JP2014222978A - On-vehicle rotary electric machine, and structure of bobbin and stator core of motor system - Google Patents
On-vehicle rotary electric machine, and structure of bobbin and stator core of motor system Download PDFInfo
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- JP2014222978A JP2014222978A JP2013101789A JP2013101789A JP2014222978A JP 2014222978 A JP2014222978 A JP 2014222978A JP 2013101789 A JP2013101789 A JP 2013101789A JP 2013101789 A JP2013101789 A JP 2013101789A JP 2014222978 A JP2014222978 A JP 2014222978A
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- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims 4
- 239000012212 insulator Substances 0.000 claims 4
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000011109 contamination Methods 0.000 abstract description 14
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 10
- 230000004907 flux Effects 0.000 description 7
- 238000003466 welding Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
本発明は、車載用回転電機及びモータシステムに用いるステータコアとボビンの嵌合構造に関するものである。
The present invention relates to a stator core and bobbin fitting structure used in a vehicle-mounted rotating electrical machine and a motor system.
従来の技術として、以下の３件の文献がある。特許文献１、２、３では、ステータコア内径側のティース形状が直線部で構成され角部がエッジ状になる形状が開示されている。特許文献２では、ステータコア内径側のティース隙間とボビン内径側の壁で構成された凹部がある形状が開示されている。また、特許文献２、３においては、隣り合うステータコアの内径側にあるティース隙間において、ボビンが隣接しているが、ロータコア側へと通じる隙間がある形状が開示されている。特許文献３では、ステータコア内径側のティース部とボビンの嵌合面において、ティース形状が直線部で構成された角部形状にならって嵌合された、ボビン構造が開示されている。
There are the following three documents as conventional techniques. Patent Documents 1, 2, and 3 disclose a shape in which a tooth shape on the inner diameter side of the stator core is configured by a straight portion and a corner portion is an edge shape. Patent Document 2 discloses a shape having a recess composed of a teeth gap on the stator core inner diameter side and a bobbin inner diameter side wall. Patent Documents 2 and 3 disclose a shape in which a bobbin is adjacent to a tooth gap on the inner diameter side of adjacent stator cores but has a gap leading to the rotor core side. Patent Document 3 discloses a bobbin structure in which a tooth shape is fitted in a fitting shape between a tooth portion on an inner diameter side of a stator core and a bobbin in accordance with a corner shape formed by a straight portion.
これらの特許文献１、２、３に記載のものは、ステータコア内径側のティース形状が直線部で構成され角部がエッジ状になる構造が開示されている。ティース形状の角部がエッジ状になると、エッジ形状にならって嵌合されたボビン形状となり、特許文献３の記載図に示された形状となる。そのため、ステータコアとボビンとの挿入性が悪くなる要因があり、挿入時においてもステータコアのエッジ部とボビン嵌合面との干渉でコンタミが発生することが考えられる。また、ステータコアとボビンが嵌合された状態で振動などによる衝撃を受けた際にはステータコアのエッジ部でボビン嵌合面が破損することが考えられる。更に、内径側のティース形状を直線部を繋げて構成しているため、内径側のティース形状をＲで繋げて構成するよりもティース形状の断面積が多くなっている。そのためインダクタンスの増加に繋がり、モータのN-T特性の悪化要因となっている事が考えられる。
特許文献２に記載のものは、ステータコア内径側のティース隙間とボビン内径側の壁で構成された凹部がある形状が開示されている。ティース隙間とボビン内径側の壁で構成された凹部は、コンタミなどの異物が引っ掛りやすくなり、モータロックの発生要因となる事が考えられる。
また、特許文献２、３に記載のものは、隣り合うステータコアの内径側にあるティース隙間において、ボビンが隣接しているが、ロータコア側へと通じる隙間がある形状が開示されている。ティース隙間において、ロータコア側へと通じる隙間から導電性異物などのコンタミが巻線エリア内に侵入し、コイル被覆の破損及びコイル同士を短絡させてしまう事が考えられる。また、ティース隙間を近接させてコンタミ浸入を防止させる方法も考えられるが、そうした場合には、漏れ磁束による主磁束低減によるモータ特性の悪化要因となる事が考えられる。
