CN109842257A - Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine - Google Patents

Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine Download PDF

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CN109842257A
CN109842257A CN201910159466.9A CN201910159466A CN109842257A CN 109842257 A CN109842257 A CN 109842257A CN 201910159466 A CN201910159466 A CN 201910159466A CN 109842257 A CN109842257 A CN 109842257A
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permanent magnet
magnetic
rotor
permanent
iron core
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CN109842257B (en
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隋义
尹佐生
郑萍
王明峤
刘法亮
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine, belongs to fault tolerant permanent magnet machine field, and the present invention is to solve the problems, such as that normal operation performance is mutually restricted with fault-tolerant ability in conventional multiphase fault tolerant permanent magnet machine.Rotor of the present invention include two can adjustable magnetic permanent magnet unit and can not adjustable magnetic permanent magnet unit, three is disposed in parallel in shaft, and structure it is identical two can adjustable magnetic permanent magnet unit be separately fixed at can not be on the left and right sides end face of adjustable magnetic permanent magnet unit, two can adjustable magnetic permanent magnet unit be staggeredly equipped with p permanent magnetism magnetic pole and p ferromagnetic magnetic poles along excircle, and two can the magnetic pole of adjustable magnetic permanent magnet unit be circumferentially staggered 180/p degree;Motor d-axis reactance is greater than quadrature axis reactance;By adjusting the electric current in stator winding come change two can adjustable magnetic permanent magnet unit permanent magnet operating point, to change magnetic flux size or direction, so realize two can adjustable magnetic permanent magnet unit permanent magnetic field of the non-adjustable magnetic cell in air gap L is superimposed forward or backwards.

Description

Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine
Technical field
The invention belongs to fault tolerant permanent magnet machine fields.
Background technique
Magneto is obtained with the advantage of its high efficiency and high power density in many fields such as electric car, wind-power electricity generation It is widely applied.Compared with traditional three-phase permanent magnet synchronous motor, multiphase permanent magnet fault-tolerant electric machine has due to its number of phases redundancy the characteristics of There is good fault-tolerant operation ability.Unlike conventional permanent magnet motor, when designing multiphase permanent magnet fault-tolerant electric machine, it need to guarantee it Meet electricity, magnetic, heat and physical isolation condition between different phase windings, it only in this way just can in the event of a failure, by failure Winding is effectively isolated with other normal phase windings.Simultaneously by controlling the electric current of other normal phase windings, to guarantee multiphase Fault tolerant permanent magnet machine nonserviceable under fault-tolerant operation.For multiphase permanent magnet fault-tolerant electric machine, winding short circuit failure is danger The fault type of evil most serious.In order to inhibit winding short circuit electric current, narrow and deep groove profile is commonly designed to increase slot leakage inductance, but this The runnability of multiphase permanent magnet fault-tolerant electric machine can be seriously affected, for example will lead to motor power factor and overload capacity to reduce Deng.How to solve the problems, such as that normal operation performance is mutually restricted with fault-tolerant ability in multiphase permanent magnet fault-tolerant electric machine, forever for multiphase The extensive use of magnetic fault-tolerant motor is most important.
Summary of the invention
It is mutual the invention aims to solve normal operation performance and fault-tolerant ability in conventional multiphase fault tolerant permanent magnet machine The problem of restriction, provides a kind of anti-salient pole type axial direction parallel type multi-phase permanent appearance for having both excellent runnability and fault-tolerant ability Wrong motor.
Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine of the invention includes shaft 1, rotor 4, casing 5 and stator 6, stator 6 is fixed on the inner sidewall of casing 5, and rotor 4 is fixed in shaft 1, there is radial air gap L between rotor 4 and stator 6; Polyphase windings are arranged in stator 6;
Rotor 4 include first can adjustable magnetic permanent magnet unit, second can adjustable magnetic permanent magnet unit and can not adjustable magnetic permanent magnet unit, three Be disposed in parallel in shaft 1, and structure identical first can adjustable magnetic permanent magnet unit, second can adjustable magnetic permanent magnet unit be separately fixed at Can not on the left and right sides end face of adjustable magnetic permanent magnet unit, first can adjustable magnetic permanent magnet unit, second can adjustable magnetic permanent magnet unit along outer Circumference is staggeredly equipped with p permanent magnetism magnetic pole and p ferromagnetic magnetic poles, and two can the magnetic pole of adjustable magnetic permanent magnet unit be circumferentially staggered 180/p degree;Motor d-axis reactance is greater than quadrature axis reactance;
Can not the magnetizing direction of permanent magnet in adjustable magnetic permanent magnet unit be axial;Two can permanent magnetism in adjustable magnetic permanent magnet unit The magnetizing direction of body is parallel magnetization, and the magnetizing direction at each permanent magnet midpoint is radial, and two can be in adjustable magnetic permanent magnet unit Permanent magnet magnetizing direction it is opposite;
By adjusting the electric current in 6 winding of stator come change two can adjustable magnetic permanent magnet unit permanent magnet operating point, with Change magnetic flux size or direction, and then realization two can permanent-magnet magnetic of the adjustable magnetic permanent magnet unit to non-adjustable magnetic cell in air gap L Field is superimposed forward or backwards.
Preferably, stator 6 includes stator core 6-2 and m phase stator winding 6-1, and stator winding 6-1 is multiphase fractional-slot collection Middle winding meets electricity, magnetic, heat between different phase windings and is physically isolated condition, and stator winding 6-1 is connected with the symmetrical alternating current of m, M is the integer greater than 3.
Preferably, can not adjustable magnetic permanent magnet unit include annular permanent magnet 4-4 and rotor framework 4-5, annular permanent magnet 4-4 is solid It is scheduled in shaft 1, rotor framework 4-5 is fixed on the outer round surface of annular permanent magnet 4-4.
Preferably, first can adjustable magnetic permanent magnet unit include the first rotor iron core 4-2, third trochanter iron core 4-3 and p first Permanent magnet 4-1, second can adjustable magnetic permanent magnet unit include 4-6 and p the second rotor core 4-7, fourth trochanter iron core the second permanent magnetism Body 4-8;The outer surface of the first rotor iron core 4-2 and the second rotor core 4-7 are uniformly provided with 2p completely the same the first rotors Groove 4-2-1 and the second rotor recesses 4-7-1 forms p first to be interspersed in the outer surface of the first rotor iron core 4-2 4-2-2 and p the first permanent magnetism magnetic pole 4-2-3 of magnetic pole iron, form the p being interspersed in the outer surface of the second rotor core 4-7 A second magnetic pole iron 4-7-2 and p the second permanent magnetism magnetic pole 4-7-3, in the first permanent magnetism magnetic pole 4-2-3 and the second permanent magnetism magnetic pole 4-7- 4-2-4 and p the second permanent magnetism magnetic pole slot 4-7-4 of completely the same p the first permanent magnetism magnetic pole slot are had on 3;P first forever 4-1 and p the second permanent magnet 4-8 of magnet are respectively embedded in the first permanent magnetism magnetic pole slot 4-2-4 and the second permanent magnetism magnetic pole slot 4-7-4 In;Third trochanter iron core 4-3 is fixed in shaft 1, and the first rotor iron core 4-2 is fixed on third trochanter iron core 4-3 outer round surface On;Fourth trochanter iron core 4-6 is fixed in shaft 1, and the second rotor core 4-7 is fixed on the outer circle table of fourth trochanter iron core 4-6 On face;On the axis direction of shaft 1, the first rotor iron core 4-2 and the second rotor core 4-7 are circumferentially staggered 180/p degree.
Preferably, the first permanent magnetism magnetic pole slot 4-2-4 and the second permanent magnetism magnetic pole slot 4-7-4 is tangential slot.
Preferably, 4-1 and p the second permanent magnet 4-8 of p the first permanent magnet are the adjustable low-coercivity permanent magnetism of magnetized state Body, annular permanent magnet 4-4 are the nonadjustable High-coercivity Permanent Magnets of magnetized state, the first permanent magnet 4-1 and the second permanent magnet 4-8 For the strip permanent magnet of parallel magnetization, the magnetizing direction of the center of the strip permanent magnet is radial, p the first permanent magnets The magnetizing direction of 4-1 is identical, and the magnetizing direction of p the second permanent magnet 4-8 is identical, the first permanent magnet 4-1 and the second permanent magnet 4-8 Magnetizing direction on the contrary, annular permanent magnet 4-4 be axial charging.
Preferably, shaft 1 and rotor framework 4-5 use non-magnet material.
