JPS5935513B2 - Rectifier for small DC motor - Google Patents

Rectifier for small DC motor

Info

Publication number
JPS5935513B2
JPS5935513B2 JP10630579A JP10630579A JPS5935513B2 JP S5935513 B2 JPS5935513 B2 JP S5935513B2 JP 10630579 A JP10630579 A JP 10630579A JP 10630579 A JP10630579 A JP 10630579A JP S5935513 B2 JPS5935513 B2 JP S5935513B2
Authority
JP
Japan
Prior art keywords
alloy
wear
commutator
brush
small
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP10630579A
Other languages
Japanese (ja)
Other versions
JPS5630280A (en
Inventor
恒彦 轟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10630579A priority Critical patent/JPS5935513B2/en
Publication of JPS5630280A publication Critical patent/JPS5630280A/en
Publication of JPS5935513B2 publication Critical patent/JPS5935513B2/en
Expired legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は直流小型モi夕におけるブラシと整流子を組合
せた整流装置に関するもので、低温における耐摩耗性に
優れ、寿命の長い整流装置を提供するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rectifying device that combines a brush and a commutator in a small DC mower, and provides a rectifying device that has excellent wear resistance at low temperatures and has a long life.

直流に問題となるのは、ブラシと整流子とを組合せた整
流装置である。
A problem with direct current is a rectifier that combines a brush and a commutator.

この摩耗が進むと、摩耗粉のスリツトヘの目詰り、接触
位置の変動による回転むらの発生、トルクの増大、ある
いは接触抵抗の変動などがおこり、初期の性能を維持す
ることが困難になる。近年、直流小型モータを駆動源と
するテープレコーダ、レコードプレーヤ、あるいは各種
自動制御機器に高性能化および長寿命化が要望されてい
るが、各種環境において特性の向上が望まれ、特に、低
温における寿命の向上が強く望まれている。
As this wear progresses, the slits become clogged with wear particles, uneven rotation occurs due to fluctuations in the contact position, torque increases, and contact resistance fluctuates, making it difficult to maintain the initial performance. In recent years, there has been a demand for higher performance and longer life for tape recorders, record players, and various automatic control devices that use small DC motors as drive sources. There is a strong desire to improve lifespan.

一方、摩耗の研究が進み、湿度が低い状態では、摺動部
の吸着水分が減少して潤滑性がなくなり、摩耗が著しく
大きくなることが判明し、低温においては絶対湿度が減
少するため摩耗が大きくなると考えられている。一般に
直流小型モータの整流装置ではオイルやグリース等の潤
滑剤を適用することは限られており、そのため、ブラシ
や整流子の材質については低温での耐摩耗性に優れたも
のが望まれている。直流d遭モータにおいては、整流子
に比べてブラシの形状・寸法が小さいので、ブラシの摩
耗が重要である。
On the other hand, research on wear has progressed and it has been found that when humidity is low, the adsorbed moisture on sliding parts decreases, resulting in loss of lubricity and significantly increased wear.At low temperatures, absolute humidity decreases, causing wear. It is thought that it will grow larger. In general, the use of lubricants such as oil and grease in rectifiers for small DC motors is limited, so materials for brushes and commutators are desired to have excellent wear resistance at low temperatures. . In DC motors, brush wear is important because the shape and size of the brushes are smaller than the commutator.