These patent documents 1, 2, and 3 disclose a structure in which the tooth shape on the inner diameter side of the stator core is formed of a straight portion and the corner portion is formed in an edge shape. When the corner portion of the tooth shape becomes an edge shape, a bobbin shape fitted according to the edge shape is obtained, and the shape shown in the drawing of Patent Document 3 is obtained. Therefore, there is a factor that the insertability between the stator core and the bobbin is deteriorated, and it is conceivable that contamination occurs due to interference between the edge portion of the stator core and the bobbin fitting surface even at the time of insertion. In addition, when the stator core and the bobbin are fitted, the bobbin fitting surface may be damaged at the edge of the stator core when subjected to an impact due to vibration or the like. Furthermore, since the teeth shape on the inner diameter side is formed by connecting the straight portions, the cross-sectional area of the teeth shape is larger than that formed by connecting the teeth shape on the inner diameter side with R. This leads to an increase in inductance, which may be a cause of deterioration of the NT characteristics of the motor.
The thing of patent document 2 is disclosing the shape with the recessed part comprised by the teeth clearance gap by the side of a stator core inner diameter side, and the wall by the side of a bobbin inner diameter side. The recess formed by the tooth gap and the inner wall of the bobbin is likely to catch foreign matter such as contamination, which may cause a motor lock.
Moreover, the thing of patent document 2, 3 discloses the shape in which the bobbin is adjacent to the tooth gap on the inner diameter side of the adjacent stator core but has a gap leading to the rotor core side. It is conceivable that in the tooth gap, contaminants such as conductive foreign matter enter the winding area from the gap leading to the rotor core side, damage the coil coating and short-circuit the coils. In addition, a method of preventing the intrusion of contamination by bringing the teeth gap close to each other is conceivable, but in such a case, it may be a cause of deterioration of the motor characteristics due to the reduction of the main magnetic flux due to the leakage magnetic flux.
そこで、本発明ではステータコア内径側のティース形状を２つのRで構成し、角部がエッジ形状ではなくRで接続された滑らかな形状とし、ボビンの形状もRで接続された滑らかな嵌合面とする事で、ティース角部のエッジとの干渉を無くし、ステータコアとボビンとの挿入性改善と挿入時のコンタミ発生を防止する。また、ステータとボビンが嵌合された状態では振動などによる衝撃を受けても鋭利な角部が無く、応力集中の発生要因を無くす事ができるため、ボビンの樹脂厚みを薄く設計することができ、巻線の占積率を向上させる事ができる。更に、内径側のティース形状を２つのＲで構成しているため、直線で内径側のティース形状を構成するよりも隣り合うティース間の隙間を大きくする事ができ、漏れインダクタンスを減らす事ができる。そのため、モータのN-T特性を向上させる事ができる。
また、隣り合うステータコアの内径側にあるティース隙間において、ボビン内壁を互いに隣接させ、ロータコア側へと通じる隙間を塞ぐ事で、巻線エリア内への導電性異物などの浸入防止と適切なティース隙間を確保する事ができ、漏れ磁束を無くす事ができる。
更に、ステータコアの内径とボビン内径を同径として、ボビン内壁を互いに隣接させると、ティース隙間とボビン内径側の壁で構成された凹部を無くす事ができ、コンタミなどの引っ掛りを抑制とモータロック発生を防止する事ができる。
Therefore, in the present invention, the tooth shape on the inner diameter side of the stator core is composed of two Rs, and the corners are not the edge shape but a smooth shape connected by R, and the bobbin shape is also a smooth fitting surface connected by R. This eliminates interference with the edges of the teeth corners, improves insertability between the stator core and the bobbin, and prevents contamination during insertion. In addition, when the stator and bobbin are fitted, there is no sharp corners even when subjected to shocks due to vibrations, etc., and the cause of stress concentration can be eliminated, so the resin thickness of the bobbin can be designed thin. The space factor of the winding can be improved. Furthermore, since the teeth shape on the inner diameter side is composed of two Rs, the gap between adjacent teeth can be made larger than the straight teeth shape on the inner diameter side, and leakage inductance can be reduced. . As a result, the NT characteristics of the motor can be improved.
