JP2014128153A

JP2014128153A - Electric motor

Info

Publication number: JP2014128153A
Application number: JP2012284653A
Authority: JP
Inventors: Tadashi Yamashita; 忠司山下; Atsushi Yamashita; 淳山下
Original assignee: Nissin Kogyo Co Ltd
Current assignee: Nissin Kogyo Co Ltd
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2014-07-07

Abstract

PROBLEM TO BE SOLVED: To provide an electric motor which consumes a small amount of electric power and is small in size.SOLUTION: A first lead wire 37 is wound around a third slot 23 counterclockwise, for example, 18 times (in nine stages as a first layer, and nine stages as a second layer). Then, a second lead wire 39 is wound on the first lead wire 37 clockwise, for example, 15 times (in eight stages as a third layer, counted in an accumulated manner, and seven stages as a forth layer). Since the numbers of windings are differentiated, the length of the second lead wire 39 becomes close to that of the first lead wire 37. Thus, the first and second lead wires have the same or almost the same length. Therefore, difference in resistance values of the first and second lead wires can be minimized, and power consumption can be decreased.

Description

本発明は、電動モータ、特に巻線が工夫されている電動モータに関する。 The present invention relates to an electric motor, and more particularly to an electric motor in which a winding is devised.

電動モータは、固定子と回転子とからなるが、両方が電磁石であるものと一方が電磁石で他方が永久磁石であるものなど、各種の形態の直流モータが実用化されてきた（例えば、特許文献１（図３）参照。）。 An electric motor is composed of a stator and a rotor, and various types of DC motors have been put into practical use, such as those in which both are electromagnets, one is an electromagnet, and the other is a permanent magnet (for example, patents). Reference 1 (FIG. 3).)

特許文献１の図３に示されるように、ステータコア（１１）（括弧付き数字は、特許文献１に記載された符号を示す。以下同様）に、コイル（Ｕ１ａ）が巻かれ、このコイル（Ｕ１ａ）にコイル（Ｕ１ｂ）が巻かれ、このコイル（Ｕ１ｂ）にコイル（Ｕ１ｃ）が巻かれている。コイル（Ｕ１ａ）は黒丸で表示され、巻数は７である。コイル（Ｕ１ｂ）は白丸で表示され、巻数は７である。コイル（Ｕ１ｃ）は斜線入り白丸で表示され、巻数は７である。 As shown in FIG. 3 of Patent Document 1, a coil (U1a) is wound around a stator core (11) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same applies hereinafter), and this coil (U1a ) Is wound with a coil (U1b), and this coil (U1b) is wound with a coil (U1c). The coil (U1a) is indicated by a black circle and the number of turns is seven. The coil (U1b) is indicated by a white circle and the number of turns is seven. The coil (U1c) is indicated by a hatched white circle and the number of turns is seven.

巻径×巻数＝巻線の長さの算式で、コイルの長さが求められる。コイル（Ｕ１ａ）よりコイル（Ｕ１ｂ）の巻径が大きいため、コイル（Ｕ１ｂ）の巻線の長さが大きくなる。同様に、コイル（Ｕ１ｂ）よりコイル（Ｕ１ｃ）の巻径が大きいため、コイル（Ｕ１ｃ）の巻線の長さが大きくなる。 The coil length is obtained by the formula of winding diameter × number of turns = winding length. Since the winding diameter of the coil (U1b) is larger than that of the coil (U1a), the length of the winding of the coil (U1b) is increased. Similarly, since the winding diameter of the coil (U1c) is larger than that of the coil (U1b), the length of the coil (U1c) is increased.

コイルの抵抗値は、コイルの線径や材質が同一であれば、長さに比例して増加する。すると、コイル（Ｕ１ａ）よりコイル（Ｕ１ｂ）の抵抗値が大きくなり、コイル（Ｕ１ｂ）よりコイル（Ｕ１ｃ）の抵抗値が大きくなる。
抵抗値が異なると電流波形が歪になり、消費電力が増える。
省エネルギーが求められる中、消費電力の少ない電動モータが望まれる。 If the wire diameter and material of the coil are the same, the resistance value of the coil increases in proportion to the length. Then, the resistance value of the coil (U1b) becomes larger than that of the coil (U1a), and the resistance value of the coil (U1c) becomes larger than that of the coil (U1b).
If the resistance value is different, the current waveform is distorted and the power consumption increases.
While energy saving is required, an electric motor with low power consumption is desired.

