CN104467333A - Rotor excitation multi-phase reluctance motor and control method thereof - Google Patents

Rotor excitation multi-phase reluctance motor and control method thereof Download PDF

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Publication number
CN104467333A
CN104467333A CN201410718830.8A CN201410718830A CN104467333A CN 104467333 A CN104467333 A CN 104467333A CN 201410718830 A CN201410718830 A CN 201410718830A CN 104467333 A CN104467333 A CN 104467333A
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rotor
groove
core
permanent magnet
tooth
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CN104467333B (en
Inventor
寇宝泉
贺铁锐
牛旭
谢逸轩
赵晓坤
孙青杰
邵一
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature 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
    • H02K1/14Stator cores with salient poles
    • H02K1/146Stator cores with salient poles consisting of a generally annular yoke 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
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotor
    • H02K1/272Inner rotor where the magnetisation axis of the magnets is radial or tangential
    • H02K1/274Inner rotor where the magnetisation axis of the magnets is radial or tangential consisting of a plurality of circumferentially positioned magnets
    • H02K1/2753Inner rotor where the magnetisation axis of the magnets is radial or tangential consisting of a plurality of circumferentially positioned magnets consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276Magnets embedded in the magnetic core
    • H02K1/2766Magnets embedded in the magnetic core having a flux concentration effect
    • H02K1/2773Magnets embedded in the magnetic core having a flux concentration effect consisting of tangentially magnetized radial magnets
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

The invention relates to a rotor excitation multi-phase reluctance motor and a control method of the rotor excitation multi-phase reluctance motor and relates to the field of motors. The rotor excitation multi-phase reluctance motor and the control method of the rotor excitation multi-phase reluctance motor aim to solve the problems that according to an existing rotor of a permanent magnet synchronous motor, the magnetic field adjustment range is narrow, the structure is complicated, the structural strength is poor, and the existing rotor is not suitable for high-speed operation. An armature core and a rotor core are both cylindrical, the inner side of the armature core is provided with multiple groove-shaped teeth and grooves in the axial direction, the groove-shaped teeth and the grooves are arranged sequentially in the circumferential direction, a coil is wound around each tooth on the armature core, m phases of armature windings are arranged, m is equal to or larger than three, a phase unit is formed every k adjacent teeth and the coils wound around the teeth, k is equal to or larger than two, the winding directions of the coils on every two adjacent teeth are opposite, the coils on every two adjacent teeth are connected in series, m*n phase units are arranged, n is a positive integer, coils of the phase units are connected in series, multiple grooves are evenly formed in the outer surface of the rotor core in the axial direction, a permanent magnet is embedded in each groove, the permanent magnets are magnetized tangentially, and the magnetizing directions of every two adjacent permanent magnets are opposite. The rotor excitation multi-phase reluctance motor and the control method of the rotor excitation multi-phase reluctance motor can be applied to electric vehicle driving systems, electric main shaft systems, the variable-speed power generation field and other fields.

Description

Rotor-exciting polyphase reluctance machine and control method thereof
Technical field
The present invention relates to rotor-exciting polyphase reluctance machine and control method thereof.Belong to machine field.
Background technology
The thought of traditional permanent magnet synchronous motor weak magnetics detect controls to the adjustable magnetic of DC motor with separate excitation.When DC motor with separate excitation terminal voltage reaches capacity voltage, for making electronic function output-constant operation in higher rotating speed, the exciting current of motor should be reduced, to ensure the balance of voltage.The voltage balance equation of permanent magnet synchronous motor is:
u = ω ( ρ L q i q ) 2 + ( L d i d + ψ f ) 2 - - - ( 1 )
The excitation magnetic kinetic potential of permanent magnet synchronous motor be produced by permanent magnet and cannot regulate, can not be controlled by exciting current as separately excited DC machine, work as u=u limtime, want to continue to raise rotating speed and only have by regulating i dand i qrealize, increase motor d-axis demagnetizing current component and reduce quadrature axis current component, with ME for maintenance equilibrium relation, all can obtain " weak magnetic " effect.The former " weak magnetic " ability is directly related with motor d-axis inductance, and the latter is relevant to quadrature axis inductance.Because motor phase current also has certain limit, increase demagnetizing current component and ensure that armature supply is no more than current limit value simultaneously, quadrature axis current just should corresponding reduction.Therefore, be generally realize weak magnetism speed expansion by increasing d-axis demagnetizing current.