In addition, in the tooth gap on the inner diameter side of the adjacent stator core, the bobbin inner walls are adjacent to each other, and the gap leading to the rotor core side is blocked to prevent intrusion of conductive foreign substances into the winding area and an appropriate tooth gap. Can be ensured, and leakage magnetic flux can be eliminated.
Furthermore, if the inner diameter of the stator core is the same as the inner diameter of the bobbin and the inner walls of the bobbin are adjacent to each other, the recess formed by the teeth gap and the inner wall of the bobbin can be eliminated, and the motor locks and prevents the contamination from being caught. Occurrence can be prevented.
本発明によれば、ステータコア内径側のティース形状を２つのRで構成させ、ティース角部をRで接続された滑らかな形状とし、ボビンの嵌合形状もそれにならったRで接続された滑らかな面とする事で、ステータコアとボビンとの挿入性改善と挿入時のコンタミ発生を防止する。また、ステータとボビンの嵌合時に振動などによる衝撃を受けても嵌合面に鋭利な角部が無いため、応力集中の発生要因を無くす事ができ、ボビンの割れや欠けを防止する効果があり、ボビンの樹脂厚みを薄く設計することができ、巻線の占積率を向上させる事ができる。また、内径側のティース形状が２つのＲで構成されているため、直線でティース形状を構成するより、隣り合うティース間の隙間を大きくする事ができ、ティース断面積を少なくできる。そのためモータのN-T特性を向上させることができる。更に隣り合うステータコアの内径側にあるティース隙間を埋めるように、ボビン内壁を互いに隣接させてロータコア側へと通じる隙間を塞ぐ事で、巻線エリア内への導電性異物などの侵入防止と適切なティース隙間を確保する事ができ、漏れ磁束を無くす事ができる。また、ステータコアの内径とボビン内径を同径として、ボビン内壁を互いに隣接させる事で、ティース隙間とボビン内径側の壁で構成された凹部を無くし、コンタミなどの引っ掛りを抑制とモータロックの発生を防止する。
According to the present invention, the tooth shape on the stator core inner diameter side is composed of two Rs, the tooth corners are smoothly connected with R, and the bobbin fitting shape is also smoothly connected with R according to it. By using the surface, it is possible to improve the insertability between the stator core and the bobbin and prevent contamination during insertion. In addition, since there are no sharp corners on the mating surface even when the stator and bobbin are subjected to impacts due to vibrations, the cause of stress concentration can be eliminated and the effect of preventing cracking and chipping of the bobbin can be eliminated. Yes, the resin thickness of the bobbin can be designed to be thin, and the space factor of the winding can be improved. Further, since the tooth shape on the inner diameter side is composed of two Rs, the gap between adjacent teeth can be increased and the cross-sectional area of the teeth can be reduced as compared with the case where the tooth shape is formed with a straight line. Therefore, the NT characteristic of the motor can be improved. Furthermore, by closing the gap that leads to the rotor core side by making the bobbin inner walls adjacent to each other so as to fill the teeth gap on the inner diameter side of the adjacent stator core, it is possible to prevent the intrusion of conductive foreign matters into the winding area. Teeth clearance can be secured and leakage magnetic flux can be eliminated. In addition, by making the inner diameter of the stator core and the inner diameter of the bobbin the same diameter, the inner wall of the bobbin is adjacent to each other, thereby eliminating the recess formed by the tooth gap and the wall on the inner diameter side of the bobbin, suppressing the catching of contamination, etc. and generating the motor lock To prevent.
