CN104201808A - Hybrid excitation fault tolerant motor system based on automatic position detection - Google Patents
Hybrid excitation fault tolerant motor system based on automatic position detection Download PDFInfo
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- CN104201808A CN104201808A CN201410460767.2A CN201410460767A CN104201808A CN 104201808 A CN104201808 A CN 104201808A CN 201410460767 A CN201410460767 A CN 201410460767A CN 104201808 A CN104201808 A CN 104201808A
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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
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a hybrid excitation fault tolerant motor system based on the automatic position detection. The system comprises a stator, a rotor, permanent magnets, armature teeth, fault tolerant teeth, armature coils and excitation coils. The armature coils are winded on the armature teeth, the excitation coils sleeve the fault tolerant teeth of the stator, the permanent magnets are embedded in the rotor and form the permanent magnetic field, and all the excitation coils form an electric excitation magnetic field; each permanent magnet comprises two magnetic stripes which are symmetrical about the rotor radially and which are assembled at one end adjacent to the axis of the rotor, and a pair of permanent magnetic poles in the rotor are provided with one or multiple grooves along the q-axis magnetic circuit direction to form one or multiple magnetic isolation layers. Compared with a traditional permanent magnet synchronous motor, the system has the advantages that the magnetic isolation layers are increased along the q-axis magnetic circuit direction in the rotor, the zero low-speed operation without the position sensor control can be implemented, the reliability and fault tolerance capability of the motor drive system are further improved, and the torque output of the motor can be further increased.
Description
Technical field
The present invention relates to a kind of motor, relate in particular to the self-monitoring composite excitation fault-tolerant motor of a kind of position-based.
Background technology
Internal permanent magnet synchronous motor has that torque output is large, speed-regulating range width, power density and efficiency advantages of higher, in many high-grade drives field, is widely used.And in the contour performance driving of New-energy electric vehicle, wind power generation and Aero-Space field, all the reliability of drive system has been proposed to very high requirement.Current conventional internal permanent magnet synchronous motor still exists permanent magnet demagnetization and excitation regulation difficult problem, and does not consider the fault freedom of motor, cannot meet system reliability and require and fault-tolerant operation ability.
In addition, in realizing motor driven systems high performance control, often need the position and the tach signal that utilize position transducer accurately to detect motor, but the installation of extra position transducer not only increases the cost of control system, and reduced the reliability of system.The problem of bringing to system for solving traditional mechanical pick-up device, position automatic detection technology, Sensorless Control Technique becomes the study hotspot of Motor Control Field.And the zero low cruise of permagnetic synchronous motor is to face subject matter in position Sensorless Control always.High Frequency Injection is highly suitable for the zero low cruise of the permagnetic synchronous motor based on position Sensorless Control, but the method requires motor to have obvious salient pole, therefore, appropriate design internal permanent magnet synchronous motor is conducive to realize electric machine without position sensor zero low cruise, thereby is more conducive to further improve the fault freedom of drive motors.Based on above-mentioned background, develop the self-monitoring composite excitation fault-tolerant motor of a kind of position-based drive system, will contribute to 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 the self-monitoring composite excitation fault-tolerant motor of position-based system, realizes electric machine without position sensor and controls zero low cruise, further improves reliability and the fault freedom of motor driven systems.
technical scheme:for achieving the above object, the technical solution used in the present invention is:
The self-monitoring composite excitation fault-tolerant motor of a position-based system, comprises 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 the circumferential interval of stator inner ring, and the facewidth of armature tooth and the facewidth of fault-tolerant teeth unequal; On armature tooth, be wound with armature coil, for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth, and the armature coil on two radially relative armature tooths is connected into a phase; Magnet exciting coil is sleeved on stator fault-tolerant teeth, and magnet exciting coil is composed in series a set of single-phase central excitation winding successively from beginning to end; Rotor is embedded in permanent magnet; All permanent magnets form permanent magnetic field, and all magnet exciting coils form electricity excitation magnetic field; It is characterized in that: described permanent magnet is put together in the one end near described rotor axis by two magnetic stripes along rotor radial symmetry; In described rotor, between a pair of permanent-magnet pole, along q axle magnetic circuit direction, open one or more notches, form one or more every magnetosphere.