Preferably, the first rotor iron core 4-2, third trochanter iron core 4-3, fourth trochanter iron core 4-6 and the second rotor core 4-7 uses silicon steel material, and third trochanter iron core 4-3 and fourth trochanter iron core 4-6 are wound along the circumferencial direction of shaft 1, The first rotor iron core 4-2 and the second rotor core 4-7 are overrided to form along the axial direction of shaft 1.
Preferably, the motor is powered using multiphase full-bridge inverter.
Preferably, when short circuit occurs for any phase winding in the m phase winding of stator 6, by adjusting the electric current of stator winding 6-1 Reduce the operating point of the first permanent magnet 4-1 and the second permanent magnet 4-8, to reduce the amplitude of magnetic field Downward addition, come reduce around Group short circuit current;
Or change the first permanent magnet 4-1 and the second permanent magnet 4-8 magnetizing direction, by magnetic field negative sense be superimposed reduce around Group short circuit current.
Beneficial effects of the present invention: the present invention discloses a kind of anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine, with Traditional multiphase permanent magnet fault-tolerant electric machine is compared, and anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine of the invention has both excellent Normal operation performance and fault-tolerant operation ability, be in particular in: under normal operating conditions can be by adjusting the first permanent magnet With the operating point of the second permanent magnet, meets and change air gap flux density, increase output torque, improve efficiency distribution characteristic, increase weak magnetic The difference operating condition such as expansion speed range needs;Under short circuit fault condition, pass through the first permanent magnet of adjustable magnetic current control and the second permanent magnetism The magnetic state of body makes the reduction of its operating point or flux-reversal, reduces permanent magnet flux, solve the problems, such as that winding short circuit electric current is excessive. In addition, unlike conventional internal formula permanent magnet synchronous motor, anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant of the invention The d-axis reactance of motor is greater than quadrature axis reactance, can obtain positive reluctance torque by applying positive direct-axis current, be conducive to overcome Conventional permanent magnet motor operates in permanent magnet demagnetization risk when weak magnetism speed expansion area.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is the B-B cross-sectional view of Fig. 1;
Fig. 4 is the C-C cross-sectional view of Fig. 1.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate As long as not constituting conflict, each feature in each embodiment and each embodiment in the present invention can be combined with each other, It is within the scope of the present invention to be formed by technical solution.
It can meet by adjusting the operating point of the first permanent magnet and the second permanent magnet under normal operating conditions and change air gap The different operating conditions such as flux density, increase output torque, improvement efficiency distribution characteristic, increase weak magnetism speed expansion range need;In short trouble In the case of, by the magnetic state of adjustable magnetic current control the first permanent magnet and the second permanent magnet, keep the reduction of its operating point or magnetic flux anti- To reduction permanent magnet flux solves the problems, such as that winding short circuit electric current is excessive.
Specific embodiment 1: illustrating that present embodiment, present embodiment include shaft 1, below with reference to Fig. 1 to Fig. 4 One bearing 2, left end cap 3, rotor 4, casing 5, stator 6, right end cap 7 and second bearing 8,
Stator 6 is fixed on the inner sidewall of casing 5, and rotor 4 is fixed in shaft 1, and shaft 1 passes through first bearing 2 and the Two bearings 8 rotate be fixed on left end cap 3 and right end cap 7 respectively, and left end cap 3 and right end cap 7 are separately fixed at the left and right of casing 5 Two-port has radial air gap L between rotor 4 and stator 6;
Stator 6 is made of stator core 6-2 and m phase stator winding 6-1, stator winding 6-1 be multiphase fractional-slot concentrate around Group meets electricity, magnetic, heat between different phase windings and is physically isolated condition, and stator winding 6-1 is connected with the symmetrical alternating current of m, and m is Integer greater than 3;
