, excitation system is indispensable part in power station equipment.Excitation system includes field power supply and excitation unit, and wherein the main body of field power supply is exciter or exciting transformer；Excitation unit, then according to different specifications, model and use requirement, is combined by regulation screen, control panel, demagnetization screen and a few part of rectifier cubice respectively.1, in order to enable hydraulic turbine speed governing, hydraulic turbine structure must be provided with flow control device such as stator；Governing system Main Function: maintain generating unit speed near rated speed, meet primary frequency regulation of power network requirement；The frequency stable of power system depends primarily on the balance of active power in system, and when system lacks meritorious, system frequency just declines, and when system active power is many, system frequency just rises.The main task of hydrogovernor is to safeguard that when the race of engine unit is about rated value, and regulate rated value using 50HZ as frequency realize power adjustments when generating electricity by way of merging two or more grid systems while, and maintain frequency in the range of 50+-Man-made Dead, one hydrogovernor of good performance, can ensure that the safe and reliable of generating set and power system, and the technical-economic index .2 of generating set and power system can be improved, grid-connected require that generating set output voltage must be that 50HZ is sinusoidal wave, therefore low head water turbine magnetic pole logarithm is a lot of or arranges gear speedup case and adjusts；3, requiring that hydraulic turbine magnetic pole logarithm is a lot, this results in rotor weight and volume is big, and rotor and generator unit stator concentricity requirement are high, and therebetween gap about at 3-5mm, this adds increased complexity and the installation difficulty of production technology, moreover owing to air gap is big, increase excitation difficulty.
Summary of the invention
Present invention aim at: provide a kind of low water head small hydro turbine, its output electric current is pulse direct current, which overcomes existing low water head small hydro turbine structure complicated, and when especially installing, air gap volume regulation difficulty is high, and head requires high defect.
The technical scheme is that a kind of low water head small hydro turbine, including rotor, stator, it is characterized in that: rotor uses permanent magnet to make, stator uses in N number of open core is installed on a casing, coil around the home on open core, rotor is installed in stator, is greatly increased copper cash coiling area with conventional electric generators structure ratio, and between stator and rotor, air gap is smaller than equal to 1mm.
Further described a kind of low water head small hydro turbine, it is characterised in that: open core is c-type or Qian shaped as frame iron core, each c-type or Qian shaped as frame iron core, can independently adjust and air gap between rotor.
Further described a kind of low water head small hydro turbine, it is characterized in that: by stator voltage rectification, with MPPT pressure regulation inversion grid connection, the frequency of turbine-generator units just can be regulated by regulation networking power, without following the tracks of the fixed frequency of electrical network, so that the hydraulic turbine is operated in more efficient frequency, and speed regulator and field regulator can be cancelled.
The present invention has the beneficial effects that: generator amature uses permanent magnetism, the frequency of turbine-generator units just can be regulated by regulation networking power, it is not necessary to follows the tracks of the fixed frequency of electrical network, so that the hydraulic turbine is operated in more efficient frequency, thus cancel electrical excitation system, electromotor cost is greatly reduced.With c-type or Qian shaped iron core, it is greatly increased copper cash coiling area, thus there occurs basic change with conventional electric generators structure.This electromotor is used on hydrogenerator, produces and simplifies, is quite convenient to mount, on-the-spot stator core is many groups of independent one-tenth, after it installs rotor more independently installed, being independent of each other, also make the convenient adjustment of air gap between stator and rotor, its precision adjustable value is less than or equal to 1mm.
Accompanying drawing explanation
Fig. 1 is structural scheme of mechanism of the present invention.
In figure:Stator 1, open core 2,3, stator axis 4, engine foundation 5, rotor 6, air gap 7, coiling 8.
Detailed description of the invention
A kind of low water head small hydro turbine, including rotor 6, stator 1, rotor 6 uses permanent magnet to make, stator 1 uses on open core 2,3 coil around the home to make, stator 1 uses in 8 open cores 2,3 are installed on a casing, coil around the home on open core 2,3, rotor 6 is installed in stator 1, it is greatly increased copper cash coiling 8 area with conventional electric generators structure ratio, between stator 1 and rotor 6, air gap 7 is smaller than equal to 1mm, open core 2,3 is that c-type or Qian shaped as frame iron core, each c-type or Qian shaped as frame iron core can independently adjust and air gap between rotor；Stator voltage rectification uses MPPT pressure regulation inversion grid connection identical with solar grid-connected principle, so frequency of turbine-generator units just can be regulated by regulation networking power, without following the tracks of the fixed frequency of electrical network, so that the hydraulic turbine is operated in more efficient frequency, and speed regulator and field regulator can be cancelled.
Claims (3)
1. a low water head small hydro turbine, including rotor, stator, is characterized in that: rotor uses permanent magnet to make, and stator uses in N number of open core is installed on a casing, and coil around the home on open core, rotor is installed in stator.