本発明の実施例について図１〜図７を用いて説明する。
本発明の一実施例である、電動パワーステアリング用モータを用いてボビン及びステータの構造について説明していく。図１は電動パワーステアリングモータの軸方向断面図を示したものである。先ず、全体の構成について説明する。ハウジング１の内周側には分割コアで構成されたステータコア２が、溶接または溶接レスでリング形状を保持し圧入または焼嵌めされている。このステータコア２にはボビン３が取り付けられ、その外周部にコイル４が巻かれている。コイル４の口出し線はバスバーモールドＡ １４に設けられたバスバーターミナル１５に接続され、バスバーターミナル１５の端面は、別のバスバーモールドＢ １６に設けられたバスバーターミナル１７の端面と溶接により接続される。ステータコア２の内周側には、シャフト５、ロータコア６、磁石７、磁石カバー８から構成される回転子が設けられており、回転子はFベアリング９及びRベアリング１０により支持され、Fベアリング９はハウジング１にトメワ１２で固定され、Rベアリング１０は予圧ばね１１と共にカバーモータ１３にそれぞれ固定される。カバーモータ１３はハウジング１に圧入または焼嵌めで固定される。また、カバーモータ１３は貫通穴が設けられバスバーターミナル１５が通っており、ねじ１８によりバスバーモールド１６と接続される。更に、バスバーターミナル１７は各相の接続を3相出力できるように配線され、UVWの３相出力となっている。この3相出力端子１９にインバータから電力を給電することでモータは回転する。
An embodiment of the present invention will be described with reference to FIGS.
The structure of the bobbin and the stator will be described using an electric power steering motor which is an embodiment of the present invention. FIG. 1 is an axial sectional view of an electric power steering motor. First, the overall configuration will be described. A stator core 2 formed of a split core is press-fitted or shrink-fitted while maintaining a ring shape without welding or welding on the inner peripheral side of the housing 1. A bobbin 3 is attached to the stator core 2 and a coil 4 is wound around the outer periphery thereof. The lead wire of the coil 4 is connected to the bus bar terminal 15 provided in the bus bar mold A14, and the end surface of the bus bar terminal 15 is connected to the end surface of the bus bar terminal 17 provided in another bus bar mold B16 by welding. A rotor including a shaft 5, a rotor core 6, a magnet 7, and a magnet cover 8 is provided on the inner peripheral side of the stator core 2, and the rotor is supported by an F bearing 9 and an R bearing 10. Is fixed to the housing 1 with a tome 12 and the R bearing 10 is fixed to the cover motor 13 together with the preload spring 11. The cover motor 13 is fixed to the housing 1 by press fitting or shrink fitting. The cover motor 13 is provided with a through hole, through which the bus bar terminal 15 passes, and is connected to the bus bar mold 16 by a screw 18. Furthermore, the bus bar terminal 17 is wired so that the connection of each phase can be output in three phases, and is a UVW three-phase output. The motor rotates by supplying power from the inverter to the three-phase output terminal 19.
次に、図２を用いてハウジング１内部の構成について説明する。最外周にはステータコア２が配置されている。ステータコア２はT型の分割コアで構成されており、2つのティースに1つのコイル４が集中的に巻かれる2連続巻線構造となっている。各ステータコア２はコアバック外周部で溶接により連結される。 Next, the internal structure of the housing 1 will be described with reference to FIG. The stator core 2 is disposed on the outermost periphery. The stator core 2 is composed of a T-shaped split core, and has a two-continuous winding structure in which one coil 4 is intensively wound around two teeth. Each stator core 2 is connected to the outer periphery of the core back by welding.