特開２００４−２９７８８１公報JP 2004-297881 A

本発明は、より消費電力の少ない電動モータを提供することを課題とする。 An object of the present invention is to provide an electric motor with less power consumption.

請求項１に係る発明は、回転子の複数のスロットに、各々導線が巻かれている電動モータにおいて、前記スロットに第１導線が巻かれ、この第１導線の上に第２導線が巻かれ、前記第１導線の巻数に対して前記第２導線の巻数が少なく設定されていることを特徴とする。 According to the first aspect of the present invention, in the electric motor in which the conductive wires are wound around the plurality of slots of the rotor, the first conductive wire is wound around the slots, and the second conductive wire is wound on the first conductive wire. The number of turns of the second conductor is set smaller than the number of turns of the first conductor.

請求項１に係る発明は、請求項１記載の電動モータにおいて、
この電動モータは、永久磁石からなる固定子と、回転子と、この回転子と共に回転し複数のセグメントからなる整流子と、この整流子に摺接する給電ブラシとを備え、
給電ブラシの総数は４であり、回転子の回転方向に沿って陽極ブラシが２個配置され、次に陰極ブラシが２個配置され、
固定子の磁極数は、給電ブラシの数より多く配置され、セグメントの数は、スロットの数の２倍に設定され、
第１導線は偶数番目のセグメントに結線され、第２導線は奇数番目のセグメントに結線されることを特徴とする。 The invention according to claim 1 is the electric motor according to claim 1,
The electric motor includes a stator made of a permanent magnet, a rotor, a commutator that rotates together with the rotor and is made of a plurality of segments, and a power supply brush that is in sliding contact with the commutator,
The total number of power supply brushes is 4, two anode brushes are arranged along the rotation direction of the rotor, then two cathode brushes are arranged,
The number of magnetic poles of the stator is arranged more than the number of power supply brushes, the number of segments is set to twice the number of slots,
The first conductor is connected to the even-numbered segment, and the second conductor is connected to the odd-numbered segment.

請求項３に係る発明は、請求項１又は請求項２記載の電動モータにおいて、スロットに巻かれている第１導線の長さと、第１導線の上に巻かれている第２導線の長さが同一又はほぼ同一であることを特徴とする。 The invention according to claim 3 is the electric motor according to claim 1 or 2, wherein the length of the first conductor wound around the slot and the length of the second conductor wound around the first conductor. Are the same or substantially the same.

請求項１に係る発明では、第１導線の巻数に対して、巻径が大きな第２導線の巻数を少なくしたので、抵抗値の差を小さくすることができる。これにより、電流波形の歪を抑え、消費電力の低減を図ることができる。 In the invention which concerns on Claim 1, since the winding number of the 2nd conducting wire with a large winding diameter with respect to the winding number of the 1st conducting wire was decreased, the difference of resistance value can be made small. Thereby, distortion of the current waveform can be suppressed and power consumption can be reduced.

請求項２に係る発明では、請求項１の効果に加えて、次の効果が発揮される。すなわち、導線をスロットの各々に集中巻きすることにした。隣り合う導線が重なる心配がないので、モータ軸方向への導線の張り出しは僅かであり、モータケースの小型化が可能となる。 In the invention according to claim 2, in addition to the effect of claim 1, the following effect is exhibited. That is, the conductive wire is concentratedly wound around each slot. Since there is no concern that adjacent conductors overlap, the extension of the conductor in the motor shaft direction is slight, and the motor case can be downsized.

請求項３に係る発明では、第１導線の長さと第２導線の長さを、同一又はほぼ同一にしたので、抵抗値の差を極力小さくすることができ、より消費電力の低減を図ることができる。 In the invention which concerns on Claim 3, since the length of the 1st conducting wire and the length of the 2nd conducting wire were made the same or substantially the same, the difference of resistance value can be made as small as possible, and reduction of power consumption can be aimed at more. Can do.