従来より広く使用されているAgや、数%までのCuを
含むAgCu合金は低温での摩耗が大きく、低温での耐
摩耗性をあげるためには30〜40%のPdを含むAg
Pd合金をブラシに使ラことが効果的である。しかし、
30〜40%のPdを含むAgPd合金をブラシとした
場合には、整流子の摩耗は逆に非常に大きくなるという
問題や、高温多湿においてはAgPd合金ブラシの摩耗
が大きいという問題があつた。本発明はかかる背景にあ
つてなされたものであり、従来より公知であるAgCu
合金に2〜8%のMoおよび3〜10%のPdを添加し
含有させたAgCuMoPd合金をブラシとした整流装
置は、従来より広く使用されている70(f)Ag−3
0%Pd合金刷子に比べて低温においてブラシのみなら
ず整流子の摩耗も少なくまた高温多湿においてブラシの
摩耗が少ないというものであることを見いだしたことに
もとづくものである。なお、,本発明において、合金の
組成比率は重量汀分率で示している。ここで、MO量の
下限を2%としたのは、これより少なければMOの耐摩
粍性に対する寄与が少ないからである。
Conventionally widely used Ag and AgCu alloys containing up to a few percent of Cu suffer from large wear at low temperatures.In order to improve wear resistance at low temperatures, Ag containing 30 to 40% Pd is used.
It is effective to use Pd alloy for the brush. but,
When a brush is made of an AgPd alloy containing 30 to 40% Pd, there are problems in that the wear of the commutator becomes extremely large, and that the wear of the AgPd alloy brush is large in high temperature and humidity. The present invention was made against this background, and the present invention is based on the conventionally known AgCu
A rectifier using a brush made of an AgCuMoPd alloy containing 2 to 8% Mo and 3 to 10% Pd is the 70(f)Ag-3 which has been widely used in the past.
This is based on the discovery that, compared to a 0% Pd alloy brush, not only the brush but also the commutator wears less at low temperatures, and the brush wears less at high temperatures and humidity. In the present invention, the composition ratio of the alloy is expressed in terms of weight fraction. Here, the lower limit of the amount of MO is set to 2% because if it is less than this, the contribution of MO to the wear resistance is small.

また、その上限を8%としたのは、これより多くなると
、本発明になる材料は粉末焼結後に冷間加工して製造し
ているが、伸線加工において切断が生じたり、圧延加工
において割れを生じたりする傾向が増すからである。ま
た、Pd量の下限を3(:f)としたのは、これより少
なければPdの低温耐摩粍性に対する寄与が少なくなる
からであり、その上限を10%としたのは、これより多
くすると合金の加工硬化能が大きくなり、伸線加工など
がしにくくなり、また、低温耐摩耗性への寄与よりも高
温多湿での耐摩耗性の劣化が顕著となつてくるからであ
る。Cu量は公知のAg−Cu合金と同様、2〜10%
が望ましく、これをこえると接触抵抗の変動が大きくな
る。まだ、この種のAg系の接点材料において、結晶粒
を微細化し、マトリクスの強度を高め、耐摩耗性や耐消
耗性を高めるために、CO,Ni、ならびにFeから選
ばれた1種または2種以上の元素を0.01〜0.5(
f)添加することが公知であるが、本発明においても、
CO,NiおよびFeの微量添加によつてマトリクスの
結晶微細化を図つてもよい。以下本発明の実施例を具体
的に説明する。
The upper limit was set at 8% because if the amount exceeds 8%, the material of the present invention is manufactured by cold processing after powder sintering, but breakage may occur during wire drawing or during rolling. This is because there is an increased tendency for cracks to occur. In addition, the lower limit of the Pd amount was set at 3 (:f) because if it was smaller than this, the contribution of Pd to low-temperature wear resistance would be reduced, and the reason why the upper limit was set at 10% is that if it is larger than this, This is because the work hardening ability of the alloy increases, making wire drawing difficult, and the deterioration of wear resistance at high temperatures and humidity becomes more significant than the contribution to low-temperature wear resistance. The amount of Cu is 2 to 10%, similar to known Ag-Cu alloys.
is desirable; if it exceeds this value, the variation in contact resistance will increase. However, in this type of Ag-based contact material, one or two selected from CO, Ni, and Fe are used to refine the crystal grains, increase the strength of the matrix, and improve wear resistance and wear resistance. 0.01 to 0.5 (
f) It is known to add, but also in the present invention,
The crystal grains of the matrix may be made finer by adding small amounts of CO, Ni, and Fe. Examples of the present invention will be described in detail below.

まず、本発明におけるブラシを構成する。First, the brush in the present invention will be constructed.

