WO2016084184A1 - 回転電機及び回転電機の製造方法 - Google Patents
回転電機及び回転電機の製造方法 Download PDFInfo
- Publication number
- WO2016084184A1 WO2016084184A1 PCT/JP2014/081342 JP2014081342W WO2016084184A1 WO 2016084184 A1 WO2016084184 A1 WO 2016084184A1 JP 2014081342 W JP2014081342 W JP 2014081342W WO 2016084184 A1 WO2016084184 A1 WO 2016084184A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- aluminum
- wire
- solder
- rotating electrical
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
- H02K15/0062—Manufacturing the terminal arrangement per se; Connecting the terminals to an external circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/02—Windings characterised by the conductor material
Definitions
- the present invention relates to a rotating electrical machine and a method for manufacturing the rotating electrical machine.
- the rotating electrical machine is provided with a copper terminal that electrically connects the terminal line of the stator coil and the external power supply line.
- the corrosion of different metals caused by the electrode potential difference between the metals will occur.
- the aluminum wire having a low electrode potential is corroded.
- means for joining the stator coil and the copper terminal adopting aluminum wire for example, means for joining solder using a solder material containing zinc having a small electrode potential difference from aluminum, and Means that suppress corrosion by preventing moisture from entering are employed.
- the joining means of the aluminum wire and the copper terminal is subjected to a plurality of processes such as a crimping process for obtaining conductivity, a soldering process for preventing intrusion of water and a process for providing a sealing material.
- a crimping process for obtaining conductivity
- a soldering process for preventing intrusion of water
- a process for providing a sealing material By passing through these steps, the electrical conductivity between the aluminum wire and the copper terminal is ensured, and further, the water stopping property is secured.
- the joint portion includes the crimping portion, the soldering portion, the sealing material, and the like, the productivity of the rotating electrical machine is reduced and the manufacturing cost is increased.
- the present invention has been made to solve the above-described problems, and a rotating electrical machine and a rotating machine capable of improving productivity while more reliably avoiding corrosion of a joint portion between a copper terminal and a terminal wire. It aims at providing the manufacturing method of an electric machine.
- a rotating electrical machine includes a stator around which an aluminum wire having a resin coating layer formed thereon is wound, and a rotatable rotor disposed inside the stator.
- Power supply used to supply power to rotate the exposed aluminum part and the rotor, and the stator has an exposed aluminum part where the resin coating layer is peeled off and the aluminum core wire is exposed.
- a wire is attached and formed on the terminal so as to cover the entire surface of the exposed aluminum part and the terminal used for electrical conduction between the exposed aluminum part and the power supply line, and joins the exposed aluminum part and the terminal. And a first solder layer.
- soldering is performed so as to cover the entire surface of the portion of the terminal wire from which the resin film layer has been peeled off, corrosion of the joint portion with the terminal wire is more reliably performed. It can be avoided. Moreover, by this soldering, both ensuring of electrical conductivity and ensuring of water stopping properties can be realized, and productivity can be improved.
- FIG. 1 is a cross-sectional view of a rotating electrical machine 100 according to the present embodiment.
- FIG. 2 is a cross-sectional view of a state in which a propeller fan 12 as a driven machine is connected to the rotating electrical machine 100 shown in FIG.
- An example of a schematic configuration of the rotating electrical machine 100 will be described with reference to FIGS. 1 and 2.
- the rotating electrical machine 100 according to the present embodiment is provided with an improvement that can more reliably suppress corrosion of the joint portion between the copper terminal and the terminal wire of the stator coil while improving productivity. .
- the rotating electrical machine 100 has a cylindrical stator 2 and includes a motor housing 4 in which a housing space for housing the rotor 3 is formed.
- the motor housing 4 includes a bottomed cylindrical casing 5 and a bracket cover 10 including a bearing housing 6 and a sheet metal cover 9 that cover the opening side of the casing 5.
- the motor housing 4 is obtained by integrally molding the casing 5 and the stator 2 with a mold resin so that the inner peripheral surface of the stator 2 is exposed on the inner surface of the casing 5.
- the rotor 3 is arranged inside the stator 2 so that the outer peripheral surface thereof faces the inner peripheral surface of the stator 2.
- the stator 2 and the rotor 3 are arranged on the same axis.
- the rotor 3 is connected to the shaft 7 by press fitting. Further, the tip of the shaft 7 is connected to the propeller fan 12.
- the shaft 7 is rotatably supported by the motor housing 4 via a pair of bearings 8.
