JP4568307B2 - DC machine - Google Patents

Description

  The present invention relates to a DC machine.

  Conventionally, when the number of magnetic poles of a DC machine magnet is increased, it is necessary to optimize the combination of various components such as the number of coil magnetic poles, the number of commutator segments, and the winding connection structure with respect to the number of magnet magnetic poles. Has been.

  An object of the present invention is to provide a high-performance DC machine by optimizing predetermined components.

  In order to solve the above-described problems, the invention according to claim 1 includes a stator having a plurality of field poles and a commutator including a plurality of segments, and a plurality of armature coils connected to a predetermined segment. A DC machine comprising: an armature wound around an armature core; and an anode-side and cathode-side brush that slidably contacts a segment of the commutator and supplies power. “6”, the number of coils of the armature coil is “8”, the number of segments of the commutator is “24”, and the armature coil is configured by concentrated winding around the teeth of the armature core, All of the armature coils are connected in series so as to form one closed loop, and the armature coils are connected so that the number of parallel circuits between the brushes is “2”. Without the winding being cut The commutator is connected to a predetermined segment and wound around the predetermined teeth alternately and is wound around all the armature coils, and the adjacent segments before and after the predetermined winding around the teeth. The windings are connected to each other, three segments positioned at 120 ° intervals are short-circuited by a short-circuit wire, and short-circuit wires are set for all the segments, and all the armature coils and all the short-circuit wires are Was connected without cutting the winding.

  According to a second aspect of the present invention, in the DC machine according to the first aspect, the three segments include two segments connected to the short-circuit wire and the armature coil, and the short-circuit between the two segments. It consisted of one segment connected to the line only.

(Function)
According to the invention described in each claim, in the DC machine, the number of field poles is “6”, the number of armature coils is “8”, and the number of commutator segments is “24”. The armature coil is configured by concentrated winding on the teeth of the armature core, and all the armature coils are connected in series so as to form one closed loop, and a parallel circuit between the anode side and cathode side brush The armature coils are connected so that the number becomes “2”. That is, since the number of field poles is an even number, the field poles are well balanced, and when the number is divided by “6” and “2”, the field poles facing each other in the radial direction are different from each other. become. Therefore, it is easy to configure a DC machine with good rectification. In addition, since the number of coils of the armature coil is an even number, the armature coil is well balanced, and it is composed of an even number that is “8” and not an integral multiple of the number of magnetic poles of the field poles. Can be easily eliminated. The number of commutator segments can be easily set by the number of field poles and the number of armature coils. The armature coil is configured by concentrated winding on the teeth of the armature core, and all the armature coils are connected in series so as to form one closed loop, and a parallel circuit between the anode side and the cathode side brush The armature coils are connected so that the number becomes “2”. Therefore, since the voltage applied to each armature coil can be reduced, rectification is good. The generated torque of the DC machine is known to decrease with the increase in the number of parallel circuits between the anode side and the cathode side brush, and the DC machine with the number of parallel circuits of “2” can obtain a large generated torque. Can do. Incidentally, when generating a torque equivalent to that of a DC machine having a parallel circuit number “2” in a DC machine having a parallel circuit number “4”, the number of turns of the armature coil needs to be doubled. In this respect, the rectification is good if the number of parallel circuits is “2”. Thus, a high-performance DC machine can be configured by optimizing these predetermined components.

  According to the present invention, it is possible to provide a high-performance DC machine by optimizing predetermined components.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a DC machine 101 of this embodiment includes a stator 102 and an armature 103 that is a rotor. The stator 102 includes a cylindrical yoke 104 and six magnets 105 as field poles. The stator 102 is disposed and fixed on the inner peripheral surface of the yoke 104 at an equal angle (60 °) interval. That is, in this embodiment, the number of magnet magnetic poles P is set to “6”. Inside these magnets 105, an armature 103 is rotatably accommodated.

  The armature 103 has a rotating shaft 103a. An armature core (hereinafter simply referred to as a core) 103b is fixed to the rotating shaft 103a. The core 103b has eight teeth, that is, first to eighth teeth 106a to 106h, and eight slots, that is, first to eighth slots 107a to 107h are formed between the teeth 106a to 106h. . The first slot 107a is a slot 107 between the fourth and fifth teeth 106d and 106e, and the first to eighth teeth 106a to 106h and the first to eighth slots 107a to 107h are clockwise in FIG. Arranged in order.