When carrying out weak magnetics detect to permanent magnet synchronous motor, if the voltage u that ignores stator resistance and electric moter voltage reaches capacity limtime, the speed formula that can be obtained motor by voltage balance equation (1) is
n = 60 u lim 2 πp ( L q i q ) 2 + ( L d i d + ψ f ) 2 - - - ( 2 )
From formula (2), motor can " weak magnetic " weak magnetic stripe part of ideal of running on infinite high speed be:
ψ f=-L di d=L di lim(3)
i q=0(4)
Be all direct-axis current component when motor terminal voltage and electric current reach maximum, electric current, and when ignoring the affecting of stator resistance, the desirable maximum speed n of motor can be obtained maxfor:
n max = 60 u lim 2 πp | ψ f - L d i lim | - - - ( 5 )
Motor electromagnetic torque T eexpression formula be:
T e=p[ψ fi q+(L d-L q)i di q] (6)
1st permanent-magnet torque being permanent magnet and the effect of q shaft current and producing on torque expression formula (6) the right; 2nd reluctance torque produced for saliency.For permanent magnet synchronous motor, usually due to L d< L q, therefore, by flowing the d shaft current i of negative sense d, make reluctance torque and permanent-magnet torque superimposed, become a part for Driving Torque.The d shaft current i of negative sense dthe d armature axis reaction magnetic flux produced is contrary with the polarity of permanent magnet, if do not noted, just may produce the irreversible degaussing of permanent magnet.
In recent years, along with the raising of permanent magnetic material performance, coercive force is high, demagnetization curve is that linear rare-earth permanent magnet is widely used in machine field, makes the weak magnetics detect of permagnetic synchronous motor become possibility, widen the speed adjustable range of motor, improve the efficiency of governing system.
As can be seen from formula (5), the main method that the maximum speed improving permanent magnet synchronous motor can be taked has:
(1) magnetic linkage ψ is reduced f; (2) i is increased lim; (3) L is increased d; (4) motor limiting voltage u is improved lim; (5) combination of front four kinds of methods is adopted.
If improve the limiting voltage u of motor limwith limiting current i limthen need the capacity increasing inverter, thus improve the manufacturing cost of system, generally inadvisable.When limiting voltage and limiting current one timing of motor, the desirable maximum speed of motor depends primarily on empty load of motor permanent magnet flux linkage and direct-axis synchronous inductance, and has nothing to do with quadrature axis synchronous inductance.
As can be seen from formula (5), ψ fmore the weak-magnetic speed-regulating range of small machine is wider, but ψ fless, as can be seen from formula (6), electromagnetic torque T ewill be less.Therefore unless reluctance torque increases, otherwise the performance that permanent magnet synchronous motor can not have.It is very important for improving convex grey subset to increase torque.Consider L qbeing restricted due to the magnetic saturation of iron core, therefore usually requiring by reducing L dincrease electromagnetic torque.But the rotor structure of traditional embedded permanent magnet permagnetic synchronous motor is as shown in Figure 4, its ψ fgreatly, L dthen less, therefore must by greatly increasing i dmake motor run on wider velocity interval, this will increase the capacity of inverter, reduces the efficiency of drive system, easily makes permanent magnet produce irreversible degaussing.
Summary of the invention
The present invention is that the rotor field adjustable range in order to solve existing permagnetic synchronous motor is narrow, and complex structure, the structural strength of rotor are low, and are not suitable for the problem of high-speed cruising.Rotor-exciting polyphase reluctance machine and control method thereof are now provided.
Rotor-exciting polyphase reluctance machine, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove successively alternately along the circumferential direction, along the circumferential direction, each tooth of armature core are wound with a coil, armature winding is m phase winding, m >=3, every adjacent k tooth and on institute's coiling form a facies unit, k >=2, form the coil in k tooth of a facies unit often on adjacent two teeth around on the contrary, and k coils connected in series is together; Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Rotor-exciting polyphase reluctance machine, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove are successively alternately along the circumferential direction, along the circumferential direction, on a tooth, be wound with a coil at armature core, armature winding is m phase winding, m >=3, namely the tooth being wound with coil and the tooth not having coil are along the circumferential direction alternately arranged, each tooth and on institute's coiling form a facies unit;
Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together; The stator tooth width of coiling is not less than or equal to the stator tooth width being wound with coil,
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Rotor-exciting polyphase reluctance machine, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, opens multiple groove vertically in the inner side of armature core, the tooth of formation and groove successively alternately along the circumferential direction,
Rotor number of poles Z rwith stator tooth number Z sbetween meet following relation: Z s=mqZ r, q is MgO-ZrO_2 brick, q>=1,
In each groove, embed armature winding, armature winding is the symmetrical lap winding of m or wave winding, m >=3;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
The control method of rotor-exciting polyphase reluctance machine, motor adopts vector control, below base speed, direct-axis current i d> 0.