- the pair of bearings 8 are held by a bearing holding portion. Specifically, one bearing 8 a is attached to the bottom wall portion of the casing 5.
- the other bearing 8 b is attached to a resin bearing housing 6 attached to the bracket cover 10.
- a thermosetting resin such as unsaturated polyester can be employed.
- the rotating electrical machine 100 is provided with a printed board 11 on which a Hall element that detects the magnetic pole position of the rotor 3 is mounted.
- the printed circuit board 11 is fixed to the printed circuit board holder, for example, by welding.
- the printed circuit board holder is disposed, for example, between the end face of the rotor 3 and the bearing housing 6.
- FIG. 3 is a perspective view of the stator 2 before being molded in the rotating electrical machine 100 according to the present embodiment.
- FIG. 4 is an enlarged view of the outer peripheral side portion of the stator 2 before molding of the rotating electrical machine 100 according to the present embodiment. The configuration of the stator 2 before resin molding will be described with reference to FIGS.
- the stator 2 of the rotating electrical machine 100 includes a stator core 13, an insulator 14 fitted to the stator core 13, and a coil 15 wound around the insulator 14.
- the stator core 13 can be configured by, for example, arranging a plurality of magnetic pole pieces in an annular shape.
- the insulator 14 is used for insulation between adjacent coils 15.
- the coil 15 is an aluminum wire having an aluminum core wire and a resin film layer formed on the surface of the aluminum core wire.
- the resin film layer of the terminal wire 15a is peeled, and the aluminum core wire is exposed.
- the portion where the aluminum core wire is exposed corresponds to the aluminum exposed portion 16a.
- the aluminum exposed portion 16a is joined to a terminal 17 described later with a first solder described later.
- the coil 15 having a diameter of, for example, 0.9 mm or more is employed.
- the stator 2 of the rotating electrical machine 100 includes a terminal 17 that is fixed at a preset position on the insulator 14.
- the terminal 17 is joined to the aluminum exposed portion 16a of the terminal wire 15a from which the resin coating layer has been peeled off, and to a power supply line (not shown) that is used to supply power for rotating the rotor 3.
- the terminal 17 is a member used for electrical conduction between the terminal line 15a and the power supply line.
- the power supply line is connected to an external power source that operates the rotating electrical machine 100.
- the terminal 17 includes a base portion 17A connected to the insulator 14, a power supply line connection portion 17a with which a power supply line is entangled, and a terminal line connection portion 17b with which the terminal line 15a of the coil 15 is entangled. .
- the terminal 17 is made of a copper material so that the electric resistance is reduced.
- a power supply line connecting portion 17a is formed on the side opposite to the side connected to the insulator 14.
- a terminal line connecting portion 17b is connected to the peripheral portion of the base portion 17A.
- the terminal line connecting portion 17b is formed so as to extend from the connection position of the peripheral portion of the base portion 17A to the side where the diameter of the stator 2 is increased.
- a hole into which the power supply line is inserted is formed in the power supply line connecting portion 17a.
- a flag-type terminal is provided on the power supply line, and the flag-type terminal is inserted into the hole of the power supply line connecting portion 17a, and the flag-type terminal and the power supply line connecting portion 17a are pressed. Yes.
- the flag-type terminal and the power supply line connecting portion 17a are connected, and conduction between the power supply line and the terminal 17 is ensured.
- the stator 2 has a joint portion 18 formed at a portion where the aluminum exposed portion 16a and the terminal line connecting portion 17b are joined. That is, the joint portion 18 includes first exposed solder (first solder) that joins the aluminum exposed portion 16a where the aluminum core wire is exposed, the terminal wire connecting portion 17b of the terminal 17, and the aluminum exposed portion 16a and the terminal wire connecting portion 17b. 1 solder layer 19).
- first solder first exposed solder
- FIG. 5 is a perspective view of the stator 2 after being resin-molded.
- the stator 2 is covered with a resin 21 except for the power supply line connecting portion 17 a of the terminal 17. That is, in the terminal 17, the base portion 17A and the terminal line connection portion 17b are covered with the resin, and the power supply line connection portion 17a is exposed. Therefore, entry of water or the like into the resin 21 can be prevented, and corrosion of the joint portion 18 can be suppressed. It should be noted that moisture may enter the resin 21 under severe conditions where cooling and overheating are repeated. However, since the rotary electric machine 100 according to the present embodiment includes the joint portion 18 in which the aluminum exposed portion 16a is covered with the first solder, even if water or the like enters the resin 21, it corrodes. Can be suppressed.