図３（ａ）にステータコア２を連結させボビン３を嵌合させた状態の正面図を、図３（ｂ）にステータコア２を連結させボビン３を嵌合させた状態の斜視図を示す。組付けは、ステータコア２の軸方向からボビン３が２個反転されるように挿入される。ステータコア２、ボビン３が嵌合したものは巻線され(図示せず)同形状のものがリング状に１２個連結し(２個連結した状態を図示)組付けられる。ステータコア２とボビン３が１２個リング状に連結して組付けられると、隣り合うボビン外壁３ｄとボビン内壁３ｅが嵌合し、ボビン嵌合面３ａ ３ｂの隙間を無くし、巻線エリア内へのコンタミ侵入を防止する事ができる。また、適切なティース隙間２ａを確保する事ができ漏れ磁束を無くす事ができる。 FIG. 3A shows a front view of the state where the stator core 2 is connected and the bobbin 3 is fitted, and FIG. 3B shows a perspective view of the state where the stator core 2 is connected and the bobbin 3 is fitted. Assembling is performed such that two bobbins 3 are reversed from the axial direction of the stator core 2. The stator core 2 and the bobbin 3 fitted are wound (not shown), and 12 of the same shape are connected in a ring shape (two connected states are shown) and assembled. When twelve stator cores 2 and bobbins 3 are connected and assembled in a ring shape, the adjacent bobbin outer wall 3d and bobbin inner wall 3e are fitted, eliminating the gap between the bobbin fitting surfaces 3a and 3b, and into the winding area. Contamination can be prevented. Further, it is possible to secure an appropriate tooth gap 2a and to eliminate leakage magnetic flux.
図４（ａ）にステータコア２を連結させボビン３を嵌合させた状態の側面図を、図４（ｂ）に図４（ａ）の断面図を示す。ステータコア２とボビン３の内径側の嵌合形状には、第１Ｒ ２ｃ、第２Ｒ ２ｂと接続Ｒ ２ｄが設けられている。これにより、ステータコア２にボビン３を挿入する際の嵌合部に鋭利な角部が無く、ボビン３の挿入を容易に行う事ができ、ボビン３挿入時のコンタミ発生を抑制する事ができる。更に、ステータコア２とボビン３が嵌合した状態で、円周方向に振動などによる衝撃が発生しても、ステータコア２とボビン３の嵌合部には鋭利な角部が無いため、応力集中の発生要因を無くす事ができ、ボビンの割れや欠けを防止できる。また、内径側のティース形状を２つのＲで構成しているため、直線で構成した内径側のティース形状よりもティース断面積を少なくでき、モータのN-T特性を向上させることができる。ティース隙間２ａにおいては、若干の凹部３ｃが有り、コンタミが引っ掛る要因があるため、ボビン３の形状を変更して改善した実施例を図６（ａ）以降の記載図を用いて後述の実施例説明文に記載する。 FIG. 4A shows a side view of the stator core 2 connected and the bobbin 3 fitted, and FIG. 4B shows a cross-sectional view of FIG. 4A. The fitting shape on the inner diameter side of the stator core 2 and the bobbin 3 is provided with a first R 2c, a second R 2b, and a connection R 2d. Thereby, there is no sharp corner in the fitting portion when the bobbin 3 is inserted into the stator core 2, the bobbin 3 can be easily inserted, and the occurrence of contamination when the bobbin 3 is inserted can be suppressed. Further, even if an impact due to vibration or the like occurs in the circumferential direction in a state where the stator core 2 and the bobbin 3 are fitted, the fitting portion between the stator core 2 and the bobbin 3 does not have a sharp corner, so stress concentration is reduced. The generation factor can be eliminated and the bobbin can be prevented from cracking or chipping. Further, since the tooth shape on the inner diameter side is constituted by two Rs, the cross-sectional area of the tooth can be reduced as compared with the tooth shape on the inner diameter side constituted by a straight line, and the NT characteristic of the motor can be improved. In the tooth gap 2a, there is a slight recess 3c and there is a cause of contamination. Therefore, an embodiment improved by changing the shape of the bobbin 3 will be described later with reference to the drawings after FIG. Enter in the example description.