Beneficial effect of the present invention is: the present invention can adjust the ψ of permagnetic synchronous motor flexibly according to the running status of motor f, and make L d> > L qrotor structure, by increase direct-axis current i dmotor is made to run on wider velocity interval; Rotor is made up of rotor core and permanent magnet, and rotor core is cylindrical shape, multiple groove is opened vertically at the outer surface of rotor core, described multiple groove is evenly distributed along rotor circumference direction, one piece of permanent magnet is embedded in each groove, rotor structure is simple, structural strength is high, and is applicable to run up.
It can be used for the fields such as driving system for electric vehicles, electric chief axis system and variable speed generation.
Accompanying drawing explanation
Fig. 1 is the electric machine structure schematic diagram of the rotor-exciting polyphase reluctance machine described in embodiment 1,
Fig. 2 is the electric machine structure schematic diagram of the rotor-exciting polyphase reluctance machine described in embodiment 2,
Fig. 3 is the electric machine structure schematic diagram of the rotor-exciting polyphase reluctance machine described in embodiment 3,
Fig. 4 is the rotor structure schematic diagram of traditional embedded permanent magnet permagnetic synchronous motor.
Embodiment
Embodiment one: the rotor-exciting polyphase reluctance machine described in present embodiment, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove successively alternately along the circumferential direction, along the circumferential direction, each tooth of armature core are wound with a coil, armature winding is m phase winding, m >=3, every adjacent k tooth and on institute's coiling form a facies unit, k >=2, form the coil in k tooth of a facies unit often on adjacent two teeth around on the contrary, and k coils connected in series is together; Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Embodiment 1: present embodiment is described see Fig. 1.An embodiment of the rotor-exciting polyphase reluctance machine of present embodiment is:
It comprises stators and rotators, air gap is left between stators and rotators, stator comprises armature core and armature winding, armature core is cylindrical shape, within it slot vertically, have 12 grooves altogether, form 12 teeth, successively alternately along the circumferential direction, armature winding is three-phase windings to the teeth groove formed, along the circumferential direction, the each tooth of armature core is wound with a coil, often adjacent two teeth and on institute's coiling form a facies unit, form two coils of a facies unit around on the contrary, and to be cascaded; Whole motor has 6 facies units, belongs to the facies unit coils connected in series of same phase together; Rotor is formed primarily of rotor core and permanent magnet, and at the outer surface of cylindrical rotor iron core, slot vertically, have 10 grooves altogether, embed one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Embodiment two: the difference of present embodiment and the rotor-exciting polyphase reluctance machine described in embodiment one is, described rotor number of poles Z rwith stator tooth number Z sbetween meet following relation: Z r=j (Z s, or Z ± 2) r=j (Z s± 1), Z s=k × m × n, j is positive integer.
Embodiment three: the rotor-exciting polyphase reluctance machine described in present embodiment, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove are successively alternately along the circumferential direction, along the circumferential direction, on a tooth, be wound with a coil at armature core, armature winding is m phase winding, m >=3, namely the tooth being wound with coil and the tooth not having coil are along the circumferential direction alternately arranged, each tooth and on institute's coiling form a facies unit;
Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together; The stator tooth width of coiling is not less than or equal to the stator tooth width being wound with coil,
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Embodiment 2: present embodiment is described see Fig. 2.An embodiment of the rotor-exciting polyphase reluctance machine of present embodiment is:
It comprises stators and rotators, air gap is left between stators and rotators, stator comprises armature core and armature winding, armature core is cylindrical shape, within it slot vertically, have 12 grooves altogether, form 12 teeth, successively alternately along the circumferential direction, armature winding is three-phase windings to the teeth groove formed.Along the circumferential direction, on a tooth, be wound with a coil at armature core, the tooth being namely wound with coil and the tooth not having coil are along the circumferential direction alternately arranged, and each coil forms a facies unit, whole motor has 6 facies units, belongs to the facies unit coils connected in series of same phase together; The stator tooth width of coiling is not less than or equal to the stator tooth width being wound with coil.Rotor is formed primarily of rotor core and permanent magnet, and at the outer surface of cylindrical rotor iron core, slot vertically, embed one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Embodiment four: the difference of present embodiment and the rotor-exciting polyphase reluctance machine described in embodiment one or three is, motor comprises m stator, and the described stator number of teeth is equal with rotor number of poles, and m stator is connected in series vertically; Along the circumferential direction, m rotor phase is identical, and m stator differs 360 °/m electrical degree successively.