- FIG. 6 is a cross-sectional view of the joint 18 between the terminal 17 of the rotating electrical machine 100 and the aluminum wire terminal wire 15a according to the present embodiment, and is joined with reference to FIG. 6 and FIGS. 3 and 4 described above. The unit 18 and the like will be described.
- a hole into which the terminal line 15a is inserted is formed in the terminal line connecting portion 17b.
- the terminal wire 15a and the terminal 17 are joined with the first solder in a state where the terminal wire 15a is inserted into the hole of the terminal wire connecting portion 17b.
- the terminal 17 is tangled with the terminal wire 15a, a hole into which the aluminum exposed portion 16a of the terminal wire 15a is inserted is formed, and the hole is formed so as to cover the entire surface of the aluminum exposed portion 16a.
- a first solder layer 19 is formed at the position.
- the aluminum exposed portion 16a and the terminal wire connecting portion 17b each have a zinc (Zn) and silver (Ag) content of less than 0.1% by mass and a copper (Cu) content of 1.0% by mass. Less than the first solder. That is, the joining part 18 is provided with the 1st solder layer 19 comprised with the 1st solder which joins the aluminum exposure part 16a and the terminal wire connection part 17b. In the joining part 18, since the whole surface of the aluminum exposed part 16a is coat
- the manufacturing method of the rotating electrical machine 100 includes a winding process, a peeling process, a binding process, a flux application process, a joining process, and a solder layer coating process.
- a winding process an aluminum wire (coil 15) covered with a resin film is wound around the stator 2.
- a peeling process is carried out after the winding process.
- the resin film of the terminal wire 15a of the aluminum wire (coil 15) is peeled to expose the aluminum core wire.
- a binding step is performed after the peeling step. In the binding step, the terminal wire 15 a is bound to the copper terminal 17 and attached to the terminal 17.
- the flux application process is performed.
- the flux application process the flux is applied to the terminal wires 15a and the terminals 17.
- the surface tension of the first solder is lowered to facilitate soldering, the contamination of the surfaces of the aluminum exposed portions 16a and the terminals 17 is removed, and the aluminum exposed portions 16a and the terminals 17 are removed. It is possible to prevent the surface of the surface from being oxidized and being oxidized during soldering.
- the joining step the entire surface of the exposed aluminum portion 16a of the terminal wire 15a is covered with the first solder containing zinc of less than 0.1% by mass and silver of less than 0.1% by mass.
- the exposed aluminum portion 16a and the terminal 17 are joined.
- the first solder layer 19 is formed so as to cover the entire surface of the aluminum exposed portion 16a, and conduction between the coil 15 and the external power supply line is achieved, and water is applied to the aluminum exposed portion 16a. Both intrusion control is realized. That is, conduction and water stop can be realized only by the joining process, and productivity can be further improved in manufacturing the rotating electrical machine 100.
- the aluminum exposed portion 16a of the terminal wire 15a and the terminal 17 can be joined using an ultrasonic soldering method.
- soldering is performed by ultrasonically vibrating a soldering iron, so that the contamination of the aluminum exposed portion 16a and the terminal 17 can be removed without using flux. Therefore, when an ultrasonic soldering method is employed in the joining process, the flux application process can be omitted. For this reason, in the manufacture of the rotating electrical machine 100, the productivity can be further improved.
- FIG. 7 is a graph showing a change in the resistance value of the joint 18 when the salt spray test is performed on the joint 18 between the terminal 17 and the terminal wire 15a of the coil 15.
- a silver-containing solder having a large electrode potential difference from Al is used, if an uncoated portion that is not covered with solder is generated, the aluminum core wire is quickly corroded, and the contact resistance is greatly increased.
- the first solder which is a Sn—Cu based solder not containing silver, as in the present embodiment, the progress of corrosion is suppressed and the increase in the resistance value of the joint 18 is suppressed.
- FIG. 8 is a cross-sectional view in the case where a groove 17b1 is formed instead of forming a hole in the terminal line connecting portion 17b and the aluminum exposed portion 16a is covered with the first solder.
- FIG. 9 is a cross-sectional view of FIG. 8 viewed from the side.
- a groove portion 17b1 for installing the aluminum exposed portion 16a may be provided in the terminal line connecting portion 17b. Thereby, the aluminum exposed portion 16a can be entangled in the groove portion 17b1 without forming a hole for tangling the aluminum exposed portion 16a in the terminal line connecting portion 17b of the terminal 17.
