CN103384097A - Permanent magnet motor and method for manufacturing same - Google Patents
Permanent magnet motor and method for manufacturing same Download PDFInfo
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- CN103384097A CN103384097A CN2012101312919A CN201210131291A CN103384097A CN 103384097 A CN103384097 A CN 103384097A CN 2012101312919 A CN2012101312919 A CN 2012101312919A CN 201210131291 A CN201210131291 A CN 201210131291A CN 103384097 A CN103384097 A CN 103384097A
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Abstract
The invention provides a permanent magnet motor and a method for manufacturing the permanent magnet motor. The periphery of a magnetic pole of a permanent magnet of the motor is provided with a closed annular conductor, and the annular conductor surrounds the nonpolar face of the permanent magnet in order to prevent the permanent magnet from generating irreversible demagnetization during the running processing of the motor. The permanent magnet motor is low in manufacturing cost, excellent in performance and widely applicable to various mechanical devices for industries and civil use, wind-driven power generation, solar power generation, automobiles and industrial automation devices.
Description
Technical field
The present invention relates to a kind of manufacture method of magneto, more particularly, closed ring shaped conductor is installed in the periphery that relates to a kind of permanent magnet pole at common magneto, ring shaped conductor surrounds the non-polar plane of permanent magnet, in the running of motor, irreversible demagnetization occuring to suppress permanent magnet, thereby makes the method for low cost, high-performance permanent magnet motor, permanent magnet generator.Such magneto is widely used in various industry and the fields such as civilian plant equipment, wind power generation, solar power generation, automobile and industrial automation equipment.
Background technology
Motor based on electromagnetic induction principle comprises motor and generator, and the former is the device that converts electrical energy into mechanical energy, and the latter converts mechanical energy in the device of electric energy.In motor, for realizing the conversion between electric energy and mechanical energy, need to form magnetic field between stator and rotor, i.e. so-called excitation field.This excitation field can form by the current-carrying winding, also can form by permanent magnet.The motor that forms excitation field with permanent magnet is called magneto.Need to consume extra electric energy owing to forming excitation field with the current-carrying winding, not need to consume extra electric energy and form excitation field with permanent magnet, so magneto has significant characteristics of energy saving.In addition, aspect the conversion efficiency between electric energy and mechanical energy, magneto has very large advantage.On the other hand, under equal-wattage, compare with the conventional motor that forms excitation field with the current-carrying winding, magneto has also that volume is little, lightweight advantage.Today, magneto is widely used in the fields such as various industry and civilian plant equipment, wind power generation, solar power generation, automobile and industrial automation equipment and various household electrical appliance such as air-conditioning, refrigerator, washing machine, has become a requisite part in national economy and people life.
Be suitable for magneto of a great variety of various different purposes, usually be divided into rotary permanent-magnet motor and the large class of orthoscopic magneto two.Wherein, the rotary permanent-magnet motor application is the widest.The difference of the mounting means by permanent magnet in electric rotary machine is divided into again three kinds of surface-mount type, interpolation type and disc types.Accompanying drawing 1 is the schematic cross section of common surface-mounted permanent magnet machine, and wherein, permanent magnet 2 is arranged on the outer surface of rotor 3, forms in magnetic loops and the air gap between stator and rotor 1 with the stator 5 of coaxial setting and produces excitation field.In the accompanying drawings, represent the arctic of permanent magnet with N, S represents the South Pole of permanent magnet.When rotor 3 rotates together in company with permanent magnet 2, be inlaid in winding 4 in stator 5 because cutting magnetic line produces induced electromotive force, externally output current.Like this, putting on that mechanical energy on rotor 3 just converted to can be by the electric energy of winding 4 outputs, the operation principle of Here it is permanent magnet generator.Conversely, if in winding 4 input current, this electric current can produce a magnetic field and with interacted by the excitation field in the formed air gap 1 of permanent magnet 2, form and drive the power that permanent magnet 2 rotates together in company with rotor 3, thereby externally export mechanical force moment.Like this, putting on that electric energy in winding 4 just converted to can be by the mechanical energy of rotor 3 outputs, the operation principle of Here it is permanent magnet motor.As seen, the operation principle of permanent magnet motor and permanent magnet generator all is based on electromagnetic induction principle, therefore, in elaboration below the present invention, as long as illustrated that the operation principle of permanent magnet motor has also just illustrated the operation principle of permanent magnet generator simultaneously, specialize as nothing, magneto of the present invention had both comprised that permanent magnet motor also comprised permanent magnet generator.
