CN104201808B - A kind of composite excitation fault-tolerant motor system based on position automatic detection - Google Patents
A kind of composite excitation fault-tolerant motor system based on position automatic detection Download PDFInfo
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- CN104201808B CN104201808B CN201410460767.2A CN201410460767A CN104201808B CN 104201808 B CN104201808 B CN 104201808B CN 201410460767 A CN201410460767 A CN 201410460767A CN 104201808 B CN104201808 B CN 104201808B
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a kind of composite excitation fault-tolerant motor system based on position automatic detection, including stator, rotor, permanent magnet, armature tooth, fault-tolerant teeth, armature coil and magnet exciting coil；Armature coil it is wound with on armature tooth；Magnet exciting coil is sleeved on stator fault-tolerant teeth；Rotor is embedded in permanent magnet；All permanent magnets constitute permanent magnetic field, and all magnet exciting coils constitute electricity excitation magnetic field；Described permanent magnet is put together in the one end near described rotor axis by two magnetic stripes symmetrical along rotor radial, opens one or more notch along q axle magnetic circuit direction and formed one or more every magnetosphere in rotor between a pair permanent-magnet pole.Relative to traditional permagnetic synchronous motor, the present invention increases every magnetosphere along q axle magnetic circuit direction in rotor, it is advantageously implemented zero low cruise of position Sensorless Control, further increase reliability and the fault-tolerant ability of motor driven systems, also help the torque output improving motor further simultaneously.
Description
Technical field
The present invention relates to a kind of motor, particularly relate to a kind of composite excitation fault-tolerant motor based on position automatic detection.
Background technology
Internal permanent magnet synchronous motor has torque and exports big, speed-regulating range width, power density and efficiency advantages of higher,
Many high-grade drives fields are widely used.And it is contour in New-energy electric vehicle, wind-power electricity generation and Aero-Space
Performance driving field, all reliability to drive system propose the highest requirement.Current conventional built-in type permanent-magnet synchronizes electricity
Machine there are still permanent magnet demagnetization and adjustment of field excitation difficult problem, and does not considers the fault freedom of motor, it is impossible to meets system
Reliability requirement and fault-tolerant operation ability.
It addition, in realizing motor driven systems high performance control, generally require and utilize position sensor accurately to examine
Measure position and the tach signal of motor, but the installation of extra position sensor not only increase the cost of control system,
And reduce the reliability of system.For solving the problem that traditional mechanical sensor brings to system, position automatic detection technology, i.e.
Sensorless Control Technique becomes the study hotspot of Motor Control Field.And zero low cruise one of permagnetic synchronous motor
It is directly that position Sensorless Control faces subject matter.High Frequency Injection is highly suitable for based on position-sensor-free control
Zero low cruise of the permagnetic synchronous motor of system, but the method requires that motor has the most saliency, and therefore, appropriate design is built-in
Formula permagnetic synchronous motor is advantageously implemented electric machine without position sensor zero low cruise, thus is more beneficial for improving further driving
The fault freedom of motor.Based on above-mentioned background, develop a kind of composite excitation fault-tolerant motor based on position automatic detection and drive
Dynamic system, it will help meet the above-mentioned requirement to motor driven systems.
Summary of the invention
Technical problem: for above-mentioned prior art and deficiency thereof, the present invention intends proposing mixing based on position automatic detection and encourages
Magnetic-capacity mistake electric system, it is achieved electric machine without position sensor controls zero low cruise, that improves further motor driven systems can
By property and fault freedom.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of composite excitation fault-tolerant motor system based on position automatic detection, including stator, rotor, permanent magnet, armature tooth,
Fault-tolerant teeth, armature coil and magnet exciting coil；Armature tooth and fault-tolerant teeth are uniformly distributed along stator inner ring is circumferentially-spaced, and armature
The facewidth of tooth and the facewidth of fault-tolerant teeth are unequal；Armature coil it is wound with, for monolayer concentratred winding, two adjacent monolayers on armature tooth
Being isolated by fault-tolerant teeth between concentratred winding, the armature coil on two armature tooths diametrically is connected into a phase；Excitation wire
Snare is contained on stator fault-tolerant teeth, and magnet exciting coil head and the tail successively are composed in series a set of single-phase central excitation winding；Rotor is embedded
Enter permanent magnet；All permanent magnets constitute permanent magnetic field, and all magnet exciting coils constitute electricity excitation magnetic field；It is characterized in that: described forever
Magnet is put together in the one end near described rotor axis by two magnetic stripes symmetrical along rotor radial；In described rotor one
Open one or more notch between permanent-magnet pole along q axle magnetic circuit direction, formed one or more every magnetosphere.
