CN201887628U - Novel permanent magnet brushless single-phase synchronous generator with compound excitation mode - Google Patents
Novel permanent magnet brushless single-phase synchronous generator with compound excitation mode Download PDFInfo
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- CN201887628U CN201887628U CN2010206243216U CN201020624321U CN201887628U CN 201887628 U CN201887628 U CN 201887628U CN 2010206243216 U CN2010206243216 U CN 2010206243216U CN 201020624321 U CN201020624321 U CN 201020624321U CN 201887628 U CN201887628 U CN 201887628U
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Abstract
A novel permanent magnet brushless single-phase synchronous generator with a compound excitation mode adopts 'rare earth permanent magnet and induction brushless electric excitation' and matches with a gasoline engine to form an internal-combustion generating set as a standby single-phase alternating-current power supply. The novel permanent magnet brushless single-phase synchronous generator is characterized in that a plurality of like-polarity rare earth permanent magnets 3 distributed on the surface of a rotor iron core 6 form a magnetic pole while each lower no-load air gap magnetic field is formed to generate generator no-load voltage, single-phase current flows through a main winding 2 embedded in a slot of a stator iron core 1 when in load, an air gap negative-sequence magnetic field generated by the single-phase current inducts alternating potential in an electric excitation winding 9 in a slot close to a rear pole shoe of a rotor magnetic pole, and direct-current excitation current is generated by the aid of diodes 10 at two ends of the electric excitation winding through half-wave rectification, so that an auxiliary air gap magnetic field changing along with stator load current is generated to overcome the shortcomings of the air gap permanent magnetic field in load and keep the terminal voltage UN of the generator stable within a certain range.
Description
Technical field
The present invention is a kind of permanent-magnet brushless single phase synchronous generator with stabilized voltage characteristic, NEW TYPE OF COMPOSITE excitation mode, with gasoline engine or the supporting composition generating set of diesel engine, can be used as portable power supplies and spare emergent power source and uses.
Background technology
At present, gasoline engine generator industry mainstream model is the electric excitation generator type of brush that has based on copper cash and aluminum steel, and power bracket contains 1kW～20kW; In addition, be the small-sized single phase synchronous generator group of 1～5kW for power, also have and a kind ofly adopt the negative phase-sequence magnetic field that rotor-exciting winding induction stator load current sets up and carry out the brush-less electrically exciting mode of rectified current excitation.Wherein, adopt AVR regulate exciting current the single-phase or threephase alternator of the electric excitation of brush is arranged is the main flow excitation mode of gasoline engine generator group, the sharpest edges of this generator are exactly that automatic adjustment can be realized by regulating rotor excitation current in its magnetic field, thereby make the generator of unit operation keep the stable of output voltage to the gamut of nominal load in zero load.
Fig. 3 is a kind of conventional brushless complete electric excitation type single-phase generator structural principle schematic diagram that generally adopts, among the figure: label 1 is a stator core, label 2 is the stator main winding, label 6 is a rotor core, label 8 is for driving rotating shaft, and label 9 is electric excitation winding, and label 10 is a diode, label 12 is the stator auxiliary winding, and label 13 is a capacitor.The single-phase main winding 2 of stator, auxiliary winding 12 and excitation winding 9 that copper cash or aluminum steel are made are set on stator core 1 and rotor core 6, stator main winding 2 external supply capabilities wherein, rotor-exciting winding 9 is used for setting up motor gas-gap magnetic field, make motor produce electromagnetic induction, the stator and rotor iron core belongs to magnetic conductive part, and rotor core is fixed and driven in the rotating shaft 8.During empty load of motor, rotor remanent magnetism progressively produces induced potential in auxiliary winding, auxiliary winding constitutes the monophase current loop with the electric capacity 13 that is connected in series, this monophase current will produce the opposite positive and negative preface magnetic field of direction of rotation respectively in air gap, and the alternating potential of doubled frequency will be responded in negative phase-sequence magnetic field in rotor-exciting winding 9, constitute the halfwave rectifier loop by the diode 10 that is serially connected with rotor-exciting winding two ends, cross direct current, keep floating voltage U thereby produce in the rotor-exciting loop stream
NStable unloaded air-gap field.During motor load, the stator main winding flows through the single-phase load electric current equally, same principle and electromagnetic induction process during with zero load, to in the rotor-exciting winding, flow through the load exciting current that is directly proportional with the stator load current, keep generator voltage U thereby in motor gas-gap, produce an additional reinforced load magnetic field
NStable in certain limit; Wherein, the wiring direction in diode 10 halfwave rectifier loops is decided by motor-field N, S extreme direction and the sense of current.More than the generator excitation capacity of two kinds of complete electric excitation modes bigger, the loss ratio of rotor electricity energized circuit accounts for 55%～65% of the whole losses of motor, therefore the energy efficiency of generator is difficult to improve, and the type generator amature copper consumption also accounts for 55%～65% of the whole copper consumptions of motor, so its cost is also higher, the resource consumption of non-ferrous metals such as copper, aluminium is also big.