Ag−Cu−MO−Pd合金の製造方法から述べる。A
gVCMOを含ませる場合溶解鋳造法で合金化しようと
しても、ごく微量のMOを含む合金しか製造できないた
め、上記材料を粉末焼結法により製造した。すなわち、
300メツシユのAg粉末、Cu粉末、MO粉末および
Pd粉末を各々所定割合に秤量し、トリクレン溶媒中で
4時間混合した。その後、空気中で乾燥したのち、混合
粉を80メツシユのふるいに通し、内径50mの金型に
充填し、4。5トン/C7llの圧力で圧縮成形した。
The method for manufacturing the Ag-Cu-MO-Pd alloy will be described. A
In the case of including gVCMO, even if alloying was attempted by melting and casting, only an alloy containing a very small amount of MO could be produced, so the above material was produced by a powder sintering method. That is,
300 meshes of Ag powder, Cu powder, MO powder, and Pd powder were each weighed in predetermined proportions and mixed in a trichlene solvent for 4 hours. Thereafter, after drying in the air, the mixed powder was passed through an 80-mesh sieve, filled into a mold with an inner diameter of 50 m, and compression molded at a pressure of 4.5 tons/C7 liter.

しかる後、真空中において850℃で2時間焼結した。
さらに、10トン/C7!1f)圧力をかけての圧縮成
形と850℃真空中で1時間の焼結を交互に2回繰り返
した。その後、10〜2001)の断面低減率で冷間押
出しをし、さらに600℃アルゴン雰囲気中で1時間の
中間焼鈍をするという手順を繰り返しながら太さ3[0
01まで伸線した。しかる後、中間焼鈍と冷間伸線を上
記同様に繰り返すことにより太さ0.75nnの線材と
し、その後は順次、断面形状がわずかずつ異なる伸線ダ
イスを用いて伸線し、0.31n×0.6m011半円
形断面の線材を得た。この線材を中間焼鈍と伸線を繰り
返し、最終的には0.23mm×0.46半円形断面の
線材(最終加工率20%)とし、この線材を検討用試料
とした。以下、この検討用試料をブラシ材料として実際
に直流小型モータに内蔵させた実施例により、本発明に
なる整流装置の効果を明確にする。
Thereafter, it was sintered in vacuum at 850°C for 2 hours.
Furthermore, compression molding under a pressure of 10 tons/C7!1f) and sintering for 1 hour in a vacuum at 850° C. were alternately repeated twice. After that, cold extrusion was performed at a cross-section reduction rate of 10 to 2001), and intermediate annealing was performed for 1 hour in an argon atmosphere at 600°C.
The wire was drawn to 01. Thereafter, intermediate annealing and cold wire drawing were repeated in the same manner as described above to obtain a wire rod with a thickness of 0.75 nm, and after that, the wire was drawn sequentially using wire drawing dies with slightly different cross-sectional shapes to obtain a wire rod of 0.31 nm× A wire rod with a semicircular cross section of 0.6 m011 was obtained. This wire rod was repeatedly subjected to intermediate annealing and wire drawing, and finally a wire rod with a 0.23 mm x 0.46 semicircular cross section (final processing rate of 20%) was obtained, and this wire rod was used as a sample for examination. Hereinafter, the effects of the rectifier according to the present invention will be clarified using an example in which this study sample was actually built into a small DC motor as a brush material.

実験に使用したモータは市販の定格13.2V(使用範
囲10〜16V)、定格回転数2200rpmの電子制
御方式マイクロモータで、回転数制御用の電子回路部を
取りはずしたモータ本体のブラシに、直接に電圧をかけ
て回転させる方法を用いた。
The motor used in the experiment was a commercially available electronically controlled micromotor with a rating of 13.2 V (use range 10 to 16 V) and a rated rotation speed of 2200 rpm. We used a method of applying voltage to and rotating it.

したがつて、モータ回転数は電圧、電流によつて変るが
、試験条件は10Vで負荷電流が250mAとなるよう
にモータ回転軸にトルクを加えた。その場合、回転数は
2000〜2200rpmである。モータの回路構成を
第1図に示す。
Therefore, although the motor rotation speed varies depending on the voltage and current, the test conditions were 10V and torque was applied to the motor rotating shaft so that the load current was 250mA. In that case, the rotation speed is 2000-2200 rpm. Figure 1 shows the circuit configuration of the motor.