本発明の電動モータにおける固定子の正面図である。It is a front view of the stator in the electric motor of the present invention. 本発明の電動モータにおける回転子及び整流子の正面図である。It is a front view of the rotor and commutator in the electric motor of the present invention. 本発明に係る電動モータの要部正面図である。It is a principal part front view of the electric motor which concerns on this invention. 第１導線の巻き方を説明する図である。It is a figure explaining how to wind the 1st conducting wire. 第１導線が巻かれた第３スロットの正面図である。It is a front view of the 3rd slot by which the 1st conducting wire was wound. 第２導線の巻き方を説明する図である。It is a figure explaining how to wind the 2nd conducting wire. 第２導線が巻かれた第３スロットの正面図である。It is a front view of the 3rd slot by which the 2nd conducting wire was wound. 本発明に係る電動モータの要部展開図である。It is a principal part expanded view of the electric motor which concerns on this invention. 巻径の説明図である。It is explanatory drawing of a winding diameter. 導線の周長を説明する図である。It is a figure explaining the circumference of conducting wire.

本発明の実施の形態を添付図に基づいて以下に説明する。 Embodiments of the present invention will be described below with reference to the accompanying drawings.

図３で本発明の係る電動モータの正面図（ただし要部）を示すが、この図の理解を容易にするために、先に図１で固定子を説明し、図２で回転子及び整流子を説明する。 FIG. 3 shows a front view (however, the main part) of the electric motor according to the present invention. In order to facilitate understanding of this figure, the stator is first described with reference to FIG. Explain the child.

図１に示すように、固定子１０は、回転子（図２、符号２０）を囲うように環状に配置される６個の永久磁石１１〜１６からなる。
図２に示すように、回転子２０は、第１〜第８スロット２１〜２８を備え、これらの第１〜第８スロット２１〜２８に、後述する第１・第２導線が巻かれる。
回転子２０と一緒に回転する整流子２９には、第１〜第１６セグメントが等ピッチで配置されている。 As shown in FIG. 1, the stator 10 includes six permanent magnets 11 to 16 arranged in an annular shape so as to surround the rotor (FIG. 2, reference numeral 20).
As shown in FIG. 2, the rotor 20 includes first to eighth slots 21 to 28, and first and second conductors described later are wound around the first to eighth slots 21 to 28.
The commutator 29 that rotates together with the rotor 20 has first to sixteenth segments arranged at equal pitches.

第１セグメントは図面奥へ延びる導体の帯であり、一端（奥端）が切り起こされて、係止部２９ａとされる。この係止部２９ａに後述する導線（コイル）を絡めるなどして結線することができる。第２〜第１６セグメントも同様に係止部２９ａを有する。 The first segment is a conductor band extending to the back of the drawing, and one end (back end) is cut and raised to form a locking portion 29a. A wire (coil), which will be described later, is entangled with the engaging portion 29a and can be connected. Similarly, the second to sixteenth segments also have locking portions 29a.

図３に示すように、電動モータＭは、永久磁石１１〜１６からなる固定子１０と、複数のスロット２１〜２８を有する回転子２０と、複数のセグメントからなる整流子２９と、この整流子２９に摺接する給電ブラシ３０とを備える。
給電ブラシ３０は、時計廻りに整流子２９を囲うように配置される２本の陽極ブラシ３１、３２及び２本の陰極ブラシ３３、３４からなる。
永久磁石１１〜１６及びブラシ３１〜３４は、非回転部材であり、回転子２０及び整流子２９は、回転部材である。 As shown in FIG. 3, the electric motor M includes a stator 10 composed of permanent magnets 11 to 16, a rotor 20 having a plurality of slots 21 to 28, a commutator 29 composed of a plurality of segments, and the commutator. The power supply brush 30 is in sliding contact with the power supply brush 29.
The power supply brush 30 includes two anode brushes 31 and 32 and two cathode brushes 33 and 34 arranged so as to surround the commutator 29 in the clockwise direction.
The permanent magnets 11 to 16 and the brushes 31 to 34 are non-rotating members, and the rotor 20 and the commutator 29 are rotating members.