Total number of teeth of armature tooth and fault-tolerant teeth is the multiple of 2m, and the difference of total number of teeth of armature tooth and fault-tolerant teeth and the number of pole-pairs of permanent magnet is ± 2, the number of phases that wherein m is motor.
Described stator and rotor core are silicon steel sheet, iron, cobalt, nickel and alloy thereof.
Described permanent magnet is the permanent magnetic materials such as neodymium iron boron, Rare-Earth Cobalt or aluminium nickel cobalt.
The described non-magnet materials such as aluminium or copper that are provided with in magnetosphere.
Electric system of the present invention, has retained in structure and performance that traditional internal permanent magnet synchronous motor torque output is large, the advantage such as speed-regulating range width, power density and efficiency height; On excitation mode, adopted two kinds of excitation modes of permanent magnet excitation and electric excitation, solve permanent magnet demagnetization and excitation regulation difficult problem; On rotor structure, along q axle magnetic circuit direction, increase one or morely every magnetosphere, be conducive to further improve reliability and the fault-tolerant ability of motor driven systems.
beneficial effect:
Compared with prior art, the present invention has following beneficial effect:
(1) permanent magnet in rotor is the setting of " V " type, and the existing radial magnetizing of permanent magnet, has again cutting orientation magnetizing, and active set has suffered magnetic flux, improves exerting oneself of motor, has the advantages such as speed-regulating range width, power density and efficiency height simultaneously;
(2) in rotor, along q axle magnetic circuit direction, increase one or more every magnetosphere, to increase along the axial effective air gap of q, reduce q axle inductance, increase the poor of d axle inductance and q axle inductance, be conducive to solve the zero low cruise problem in position Sensorless Control, further improve reliability and the fault-tolerant ability of motor driven systems, also helped the torque output of further raising motor simultaneously
(3) adopt redundant electric excitation, when demagnetization or loss of excitation fault occur permanent magnet, the excitation field that can produce by electric excitation winding, maintains motor rotation, has improved the fault-tolerant ability of motor;
(4) armature winding on stator is centralized winding, end is short, is convenient to install, and there is no the fault-tolerant teeth of winding as flux circuit, realize the isolation in motor circuit, magnetic circuit and temperature field between phase and phase simultaneously, improved reliability and the fault-tolerant operation ability of motor;
(5) from the angle of design of electrical motor, consider the failure tolerant of electric motor and controller system, comprise mechanical pick-up device fault in the demagnetization of motor or loss of excitation fault, phase fault or open fault, phase winding fault and electric machine control system, realize 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 are every magnetosphere.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Be illustrated in figure 1 the self-monitoring composite excitation fault-tolerant motor of a kind of position-based, be specially a three-phase 12 groove/10 utmost point motors, comprise 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 the stator 1 circumferential interval of inner ring, and total number of teeth is the multiple (number of phases that m is 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, permanent magnet 3 is put together in the one end near rotor axis by two magnetic stripes along rotor radial symmetry, shape is " V " type, the existing radial magnetizing of permanent magnet like this, there is again cutting orientation magnetizing, active set has suffered magnetic flux, improves the torsion of motor, and can effectively widen the velocity interval of motor.The difference of total number of teeth of armature tooth 4 and fault-tolerant teeth 5 and the number of pole-pairs of permanent magnet 3 is ± 2.
On armature tooth 4, be wound with armature coil 6, for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth 5, when being provided, plays flux circuit the effect of alternate magnetic isolation, physical isolation, heat isolation and electrical isolation, there is higher reliability and the ability that operates with failure, reduced torque pulsation.In addition, armature coil 601 and armature coil 604 series connection are as A phase winding, and armature coil 602 and armature coil 605 series connection are as B phase winding, and armature coil 603 and armature coil 606 series connection, as C phase winding, make the present invention fundamentally avoid phase fault.
Magnet exciting coil 7 is sleeved on fault-tolerant teeth 5, have 6, comprise 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 are 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 field that can produce by electric excitation winding 7, maintains motor rotation, has improved the fault-tolerant ability of motor.