Total number of teeth of armature tooth and fault-tolerant teeth is the multiple of 2m, and total number of teeth of armature tooth and fault-tolerant teeth and permanent magnet
The difference of number of pole-pairs is ± 2, and wherein m is the number of phases of motor.
Described stator and rotor core are stalloy, ferrum, cobalt, nickel and alloy thereof.
Described permanent magnet is the permanent magnet materials such as neodymium iron boron, Rare-Earth Cobalt or aluminum nickel cobalt.
Described in magnetosphere, it is provided with the non-magnet material such as aluminum or copper.
Electric system of the present invention, structure and performance remain conventional internal formula permagnetic synchronous motor torque output big,
The advantages such as speed-regulating range width, power density and efficiency are high；On excitation mode, have employed permanent magnet excitation and electrical excitation two kinds is encouraged
Magnetic mode, solves permanent magnet demagnetization and adjustment of field excitation difficult problem；On rotor structure, increase by one along q axle magnetic circuit direction
Or multiple every magnetosphere, be conducive to improving further reliability and the fault-tolerant ability of motor driven systems.
Beneficial effect:
Compared with prior art, the method have the advantages that
(1) permanent magnet in rotor is arranged in " V " type, and the existing radial magnetizing of permanent magnet has again cutting orientation magnetizing, in active set
Magnetic flux, improves exerting oneself of motor, has the advantages such as speed-regulating range width, power density and efficiency are high simultaneously；
(2) one or more every magnetosphere along the increase of q axle magnetic circuit direction in rotor, axial effectively along q to increase
Air gap, reduces q axle inductance, increases the difference of d axle inductance and q axle inductance, advantageously accounts for zero in position Sensorless Control low
Speed operation problem, further increases reliability and the fault-tolerant ability of motor driven systems, also helps raising further simultaneously
The torque output of motor
(3) use redundant electric excitation, when permanent magnet occurs demagnetization or loss of excitation fault, can be produced by electrical excitation winding
Excitation field, maintain motor rotation, improve the fault-tolerant ability of motor；
(4) armature winding on stator is centralized winding, and end is short, it is simple to installs, does not has the fault-tolerant teeth conduct of winding
Flux circuit, is simultaneously achieved the isolation in motor circuit, magnetic circuit and temperature field between phase and phase, improves the reliability of motor
With fault-tolerant operation ability；
(5) from the angle of design of electrical motor, the failure tolerant of electric motor and controller system is considered, including the demagnetization of motor
Or mechanical pick-up device fault in loss of excitation fault, phase fault or open fault, phase winding fault and electric machine control system, it is achieved
The runnability of the highly reliable and strong fault tolerance of motor.
Accompanying drawing explanation
Fig. 1 is electric machine structure schematic diagram of the present invention.
Wherein: 1 stator, 2 rotors, 3 permanent magnets, 4 armature tooths, 5 fault-tolerant teeths, 6 armature coils, 7 magnet exciting coils, 8 every magnetosphere.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the accompanying drawings.
It is illustrated in figure 1 a kind of composite excitation fault-tolerant motor based on position automatic detection, specially one three-phase 12 groove/10
Pole motor, including stator 1, rotor 2, permanent magnet 3, armature tooth 4, fault-tolerant teeth 5, armature coil 6, magnet exciting coil 7 and every magnetosphere 8.
Armature tooth 4 and fault-tolerant teeth 5 are uniformly distributed along stator 1 inner ring is circumferentially-spaced, and total number of teeth is the multiple (m is the number of phases of motor) of 2m,
And the facewidth of the facewidth of armature tooth 4 and fault-tolerant teeth 5 is unequal.Rotor 2 is embedded in permanent magnet 3, and permanent magnet 3 is by along rotor radial
Two symmetrical magnetic stripes are put together in the one end near rotor axis, and shape is in " V " type, and the existing radial direction of such permanent magnet is filled
Magnetic, has again cutting orientation magnetizing, and active set has suffered magnetic flux, improves the torsion of motor, and can effectively widen the velocity interval of motor.Electricity
Total number of teeth of armature tooth 4 and fault-tolerant teeth 5 is ± 2 with the difference of the number of pole-pairs of permanent magnet 3.