Rotor 4 is by p the first permanent magnet 4-1, the first rotor iron core 4-2, the second rotor core 4-7, third trochanter iron core 4-5, p 4-3, fourth trochanter iron core 4-6, annular permanent magnet 4-4, rotor framework the second permanent magnet 4-8 compositions;The first rotor iron The outer surface of heart 4-2 and the second rotor core 4-7 are uniformly provided with 2p completely the same the first rotor groove 4-2-1 and second turn Sub- groove 4-7-1 forms 4-2-2 and p the first permanent-magnet magnetics of p the first magnetic pole iron in the outer surface of the first rotor iron core 4-2 Pole 4-2-3 forms 4-7-2 and p the second permanent magnetism magnetic pole 4- of p the second magnetic pole iron in the outer surface of the second rotor core 4-7 7-3 has completely the same p the first permanent magnetism magnetic poles on the first permanent magnetism magnetic pole 4-2-3 and the second permanent magnetism magnetic pole 4-7-3 4-2-4 and p the second permanent magnetism magnetic pole slot 4-7-4 of slot;4-1 and p the second permanent magnet 4-8 of p the first permanent magnet are respectively embedded in In first permanent magnetism magnetic pole slot 4-2-4 and the second permanent magnetism magnetic pole slot 4-7-4;Third trochanter iron core 4-3 is fixed in shaft 1, and first Rotor core 4-2 is fixed on third trochanter iron core 4-3;Annular permanent magnet 4-4 is fixed in shaft 1, and rotor framework 4-5 is fixed On the outer round surface of annular permanent magnet 4-4;Fourth trochanter iron core 4-6 is fixed in shaft 1, and the second rotor core 4-7 is fixed On the outer surface of fourth trochanter iron core 4-6;On the axis direction of shaft 1, annular permanent magnet 4-4 and rotor framework 4-5's Side is the first permanent magnet 4-1, the first rotor iron core 4-2, third trochanter iron core 4-3, and the other side is the second permanent magnet 4-8, Two rotor core 4-7 and fourth trochanter iron core 4-6;The first rotor iron core 4-2 and the second rotor core 4-7 are circumferentially staggered 180/p degree;
4-1 and p the second permanent magnet 4-8 of p the first permanent magnet are the adjustable low-coercivity permanent magnet of magnetized state, annular Permanent magnet 4-4 is the nonadjustable High-coercivity Permanent Magnets of magnetized state, and the first permanent magnet 4-1 and the second permanent magnet 4-8 are parallel It magnetizes, midpoint is radial magnetizing, and the magnetizing direction of p the first permanent magnet 4-1 is identical, and a second permanent magnet 4-8's of p magnetizes Direction is identical, and the magnetizing direction of the first permanent magnet 4-1 and the second permanent magnet 4-8 are on the contrary, annular permanent magnet 4-4 is axial charging;
P the first permanent magnet 4-1, the first rotor iron core 4-2, third trochanter iron core 4-3 respectively with p the second permanent magnet 4- 8, the second rotor core 4-7, the outer dimension of fourth trochanter iron core 4-6 are completely the same, third trochanter iron core 4-3 and fourth trochanter Iron core 4-6 is cylinder, and the radial direction length of annular permanent magnet 4-4 is d, third trochanter iron core 4-3 and fourth trochanter iron core Radial direction the length d1, the first rotor iron core 4-2 of 4-6 and the minimum thickness in the second rotor core 4-7 yoke portion are d2, and are met d1<d<d1+d2。
Shaft 1 and rotor framework 4-5 use non-magnet material, the first rotor iron core 4-2, third trochanter iron core 4-3, the 4th Rotor core 4-6 and the second rotor core 4-7 uses silicon steel material, third trochanter iron core 4-3 and the edge fourth trochanter iron core 4-6 The circumferencial direction of shaft 1 is wound, and the first rotor iron core 4-2 and the second rotor core 4-7 are laminated along the axial direction of shaft 1 It forms.
Anti- salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine is powered using multiphase full-bridge inverter.
In order to illustrate the working principle of the invention, present embodiment is illustrated by taking Fig. 1 to Fig. 4 structure as an example.
According to the characteristic of permanent magnet coercive force, the permanent magnet in present embodiment can be divided into two major classes, be high respectively Coercivity permanent magnet and low-coercivity permanent magnet.Wherein, annular permanent magnet 4-4 belongs to High-coercivity Permanent Magnets, and magnetic state is not It is adjustable;4-1 and p the second permanent magnet 4-8 of the first permanent magnet of p belong to low-coercivity permanent magnet, magnetic state can by Apply adjustable magnetic electric current in stator winding 6-1 to be controlled, in Fig. 1~4, the magnetizing direction at p the first midpoints permanent magnet 4-1 is Radially outward, the magnetizing direction at p the second midpoints permanent magnet 4-8 is that radially-inwardly, annular permanent magnet 4-4 is axial to the right.At this In embodiment, annular permanent magnet 4-1 and p the second permanent magnet 4-8 collective effects of 4-4, p the first permanent magnets simultaneously produce respectively The magnetisation line of force.
