Motor

Abstract

Engine (50; 54; 55; 56), comprising: a field (2); and a runner (1) which is facing the field (2) and is arranged to be movable relative to the field (2), wherein the rotor (1) comprises a core back (11), several teeth (12) and several coils (13), wherein the several teeth (12) each extend from the core back (11) to the field (2) and are arranged in a direction of travel of the rotor (1) with respect to the field (2), wherein the several coils (13) are attached to the several teeth (12), wherein the multiple teeth (12) comprise at least one first tooth and at least one second tooth, wherein each of the at least one first tooth is a tooth to which only one coil of a single phase of the coils (13) is attached, wherein each of the at least one second tooth is a tooth to which coils of multiple phases of the coils (13) are attached, wherein the multiple coils (13) are each arranged such that they do not extend beyond a slot formed by adjacent teeth, wherein C sections (10) are arranged in the direction of travel, wherein the section (10) comprises N / C teeth (12), where N is the number of teeth (12) of the runner (1), wherein C is a greatest common divisor of N and the number of magnetic poles of the field (2), the magnetic poles being located in a region facing the N teeth (12), and where the number of second teeth per section of the C sections (10) is one.

Description

Area

[0001] The present disclosure relates to a motor with teeth and coils attached to the teeth. background

[0002] A conventional motor is known which can reduce cogging torque by setting N / C = P / C ± 1 and by setting N / C to an integer other than a multiple of 3, where P is the number of magnetic poles of the rotor, N is the number of teeth of the stator, and C is the greatest common divisor of P and N. With respect to such a motor, patent literature 1 discloses that torque ripple can be reduced by configuring the number of windings on a tooth to which a coil of only one of the three phases is attached such that it differs from the sum of the number of windings of the respective phases on each tooth to which coils of several of the three phases are attached. The motor described in patent literature 1 comprises a first tooth to which only a coil of a single phase is attached and second teeth to which coils of several phases are attached.

[0003] Patent literature 2 and patent literature 3 each disclose a variety of different electric motors with a field pole unit and an armature. The armature comprises a variety of successive teeth, some with single-phase coil configurations and some with multi-phase coil configurations. List of patent literature Patent literature 1: WO 2019 / 008 848 A1 Patent literature 2: DE 10 2007 007 578 A1 Patent literature 3: KR ​​10 2020 0 010 493 A Brief description: Technical problem

[0004] According to the technology described in patent literature 1, the stator comprises two or more second teeth, and a first tooth is positioned between one of the second teeth and another of the second teeth. A higher number of second teeth, i.e., a higher number of coils, causes the generated magnetic fluxes to have more distributed phases, resulting in a lower distributed winding coefficient. Positioning a first tooth between one of the second teeth and another of the second teeth increases the phase difference between the magnetic fluxes generated by the coils, leading to a lower distributed winding coefficient. A lower distributed winding coefficient causes the coils to generate more heat. This presents a problem in that the technology described in patent literature 1 causes the coils to generate a large amount of heat.

[0005] The present disclosure was made in consideration of the foregoing, and it is an objective of the present disclosure to provide a motor which can reduce heat generation from coils. Solution to the problem

[0006] The technical problem is solved by the invention according to the subject matter of the independent claims. Advantageous embodiments of the invention are defined in the dependent claims. Advantageous effects of the invention

[0007] A motor according to the present disclosure provides an advantage in that it can reduce heat generation from coils. Brief description of drawings Fig. Figure 1 is a schematic diagram showing a schematic configuration of a motor system, which shows a motor according to a first embodiment. Fig. Figure 2 is a cross-sectional view of the motor according to the first embodiment. Fig. Figure 3 is a diagram showing an example of the number of windings of the respective coils attached to the teeth in the first embodiment. Fig. Figure 4 is a cross-sectional view of a motor according to a comparison example with the first embodiment. Fig. Figure 5 is a diagram showing an example of the number of windings of the respective coils attached to the teeth in the comparison example compared to the first embodiment. Fig. Figure 6 is a vector diagram showing induced voltages in the respective coils of the motor according to the first embodiment. Fig. Figure 7 is a vector diagram showing induced voltages in the respective coils of the motor according to the comparative example compared to the first embodiment. Fig. Figure 8 is a diagram to describe an increase in the distributed winding coefficient in the motor according to the first embodiment. Fig. Figure 9 is a diagram to describe a decrease in mutual inductance provided by the motor according to the first embodiment. Fig. Figure 10 is a cross-sectional view of a motor according to a second embodiment. Fig. Figure 11 is a diagram showing an example of the number of windings of the respective coils attached to the teeth in the second embodiment. Fig. Figure 12 is a cross-sectional view of a motor according to a comparison example with the second embodiment. Fig. Figure 13 is a diagram showing an example of the number of windings of the respective coils attached to the teeth in the comparative example compared to the second embodiment. Fig. Figure 14 is a vector diagram showing induced voltages in the respective coils of the motor according to the second embodiment. Fig. Figure 15 is a vector diagram showing induced voltages in the respective coils of the motor according to the comparative example compared to the second embodiment. Fig. Figure 16 is a diagram to describe an increase in the distributed winding coefficient in the motor according to the second embodiment. Fig. Figure 17 is a cross-sectional view of a motor according to a third embodiment. Fig. Figure 18 is a cross-sectional view of a motor according to a fourth embodiment. Fig. Figure 19 is a diagram showing an example of the number of windings of the respective coils attached to the teeth in the fourth embodiment. Fig. Figure 20 is a diagram to describe an increase in the distributed winding coefficient in the motor according to the fourth embodiment. Fig. Figure 21 is a cross-sectional view of a motor according to a fifth embodiment. Description of embodiments

[0008] An engine according to the embodiments is described in detail below with reference to the drawings. First embodiment.

[0009] Fig. Figure 1 is a schematic diagram showing a schematic configuration of a motor system 100, which includes a motor 50 according to a first embodiment. The motor system 100 comprises the motor 50, a guide 60, which is a straight-extending support, and a slider 70, which is movable along the guide 60.

[0010] The motor 50 comprises a movable element 1 and a stator 2. The movable element 1 faces the stator 2. The stator 2 is a field. The movable element 1 is a rotor for generating thrust by interacting with the field. The movable element 1 faces the stator 2 with a gap provided between them. The movable element 1 is attached to the slider 70. The movable element 1 moves with the slider 70 along the guide 60 by means of thrust generated by the interaction between the movable element 1 and the stator 2. The movable element 1 is movable in a straight line with respect to the stator 2. That is, the movable element 1 is movable relative to the stator 2. The motor 50 is a linear motion motor for moving the movable element 1 in a straight line. The double arrow that appears in Fig. The figure shown indicates the direction of movement of the movable element 1, i.e., the direction of travel of the movable element 1.

[0011] The stator 2 comprises a stator iron core with a mounting location 22 and several permanent magnets 21, which are provided on a surface of the mounting location 22. A representation of the stator iron core is omitted. The permanent magnets 21 are mounted on the mounting location 22, which is provided on a surface of the stator iron core. The multiple permanent magnets 21 are arranged in the direction of rotation of the moving element 1.