China is the abundantest country of rare earth permanent-magnetic material in the world, but also is the country of nonferrous metal resource poornesss such as copper, aluminium simultaneously; Therefore, the application of greatly developing rare earth material has realistic meanings to China.Progress along with control technology, rare-earth permanent-magnet electric machine drives the field in the motor industry and is used widely, the motor product that rare earth permanent-magnetic material is made, and the power density that its unit volume material transmits is big, electric efficiency height and energy consumption is little demonstrates the huge superiority of its rare-earth electric motor; But rare earth permanent-magnetic material is used the 'bottleneck' restrictions that electrical generator fields is subjected to the voltage stabilization technique always, because the generator field that permanent magnetic material is made can't be regulated, thereby cause generator voltage control very difficult, voltage descends very serious behind the motor bringing onto load, and then influence the power generating quality of permanent magnet generator unit, limited the range of application of permanent magnetic material on this type of generator.And, adopt rare earth material to replace electric excitation generator rotor winding simply by the conventional motors convention, also can not fully and up hill and dale utilize rare earth material to transmit the advantage of high-energy-density.Therefore, expand the range of application of rare earth material and just must must solve following technical barrier: one, be the advantage that makes full use of rare earth material, must research and design can transmit the permanent magnet generator new structure of high power density in the portable power source field of independent operating; Two, research overcomes magneto and can't regulate magnetic field and the technological approaches and the effective ways of stable generator voltage.
Summary of the invention
At the problem that existing industry technology exists, the purpose of present technique invention is to provide the single phase synchronous generator of the compound rectifier excitation mode of a kind of employing " rare earth permanent magnet+induction brush-less electrically exciting ".Basic design of the present invention is, employing is distributed in unloaded excitation initiating circuit and the rotor-exciting winding that permanent-magnetic field that the rare-earth permanent magnet on rotor core surface forms replaces traditional brush-less electrically exciting generator unit stator auxiliary winding and electric capacity to form, thereby sets up the needed basic air-gap field of generator electromagnetic induction.
Because the demagnetization curve of permanent magnet is a straight line, thereby it is stable in certain limit to only depend on this permanent magnetic field to be difficult to keep the generator loading terminal voltage of unit operation, the present invention utilizes the characteristics of traditional brushless complete electric excitation mode, form a magnetic pole and every unloaded air-gap field extremely down of forming is set up the generator floating voltage by the multi-disc same polarity rare-earth permanent magnet that is distributed in the rotor core surface, near the pole shoe line embedding groove is being set behind each magnetic pole of rotor core, lay electric excitation winding in the groove, the main winding that is embedded in during load in the stator core slot flows through monophase current, alternating potential is responded in the electric excitation winding in the groove near the pole shoe in the air gap negative phase-sequence magnetic field that this monophase current is set up behind rotor magnetic pole, carry out halfwave rectifier by the diode that is connected in these electricity excitation winding two ends and become the DC excitation electric current, thereby set up the auxiliary air-gap field that changes with the stator load current, the deficiency in the air gap permanent magnet magnetic field when remedying load is also kept generator voltage U
NStable in certain limit.Such technical finesse had both made full use of the characteristics of high energy product that rare-earth permanent magnet possesses, having overcome full magneto-electric generator again can not pass through to regulate excitation and the shortcoming of burning voltage, generator excitation power is significantly reduced, effectively improve energy transformation efficiency of generator, reduce the heating loss and the temperature rise of generator, can also suitably reduce simultaneously the volume of generator, reduce material consumption and unit cost, improve rotor reliability and life-span.This NEW TYPE OF COMPOSITE excitation brushless single-phase generator can with gasoline engine or the combustion engine powered generating set of the supporting composition of diesel engine, as portable power supplies or standby emergent single, three phase mains use, than traditional complete electric Exciter Sets whole aircraft reliability height, electric energy efficiency height, fuel consume saving, CO
2Discharging reduces.