  The armature 103 has a commutator 108. The commutator 108 has 24 segments, that is, first to 24th segments 1 to 24, and the segments 1 to 24 are provided at equiangular intervals. The number of segments “24” is obtained from the following equation “(number of magnetic poles P × number of coils C) / 2” using the number of magnet magnetic poles P and the number of coils C described later. The first segment 1 is a segment at the center position in the circumferential direction of the first slot 107a (the segment at the middle position between the fourth and fifth teeth 106d, 106e), and the first to 24th segments 1-24. Are arranged in the clockwise direction in FIG.

Here, the winding connection of the armature 103 of this embodiment will be described.
As shown in FIGS. 1 and 2, the winding 109 (shown by a broken line in FIG. 1) connected to the first segment 1 is set to a predetermined number of turns in the sixth tooth 106f between the third slot 107c and the second slot 107b. Then, the tenth segment 10 is connected. Next, the winding 109 connected to the tenth segment 10 is wound around the first tooth 106a between the sixth slot 107f and the fifth slot 107e with a predetermined number of turns, and then connected to the nineteenth segment 19. Next, the winding 109 connected to the nineteenth segment 19 is wound around the fourth tooth 106d between the first slot 107a and the eighth slot 107h with a predetermined number of turns, and then connected to the fourth segment 4.

  Next, the winding 109 connected to the fourth segment 4 (shown by a solid line in FIG. 1) is wound around the seventh tooth 106g between the fourth slot 107d and the third slot 107c with a predetermined number of turns, and then the thirteenth. Connect to segment 13. Next, the winding 109 connected to the thirteenth segment 13 is wound around the second tooth 106b between the seventh slot 107g and the sixth slot 107f with a predetermined number of turns, and then connected to the twenty-second segment 22. Next, the winding 109 connected to the 22nd segment 22 is wound around the fifth tooth 106e between the second slot 107b and the first slot 107a with a predetermined number of turns, and then connected to the seventh segment 7.

  Next, after winding the winding 109 connected to the seventh segment 7 (indicated by a two-dot chain line in FIG. 1) around the eighth tooth 106h between the fifth slot 107e and the fourth slot 107d with a predetermined number of turns, The 16th segment 16 is connected. Next, the winding 109 connected to the sixteenth segment 16 is wound around the third tooth 106c between the eighth slot 107h and the seventh slot 107g with a predetermined number of turns, and then connected to the first segment 1 and wound. The winding of the wire 109 is finished.

  That is, in this embodiment, every other segment 1, 4,..., 22 is used, and connection to the segments 1, 4,..., 22 and winding around the teeth 106a to 106h (in this case, 8 armature coils, that is, first to eighth coils 110a to 110h are configured by alternately repeating (concentrated winding). That is, in this embodiment, the number of coils C is “8”. In the present embodiment, the sixth coil 110f (sixth tooth 106f) and the first coil 110a (first tooth 106a) every two teeth sandwiching the connection to the tenth segment 10, This is repeated over all of the coils 110a-110h. In other words, in the present embodiment, the coils 110a to 110h can all be wound without cutting one winding 109. In this case, the segments 1, 4,..., 22 connected between the two coils 110a to 110h wound continuously are between the teeth 106a to 106h around which the coils 110a to 110h are wound. Located in the center in the circumferential direction. In the present embodiment, all of the coils 110a to 110h are connected in series so as to form one closed loop.

  Six brushes held by a brush holder (not shown), that is, first to sixth brushes 111a to 111f are in sliding contact with the commutator 108, respectively. The brushes 111 a to 111 f are arranged at equiangular (60 °) intervals so that the center lines in the width direction (circumferential direction) coincide with the center lines in the circumferential direction of the magnets 105. The first to sixth brushes 111a to 111f are sequentially arranged in the clockwise direction in FIG. 1, and the first, third, and fifth brushes 111a, 111c, and 111e are anode side (+ pole side) brushes, The second, fourth, and sixth brushes 111b, 111d, and 111f are cathode side (-polar side) brushes. Each brush 111a to 111f supplies a drive current for rotating the armature 103 from the commutator 108.

