CN106026578A - Reluctance rotor field modulation double-stator brushless doubly-fed motor - Google Patents

Reluctance rotor field modulation double-stator brushless doubly-fed motor Download PDF

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Publication number
CN106026578A
CN106026578A CN201610603030.0A CN201610603030A CN106026578A CN 106026578 A CN106026578 A CN 106026578A CN 201610603030 A CN201610603030 A CN 201610603030A CN 106026578 A CN106026578 A CN 106026578A
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CN
China
Prior art keywords
stator
rotor
winding
magnetic
motor
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CN201610603030.0A
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Chinese (zh)
Inventor
程明
朱新凯
韩鹏
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东南大学
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Priority to CN201610603030.0A priority Critical patent/CN106026578A/en
Publication of CN106026578A publication Critical patent/CN106026578A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/16Stator cores with slots for windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/04Machines with one rotor and stators

Abstract

The invention provides a reluctance rotor field modulation double-stator brushless doubly-fed motor. The motor comprises two stators and one reluctance rotor which are concentrically arranged from inside to outside, wherein the external stator (1), the rotor (3) and the internal stator (8) are arranged in turn from outside to inside, an external air gap (2) is arranged between the external stator and the rotor, and an internal air gap (7) is arranged between the internal stator and the rotor. The external stator (1) comprises an external stator yoke (11), external stator teeth (12) which are arranged at the internal side of the external stator yoke (11) and power windings (10). The internal stator (8) comprises an internal stator yoke (13), internal stator teeth (14) and control windings (9). The rotor (3) comprises magnetic-conductive iron core blocks (4) and nonmagnetic-conductive material blocks (6) which are evenly distributed along a circumference. The magnetic-conductive iron core blocks (4) internally include magnetic separation slots (5). The gaps between the external stator teeth (12) form external stator slots, and the power windings (10) are embedded in the slots. The gaps between the internal stator teeth (14) form internal stator slots, and the control windings (9) are embedded in the slots.

Description

Reluctance rotor field modulation Dual-stator brushless double-fed motor

Technical field

The invention belongs to technical field of motors, particularly to a kind of bimorph transducer, magnetic resistance modulation system brushless dual-feed motor. This motor is a kind of general-purpose machine, both can be used as frequency-conversion and speed-regulation motor, it is possible to as vscf generator.Nothing Brush is reliable, controls power little, can realize smaller power transducer drive heavy-duty motor.Rotor without winding without permanent magnetism Body, simple in construction, mechanical strength is high.

Background technology

The aggravation of a series of social problems such as fossil energy shortage, environmental pollution, makes the sustainable clean energy resource of development become For inexorable trend.Wind-power electricity generation is a kind of canonic form of clean energy resource generating, in current generation of electricity by new energy market Accounting is the highest.Along with the development of wind-power electricity generation, the technology such as the volume of wind powered generator system, weight, efficiency are referred to Mark is had higher requirement, and for improving generating efficiency, reduces the cost of electricity-generating of unit capacity, and single-machine capacity more comes The biggest, 5MW wind power generating set oneself enter run, the blower fan of 10MW or more capacity is developed.Currently, extensively That applies has three class wind power generating set, respectively mouse-cage type asynchronous wind driven generator group, double-fed asynchronous wind-power electricity generation Unit and permanent magnet direct-driving aerogenerator group.Permanent magnet direct-drive unit quickly grows, and market potential is huge, but its weight With bulky, installation and maintenance difficulty, it is unfavorable at sea wind-powered electricity generation being applied.

Along with going deep into of electric machine theory research, having developed a kind of magnetic-field modulation-type brushless dual-feed motor, it comes from not Cascade control with the wound asynchronous motor of number of poles.It is simultaneously embedded in two in the stator core that this motor shares and overlaps not homopolarity The stator winding of number, the coupling between double winding is to realize by special concentric type cage-type rotor or reluctance rotor. Compared with conventional motor, the coupling between this motor double winding is poor, and internal magnetic field harmonic content is enriched, added losses Relatively big, therefore power density and the energy index of motor are relatively low, limit its popularization and application.For overcoming disadvantages mentioned above, Each experts and scholars do a lot of work on the Curve guide impeller of rotor structure, achieve certain achievement in research.But two Set winding shares a stator core, increases insulating Design difficulty, and easily causes motor saturated, increases motor Design and the difficulty manufactured, be unfavorable for promoting.