図３では、回転中心３５より左側に陽極ブラシ３１、３２が配置され、回転中心３５より右側に陰極ブラシ３３、３４が配置される。図示せぬ陽極側ターミナルが陽極ブラシ３１、３２の近傍に配置され、同様に、図示せぬ陰極側ターミナルが陰極ブラシ３３、３４の近傍に配置される。陽極側ターミナルと陰極側ターミナルが干渉する心配がないため、陽極側ターミナル及び陰極側ターミナルの形状を簡略化できる。 In FIG. 3, anode brushes 31 and 32 are arranged on the left side of the rotation center 35, and cathode brushes 33 and 34 are arranged on the right side of the rotation center 35. An anode terminal (not shown) is arranged in the vicinity of the anode brushes 31 and 32, and similarly, a cathode terminal (not shown) is arranged in the vicinity of the cathode brushes 33 and 34. Since there is no fear that the anode side terminal and the cathode side terminal interfere with each other, the shapes of the anode side terminal and the cathode side terminal can be simplified.

従来のある電動モータ（特開２０１１−１９９９８７公報、図１１）はスロットの数が２６で、セグメントの数も２６である。この従来に比較して本発明では、スロットの数及びセグメントの数を大幅に低減できる。結果、電動モータＭの低コスト化や小型化が図れる。 A conventional electric motor (Japanese Patent Laid-Open No. 2011-199987, FIG. 11) has 26 slots and 26 segments. Compared to this conventional technique, the present invention can greatly reduce the number of slots and the number of segments. As a result, the cost and size of the electric motor M can be reduced.

なお、永久磁石１１〜１６の数（磁極数）とスロット２１〜２８の数とセグメントの数が大きいほど、円滑な回転性能が得られる。数の組み合わせは表１に示すものが実施可能である。 In addition, smooth rotation performance is acquired, so that the number of permanent magnets 11-16 (the number of magnetic poles), the number of slots 21-28, and the number of segments are large. The combinations shown in Table 1 can be implemented.

パターン１〜２が、本発明の電動モータＭに採用できる。すなわち、磁極数の数はブラシの数４より多い６が採用でき、スロットの数は８、１０が採用でき、セグメントの数はスロットの数の２倍であればよい。 Patterns 1 and 2 can be employed in the electric motor M of the present invention. In other words, the number of magnetic poles can be 6, which is larger than the number of brushes 4, and the number of slots can be 8, 10. The number of segments only needs to be twice the number of slots.

次に、導線の巻き方について説明する。
図４（ａ）に示すように、第１導線３７は、第２セグメントを出発し、第２スロット２２に巻かれ、第８セグメントに結線され、この第８セグメントを出発し、第５スロット２５に巻かれ、第１４セグメントに結線され、この第１４セグメントを出発し、第８スロット２８に巻かれ図４（ｂ）に続く。 Next, how to wind the conducting wire will be described.
As shown in FIG. 4A, the first conducting wire 37 starts from the second segment, is wound around the second slot 22, is connected to the eighth segment, and starts from the eighth segment, and then enters the fifth slot 25. 4 and connected to the fourteenth segment, starting from the fourteenth segment, wound on the eighth slot 28 and continuing to FIG. 4B.

図４（ｂ）に示すように、第１導線３７は、第４セグメントに結線され、この第４セグメントを出発し、第３スロット２３に巻かれ、第１０セグメントに結線され、この第１０セグメントを出発し、第６スロット２６に巻かれ、第１６セグメントに結線され、この第１６セグメントを出発し、図４（ｃ）に続く。 As shown in FIG. 4 (b), the first conductor 37 is connected to the fourth segment, starts from the fourth segment, is wound around the third slot 23, and is connected to the tenth segment. 4 is wound around the sixth slot 26 and connected to the sixteenth segment. The sixteenth segment is started and continues to FIG. 4 (c).