1は整流子を構成するセグメント、2はブラシ、3は鉄
芯に巻かれた電機子巻線、4は火花消去素子(バリスタ
)である。
1 is a segment constituting a commutator, 2 is a brush, 3 is an armature winding wound around an iron core, and 4 is a spark-quenching element (varistor).

整流子は第2図に示す平型であり、1は整流子を構成す
るセグメントで、本発明で整流子材料と称するものはこ
のセグメントの材質をいう。5はセグメントを分割する
スリツトである。
The commutator is a flat type shown in FIG. 2, and 1 is a segment that constitutes the commutator. In the present invention, what is referred to as commutator material refers to the material of this segment. 5 is a slit that divides the segments.

整流子材料の厚さは総厚0.1511]01である。ブ
ラシは第3図に示す双接点ブラシ形状であり、板ばね1
1の先端に検討用ブラシ材料を点溶接で取りつけてある
。13は防振ゴムである。
The thickness of the commutator material is a total thickness of 0.1511]01. The brush has a double contact brush shape as shown in Fig. 3, and the leaf spring 1
A brush material for consideration is attached to the tip of 1 by spot welding. 13 is a vibration-proof rubber.

ブラシと整流子を組合せた場合、摺動軌跡の直径は内側
ブラシに対するものが611m、外側ブラシに対するも
のが8rmである。実験に使用したブラシ材料は最終形
状0.23[0!n×0.4611m断面の線材であり
、この線材を長さ約2n1I[lに切断し、半内側が外
例になるよう曲率半径略4mの円弧状に曲げ、これを第
3図に示すように点溶接した。
When the brush and commutator are combined, the diameter of the sliding trajectory is 611 m for the inner brush and 8 rm for the outer brush. The brush material used in the experiment had a final shape of 0.23 [0! It is a wire rod with a cross section of n x 0.4611 m. This wire rod is cut to a length of about 2n1I [l, and bent into an arc shape with a radius of curvature of about 4 m so that the inner half is the exception, and this is as shown in Figure 3. Spot welded on.

ブラシ材料としては、本発明になる AgCuMOPd合金の他には、比較材料として公知の
AgCu合金およびAgPd合金を用いた。
As brush materials, in addition to the AgCuMOPd alloy according to the present invention, known AgCu alloys and AgPd alloys were used as comparative materials.