For making full use of motor internal space, after developed a kind of bimorph transducer phase-wound rotor brushless dual-feed motor, The cascade control of simulation asynchronous machine.This motor has inside and outside two stators, lays rotor between stator, and three is coaxial The heart and separate, the stator winding of the two different numbers of poles of set are individually positioned on interior external stator, and rotor both sides fluting is put Putting winding, the equal shorted on one end of winding of rotor both sides, the other end connects with phase sequence or negative-phase sequence.This structural electromotor is also May be designed to axial disk motor.This structure improves the power density of motor to a certain extent, but phase-wound rotor Structure is complicated, Design and Machining difficulty, needs to place magnetism-isolating loop in the middle of rotor, stops the coupling in magnetic field between the winding of rotor both sides Closing, the volume causing motor is bigger than normal.Therefore, high power density, high efficiency, simple in construction are developed on this basis Reliable novel brushless dual-feed motor has certain practical value.

Summary of the invention

Technical problem: it is an object of the invention to provide a kind of reluctance rotor field modulation Dual-stator brushless double-fed motor, its There is reluctance type rotor, without winding on rotor, simple and reliable for structure, the aforesaid technical problem of effective solution.

Technical scheme: the present invention a kind of reluctance rotor field modulation Dual-stator brushless double-fed motor include two stators and One reluctance rotor, three's concentric arrangement from inside to outside;Ecto-entad is followed successively by external stator, rotor, inner stator, There is outer air gap between external stator and rotor, between inner stator and rotor, have interior air gap;Described external stator includes external stator Yoke, it is arranged on the external stator tooth inside external stator yoke and power winding;Described inner stator includes inner stator yoke, decided at the higher level but not officially announced Sub-tooth and control winding;Described rotor includes the most equally distributed magnetic conductive iron block and non-magnet material block;Lead Magnetic core block is internal containing magnet isolation tank;The space of described external stator between cog forms external stator groove, groove be embedded in power around Group, the space of described inner stator between cog forms pilot trench decided at the higher level but not officially announced, and groove is embedded in control winding;

The number of pole-pairs of described power winding is pSW, the number of rotor magnetic conductive iron block is nr, control the most right of winding Number is pSC, three meets relation: nr=pSW+pSC

The position at described power winding and control winding place can exchange.

Described power winding and control winding can be all distributed winding or centralized winding.

The magnetic conductive iron block of described rotor is axially overrided to form by stalloy, or radially superposed forms.

Described stator and rotor all can make block assembled type.

Described motor can make single-phase, three-phase or heterogeneous.

Containing magnet isolation tank in the magnetic conductive iron block of described rotor, the Main Function of magnet isolation tank is to solve described magnetic conductive iron Local saturation problem in block, reduces loss.

Described magnet isolation tank does not connects with described outer air gap and interior air gap;

Described external stator and inner stator can be all salient-pole structure or non-salient pole structure.

Beneficial effect: compared with existing similar motor, have the advantage that

1. power winding and control winding and be individually positioned in external stator and inner stator, can reduce between two windings is direct Coupling, it is simple to rule, insulation system easily designs, and space availability ratio is high, compact conformation;

2. rotor is reluctance type rotor, and magnetic inductive block can form with silicon steel plate stacking, it is possible to formed by permeability magnetic material casting, As used soft-magnetic composite material die cast, without winding without permanent magnet on rotor, simple and reliable for structure, it is simple to manufacture;

3. utilize the modulating action of rotor magnetic inductive block, by changing the frequency controlling winding, it is possible to achieve the change of motor Speed constant frequency is run.

4. stator and rotor all can use modular construction, it is simple to transport and in-site installation.

5. designing magnet isolation tank in magnetic inductive block, magnet isolation tank can effectively eliminate the local saturated phenomenon on magnetic inductive block, reduces and damages Consumption, and do not interfere with the adjustable magnetic ability of magnetic inductive block.

6. magnet isolation tank does not connects with inside and outside air gap, can effectively reduce torque pulsation.