In accompanying drawing 1, permanent magnet 2 is arranged on the outer surface of rotor 3, is commonly referred to surface-mounted permanent magnet machine.Be in due to rotor 3 in the chamber of stator 5, so also referred to as the internal rotor permanent magnet motor.Obviously, circularize if rotor 3 is done, in rotor 3 chambeies that the stator 5 that is embedded with winding 4 is arranged at coaxially, permanent magnet 2 also can be arranged on the inner surface of rotor 3, and as shown in Figure 2, this structure is also referred to as outer rotor type permanent-magnet machine.Obviously, outer rotor type permanent-magnet machine is identical with the operation principle of internal rotor permanent magnet motor.Therefore, in elaboration below the present invention, as long as illustrated that the operation principle of internal rotor permanent magnet motor has also just illustrated the operation principle of outer rotor type permanent-magnet machine simultaneously, specialize as nothing, magneto of the present invention had both comprised that the internal rotor permanent magnet motor also comprised outer rotor type permanent-magnet machine.
Easily understand, be to improve the utilization ratio of permanent magnet magnetic flux in the interpolation type magneto, can be parallel in rotor 3 axial groove 6 be processed between adjacent groove and groove angled, in permanent magnet 2 embedding slots 6, form V-shape interpolation type magneto, as shown in Figure 4.Obviously, the operation principle of V-shape interpolation type magneto is identical with the operation principle of common interpolation type magneto.Therefore, in elaboration below the present invention, as long as illustrated that the operation principle of interpolation type magneto has also just illustrated the operation principle of various V-shape interpolation type magnetoes simultaneously, specialize as nothing, magneto of the present invention had both comprised that common interpolation type magneto also comprised various forms of V-shape interpolation type magnetoes.
In addition, for large-scale magneto, for improving for the manufacture of the material use efficient of the silicon steel sheet of rotor core and making permanent magnet 2 more easily install, usually silicon steel sheet stamping-out and closed assembly are become the box unshakable in one's determination 7 with the dovetail structure, permanent magnet 2 is arranged in described box unshakable in one's determination 7, be made into magnetic pole unit one by one, more described magnetic pole unit is installed on solid steel rotor 3, as shown in Figure 5.Obviously, such structure also belongs to the interpolation type magneto, specializes as nothing, and magneto of the present invention also comprises the interpolation type magneto that is combined into rotor magnetic pole with the magnetic pole unit of silicon steel plate core box making.
Be easy to infer, if stator and the rotor coaxial of rotary permanent-magnet motor is arranged in parallel, can form disc-type permanent magnet motor as shown in Figure 6.Identical with the principle of previously described various magnetoes, the excitation field in air gap 1 is to produce by permanent magnet 2 and core rotor 3 and stator 5 formed magnetic loops equally.When in the winding in stator 5 during input current, this electric current can produce a magnetic field and with interacted by the excitation field in the formed air gap 1 of permanent magnet 2, form the power that permanent magnet 2 rotates together with rotor 3 that drives, thereby externally export mechanical force moment by driving shaft 8.Therefore, magneto of the present invention also comprises the disc-type permanent magnet motor that stator and rotor coaxial are arranged in parallel.
If stator and the rotor of rotary permanent-magnet motor tangentially are launched into straight line, obtain orthoscopic magneto as shown in Figure 7.Wherein, the winding 4 in stator 5 and the permanent magnet 2 that is placed on rotor 3 are arranged in the linear array that is parallel to each other.When being placed in winding 4 input current of stator 5, this electric current can produce a magnetic field and with interacted by the excitation field in the formed air gap 1 of permanent magnet 2, drive permanent magnet 2 and do reciprocating linear motion together in company with rotor 3.Obviously, the orthoscopic magneto is identical with the principle of rotary permanent-magnet motor, and therefore, magneto of the present invention also comprises the orthoscopic magneto that stator and rotor do reciprocating linear motion mutually.