整流子材料は表面層が0.9μmの70f)Au一27
%Ag−3%Ni合金、中間層が40μmの95%Ag
−5%、Cu合金、母材がりん青銅である総厚0.15
1nの3層クラツド材を用いた。これらの各材料の組合
せで整流装置を構成してモータを組立て、10V,25
0mAの条件で、温度−10℃、および温度55℃、相
対湿度95%の雰囲気で、前者では200時間、後者で
は500時間連続運転した後にモータを分解し、整流子
およびブラシの摩耗、消耗量を測定した。なお、整流子
材料の損傷は本試験条件の250mA負荷電流では2ケ
所に分けられる。損傷の一つは整流子スリツト近傍にお
ける消耗である。これは、電機子巻線に流れる電流がス
リツトで切り変わるために、サージ電圧が生じ、そのた
め電気的に消耗し、大きな凹みを形成する損傷である。
他の損傷は、スリツト近傍以外の摺動弥の摩耗であり、
これは機械的摺動摩耗が主因である。常温および高温多
湿などの試験では、前者の消耗力?者の摩耗よりかなり
大きい。一方、低温においては後者の摩耗が大きいため
、前者の消耗は摩耗と同じ程度となる。なお、整流子の
摩耗、消耗は、表面粗さ計を用いて、それぞれについて
の深さを測定して、評価した。ブラシの損傷については
、消耗の摩耗との区別がむずかしいため、ブラシ損傷の
長手方向の長さを測定して、摩耗、消耗量とした。第4
図は温度−10℃の条件下における摩耗、消耗量の比較
を、また第5図は温度55℃、相対湿度95%の条件下
における摩耗、消耗量の比較をそれぞれ示す。図におい
て、曲線A,Bはそれぞれ従来例であるAgCu合金、
AhPd合金についての結果を表わしている。
The commutator material is 70f) Au-27 with a surface layer of 0.9 μm.
%Ag-3%Ni alloy, 95%Ag with 40μm intermediate layer
-5%, Cu alloy, base material is phosphor bronze, total thickness 0.15
A 1N three-layer cladding material was used. A rectifier is constructed from a combination of these materials, a motor is assembled, and the voltage is 10V, 25V.
At 0mA, the motor was operated continuously for 200 hours in the former case and 500 hours in the latter at a temperature of -10℃ and a temperature of 55℃ in an atmosphere of 95% relative humidity, and the wear and consumption of the commutator and brushes was measured. was measured. Note that damage to the commutator material can be divided into two places under the 250 mA load current of this test condition. One type of damage is wear near the commutator slits. This is a damage in which the current flowing through the armature winding is switched at the slit, causing a surge voltage, resulting in electrical consumption and the formation of a large dent.
Other damage is wear of the slider other than near the slit,
This is mainly due to mechanical sliding wear. In tests such as normal temperature and high temperature and humidity, the former's wasting power? Significantly greater wear and tear. On the other hand, at low temperatures, the latter wears out more, so the former wears out to the same extent as the wear. Incidentally, wear and consumption of the commutator was evaluated by measuring the depth of each using a surface roughness meter. As for damage to the brush, it is difficult to distinguish wear from consumption, so the length of the damage in the longitudinal direction of the brush was measured and used as the amount of wear and wear. Fourth
The figure shows a comparison of wear and consumption under conditions of a temperature of -10°C, and FIG. 5 shows a comparison of wear and consumption under conditions of a temperature of 55°C and a relative humidity of 95%. In the figure, curves A and B are a conventional example of AgCu alloy,
Results are presented for AhPd alloy.

また、曲線C,Dはそれぞれ実施例であるCu5%、M
O2%一定のAgCuMOPd合金、Cu3(fl)、
MO4%一定のAgCuMOPd合金についての結果を
表わしている。なお、第5図において、実線は整流子の
摩耗深さを示し、また破線は整流子の消耗深さを示して
いる。第4図の−10℃での試験結果から、本発明の効
果が明らかである。
Curves C and D are examples of Cu5% and M
AgCuMOPd alloy with constant O2%, Cu3(fl),
Results are presented for AgCuMOPd alloy with constant MO4%. In addition, in FIG. 5, the solid line shows the wear depth of the commutator, and the broken line shows the wear depth of the commutator. The effect of the present invention is clear from the test results at -10°C shown in FIG.

すなわら、AgCu合金あるいはAgPd合金はブラシ
および整流子のいずれか一方の耐摩耗性がよいと他方の
耐摩耗性は劣る。これに反して、本発明になるAgCu
MOPd合金の場合には、整流子の摩耗が少なく、かつ
ブラシの摩耗消耗がきわめて少ない。特に、従来より使
用される70%Ag−30%Pd合金は、ブラシの摩耗
消耗が少なく、したがつてブラシが摩滅、消失しにくく
、比較的長寿命の整流装置であるが、整流子の摩耗が大
きく、雑音発生などの問題があつた。一しかし、AgC
uMOPd合金ではAgPd合金よりブラシの摩耗消耗
が少なく、かつ、整流子の摩耗がきわめて少ないので、
非常に長寿命の整流装置が得られる。一方、70%Ag
−30%Pd合金については、低温寿命はよいが、高温
多湿での寿命の劣ることが従来より判明している。
That is, in AgCu alloys or AgPd alloys, if either the brush or the commutator has good wear resistance, the other has poor wear resistance. On the contrary, AgCu according to the present invention
In the case of MOPd alloy, there is little wear on the commutator and very little wear and tear on the brushes. In particular, the conventionally used 70%Ag-30%Pd alloy has less wear and tear on the brushes, so the brushes are less likely to wear out or disappear, resulting in a relatively long-life rectifier. This caused problems such as noise generation. However, AgC
The uMOPd alloy has less wear and tear on the brushes than the AgPd alloy, and extremely little wear on the commutator.
A very long-life rectifier is obtained. On the other hand, 70%Ag
It has been known from the past that -30% Pd alloy has a good lifespan at low temperatures, but a poor lifespan at high temperatures and high humidity.