Accompanying drawing explanation

Fig. 1 is the cross section structure schematic diagram of motor of the present invention;

Fig. 2 is the cross section structure schematic diagram of the adjustable magnetic block of motor of the present invention;

Fig. 3 be motor when 250r/min, a) without the magnetic line of force scattergram of adjustable magnetic block of magnet isolation tank, B) there is the magnetic line of force scattergram of the adjustable magnetic block of magnet isolation tank;

Fig. 4 be motor when 750r/min, a) without the magnetic line of force scattergram of adjustable magnetic block of magnet isolation tank, B) there is the magnetic line of force scattergram of the adjustable magnetic block of magnet isolation tank;

Fig. 5 be motor when 250r/min, without the A phase winding counter electromotive force comparison diagram of magnet isolation tank He the motor having magnet isolation tank;

Fig. 6 be motor when 750r/min, without the A phase winding counter electromotive force of magnet isolation tank He the motor having magnet isolation tank Comparison diagram;

Detailed description of the invention

As it is shown in figure 1, external stator, rotor, inner stator concentric arrangement, from outside to inside, be followed successively by external stator 1, Outer air gap 2, rotor 3, interior air gap 7 and inner stator 8;Described inner stator 1 includes external stator yoke 11, external stator tooth 12 and embedded groove in distributed power winding 10;Described inner stator 8 includes inner stator yoke 13, inner stator tooth 14 With the distributed AC servo system winding 9 in embedded groove;Described rotor 3 includes the most equally distributed magnetic conductive iron block 4 With non-magnet material block 6, magnetic conductive iron block 4 structure as in figure 2 it is shown, internal containing magnet isolation tank 5, magnet isolation tank not with Inside and outside air gap connection.

Reluctance rotor field modulation Dual-stator brushless double-fed motor, including external stator, rotor and inner stator, three is by outward Inwardly being sequentially placed, separate, rotor is in the middle of external stator and inner stator;Gas is there is between external stator and rotor Gap, is referred to as outer air gap or the first air gap, there is also air gap between inner stator and rotor, air gap or the second gas in being referred to as Gap;Said two stator and rotor also can be sequentially arranged from left to right, constitute the reluctance rotor field of axial disk structure Modulation Dual-stator brushless double-fed motor;

Described external stator includes external stator yoke and power winding, and external stator yoke is referred to as lateral surface near the one side of rotor, Lateral surface can be notching construction, it is possible to for slotless configuration;When having fluting, power winding can be by distribution form or collection Middle form is arranged in described groove;Without fluting time, use epoxy resin power winding is directly anchored to described outside The surface of the lateral surface of stator yoke, winding also may be disposed so that distribution form or concentrated form;

Described inner stator includes inner stator yoke and controls winding, and inner stator yoke is referred to as medial surface near the one side of rotor, Described control winding is placed on medial surface, and described medial surface also includes fluting and two kinds of structures of slotless, described outside Winding arrangement on face is all applicable to control winding layout on described medial surface;

Power winding in described external stator can be joined directly together with common frequency power network without inverter, in described inner stator Control winding be connected with common frequency power network or power supply through two-way inverter;When spinner velocity changes, can be by controlling Inverter changes and controls power frequency in winding, it is ensured that the power frequency in power winding is constant, it is achieved variable speed constant frequency Run;

During control winding feed-in unidirectional current in described inner stator, reluctance rotor field modulation Dual-stator brushless double-fed motor Electrical excitation reluctance rotor field modulation dual-stator brushless synchronous motor can be evolved into, use as synchronous motor;

Winding equivalence number of pole-pairs in described external stator is pSW, winding equivalence number of pole-pairs in inner stator be pSC, turn The number of sub-magnetic inductive block is nr, three meets relation: nr=pSW+pSC

Described rotor includes spaced magnetic conductive iron block and non-magnet_conductible material block, if comprising in each magnetic inductive block A dry magnet isolation tank, its can block on magnetic inductive block part magnetic flux path, can effectively eliminate on described magnetic conductive iron block Local saturated;The pole embrace of appropriate design magnetic inductive block and magnet isolation tank size, can make the magnetic conduction ability of magnetic inductive block not It is affected because of the existence of magnet isolation tank;

The pole embrace of described magnetic inductive block is typically chosen to be 0.65-0.75, both can ensure the adjustable magnetic ability of magnetic inductive block, Also can there is space that magnet isolation tank is set;If being not provided with magnet isolation tank, in the case of the magnetic conduction ability ensureing magnetic inductive block is constant, Even if the pole embrace of selection of small, also can occur local saturated phenomenon in magnetic inductive block, motor is higher than synchronizing When speed is run, locally saturated phenomenon is even more serious;The existence of magnet isolation tank can effectively solve the problem that the local in magnetic inductive block Saturated phenomenon;

The number of the magnet isolation tank in each magnetic conductive iron block is typically chosen to be 3-5, permeable section on magnetic conductive iron block Width and the ratio of width of magnet isolation tank be 2: 1;Magnet isolation tank does not connects with inside and outside air gap, with the distance of inside and outside air gap It is typically chosen 1-2mm, so can reduce the torque pulsation of motor;