Armature coil 6 it is wound with, for monolayer concentratred winding, by fault-tolerant between two adjacent monolayer concentratred winding on armature tooth 4
Tooth 5 is isolated, and plays alternate Magnetic isolation, physical isolation while flux circuit providing, is thermally isolated and electrical isolation
Effect, has higher reliability and the ability that operates with failure, reduces torque pulsation.It addition, armature coil 601 and armature line
Circle 604 series connection is connected as B phase winding, armature coil 603 and electricity as A phase winding, armature coil 602 and armature coil 605
Pivot coil 606 is connected as C phase winding so that the present invention fundamentally avoids phase fault.
Magnet exciting coil 7 is sleeved on fault-tolerant teeth 5, has 6, including magnet exciting coil 701, magnet exciting coil 702, magnet exciting coil
703, magnet exciting coil 704, magnet exciting coil 705 and magnet exciting coil 706, and these 6 magnet exciting coils successively head and the tail be composed in series a set of
Single-phase central excitation winding, when there is demagnetization or loss of excitation fault in permanent magnet 3, the excitation that can be produced by electrical excitation winding 7
Magnetic field, maintains motor rotation, improves the fault-tolerant ability of motor.
In rotor 2, open one or more notch along q axle magnetic circuit direction between a pair permanent-magnet pole, formed one or more
Every magnetosphere 8, to increase along the axial effective air gap of q, reduce q axle inductance, increase the difference of d axle inductance and q axle inductance, be conducive to
Solve zero low cruise problem in position Sensorless Control, further increase the reliability of motor driven systems and fault-tolerant
Ability, also helps the torque output improving motor further simultaneously.
The operation principle of the present invention is as follows: this motor is produced main magnetic jointly by permanent magnet excitation and two kinds of excitation sources of electrical excitation
, in both magnetic potentials source, permanent magnet sources is main magnetic potential source, and electrical excitation magnetic potential is as auxiliary magnetic potential source.When motor normally works
Time, electrical excitation magnetic potential acts primarily as increase or weakens main magnetic circuit flux interaction, it is achieved motor gas-gap magnetic field scalable；Due to d axle electricity
Sense is relatively big with the difference of q axle inductance, can further improve the torque output of motor, and meanwhile, motor driven systems uses and passes without position
Sensor controls, it is to avoid mechanical pick-up device fault in drive system, improves the reliability of drive system；When motor generation permanent magnetism
Body demagnetization fault time, the single-phase electricity Exciting Windings for Transverse Differential Protection of motor be passed through permission maximum exciting current produce excitation field, with armature around
Group reciprocal action, produces enough torques, safeguards system service requirement.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a composite excitation fault-tolerant motor system based on position automatic detection, including stator (1), rotor (2), permanent magnet (3),
Armature tooth (4), fault-tolerant teeth (5), armature coil (6) and magnet exciting coil (7)；Armature tooth (4) and fault-tolerant teeth (5) are along stator inner ring
Circumferentially-spaced it is uniformly distributed, and the facewidth of the facewidth of armature tooth (4) and fault-tolerant teeth (5) is unequal；Armature tooth is wound with electricity on (4)
Pivot coil (6), for monolayer concentratred winding, is isolated, diametrically by fault-tolerant teeth (5) between two adjacent monolayer concentratred winding
Two armature tooths (4) on armature coil (6) be connected into a phase；Magnet exciting coil (7) is sleeved on stator fault-tolerant teeth (5), and encourages
Magnetic coil (7) head and the tail successively are composed in series a set of single-phase central excitation winding；Rotor (2) is embedded in permanent magnet (3)；All permanent magnetism
Body (3) constitutes permanent magnetic field, and all magnet exciting coils (7) constitute electricity excitation magnetic field；It is characterized in that: described permanent magnet (3) is by edge
Two magnetic stripes of rotor radial symmetry are put together in the one end near described rotor axis；In described rotor (2), a pair forever
Open one or more notch along q axle magnetic circuit direction between magnetic pole, formed one or more every magnetosphere (8).
A kind of composite excitation fault-tolerant motor system based on position automatic detection the most according to claim 1, it is characterised in that:
Total number of teeth of armature tooth (4) and fault-tolerant teeth (5) is the multiple of 2m, and armature tooth (4) and total number of teeth of fault-tolerant teeth (5) and permanent magnetism
The difference of the number of pole-pairs of body (3) is ± 2, and wherein m is the number of phases of motor.