[0012] Fig. Figure 2 is a cross-sectional view of the motor 50 according to the first embodiment. The one in Fig. The cross-section shown in Figure 2 is a cross-section that includes the direction of travel of the movable element 1 and the direction in which the movable element 1 faces the stator 2. ... Fig. The cross-section of stator 2 shown is a cross-section of a section of stator 2 facing the movable element 1.

[0013] The movable element 1 comprises a movable element iron core and several coils 13 attached to the movable element iron core. The movable element iron core includes a core back section 11 extending in the direction of travel of the movable element 1 and several teeth 12 extending from the core back section 11 towards the stator 2. In the first embodiment, the movable element 1 comprises five teeth 12. The five teeth 12 are arranged in the direction of travel of the movable element 1. Each tooth 12 has a straight front end section on the side closer to the field. The coils 13 are each provided in a slot, which is a section located next to the tooth 12 in the direction of travel of the movable element 1. The adjacent teeth 12 form a slot between them. The coils 13 are each configured such that a conductor cable is wound tightly around one of the teeth 12.This means that each of the multiple coils 13 in the movable element 1 is arranged in such a way that it does not extend beyond one slot.

[0014] In the first embodiment, four of the multiple permanent magnets 21, which are arranged in the direction of travel of the movable element 1, face the five teeth 12. This means that the number of magnetic poles provided in a region facing the five teeth 12 in the direction of travel of the movable element 1 is four.

[0015] A voltage from a three-phase alternating current (AC) power supply is applied to the movable element 1. A representation of the three-phase AC power source is omitted. N denotes the number of teeth 12 of the movable element 1, and C denotes the greatest common divisor of N, which is the number of teeth 12, and the number of magnetic poles provided in a region facing the N teeth 12. The term "number of magnetic poles" hereafter refers to the number of magnetic poles provided in a region facing the N teeth 12. In the first embodiment, the number of magnetic poles is assumed to be 4, N = 5, and C = 1. In the first embodiment, N / C is 5 and is therefore an integer other than a multiple of 3. N is an integer other than a multiple of 3.If such conditions are met, the motor 50 is advantageous in that it can reduce the cogging torque.

[0016] In the first embodiment, each of the teeth 12 of the movable element 1 is assigned a tooth number for illustrative purposes. The teeth 12 are numbered t1, t2, t3, t4 and t5 from left to right in Fig. 2 assigned.

[0017] Coils 13 of three phases are attached to the five teeth 12. A coil 13 with phase -U is attached to tooth 12 numbered t1. A coil 13 with phase -V is attached to tooth 12 numbered t2. A coil 13 with phase +V and a coil 13 with phase -W are attached to tooth 12 numbered t3. A coil 13 with phase +W is attached to tooth 12 numbered t4. A coil 13 with phase +U is attached to tooth 12 numbered t5. The signs "+" and "-" indicate the winding direction of the respective coils 13. It should be noted that the in Fig. The two symbols shown, U-, V-, V+, W-, W+ and U+, represent a phase -U, a phase -V, a phase +V, a phase -W, a phase +W and a phase +U respectively.

[0018] The teeth 12 numbered t1, t2, t4, and t5 are each teeth to which only one coil 13 of a single phase is attached. The tooth 12 numbered t3 is a tooth 12 to which coils 13 of two phases are attached. Therefore, the multiple teeth 12 of the movable element 1 comprise first teeth, each of which is a tooth 12 to which only one coil 13 of a single phase is attached, and a second tooth, which is a tooth 12 to which coils 13 of multiple phases are attached. The teeth 12 numbered t1, t2, t4, and t5 are the first teeth. The tooth 12 numbered t3 is the second tooth. The tooth 12 numbered t1 and the tooth 12 numbered t5, each of which is a tooth 12 positioned at one end in the direction of travel of the movable element 1, are first teeth.

[0019] In the motor 50, C sections 10 are arranged in the direction of rotation, each section 10 comprising teeth 12. In the first embodiment, a single section 10 comprising five teeth 12 is arranged in the direction of rotation. In addition, in the first embodiment, the section 10 comprises a single second tooth.

[0020] Fig. Figure 3 is a diagram showing an example of the number of windings of the respective coils 13 attached to the teeth 12 in the first embodiment. Fig. Figure 3 shows the number of turns of the coil 13 in each phase at each of the teeth 12 and the total number of turns at each of the teeth 12. The in Fig. The three numbers of windings shown are each the number of windings normalized to the number of windings on all 12 teeth. The in Fig. The three total numbers of windings shown are each the total number of windings normalized to the number of windings of all teeth 12. This means that the number(s) of windings and the total number of windings at each of the teeth 12 are each represented by a ratio based on the number of windings in the entire movable element 1. Fig. Figure 3 also shows the ratio of the number of series conductors in each phase to the number of series conductors in the entire movable element 1.

[0021] As in Fig. As shown in Figure 3, the total number of turns on tooth 12 numbered t3 is 0.12. Tooth 12 numbered t2 and tooth 12 numbered t4 are each first teeth adjacent to the second tooth. The total number of turns on each of teeth 12 numbered t2 and tooth 12 numbered t4, which is 0.27, is greater than the total number of turns on tooth 12 numbered t3, which is 0.12. Therefore, in section 10 of the first embodiment, the total number of turns of coil 13 on each of the first teeth adjacent to the second tooth is greater than the total number of turns of coil 13 on the second tooth.

[0022] Furthermore, tooth 12 numbered t1 and tooth 12 numbered t5 are each first teeth located adjacent to the second tooth with a single first tooth between them. The total number of turns on tooth 12 numbered t1 and tooth 12 numbered t5, which is 0.17, is less than the total number of turns on tooth 12 numbered t2 and tooth 12 numbered t4, which is 0.27. Therefore, in section 10 of the first embodiment, the total number of turns of coil 13 on each of the first teeth located adjacent to the second tooth with a single first tooth between them is less than the total number of turns of coil 13 on each of the first teeth located adjacent to the second tooth.

[0023] A configuration of a motor according to a comparative example with respect to the first embodiment is now described. Fig. Figure 4 is a cross-sectional view of a motor 51 according to a comparison example with the first embodiment. Fig. Figure 5 is a diagram showing an example of the number of windings of the respective coils 13 attached to the teeth 12 in the comparative example compared to the first embodiment. As shown in Fig. The motor 50 shown comprises the movable element 1 with five teeth 12. A coil 13 with phase +U is attached to tooth 12 numbered t1. A coil 13 with phase +V and a coil 13 with phase -U are attached to tooth 12 numbered t2. A coil 13 with phase -V is attached to tooth 12 numbered t3. A coil 13 with phase +V and a coil 13 with phase -W are attached to tooth 12 numbered t4. A coil 13 with phase +W is attached to tooth 12 numbered t5.