For achieving the above object, illustrate generator techniques scheme and the characteristics that the present invention relates to below in conjunction with case study on implementation illustrated in figures 1 and 2:
First, the required magnetic field of generating electricity is made up of two parts: the multi-disc same polarity rare-earth permanent magnet that, distributes on the rotor core is formed a magnetic pole provides unloaded air-gap field under the required every magnetic pole of generator, guarantees that the generator unit stator main winding induces specified floating voltage; When two, keeping generator loading terminal voltage when certain limit is stablized required magnet excitation field by near be arranged on after the rotor core conrotatory veer pole shoe in the groove electric excitation winding inductive load negative phase-sequence magnetic field and after the diode halfwave rectifier, the DC excitation electric current be provided and produce to electric excitation winding.
Second, each magnetic pole pole shoe position of rotor core is equipped with multi-disc same polarity rare-earth permanent magnet side by side, permanent magnet adopts dull and stereotyped rectangular configuration and is embedded in the rectangular channel at each magnetic pole pole shoe position, same polarity magnet arrangements quantity is according to the manufacturing process decision of generator floating voltage required unloaded air-gap field size, air gap pole embrace and rare-earth permanent magnet under every magnetic pole, and its magnetic structure is the composite magnetic circuit structure of " parallel connection of same polarity magnet, the series connection of heteropolarity magnet ".Fig. 1 is the 2 pole generator structure cases that four same polarity permanent magnets are formed a magnetic pole, and Fig. 2 is the 2 pole generator structure cases that three same polarity permanent magnets are formed a magnetic pole.
The 3rd, being provided with line embedding groove near the pole shoe behind each magnetic pole of rotor core conrotatory veer, electric excitation winding is installed in the groove, this winding line end to end is connected to form half-wave rectifying circuit by the magnetic field and the sense of current by diode; Be provided with the damping copper bar between the same polarity magnet of every magnetic pole and constitute the damping winding of improving voltage waveform.
The 4th, rotor core is near near the air heat dam that is provided with the heat effect of isolation gasoline engine line shaft transmission the driving rotating shaft, intermediate location between magnetic pole has been provided with the radiating ribs of the thermolysis of blowing simultaneously, is being provided with the cooling heat dissipation hole near near the rare earth magnet under every magnetic pole.
The 5th, the stator structure feature is stator core is designed to improve the silicon steel plate stock utilization by monophase machine magnetic circuit characteristics an oblate shape, stator principal phase winding distributes by 120 ° of facies tracts that can reduce the high order harmonic component composition, does not need to install the unloaded excitation initiating circuit that auxiliary winding that unloaded excitation uses and serial connection electric capacity are formed on the stator.
Adopt the techno-economic effect that technique scheme reached:
One, product technology performance advantage and effect
The present technique invention is applicable to 1～5kW, 2～4 electrode structures, the combustion engine powered single-phase AC synchronous alternator groups that drag.
The product of this technological invention is because electric energized circuit is an additive excitation, so the resistance heating loss of rotor winding is able to effective reduction, thereby this type of generator energy delivery efficiency on average can be improved more than 5～8% than complete electric Exciter Sets, and its rotor winding temperature rise also can significantly descend.With the internal combustion unit that this type generator is formed, can reduce fuel consume more than 5～8%, thereby reduce the CO of the kW of unit number
2Discharge capacity.
Because rotor adopts permanent magnetism+brushless auxiliary electrical magnetic part mode, rotor does not have with external circuit and is electrically connected, also need not electronic building bricks such as electric capacity and AVR electricity excitation voltage regulator, thereby defectives such as electronic component damage such as tradition has insulation breakdown, the turn-to-turn of the common excitation main circuit of brush generator bad, AVR power tube have been stopped, the generator reliability improves, and the life-span prolongs.
Two, the Financial cost advantage and the effect of product
Because the rotor-exciting loop does not have brush and collector ring that tradition has the brush electric excitation generator, stator also need not to install main winding sampled signal, auxiliary winding and electric capacity, cancelled tradition the electronic building bricks such as AVR excitation voltage regulator of brushing electric excitation generator have been arranged, make the generator unit stator simplified manufacturing process, nonferrous materials is saved, unit complete machine cost descends, and its integrated cost has the brush unit to compare than the complete electric excitation with capacity on average can save 10%, thereby its economy is very remarkable.
Description of drawings
Fig. 1 is the structural principle schematic diagram that four magnets are formed a utmost point " the permanent-magnet brushless single phase synchronous generator of compound rectifier excitation mode ".