  Here, as shown in FIGS. 1 and 2, if the first brush 111a is in contact with only the 22nd segment 22 (at the time of non-rectification), the brush on the anode side that supplies power is the first brush 111a. The cathode brush is the fourth brush 111d. In this case, the fifth coil 110e, the eighth coil 110h, the third coil 110c, and the sixth coil 110f are connected in series between the brushes 111a and 111d, and the second coil 110b and the seventh coil 110f are connected in series. The coil 110g, the fourth coil 110d, and the first coil 110a are connected in series. That is, in the connection structure of the winding 109 of the present embodiment, the number of parallel circuits between the pair of anode-side and cathode-side brushes (in this case, the brushes 111a and 111d) that are supplying power is configured to be “2”. Has been.

Next, features of this embodiment will be described below.
(1) The DC machine 101 of the present embodiment is configured by an even number “6” that becomes an odd number when the number P of the magnet 105 that is a field pole is divided by “2”, and the number C of the coils 110a to 110h is C. “8” is not an integral multiple of the number of magnetic poles P of the magnet 105, and the number of segments of the commutator 108 is 24 ((number of magnetic poles P × number of coils C) / 2). In the DC machine 101, the coils 110a to 110h are configured by concentrated winding around the teeth 106a to 106h of the core 103b, and all of the coils 110a to 110h are connected in series so as to form one closed loop and supply power. The coils 110a to 110h are connected so that the number of parallel circuits between the paired anode-side and cathode-side brushes 111a to 111f is “2”.

  That is, since the number of magnetic poles P of the magnet 105 is an even number, the balance of the magnet 105 is good, and since the number of magnetic poles “6” is an even number that becomes an odd number when divided by “2”, the magnet 105 facing in the radial direction is opposed. Are different from each other. Therefore, it is easy to configure the DC machine 101 with good rectification. Further, since the number of coils C of the coils 110a to 110h is an even number, the coils 110a to 110h are well balanced, and “8” of the number of coils C is constituted by an even number that is not an integral multiple of the number of magnetic poles P of the magnet 105. Combinations that do not hold as the DC machine 101 can be easily eliminated. Further, the number of segments of the commutator 108 can be easily set by the number of magnetic poles P of the magnet 105 and the number of coils C of the coils 110a to 110h. In addition, the coils 110a to 110h are configured by concentrated winding around the teeth 106a to 106h of the core 103b, and the coils 110a to 110h are all connected in series so as to form one closed loop and are supplied with power. The coils 110a to 110h are connected so that the number of parallel circuits between the anode side and the cathode side brushes 111a to 111f is “2”. Therefore, the voltage applied to each of the coils 110a to 110h can be reduced, so that rectification is good. Further, the torque generated by the DC machine 101 is known to decrease as the number of parallel circuits between the anode side and cathode side brushes 111a to 111f increases, and the DC machine 101 having the number of parallel circuits of “2” is large. Generated torque can be obtained. Incidentally, when generating a torque equivalent to the DC machine 101 having the parallel circuit number “2” in the DC machine having the parallel circuit number “4”, it is necessary to double the number of turns of the coil. Since the inductance increases and the rectification becomes severe, the rectification is good if the number of parallel circuits is “2” from this point. Thus, in this embodiment, these predetermined components can be optimized to configure the high-performance DC machine 101. Further, in this embodiment, the number of magnetic poles P of the magnet 105 and the number of coils C of the coils 110a to 110h are set to “8”, so that the number of magnetic poles P of the magnet 105 and the number of coils of the coils 110a to 110h are increased. C can be reduced.

  Incidentally, in the present embodiment, the number of magnetic poles P of the magnet 105 is “6” and the number of coils C of the coils 110a to 110h is “8”, but the number of magnetic poles P of the magnet (field magnetic pole) is “6” or more and Divide by “2” to make up an even number that is odd, and make the number of armature coils C an even number that is not less than “8” and an integral multiple of the number of field poles P, and the number of commutator segments (Number of magnetic poles P × number of coils C) / 2, and the armature coil is configured by concentrated winding around the armature core teeth, and all the armature coils are connected in series so as to form one closed loop. If the armature coils are connected so that the number of parallel circuits between the anode side and cathode side brushes is “2”, a high-performance DC machine can be configured in the same manner as described above.

  (2) The coils 110a to 110h of the present embodiment are configured by alternately repeating the connection of the commutator 108 to the predetermined segments 1, 4,..., 22 and the winding to the predetermined teeth 106a to 106h. It is. The coils 110a to 110h wound around the teeth 106a to 106h and the coils 110a to 110h wound around the next teeth 106a to 106h sandwiching the connection to the segments 1, 4,. It is set every two. In this way, all the coils 110a to 110h can be wound without cutting one winding 109. Therefore, the winding work of the coils 110a to 110h can be facilitated.