- soldering is performed with the first solder in a state where the aluminum exposed portion 16a is entangled with the groove portion 17b1.
- soldering is performed with the first solder so that the groove 17b1 is filled with the first solder. Since the groove portion 17b1 is formed, the worker who solders can easily fill the groove portion 17b1 with the first solder. Then, by filling the groove 17b1 with the first solder, the entire surface of the aluminum exposed portion 16a is covered, and corrosion of the aluminum exposed portion 16a can be more reliably suppressed.
- FIG. 10 is a cross-sectional view of the joint 18 when soldered with two types of solder having different melting points. Moreover, after soldering using the first solder, soldering may be further performed using a second solder having a melting point lower than that of the first solder. In the second modification, as shown in FIG. 10, the joint portion 18 of the stator 2 is formed on the surface of the first solder layer 19, and the second solder layer having a lower melting point than the first solder layer 19. 20 is further included.
- the method for manufacturing the rotating electrical machine 100 may further include a solder layer coating step. That is, after the joining step, soldering is performed with the second solder having a melting point lower than that of the first solder so as to cover the first solder layer 19 formed by solidifying the first solder.
- a second solder layer 20 may be formed on the portion 18.
- the rotating electrical machine 100 may be used under severe conditions where cooling and heating are repeated.
- the case where the rotary electric machine 100 is applied to the air blower mounted in the outdoor unit of an air conditioning apparatus can be considered.
- a heat exchanger that functions as a condenser or an evaporator is installed in the outdoor unit, and rainwater or the like may enter depending on the installation position. Under such circumstances, moisture may enter the resin mold of the stator 2.
- the rotating electrical machine 100 since the entire surface of the aluminum exposed portion 16a of the joint portion 18 is covered with the first solder, even if moisture enters the inside of the resin mold, the rotating electric machine 100 is more resistant to corrosion. It can be surely suppressed. In addition, by securing the first solder, it is possible to achieve both ensuring of electrical conductivity and waterproofing at the joint 18, and improve the productivity of the rotating electrical machine 100.
- the terminal 17 is joined with the first solder having a small silver content with a large potential difference from aluminum. Therefore, the corrosion rate can be suppressed.
