SI21830A - Synchronous electromechanical transducer - Google Patents

Abstract

The synchronous mechanical transducer solves the problem of providing a synchronous high-torque motor or generator with a very small arresting torque, high efficiency of the permanent magnet mass and a high capacity of removing heat. The transducer includes a rotor with an even number of approximately evenly distributed changeably oriented magnetic poles, preferably permanent magnets and at least one stator, which includes the same number of equally distributed poles of each of the at least two electrical phases, which are grouped into closed groups at the borders where the equalization of the electric phase of the stator with the magnetic phase of the stator takes place. The pole winding of the individual groups of stator poles belong to the same electrical phase, where the windings of the adjacent poles within a group are wound into opposite directions. The number of rotor poles differs by at least two from the overall number of poles of all electrical phases. The stator poles can be distributed evenly or irregularly. The rotor poles can be oriented radially towards the axis or parallel to the rotation axis, while even a linear implementation of the transducer is possible.

Description

SYNCHRONOUS

ELECTROMECHANICAL CONVERTER

The subject of the invention is the construction of a synchronous electromechanical converter.

The invention belongs to the international classification in H02K1 / 14, H02K 16/04, H02K 21/12 and H02K 26.

A technical problem solved by the invention is the construction of a synchronous electromechanical transducer, which allows a large gap between the torque per rotor and the mass of permanent magnets, very little stalling torque and high thermal transmittance between the stator windings and the housing. At the same time, it enables the assembly of statues from individual stator poles.

There are many known solutions to the problem. The highest torque-to-mass ratios of magnets can be achieved in structures where the poli stator contains magnetically permeable cores. These structures achieve significantly higher ratios than those with non-permeable core poly, which do not have stall torque problems. Therefore, most known solutions are concerned with how to reduce the congestion torque of a structure containing magnetically permeable cores of the stator poles. Most of them are based on the difference in the number of rotor poles and statog poles.

According to patent JP 10234144, the problem is solved by a three-phase construction, in which the rotor has ten alternately magnetized poles, and the stator consists of three groups of three active poles of each phase and two smaller blind poles without winding on both edges of the groups. The disadvantage of this solution is that at higher torques a large flashing force per rotor occurs.

According to JP 2003088011, the problem is solved by a three-phase structure consisting of a stator with a whole multiple of twelve irregularly spaced poles divided into six groups of two opposite winding poles of the same phase and a rotor with the same multiple of fourteen alternately magnetized poles. At the perimeter of the magnetic gap, the adjacent poles of the statue pass into each other, further reducing the stalling torque, but at the expense of reducing the torque due to the partial termination of the magnetic flux through the connection between adjacent poles. It is also embarrassing that in statues with more than twelve poles, only groups of two halves of the same phase are exchanged, since one third of the pole of the rotoi is sacrificed for each group.

According to the patents US 2002047432, US 2002074887 and the like, with different numbers of rotor and stator poles, the reduction of the stalling torque is achieved by the uneven distribution of rotor poles, with an even distribution of stator poles.

According to patent EP 0543625, the cores of the stator poles have a gap in the extended portion near the magnetic gap toward the void rotor. This reduces the congestion torque while also reducing the eddy currents in the expanded part of the half-core.

According to patent JP 11018326 and the like, the reduction of the deadlock torque is achieved by a recess at the front of the half-core, which passes into the magnetic slot towards the rotor. This also results in a slight decrease in the magnetic flux between the rotor and the stator poles at the same minimum width of the magnetic gap, which reduces the torque at the same flow through the stator windings.

Similar solutions are to US Patent No. 5523637 and the like, wherein the cores of the stator poles have several recesses arranged at the front. The number, size and arrangement of the wells depends on the geometry of the nuclei and the size of the gap between adjacent poles of the stator. This results in a reduction of the stalling torque, while also reducing the torque achievable at the same width of the magnetic gap between the rotor and the stator poles.

According to the patent JP 2003070189, the problem of reducing the congestion torque is solved so that the nuclei of adjacent stator poles overlap. As a result, the magnetic flux between adjacent stator poles is increased, resulting in a decrease in torque achievable.

According to patent JP 2003259573, the problem of contracting a magnetic flux between adjacent poles that reduces the torque attained is solved by using a form of half-core expansion. This is designed to narrow in the direction of adjacent poles, resulting in a decrease in the magnetic flux between adjacent poles. As a result, the torque at the same mass of magnets is slightly increased. However, this kind of kernel increases the deadlock torque.