  Incidentally, when the number of coils C is increased according to the above, if the number obtained by adding “1” is less than half of the number of coils C of the armature coil and the number of coils C is set every even number that is not divisible, All armature coils can be wound without cutting the windings, and the winding operation of the armature coils can be facilitated.

  (3) In the present embodiment, the segments 1, 4,..., 22 connected between the two coils 110a to 110h that are wound continuously are the teeth 106a to 106h on which the coils 110a to 110h are wound. It is located in the center in the circumferential direction between 106h. In this way, the connection structure of the coils 110a to 110h becomes simple, and the winding work of the coils 110a to 110h can be made easier.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 3 shows a development view of the DC machine 101a of the present embodiment. The DC machine 101a of the present embodiment includes six magnets 105, eight armature coils (first to eighth coils) 112a to 112h, and 24 segments (first to 24th segments) 1 to 24. , Eight short circuit members (first to eighth short lines) 113a to 113h, and two brushes (first and second brushes) 114a and 114b.

  The first coil 112a is connected to the second and third segments 2 and 3, and the second coil 112b is connected to the fifth and sixth segments 5 and 6. The third coil 112 c is connected to the eighth and ninth segments 8 and 9, and the fourth coil 112 d is connected to the eleventh and twelfth segments 11 and 12. The fifth coil 112e is connected to the fourteenth and fifteenth segments 14 and 15, and the sixth coil 112f is connected to the seventeenth and eighteenth segments 17 and 18. The seventh coil 112g is connected to the twentieth and twenty-first segments 20 and 21, and the eighth coil 112h is connected to the twenty-third and twenty-fourth segments 23 and 24. Incidentally, as shown in FIG. 4, the coils 112 a to 112 h of the present embodiment are connected to the connected segments 2, 3,..., 23, 24, respectively, on the opposite sides of the rotating shaft 103 a. Each winding 109 is concentratedly wound around 106h. The coils 112a to 112h may be formed by winding the winding 109 around the teeth 106a to 106h located in front of the connected segments 2, 3,..., 23, 24.

  The first short-circuit line 113a short-circuits the ninth, first, and seventeenth segments 9, 1, and 17, and the second short-circuit line 113b short-circuits the eighteenth, tenth, and second segments 18, 10, and 2. The third short-circuit line 113c short-circuits the third, nineteenth, eleventh segments 3, 19, and 11, and the fourth short-circuit line 113d short-circuits the twelfth, fourth, and twentieth segments 12, 4, and 20. The fifth short-circuit line 113e short-circuits the twenty-first, thirteenth, and fifth segments 21, 13, and 5, and the sixth short-circuit line 113f short-circuits the sixth, twenty-second, and fourteenth segments 6, 22, and 14. The seventh short-circuit line 113g short-circuits the fifteenth, seventh, and twenty-third segments 15, 7, and 23, and the eighth short-circuit line 113h short-circuits the twenty-fourth, sixteenth, and eighth segments 24, 16, and 8. That is, each short circuit line 113a-113h short-circuits the three segments 1-24 arrange | positioned with the space | interval of 120 degrees used as the same electric potential, respectively. Further, when the short-circuit wires 113a to 113h are set for the segments 1 to 24 in this way, the coils 112a to 112h and the short-circuit wires 113a to 113h are connected without cutting one winding 109. Can do.

  The first and second brushes 114 a and 114 b are arranged at an equal angle (180 °) interval so that the center line in the width direction (circumferential direction) coincides with the center line in the circumferential direction of the predetermined magnet 105. Has been. The first brush 114a is an anode side (+ polar side) brush, and the second brush 114b is a cathode side (−polar side) brush. That is, in this embodiment, the anode side and cathode side brushes can be driven by the pair of brushes 114a and 114b.

Next, features of this embodiment will be described below.
(1) Also in the DC machine 101a of the present embodiment, as described in (1) of the first embodiment, an even number which becomes an odd number when the number P of the magnetic poles of the magnet 105 which is a field pole is divided by “2”. “6”, the number of coils 112a to 112h is an even number “8” that is not an integral multiple of the number of magnetic poles P of the magnet 105, and the number of segments of the commutator 108 is 24 ((the number of magnetic poles P × The number of coils is C) / 2). Also, in the DC machine 101a of this embodiment, the coils 112a to 112h are configured by concentrated winding around the teeth 106a to 106h of the core 103b, and the coils 112a to 112h are all connected in series so as to form one closed loop. The coils 112a to 112h are connected so that the number of parallel circuits between the anode side and cathode side brushes 114a and 114b is “2”. Therefore, the DC machine 101a of this embodiment can also be configured with high performance.