The magnetic line of force path that annular permanent magnet 4-4 is generated when acting on are as follows: right end face of the magnetic line of force from annular permanent magnet 4-4 It sets out, successively passes through gas after p the second magnetic pole iron 4-7-2 by way of fourth trochanter iron core 4-6 and the second rotor core 4-7 Gap L enters the teeth portion of stator core 6-2 right half part, the yoke portion of stator core 6-2 is then imported, then in stator core 6-2 Yoke portion in axial direction flow to the yoke portion of stator core 6-2 left-half, teeth portion, enter p the first magnetic pole irons across air gap L In 4-2-2, then by the first rotor iron core 4-2 and third trochanter iron core 4-3, reach the left end face of annular permanent magnet 4-4, In the closed path that this forms the magnetic line of force.
The magnetic line of force path that first permanent magnet 4-1 is generated when acting on are as follows: the magnetic line of force is from the first permanent magnet 4-1 close to air gap L Outer surface set out, the left side stator core 6-2 is then passed through on surface and air gap L across p the first permanent magnetism magnetic pole 4-2-3 Point teeth portion, yoke portion, teeth portion, then pass through air gap L, reach the first magnetic pole iron 4-2-2, then pass through the first rotor iron core 4-2, The first permanent magnet 4-1 is returned to close to the inner surface of the first permanent magnetism magnetic pole slot 4-2-4, to form the closed path of the magnetic line of force.
The magnetic line of force path that second permanent magnet 4-8 is generated when acting on are as follows: the magnetic line of force is from the second permanent magnet 4-8 far from air gap L A side surface set out, by the second rotor core 4-7, reach the second magnetic pole iron 4-7-2, pass through air gap L, successively pass through stator The teeth portion of iron core 6-2 right half part, yoke portion, teeth portion then pass through air gap L and the second permanent magnetism magnetic pole 4-7-3 close to the outer of air gap L Surface reaches the second permanent magnet 4-8 close to the outer surface of air gap L, to form the closed path of the magnetic line of force.
According to the path of the above-mentioned magnetic line of force it is found that the magnetic line of force that annular permanent magnet 4-4 is generated in present embodiment is in radial direction The left and right side part of air gap L forms with the first permanent magnet 4-1 and the second permanent magnet 4-8 magnetic line of force generated positive folded respectively Add, that is to say, that 4-1 and p the second permanent magnet 4-8 of 4-4, p the first permanent magnets of annular permanent magnet are to permanent magnetic field in air gap Generation form Downward addition effect, and the number of pole-pairs of permanent magnetic field is p.
If in the magnetizing direction and figure of 4-1 and p the second permanent magnet 4-8 of the first permanent magnet of p on the contrary, if in air gap magnetic Field forms reversed synergistic effect.
Under motor normal operation, the symmetrical alternating current of m is connected in m phase stator winding 6-1, the rotary magnetic of generation is dynamic Gesture acts on and forms armature field on air gap, and the ingredient and permanent magnetic field that number of pole-pairs is p in armature field interact, and then produce Raw torque.
The electric current in m phase stator winding 6-1 is controlled by multiphase full-bridge inverter, to p the first permanent magnet 4-1 and p The magnetic state of a second permanent magnet 4-8 is controlled, and then influences the size of resultant magnetic field in air gap, and it is axial to improve anti-salient pole type The working characteristics of parallel type multiphase permanent magnet fault-tolerant electric machine under normal operating conditions, the characteristic include changing air gap flux density, increasing Big output torque, improvement efficiency distribution characteristic, increase weak magnetism speed expansion range etc..
Specific embodiment 2: present embodiment and embodiment one the difference is that, in m phase stator winding 6-1 A certain phase winding short trouble has occurred, pass through multiphase full-bridge inverter for the short circuit of the end of the failure phase winding, same to time control Electric current in stator winding 6-1 processed in the normal winding of remaining m-1 phase, to 4-1 and p the second permanent magnetism of p the first permanent magnet The magnetic state of body 4-8 is controlled, and reduces the operating point of p first 4-1 and p the second permanent magnet 4-8 of permanent magnet, or even make It reversely magnetizes, and reduces the size of permanent magnetic field in air gap, and then inhibit the short circuit current of failure phase winding.