[0024] Section 10 of motor 51 comprises two second teeth. In section 10 of motor 51, tooth 12 numbered t3, which is a first tooth, is positioned between tooth 12 numbered t2, which is a second tooth, and tooth 12 numbered t4, which is a second tooth. The number of coils 13 in section 10 of motor 51 is one greater than the number of coils 13 in section 10 of the [unclear text]. Fig. 2 Motor 50 shown. In addition, in section 10 of motor 51 there is no first tooth which lies next to the second tooth with a single first tooth in between.

[0025] Fig. Figure 6 is a vector diagram showing induced voltages in the respective coils 13 of the motor 50 according to the first embodiment. Fig. Figure 7 is a vector diagram showing the induced voltages in the respective coils 13 of the motor 51 according to the comparative example compared to the first embodiment. Fig. 6 and Fig. 7 represent vectors, depicted by arrows with solid lines, each representing the amplitude and phase of an induced voltage of the associated coil 13, which is arranged around the associated tooth 12. In the vector diagrams of the Fig. 6 and Fig. 7 It is assumed that a length which is twice the interval of the permanent magnets 21 is a phase angle of 360 degrees. A vector which represents the amplitude and the phase of an induced voltage at each of the coils 13 is hereafter referred to as an induced voltage vector. The vector “t1_U-”, which in Fig. Figure 6 shows the induced voltage vector of the coil 13 with phase -U, which is attached to the tooth 12 with number t1. Fig. 6 and Fig. Figure 7 shows the induced voltage vector of each coil 13 using the same notation as in “t1_U-”. Vectors represented by arrows with dashed lines are the induced voltage vectors of the respective phases and each is a result vector obtained by combining the induced voltage vectors of the respective assigned coils 13 of the assigned phase.

[0026] The phase difference between adjacent teeth 12 is given as {360 x (P / 2) / N} degrees, where P is the number of magnetic poles and N is the number of teeth 12. For example, in motor 50, tooth 12 numbered t1 and tooth 12 numbered t2 have a phase difference of 360° × (4 / 2) / 5 = 144°. The teeth 12 of motor 50 are arranged such that adjacent teeth 12 have a phase difference of 144 degrees. It should be noted that the phase of an induced voltage in a winding direction of "-" leads the phase of an induced voltage in a winding direction of "+" by 180 degrees.

[0027] Combining the induced voltage vectors of the respective assigned coils 13 for each phase yields the induced voltage vector for each phase. The distributed winding coefficient k d each phase, specified by k d,Phase , is defined by equation (1) below. Formula 1: kd,phase=∑i=1NCNphase,icos(θphase,i−θphase) / ∑i=1NCNphase,i

[0028] The value N C represents the total number of coils, 13, in each phase. The value N Phase,i (i = 1, ..., N C ) represents the number of windings in each of the 13 coils. The value θ Phase,i represents the phase of the induced voltage vector of each of the coils 13. The value θ Phase represents the phase of the resulting vector of each phase. The value θ Phase is defined by equation (2) below. Formula 2: θphase=tan−1(∑i=1NCNphase,isin θphase,i / ∑i=1NCNphase,icos θphase,i)

[0029] For example, the resulting vector for the phase U of motor 50 is a resultant vector obtained by combining the vectors “t1_U-” and “t5_U+”. Assuming that the phase of “t1_U+” is 0 degrees, the phase of “t1_U-” is given by θ. U,1, 180 degrees. The phase of “t5_U+”, specified by θ U,2 , is calculated as 144°×(5-1) = 576°. A conversion of such θ U,2 at an angle in the range of 0 degrees to 360 degrees, θ U,2 of 216 degrees. Taking into account that the number of turns of coil 13 of “t1_U-” and the number of turns of coil 13 of “t5_U+” are equal to each other, the phase of the resulting vector for the phase U, given by θ U , calculated as (θ U,1 +θ U,2 ) / 2=(180°+216°) / 2= 198°.

[0030] The distributed winding coefficient k d phase U, specified by k d,U , is calculated as expressed by equation (3) below, by assigning values ​​to the parameters of equation (1), where N U,1 the number of turns of coil 13 of “t1_U-”, which is a coil 13 that forms phase U, and N U,2is the number of windings of coil 13 of “t5_U+”, which is a coil 13 that forms the phase U. kd,U={NU,1×cos(180°−198°)+NU,2×cos(216°−198°)} / (NU,1+NU,2)

[0031] The distributed winding coefficient k d phase V, specified by k d,V , and the distributed winding coefficient k d the phase W, specified by k d,W , can each be obtained by a calculation that is similar to that of k d,U is the same. A value k d,UVW is calculated by equation (4) below, where k d,UVW the total value of the distributed winding coefficients k d specifies all phases, i.e., phase U, phase V and phase W. kd,UVW=(kd,U+kd,V+kd,W) / 3

[0032] Fig. Figure 8 is a diagram to describe an increase in the distributed winding coefficient in the motor 50 according to the first embodiment. Fig. Figure 8 shows a bar graph representing the value of a distributed winding coefficient of motor 51 according to the comparison example, and a bar graph representing the value of a distributed winding coefficient of motor 50 according to the first embodiment. The values ​​of the distributed winding coefficients are normalized to the value of the distributed winding coefficient of motor 51. This means that a value of a distributed winding coefficient is represented by a ratio based on the value of the distributed winding coefficient of motor 51.

[0033] At the in Fig. In the first embodiment shown in Figure 6, the motor 50 comprises two coils 13 with phase U, two coils 13 with phase V, and two coils 13 with phase W. In the embodiment shown in Figure 6, the motor 50 comprises two coils 13 with phase U, two coils 13 with phase V, and two coils 13 with phase W. Fig. In the comparative example shown in Figure 7, motor 51 comprises two coils 13 with phase U, three coils 13 with phase V, and two coils 13 with phase W. Motor 50 of the first embodiment comprises one fewer coil 13 than motor 51 of the comparative example, which means that motor 50 can achieve an amplitude equal to that of motor 51 with a smaller number of windings. Therefore, motor 50 of the first embodiment can increase the distributed winding coefficient relative to that of motor 51 in the comparative example.

[0034] The motor 50 uses the coil arrangement that is in Fig. 2 is shown, and the number of windings that are in Fig. Figure 3 shows that the motor 50 is advantageous in that it can provide a distributed winding coefficient that is greater than the distributed winding coefficient in the comparison example shown in Figure 3. Fig. 4 coil arrangement shown and the one in Fig. The 5 shown numbers of windings are used.

[0035] Motor 50 does not use a configuration in which a first tooth is positioned between two second teeth. The ability of motor 50 to provide a distributed winding coefficient higher than that in the comparison example allows for a reduction in the heat generation of the coils 13 in the moving element 1.

[0036] Adjusting the total number of windings on each of the teeth 12, as described above, allows the motor 50 to reduce differences in induced voltage and inductance between phases. The motor 50 can therefore be advantageous in that it can reduce the difference in the motor's connection voltage. Furthermore, the motor 50 can reduce the difference in the total number of windings between phases and thus reduce the difference in resistance. The motor 50 can therefore be advantageous in that it can reduce local heat generation in the coils 13.