  (2) The DC machine 101a of the present embodiment includes first to eighth short-circuit lines 113a to 113h that short-circuit the three segments 1 to 24 positioned at 120 °, and the anode side and cathode side brushes are It is comprised so that it can drive with a pair of brush 114a, 114b. Therefore, since the number of brushes can be reduced, the space for arranging the brushes 114a and 114b can be reduced, which can contribute to the miniaturization of the DC machine 101a.

  Incidentally, when the number of magnetic poles P is increased, if the short-circuit line is short-circuited between the “pole number P / 2” segments located at “360 ° / (pole number P / 2)”, the anode side and the cathode A pair of side brushes can be driven. In this way, the number of brushes can be reduced in the same manner as described above, so that the space for arranging the brushes can be reduced, and the DC machine can be reduced in size.

  (3) Each coil 112a-112h of this embodiment is wound around each tooth 106a-106h located on the opposite side across the rotating shaft 103a from the connected segments 2, 3, ..., 23, 24. It is configured. Therefore, the connecting wire (winding 109) extending from the segments 2, 3,..., 23, 24 to the teeth 106a to 106h can be arranged so as to be substantially wound around the rotating shaft 103a. Therefore, compared with the connecting wire in the case where the winding 109 is wound around each of the teeth 106a to 106h located in front of the connected segments 2, 3,... The outward protrusion can be kept small. Therefore, the short-circuit wires 113a to 113h are prevented from projecting outward in the radial direction when the short-circuit wires 113a to 113h run on the jumper wires, which can contribute to downsizing of the DC machine 101a.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 5 shows a development view of the DC machine 101b of the present embodiment. The DC machine 101b of the present embodiment includes six magnets 105, ten armature coils (first to tenth coils) 115a to 115j, and thirty segments (first to thirty segments) 1 to 30. And six brushes (first to sixth brushes) 111a to 111f.

  The first coil 115 a is connected to the 28th and seventh segments 28, 7, and the second coil 115 b is connected to the first and tenth segments 1, 10. The third coil 115 c is connected to the fourth and thirteenth segments 4 and 13, and the fourth coil 115 d is connected to the seventh and sixteenth segments 7 and 16. The fifth coil 115 e is connected to the tenth and nineteenth segments 10 and 19, and the sixth coil 115 f is connected to the thirteenth and twenty-second segments 13 and 22. The seventh coil 115g is connected to the sixteenth and twenty-fifth segments 16, 25, and the eighth coil 115h is connected to the nineteenth and twenty-eighth segments 19, 28. The ninth coil 115 i is connected to the twenty-second and first segments 22, 1, and the tenth coil 115 j is connected to the twenty-fifth and fourth segments 25, 4.

  Incidentally, every other segment 1, 4,..., 28 is also used in this embodiment, and connection to the segments 1, 4,..., 28 and winding around teeth (not shown) In this case, the first to tenth coils 115a to 115j are configured by alternately repeating “concentrated winding”. In the present embodiment, the coils 115a to 115j are wound every two teeth (every two coils) over the entire coils 115a to 115j, so that one winding 109 is not cut. All of the coils 115a to 115j are configured to be wound. In this case, the segments 1, 4,..., 28 connected between the two coils 115a to 115j that are continuously wound are centered in the circumferential direction between the teeth around which the coils 115a to 115j are wound. Located in. In the present embodiment, all of the coils 115a to 115j are connected in series so as to form one closed loop.

Next, features of this embodiment will be described below.
(1) Also in the DC machine 101b of this embodiment, as described in (1) of the first embodiment, an even number that becomes an odd number when the number of magnetic poles P of the magnet 105 that is a field pole is divided by "2". The coil number C of the coils 115a to 115j is an even number “10” that does not become an integral multiple of the magnetic pole number P of the magnet 105, and the number of segments of the commutator 116 is 30 ((the number of magnetic poles P × The number of coils is C) / 2). Also, in the DC machine 101b of the present embodiment, the coils 115a to 115j are configured by concentrated winding around the teeth (not shown), and the coils 115a to 115j are all connected in series so as to form one closed loop. The coils 115a to 115j are connected so that the number of parallel circuits between the pair of anode-side and cathode-side brushes 111a to 111f to which power is supplied is “2”. Therefore, the DC machine 101b of this embodiment can also be configured with high performance.