As known in the art, the disadvantage of magneto is that permanent magnet as magnetic pole easily produces irreversible demagnetization in the running of motor.The magnetic moment that this irreversible demagnetization refers to permanent magnetism magnetic pole compares with the operation initial condition certain ratio that descended, and perhaps the magnetic moment of permanent magnetism magnetic pole disappears fully, and can not naturally return to its initial condition.In magneto, to produce the reason of irreversible demagnetization be the flex point that the operating load point of permanent magnet has exceeded the demagnetization curve of permanent magnet to permanent magnetism magnetic pole.The factor of flex point that makes the operating load point of magnet exceed the demagnetization curve of permanent magnet mainly contains 2 points: the one, and the winding of motor produces huge current flow because of short circuit or traffic overload and the reverse high-intensity magnetic field that forms produces demagnetization to permanent magnetism magnetic pole; Next is because the working temperature of motor is too high, and the coercivity temperature of permanent magnet raises and descends, make the operating load point of permanent magnet at high temperature exceed permanent magnet demagnetization curve flex point and produce irreversible demagnetization.In order to prevent the irreversible demagnetization of permanent magnet, Design of PM Motor person usually selects to have and can resist reverse high-intensity magnetic field demagnetization and the demagnetization of opposing high temperature, at room temperature has the very permanent magnetic material of high-coercive force.Particularly, the reverse high-intensity magnetic field that produces in order to prevent motor from producing unexpected short circuit or traffic overload under the condition of high temperature of operation produces dual demagnetization to permanent magnetism magnetic pole, often needs to select the more coercitive permanent magnetic material of high target.Nineteen eighty-three invention third generation rare-earth permanent magnet---neodymium iron boron (Nd-Fe-B) permanent magnet is called as " magnetic king ", be the highest permanent magnetic material of magnetic up to now, be also the permanent magnetic material that is most widely used in Modern PM Electrical Machines.Can resist the demagnetization of reverse high-intensity magnetic field and the demagnetization of opposing high temperature in order to obtain to have, at room temperature have the very Nd-Fe-Bo permanent magnet material of high-coercive force, need to add a large amount of expensive heavy rare earth element dysprosium (Dy) or terbiums (Tb) in Nd Fe B alloys.This just makes the magneto made from neodymium iron boron with high costs.In addition, by the ferromagnetics principle as can be known, coercive force is higher usually its remanent magnetism of permanent magnetic material and magnetic energy product are just lower.So, select coercive force higher, simultaneously cost also higher permanent magnetic material just be equal to and select remanent magnetism and the lower permanent magnetic material of magnetic energy product, this just requires again the volume of permanent magnetic material used larger conversely, thereby limited the ratio of performance to price of magneto, become the production cost that reduces magneto, the main restricting factor that reduces the volume and weight of motor.
The present invention is for overcoming this not enough putting forward of existing magneto.By at the peripheral ring shaped conductor that closure is installed of the non-polar plane of permanent magnet pole, to suppress permanent magnet, the demagnetization phenomenon occurs in the running of motor, thereby can make low cost, high performance magneto.
Summary of the invention
A main purpose of the present invention is to provide a kind of magneto, and comprising: stator is embedded with winding; Rotor; And be arranged on permanent magnet on rotor outer surface, it is characterized in that: closed ring shaped conductor is installed in the periphery at permanent magnet pole, ring shaped conductor surrounds the non-polar plane of permanent magnet pole, in the running of motor, irreversible demagnetization occurs to suppress permanent magnet.
Another main purpose of the present invention is to provide a kind of magneto, comprising: stator is embedded with winding; Rotor, wherein have the groove that is parallel to rotor axial in rotor, permanent magnet is arranged in groove, it is characterized in that: closed ring shaped conductor is installed in the periphery at permanent magnet pole, ring shaped conductor surrounds the non-polar plane of permanent magnet pole, in the running of motor, irreversible demagnetization occurs to suppress permanent magnet.
According to a preferred aspect of the present invention, the ring shaped conductor of described closure is the closed annular conductor of single turn, and the non-polar plane that is arranged on permanent magnet pole is peripheral.
According to another preferred aspect of the present invention, the ring shaped conductor of described closure is to be covered with the loop coil of the multiturn that the wire coiling of insulating barrier forms by outer surface, the end to end formation closed-loop path of wire, and the non-polar plane that is arranged on permanent magnet pole is peripheral.
According to another preferred aspect of the present invention, the height of the ring shaped conductor of described closure is equal to or less than the height of the magnetizing direction of permanent magnet pole; During less than the height of the magnetizing direction of permanent magnet pole, preferably the closed annular conductor is arranged on excitation field air gap one side of the close motor of permanent magnet pole when the height of closed annular conductor.
Preferably, with insulating cement or mechanical device, that the non-polar plane that described closed annular conductor is fixed on permanent magnet pole is peripheral, and make between the non-polar plane of described closed annular conductor and permanent magnet pole and insulate.
According to another preferred aspect of the present invention, described permanent magnet pole is single permanent magnet, and perhaps the permanent magnet by a plurality of same polarities is spliced.
Preferably, described closed annular conductor is to be made with the conductivity such as copper, aluminium good metal and alloy thereof; Described permanent magnet is sintered body or the cohesive body of rare-earth permanent magnet such as Nd-Fe-B, Sm-Co, or aluminium nickel cobalt, ferrite, platinum cobalt alloy class permanent magnet.
The present invention also provides a kind of method of making aforesaid permanent magnet motor, comprising the periphery at permanent magnet pole, closed ring shaped conductor is installed, and ring shaped conductor surrounds the non-polar plane of permanent magnet pole.
Description of drawings
Illustrate that below in conjunction with accompanying drawing the specific embodiment of the present invention is with further elaboration principle of the present invention.