図５にステータコア２とボビン３の嵌合形状の拡大図を示す。前述で述べたステータコア２とボビン３の内径側の嵌合形状である第１Ｒ ２ｃ、第２Ｒ ２ｂと接続Ｒ ２ｄについて詳細に説明する。まず第１Ｒ ２ｃを形成する上で、巻線スペースと磁気飽和のバランスから本実施例ではティース幅２eを略6.0mmとしている。また、第１Ｒ ２ｃは磁気飽和の抑制とトルクリプルを低減するため、ティース幅２eと接触するR寸法を略R11.3としている。第２Ｒ ２ｂはコギングトルク抑制と漏れ磁束を無くすため、バランスの良いティース隙間２ａが略1.2mmとなるようティース内径Rと第１Ｒ ２ｃが接触するR寸法を略R1.75として２つのRが接続する接続R ２dを設けて、ステータコア２とボビン３の内径側の嵌合形状である第１Ｒ ２ｃ、第２Ｒ ２ｂと接続Ｒ ２ｄを構成している。前述で述べたように嵌合形状である第１Ｒ ２ｃと第２Ｒ ２ｂの寸法関係は第１Ｒ ２ｃ＞第２Ｒ ２ｂとなるようにしている。好ましくは第１Ｒ ２ｃのR寸法は第２Ｒ ２ｂのR寸法に対して約6.4〜6.5倍程度が良い。 FIG. 5 shows an enlarged view of the fitting shape of the stator core 2 and the bobbin 3. The first R 2c, the second R 2b, and the connection R 2d, which are the fitting shapes on the inner diameter side of the stator core 2 and the bobbin 3 described above, will be described in detail. First, in forming the first R 2c, the tooth width 2e is set to about 6.0 mm in this embodiment from the balance of the winding space and magnetic saturation. In addition, in order to suppress magnetic saturation and reduce torque ripple in the first R 2c, the R dimension in contact with the tooth width 2e is set to approximately R11.3. In order to suppress cogging torque and eliminate leakage magnetic flux, the second R 2b connects the two Rs with the R dimension where the tooth inner diameter R and the first R 2c are in contact with each other so that the well-balanced tooth gap 2a is approximately 1.2 mm. The connection R 2d is provided, and the first R 2c, the second R 2b, and the connection R 2d, which are fitting shapes on the inner diameter side of the stator core 2 and the bobbin 3, are configured. As described above, the dimensional relationship between the first R 2c and the second R 2b, which are fitting shapes, is such that first R 2c> second R 2b. Preferably, the R dimension of the first R 2c is about 6.4 to 6.5 times the R dimension of the second R 2b.
図６（ａ）にステータコア２を連結させボビン３を嵌合させた状態の正面図を、図６（ｂ）にステータコア２を連結させボビン３を嵌合させた状態の斜視図を示す。組付けは、前述で述べた実施例と同様にステータコア２の軸方向からボビン３が２個反転されるように挿入される。ステータコア２、ボビン３が嵌合したものは巻線され(図示せず)同形状のものがリング状に１２個連結し(２個連結した状態を図示)組付けられる。ステータコア２とボビン３が１２個リング状に連結して組付けられると、隣り合うボビン外壁３ｄとボビン内壁３ｅが嵌合し、ボビン嵌合面３ａ ３ｂの隙間を無くし、巻線エリア内へのコンタミ侵入を防止する事ができる。また、適切なティース隙間２ａを確保する事ができ漏れ磁束を無くす事ができる。 FIG. 6A is a front view of the state where the stator core 2 is connected and the bobbin 3 is fitted, and FIG. 6B is a perspective view of the state where the stator core 2 is connected and the bobbin 3 is fitted. The assembly is inserted so that two bobbins 3 are inverted from the axial direction of the stator core 2 in the same manner as in the above-described embodiment. The stator core 2 and the bobbin 3 fitted are wound (not shown), and 12 of the same shape are connected in a ring shape (two connected states are shown) and assembled. When twelve stator cores 2 and bobbins 3 are connected and assembled in a ring shape, the adjacent bobbin outer wall 3d and bobbin inner wall 3e are fitted, eliminating the gap between the bobbin fitting surfaces 3a and 3b, and into the winding area. Contamination can be prevented. Further, it is possible to secure an appropriate tooth gap 2a and to eliminate leakage magnetic flux.