  (2) The coils 115a to 115j of the present embodiment are configured by alternately repeating the connection of the commutator 116 to the predetermined segments 1, 4,... Is. The coils 115a to 115j wound around the teeth and the coils 115a to 115j wound around the next tooth sandwiching the connection to the segments 1, 4,. Every other). That is, the number obtained by adding “1” is less than half of the number of coils C of the coils 115a to 115j and the number of coils C is set to an even number that cannot be divided. 115a to 115j can be wound. Therefore, the winding work of the coils 115a to 115j can be facilitated.

  (3) In this embodiment, the segments 1, 4,..., 28 connected between the two coils 115a to 115j that are wound continuously are between the teeth around which the coils 115a to 115j are wound. Located in the center in the circumferential direction. If it does in this way, the connection structure of coil 115a-115j will become simple, and the winding operation | work of coil 115a-115j can be made easier.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 6 shows a development view of the DC machine 101c of this embodiment. The DC machine 101c of this embodiment includes 10 magnets 117, 8 armature coils (first to eighth coils) 118a to 118h, and 40 segments (first to 40th segments) 1 to 40. A commutator 119 having 10 and ten brushes (first to tenth brushes) 120a to 120j.

The magnets 117 are disposed and fixed at equal angular (36 °) intervals on the inner peripheral surface of a yoke (not shown).
The first coil 118a is connected to the 35th and 10th segments 35 and 10, and the second coil 118b is connected to the 40th and 15th segments 40 and 15. The third coil 118c is connected to the fifth and twentieth segments 5 and 20, and the fourth coil 118d is connected to the tenth and 25th segments 10 and 25. The fifth coil 118e is connected to the fifteenth and thirtieth segments 15 and 30, and the sixth coil 118f is connected to the twentieth and thirty-fifth segments 20 and 35. The seventh coil 118g is connected to the 25th and 40th segments 25 and 40, and the eighth coil 118h is connected to the 30th and 5th segments 30 and 5.

  Incidentally, every fourth segment 5, 10,..., 40 is used in the present embodiment, and connection to the segments 5, 10,..., 40 and winding around a tooth (not shown) (in this case) , Concentrated winding) are alternately repeated to form first to eighth coils 118a to 118h. In the present embodiment, the coils 118a to 118h are wound every two teeth (every two coils) over the entire coils 118a to 118h, so that one winding 109 is not cut. All of the coils 118a to 118h are configured to be wound. In this case, the segments 5, 10,..., 40 connected between the two coils 118a to 118h wound continuously are the center in the circumferential direction between the teeth around which the coils 118a to 118h are wound. Located in. In this embodiment, all of the coils 118a to 118h are connected in series so as to form one closed loop.

The first to tenth brushes 120 a to 120 j are arranged at equiangular (36 °) intervals so that the center line in the width direction (circumferential direction) coincides with the center line in the circumferential direction of each magnet 117.
Next, features of this embodiment will be described below.

  (1) Also in the DC machine 101c of this embodiment, as described in (1) of the first embodiment, an even number that becomes an odd number when the number P of the magnetic poles of the magnet 117 that is the field pole is divided by “2”. “10”, the number of coils C of the coils 118a to 118h is an even number “8” that is not an integral multiple of the number of magnetic poles P of the magnet 117, and the number of segments of the commutator 119 is 40 ((number of magnetic poles P × The number of coils is C) / 2). Also, in the DC machine 101c of this embodiment, the coils 118a to 118h are configured by concentrated winding on teeth (not shown), and the coils 118a to 118h are all connected in series so as to form one closed loop. The coils 118a to 118h are connected so that the number of parallel circuits between the pair of anode-side and cathode-side brushes 120a to 120j supplying power is “2”. Therefore, the DC machine 101c of this embodiment can also be configured with high performance.

  (2) The coils 118a to 118h according to the present embodiment are configured by alternately repeating the connection of the commutator 119 to the predetermined segments 5, 10,..., 40 and winding it around predetermined teeth (not shown). Is. Then, the coils 118a to 118h wound around the teeth and the coils 118a to 118h wound around the next tooth sandwiching the connection to the segments 5, 10,. Every other). That is, since the number obtained by adding “1” is equal to or less than half of the number C of coils 118a to 118h and the number C of coils is not evenly divided, all coils can be cut without cutting one winding 109. 118a-118h can be wound. Therefore, the winding work of the coils 118a to 118h can be facilitated.