Fig. 1 represents the schematic cross section of common surface-mounted permanent magnet machine;
Fig. 2 represents the schematic cross section of common outer rotor type permanent-magnet machine;
Fig. 3 represents the schematic cross section of common interpolation type magneto;
Fig. 4 represents the schematic cross section of common V-shape interpolation type magneto;
Fig. 5 represents the common magnetic pole unit made from the silicon steel plate core box and is combined into the schematic cross section of the interpolation type magneto of rotor magnetic pole;
The side-looking generalized section of the common disc-type permanent magnet motor of Fig. 6 (a) expression, Fig. 6 (b) represents the schematic top plan view of the rotor portion of this disc-type permanent magnet motor;
Fig. 7 represents the side generalized section of common linear permanent-magnet motor;
Fig. 8 represents the schematic cross section of surface-mounted permanent magnet machine of the present invention;
Fig. 9 (a) and (b) represent respectively permanent magnet pole in accompanying drawing 8 and schematic cross section and the top cross-sectional view of peripheral closed annular conductor thereof;
Figure 10 (a) and (b) the expression ring that rolls into required size, shape with the good metal of the conductivity such as copper, aluminium and alloy thereof respectively, then with interface seam or the mechanical stravismus schematic diagram that is overlapped to form closed hoop;
That Figure 11 represents is that the wire coiling by the appearance insulation of the non-polar plane periphery that is arranged on permanent magnet pole of the present invention forms, the stravismus schematic diagram of the ring shaped conductor of the end to end multiturn that forms the closed-loop path of wire;
Figure 12 represents the schematic cross section of outer rotor type permanent-magnet machine of the present invention;
Figure 13 (a) and represent respectively that (b) periphery of a permanent magnet pole in accompanying drawing 12 installs the stravismus schematic diagram of the closed annular conductor of differing heights;
Figure 14 represents the schematic cross section of interpolation type magneto of the present invention;
Figure 15 represents permanent magnet pole in accompanying drawing 14 and the stravismus generalized section of closed annular conductor;
Figure 16 represent of the present invention making with the silicon steel plate core box the permanent magnet magnetic pole unit and be combined into the schematic cross section of the interpolation type magneto of rotor magnetic pole;
Figure 17 represents permanent magnet pole in accompanying drawing 16 and the stravismus generalized section of closed annular conductor;
Figure 18 (a) and (b) represent respectively the side generalized section of disc-type permanent magnet motor of the present invention and the schematic top plan view of rotor portion;
Figure 19 (a) and (b) represent respectively the side generalized section of linear permanent-magnet motor of the present invention and the top cross-sectional view of rotor portion.
In figure, 1 expression excitation field air gap, 2 expression permanent magnets, 3 expression rotors, 4 expression windings, 5 expression stators, 6 expressions are used for installing the hole slot of permanent magnet, the magnetic pole unit that 7 expressions are made with the silicon steel plate core box, 8 expression driving shafts, 9 expression closed annular conductors of the present invention, the soldering opening of 10 expression closed annular conductors, the machinery overlap joint mouth of 11 expression closed annular conductors, the 12 end to end interfaces of expression wire.
Embodiment
Illustrate below with reference to accompanying drawings according to the periphery of the permanent magnet pole at common magneto of the present invention closed ring shaped conductor is installed, ring shaped conductor surrounds the non-polar plane of permanent magnet, in the running of motor, irreversible demagnetization occuring to suppress permanent magnet, thereby makes principle and the preferred embodiment of low cost, high-performance permanent magnet motor, permanent magnet generator product.
Embodiment one
The periphery of the accompanying drawing 8 expression permanent magnet pole at common surface-mounted permanent magnet machine of the present invention is equipped with the schematic cross section of closed ring shaped conductor.Accompanying drawing 9 (a) and (b) provided respectively permanent magnet pole in accompanying drawing 8 and schematic cross section and the top cross-sectional view of peripheral closed annular conductor thereof.Can be more clearly visible from accompanying drawing 9, in accompanying drawing 8, the periphery of the non-polar plane of each permanent magnet pole 2 all is equipped with closed annular conductor 9 of the present invention.
When the winding of motor short circuit once in a while or traffic overload occurs and produces huge current flow and the reverse high-intensity magnetic field that forms when permanent magnetism magnetic pole 2 is produced demagnetizing effect, by Faraday's electromagnetic induction law as can be known, namely can produce simultaneously induced electromotive force in closed annular conductor 9; Because the resistance of closed annular conductor 9 is very little, this induced electromotive force will form powerful ring current in closed annular conductor 9, just in time offsets reverse high-intensity magnetic field that described winding produces to the demagnetizing effect of permanent magnetism magnetic pole 2 by this electric current formed magnetic field.That is to say, based on Faraday's electromagnetic induction law, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention has the magnetic flux that makes permanent magnet pole 2 and keeps invariable effect.So, short circuit once in a while or traffic overload occur and produce the formed reverse high-intensity magnetic field of huge current flow and all can't produce demagnetizing effects to permanent magnetism magnetic pole 2 in any winding because of motor.
secondly, because the working temperature of motor is too high, the coercivity temperature of permanent magnet raises and descends, when making the operating load point of permanent magnet at high temperature close on the flex point of demagnetization curve of permanent magnet, because the magnetic flux of permanent magnet can produce unexpected decline at the flex point place of its demagnetization curve, equally by Faraday's electromagnetic induction law, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention has the magnetic flux that makes permanent magnet pole 2 and keeps invariable effect, thereby can produce simultaneously powerful ring current closed annular conductor 9 is interior, form the magnetic field of forward, the magnetic flux decay of opposing permanent magnet pole 2, keep the operating load point of permanent magnet on the flex point of demagnetization curve, thereby avoid permanent magnet pole 2 to produce irreversible demagnetization.