Embodiment five: the rotor-exciting polyphase reluctance machine described in present embodiment, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, opens multiple groove vertically in the inner side of armature core, the tooth of formation and groove successively alternately along the circumferential direction,
Rotor number of poles Z rwith stator tooth number Z sbetween meet following relation: Z s=mqZ r, q is MgO-ZrO_2 brick, q>=1,
In each groove, embed armature winding, armature winding is the symmetrical lap winding of m or wave winding, m >=3;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
Embodiment six: the control method of the rotor-exciting polyphase reluctance machine of present embodiment according to embodiment one, two, three or five, motor adopts vector control, below base speed, direct-axis current i d> 0.
Embodiment seven: the difference of the control method of present embodiment and the rotor-exciting polyphase reluctance machine described in embodiment six is, rotor core yoke portion width will ensure under the non-excited state of stator winding, and yoke portion produces 20% ~ 100% of magnetic flux by every pole permanent magnet.
The difference of the control method of the rotor-exciting polyphase reluctance machine described in embodiment eight, present embodiment and embodiment six is, iron core is made up of high permeability material; Rotor core groove is semi-enclosed slot, semi-open slot or open slot.
The difference of the control method of the rotor-exciting polyphase reluctance machine described in embodiment nine, present embodiment and embodiment six is, rotor every pole permanent magnet is radially divided into i section, i be more than or equal to 1 natural number, there is magnetic conduction magnetic bridge between section and section.
Embodiment 3: present embodiment is described see Fig. 3.The embodiment of present embodiment is: rotor every pole permanent magnet is radially divided into two sections, there is a magnetic conduction magnetic bridge between two sections.
The difference of the control method of the rotor-exciting polyphase reluctance machine described in embodiment ten, present embodiment and embodiment six is, described motor is inner rotor core or outer-rotor structure; Described motor is single stator structure or double-stator structure, and described motor is radial magnetic field structure or axial magnetic field structure.
Motor described in present embodiment is used for motor or generator.
Operation principle of the present invention:
When certain phase armature winding electric current is zero, the magnetic flux that permanent magnet produces is closed voluntarily by the teeth portion of rotor core and yoke portion, not through air gap and stator armature winding interlinkage, when this motor uses as motor, location torque is zero or is zero substantially, when this motor uses as generator, the unloaded moment of resistance is zero or is zero substantially, and, at armature winding non-power status, armature winding does not produce induced electromotive force, can guarantee that motor drive power supply is in a safe condition, is conducive to preventing control device from damaging.
According to the rotor-position signal that rotor-position sensor exports, when control and drive system passes into the alternating current of appropriate phase in armature winding (can vector control be adopted), the magnetic flux that armature winding electric current produces is connected with the magnetic flux that permanent magnet produces, walk same path, two kinds of magnetic fluxs are jointly by rotor permanent magnet and rotor core tooth, common with stator armature winding intersecting chain, generation electromotive force; Because the magnetic line of force walks magnetic resistance minimal path, so attract each other between motor stator and rotor core tooth, produce tangential and radial electromagnetic force, wherein tangential electromagnetic force is on rotor, produces electromagnetic torque, drives rotor to rotate.At this moment armature winding electric current had both produced the electromagnetic torque of magnetic resistance character, controlled again the magnetic flux size that rotor permanent magnet produces, and then the size of controlled winding induced electromotive force.During embody rule, can according to the Torque and speed of load request, regulate armature winding electric current, increase or be reduced by rotor and with the magnetic flux of armature winding interlinkage, now, owing to not needing the weak magnetics detect adopting traditional permagnetic synchronous motor, and direct-axis current is greater than zero always, therefore, the generation of permanent magnet degaussing phenomenon can be prevented, also weak magnetoelectricity miscarriage pig copper consumption can be prevented, no matter and make air-gap field strengthen or weaken, only need control armature supply size variation, Current Control is simple, in addition, when high speed operation of motor, do not need to input weak magnetic reactive power from armature winding, therefore armature winding copper loss can be reduced, along with the rising of motor speed, in armature winding, direct-axis current reduces gradually, makes to reduce with the magnetic flux of stator and rotor interlinkage, the close reduction of stator and rotor magnetic unshakable in one's determination, can suppress motor iron loss.