  (3) In the present embodiment, the segments 5, 10,..., 40 connected between the two coils 118a to 118h wound continuously are between the teeth around which the coils 118a to 118h are wound. Located in the center in the circumferential direction. If it does in this way, the connection structure of coil 118a-118h will become simple, and the winding operation | work of coil 118a-118h can be made easier.

(Fifth embodiment)
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. In addition, about the structure similar to the said embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 7 shows a development view of the DC machine 101d of the present embodiment. The DC machine 101d of the present embodiment includes 10 magnets 117, 12 armature coils (first to twelfth coils) 121a to 121l, and 60 segments (first to 60th segments) 1 to 60. And 10 brushes (first to tenth brushes) 120a to 120j.

  The first coil 121a is connected to the 50th and 15th segments 50 and 15, and the second coil 121b is connected to the 55th and 20th segments 55 and 20. The third coil 121c is connected to the 60th and 25th segments 60 and 25, and the fourth coil 121d is connected to the fifth and 30th segments 5 and 30. The fifth coil 121e is connected to the 10th and 35th segments 10, 35, and the sixth coil 121f is connected to the 15th and 40th segments 15, 40. The seventh coil 121g is connected to the 20th and 45th segments 20 and 45, and the eighth coil 121h is connected to the 25th and 50th segments 25 and 50. The ninth coil 121i is connected to the 30th and 55th segments 30 and 55, and the tenth coil 121j is connected to the 35th and 60th segments 35 and 60. The eleventh coil 121k is connected to the 40th and fifth segments 40 and 5, and the twelfth coil 121l is connected to the 45th and 10th segments 45 and 10.

  In this embodiment, every fourth segment 5, 10,..., 60 is used in this embodiment, and the connection to the segments 5, 10,. In this case, the first to twelfth coils 121a to 121l are configured by alternately repeating “concentrated winding”. In the present embodiment, the coils 121a to 121l are wound every four teeth (every four coils) throughout the coils 121a to 121l, so that one winding 109 is not cut. All of the coils 121a to 121l are configured to be wound. In this case, the segments 5, 10,..., 60 connected between the two coils 121a to 121l wound continuously are the center in the circumferential direction between the teeth around which the coils 121a to 121l are wound. Located in. In the present embodiment, all of the coils 121a to 121l are connected in series so as to form one closed loop.

Next, features of this embodiment will be described below.
(1) Also in the DC machine 101d of the present embodiment, as described in (1) of the first embodiment, an even number that becomes an odd number when the number P of the magnetic poles of the magnet 117 that is the field pole is divided by “2”. The coil number C of the coils 121a to 121l is an even number “12” that is not an integral multiple of the magnetic pole number P of the magnet 117, and the number of segments of the commutator 122 is 60 ((the number of magnetic poles P × The number of coils is C) / 2). Also, in the DC machine 101d of the present embodiment, the coils 121a to 121l are configured by concentrated winding around the teeth (not shown), and the coils 121a to 121l are all connected in series so as to form one closed loop. The coils 121a to 121l are connected so that the number of parallel circuits between the pair of anode-side and cathode-side brushes 120a to 120j supplying power is “2”. Therefore, the DC machine 101d of this embodiment can also be configured with high performance.

  (2) The coils 121a to 121l of the present embodiment are configured by alternately repeating the connection of the commutator 122 to the predetermined segments 5, 10,..., 60 and winding around predetermined teeth (not shown). Is. The coils 121a to 121l wound around the teeth and the coils 121a to 121l wound around the next tooth sandwiching the connection to the segments 5, 10,. Every other). That is, since the number obtained by adding “1” is equal to or less than half of the number of coils C of the coils 121a to 121l and the number of coils C is not evenly divided, all coils can be cut without cutting one winding 109. 121a to 121l can be wound. Therefore, the winding work of the coils 121a to 121l can be facilitated.

  (3) In this embodiment, the segments 5, 10,..., 60 connected between the two coils 121a to 121l that are wound continuously are between the teeth around which the coils 121a to 121l are wound. Located in the center in the circumferential direction. In this way, the connection structure of the coils 121a to 121l is simplified, and the winding work of the coils 121a to 121l can be made easier.

