CN104065225A - Multi-phase energy storing generator - Google Patents

Multi-phase energy storing generator Download PDF

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Publication number
CN104065225A
CN104065225A CN201410243510.1A CN201410243510A CN104065225A CN 104065225 A CN104065225 A CN 104065225A CN 201410243510 A CN201410243510 A CN 201410243510A CN 104065225 A CN104065225 A CN 104065225A
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CN
China
Prior art keywords
rotor
stator core
iron core
excitation winding
generator
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
Application number
CN201410243510.1A
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Chinese (zh)
Inventor
于克训
马志源
潘垣
韦忠朝
叶才勇
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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Application filed by Huazhong University of Science and Technology filed Critical Huazhong University of Science and Technology
Priority to CN201410243510.1A priority Critical patent/CN104065225A/en
Publication of CN104065225A publication Critical patent/CN104065225A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16Mechanical energy storage, e.g. flywheels or pressurised fluids

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  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a multi-phase energy storing generator. The multi-phase energy storing generator comprises a stator iron core and a rotor; the stator iron core is divided into a left section and a right section; a m armature winding is arranged in the stator iron core; an excitation winding that is an annular coil coils the stator iron core; an axis of the excitation winding is overlapped with the axis of a motor; the rotor is a salient pole structure with a solid iron core; the stator iron core and the rotor are both of vacuum sealing structures; when direct current flows through the excitation winding, and the rotor is static, space static flux density that is of different directions and alternates between the maximum value and the minimum value respectively appears in air gaps below the left section and the right section of the stator iron core due to different magnetic circuit and magnetic resistance; when the rotor rotates, the space static flux density rotates together with the rotor to generate pulsating magnetic flux induced electromotive force in the armature winding, so as to realize electromechanical energy conversion. The multi-phase energy storing generator has the energy conversion and storing functions and meets the electric energy supply system demand of the whole self power supply under an independent power supply mode.