A kind of composite excitation fault-tolerant motor system based on position automatic detection the most according to claim 1, it is characterised in that:
Described stator (1) and rotor (2) iron core are stalloy, ferrum, cobalt or nickel.
A kind of composite excitation fault-tolerant motor system based on position automatic detection the most according to claim 1, it is characterised in that:
Described permanent magnet (3) is neodymium iron boron, Rare-Earth Cobalt or aluminum nickel cobalt.
A kind of composite excitation fault-tolerant motor system based on position automatic detection the most according to claim 1, it is characterised in that:
Described in magnetosphere (8), it is provided with aluminum or copper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410460767.2A CN104201808B (en) | 2014-09-12 | 2014-09-12 | A kind of composite excitation fault-tolerant motor system based on position automatic detection |
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| CN201410460767.2A CN104201808B (en) | 2014-09-12 | 2014-09-12 | A kind of composite excitation fault-tolerant motor system based on position automatic detection |
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| CN104201808A CN104201808A (en) | 2014-12-10 |
| CN104201808B true CN104201808B (en) | 2016-08-31 |
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| CN105391265B (en) * | 2015-12-21 | 2018-02-23 | 东南大学 | A kind of composite excitation fault-tolerant motor system of brushless harmonic exitation |
| CN105846627A (en) * | 2016-03-24 | 2016-08-10 | 东南大学 | Rotor structure for improving permanent magnet motor power and torque density |
| CN106026597B (en) * | 2016-07-11 | 2018-08-21 | 江苏大学 | Built-in magnetic hinders formula magnetic-field-enhanced permanent-magnetic brushless motor |
| CN106877607A (en) * | 2017-04-11 | 2017-06-20 | 东南大学 | Using the winding divergence type bearingless synchronous reluctance motor of Halbach permanent magnet arrays |
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| CN109962551B (en) * | 2019-02-19 | 2020-09-08 | 华中科技大学 | Double-winding permanent magnet fault-tolerant motor |
| CN109831082B (en) * | 2019-03-05 | 2020-10-23 | 南京航空航天大学 | Built-in magnetic steel hybrid excitation motor based on brushless alternating current excitation |
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| CN110739822B (en) * | 2019-11-08 | 2020-09-15 | 南京航空航天大学 | Parallel magnetic circuit memory motor and operation method |
| CN111579989A (en) * | 2020-05-19 | 2020-08-25 | 深圳市唯真电机发展有限公司 | Motor testing method and device |
| CN112564443B (en) * | 2020-12-01 | 2021-09-07 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| CN113777530B (en) * | 2021-09-10 | 2023-07-11 | 华北电力大学（保定） | Open-circuit fault diagnosis method for rotating diode of inner rotor type three-phase brushless exciter |
| GB2618675B (en) | 2022-09-05 | 2024-07-31 | Univ Jiangsu | Permanent-magnet fault-tolerant in-wheel motor system and design methods thereof |
| CN115395854A (en) * | 2022-09-05 | 2022-11-25 | 江苏大学 | Permanent magnet fault-tolerant hub motor based on active position-sensorless strategy and driving and design method thereof |
| CN116207892B (en) * | 2023-05-04 | 2023-07-11 | 成都理工大学 | Mixed excitation motor |
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| CN203368275U (en) * | 2013-06-03 | 2013-12-25 | 东南大学 | Open winding hybrid excitation motor |
| CN103929035A (en) * | 2014-04-29 | 2014-07-16 | 江苏大学 | Fault-tolerant type single-winding bearing-less permanent magnet motor |
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| JP5574178B2 (en) * | 2010-09-29 | 2014-08-20 | アイシン・エィ・ダブリュ株式会社 | Rotating electrical machine rotor |
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| CN102208852A (en) * | 2010-03-30 | 2011-10-05 | 株式会社日立制作所 | Permanent magnet synchronous machine, and pressing or extrusion machine including permanent magnet synchronous machine |
| CN202210713U (en) * | 2011-08-26 | 2012-05-02 | 东南大学 | High reliability magnetic flux switching type motor |
| CN203368275U (en) * | 2013-06-03 | 2013-12-25 | 东南大学 | Open winding hybrid excitation motor |
| CN103929035A (en) * | 2014-04-29 | 2014-07-16 | 江苏大学 | Fault-tolerant type single-winding bearing-less permanent magnet motor |
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