Each embodiment of the present invention may be modified as follows.
O The connection with each segment 1-24 of the short circuit lines 113a-113h used in the said 2nd Embodiment is not restricted to this, You may change suitably. Further, although the short-circuit wires 113a to 113h are configured using a part of the winding 109, they may be configured using a short-circuit plate formed of a metal plate. In addition, if this short circuit board is formed in a ring shape or a circular arc shape, and it penetrates the rotating shaft 103a and it is comprised so that it may laminate | stack in an axial direction, it can comprise compactly. Moreover, you may apply short circuit members, such as a short circuit wire and a short circuit board, to DC machine 101b-101d of 3rd-5th embodiment. In this way, the number of brushes of the DC machines 101b to 101d of the third to fifth embodiments can be reduced.

  In the first and second embodiments, the number of magnetic poles P of the magnet (field magnetic pole) is “6” and the number of coils C of the armature coil is “8”. In the third embodiment, the number of magnets (field magnetic pole) The number of magnetic poles P is “6”, the number of coils C of the armature coil is “10”, and in the fourth embodiment, the number of magnetic poles P of the magnet (field magnetic pole) is “10” and the number of coils C of the armature coil is “ In the fifth embodiment, the number of magnetic poles P of the magnet (field magnetic pole) is “10” and the number of coils C of the armature coil is “12”. The number P of magnetic poles and the number C of coils are not limited to this, and may be changed as appropriate. That is, the number of magnetic poles P of the magnet (field magnetic pole) is “6” or more and divided by “2” to be an even number that is an odd number, and the number C of armature coils is “8” or more and the number of magnetic poles P of the field pole is P. As long as it is an even number that does not become an integral multiple of, it may be changed appropriately.

In each of the above embodiments, the magnets 105 and 117 are used as field poles, but a field pole using coils may be used.
The technical idea that can be grasped from each of the above embodiments will be described below.

  (A) The field pole is a magnet.

The schematic block diagram for demonstrating the DC machine of 1st Embodiment. The expanded view of the DC machine of 1st Embodiment. The expanded view of the DC machine of 2nd Embodiment. Explanatory drawing for demonstrating the connection of the winding of the DC machine of 2nd Embodiment. The expanded view of the DC machine of 3rd Embodiment. The expanded view of the DC machine of 4th Embodiment. The expanded view of the DC machine of 5th Embodiment.

Explanation of symbols

  1 to 24, 1 to 30, 1 to 40, 1 to 60 ... segment, 102 ... stator, 103 ... armature, 105 ... magnet as field pole, 108 ... commutator, 110a to 110h ... as armature coil 1st-8th coil, 111a-111f ... 1st-6th brush as a brush, 112a-112h ... 1st-8th coil as an armature coil, 113a-113h ... 1st-8th as a short circuit member Short circuit wire, 114a, 114b ... 1st, 2nd brush as brush, 115a-115j ... 1st-10th coil as armature coil, 116 ... Commutator, 117 ... Magnet as field pole, 118a-118h ... 1st-8th coil as an armature coil, 119 ... Commutator, 120a-120j ... 1st-10th brush as a brush, 121a-121l ... Armature first to twelfth coil as a coil, 122 ... commutator, P ... magnet poles as magnetic poles of the field poles, number of coils of C ... armature coils.

Claims (2)

A stator having a plurality of field poles;
An armature having a commutator composed of a plurality of segments, and winding a plurality of armature coils connected to a predetermined segment around an armature core;
An anode-side and cathode-side brush that is in sliding contact with the commutator segment to supply power;
A DC machine equipped with
The number of magnetic poles of the field pole is “6”,
The number of coils of the armature coil is “8”,
The number of segments of the commutator is “24”,
The armature coil is configured by concentrated winding on the teeth of the armature core, all the armature coils are connected in series so as to form one closed loop, and the number of parallel circuits between the brushes is “2”. The armature coil is connected so that
The plurality of armature coils are configured such that the connection of the commutator to a predetermined segment and the winding to the predetermined tooth are alternately repeated without winding being wound and wound on all the armature coils. And
The windings are connected to adjacent segments before and after winding on the predetermined teeth, three segments positioned at 120 ° intervals are short-circuited by short-circuit lines, and short-circuit lines are set for all segments. And
The DC machine according to claim 1, wherein all the armature coils and all the short-circuit wires are connected without being cut. In the DC machine according to claim 1,
The three segments are composed of two segments connected to the short-circuit line and the armature coil, and one segment connected only to the short-circuit line between the two segments. DC machine.

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