この傾向は白金族金属を含む合金にあり、第5図より、
ブラシの摩耗消耗がきわめて大きくなるためであること
が明らかである。一方、本発明によれば、Pd量が少な
いために、高温多湿におけるブラシの摩粍消耗が少ない
。以上、本発明の実施例について代表例で示したが、整
流子材料の組成比率を変えて実験を行なつたところ、次
の結果が得られた。
This tendency exists in alloys containing platinum group metals, and from Figure 5,
It is clear that this is because the wear and tear of the brush becomes extremely large. On the other hand, according to the present invention, since the amount of Pd is small, the wear and tear of the brush in high temperature and high humidity is small. The embodiments of the present invention have been described above using representative examples, but when experiments were conducted by changing the composition ratio of commutator materials, the following results were obtained.

整流子材料の中間層を95%Ag−5%Cd合金とした
場合には、整流子の摩耗が若干多くなるほかは、中間層
が95%Ag−5%Cu合金の場合とほぼ同じ結果が得
られた。
When the intermediate layer of the commutator material is made of a 95%Ag-5%Cd alloy, the results are almost the same as when the intermediate layer is made of a 95%Ag-5%Cu alloy, except that the wear of the commutator increases slightly. Obtained.

また、表面積としてAuAgNi合金の代りに60%A
u−40%Ag合金を使用した場合も、特性としてはA
uAgNi合金の場合とほぼ同等であつた。
Also, the surface area is 60%A instead of AuAgNi alloy.
Even when u-40%Ag alloy is used, the characteristics are A.
It was almost the same as the uAgNi alloy.

さらに、Au合金層がない95%Ag−5%Cu合金お
よび95%Ag−5%Cd合金整流子を用いて検討した
ところ、Au合金表面層がある場合に比べて、相対的に
みて接触抵抗変化が大きく、低温耐摩耗性が劣り、高温
多湿では温度上昇による表面変色が大きいという結果で
あつたが、ブラシ摩耗消耗量、整流子摩耗、消耗量のブ
ラシ材料に対する傾向は第4図および第5図と同様であ
つた。したがつて、本発明になる整流装置の整流子とし
ては、AgCu合金、AgCd合金、または、それらの
合金にAu合金を薄く張り合わせたクラツド材が適用さ
れる。Au合金の厚さは主にコスト面から決められ、実
用上は10μm以下で十分である。実験に供した整流子
クラツド材のベースには、りん青銅を用いたが、本発明
による整流装置ではりん青銅層は、Ag合金層の厚さの
節約のため、および、強度補強のために使用したもので
あり、Ag合金層の厚さを使用条件におけるスリツト近
傍の消耗深さ程度以上にすれば、りん青銅層の有無が特
性に影響することはない。以上のように、本発明にかか
る整流装置は、低温での耐摩耗性に優れ、モータの長寿
命化をもたらし、また、高温多湿においてもブラシの摩
耗消耗が少ないため、長寿命化をはかれるものである。
Furthermore, when we investigated using a 95%Ag-5%Cu alloy without an Au alloy layer and a 95%Ag-5%Cd alloy commutator, we found that the contact resistance was relatively higher than that with an Au alloy surface layer. The results showed that the change was large, the low-temperature wear resistance was poor, and the surface discoloration was large due to temperature rise in high temperature and humidity. However, the trends of brush wear consumption, commutator wear, and wear consumption with respect to the brush material are shown in Figure 4 and Figure 4. It was similar to Figure 5. Therefore, as the commutator of the rectifier according to the present invention, AgCu alloy, AgCd alloy, or a clad material made of these alloys laminated with a thin layer of Au alloy is used. The thickness of the Au alloy is determined mainly from the cost perspective, and 10 μm or less is practically sufficient. Phosphor bronze was used as the base of the commutator cladding material used in the experiment, but in the rectifier according to the present invention, the phosphor bronze layer was used to save the thickness of the Ag alloy layer and to strengthen the strength. Therefore, if the thickness of the Ag alloy layer is set to be equal to or greater than the wear depth near the slit under the usage conditions, the presence or absence of the phosphor bronze layer will not affect the characteristics. As described above, the rectifier according to the present invention has excellent abrasion resistance at low temperatures and extends the life of the motor, and also has low wear and tear on the brushes even under high temperature and humidity, resulting in a long life. It is.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の整流装置を適用したモータの回路構成
図、第2図は整流子の斜視図、第3図はブラシの斜視図
、第4図および第5図はそれぞれ温度−10℃、および
温度55℃、相対湿度95%の各条件下における摩耗量
、消耗量の比較図である。 1・・・・・・整流子を構成するセグメント、2・・・
・・・ブラシ、3・・・・・・電機子巻線、5・・・・
・・スリツト、12・・・・・・ブラシ材料。
Figure 1 is a circuit diagram of a motor to which the rectifier of the present invention is applied, Figure 2 is a perspective view of a commutator, Figure 3 is a perspective view of a brush, and Figures 4 and 5 are each at a temperature of -10°C. , and a comparison diagram of the amount of wear and the amount of consumption under each condition of a temperature of 55° C. and a relative humidity of 95%. 1...Segments forming a commutator, 2...
... Brush, 3... Armature winding, 5...
...Slit, 12...Brush material.