In the present embodiment, as it is shown in figure 1, the space of described external stator between cog forms external stator groove, groove is embedded Entering distributed power winding, winding connects according to certain rules, constitutes three-phase symmetric winding, is passed through three-phase symmetrical exchange 4 are formed to pole field after electricity.The space of described inner stator between cog forms pilot trench decided at the higher level but not officially announced, and groove is embedded in distributed AC servo system Winding, winding connects according to certain rules, constitutes three-phase symmetric winding, and winding is connected with electrical network through two-way inverter, 2 are formed to pole field after energising.Described rotor is by 6 magnetic inductive blocks and 6 non-magnetic block gap arrangements, circumferentially It is uniformly distributed.In each magnetic inductive block, the number of magnet isolation tank is 5, the ratio of the width of permeable section width and magnet isolation tank Being 2: 1, magnet isolation tank is not connected with inside and outside air gap, as shown in Figure 2.

Described magnetic inductive block can use stalloy to be axially overrided to form, it is possible to radially superposed forms, it is possible to applies other to lead Magnetic material die cast, such as soft-magnetic composite material;

The present invention may be designed as polyphase machine;

The operation principle of the present invention: controlling to be passed through three-phase symmetrical alternating current in winding, frequency is fc, by control with Control the connected inverter of winding and can change this frequency, thus producing number of pole-pairs in interior air gap is psc, rotate speed Degree isMagnetic field, through the modulating action of rotor magnetic inductive block, setting up number of pole-pairs outside in air gap is pswMagnetic field, The rotary speed in this magnetic field and rotary speed n of rotor and control power frequency fcRelevant, itself and the merit on external stator Rate winding linkage.Rotate with speed n if prime mover drags rotor, induction electric can be induced in power winding Gesture, external electromotive power output, the frequency of electromotive force isCan obtain through fortran, turn Sub-speedThus can be seen that, when spinner velocity changes, controlled around class frequency f by regulationc, Power can be made around class frequency fwKeep constant, it is achieved variable speed constant frequency runs.In like manner, if be passed through in power winding Alternating current, this electric current meeting and magnetic field interaction, produce electromagnetic torque, drive rotor to rotate, externally export machinery Power, by regulating frequency fc, variable-speed operation can be realized.

The foregoing is only the better embodiment of the present invention, protection scope of the present invention is not with above-mentioned embodiment It is limited, as long as those of ordinary skill in the art modify or change according to the equivalence that disclosed content is made, all The protection domain described in claims should be included in.

Claims (9)