図５に示すように、第４セグメントを出発した第１導線３７は、第３スロット２３に、左回りに例えば１８回（第１層目が９段、第２層目が９段）巻かれる（集中巻きされる）。他のスロットについても同様。その後、第１導線３７は第１０セグメントに結線される。この結線は、絡める、巻き付ける、接合する、挟める、嵌める、の何れでもよく、電気的接続が達成できれば手法は任意である。 As shown in FIG. 5, the first conducting wire 37 starting from the fourth segment is wound around the third slot 23 counterclockwise, for example, 18 times (9 layers for the first layer and 9 layers for the second layer). (Concentrated winding). The same applies to the other slots. Thereafter, the first conducting wire 37 is connected to the tenth segment. This connection may be entangled, wound, joined, pinched, or fitted, and the method is arbitrary as long as electrical connection can be achieved.

図４（ｃ）に示すように、第１導線３７は、第１スロット２１に巻かれ、第６セグメントに結線され、この第６セグメントを出発し、第４スロット２４に巻かれ、第１２セグメントに結線され、この第１２セグメントを出発し、第７スロット２７に巻かれ、第２セグメントに結線される。
第１導線３７は、モータ軸廻りを３周させることで、第１〜第８スロット２１〜２８の全てに各々１８回程度集中巻きされる。 As shown in FIG. 4 (c), the first conducting wire 37 is wound around the first slot 21, connected to the sixth segment, starts from the sixth segment, is wound around the fourth slot 24, and the twelfth segment. Is connected to the second segment, wound around the seventh slot 27, and connected to the second segment.
The first conductive wire 37 is concentrated and wound about 18 times in all of the first to eighth slots 21 to 28 by making three rotations around the motor shaft.

次に、図６（ａ）に示すように、第２導線３９は、第１セグメントを出発し、第３スロット２３に巻かれ、第７セグメントに結線され、この第７セグメントを出発し、第６スロット２６に巻かれ、第１３セグメントに結線され、この第１３セグメントを出発し、図６（ｂ）に続く。 Next, as shown in FIG. 6A, the second conductor 39 starts from the first segment, is wound around the third slot 23, is connected to the seventh segment, and starts from the seventh segment. It is wound around 6 slots 26, connected to the 13th segment, starts from this 13th segment, and continues to FIG. 6 (b).

図７に示すように、第１セグメントを出発した第２導線３９は、第１導線３７の上に、右回りに例えば１５回（累積で第３層目が８段、第４層目が７段）巻かれる（集中巻きされる）。他のスロットについても同様。その後、第２導線３９は第７セグメントに結線される。 As shown in FIG. 7, the second conductor 39 starting from the first segment is, for example, 15 times clockwise on the first conductor 37 (cumulative third layer is 8 steps, fourth layer is 7 steps). Step) Wound (concentrated). The same applies to the other slots. Thereafter, the second conducting wire 39 is connected to the seventh segment.

図６（ｂ）に示すように、第２導線３９は、第１スロット２１に巻かれ、第３セグメントに結線され、この第３セグメントを出発し、第４スロット２４に巻かれ、第９セグメントに結線され、この第９セグメントを出発し、第７スロット２７に巻かれ、第１５セグメントに結線され、この第１５セグメントを出発し、図６（ｃ）に続く。 As shown in FIG. 6 (b), the second conductor 39 is wound around the first slot 21, connected to the third segment, starts from the third segment, is wound around the fourth slot 24, and the ninth segment. 6 starts from the ninth segment, is wound around the seventh slot 27, is connected to the fifteenth segment, starts from the fifteenth segment, and continues to FIG. 6 (c).