Between the interior a pair of permanent-magnet pole of rotor 2, along q axle magnetic circuit direction, open one or more notches, form one or more every magnetosphere 8, to increase along the axial effective air gap of q, reduce q axle inductance, increase the poor of d axle inductance and q axle inductance, be conducive to solve the zero low cruise problem in position Sensorless Control, further improved reliability and the fault-tolerant ability of motor driven systems, also help the torque output of further raising motor simultaneously.
Operation principle of the present invention is as follows: this motor produces main field jointly by permanent magnet excitation and two kinds of excitation sources of electric excitation, and in these two kinds of magnetic potential sources, permanent magnet sources is main magnetic potential source, and electric excitation magnetic potential is as auxiliary magnetic potential source.When motor is normally worked, electric excitation magnetic potential mainly rises to be increased or weakens main magnetic circuit flux interaction, realizes motor gas-gap magnetic field adjustable; Because the difference of d axle inductance and q axle inductance is larger, can further improve the torque output of motor, meanwhile, motor driven systems adopts position Sensorless Control, has avoided mechanical pick-up device fault in drive system, has improved the reliability of drive system; When motor generation permanent magnet demagnetization fault, the maximum exciting current that the single-phase electricity excitation winding of motor passes into permission produces excitation field, with armature winding reciprocation, produces enough torques, safeguards system service requirement.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the self-monitoring composite excitation fault-tolerant motor of a position-based system, comprises 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 uniformly distributed along the circumferential interval of stator inner ring, and the facewidth of the facewidth of armature tooth (4) and fault-tolerant teeth (5) is unequal; On armature tooth (4), be wound with armature coil (6), for individual layer is concentrated winding, two adjacent individual layers are concentrated between winding and are isolated by fault-tolerant teeth (5), and the armature coil (6) on radially relative two armature tooths (4) is connected into a phase; It is upper that magnet exciting coil (7) is sleeved on stator fault-tolerant teeth (5), and magnet exciting coil (7) is composed in series a set of single-phase central excitation winding successively from beginning to end; Rotor (2) is embedded in permanent magnet (3); All permanent magnets (3) form permanent magnetic field, and all magnet exciting coils (7) form electricity excitation magnetic field; It is characterized in that: described permanent magnet (3) is put together in the one end near described rotor axis by two magnetic stripes along rotor radial symmetry; In described rotor (2), between a pair of permanent-magnet pole, along q axle magnetic circuit direction, open one or more notches, form one or more every magnetosphere (8).
2. the self-monitoring composite excitation fault-tolerant motor of a kind of position-based according to claim 1 system, it is characterized in that: total number of teeth of armature tooth (4) and fault-tolerant teeth (5) is the multiple of 2m, and the difference of the number of pole-pairs of total number of teeth of armature tooth (4) and fault-tolerant teeth (5) and permanent magnet (3) is ± 2, the number of phases that wherein m is motor.
3. the self-monitoring composite excitation fault-tolerant motor of a kind of position-based according to claim 1 system, is characterized in that: described stator (1) and rotor (2) are unshakable in one's determination is silicon steel sheet, iron, cobalt, nickel and alloy thereof.
4. the self-monitoring composite excitation fault-tolerant motor of a kind of position-based according to claim 1 system, is characterized in that: described permanent magnet (3) is neodymium iron boron, Rare-Earth Cobalt or aluminium nickel cobalt.
5. the self-monitoring composite excitation fault-tolerant motor of a kind of position-based according to claim 1 system, is characterized in that: describedly in magnetosphere (8), be provided with aluminium or copper.