Fig. 2 is the structural principle schematic diagram that three magnets are formed a utmost point " the permanent-magnet brushless single phase synchronous generator of compound rectifier excitation mode ".
Among the above figure: 1. stator core, 2. stator main winding, 3. rare-earth permanent magnet, 4. damping copper bar and end ring, 5. cooling heat dissipation hole, 6. rotor core, 7. radiating ribs 8. drives rotating shaft, 9. electric excitation winding, 10. diode, 11. air heat dams.
Fig. 3 is traditional brushless complete electric excitation type single-phase generator structural principle schematic diagram.
Among the figure: 1. stator core, 2. stator main winding, 6. rotor core 8. drives rotating shaft, 9. electric excitation winding, 10. diode, 12. stator auxiliary winding, 13. capacitors.
Embodiment
The present invention is described further below in conjunction with the drawings and the specific embodiments:
In embodiment illustrated in figures 1 and 2, the permanent-magnet brushless single phase synchronous generator stator core (1) of a kind of NEW TYPE OF COMPOSITE excitation mode of the present invention and stator main winding (2) have brush and brush-less electrically exciting single phase synchronous generator basic identical with traditional, only stator main winding parameter changes to some extent with permanent magnetic material performance, and stator need not auxiliary winding, electric capacity or the AVR excitation voltage regulator of conventional electric generators, stator structure and technology are simpler, thereby can continue to use existing each serial state stator punching fully, be convenient to seriation, standardized production.
The brushless, permanently single-phase generator of compound rectifier excitation mode of the present invention has the brush electric excitation generator different is rotor structure with traditional:
At first, each magnetic pole pole shoe position of rotor core (6) has been installed multi-disc same polarity rare-earth permanent magnet (3) side by side and has been constituted a magnetic pole, permanent magnet adopts dull and stereotyped rectangular configuration and is embedded in the rectangular channel at pole shoe position, same polarity magnet arrangements quantity and size are according to the manufacturing process decision of generator floating voltage required unloaded air-gap field size, air gap pole embrace and rare-earth permanent magnet under each magnetic pole, and its magnetic structure is the composite magnetic circuit structure of " parallel connection of same polarity magnet, the series connection of heteropolarity magnet ".Fig. 1 has provided 2 pole generator structure cases of a magnetic pole of four same polarity permanent magnet compositions, and Fig. 2 has provided 2 pole generator structure cases of a magnetic pole of three same polarity permanent magnet compositions.Magnet arrangements mode described above and composite magnetic circuit structure are not limited only to 2 pole generators, also can promote fully to extend to 4 utmost point single phase synchronous generators.The generator amature assembly technology of this kind permanent-magnetic circuit structure is simple, and magnet steel is fit to produce in batches, and stock utilization is higher.
Second, rotor core (6) adopts the thick silicon steel plate punching out of 0.5mm to become the core stamping structure and laminates whole with driving rotating shaft (8), iron core laminates length to be changed with generator power, permanent magnet length is identical with core length, be provided with the riveted joint of damping copper bar (4) two ends and damping end ring between the same polarity magnet of every magnetic pole and constitute damping winding, to improve voltage waveform and axial compression permanent magnet.
The 3rd, be provided with line embedding groove near the pole shoe behind each magnetic pole of rotor core (6) conrotatory veer, electric excitation winding (9) is installed in the groove, this winding line end to end is connected to form half-wave rectifying circuit by the magnetic field and the sense of current by diode (10), this electricity energized circuit has closed circuit of one's own, do not have electrical coupling with external circuit, when load, play the additive excitation effect; Insulating treatment process such as this excitation winding and common coil winding, rule, wiring, dipping lacquer are just the same.
The 4th, rotor core (6) is provided with air heat dam (11) to isolate the heat that transmits from the gasoline engine line shaft near driving rotating shaft (8), intermediate location between magnetic pole is provided with radiating ribs (7) and plays the effect of blowing and dispelling the heat simultaneously, be provided with cooling heat dissipation hole (5) near near the rare earth magnet under every magnetic pole, the rotor permanent magnet working temperature is controlled in the allowed band in the time of can guaranteeing generator loading after the assembling.
Above-described only is the preferred implementation of present technique invention; for a person skilled in the art; under the prerequisite that does not break away from the present technique inventive principle; can also make some malformations and improvement; these also should be considered as the protection range of present technique invention, and these can not influence effect and practicality that the present technique invention is implemented.