[0037] Fig. Figure 9 is a diagram to describe a decrease in mutual inductance provided by the motor 50 according to the first embodiment. Fig. Figure 9 shows a bar graph representing the value of the mutual inductance of motor 51 according to the comparison example, and a bar graph representing the value of the mutual inductance of motor 50 according to the first embodiment. The mutual inductance values ​​are normalized to the mutual inductance of motor 51. That is, a mutual inductance value is represented by a ratio relative to the mutual inductance of motor 51. Motor 50 uses the value shown in Figure 9. Fig. 2 shown coil arrangement and the one in Fig. The number of windings shown in the 3. This makes the motor 50 advantageous in that it can provide a mutual inductance that is lower than the mutual inductance in the comparison example, which is shown in Fig. 4 coil arrangement shown and the one in Fig. The 5 shown numbers of windings are used.

[0038] It should be noted that the motor 50 is not limited to one having the number(s) of windings of the coil(s) 13 attached to each of the teeth 12, as in Fig. 3 are shown. It is sufficient that the number of windings on tooth 12, to which the coils 13 of two phases are attached, is not much greater than the number of windings on another tooth 12, and the combination of the numbers of windings on teeth 12 can be determined by the Fig. The combination shown in 3 may differ. Even if the combination of the number of windings on the teeth 12 differs from the one shown in Fig. Although the combination shown in Figure 3 differs, the motor 50 can also be advantageous in the same way as if the number of windings of the respective coils 13 were as shown in Figure 3. Fig. 3 are shown.

[0039] There is no restriction regarding the order of the arrangement of the coils 13 on the tooth 12, on which coils 13 of several phases are attached. The order of the arrangement of the coil 13 with phase +V and the coil 13 with phase -W on the tooth 12 with the number t3, which in Fig. As shown in 2, the opposite can be said of the one in Fig. The order shown in 2 is sufficient. It is also sufficient that the arrangement of the coils 13 over the multiple teeth 12 is the same as that shown in 2. Fig. 2 shown regarding the sequence of phases in the direction of travel of the moving element 1. Each phase can be positioned at one end in the direction of travel, as long as the in Fig. The sequence shown in point 2 is followed.

[0040] In the first embodiment, the movable element 1 is configured such that N = 5 and C = 1 are satisfied. That is, the movable element 1 is configured to comprise a single section 10 with five teeth 12, with such a section 10 arranged in the direction of travel. The motor 50 can comprise multiple sections 10 arranged in the direction of travel. That is, the movable element 1 can be configured to comprise multiple sections 10. In this case, C is a natural number greater than 1. Even if C is a natural number greater than 1, the motor 50 can still be advantageous in the same way as described above in the case where C equals 1.

[0041] In the first embodiment, the movable element 1 is configured to comprise a single section 10 or several sections 10 arranged in the direction of travel. Additionally, an auxiliary tooth, which is a tooth 12 without a coil 13 on it, can be provided at each of the two ends in the direction of travel of the movable element 1. Even if an auxiliary tooth is provided at each of the two ends in the direction of travel of the movable element 1, the motor 50 can still be advantageous in the same way as in the case where no auxiliary tooth is provided.

[0042] Each of the multiple teeth 12 is not limited to a tooth having a straight-shaped front end section on the side closer to the field. The front end section of each tooth 12 on the side closer to the field may have a projection or a depression formed such that it points in the direction of travel. Even if a projection or depression is formed on each of the teeth 12, the motor 50 may still be advantageous in a similar way to the case where the teeth 12 are straight.

[0043] The first embodiment was described in the context of a configuration in which the multiple permanent magnets 21 are mounted on a surface of the stator iron core at the mounting location 22. However, the motor 50 can also be configured in such a way that the multiple permanent magnets 21 are embedded in the stator iron core. Even when the multiple permanent magnets 21 are embedded in the stator iron core, the motor 50 can still be advantageous in the same way as when the multiple permanent magnets 21 are provided on a surface of the stator iron core.

[0044] According to the first embodiment, the motor 50C comprises sections 10 arranged in the direction of rotation, each comprising N / C teeth 12, and each section 10 comprising a single second tooth. The ability of the motor 50 to provide a higher distributed winding coefficient enables a reduction in the heat generation of the coils 13 in the moving element 1. Therefore, the motor 50 provides an advantage in that it can reduce heat generation of the coils 13. Second embodiment.

[0045] Fig. Figure 10 is a cross-sectional view of a motor 52 according to a second embodiment. In the second embodiment, the teeth 12 and the coils 13 in the moving element 1 are arranged differently compared to those in the first embodiment. In the second embodiment, components that are identical to the components of the first embodiment described above are designated by the same reference numerals, and the main focus is on describing the part of the configuration that differs from the first embodiment. (Same as in the case of...) Fig. 2 is the cross-section of the in Fig. Stator 2 shown in 10 is a cross-section of a section of stator 2 facing the movable element 1.

[0046] In the second embodiment, the number of magnetic poles is 3, N = 4, and C = 1. In this second embodiment, N / C is four and is therefore an integer other than a multiple of 3. N is also an integer other than a multiple of 3. When such conditions are met, the motor 52 is advantageous in that it can reduce cogging torque.

[0047] In the second embodiment, each of the teeth 12 of the movable element 1 is assigned a tooth number for illustrative purposes. The teeth 12 are numbered t1, t2, t3 and t4 from left to right in Fig. 10 assigned.

[0048] Thirteen coils for three phases are attached to the four teeth 12. A coil 13 with phase +U is attached to tooth 12 numbered t1. A coil 13 with phase +V and a coil 13 with phase -U are attached to tooth 12 numbered t2. A coil 13 with phase -V and a coil 13 with phase +W are attached to tooth 12 numbered t3. A coil 13 with phase -W is attached to tooth 12 numbered t4.

[0049] Teeth 12 numbered t1 and t4 are each teeth 12 to which only one coil 13 of a single phase is attached. Teeth 12 numbered t2 and t3 are each teeth 12 to which coils 13 of two phases are attached. Therefore, the multiple teeth 12 of the movable element 1 comprise first teeth, each of which is a tooth 12 to which only one coil 13 of a single phase is attached, and second teeth, each of which is a tooth 12 to which coils 13 of multiple phases are attached. Teeth 12 numbered t1 and t4 are the first teeth. Teeth 12 numbered t2 and t3 are the second teeth. The tooth 12 numbered t1 and the tooth 12 numbered t4, each of which is a tooth 12 positioned at one end in the direction of travel of the movable element 1, are first teeth.

[0050] In the motor 52, C sections 10 are arranged in the direction of rotation, each section 10 comprising N / C teeth 12. In the second embodiment, a single section 10 with four teeth 12 is arranged in the direction of rotation. Furthermore, in the second embodiment, the section 10 comprises two second teeth. In the section 10, the two second teeth are arranged contiguously in the direction of rotation. This means that no first tooth is arranged between one second tooth and another second tooth.