Obviously, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention can not be kept motor and works at the temperature of infinite height.The Main Function of the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention is the irreversible demagnetization to permanent magnetism magnetic pole 2 of avoiding any working temperature because of motor sharply to raise and produce, and any because of winding occur short circuit once in a while or moment traffic overload produce the demagnetizing effect that the formed reverse high-intensity magnetic field of huge current flow produces permanent magnetism magnetic pole 2.
As known in the insider, the practical working situation of magneto is often very complicated, need particularly that high load capacity, environment are poor, the motor of long-term work and frequent starting, the phenomenon that its working temperature sharply raises and short circuit once in a while or traffic overload occur winding often is difficult to avoid.Even if working temperature transducer and traffic overload transducer have been installed in magneto, in case occur that the working temperature of described motor sharply raises and the phenomenon of short circuit once in a while or traffic overload occurs winding, irreversible demagnetization has often occured and can't return to initial operating state in the permanent magnet in motor.For preventing that working temperature because of motor from sharply raising and winding short circuit once in a while or traffic overload occurs to the irreversible demagnetization phenomenon of permanent magnetism magnetic pole 2, design of electrical motor person usually selects to have and can resist the demagnetization of reverse high-intensity magnetic field and the demagnetization of opposing high temperature, at room temperature has the very permanent magnetic material of high-coercive force.But its cost of permanent magnetic material that coercive force is higher usually is also higher, and its remanent magnetism of permanent magnetic material that coercive force is higher and magnetic energy product are just lower.So, select coercive force higher, simultaneously cost also higher permanent magnetic material just be equal to and select remanent magnetism and the lower permanent magnetic material of magnetic energy product, this just requires again the volume of permanent magnetic material used larger conversely, thereby limited the ratio of performance to price of magneto, become the production cost that reduces magneto, the main restricting factor that reduces the volume and weight of motor.
as mentioned before, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention has the magnetic flux that makes permanent magnet pole 2 and keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
Obviously, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention, refer to can circulate the therein ring shaped conductor of conducting of electric current, can be processed into as shown in Figure 9 integral loop with punching press, the mode of cutting out with the good metal of the conductivity such as copper, aluminium and alloy thereof, the ring that also can roll into required size, shape with the good metal of the conductivity such as copper, aluminium and alloy thereof, but again with interface seam or the mechanical closed hoop that is overlapped to form On current, as accompanying drawing 10 (a) with (b).
Explanation in passing, be equipped with the film made from electrical insulating material between the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention and permanent magnet pole 2, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
In addition, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention, also can be covered with the loop coil of the multiturn that the wire coiling of insulating barrier forms by outer surface, the end to end formation closed-loop path of wire, as shown in Figure 11.Wherein, permanent magnet pole 2 is arranged on rotor 3, this moment permanent magnet pole 2 N extremely near the excitation field air gap of motor, the height of the loop coil conductor 9 of multiturn is less than the height of the magnetizing direction of permanent magnet pole 2, and the excitation field air gap that installs around at the close motor of permanent magnet pole 2 is the N utmost point one side.
Here specify, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention, no matter be the closed hoop of the single turn as shown in accompanying drawing 9, accompanying drawing 10, still as shown in Figure 11 the loop coil of formation closed-loop path of multiturn, it highly is equal to or less than the height of the magnetizing direction of permanent magnet pole 2; During less than the height of the magnetizing direction of permanent magnet pole 2, preferably closed annular conductor 9 is arranged on excitation field air gap one side of the close motor of permanent magnet pole 2, as shown in Figure 11 when the height of closed annular conductor 9.
Professional as the industry is known, permanent magnet pole 2 is fixed on rotor 3 by binding agent together with closed annular conductor 9, perhaps be fixed on rotor 3 with the known mechanical system of the industry, perhaps with the known coating epoxy resin of the industry and/or glass wool cloth, permanent magnet pole 2 is wrapped up in together with closed annular conductor 9 and be contained on rotor 3, these all belong to the known routine techniques of the industry, so, the explanation that embodiments of the invention one and following embodiment have all omitted relevant these details.