According to the patent JP 2003153514, the problem is solved by means of branching half-cores and windings that share the branches of adjacent cores with one another. The main disadvantage of the solution is the rather complicated winding design. It is also disadvantageous that the branching structure of the second cores reduces the thermal transmittance between the windings and the housing.

According to US patent 5751089, the problem is solved by a two-phase construction with two statues and a rotoi, with alternating magnetized poly. The stator and rotor contain an equal number of evenly spaced poles, with the stator offset relative to each other by half the pole. The first winding has the first phase winding and the second phase the second. Both windings are wound so that the winding directions of the adjacent poles are reversed. Due to the two statues, the construction enables a great thermal transfer between the windings and the housing. The disadvantage of the solution is a rather large stalling torque, which can be slightly reduced by the shape of the second cores.

The same patent also describes a solution with an arbitrary number of phases, where, along the circumference of the two stators, groups of alternately oriented poles belong to each phase, the phases whose poles are opposite each other on the stators, electrically offset by 90 °. , and angularly offset by half a pole. The sets of poles of the individual phases are arranged so that the phase of the stator poles is aligned with the phase of the rotor poles. With more phases, such construction allows the reduction of the congestion torque due to several simultaneous different positions of the statue poles relative to the rotor poles. However, such a solution is impractical since the use of four and multiphase controllers is not widespread.

Known solutions with interlaced windings of individual phases have longer windings due to the winding mode compared to non-interlaced windings, which results in higher resistive losses and increase in mass for the same or similar other properties.

According to the invention, the problem is solved by a construction comprising a rotor with an even number of approximately uniformly spaced alternately oriented magnetic poles, preferably permanent magnets, and at least one stator containing an equal number of equally spaced poles of each of at least two electrical phases arranged in a string groups at the boundaries between which the electrical phase of the statue is aligned with the magnetic phase of the rotor. The windings of the poles of each group of stator poles belong to the same electrical phase, the windings of adjacent poles within the group being wound in opposite directions. The construction will be described in more detail with the help of examples and figures showing FIG. 1 is a three-phase example with a statue having 24 poles and an internal rotor with 22 magnets. 2 shows differently shaped cores of the stator poles having more poles than the rotor of FIG. 3 is a three-phase example with a stator having 24 poles and an external rotor with 22 magnets. FIG. 4 is a three-phase example with two 24-pole stators and a 22-magnet rotor; 5 is a two-phase example with two 24-pole stators and a 26-magnet rotor; 6 shows differently shaped cores of the stator poles having fewer poles than the rotor of FIG. 7 is a three-phase example with two stators having 24 unevenly spaced poles and a 26 magnet magnet rotor; FIG. 8a is a simple transition of the stator between the pole sections of FIG. 8b is the passage of the stator between sections with an intermediate blind pole. 8c is the passage of the stator between sections with one asymmetric edge pole; FIG. 8d is the passage of the stator between sections with both asymmetric edge poles; FIG. 9a is a method of assembling the stator from the individual poles of FIG. 9b single pole components and compound pole, coiled

The synchronous electromechanical converter, hereinafter referred to as the motor, may act as an engine or generator. The engine preferably uses electrical multiphase systems where the phase difference between adjacent pseudophases is equal to 180 ° divided by the number of phases, including a three-phase 120 ° phase shifted system and a two-phase 90 ° phase shifted system. The magnetic circuit of the motor consists of a rotor 1 and at least one stator 2, the rotor being arranged so that it can rotate relative to the stator. Each stator is directly or indirectly connected to the housing 3, or a component thereof.

The rotor contains an even number M = 2m of approximately uniformly spaced alternately oriented magnetic poles 4, preferably permanent magnets, oriented approximately parallel to the direction perpendicular to the surface adjacent to the magnetic slot with the stator. For single-stator structures, the rotor also includes one or more magnetically permeable components 5 through which the magnetic flux between the individual poles is contracted on the side of the poles not adjacent to the magnetic slot with the statue. For structures with two statues, the rotor, with the possible exception of poles, preferably does not contain magnetically permeable and electrically conductive parts. In the case of permanent magnet rotors, the magnets are preferably rectangular in shape, but may also be segmented or made in one or more multipolar magnetized pieces.