Description

Heterogeneous energy-reserving generator
Technical field
The present invention relates to a kind of generator, be specifically related to a kind of heterogeneous energy-reserving generator.
Background technology
Under mode of operation by diesel-electric set electric supply, after diesel engine starting running, drive intermediate frequency generator to send 220V/400Hz three-phase alternating current, output 220V/400Hz/25kW three-phase and four-line exchanges, after conversion, export 24VDC/1.5kW direct current exchanges with 220V/50Hz/8kW, totally three kinds of accessory power supplys, provide whole accessory power supplys of whole onboard system work.The frequency control that all the other outputs of three-phase mid-frequency generator are mainly used in drive motor drives, and this drive motor drives high-voltage generator rotating generator, realizes the High voltage output of high-voltage energy storage generator.The voltage that high-voltage energy storage generator sends charges to energy storage capacitor through high-voltage charger, its maximum charging voltage 5kV, charge frequency 10Hz, the about 2.5MW of maximum charge power, single duty cycle maximum charge pulse number 90, launch continuously after a duty cycle at laser, the rotating speed that unit drives high-voltage generator system is by from the beginning 12000 revs/min, drop to approximately 6000 revs/min, be mainly the electric energy of high-voltage generator output by the kinetic transformation storing in high-voltage energy storage generator during this time, to complete the repeatedly trickle charge to capacitor group.After a transmitting has circulated, in 25~30 minutes essential cooling transmission intervals of generating laser, drive motor is 6000 revs/min of 12000 revs/min (the raising speed time are less than 2 minutes) that go back up at the beginning from declining by the rotating speed of high-voltage energy storage generator system again, recycle in order to next transmitting.The most crucial parts of power autonomous subsystem are high-voltage energy storage generators, and it has the effect of power conversion and stored energy system requirements.Existing high-voltage generator is fine satisfied for the function of power conversion, but be not easy to meet for the function of stored energy, and for whole power autonomous electrical energy supply system under self-powered pattern, sent the electric power supply that meets drive motor-high-voltage energy storage generator system and converters group by diesel engine drives intermediate frequency generator, it not only requires the demand that energy storage capacitor is charged under 10Hz operating mode, also will meet the power reguirements of the miscellaneous equipment in vehicle-mounted solid structure simultaneously.
Summary of the invention
The object of the invention is in order to overcome above-mentioned defect, provide one to there is power conversion and stored energy function, and can meet the heterogeneous energy-reserving generator of whole power autonomous electrical energy supply system demand under self-powered pattern.
For achieving the above object, the heterogeneous energy-reserving generator of the present invention's design, comprise stator core and rotor, described stator core is divided into two sections of left and right, in described stator core, be furnished with armature winding, in stator core, be full of excitation winding, described excitation winding is a making toroidal coil, the axis of described excitation winding overlaps with electrical axis, described rotor is the salient-pole structure of solid core, stator core and rotor are vacuum seal structure, adopt vacuum mud auxiliary, stator core and internal rotor are vacuumized with vacuum pump, in the time of the logical direct current of excitation winding and stationary rotor, due to the difference of magnetic circuit reluctance, to produce respectively direction in can the air gap under the stator core of two sections of left and right constant, between maximin, the static magnetic in the space of alternation is close, in the time of rotor, according to magnetic flux minimal path principle, the close rotation together along with rotor of the static magnetic in space, in armature winding, produce pulsating flux of magnetic induction electromotive force, realize energy converting between mechanical.
The heterogeneous energy-reserving generator of the present invention's design is the most crucial parts of power autonomous subsystem, and high-voltage power machine rotor is solid construction, is forged and is formed by steel alloy.Because rotor does not have winding and other optional equipments, therefore can High Rotation Speed, there is high reliability and high energy storage feature, motor is exported electric frequency and can directly be mated with charging pulse frequency, and system bulk is little, lightweight.
A generator for the present invention's design is a kind of special like pole formula inductor machine, and electric machine stator iron is divided into two sections of left and right, is furnished with armature winding in it, and connection is identical with conventional synchronous generator.The excitation winding of motor is a making toroidal coil, is also placed on stator, be fixed in the middle of two stator cores in left and right, and wound motor rotor, its axis overlaps with electrical axis.On rotor without any winding, and for solid core structure, can High Rotation Speed, belong to brushless excitation generator, there is high power density and high efficiency advantage, be applicable to spatial volume and the conditional occasion of weight.Electricity generating principle of the present invention: in the time that excitation winding passes to direct current and stationary rotor, due to the difference of magnetic circuit reluctance, produce respectively in air gap that can be under the stator core of two of left and right that direction is constant, the static magnetic in the space of alternation is close between maximin.In the time of rotor, the static magnetic in this space is close will be rotated together along with rotor, in armature winding, will produce pulsating magnetic flux, and then induced potential, and inductor generator is synchronous generator.
Energy storage principle of the present invention: the kinetic energy that flywheel rotor is stored , the kinetic energy stored is directly proportional to the moment of inertia J of flywheel rotor, to square being directly proportional of flywheel rotor rotating speed.This motor is that flywheel and motor are united two into one, and another effect of rotor is exactly flywheel.Motor adopts rotor without any winding, energy High Rotation Speed, and energy storage efficiency is high.
Brief description of the drawings
Fig. 1 is the structural representation that partly cuts open of the present invention;
Fig. 2 is stereochemical structure of the present invention.
In figure: 1-support; 2-stator core; 3-rotor; 4-armature winding; 5-excitation winding.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Heterogeneous energy-reserving generator as shown in Figure 1, comprise that stator is arranged on stator core 2 and the rotor 3 on support 1, stator core 2 is divided into two sections of left and right, in stator core 2, be furnished with armature winding 4, in stator core 2, be full of excitation winding 5, excitation winding 5 is making toroidal coils, the axis of excitation winding 5 overlaps with electrical axis, the salient-pole structure that rotor 3 is solid core, stator core 2 and rotor 3 are vacuum seal structure, adopt vacuum mud auxiliary, stator core 2 and rotor 3 inside are vacuumized with vacuum pump, in the time of the logical direct current of excitation winding 5 and stationary rotor, due to the difference of magnetic circuit reluctance, to produce respectively direction in can the air gap under the stator core 2 of two sections of left and right constant, between maximin, the static magnetic in the space of alternation is close, in the time of rotor, according to magnetic flux minimal path principle, the close rotation together along with rotor of the static magnetic in space, in armature winding 4, produce pulsating flux of magnetic induction electromotive force, realize energy converting between mechanical.
Master section Electromagnetic Design parameter is as shown in the table:
Rotor diameter 465 mm
Motor number of pole-pairs 8
Rated frequency 1066.67 Hz
Motor total length 450 mm
Number of stator slots 96
Motor external diameter 730 mm
Rated exciting current 8.5 A
Excitation surplus multiple 1.5
Maximum exciting current 12.8 A
Excitation rated power 1234 W
Excitation maximum power 2776 W
High-voltage energy storage generator high-speed bearing adopts high-speed bearing, by strict analytical calculation, adopts Sweden SKF imported with original packaging ultraprecise hybrid ceramic bearing, and is furnished with high-speed bearing special grease, and parameter is as follows:
1) bearing load
Unilateral magnetic force: 3.5kN
Rotor deadweight: 544.9kg
Motor speed: 6000-12000rpm
2) bearing type selecting
Because bearing rotating speed is higher, and bearing will be worked in stronger stationary magnetic field, suggestion stiff end is selected high-accuracy angular contact ball hybrid ceramic bearing 71914 CD/HCP4A of face-to-face pairing, when grease lubrication, the accessible rotating speed of single 71914 CD/HCP4A is 16000rpm, accessible rotation speed n=0.8*16000=12800rpm when pairing is used; Floating end is selected high-accuracy single-row cylinder roller hybrid ceramic bearing N 1014KTNHA/HC5SP, and the rotating speed that can reach when grease lubrication is 15000rpm.
The general principle of high-voltage energy storage generator is as follows:
A), utilize the periodicity of laser work, in the time that laser is not launched, the velocity of rotation of lifting motor rotor; And rotor is a large quality, large-sizedly has a very rotary body of large rotating inertia (mechanical energy accumulator), along with the raising of rotating speed, just store very large kinetic energy, realize inertia energy storage by High Rotation Speed;
B), in the time of Laser emission, the firm power that power demand > starts function to provide, the speed of high speed rotor just can not maintain; The rotation function that high speed rotor stores just declines, and the kinetic energy declining can just make up the deficiency of engine power; That is to say: the firm power that the release+engine of the rotation function (12000-8000 turns) storing by high speed rotor provides maintains required power of transmitting cycle of laser, thereby realize the demand that has realized system high-peak power with the engine of smaller power;
C), go round and begin again, in the time that laser is not launched, the lifting of getting back of the velocity of rotation of rotor; In the time of Laser emission, the rotation function that high speed rotor stores is released again.So effectively solve the problem of the volume weight that energy storage brings.But the problem of bringing is: because the inertia of rotating part is too large, engine cannot directly drive high-voltage motor.Moment of inertia under large like this inactive state can suffocate fire engine, that is to say that engine can not turn at all, is very crucial so how to drive high-voltage motor.
D), the High Rotation Speed of large inertia rotor, the dynamic equilibrium problems that large inertia rotor is brought.
High-voltage energy storage generator is in whole power autonomous role:
The frequency control that all the other outputs of three-phase mid-frequency generator are mainly used in drive motor drives, and this drive motor drives high-voltage generator rotating generator, realizes the High voltage output of high-voltage energy storage generator.The voltage that high-voltage energy storage generator sends charges to energy storage capacitor through high-voltage charger, its maximum charging voltage 5kV, charge frequency 10Hz, the about 2.5MW of maximum charge power, single duty cycle maximum charge pulse number 90, launch continuously after a duty cycle at laser, the rotating speed that unit drives high-voltage generator system is by from the beginning 12000 revs/min, drop to approximately 6000 revs/min, be mainly the electric energy of high-voltage generator output by the kinetic transformation storing in high-voltage energy storage generator during this time, to complete the repeatedly trickle charge to capacitor group.After a transmitting has circulated, in 25~30 minutes essential cooling transmission intervals of generating laser, drive motor is 6000 revs/min of 12000 revs/min (the raising speed time are less than 2 minutes) that go back up at the beginning from declining by the rotating speed of high-voltage energy storage generator system again, recycle in order to next transmitting.