Embodiment two
The periphery of the accompanying drawing 12 expression permanent magnet pole at common external rotor surface-mounted permanent magnet machine of the present invention is equipped with the schematic cross section of closed ring shaped conductor.Professional as the industry is known, the external rotor surface-mounted permanent magnet machine of such structure often is applied to powerful wind-driven generator, this moment, the pole dimension in motor was very large, and each magnetic pole 2 is all that the permanent magnet by several same polarities is spliced.Accompanying drawing 13 (a) has provided permanent magnet pole 2 in accompanying drawing 12 and the stravismus schematic diagram of peripheral closed annular conductor 9 thereof.Similar with embodiment one, the height of closed annular conductor 9 is equal to or less than the height of the magnetizing direction of permanent magnet pole 2; When the height of closed annular conductor 9 during less than the height of the magnetizing direction of permanent magnet pole 2, preferably closed annular conductor 9 is arranged on excitation field air gap one side of the close motor of permanent magnet pole 2, excitation field air gap one side of the extremely close motor of the S of one of them permanent magnet pole 2 as shown in accompanying drawing 13 (b).
Identical with embodiment one, closed annular conductor 9 also can be covered with by outer surface the loop coil of the multiturn that the wire coiling of insulating barrier forms, and the end to end formation closed-loop path of wire makes.And, be arranged between the closed annular conductor 9 of non-polar plane periphery of permanent magnet pole 2 and permanent magnet pole 2 and be equipped with the film made from electrical insulating material, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
Obviously, the principle of the present embodiment is identical with embodiment one, therefore omitted the detailed description about its operation principle.
because having the magnetic flux that makes permanent magnet pole 2, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization phenomenon that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
In addition, professional as the industry is known, permanent magnet pole 2 is fixed on rotor 3 by binding agent together with closed annular conductor 9, perhaps be fixed on rotor 3 with the known mechanical system of the industry, perhaps with the known coating epoxy resin of the industry and/or fixed cover, permanent magnet pole 2 is wrapped up in together with closed annular conductor 9 and be contained on rotor 3, these all belong to the known routine techniques of the industry, so embodiments of the invention have omitted the explanation of relevant these details.
Embodiment three
The periphery of the accompanying drawing 14 expression permanent magnet pole at common interpolation type magneto of the present invention is equipped with the schematic cross section of closed ring shaped conductor.Professional as the industry is known, has in rotor 3 to be parallel to axial groove 6, and permanent magnet 2 is arranged in groove 6.The lateral dimensions of groove 6 needs larger than the width of permanent magnet 2, has certain gap between two non-polar planes that make permanent magnet 2 and the two sides of groove 6, with the magnetic flux utilization ratio of raising permanent magnet 2.The ring shaped conductor of closure of the present invention just is mounted in described gap.Accompanying drawing 15 has provided permanent magnet pole 2 in accompanying drawing 14 and the stravismus generalized section of peripheral closed annular conductor 9 thereof.
Identical with embodiment one, closed annular conductor 9 also can be covered with by outer surface the loop coil of the multiturn that the wire coiling of insulating barrier forms, and the end to end formation closed-loop path of wire makes.And, be arranged between the closed annular conductor 9 of non-polar plane periphery of permanent magnet pole 2 and permanent magnet pole 2 and be equipped with the film made from electrical insulating material, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
Obviously, the principle of the present embodiment is identical with embodiment one, therefore omitted the detailed description about its operation principle.
because having the magnetic flux that makes permanent magnet pole 2, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization phenomenon that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
Embodiment four
The accompanying drawing 16 expressions schematic cross section that is combined into the interpolation type magneto of rotor magnetic pole at common magnetic pole unit with the making of silicon steel plate core box of the present invention.Permanent magnet 2 is placed in interior with the silicon steel plate core box 7 of swallowtail shape and is fixed in rotor core 3.Professional as the industry is known, the interpolation type magneto of such structure often is applied to powerful wind-driven generator, this moment, the pole dimension in motor was larger, and each magnetic pole 2 is usually that the permanent magnet by several same polarities is spliced together with the silicon steel plate core box.In addition, similar with small-sized interpolation type magneto, at the interior installation permanent magnet 2 of axial groove 6 of being parallel to of silicon steel plate core box 7.The lateral dimensions of groove 6 needs larger than the width of permanent magnet pole 2, has certain gap between two non-polar planes that make permanent magnet pole 2 and the side of the groove 6 of silicon steel plate core box 7, with the magnetic flux utilization ratio of raising permanent magnet pole 2.The ring shaped conductor of closure of the present invention just is mounted in described gap.Accompanying drawing 17 has provided the stravismus generalized section of magnetic pole unit being placed in accompanying drawing 16 in the silicon steel plate core box and peripheral closed annular conductor 9 thereof.