Each stator consists of poles 6 that are directed toward the rotor and one or more magnetically permeable parts 7 through which the magnetic flux between the individual poles is contracted on the side adjacent to the magnetic slot with the rotor. The stator poles of the rotoi poles are separated by a magnetic gap, which is narrow compared to the distance between the centers of the two adjacent rotor poles and is approximately the same for all poles. Each pole of the stator contains a magnetic permeable core 8 and a winding 9. The cores of the poles typically extend in the vicinity of the magnetic slot in at least one direction approximately perpendicular to the magnetic field direction in the slot, preferably in a direction parallel to the direction of motion of the rotoi. This results in an increase in magnetic flux through the core of the pole, a better utilization of the core material and windings, while reducing the demagnetizing load and oscillation of the rotor pole field. The expanded core of the pole consists of a head 10 and a stem 11 around which is usually wound a winding pole. The core heads of adjacent poles are not normally contacted, but are preferably separated by a gap comparable to the width of the magnetic gap between the stator poles and the rotor poles.

The stator contains the same number of equally spaced poles of each individual electrical phase. The number of poles of each phase N is preferably an even number, allowing such an arrangement of the individual poles to minimize the total force per rotor. The total number of poles of all phases is at least two different from the number of rotor poles, which causes a discrepancy between the phases of the rotor and stator poles. The stator poles are therefore grouped together, within which the difference between the gain of the rotor magnetic phase and the statue electrical phase between the two adjacent poles is small, and the total discrepancy between the magnetic and electrical phases in the group area is smaller than the phase difference between the two electrical pseudophases. The windings of the poles of each group belong to the same pseudophase, and due to the alternately oriented magnetic rotor poles, the windings of the adjacent poles in the group are wound in opposite directions. At the boundaries between adjacent groups, the electrical phase of the stator poles is aligned with the magnetic phase of the rotor poles. Because of this, the windings of the poles of adjacent groups belong to different pseudophases, and part of the phase difference can also be adjusted by the distance between adjacent groups.

The number of groups is an even multiple of 2r the number of electrical phases F, which allows for such an arrangement that the total force per rotor is minimal. It is especially advantageous when the total number of poles of all phases is divisible by the number of groups, since the statue structure is in such cases most symmetrical. Preferably, the number of groups is as low as possible, which ensures greater utilization of the rotor poles, but with a larger number of groups it is possible to reduce or evenly distribute the mechanical loads of the rotor and to increase the frequency of mechanical excitations of the rotor. The total phase difference between the magnetic and electric phases in the region of the group of stator poles, which counts P poles, is equal to Z> = P (A // (F / V) -l) * 180 ^o . Therefore, when switching to an adjacent group of stator poles, the electrical phase must change by Eh-P * 180 °, plus any possible change due to the distance to the next group. The windings of the poles of the neighboring group belong to the pseudophase that best satisfies this condition. The preferred number of poles in each stator group is determined such that the absolute value of the total phase difference between the magnetic and electrical phases in the group region is approximately equal to the phase difference between the pseudophases.

Due to the small average phase difference between the magnetic phase of the rotor poles and the electric phase of the stator poles, especially for statues with a large number of poles, the utilization of the rotoi magnetic poles is very high. Because of this, the construction enables very high torque to mass ratios of permanent magnets. Optimal utilization of rotor magnetic poles is usually achieved when they account for between seventy and fifty-eighty percent of the volume of the rotor surface adjacent to the magnetic slot with stator poles, which also depends on the shape of the stator core cores.

The best use of magnets can be achieved with two statues standing opposite the rotor on either side of the rotor magnetic poles. Preferably, the statues have the same number and arrangement of poles. Statios are usually displaced from each other approximately by an even number of rotor poles, the priority value being equal to the closest even quotient between the number of rotor poles and twice the number of groups of stator poles whose windings belong to the same electrical phase A // (4r). In this case, the rotor poles are at least magnetically loaded, since at least two stator poles belonging to different phases are located on opposite sides of the same pole on opposite sides of the same pole. At the same time, the magnetization load overcome by the individual pole of the rotoi changes the least when rotating.

The two-stator construction also makes it possible to significantly improve the thermal transmittance between the windings and the housing, in comparison with structures of similar capabilities containing only one stator. This is especially important for heavily laden, cooled motoes. Increasing the temperature in the motor has a negative effect on the engine's properties, since the rotors usually contain permanent magnets, whose magnetic properties weaken as the temperature rises, while increasing the resistance of the winding statues and consequently the resistive losses.