図７（ａ）にステータコア２を連結させボビン３を嵌合させた状態の側面図を、図７（ｂ）に図７（ａ）の断面図を示す。ステータコア２とボビン３の内径側の嵌合形状には、前述で述べた実施例と同様に第１Ｒ ２ｃ、第２Ｒ ２ｂと接続Ｒ ２ｄが設けられている。これにより、ステータコア２にボビン３を挿入する際の嵌合部に鋭利な角部が無く、ボビン３の挿入を容易に行う事ができ、ボビン３挿入時のコンタミ発生を抑制する事ができる。更に、ステータコア２とボビン３が嵌合した状態で、円周方向に振動などによる衝撃が発生しても、ステータコア２とボビン３の嵌合部には鋭利な角部が無いため、応力集中の発生要因を無くす事ができ、ボビンの割れや欠けを防止できる。また、内径側のティース形状においても第１Ｒ ２ｃ、第２Ｒ ２ｂと接続Ｒ ２ｄで構成しているため、直線で構成した内径側のティース形状よりもティース断面積を少なくでき、モータのN-T特性を向上させることができる。また、本実施例では前述の実施例で述べたティース隙間２ａにおいて、ステータコア２の内径寸法とボビン３の内径寸法を同一径となるように改善した。これにより、ステータコア２とボビン３を嵌合させると、前述の実施例で述べた若干の凹部３ｃを無くす事ができ、コンタミが引っ掛る要因を無くす事ができる。更に、図示したように内径側で隣り合うボビン３の接触部を面で合わせた部分を設ける事でコイル４の巻線用溝として使う事もできる。
FIG. 7A shows a side view of the state where the stator core 2 is connected and the bobbin 3 is fitted, and FIG. 7B shows a cross-sectional view of FIG. The fitting shape on the inner diameter side of the stator core 2 and the bobbin 3 is provided with the first R 2c, the second R 2b, and the connection R 2d as in the above-described embodiment. Thereby, there is no sharp corner in the fitting portion when the bobbin 3 is inserted into the stator core 2, the bobbin 3 can be easily inserted, and the occurrence of contamination when the bobbin 3 is inserted can be suppressed. Further, even if an impact due to vibration or the like occurs in the circumferential direction in a state where the stator core 2 and the bobbin 3 are fitted, the fitting portion between the stator core 2 and the bobbin 3 does not have a sharp corner, so stress concentration is reduced. The generation factor can be eliminated and the bobbin can be prevented from cracking or chipping. Also, since the tooth shape on the inner diameter side is constituted by the first R 2c, the second R 2b, and the connection R 2d, the tooth cross-sectional area can be reduced as compared with the tooth shape on the inner diameter side constituted by a straight line, and the NT characteristics of the motor can be reduced. Can be improved. Further, in this embodiment, the inner diameter dimension of the stator core 2 and the inner diameter dimension of the bobbin 3 are improved in the tooth gap 2a described in the above-described embodiment. As a result, when the stator core 2 and the bobbin 3 are fitted together, the slight recesses 3c described in the above-described embodiments can be eliminated, and the cause of contamination can be eliminated. Further, as shown in the figure, it is possible to use as a winding groove of the coil 4 by providing a portion where the contact portions of the adjacent bobbins 3 on the inner diameter side are aligned with each other.
本発明は、電動パワーステアリングモータに用いられるブラシレスモータや各種発電機等の車載用回転電機及びモータシステムのボビン及びステータ構造として利用することができる。
INDUSTRIAL APPLICABILITY The present invention can be used as a bobbin and a stator structure of an in-vehicle rotating electrical machine such as a brushless motor and various generators used in an electric power steering motor and a motor system.