図６（ｃ）に示すように、第２導線３９は、第２スロット２２に巻かれ、第５セグメントに結線され、この第５セグメントを出発し、第５スロット２５に巻かれ、第１１セグメントに結線され、この第１１セグメントを出発し、第８スロット２８に巻かれ、第１セグメントに結線される。
第２導線３９は、モータ軸廻りを３周させることで、第１〜第８スロット２１〜２８の全てに、各々１５回程度集中巻きされる。 As shown in FIG. 6 (c), the second conductive wire 39 is wound around the second slot 22, connected to the fifth segment, starts from the fifth segment, is wound around the fifth slot 25, and the eleventh segment. Is connected to the first segment, wound around the eighth slot 28, and connected to the first segment.
The second conducting wire 39 is concentrated and wound about 15 times in all of the first to eighth slots 21 to 28 by making three rotations around the motor shaft.

以上に述べた図４（ａ）〜（ｃ）と図６（ａ）〜（ｃ）を重ねると、図８に示すように、第１導線３７と第２導線３９が巻かれた電動モータＭが得られる。 When the above-described FIGS. 4A to 4C and FIGS. 6A to 6C are overlapped, as shown in FIG. 8, the electric motor M in which the first conductor 37 and the second conductor 39 are wound. Is obtained.

次に、第１導線３７と第２導線３９の巻数について説明する。
第３スロット２３に、第１導線３７を２層巻きし、その上に第２導線３９を２層巻きした形態は、図９に示す模式図で表すことができる。導線３７、３９の線径はｄとする。 Next, the number of turns of the first conducting wire 37 and the second conducting wire 39 will be described.
A form in which the first conductive wire 37 is wound in two layers on the third slot 23 and the second conductive wire 39 is wound in two layers thereon can be represented by a schematic diagram shown in FIG. The wire diameter of the conducting wires 37 and 39 is d.

図９に示すように、第１層目３７Ａが、幅寸法ａである第３スロット２３に巻かれると、第１層目３７Ａの巻径は（ａ＋ｄ）となる。第２層目３７Ｂは、第１層目３７Ａに０．５ピッチずれて巻かれる。そのため、第２層目３７Ｂの巻径は（ａ＋（１＋ルート３）ｄ）となる。
同様に、第３層目３９Ａの巻径は（ａ＋（１＋２×ルート３）ｄ）となり、第４層目３９Ｂの巻径は（ａ＋（１＋３×ルート３）ｄ）となる。 As shown in FIG. 9, when the first layer 37A is wound around the third slot 23 having the width dimension a, the winding diameter of the first layer 37A is (a + d). The second layer 37B is wound around the first layer 37A with a shift of 0.5 pitch. Therefore, the winding diameter of the second layer 37B is (a + (1 + route 3) d).
Similarly, the winding diameter of the third layer 39A is (a + (1 + 2 × route 3) d), and the winding diameter of the fourth layer 39B is (a + (1 + 3 × route 3) d).

図１０に示すように、第３スロット２３の断面寸法をａ、ｂとする。
図１０（ａ）において、第１層目３７Ａの周長は、２×（ａ＋ｂ＋２ｄ）となる。第１層目３７Ａの巻数（段数）をｍ１とすると、第１層目３７Ａの長さは、ｍ１×２×（ａ＋ｂ＋２ｄ）となる。すなわち、第１層目３７Ａ〜第４層目３９Ｂの長さ（導線の長さ）は、次表の通りである。 As shown in FIG. 10, the sectional dimensions of the third slot 23 are a and b.
In FIG. 10A, the circumference of the first layer 37A is 2 × (a + b + 2d). When the number of turns (the number of steps) of the first layer 37A is m1, the length of the first layer 37A is m1 × 2 × (a + b + 2d). That is, the lengths of the first layer 37A to the fourth layer 39B (the lengths of the conductive wires) are as shown in the following table.

仮に、ｄ＝１、ａ＝１０、ｂ＝２０（単位は全てｍｍであるが、記載が煩雑になるため、表示は省略した。以下同様。）、ｍ１＝９、ｍ２＝９とすれば、
第１層目３７Ａの長さと第２層目３７Ｂの長さの和は、９×２×（１０＋２０＋２×１）＋９×２×（１０＋２０＋２（１＋ルート３）×１）＝５７６＋６３８＝１２１４となる。 Temporarily, d = 1, a = 10, b = 20 (the units are all mm, but the description is omitted because the description is complicated. The same applies hereinafter), and if m1 = 9 and m2 = 9,
The sum of the length of the first layer 37A and the length of the second layer 37B is 9 × 2 × (10 + 20 + 2 × 1) + 9 × 2 × (10 + 20 + 2 (1 + route 3) × 1) = 576 + 638 = 1214.