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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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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391265A (en) * | 2015-12-21 | 2016-03-09 | 东南大学 | Hybrid excitation fault-tolerant motor system based on brushless harmonic excitation |
| CN105846627A (en) * | 2016-03-24 | 2016-08-10 | 东南大学 | Rotor structure for improving permanent magnet motor power and torque density |
| CN106026597A (en) * | 2016-07-11 | 2016-10-12 | 江苏大学 | Built-in magnetic barrier type magnetic field enhanced permanent magnet 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 |
| CN109365535A (en) * | 2018-11-20 | 2019-02-22 | 湖北新冶钢特种钢管有限公司 | A kind of push-bench rack gear electrical control protection circuit and its guard method |
| CN109831082A (en) * | 2019-03-05 | 2019-05-31 | 南京航空航天大学 | Interior permanent magnet mixed excitation electric machine based on brushless ac excitation |
| CN109962551A (en) * | 2019-02-19 | 2019-07-02 | 华中科技大学 | A kind of double winding fault tolerant permanent magnet machine |
| CN110739822A (en) * | 2019-11-08 | 2020-01-31 | 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 |
| CN112564443A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| CN112600377A (en) * | 2019-10-02 | 2021-04-02 | 丰田自动车株式会社 | Rotating electrical machine and method for controlling rotating electrical machine |
| CN113777530A (en) * | 2021-09-10 | 2021-12-10 | 华北电力大学（保定） | Open-circuit fault diagnosis method for rotating diode of inner rotor type three-phase brushless exciter |
| CN116207892A (en) * | 2023-05-04 | 2023-06-02 | 成都理工大学 | Mixed excitation motor |
| WO2024050897A1 (en) * | 2022-09-05 | 2024-03-14 | 江苏大学 | Permanent magnet fault-tolerant hub electric motor based on active position-sensorless policy, and driving and design methods therefor |
| US12100999B2 (en) | 2022-09-05 | 2024-09-24 | Jiangsu University | Permanent-magnet fault-tolerant in-wheel motor based on active sensorless strategy and drive and design methods thereof |
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| 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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| 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 |
| JP2012075278A (en) * | 2010-09-29 | 2012-04-12 | Aisin Aw Co Ltd | Rotor of rotary electric machine |
| CN202210713U (en) * | 2011-08-26 | 2012-05-02 | 东南大学 | High reliability magnetic flux switching type motor |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391265A (en) * | 2015-12-21 | 2016-03-09 | 东南大学 | Hybrid excitation fault-tolerant motor system based on brushless harmonic excitation |
| CN105846627A (en) * | 2016-03-24 | 2016-08-10 | 东南大学 | Rotor structure for improving permanent magnet motor power and torque density |
| CN106026597A (en) * | 2016-07-11 | 2016-10-12 | 江苏大学 | Built-in magnetic barrier type magnetic field enhanced permanent magnet brushless motor |
| 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 |
| CN109365535A (en) * | 2018-11-20 | 2019-02-22 | 湖北新冶钢特种钢管有限公司 | A kind of push-bench rack gear electrical control protection circuit and its guard method |
| CN109365535B (en) * | 2018-11-20 | 2024-06-04 | 大冶特殊钢有限公司 | Electrical control protection circuit and protection method for rack of push bench |
| CN109962551A (en) * | 2019-02-19 | 2019-07-02 | 华中科技大学 | A kind of double winding fault tolerant permanent magnet machine |
| CN109831082A (en) * | 2019-03-05 | 2019-05-31 | 南京航空航天大学 | Interior permanent magnet mixed excitation electric machine based on brushless ac excitation |
| CN112600377A (en) * | 2019-10-02 | 2021-04-02 | 丰田自动车株式会社 | Rotating electrical machine and method for controlling rotating electrical machine |
| CN112600377B (en) * | 2019-10-02 | 2024-01-16 | 丰田自动车株式会社 | Rotary electric machine and control method for rotary electric machine |
| CN110739822A (en) * | 2019-11-08 | 2020-01-31 | 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 |
| CN112564443A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | Mixed excitation axial magnetic field permanent magnet synchronous motor structure |
| 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 |
| CN113777530A (en) * | 2021-09-10 | 2021-12-10 | 华北电力大学（保定） | Open-circuit fault diagnosis method for rotating diode of inner rotor type three-phase brushless exciter |
| WO2024050897A1 (en) * | 2022-09-05 | 2024-03-14 | 江苏大学 | Permanent magnet fault-tolerant hub electric motor based on active position-sensorless policy, and driving and design methods therefor |
| US12100999B2 (en) | 2022-09-05 | 2024-09-24 | Jiangsu University | Permanent-magnet fault-tolerant in-wheel motor based on active sensorless strategy and drive and design methods thereof |
| CN116207892A (en) * | 2023-05-04 | 2023-06-02 | 成都理工大学 | Mixed excitation motor |
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