１00…車載用電動機、１…ハウジング、２…ステータコア、２ａ…ティース隙間、２ｂ…第２Ｒ、２ｃ…第１Ｒ、２ｄ…接続Ｒ、２e…ティース幅、３…ボビン、３ａ…ボビン嵌合面、３ｂ…ボビン嵌合面、３ｃ…凹部、３ｄ…ボビン外壁、３ｅ…ボビン内壁、４…コイル、４ａ…コイル口出し線、５…シャフト、６…ロータコア、７…磁石、８…磁石カバー、９…Fベアリング、１０…Rベアリング、１１…予圧ばね、１２…トメワ、１３…カバーモータ、１４…バスバーモールドＡ、１５…バスバーターミナル、１６…バスバーモールドＢ、１７…バスバーターミナル、１８…ねじ、１９…３相出力端子 100 ... Motor for on-vehicle use, 1 ... housing, 2 ... stator core, 2a ... tooth gap, 2b ... 2nd R, 2c ... 1st R, 2d ... connection R, 2e ... teeth width, 3 ... bobbin, 3a ... bobbin fitting surface, 3b ... Bobbin fitting surface, 3c ... concave, 3d ... bobbin outer wall, 3e ... bobbin inner wall, 4 ... coil, 4a ... coil lead wire, 5 ... shaft, 6 ... rotor core, 7 ... magnet, 8 ... magnet cover, 9 ... F bearing, 10 ... R bearing, 11 ... Preload spring, 12 ... Tomewa, 13 ... Cover motor, 14 ... Busbar mold A, 15 ... Busbar terminal, 16 ... Busbar mold B, 17 ... Busbar terminal, 18 ... Screw, 19 ... 3-phase output terminal
Claims (6)
A rotating electrical machine used for in-vehicle use, wherein a stator core and a coil are insulated from each other. .
The stator core structure according to claim 1, wherein the stator core and the coil are insulated with a bobbin made of a resin or an insulator, a stator core integrated with the stator core, or insulating paper, and the like. Stator core and insulation structure of motor system.
In the insulating structure according to claim 2, following the shape of the tip of the teeth on the inner diameter side of the stator core configured by a curve, the shape of the fitting portion of the insulator such as resin and the stator core is configured by a curve and has no edge. A stator core and an insulating structure of an in-vehicle rotating electrical machine and a motor system.
An in-vehicle rotating electrical machine and a motor characterized in that, when the stator core and the insulator are arranged adjacent to each other in a circumferential shape in the insulating structure according to claim 2, the tooth gap in the stator core is appropriately secured and the tooth gap is closed. System stator core and insulation structure.
5. The in-vehicle rotation according to claim 4, wherein the inner diameter of the stator core and the inner diameter of the bobbin made of resin or insulator or the one molded integrally with the stator core are substantially the same. Stator core and insulation structure for electric and motor systems.
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| JP2013101789A JP2014222978A (en) | 2013-05-14 | 2013-05-14 | On-vehicle rotary electric machine, and structure of bobbin and stator core of motor system |
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| JP2013101789A JP2014222978A (en) | 2013-05-14 | 2013-05-14 | On-vehicle rotary electric machine, and structure of bobbin and stator core of motor system |
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| JP2020171134A (en) * | 2019-04-03 | 2020-10-15 | 日立金属株式会社 | Radial gap type rotary electric machine, method for manufacturing radial gap type rotary electric machine, and magnetic type gear |
| FR3127655A1 (en) * | 2021-09-30 | 2023-03-31 | Valeo Systèmes D’Essuyage | Stator body for electric motor, stator, electric motor and related manufacturing method |
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| WO2023052604A1 (en) * | 2021-09-30 | 2023-04-06 | Valeo Systèmes d'Essuyage | Stator body for an electric motor, stator, electric motor, and associated manufacturing method |
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