- the first solder used for joining the joint portion 18 contains a large amount of Sn having a relatively small electrode potential difference from Al, and the copper content is less than 1% by mass%. Since it is a Sn—Cu solder, the corrosion rate can be further suppressed.
- the rotating electrical machine 100 joins the joint 18 with the first solder having a small zinc content so as not to reduce the corrosion resistance of the solder itself, the corrosion can be more reliably suppressed. Can do.
- the rotating electrical machine 100 according to the present embodiment can obtain the conductivity between the terminal 17 and the aluminum exposed portion 16a and the water stoppage of the joint portion 18 only by the soldering process between the terminal 17 and the aluminum exposed portion 16a. Production students are improving.
- stator 3 rotor, 4 motor housing, 5 casing, 6 bearing housing, 7 shaft, 8 bearing, 8a bearing, 8b bearing, 9 sheet metal cover, 10 bracket cover, 11 printed circuit board, 12 propeller fan, 13 stator Iron core, 14 insulator, 15 coil, 15a terminal wire, 16a aluminum exposed part, 17 terminal, 17A base, 17a power supply line connecting part, 17b terminal line connecting part, 17b1 groove part, 18 joint part, 19 first solder layer, 20 Second solder layer, 100 rotating electrical machine.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
Description
図1は、本実施の形態に係る回転電機100の断面図である。図2は、図1に示す回転電機100に被駆動機械であるプロペラファン12を連結した状態の断面図である。図1及び図2を参照して回転電機100の概要構成の一例について説明する。
本実施の形態に係る回転電機100は、生産性を向上させながら、銅端子と固定子コイルの端末線との接合部分の腐食をより確実に抑制することができる改良がくわえられたものである。
回転電機100は、ブラシレスDCモータである場合を一例に説明する。また、本実施の形態では、回転電機100は、空気調和装置の室外機のプロペラファン12を駆動する態様を例に説明する。
ケーシング5及びベアリングハウジング6を構成しているモールド樹脂は、たとえば、不飽和ポリエステルなどの熱硬化性樹脂を採用することができる。また、回転電機100には、回転子3の磁極位置を検知するホール素子が実装されたプリント基板11が設けられている。プリント基板11は、たとえばプリント基板保持器に溶着などによって固定される。なお、プリンン基板保持器は、たとえば回転子3の端面とベアリングハウジング6の間に配設されている。
図3は、本実施の形態に係る回転電機100のモールド前の固定子2の斜視図である。図4は、本実施の形態に係る回転電機100のモールド前の固定子2の外周側部分の拡大図である。図3及び図4を参照して樹脂モールド前の固定子2の構成などについて説明する。
図5は、樹脂モールドされた後の固定子2の斜視図である。固定子2は、端子17の電源供給線接続部17aを除き、樹脂21により被覆される。つまり、端子17は、基部17A及び端末線接続部17bが樹脂によって被覆され、電源供給線接続部17aが露出している。したがって、樹脂21内へ水などの進入を防止することができ、接合部18の腐食を抑制することができるようになっている。なお、冷却と過熱が繰り返される過酷な状況下においては、樹脂21内に水分が進入してしまう場合もある。しかし、本実施の形態に係る回転電機100は、アルミ露出部16aが第1のはんだで覆われた接合部18を備えているので、水などが樹脂21内に侵入しても、腐食してしまうことを抑制することができるようになっている。
図6は、本実施の形態に係る回転電機100の端子17とアルミ線の端末線15aとの接合部18の断面図である、図6と前述の図3及び図4とを参照して接合部18などについて説明する。
端末線接続部17bには、端末線15aが挿入される穴が形成されている。端末線15aと端子17は、端末線接続部17bの穴に端末線15aが挿入された状態で第1のはんだで接合される。具体的には、端子17には、端末線15aが絡げられ、端末線15aのアルミ露出部16aが挿入される穴が形成され、アルミ露出部16aの表面全体を覆うように、穴の形成位置に第1のはんだ層19が形成されている。
ここで、回転電機100の製造方法について説明する。回転電機100の製造方法では、巻付工程、剥離工程、絡げ工程、フラックス塗布工程、接合工程及びはんだ層被覆工程を備えている。
巻付工程では、樹脂被膜で被覆されたアルミ線(コイル15)を固定子2に巻き付ける工程である。巻付工程の後に剥離工程を実施する。剥離工程では、アルミ線(コイル15)の端末線15aの樹脂被膜を剥離し、アルミ芯線を露出する。剥離工程の後に絡げ工程を実施する。絡げ工程では、端末線15aを銅材の端子17に絡げ、端子17に取り付ける。
図7は、端子17とコイル15の端末線15aとの接合部18について、塩水噴霧試験を実施した際の接合部18の抵抗値変化を示すグラフである。Alとの電極電位差が大きい銀含有はんだを用いた場合には、はんだに覆われていない非被覆部が生じると速やかにアルミ芯線が腐食され、接触抵抗が大きく上昇する。