Like this with the permanent magnet of several same polarities together with the be spliced interpolation type magneto of a rotor magnetic pole of silicon steel plate core box, the size of its magnetic pole is larger, therefore, adopt the ring that rolls into required size, shape with the good metal of the conductivity such as copper, aluminium and alloy thereof as shown in Figure 17, again interface seam or machinery are overlapped to form closed annular conductor 9, and make the interface of the interface of seam or machinery overlap joint at the afterbody of permanent magnet pole 2, operate so more convenient, cost of manufacture is cheaper.And, be arranged between the closed annular conductor 9 of non-polar plane periphery of permanent magnet pole 2 and permanent magnet pole 2 and be equipped with the film made from electrical insulating material, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
Obviously, the principle of the present embodiment is identical with embodiment one, therefore omitted the detailed description about its operation principle.
because having the magnetic flux that makes permanent magnet pole 2, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization phenomenon that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
Embodiment five
Accompanying drawing 18 (a) and represent respectively that (b) periphery of the permanent magnet pole at common disc-type permanent magnet motor of the present invention is equipped with schematic cross section and the schematic top plan view of closed ring shaped conductor.
Identical with embodiment one, closed annular conductor 9 also can be covered with by outer surface the loop coil of the multiturn that the wire coiling of insulating barrier forms, and the end to end formation closed-loop path of wire makes.And, be arranged between the closed annular conductor 9 of non-polar plane periphery of permanent magnet pole 2 and permanent magnet pole 2 and be equipped with the film made from electrical insulating material, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
Obviously, the principle of the present embodiment is identical with embodiment one, therefore omitted the detailed description about its operation principle.
because having the magnetic flux that makes permanent magnet pole 2, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization phenomenon that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
Embodiment six
Accompanying drawing 19 (a) and represent respectively that (b) periphery of the permanent magnet pole at common linear permanent-magnet motor of the present invention is equipped with schematic cross section and the top cross-sectional view of closed ring shaped conductor.
Identical with embodiment one, closed annular conductor 9 also can be covered with by outer surface the loop coil of the multiturn that the wire coiling of insulating barrier forms, and the end to end formation closed-loop path of wire makes.And, be arranged between the closed annular conductor 9 of non-polar plane periphery of permanent magnet pole 2 and permanent magnet pole 2 and be equipped with the film made from electrical insulating material, damage permanent magnet pole 2 with the arc discharge that prevents from producing because the induced voltage in ring shaped conductor 9 is excessive.
Obviously, the principle of the present embodiment is identical with embodiment one, therefore omitted the detailed description about its operation principle.
because having the magnetic flux that makes permanent magnet pole 2, the closed annular conductor 9 of the non-polar plane periphery that is arranged on permanent magnet pole 2 of the present invention keeps invariable effect, can resist that any working temperature because of motor sharply raises and the irreversible demagnetization phenomenon that short circuit once in a while or traffic overload produce permanent magnetism magnetic pole 2 occurs winding, thereby, design of electrical motor person does not just need the coercive force of permanent magnetism magnetic pole 2 is set excessive coefficient of safety, thereby can select coercive force relatively low, remanent magnetism and magnetic energy product are relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, reduce the volume and weight of motor.
The worker of this area should be understood that, in each embodiment explained above, by closed ring shaped conductor being installed the non-polar plane of the permanent magnet pole of common magneto is peripheral, thereby can select that coercive force is relatively low, remanent magnetism and magnetic energy product is relatively high, also lower permanent magnetic material of cost simultaneously, the volume of permanent magnetic material used so just can reduce, thereby improve the ratio of performance to price of magneto, reduce the production cost of magneto, the principle that reduces the volume and weight of motor is identical.
The above describes principle and the method for making low-cost, high-quality magneto product disclosed according to the present invention in detail with reference to accompanying drawing, those skilled in the art can make principle disclosed according to the present invention and method magneto and be applied to various fields thus, for example be applied to be applied to wind power generation, electric motor of automobile and various industrial automation equipment, various household electrical appliance such as air-conditioning, refrigerator, washing machine etc. in various industry and civilian motor.
The above describes a plurality of embodiment of the present invention in detail with reference to accompanying drawing, but top embodiment is only to of the present invention schematically illustrating and unrestricted the present invention.In addition, although above be with separately, the form of separating describes each embodiment, those skilled in the art are to be appreciated that above-mentioned a plurality of embodiment also can use in combination.And those skilled in the art can make various modifications and variations to the present invention in conjunction with the technology that has conventional manufacturing magneto now after having read above-mentioned explanation, within this modifications and variations also drop on protection scope of the present invention.
Claims (9)
1. magneto, comprising: stator is embedded with winding; Rotor; And be arranged on permanent magnet on rotor outer surface, it is characterized in that: closed ring shaped conductor is installed in the periphery at permanent magnet pole, and ring shaped conductor surrounds the non-polar plane of permanent magnet pole, in the running of motor, irreversible demagnetization occurs to suppress permanent magnet.