Claims (1)

1. a heterogeneous energy-reserving generator, comprise stator core and rotor, it is characterized in that: described stator core is divided into two sections of left and right, in described stator core, be furnished with armature winding, in stator core, be full of excitation winding, described excitation winding is a making toroidal coil, the axis of described excitation winding overlaps with electrical axis, described rotor is the salient-pole structure of solid core, stator core and rotor are vacuum seal structure, adopt vacuum mud auxiliary, stator core and internal rotor are vacuumized with vacuum pump, in the time of the logical direct current of excitation winding and stationary rotor, due to the difference of magnetic circuit reluctance, to produce respectively direction in can the air gap under the stator core of two sections of left and right constant, between maximin, the static magnetic in the space of alternation is close, in the time of rotor, according to magnetic flux minimal path principle, the close rotation together along with rotor of the static magnetic in space, in armature winding, produce pulsating flux of magnetic induction electromotive force, realize energy converting between mechanical.
CN201410243510.1A 2014-06-04 2014-06-04 Multi-phase energy storing generator Pending CN104065225A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112398269A (en) * 2020-11-30 2021-02-23 华中科技大学 Stator hybrid excitation flywheel energy storage motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385251A (en) * 1981-09-28 1983-05-24 General Electric Company Flux shield for an inductor-alternator machine
US20100033037A1 (en) * 2008-08-11 2010-02-11 General Electric Company Shielding of superconducting field coil in homopolar inductor alternator
CN202167936U (en) * 2011-08-10 2012-03-14 东南大学 Flywheel energy storage apparatus
CN103683771A (en) * 2013-12-05 2014-03-26 东南大学 Like pole type inductor motor hiding salient pole

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385251A (en) * 1981-09-28 1983-05-24 General Electric Company Flux shield for an inductor-alternator machine
US20100033037A1 (en) * 2008-08-11 2010-02-11 General Electric Company Shielding of superconducting field coil in homopolar inductor alternator
CN202167936U (en) * 2011-08-10 2012-03-14 东南大学 Flywheel energy storage apparatus
CN103683771A (en) * 2013-12-05 2014-03-26 东南大学 Like pole type inductor motor hiding salient pole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吴春九: "自备电源系统高速高压脉冲交流发电机的分析与设计", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112398269A (en) * 2020-11-30 2021-02-23 华中科技大学 Stator hybrid excitation flywheel energy storage motor
CN112398269B (en) * 2020-11-30 2021-08-31 华中科技大学 Stator hybrid excitation flywheel energy storage motor

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Application publication date: 20140924