[0051] Fig. Figure 11 is a diagram showing an example of the number of windings of the respective coils 13 attached to the teeth 12 in the second embodiment. Fig. Figure 11 shows the number of turns of the coil 13 of each phase at each of the teeth 12 and the total number of turns at each of the teeth 12. The in Fig. The 11 numbers of windings shown are each the number of windings normalized to the number of windings of all teeth 12. The in Fig. The total number of windings shown in Figure 11 is the total number of windings normalized to the number of windings in all teeth 12. This means that the number(s) of windings and the total number of windings at each of the teeth 12 are each represented by a ratio of the number of windings in the entire movable element 1. Fig. Figure 11 also shows the ratio of the number of series conductors in each phase to the number of series conductors in the entire movable element 1.

[0052] In the Fig. In the example shown in Figure 11, the total number of windings on tooth 12 with number t1, which is 0.27, and the total number of windings on tooth 12 with number t4, which is 0.27, add up to 0.54. The total number of windings on tooth 12 with number t2, which is 0.23, and the total number of windings on tooth 12 with number t3, which is 0.23, add up to 0.46. In the second embodiment, therefore, the total number of windings of the coils 13 on all first teeth in section 10 is greater than the total number of windings of the coils 13 on all second teeth in section 10.

[0053] A configuration of an engine according to a comparative example with respect to the second embodiment is now described. Fig. Figure 12 is a cross-sectional view of a motor 53 according to a comparison example with the second embodiment. Fig. Figure 13 is a diagram showing an example of the number of windings of the respective coils 13 attached to the teeth 12 in the comparative example compared to the second embodiment. This is the same as in Fig. In the motor 52 shown in Figure 10, the movable element 1 comprises four teeth 12. A coil 13 with phase +U is attached to tooth 12 numbered t1. A coil 13 with phase +V and a coil 13 with phase -U are attached to tooth 12 numbered t2. A coil 13 with phase +W is attached to tooth 12 numbered t3. A coil 13 with phase +V and a coil 13 with phase -W are attached to tooth 12 numbered t4.

[0054] In motor 53, teeth 12 numbered t1 and t3 are each a first tooth to which only one coil 13 of a single phase is attached. Coils 13 of two phases are attached to each of teeth 12 numbered t2 and t4. Teeth 12 numbered t2 and t4 are each a second tooth to which several coils 13 are attached. In motor 53, a single first tooth is arranged between two second teeth.

[0055] In the Fig. In the comparative example shown in Figure 13, the total number of windings on tooth 12 with number t1, which is 0.27, and the total number of windings on tooth 12 with number t3, which is 0.06, add up to 0.33. The total number of windings on tooth 12 with number t2, which is 0.34, and the total number of windings on tooth 12 with number t4, which is 0.40, add up to 0.74. In contrast to the case shown in Fig. In the second embodiment shown in Figure 11, the comparative example indicates that the total number of windings of the coils 13 on all first teeth in section 10 is less than the total number of windings of the coils 13 on all second teeth in section 10.

[0056] Fig. Figure 14 is a vector diagram showing induced voltages in the respective coils 13 of the motor 52 according to the second embodiment. Fig. Figure 15 is a vector diagram showing the induced voltages in the respective coils 13 of the motor 53 according to the comparative example compared to the second embodiment. Fig. 14 and Fig. The 15 vectors, represented by arrows with solid lines, are induced stress vectors. The vector diagrams of the Fig. 14 and Fig. 15 assume that a length twice the interval of the permanent magnets 21 is a phase angle of 360 degrees. Vectors represented by arrows with dashed lines are induced voltage vectors of the respective phases and are each a resultant vector obtained by combining the induced voltage vectors of the respective associated coils 13 of the respective phase.

[0057] The phase difference between two adjacent teeth 12 is given as {360 x (P / 2) / N} degrees, where P is the number of magnetic poles and N is the number of teeth 12. For example, in motor 52, tooth 12 numbered t1 and tooth 12 numbered t2 have a phase difference of 360° × (3 / 2) / 4 = 135°. The teeth 12 of motor 52 are arranged such that adjacent teeth 12 have a phase difference of 135 degrees. In the second embodiment, the value of k d,UVWalso obtained by a calculation in a similar manner to the first embodiment, wherein k d,UVW the total value of the distributed winding coefficients k d all phases, i.e. phase U, phase V and phase B.

[0058] A comparison between Fig. 14 and Fig. 15 states that the motor 52 according to the second embodiment is characterized by the fact that the phase difference between the vector “t3_V-” and the resulting vector of phase V in Fig. 14 smaller than the phase difference between the vector “t4_V+” and the resulting phase vector V in Fig. 15 is.

[0059] Fig. Figure 16 is a diagram to describe an increase in the distributed winding coefficient in the motor 52 according to the second embodiment. Fig. Figure 16 shows a bar graph representing the value of the distributed winding coefficient of motor 53 according to the comparison example, and a bar graph representing the value of the distributed winding coefficient of motor 52 according to the second embodiment. The values ​​of the distributed winding coefficient are normalized to the value of the distributed winding coefficient of motor 53. That is, a value of the distributed winding coefficient is represented by a ratio with respect to the value of the distributed winding coefficient of motor 53.

[0060] The 52 engine uses the one in Fig. 10 shown coil arrangement and the one in Fig. The number of windings shown in Figure 11 is advantageous in that it can provide a distributed winding coefficient that is higher than the distributed winding coefficient of the comparison example, which is shown in Figure 11. Fig. 12 shown coil arrangement and the one in Fig. The 13 shown numbers of windings are used.

[0061] Motor 52 does not use a configuration in which a first tooth is positioned between two second teeth. The ability of motor 52 to provide a distributed winding coefficient higher than that of the comparison example enables a reduction in the heat generation of the coils 13 in the moving element 1.

[0062] Adjusting the total number of windings on each of the teeth 12, as described above, allows the motor 52 to reduce differences in induced voltage and inductance between phases. The motor 52 can therefore be advantageous in that it can reduce the difference in the motor's terminal voltage. Furthermore, the motor 52 can reduce the difference in the total number of windings between phases and thus reduce the difference in resistance. The motor 52 can therefore be advantageous in that it can reduce local heat generation in the coils 13.

[0063] In the second embodiment, the movable element 1 is configured to satisfy conditions N=4 and C=1. This means that the movable element 1 is configured to comprise a single section 10 with four teeth 12, with such a section 10 oriented in the direction of travel. The motor 52 can comprise multiple sections 10 oriented in the direction of travel. This means that the movable element 1 can be configured to comprise multiple sections 10. Even if C is a natural number greater than 1, the motor 52 can still be advantageous in the same way as described above in the case where C equals 1.

[0064] In the second embodiment, the movable element 1 is configured to comprise a single section 10 or multiple sections 10 arranged in the direction of travel. Additionally, an auxiliary tooth may be provided at each of its two ends in the direction of travel of the movable element 1. Even with an auxiliary tooth at each end in the direction of travel of the movable element 1, the motor 52 can be advantageous in the same way as when no auxiliary tooth is provided. As in the first embodiment, the leading end section of each tooth 12 may also have a projection or recess on the side closer to the field, which is formed to face the direction of travel. As in the first embodiment, the motor 52 may also be configured such that the multiple permanent magnets 21 are embedded in the stator iron core.