2. magneto, comprising: stator is embedded with winding; Rotor, wherein have the groove that is parallel to rotor axial in rotor, permanent magnet is arranged in groove, it is characterized in that: closed ring shaped conductor is installed in the periphery at permanent magnet pole, ring shaped conductor surrounds the non-polar plane of permanent magnet pole, in the running of motor, irreversible demagnetization occurs to suppress permanent magnet.
3. magneto according to claim 1 and 2, wherein: the ring shaped conductor of described closure is the closed annular conductor of single turn, the non-polar plane that is arranged on permanent magnet pole is peripheral.
4. magneto according to claim 1 and 2, wherein: the ring shaped conductor of described closure is to be covered with the loop coil of the multiturn that the wire coiling of insulating barrier forms by outer surface, the end to end formation closed-loop path of wire, the non-polar plane that is arranged on permanent magnet pole is peripheral.
5. magneto according to claim 1 and 2, wherein: the height of the ring shaped conductor of described closure is equal to or less than the height of the magnetizing direction of permanent magnet pole; During less than the height of the magnetizing direction of permanent magnet pole, the closed annular conductor is arranged on excitation field air gap one side of the close motor of permanent magnet pole when the height of closed annular conductor.
6. magneto according to claim 1 and 2, wherein: with insulating cement or mechanical device, that the non-polar plane that described closed annular conductor is fixed on permanent magnet pole is peripheral, and make between the non-polar plane of described closed annular conductor and permanent magnet pole and insulate.
7. magneto according to claim 1 and 2, wherein: described permanent magnet pole is single permanent magnet, and perhaps the permanent magnet by a plurality of same polarities is spliced.
8. the manufacture method of magneto according to claim 1 and 2, wherein: described closed annular conductor is to be made with copper, aluminium and alloy thereof; Described permanent magnet is sintered body or the cohesive body that rare-earth permanent magnet comprises Nd-Fe-B, Sm-Co, or aluminium nickel cobalt, ferrite, platinum cobalt alloy class permanent magnet.
9. a method of making the described permanent magnet motor of one of claim 1～8, install closed ring shaped conductor comprising the periphery at permanent magnet pole, and ring shaped conductor surrounds the non-polar plane of permanent magnet pole.
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| CN2012101312919A CN103384097A (en) | 2012-05-02 | 2012-05-02 | Permanent magnet motor and method for manufacturing same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101312919A CN103384097A (en) | 2012-05-02 | 2012-05-02 | Permanent magnet motor and method for manufacturing same |
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| CN103384097A true CN103384097A (en) | 2013-11-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108124105A (en) * | 2018-02-02 | 2018-06-05 | 西南石油大学 | Electric system |
| CN109962546A (en) * | 2017-12-26 | 2019-07-02 | 丰田自动车株式会社 | Rotor |
| CN111106733A (en) * | 2019-12-11 | 2020-05-05 | 南京理工大学 | Asynchronous starting permanent magnet synchronous linear motor and control method thereof |
| CN111319590A (en) * | 2018-12-14 | 2020-06-23 | 江苏联博精密科技有限公司 | High-efficiency novel rotor design for automobile brake |
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|---|---|---|---|---|
| JP2008125242A (en) * | 2006-11-13 | 2008-05-29 | Meidensha Corp | Permanent magnet type synchronous electric motor |
| CN101944788B (en) * | 2010-07-06 | 2013-03-13 | 东元总合科技（杭州）有限公司 | Rotor of high-power permanent magnet motor and permanent magnet synchronous wind-driven generator using same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008125242A (en) * | 2006-11-13 | 2008-05-29 | Meidensha Corp | Permanent magnet type synchronous electric motor |
| CN101944788B (en) * | 2010-07-06 | 2013-03-13 | 东元总合科技（杭州）有限公司 | Rotor of high-power permanent magnet motor and permanent magnet synchronous wind-driven generator using same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962546A (en) * | 2017-12-26 | 2019-07-02 | 丰田自动车株式会社 | Rotor |
| CN108124105A (en) * | 2018-02-02 | 2018-06-05 | 西南石油大学 | Electric system |
| CN108124105B (en) * | 2018-02-02 | 2019-12-10 | 西南石油大学 | Electric machine system |
| CN111319590A (en) * | 2018-12-14 | 2020-06-23 | 江苏联博精密科技有限公司 | High-efficiency novel rotor design for automobile brake |
| CN111106733A (en) * | 2019-12-11 | 2020-05-05 | 南京理工大学 | Asynchronous starting permanent magnet synchronous linear motor and control method thereof |
| CN111106733B (en) * | 2019-12-11 | 2022-04-01 | 南京理工大学 | Asynchronous starting permanent magnet synchronous linear motor and control method thereof |
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Application publication date: 20131106 |