本実施の形態のように、銀を含有しないSn-Cu系はんだである第1のはんだを用いることで、腐食進行が抑えられ、接合部18の抵抗値の増加は抑制される。このため、回転電機100の製造方法において、製造工程のバラツキによりアルミ芯線が第1のはんだに覆われない非被覆部が仮に生じた場合であっても、腐食が進行しにくい接合部18を形成することができる。
図8は、端末線接続部17bに穴を形成する代わりに溝部17b1を形成し、アルミ露出部16aを第1のはんだで覆った場合の断面図である。図9は、図8を側面から見た場合の断面図である。
アルミ露出部16aのうち被覆されない部分が、より生じないようにするため、端末線接続部17bにアルミ露出部16aを設置する溝部17b1を設けてもよい。これにより、端子17の端末線接続部17bにアルミ露出部16aを絡げる穴を形成しなくても、溝部17b1内にアルミ露出部16aを絡げることができる。そして、溝部17b1にアルミ露出部16aが絡げられた状態で第1のはんだではんだ付けを実施する。このとき、図8及び図9に示すように、溝部17b1に第1のはんだが充填されるように第1のはんだではんだ付けを実施する。はんだ付けする作業者は、溝部17b1が形成されているため、容易に第1のはんだを溝部17b1に充填することができる。そして、溝部17b1に第1のはんだが充填されることで、アルミ露出部16aの表面全体を覆われ、より確実にアルミ露出部16aの腐食を抑制することができる。
図10は、融点の異なる2種類のはんだではんだ付けした場合の接合部18の断面図である。また、第1のはんだを用いてはんだ付けした後、第1のはんだより低融点の第2のはんだを用いてさらにはんだ付けしてもよい。変形例2では、図10に示すように、固定子2の接合部18は、第1のはんだ層19の表面上に形成され、第1のはんだ層19よりも融点が低い第2のはんだ層20をさらに有している。
回転電機100は、冷却と加熱が繰り返される過酷な状況下で使用される場合もある。たとえば、回転電機100を空気調和装置の室外機に搭載される送風機に適用した場合が考えられる。室外機には、凝縮器又は蒸発器として機能する熱交換器が設置され、また、設置位置によっては雨水などが侵入してくる場合もある。このような状況下では、固定子2の樹脂モールド内部へ水分が進入してくる場合がある。
Claims (11)
- 表面に樹脂被膜層が形成されたアルミ線が巻き付けられた固定子と、
前記固定子の内側に配置された回転自在の回転子と、
を備え、
前記アルミ線は、
端末線に形成され、前記樹脂被膜層が剥離されてアルミ芯線が露出しているアルミ露出部を有し、
前記固定子は、
前記アルミ露出部と前記回転子を回転させる電力を供給するのに利用される電源供給線とが取り付けられ、前記アルミ露出部と前記電源供給線との電気的導通に利用される端子と、
前記アルミ露出部の表面全体を覆うように前記端子上に形成され、前記アルミ露出部と前記端子とを接合する第1のはんだ層とを有する
回転電機。 - 前記第1のはんだ層の表面上に形成され、前記第1のはんだ層よりも融点が低い第2のはんだ層をさらに有する
請求項1に記載の回転電機。 - 前記端子には、
前記アルミ露出部が絡げられ、前記アルミ露出部が挿入される穴が形成され、
前記アルミ露出部の表面全体を覆うように、前記穴の形成位置に前記第1のはんだ層が形成されている
請求項1又は2に記載の回転電機。 - 前記端子には、
前記アルミ露出部が絡げられ、前記アルミ露出部が設置される溝部が形成され、
前記アルミ露出部の表面全体を覆うように、前記溝部に前記第1のはんだ層を構成するはんだが充填されている
請求項1又は2に記載の回転電機。 - 前記端子は、
銅材で構成され、
前記第1のはんだ層は、
質量%で0.1%未満の亜鉛、及び質量%で0.1%未満の銀を含有したはんだで構成されている
請求項1~4のいずれか一項に記載の回転電機。 - 前記第1のはんだ層は、
質量%で0.1%未満の銅を含有したSn-Cu系はんだで構成されている
請求項5に記載の回転電機。 - 前記アルミ線は、
直径が0.9mm以上である
請求項1~6のいずれか一項に記載の回転電機。 - 回転子を回転させる電力を供給するのに利用される電源供給線が取り付けられる銅端子が設けられた固定子を備えた回転電機の製造方法であって、
樹脂被膜で被覆されたアルミ線を前記固定子に巻き付ける巻付工程と、
前記アルミ線の端末線の前記樹脂被膜を剥離し、アルミ芯線を露出する剥離工程と、
前記端末線を前記銅端子に絡げる絡げ工程と、
質量%で0.1%未満の亜鉛、及び質量%で0.1%未満の銀を含有した第1のはんだで、前記端末線の前記アルミ芯線の表面全体を覆うように、前記端末線と前記銅端子とを接合する接合工程と、
を備えた
回転電機の製造方法。 - 前記絡げ工程と前記接合工程との間に実施され、前記端末線及び前記銅端子にフラックスを塗布する塗布工程をさらに備えた
請求項8に記載の回転電機の製造方法。 - 前記接合工程では、
超音波はんだ付け工法を用いて前記端末線と前記銅端子とを接合する
請求項8に記載の回転電機の製造方法。 - 前記第1のはんだが固化して形成されたはんだ層を覆うように、前記第1のはんだよりも融点が低い第2のはんだではんだ付けをするはんだ層被覆工程をさらに備えた
請求項8~10のいずれか一項に記載の回転電機の製造方法。
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GB1708072.2A GB2547837B (en) | 2014-11-27 | 2014-11-27 | Electric motor and method of manufacturing electric motor |
JP2016561156A JP6377175B2 (ja) | 2014-11-27 | 2014-11-27 | 回転電機及び回転電機の製造方法 |
US15/523,699 US10790718B2 (en) | 2014-11-27 | 2014-11-27 | Electric motor having stator with solder layer on aluminum exposed portion of terminal wire and method of manufacturing electric motor |
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