As the windings of the individual phases are not intertwined, the stators can be composed of elements containing one or more poles or cores and windings of poles. The advantage of this method is that the stator windings can be wound before the elements are assembled. After the individual statue elements are installed, their windings are only electrically connected. This is especially advantageous when the stator is made up of individual poles whose windings are pre-wound on simple spindle winding machines, which makes it possible to achieve the highest fill values for windings in such statues.

Due to the difference in the number of rotor and stator poles and the arrangement of the stator poles, the construction has several variants. According to the first variant, the number of rotoi poles equals the closest even number that is less than or equal to the difference between the total number of stator poles of all electrical phases and the number of groups of stator poles whose windings belong to the same electrical phase of each stator (Af = 2w; m = down rounded (FA72-r); preferably r = 1). In this embodiment, the stator poles are approximately evenly spaced and preferably have the same core shape. This arrangement provides very low stalling torque, especially for statue motors having groups with an average of six or more stator poles, where even with simply formed heads of the half-cores, it does not exceed several thousandths of maximum engine torque. Usually, as the average number of poles of the stator group increases, the deadlock torque decreases. The uneven torque of the sinusoidal current of the individual electrical phases is very small and usually reaches up to a few percent. The cores of the stator poles belonging to each stator group may be designed to further reduce the difference between the magnetic phase of the rotor poles and the electrical phase of the stator poles. This can be achieved by making the heads of the core poles closer to the edges of the group more asymmetrical and offset by more than 12 toward the edge of the group relative to the core stem. This increases the efficiency of the rotor poles, but can also increase the stalling torque.

Alternatively, the number of rotoi poles equals the closest even number greater than or equal to the sum of the total number of stator poles of all electrical phases and the number of groups of stator poles whose windings belong to the same electrical phase of each stator (Af = 2w; zzz-up rounded ( FV / 2 + r); preferably r = l). In this embodiment, the stator poles are approximately evenly spaced and preferably have the same core shape. The magnitude and nature of the stalled torque is similar to that of the first variant, which also applies to the uneven torque in the sinusoidal flow of the individual electrical phases. The cores of the stator poles belonging to each stator group may be designed to further reduce the difference between the magnetic phase of the rotor poles and the electrical phase of the stator poles. This can be achieved by making the heads of the core poles closer to the edges of the group more asymmetrical and offset by more than 12 towards the center of the group relative to the core of the nucleus. This increases the efficiency of the rotor poles, but can also increase the stalling torque.

According to the third variant, the number of poles of the rotoi and the statue is the same as in the second variant. The statue poles are unevenly distributed, and within each group of stator poles they are arranged such that the spacing between them is approximately equal to the spacing between the rotor poles. The distance between adjacent edge sections 14, 15 of the sections is greater than that between the sections of each section. Transition between adjacent sections may also be carried out in such a way that there is a blank pole 16 between the edge poles of the two sections, made of magnetically permeable material which has no winding. This increases the area of the magnetic gap, which results in a smaller oscillation of the magnetic pole field of the rotoi as it crosses the sections. The same can be achieved by changing the shape of the core head of one or both edge poles. In this case, the part of the head closest to the pole of the adjacent section is usually stretched in the direction of the adjacent section. Since, in the third variant, the average difference between the magnetic phase of the rotor poles and the electric phase of the stator poles may be the smallest, it can achieve maximum torques, but it also has the greatest torque congestion and uneven torque among all variants. By appropriately arranging the statue poles and choosing the shape of the heads of their cores, the stalling torque can also be reduced in this variant to be comparable to the stalling torque of the other variants. The deadlock torque can also be reduced by the appropriate position or shape of the magnetic rotor poles, and for structures with two stators, the corresponding angular offset between them can be selected accordingly.

All variants can be made in one or two statues, but it is also possible that the stator motor contains different variants. The rotor poles can be oriented radially with respect to the axis of rotation of the rotor (radial construction) or parallel to the axis of rotation of the rotor (axial construction). In the case of single-stator radial construction, an external or internal rotor may be used. Obviously, linear construction of all three variants, with one or more stators, is also possible.