[0065] According to the second embodiment, the motor 52 comprises C sections 10, which are arranged in the direction of rotation, each comprising N / C teeth 12, and each of the sections 10 comprising two second teeth arranged contiguously in the direction of rotation. The ability of the motor 52 to provide a higher distributed winding coefficient enables a reduction in heat generation of the coils 13 in the moving element 1. Therefore, the motor 52 provides an advantage in that it can reduce heat generation of the coils 13. Third embodiment.

[0066] Fig. Figure 17 is a cross-sectional view of a motor 54 according to a third embodiment. In the third embodiment, the teeth 12 and the coils 13 in the moving element 1 are arranged differently than in the first or second embodiment. In the third embodiment, components that are identical to the components of the first or second embodiment described above are designated by the same reference numerals, and the main focus is on describing the part of the configuration that differs from the first or second embodiment. This is analogous to the case of Fig. 2 is the cross-section of the in Fig. Figure 17 shows a cross-section of a section of stator 2 facing the movable element 1.

[0067] In the third embodiment, the number of magnetic poles is four, N=5, and C=1. In this third embodiment, N / C is 5 and is therefore an integer other than a multiple of 3. N is also an integer other than a multiple of 3. When such conditions are met, the motor 54 is advantageous in that it can reduce cogging torque.

[0068] In the third embodiment, each of the teeth 12 of the movable element 1 is assigned a tooth number for illustrative purposes. The teeth 12 are numbered t2, t3, t4, t5 and t1 from left to right in Fig. 17 assigned.

[0069] Thirteen coils for three phases are attached to the five teeth 12. A coil 13 with phase -V is attached to tooth 12 numbered t2. A coil 13 with phase +V and a coil 13 with phase -W are attached to tooth 12 numbered t3. A coil 13 with phase +W is attached to tooth 12 numbered t4. A coil 13 with phase +U is attached to tooth 12 numbered t5. A coil 13 with phase -U is attached to tooth 12 numbered t1.

[0070] The teeth 12 numbered t2, t4, t5, and t1 are each teeth 12 to which only one coil 13 with a single phase is attached. The tooth 12 numbered t3 is a tooth 12 to which coils 13 of two phases are attached. Therefore, the multiple teeth 12 of the movable element 1 comprise first teeth, each of which is a tooth 12 to which only one coil 13 of a single phase is attached, and a second tooth, which is a tooth 12 to which coils 13 of multiple phases are attached. The teeth 12 numbered t2, t4, t5, and t1 are the first teeth. The tooth 12 numbered t3 is the second tooth. The tooth 12 numbered t2 and the tooth 12 numbered t1, each of which is a tooth 12 positioned at one end in the direction of travel of the movable element 1, are first teeth.

[0071] In the motor 54, C sections 10 are arranged in the direction of rotation, each section 10 comprising teeth 12. In the third embodiment, a single section 10 with five teeth 12 is arranged in the direction of rotation. In addition, in the third embodiment, the section 10 comprises a single second tooth.

[0072] An insulator is attached to the second tooth for phase-to-phase insulation. The second tooth has a winding area that is smaller than that of the first teeth by the area occupied by the insulator. Additionally, a protective element is attached to each of the teeth 12 positioned at the ends in the direction of travel of the moving element 1 to protect the corresponding coil 13. The teeth 12 positioned at the ends each have a winding area that is smaller than that of the teeth 12 positioned at positions other than the ends by the area occupied by the protective element.

[0073] If a second tooth were arranged at one end in the direction of travel of the moving element 1, an insulator and a protective element would be attached to this second tooth, significantly reducing the winding area of ​​this second tooth. This would require coils 13 formed from a small-diameter conductor cable to be attached to this second tooth to ensure a sufficient number of windings, meaning that a smaller cable diameter would generate a higher amount of heat from the corresponding coils 13.

[0074] In the motor 54, the use of a first tooth for each of the teeth 12, positioned at the ends in the direction of rotation of the moving element 1, prevents a local decrease in the winding area at each of the teeth 12 positioned at the ends in the direction of rotation of the multiple teeth 12. A coil 13, formed from a conductor cable of large diameter, can be arranged at each of the first teeth positioned at the ends in the direction of rotation, thereby reducing the heat generation of the corresponding coils 13. Therefore, by using a first tooth for each of the teeth 12 positioned at the ends in the direction of rotation of the moving element 1, the motor 54 offers the advantage of reducing the heat generation of the coils 13.

[0075] In the first and second embodiments, the motors 50 and 52 can also be advantageous in that they can reduce heat generation in the coils 13 by using a first tooth for each of the teeth 12, which are positioned at the ends in the direction of travel of the movable element 1.

[0076] In the third embodiment, the movable element 1 is configured to comprise a single section 10 with five teeth 12, with such a section 10 oriented in the direction of travel. The motor 54 can comprise multiple sections 10 oriented in the direction of travel. This means that the movable element 1 can be configured to comprise multiple sections 10. In this case, C is a natural number greater than 1. Even if C is a natural number greater than 1, the motor 54 can still be advantageous in the same way as described above in the case where C equals 1.

[0077] In the third embodiment, the movable element 1 is configured to comprise a single section 10 or multiple sections 10 arranged in the direction of travel. Furthermore, an auxiliary tooth may be provided at each of its two ends in the direction of travel of the movable element 1. Even with an auxiliary tooth at each of its two ends in the direction of travel of the movable element 1, the motor 54 can still be advantageous in the same way as when no auxiliary tooth is provided. As in the first or second embodiment, the leading end section of each of the teeth 12 may also have a projection or recess on the side closer to the field, which is formed to face the direction of travel. As in the first or second embodiment, the motor 54 may also be configured such that the multiple permanent magnets 21 are embedded in the stator iron core. Fourth embodiment.

[0078] Fig. Figure 18 is a cross-sectional view of a motor 55 according to a fourth embodiment. In the fourth embodiment, the teeth 12 and the coils 13 in the moving element 1 are arranged differently than in the first to third embodiments. In the fourth embodiment, components that are identical to the components of the first to third embodiments described above are designated by the same reference numerals, and mainly the part of the configuration that differs from the first to third embodiments is described. This is analogous to the case of Fig. 2 is the cross-section of the in Fig. Figure 18 shows a cross-section of a section of stator 2 facing the movable element 1.

[0079] In the fourth embodiment, the number of magnetic poles is 3, N = 4, and C = 1. In this fourth embodiment, N / C is 4 and is therefore an integer other than a multiple of 3. N is also an integer other than a multiple of 3. When such conditions are met, the motor 55 is advantageous in that it can reduce cogging torque.

[0080] In the fourth embodiment, each of the teeth 12 of the movable element 1 is assigned a tooth number for illustrative purposes. The teeth 12 are numbered t1, t2, t3 and t4 from left to right. Fig. 18 allocated.