仮にｍ３＝８、ｍ４＝７とすれば、
第３層目３９Ａの長さと第４層目３９Ｂの長さの和は、８×２×（１０＋２０＋２（１＋２×ルート３）×１）＋７×２×（１０＋２０＋２（１＋３×ルート３）×１）＝６２３＋５９３＝１２１６となる。 If m3 = 8 and m4 = 7,
The sum of the length of the third layer 39A and the length of the fourth layer 39B is 8 × 2 × (10 + 20 + 2 (1 + 2 × route 3) × 1) + 7 × 2 × (10 + 20 + 2 (1 + 3 × route 3) × 1) = 623 + 593 = 1216.

第１層目３７Ａの長さと第２層目３７Ｂの長さの和（第１導線の長さ）が１２１４で、第３層目３９Ａの長さと第４層目３９Ｂの長さの和（第２導線の長さ）が１２１６であるため、第１導線の長さと第２導線の長さは、同一又はほぼ同一となる。 The sum of the length of the first layer 37A and the length of the second layer 37B (the length of the first conductor) is 1214, and the sum of the length of the third layer 39A and the length of the fourth layer 39B (first Since the length of the two conductors is 1216, the length of the first conductor and the length of the second conductor are the same or substantially the same.

第１導線の巻数（この例では１８）に対して第２導線の巻数（この例では１５）を少なくすることにより、第１導線の長さと第２導線の長さを、同一又はほぼ同一にしたので、抵抗値の差を極力小さくすることができ、より消費電力の低減を図ることができる。
なお、巻数ｍ１〜ｍ４は、上記例に限るものではなく、適宜変更することができる。 By reducing the number of turns of the second conductor (15 in this example) relative to the number of turns of the first conductor (18 in this example), the length of the first conductor and the length of the second conductor are the same or substantially the same. Therefore, the difference in resistance value can be reduced as much as possible, and the power consumption can be further reduced.
The number of turns m1 to m4 is not limited to the above example, and can be changed as appropriate.

本発明は、直流モータに好適である。 The present invention is suitable for a DC motor.

Ｍ…電動モータ、１０…固定子、１１〜１６…永久磁石、２０…回転子、２１〜２８…第１〜第８スロット、２９…整流子、３０…給電ブラシ、３１、３２…陽極ブラシ、３３、３４…陰極ブラシ、３７…第１導線、３９…第２導線。 M ... Electric motor, 10 ... Stator, 11-16 ... Permanent magnet, 20 ... Rotor, 21-28 ... First to eighth slots, 29 ... Commutator, 30 ... Feeding brush, 31, 32 ... Anode brush, 33, 34 ... cathode brush, 37 ... first conductor, 39 ... second conductor.

Claims

In the electric motor in which the conductive wires are wound around the plurality of slots of the rotor,
A first conductive wire is wound on the slot, a second conductive wire is wound on the first conductive wire, and the number of turns of the second conductive wire is set smaller than the number of turns of the first conductive wire. Electric motor.

The electric motor according to claim 1, wherein
The electric motor includes a stator made of a permanent magnet, the rotor, a commutator made of a plurality of segments that rotate together with the rotor, and a power supply brush that is in sliding contact with the commutator.
The total number of the power supply brushes is 4, two anode brushes are arranged along the rotation direction of the rotor, and then two cathode brushes are arranged,
The number of magnetic poles of the stator is more than the number of the power supply brushes, the number of the segments is set to be twice the number of the slots,
The electric motor is characterized in that the first conductive wire is connected to the even-numbered segments and the second conductive wire is connected to the odd-numbered segments.

In the electric motor according to claim 1 or 2,
The electric motor characterized in that the length of the first conducting wire wound in the slot and the length of the second conducting wire wound on the first conducting wire are the same or substantially the same.