In a single stato radial construction, the rotor 1 typically consists of a magnetically highly permeable yoke 5 in the form of a ring and permanent magnets 4, which are attached to one of the yoke circumference, preferably by gluing or by means of mechanical fasteners. In the construction with an internal rotor, the yoke may also have the shape of a cylinder. In the case of a radial structure with two statues, the rotor usually has the form of a thin ring and preferably consists of permanent magnets which are interconnected with elements 17 of magnetically non-permeable and electrically non-conductive material, preferably polymers via non-adjacent magnetic slots with statues. or ceramics. Such a rotor may also be constructed in such a way that the magnets are arranged and sealed with bonding material, and it is customary to also fill the elements to connect the rotoi to the moto shaft at the same time. In cases where high stiffness of the rotor is important for the two-stator construction, the rotor may consist of a magnetically permeable yoke in the form of a ring and permanent magnets attached to both yoke circumference, preferably such that the magnets at the inner and outer circumference are approximately aligned and equally oriented.

In a single stator axial construction, the rotor typically consists of a magnetically high-foam disc-shaped yoke and permanent magnets, which are attached to one of its flat surfaces at the circumference of the yoke, preferably by gluing or by means of mechanical fasteners. In the case of an axial construction with two statues, the rotor usually has the form of a thin disk and preferably consists of permanent magnets which are interconnected by elements of magnetically non-permeable and electrically non-conductive material, preferably polymers, or via non-adjacent magnetic slots with statues. ceramics. Such a rotor may also be constructed in such a way that the magnets are arranged and sealed with binding material, and it is customary to simultaneously fill the elements for connecting the rotor to the motor shaft. In cases where a high stiffness of the rotor is important in the construction of two statues, the rotor may consist of a magnetically permeable yoke in the form of a disk and permanent magnets, which are attached at the circumference to both straight yoke surfaces, preferably such that the magnets of both surfaces are approximately aligned and equally oriented.

The magnetic flux between adjacent poles of the stator is usually contracted via a magnetically permeable yoke connecting the nuclei of adjacent poles. The stems of the core poles may pass into the yoke or be separated from it by a thin electrically conductive layer. The magnetically permeable parts of the stator are typically made of magnetically high permeable sheet metal.

The yoke and the cores of the poles can be made in one piece, which in the radial construction is usually made up of lamellae elements, and in the axial one it is usually made by punching the ribbon, which curves around the mandrel. In both cases, the disadvantage is that it is difficult to obtain high fill values for the winding poles during manufacture.

One way to make a stator is also to make the yokes and cores of the poles separately. In this case, the yoke is usually made by winding the belt onto a mandrel, and in the case of radial construction, the belt is bent in such a way that all the threads rest against the circumference of the mandrel. The cores of the poles are usually made of lamellae of the same shape. When assembling the stator, the cores of the cores are first wound on the coil, which is usually wound on the coil, and then the cores of the poles are electrically isolated by means of mechanical fasteners or adhesive so that the cores of the poles and the yoke are electrically isolated. This method of producing the statue can achieve high fill values for the windings of the poles, but the disadvantage is that the insulation layer reduces the thermal conductivity between the cores of the poles and the yoke, while also creating an additional magnetic gap between the poles and the yoke. An additional disadvantage is that the manufacturing method is unsuitable for the manufacture of thin yokes, which are commonly used in motoes with a large number of poles.

Preferably, the stator is made of poles having cores 8 formed to contain a portion of the yoke, which causes the magnetic flux to contract directly between the nuclei of adjacent poles. The cores are designed so that the surface of the slot 19 through which the field passes from one pole to the other is as large as possible and is usually made of lamellae of the same shape. The individual pole is assembled by affixing two, preferably identical, parts 20 to the core of the core, which form a coil, to which the winding of the pole 9 is then wound. The stator is usually assembled by attaching the poles to the housing of the motor 3, preferably by gluing or using mechanical fasteners. If the part of the housing to which the poles are attached is electrically conductive, the poles of the statue must be electrically insulated. In the case of poles which are glued to the housing, the adhesive layer 18 between the core of the pole and the housing and in the gap 19 between adjacent poles also serves as an electrical insulator. Because of the simple winding design, the windings of the poles made in this way are of high filling value. Since the magnetic resistances of the slots between adjacent poles are usually at least one class smaller than the resistances of the magnetic gap between the poles of the statue and the rotor, they do not significantly reduce the magnetic flux through the stator poles. The statues made in this way allow for good heat dissipation to the housing, and the additional advantage is that they limit the formation of mechanical stresses in the statue and the housing, which are due to the different temperatures and temperature elongations of the materials from which the individual elements are made.