2. a kind of low water head small hydro turbine, it is characterised in that: open core is that between c-type or Qian shaped as frame iron core, each c-type or Qian shaped as frame iron core and rotor, air gap independently adjusts, and between stator and rotor, air gap is smaller than equal to 1mm.
3. a kind of low water head small hydro turbine as described in one of claim 1-2, it is characterised in that: by stator voltage rectification, with MPPT pressure regulation inversion grid connection, cancel tradition speed regulator and field regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337310.1A CN105827041A (en) | 2016-05-21 | 2016-05-21 | Low-water-head hydro-generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610337310.1A CN105827041A (en) | 2016-05-21 | 2016-05-21 | Low-water-head hydro-generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105827041A true CN105827041A (en) | 2016-08-03 |
Family
ID=56530077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610337310.1A Pending CN105827041A (en) | 2016-05-21 | 2016-05-21 | Low-water-head hydro-generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105827041A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3713015A (en) * | 1971-02-09 | 1973-01-23 | Bosch Gmbh Robert | Alternating current generator having a twin pm rotor which is adjustable in response to output voltage |
| CN203788115U (en) * | 2014-04-08 | 2014-08-20 | 程永治 | Dual-stator and dual-rotor energy-saving motor and high-efficiency magnetic cycle mechanical-and-electrical-integrated energy-saving motor |
| CN205657518U (en) * | 2016-05-21 | 2016-10-19 | 赣州天目领航科技有限公司 | Low water head hydraulic generator |
-
2016
- 2016-05-21 CN CN201610337310.1A patent/CN105827041A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3713015A (en) * | 1971-02-09 | 1973-01-23 | Bosch Gmbh Robert | Alternating current generator having a twin pm rotor which is adjustable in response to output voltage |
| CN203788115U (en) * | 2014-04-08 | 2014-08-20 | 程永治 | Dual-stator and dual-rotor energy-saving motor and high-efficiency magnetic cycle mechanical-and-electrical-integrated energy-saving motor |
| CN205657518U (en) * | 2016-05-21 | 2016-10-19 | 赣州天目领航科技有限公司 | Low water head hydraulic generator |
Non-Patent Citations (1)
| Title |
|---|
| ALIREZA KHALIGH等: "《环境能源发电：太阳能、风能、海洋能》", 31 July 2013, 机械工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chan et al. | An axial-flux permanent-magnet synchronous generator for a direct-coupled wind-turbine system | |
| Zhang et al. | A new topology of low speed doubly salient brushless DC generator for wind power generation | |
| Potgieter et al. | Design of new concept direct grid-connected slip-synchronous permanent-magnet wind generator | |
| Beik et al. | High-voltage hybrid generator and conversion system for wind turbine applications | |
| McMahon et al. | Design and testing of a 250 kW medium-speed brushless DFIG | |
| Wang et al. | A novel dual-rotor bidirectional flux-modulation PM generator for stand-alone DC power supply | |
| Stuebig et al. | Electromagnetic design of a 10 MW permanent magnet synchronous generator for wind turbine application | |
| Kamiev et al. | Hybrid excitation synchronous generators for small hydropower plants | |
| Wirtayasa et al. | Design of an axial-flux permanent-magnet generator (AFPMG) 1 kW, 220 volt, 300 rpm, 1 phase for pico hydro power plants | |
| RU151437U1 (en) | MAGNETO ELECTRIC MACHINE | |
| CN205657518U (en) | Low water head hydraulic generator | |
| Melcescu et al. | Finite element analysis of a wind generator with two counter-rotating rotors | |
| Beik et al. | High voltage generator for wind turbines | |
| Dranca et al. | Comparative Design Analysis of Two Modular Permanent Magnet Synchronous Generators | |
| Farah et al. | Kool Mμ powder core used in a flux switching linear electrical machine for electricity generation from the oceanic wave | |
| Potgieter et al. | Design specifications and optimisation of a directly grid-connected PM wind generator | |
| Khan et al. | Impact of direct-drive WEC Systems on the design of a small PM wind generator | |
| CN105827041A (en) | Low-water-head hydro-generator | |
| CN102710083B (en) | Hybrid-excited brushless DC wind power generator | |
| You et al. | Optimal design of a distributed winding type axial flux permanent magnet synchronous generator | |
| Mellah et al. | Design and analysis of an external-rotor internal-stator doubly fed induction generator for small wind turbine application by fem | |
| CN104836405A (en) | Shaftless synchronization exciter and work method thereof | |
| Zhang et al. | Design and analysis of 50KW dual-stator brushless doubly-fed generator for wind turbine | |
| CN204835872U (en) | Exciter alternator | |
| Latoufis et al. | Comparison of Coreless and Soft Magnetic Composite Core Axial Flux Permanent Magnet Generators for Locally Manufactured Pico-Hydro Plants |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160803 |
|
| WD01 | Invention patent application deemed withdrawn after publication |