[0081] Thirteen coils for three phases are attached to the four teeth 12. A coil 13 with phase +U is attached to tooth 12 numbered t1. A coil 13 with phase +V is attached to tooth 12 numbered t2. A coil 13 with phase +W and a coil 13 with phase -V are attached to tooth 12 numbered t3. A coil 13 with phase -W is attached to tooth 12 numbered t4.

[0082] The teeth 12 numbered t1, t2, and t4 are each teeth to which only one coil 13 of a single phase is attached. The tooth 12 numbered t3 is a tooth 12 to which coils 13 of two phases are attached. Therefore, the multiple targets 12 of the moving element 1 comprise first teeth, each of which is a tooth 12 to which only one coil 13 of a single phase is attached, and a second tooth, which is a tooth 12 to which coils 13 of multiple phases are attached. The teeth 12 numbered t1, t2, and t4 are the first teeth. The tooth 12 numbered t3 is the second tooth. The tooth 12 numbered t1 and the tooth 12 numbered t4, each of which is a tooth 12 positioned at one end in the direction of travel of the moving element 1, are first teeth.The motor 55 can reduce heat generation of the coils 13 by using a first tooth for each of the teeth 12 that are positioned at one end in the direction of travel of the moving element 1.

[0083] In the motor 55, C sections 10 are arranged in the direction of rotation, each section 10 comprising teeth 12. In the fourth embodiment, a single section 10 with four teeth 12 is arranged in the direction of rotation. In addition, in the fourth embodiment, the section 10 comprises a single second tooth.

[0084] Fig. Figure 19 is a diagram showing an example of the number of windings of the respective coils 13 attached to the teeth 12 in the fourth embodiment. Fig. Figure 19 shows the number of windings of the coil 13 of the respective phase at each of the teeth 12 and the total number of windings at each of the teeth 12. The in Fig. The 19 numbers of windings shown are each the number of windings normalized to the number of windings of all teeth 12. The in Fig. The total number of windings shown in Figure 19 is the total number of windings normalized to the number of windings on all teeth 12. This means that the number(s) of windings and the total number of windings on each of the teeth 12 are each represented by a ratio of the number of windings in the entire movable element 1. Fig. Figure 19 also shows the ratio of the number of series conductors in each phase to the number of series conductors in the entire movable element 1.

[0085] As in Fig. As shown in Figure 19, the total number of windings on tooth 12 numbered t3 is 0.23. Tooth 12 numbered t2 and tooth 12 numbered t4 are each first teeth adjacent to the second tooth. Tooth 12 numbered t1 is a first tooth adjacent to the second tooth with a single first tooth between them. The total number of windings on tooth 12 numbered t1, which is 0.32, is greater than the total number of windings on tooth 12 numbered t2 and tooth 12 numbered t4, which is 0.23. Therefore, in section 10 of the fourth embodiment, the total number of windings of the coils 13 on the first tooth adjacent to the second tooth with a single first tooth between them is greater than the total number of windings of the coils 13 on each of the first teeth adjacent to the second tooth.

[0086] Fig. Figure 20 is a diagram illustrating an increase in the distributed winding coefficient in the motor 55 according to the fourth embodiment. For the purposes of this discussion, it is assumed that the motor in the comparison example is configured like the motor 53 in the fourth embodiment. Fig. 12 is shown. Fig. Figure 20 shows a bar graph representing the value of the distributed winding coefficient of motor 53 according to the comparison example, and a bar graph representing the value of the distributed winding coefficient of motor 55 according to the fourth embodiment. The values ​​of the distributed winding coefficient are normalized to the value of the distributed winding coefficient of motor 53. That is, a value of the distributed winding coefficient is represented by a ratio based on the value of the distributed winding coefficient of motor 53.

[0087] The 55 engine uses the one in Fig. 18 shown coil arrangement and the one in Fig. The number of windings shown in Figure 19 is advantageous in that it can provide a distributed winding coefficient that is higher than the distributed winding coefficient in the comparative example shown in Figure 19. Fig. 12 shown coil arrangement and the one in Fig. The 13 shown numbers of windings are used.

[0088] Motor 55 does not use a configuration in which a first tooth is positioned between two second teeth. The ability of motor 55 to provide a distributed winding coefficient higher than that in the comparison example allows for a reduction in heat generation from the coils 13 in the moving element 1.

[0089] Adjusting the total number of windings on each of the teeth 12, as described above, allows the motor 55 to reduce the difference in induced voltage between phases and the difference in inductance between phases. Furthermore, the motor 55 can increase the distributed winding coefficient. Due to its ability to reduce the current required to maintain the same thrust, the motor 55 can reduce heat generation in the coils 13. Therefore, the motor 55 offers the advantage of reducing heat generation in the coils 13.

[0090] In the fourth embodiment, the movable element 1 is configured to comprise a single section 10 with four teeth 12, with such a section 10 oriented in the direction of travel. The motor 55 can comprise multiple sections 10 oriented in the direction of travel. This means that the movable element 1 can be configured to comprise multiple sections 10. In this case, C is a natural number greater than 1. Even if C is a natural number greater than 1, the motor 55 can still be advantageous in the same way as described above in the case where C equals 1.

[0091] In the fourth embodiment, the movable element 1 is configured to comprise a single section 10 or multiple sections 10 arranged in the direction of travel. Furthermore, an auxiliary tooth may be provided at each of its two ends in the direction of travel of the movable element 1. Even with an auxiliary tooth at each of its two ends in the direction of travel of the movable element 1, the motor 55 can still be advantageous in the same way as when no auxiliary tooth is provided. Similarly, as in the first to third embodiments, a leading end section of each of the teeth 12 may have a projection or recess on the side closer to the field, formed in such a way as to be directed in the direction of travel.In the same way as in the first to third embodiments, the motor 55 can also be configured such that the multiple permanent magnets 21 are embedded in the stator iron core. Fifth embodiment.

[0092] Fig. Figure 21 is a cross-sectional view of a motor 56 according to a fifth embodiment. In the fifth embodiment, the coils 13 on tooth 12 numbered t3, which is the second tooth, are arranged differently than the corresponding coils 13 of the motor shown in Figure 21. Fig. Motor 50 shown in Figure 2. Motor 56 is configured in the same way as motor 50, except that the coils 13 on tooth 12 numbered t3 are arranged differently than the corresponding coils 13 of motor 50. In the fifth embodiment, components that are identical to the components of the first to fourth embodiments described above are designated by the same reference numerals, and the main focus is on describing the part of the configuration that differs from the first to fourth embodiments. This is analogous to the case of Fig. 2 is the cross-section of the in Fig. Figure 21 shows a cross-section of a section of stator 2 facing the movable element 1.

[0093] The teeth 12 each extend from the core back section 11 to the stator 2. The direction from the core back section 11 to the stator 2 is referred to here as the longitudinal direction of the teeth 12. At the in Fig. In tooth 12 shown with number t3, coil 13 with phase +V and coil 13 with phase -W lie next to each other in the longitudinal direction of teeth 12. In contrast, at the one shown in Fig. In tooth 12, numbered t3, shown in Figure 21, coil 13 with phase +V is wound on the inside, i.e., on the side closer to tooth 12. Coil 13 with phase -W is wound outside of coil 13 with phase +V. This means that on tooth 12, numbered t3, coil 13 with phase +V is attached first, and coil 13 with phase -W is then attached above it. It should be noted that on tooth 12, numbered t3, coil 13 with phase -W can be attached first, and then coil 13 with phase +V can be attached above it.