Embodiment:
By taking five-phase induction motor as an example, in normal operating condition, using direct-axis current idWhen=0 control, the stator of stator 6 around It is I that group A, B, C, D, E phase, which passes to amplitude,m, angular frequency ω, initial phase angle beFive symmetrical sinusoidal current iA, iB, iC, iD, iE, i.e.,
Assuming that short trouble occurs for A phase winding, controls remaining four mutually normal windings and passes to following electric current:
Wherein intermediate variable
In formula:R0For short-circuit phase winding resistance;L0For short-circuit phase winding inductance;N is machine winding The number of turns;kdpFor machine winding factor;Φpm-DFor the permanent magnet flux coupled with short-circuit phase winding;K is current coefficient.
When short trouble occurs for A phase, using five phase full-bridge inverters by A phase winding end short circuit, while to remaining B, C, D, E phase winding are powered according to above-mentioned current forms, can to two can in adjustable magnetic permanent magnet unit permanent magnet magnetic state It is controlled, reduce the two can the operating point of permanent magnet in adjustable magnetic permanent magnet unit, or even reversely magnetize, to reach reduction The size of permanent magnetic field in air gap, and then inhibit the purpose of the short circuit current of failure phase winding.
Specific embodiment 3: present embodiment and embodiment one the difference is that, in m phase stator winding 6-1 Certain n phase winding short trouble, and m-n >=3 have occurred, it is by multiphase full-bridge inverter that the end of n failure phase winding is short Road, while the electric current in the normal winding of remaining m-n phase in stator winding 6-1 is controlled, to p the first permanent magnet 4-1 and p The magnetic state of second permanent magnet 4-8 is controlled, and the operating point drop of p first 4-1 and p the second permanent magnet 4-8 of permanent magnet is made It is low, or even it is made reversely to magnetize, reduce the size of permanent magnetic field in air gap, and then inhibit the short circuit current of failure phase winding.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details, But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.

Claims (10)

1. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine, including shaft (1), rotor (4), casing (5) and stator (6), stator (6) is fixed on the inner sidewall of casing (5), and rotor (4) is fixed on shaft (1), rotor (4) and stator (6) it Between have radial air gap L;Polyphase windings are arranged in stator (6);
It is characterized in that, rotor (4) include first can adjustable magnetic permanent magnet unit, second can adjustable magnetic permanent magnet unit and can not adjustable magnetic permanent magnetism Unit, three are disposed in parallel on shaft (1), and structure identical first can adjustable magnetic permanent magnet unit, second can adjustable magnetic permanent magnetism list Member be separately fixed at can not on the left and right sides end face of adjustable magnetic permanent magnet unit, first can adjustable magnetic permanent magnet unit, second can adjustable magnetic forever Magnetic cell is staggeredly equipped with p permanent magnetism magnetic pole and p ferromagnetic magnetic poles along excircle, and two can adjustable magnetic permanent magnet unit permanent magnetism Magnetic pole is circumferentially staggered 180/p degree;Motor d-axis reactance is greater than quadrature axis reactance;
Can not the magnetizing direction of permanent magnet in adjustable magnetic permanent magnet unit be axial;Two can permanent magnet in adjustable magnetic permanent magnet unit Magnetizing direction is parallel magnetization, and the magnetizing direction at each permanent magnet midpoint is radial, and two can be in adjustable magnetic permanent magnet unit forever The magnetizing direction of magnet is opposite;
By adjusting the electric current in stator (6) winding come change two can adjustable magnetic permanent magnet unit permanent magnet operating point, to change Become magnetic flux size or direction, and then realization two can permanent magnetic field of the adjustable magnetic permanent magnet unit to non-adjustable magnetic cell in air gap L It is superimposed forward or backwards.
2. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 1, which is characterized in that stator (6) Including stator core (6-2) and m phase stator winding (6-1), stator winding (6-1) is multiphase fractional-slot concentratred winding, different phases Meet electricity, magnetic, heat and physical isolation condition between winding, stator winding (6-1) is connected with the symmetrical alternating current of m, and m is greater than 3 Integer.
3. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 1, which is characterized in that can not adjustable magnetic Permanent magnet unit includes annular permanent magnet (4-4) and rotor framework (4-5), and annular permanent magnet (4-4) is fixed on shaft (1), is turned Sub- skeleton (4-5) is fixed on the outer round surface of annular permanent magnet (4-4).
4. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 3, which is characterized in that first is adjustable Magnetic permanent magnet unit includes the first rotor iron core (4-2), third trochanter iron core (4-3) and p the first permanent magnet (4-1), and second can Adjustable magnetic permanent magnet unit includes the second rotor core (4-7), fourth trochanter iron core (4-6) and p the second permanent magnets (4-8);First The outer surface of rotor core (4-2) and the second rotor core (4-7) is uniformly provided with 2p completely the same the first rotor groove (4- 2-1) with the second rotor recesses (4-7-1), p first to be interspersed is formd in the outer surface of the first rotor iron core (4-2) Magnetic pole iron (4-2-2) and p the first permanent magnetism magnetic poles (4-2-3), form in the outer surface of the second rotor core (4-7) and staggeredly divide P the second magnetic pole irons (4-7-2) and p the second permanent magnetism magnetic poles (4-7-3) of cloth, in the first permanent magnetism magnetic pole (4-2-3) and second Completely the same p the first permanent magnetism magnetic pole slots (4-2-4) and p the second permanent magnetism magnetic poles are had on permanent magnetism magnetic pole (4-7-3) Slot (4-7-4);P the first permanent magnets (4-1) and p the second permanent magnets (4-8) are respectively embedded in the first permanent magnetism magnetic pole slot (4-2- 4) and in the second permanent magnetism magnetic pole slot (4-7-4);Third trochanter iron core (4-3) is fixed on shaft (1), the first rotor iron core (4- 2) it is fixed on third trochanter iron core (4-3) outer round surface;Fourth trochanter iron core (4-6) is fixed on shaft (1), the second rotor Iron core (4-7) is fixed on the outer round surface of fourth trochanter iron core (4-6);On the axis direction of shaft (1), the first rotor iron The heart (4-2) and the second rotor core (4-7) are circumferentially staggered 180/p degree.
5. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 4, which is characterized in that the first permanent magnetism Magnetic pole slot (4-2-4) and the second permanent magnetism magnetic pole slot (4-7-4) are tangential slot.
6. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 5, which is characterized in that p first Permanent magnet (4-1) and p the second permanent magnets (4-8) are the adjustable low-coercivity permanent magnet of magnetized state, annular permanent magnet (4-4) For the nonadjustable High-coercivity Permanent Magnets of magnetized state, the first permanent magnet (4-1) and the second permanent magnet (4-8) are parallel magnetization Strip permanent magnet, the magnetizing direction of the center of the strip permanent magnet are radial direction, and p a first permanent magnet (4-1's) magnetizes Direction is identical, and the magnetizing direction of p the second permanent magnets (4-8) is identical, the first permanent magnet (4-1) and the second permanent magnet (4-8) Magnetizing direction is on the contrary, annular permanent magnet (4-4) is axial charging.
7. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 3, which is characterized in that shaft (1) Non-magnet material is used with rotor framework (4-5).
8. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 4, which is characterized in that the first rotor Iron core (4-2), third trochanter iron core (4-3), fourth trochanter iron core (4-6) and the second rotor core (4-7) use silicon steel sheet material Material, third trochanter iron core (4-3) and fourth trochanter iron core (4-6) are wound along the circumferencial direction of shaft (1), the first rotor iron The heart (4-2) and the second rotor core (4-7) are overrided to form along the axial direction of shaft (1).
9. special according to claim 1 to anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine described in 7 any claims Sign is that the motor is powered using multiphase full-bridge inverter.
10. anti-salient pole type axial direction parallel type multiphase permanent magnet fault-tolerant electric machine according to claim 9, which is characterized in that stator (6) M phase winding in any phase winding when short circuit occurs, reduce the first permanent magnet by adjusting the electric current of stator winding (6-1) The operating point of (4-1) and the second permanent magnet (4-8), to reduce the amplitude of magnetic field Downward addition, to reduce winding short circuit electric current;
Or change the first permanent magnet (4-1) and the second permanent magnet (4-8) magnetizing direction, by magnetic field negative sense superposition come reduce around Group short circuit current.
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