In the case of a two-stator radial construction, the stems of the pole cores in the inner statue are usually longer than in the outer stator, so that the windings of the poles of both statues have approximately the same electrical and magnetic properties.

Claims (17)

PATENT APPLICATIONS A synchronous electromechanical transducer, characterized in that it contains at least one stator and a rotor, arranged so that it can rotate or move relative to the stator; that the rotor contains an even number of approximately uniformly spaced alternately oriented magnetic poles oriented approximately parallel to the direction perpendicular to the surface adjacent to the magnetic slot with the statue; that the stator consists of an anticlockwise directional pole containing cores of magnetically permeable material and one or more magnetically permeable portions through which the magnetic flux between the individual poles of the stator is contracted on the side not adjacent to the magnetic slot with the rotor; that the stator pole is separated from the rotator poles by a magnetic gap which is narrow compared to the distance between the centers of the two adjacent rotor poles and is approximately the same for all poles; that the stator contains an equal number of equally spaced poles of each of the at least two electrical phases, which are arranged in clustered groups, at the boundaries between which the electrical phase of the statog is aligned with the magnetic phase of the rotog; that the windings of the poles of each group of stator poles belong to the same electrical phase, the windings of adjacent poles within the group being wound in opposite directions; gives the number of groups of stator poles whose windings belong to the same electrical phase an even number. Synchronous electromechanical converter according to claim 1, characterized in that the cores of the stat poles near the magnetic slot with the rotor extend in at least one direction approximately perpendicular to the direction of the magnetic field in the slot, preferably in a direction parallel to the rotor motion of the rotor . Synchronous electromechanical converter according to claim 1 or 2, characterized in that the rotor contains permanent magnets as a pole; that the magnets preferably occupy from seventy to fifty-eighty percent of the size of the rotoglot surface adjacent to the magnetic slot with a single statue. Synchronous electromechanical converter according to claim 1 or 2 or 3, characterized in that the number of rotation poles is equal to the nearest even number, which is less than or equal to the difference between the total number of stator poles of all electrical phases and the number of groups of stator poles whose windings belong to the same electrical phase. Synchronous electromechanical converter according to claim 1 or 2 or 3, characterized in that the number of rotor poles is equal to the nearest even number, which is greater than or equal to the sum of the total number of stator poles of all electrical phases and the number of groups of stator poles whose windings belong to the same electrical phase . Synchronous electromechanical converter according to claim 4 or 5, characterized in that the poles of the stator are approximately evenly spaced and that the cores of the stato poles are of the same shape. Synchronous electromechanical converter according to claim 4 or 5, characterized in that the pole statues are approximately uniformly distributed and that the shape of the core poles within each group of poles is varied so as to reduce the difference between the magnetic phase of the rotor poles and the electrical phase of the stator poles. group area. Synchronous electromechanical transducer according to claim 5, characterized in that the staty poles are spaced unevenly, with sections within each group spaced at approximately equal spacing between adjacent rotor poles. Synchronous electromechanical converter according to claim 8, characterized in that the cores of the stator poles containing the windings are of the same shape, and between the individual sections of the winding poles there are poles of magnetically permeable material that do not contain windings. Synchronous electromechanical converter according to claim 8, characterized in that the stator poles at the transitions between adjacent sections of the core poles are designed to increase the area of the magnetic gap with the rotor. Synchronous electromechanical converter according to claim 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that the rotor poles are oriented radially with respect to the axis of rotation of the rotor. Synchronous electromechanical converter according to claim 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that the rotor poles are oriented parallel to the axis of rotation of the rotor. Synchronous electromechanical converter according to claim 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that it has the form of a linear moto. Synchronous electromechanical converter according to claim 11 or 12 or 13, characterized in that it contains two stators located on opposite sides of the rotor poles. Synchronous electromechanical transducer according to claim 14, characterized in that the stator opposite one another is displaced approximately by an even number of rotor poles, the priority value being equal to the closest even quotient number between the number of rotor poles and twice the number of groups of stator poles whose windings belong to the same electrical phase. Synchronous electromechanical converter according to claim 14 or 15, characterized in that the rotor, with the exception of poles, does not contain magnetically permeable and electrically conductive parts. Synchronous electromechanical converter according to claim 11 or 12 or 13 or 14 or 15 or 16, characterized in that at least one of the stators consists of poles having nuclei formed in such a way that magnetic flux is contracted directly between the nuclei of adjacent poles.