[0094] The arrangement of the coils 13 of the second tooth, as described in the fifth embodiment, allows the positions of a winding start and a winding end of these coils 13 to be aligned with positions in contact with the core back section 11. This means that the positions of a winding start and a winding end of the coils 13 can be consistently placed on the side closer to the core back section 11 for all coils 13 in the moving element 1. This allows the distance from the position of a winding end of each coil 13 to the neutral point, or the distance from the position of a winding start of each coil 13 to the terminal, to be minimized, thereby reducing the resistance of the coils 13. The motor 56 can thus be advantageous in that it can reduce heat generation in the coils 13.

[0095] The arrangement of the coils 13 on the second tooth, as described in the fifth embodiment, ensures that the magnetic fluxes flowing through the coils 13 remain constant. The motor 56 can therefore be advantageous in that it can reduce the difference in inductance between phases and the difference in the connection voltage of the motor 56.

[0096] In the fifth embodiment, the movable element 1 is configured to comprise a single section 10 with five teeth 12, with such a section 10 arranged in the direction of travel. The motor 56 can comprise multiple sections 10 arranged in the direction of travel. This means that the movable element 1 can be configured to comprise multiple sections 10. In this case, C is a natural number greater than 1. Even if C is a natural number greater than 1, the motor 56 can still be advantageous in the same way as described above in the case where C equals 1.

[0097] In the fifth embodiment, the movable element 1 is configured to comprise a single section 10 or multiple sections 10 arranged in the direction of travel. Furthermore, an auxiliary tooth may be provided at each of its two ends in the direction of travel of the movable element 1. Even with an auxiliary tooth at each of its two ends in the direction of travel of the movable element 1, the motor 56 can still be advantageous in the same way as when no auxiliary tooth is provided. As in the first to fourth embodiments, the leading end section of each of the teeth 12 may also have a projection or recess on the side closer to the field, shaped to face the direction of travel. As in the first to fourth embodiments, the motor 56 may also be configured such that the multiple permanent magnets 21 are embedded in the stator iron core.

[0098] The configuration of each of the motors 50, 52, 54, 55, and 56 according to the first through fifth embodiments can be applied in a rotating electric machine. A rotating electric machine is a motor comprising a stator and a rotor, which rotates the rotor. An advantage equivalent to that of motors 50, 52, 54, 55, and 56 can also be provided when the configuration of any one of the motors 50, 52, 54, 55, and 56 is used in a rotating electric machine.

[0099] The configurations described in the preceding embodiments are merely examples of aspects of the present disclosure. The configuration of each embodiment can be combined with another known technology. Configurations of different embodiments can be combined with one another as required. A part of the configuration of each embodiment can be omitted and / or modified without departing from the spirit of the present disclosure. Reference symbol list 1 movable element; 2 Stator; Section 10; 11 Core back section; 12 teeth; 13 coils; 21 Permanent magnet; 22 Mounting point; 50, 51, 52, 53, 54, 55, 56 engine; 60 Leadership; 70 gliders; 100 motor system.

Claims

[1] Motor (50; 54; 55; 56), comprising: a field (2); and a runner (1) which is facing the field (2) and is arranged to be movable relative to the field (2), wherein the rotor (1) comprises a core back (11), several teeth (12) and several coils (13), wherein the several teeth (12) each extend from the core back (11) to the field (2) and are arranged in a direction of travel of the rotor (1) with respect to the field (2), wherein the several coils (13) are attached to the several teeth (12), wherein the multiple teeth (12) comprise at least one first tooth and at least one second tooth, wherein each of the at least one first tooth is a tooth to which only one coil of a single phase of the coils (13) is attached, wherein each of the at least one second tooth is a tooth to which coils of multiple phases of the coils (13) are attached, wherein the multiple coils (13) are each arranged such that they do not extend beyond a slot formed by adjacent teeth, wherein C sections (10) are arranged in the direction of travel, wherein the section (10) comprises N / C teeth (12), where N is the number of teeth (12) of the runner (1), wherein C is a greatest common divisor of N and the number of magnetic poles of the field (2), the magnetic poles being located in a region facing the N teeth (12), and where the number of second teeth per section of the C sections (10) is one. [2] Motor (54) according to claim 1, wherein a tooth of the several teeth (12) positioned at one end in the direction of travel of the rotor (1) is the first tooth. [3] Motor (52), comprising: a field (2); and a runner (1) which is facing the field (2) and is arranged to be movable relative to the field (2), wherein the rotor (1) comprises a core back (11), several teeth (12) and several coils (13), wherein the several teeth (12) each extend from the core back (11) to the field (2) and are arranged in a direction of travel of the rotor (1) with respect to the field (2), wherein the several coils (13) are attached to the several teeth (12), wherein the multiple teeth (12) comprise at least two first teeth and at least two second teeth, each of the first teeth being a tooth to which only one coil of a single phase of the coils (13) is attached, each of the second teeth being a tooth to which coils of multiple phases of the coils (13) are attached, wherein the multiple coils (13) are each arranged such that they do not extend beyond a slot formed by adjacent teeth, wherein C sections (10) are arranged in the direction of travel, wherein the section (10) comprises N / C teeth (12), where N is the number of teeth (12) of the runner (1), wherein C is a greatest common divisor of N and the number of magnetic poles of the field (2), the magnetic poles being located in a region facing the N teeth (12), and wherein in each section of the C sections (10) two second teeth of the multiple teeth (12) are arranged contiguously in the direction of travel and each of the two second teeth is arranged next to one of the first teeth. [4] Motor (52) according to claim 3, wherein a tooth of the several teeth (12) positioned at one end in the direction of travel of the rotor (1) is the first tooth. [5] Motor (55) according to claim 1 or 2, where N / C equals four, and wherein the total number of windings of a coil of the coils (13) on the first tooth, which is next to the second tooth with a single first tooth of the several teeth (12) between the first tooth and the second tooth, is greater than the total number of windings of a coil of the coils (13) on the first tooth, which is next to the second tooth. [6] Motor (52) according to claim 3 or 4, where N / C equals four, and the number of second teeth per section of the C sections (10) is two, and wherein the total number of windings of coils of the coils (13) on all first teeth per section of the C sections (10) is greater than the total number of windings of coils of the coils (13) on all second teeth per section of the C sections (10). [7] Motor (50) according to claim 1 or 2, where N / C equals five, and wherein the total number of windings of a coil of the coils (13) at the first tooth which is next to the second tooth is greater than the total number of windings of coils of the coils (13) at the second tooth, and the total number of windings of a coil of the coils (13) at the first tooth which is next to the second tooth with a single first tooth of the several teeth (12) between the first tooth and the second tooth is less than the total number of windings of a coil of the coils (13) at the first tooth which is next to the second tooth.

Images