1. a reluctance rotor field modulation Dual-stator brushless double-fed motor, it is characterised in that this motor includes two stators and a reluctance rotor, three's concentric arrangement from inside to outside;Ecto-entad is followed successively by external stator (1), rotor (3), inner stator (8), has outer air gap (2) between external stator and rotor, has interior air gap (7) between inner stator and rotor;Described external stator (1) includes external stator yoke (11), the external stator tooth (12) being arranged on external stator yoke (11) inner side and power winding (10);Described inner stator (8) includes inner stator yoke (13), inner stator tooth (14) and controls winding (9);Described rotor (3) includes the most equally distributed magnetic conductive iron block (4) and non-magnet material block (6);Magnetic conductive iron block (4) is internal containing magnet isolation tank (5);Space between described external stator tooth (12) forms external stator groove, and groove is embedded in power winding (10), and the space between described inner stator tooth (14) forms pilot trench decided at the higher level but not officially announced, and groove is embedded in control winding (9);
The number of pole-pairs of described power winding (10) is psw, the number of rotor magnetic conductive iron block (4) is nr, the number of pole-pairs controlling winding (9) is psc, three meets relation: nr=psw+psc
2. modulation Dual-stator brushless double-fed motor in magnetic resistance field as claimed in claim 1, it is characterised in that the position at described power winding and control winding place can exchange.
3. modulation Dual-stator brushless double-fed motor in magnetic resistance field as claimed in claim 1 or 2, it is characterised in that described power winding and control winding can be all distributed winding or centralized winding.
4. magnetic resistance field modulation Dual-stator brushless double-fed motor as claimed in claim 1, it is characterised in that the magnetic conductive iron block (4) of described rotor is axially overrided to form by stalloy, or radially superposed form.
5. modulation Dual-stator brushless double-fed motor in magnetic resistance field as claimed in claim 1, it is characterised in that described stator and rotor all can make block assembled type.
6. modulation Dual-stator brushless double-fed motor in magnetic resistance field as claimed in claim 1, it is characterised in that described motor can make single-phase, three-phase or heterogeneous.
7. modulation Dual-stator brushless double-fed motor in magnetic resistance field as claimed in claim 1, it is characterised in that containing magnet isolation tank in the magnetic conductive iron block of described rotor, the Main Function of magnet isolation tank is to solve the local saturation problem in described magnetic conductive iron block, reduces loss.
8. the magnetic resistance field modulation Dual-stator brushless double-fed motor as described in claim 1 or 7, it is characterised in that described magnet isolation tank does not connects with described outer air gap (2) and interior air gap (7).
9. modulation Dual-stator brushless double-fed motor in reluctance rotor field as claimed in claim 1, it is characterised in that described external stator and inner stator can be all salient-pole structure or non-salient pole structure.
CN201610603030.0A 2016-07-27 2016-07-27 Reluctance rotor field modulation double-stator brushless doubly-fed motor CN106026578A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106374707A (en) * 2016-10-31 2017-02-01 广东威灵电机制造有限公司 Motor
CN106451970A (en) * 2016-09-26 2017-02-22 东南大学 Four-electrical port brushless double-fed motor with reluctance rotor and double stators
CN106487179A (en) * 2016-11-07 2017-03-08 东南大学 Dual-stator brushless double-fed wind power generator is modulated in a kind of field
CN106787545A (en) * 2017-01-05 2017-05-31 东南大学 A kind of double-stator magneto resistance brushless wind generator of three electrical ports
CN107508417A (en) * 2017-08-23 2017-12-22 哈尔滨工程大学 A kind of low vibration motor
WO2018076486A1 (en) * 2016-10-31 2018-05-03 广东威灵电机制造有限公司 Motor
CN108494195A (en) * 2018-04-28 2018-09-04 河南宝天机电科技有限公司 A kind of double-layer chain double-stator structure disc type electric machine embedding technology
CN110048573A (en) * 2019-04-04 2019-07-23 南京航空航天大学 A kind of bimorph transducer electric excitation biconvex electrode electric machine that loss of excitation is fault-tolerant and its method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012115079A (en) * 2010-11-26 2012-06-14 Samsung Yokohama Research Institute Co Ltd Segment type switched reluctance motor
CN104092342A (en) * 2014-07-24 2014-10-08 东南大学 Magnetic resistance modulation type double-stator brushless double-fed motor
CN104883015A (en) * 2015-05-06 2015-09-02 东南大学 Dual-stator superconductive exciting field modulating motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012115079A (en) * 2010-11-26 2012-06-14 Samsung Yokohama Research Institute Co Ltd Segment type switched reluctance motor
CN104092342A (en) * 2014-07-24 2014-10-08 东南大学 Magnetic resistance modulation type double-stator brushless double-fed motor
CN104883015A (en) * 2015-05-06 2015-09-02 东南大学 Dual-stator superconductive exciting field modulating motor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451970B (en) * 2016-09-26 2018-08-21 东南大学 Four electrical port brushless dual-feed motor of reluctance rotor bimorph transducer
CN106451970A (en) * 2016-09-26 2017-02-22 东南大学 Four-electrical port brushless double-fed motor with reluctance rotor and double stators
WO2018076486A1 (en) * 2016-10-31 2018-05-03 广东威灵电机制造有限公司 Motor
CN106374707A (en) * 2016-10-31 2017-02-01 广东威灵电机制造有限公司 Motor
CN106487179A (en) * 2016-11-07 2017-03-08 东南大学 Dual-stator brushless double-fed wind power generator is modulated in a kind of field
CN106787545A (en) * 2017-01-05 2017-05-31 东南大学 A kind of double-stator magneto resistance brushless wind generator of three electrical ports
CN106787545B (en) * 2017-01-05 2019-06-25 东南大学 A kind of double-stator magneto resistance brushless wind generator of three electrical ports
CN107508417A (en) * 2017-08-23 2017-12-22 哈尔滨工程大学 A kind of low vibration motor
CN108494195A (en) * 2018-04-28 2018-09-04 河南宝天机电科技有限公司 A kind of double-layer chain double-stator structure disc type electric machine embedding technology
CN110048573A (en) * 2019-04-04 2019-07-23 南京航空航天大学 A kind of bimorph transducer electric excitation biconvex electrode electric machine that loss of excitation is fault-tolerant and its method

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Application publication date: 20161012