If there is winding open fault, fault phase armature winding electric current is zero, thus fault phase can not have an impact mutually to other;
If there is winding interturn short-circuit fault, then fault phase winding current is out of hand, and electric current can decay to zero gradually, also can not have an impact mutually to other.
In sum, polyphase reluctance machine of the present invention has the features such as Constant-power speed range is wide, control is simple, fault-tolerant ability is strong.

Claims (11)

1. rotor-exciting polyphase reluctance machine, is characterized in that, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove successively alternately along the circumferential direction, along the circumferential direction, each tooth of armature core are wound with a coil, armature winding is m phase winding, m >=3, every adjacent k tooth and on institute's coiling form a facies unit, k >=2, form the coil in k tooth of a facies unit often on adjacent two teeth around on the contrary, and k coils connected in series is together; Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
2. rotor-exciting polyphase reluctance machine according to claim 1, is characterized in that, described rotor number of poles Z rwith stator tooth number Z sbetween meet following relation: Z r=j (Z s, or Z ± 2) r=j (Z s± 1), Z s=k × m × n, j is positive integer.
3. rotor-exciting polyphase reluctance machine, is characterized in that, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, multiple groove is opened vertically in the inner side of armature core, the tooth formed and groove are successively alternately along the circumferential direction, along the circumferential direction, on a tooth, be wound with a coil at armature core, armature winding is m phase winding, m >=3, namely the tooth being wound with coil and the tooth not having coil are along the circumferential direction alternately arranged, each tooth and on institute's coiling form a facies unit;
Described motor has m × n facies unit, and n is positive integer, belongs to the facies unit coils connected in series of same phase together; The stator tooth width of coiling is not less than or equal to the stator tooth width being wound with coil,
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
4. the rotor-exciting polyphase reluctance machine according to claim 1 or 3, is characterized in that, motor comprises m stator, and the described stator number of teeth is equal with rotor number of poles, and m stator is connected in series vertically; Along the circumferential direction, m rotor phase is identical, and m stator differs 360 °/m electrical degree successively.
5. rotor-exciting polyphase reluctance machine, is characterized in that, it comprises stators and rotators, leaves air gap between stators and rotators,
Stator comprises armature core and armature winding,
Armature core is cylindrical shape, opens multiple groove vertically in the inner side of armature core, the tooth of formation and groove successively alternately along the circumferential direction,
Rotor number of poles Z rwith stator tooth number Z sbetween meet following relation: Z s=mqZ r, q is MgO-ZrO_2 brick, q>=1,
In each groove, embed armature winding, armature winding is the symmetrical lap winding of m or wave winding, m >=3;
Rotor comprises rotor core and permanent magnet,
Rotor core is cylindrical shape, opens multiple groove vertically at the outer surface of rotor core, and described multiple groove is evenly distributed along rotor circumference direction, embeds one piece of permanent magnet, permanent magnet cutting orientation magnetizing in each groove, and often the magnetizing direction of adjacent two pieces of permanent magnets is contrary.
6. the control method of the rotor-exciting polyphase reluctance machine according to claim 1,2,3 or 5, is characterized in that, motor adopts vector control, below base speed, and direct-axis current i d> 0.
7. the control method of rotor-exciting polyphase reluctance machine according to claim 6, is characterized in that, rotor core yoke portion width will ensure under the non-excited state of stator winding, and yoke portion produces 20% ~ 100% of magnetic flux by every pole permanent magnet.
8. the control method of rotor-exciting polyphase reluctance machine according to claim 6, is characterized in that, iron core is made up of high permeability material; Rotor core groove is semi-enclosed slot, semi-open slot or open slot.
9. the control method of rotor-exciting polyphase reluctance machine according to claim 6, is characterized in that, rotor every pole permanent magnet is radially divided into i section, i be more than or equal to 1 natural number, there is magnetic conduction magnetic bridge between section and section.
10. the control method of rotor-exciting polyphase reluctance machine according to claim 6, is characterized in that, described motor is inner rotor core or outer-rotor structure; Described motor is single stator structure or double-stator structure; Described motor is radial magnetic field structure or axial magnetic field structure.
CN201410718830.8A 2014-12-01 2014-12-01 Rotor excitation multi-phase reluctance motor and control method thereof Active CN104467333B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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CN109643914A (en) * 2017-12-25 2019-04-16 深圳市大富科技股份有限公司 A kind of electric vehicle, switched reluctance machines and its stator and rotor sructure
CN110311522A (en) * 2019-07-15 2019-10-08 南京航空航天大学 A kind of four symmetrical electric excitation biconvex electrode electric machines
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