Claims (5)
1. the permanent-magnet brushless single phase synchronous generator of a NEW TYPE OF COMPOSITE excitation mode, the required magnetic field that it is characterized in that generating electricity is made up of two parts: one, rotor core (6) is gone up the multi-disc same polarity rare-earth permanent magnet (3) that distributes and is formed a magnetic pole unloaded air-gap field under the required every magnetic pole of generator is provided, and assurance generator unit stator main winding (2) induces specified floating voltage; When two, keeping generator loading terminal voltage certain limit stablize required magnet excitation field when being arranged on after rotor core (6) the conrotatory veer near electric excitation winding (9) inductive load in the groove pole shoe negative phase-sequence magnetic field and after diode (10) halfwave rectifier, the DC excitation electric current be provided and produce to electric excitation winding.
2. the permanent-magnet brushless single phase synchronous generator of NEW TYPE OF COMPOSITE excitation mode according to claim 1, its architectural feature is that each magnetic pole pole shoe position of rotor core (6) is equipped with multi-disc same polarity rare-earth permanent magnet (3) side by side, permanent magnet adopts dull and stereotyped rectangular configuration and is embedded in the rectangular channel at each magnetic pole pole shoe position, the same polarity magnet arrangements quantity unloaded air-gap field size required under every magnetic pole according to the generator floating voltage, the manufacturing process decision of air gap pole embrace and rare-earth permanent magnet, its magnetic structure are the composite magnetic circuit structure of " same polarity magnet parallel connection; heteropolarity magnet series connection ".
3. the permanent-magnet brushless single phase synchronous generator of NEW TYPE OF COMPOSITE excitation mode according to claim 1, its architectural feature is to be provided with line embedding groove near the pole shoe behind each magnetic pole of rotor core (6) conrotatory veer, electric excitation winding (9) is installed in the groove, and this winding line end to end is connected to form half-wave rectifying circuit by the magnetic field and the sense of current by diode (10); Be provided with damping copper bar (4) between the same polarity magnet of every magnetic pole and constitute the damping winding of improving voltage waveform.
4. the permanent-magnet brushless single phase synchronous generator of NEW TYPE OF COMPOSITE excitation mode according to claim 1, its architectural feature is that rotor core (6) is near near the air heat dam (11) that is provided with the heat effect of isolation gasoline engine line shaft transmission the driving rotating shaft (8), intermediate location between magnetic pole has been provided with the radiating ribs (7) of the thermolysis of blowing simultaneously, is being provided with cooling heat dissipation hole (5) near near the rare earth magnet under every magnetic pole.
5. the permanent-magnet brushless single phase synchronous generator of NEW TYPE OF COMPOSITE excitation mode according to claim 1, it is characterized in that stator core (1) is designed to improve the oblate shape of silicon steel plate stock utilization by monophase machine magnetic circuit characteristics, stator principal phase winding (2) distributes by 120 ° of facies tracts that can reduce the high order harmonic component composition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206243216U CN201887628U (en) | 2010-11-25 | 2010-11-25 | Novel permanent magnet brushless single-phase synchronous generator with compound excitation mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206243216U CN201887628U (en) | 2010-11-25 | 2010-11-25 | Novel permanent magnet brushless single-phase synchronous generator with compound excitation mode |
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| CN201887628U true CN201887628U (en) | 2011-06-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480201A (en) * | 2010-11-25 | 2012-05-30 | 余虹锦 | Permanent magnet brushless single-phase synchronous generator with novel composite excitation mode |
| WO2015127691A1 (en) * | 2014-02-27 | 2015-09-03 | 睿能机电有限公司 | Imbedded permanent magnet rotor for direct-current brushless motor |
| CN108809032A (en) * | 2017-05-04 | 2018-11-13 | 通用电气公司 | The motor based on permanent magnet of torque with raising |
-
2010
- 2010-11-25 CN CN2010206243216U patent/CN201887628U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480201A (en) * | 2010-11-25 | 2012-05-30 | 余虹锦 | Permanent magnet brushless single-phase synchronous generator with novel composite excitation mode |
| WO2015127691A1 (en) * | 2014-02-27 | 2015-09-03 | 睿能机电有限公司 | Imbedded permanent magnet rotor for direct-current brushless motor |
| CN108809032A (en) * | 2017-05-04 | 2018-11-13 | 通用电气公司 | The motor based on permanent magnet of torque with raising |
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Granted publication date: 20110629 Termination date: 20121125 |