Claims (1)

【特許請求の範囲】 1 整流子とブラシを備え、前記ブラシが2〜8%のM
oおよび3〜10%のPdを含有したAgCuMoPd
合金で構成されていることを特徴とする直流小型モータ
の整流装置。 2 ブラシを構成するAgCuMoPd合金におけるC
uの含有量が2〜10%であることを特徴とする特許請
求の範囲第1項記載の直流小型モータの整流装置。 3 整流子がAgCu合金、あるいは厚さ10μm以下
のAu合金を表面層として有するAgCu合金で構成さ
れていることを特徴とする特許請求の範囲第1項記載の
直流小型モータの整流装置。 4 整流子はAgCd合金、あるいは厚さ10μm以下
のAu合金を表面層として有するAgCd合金で構成さ
れていることを特徴とする特許請求の範囲第1項記載の
直流小型モータの整流装置。 5 Cuが2〜10%、Moが2〜8%、Pdが3〜1
0%、および残りAgよりなる合金でブラシが構成され
ていることを特徴とする特許請求の範囲第1項記載の直
流小型モータの整流装置。
[Claims] 1. A commutator and a brush, the brush having an M of 2 to 8%.
AgCuMoPd containing o and 3-10% Pd
A rectifier for a small DC motor characterized by being made of an alloy. 2 C in the AgCuMoPd alloy constituting the brush
2. The rectifying device for a small DC motor according to claim 1, wherein the content of u is 2 to 10%. 3. The commutator for a small DC motor according to claim 1, wherein the commutator is made of an AgCu alloy or an AgCu alloy having a surface layer of an Au alloy with a thickness of 10 μm or less. 4. The commutator for a small DC motor according to claim 1, wherein the commutator is made of an AgCd alloy or an AgCd alloy having a surface layer of an Au alloy with a thickness of 10 μm or less. 5 Cu 2-10%, Mo 2-8%, Pd 3-1
2. The rectifying device for a small DC motor according to claim 1, wherein the brush is made of an alloy consisting of 0% Ag and the remaining Ag.
JP10630579A 1979-08-20 1979-08-20 Rectifier for small DC motor Expired JPS5935513B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10630579A JPS5935513B2 (en) 1979-08-20 1979-08-20 Rectifier for small DC motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10630579A JPS5935513B2 (en) 1979-08-20 1979-08-20 Rectifier for small DC motor

Publications (2)

Publication Number Publication Date
JPS5630280A JPS5630280A (en) 1981-03-26
JPS5935513B2 true JPS5935513B2 (en) 1984-08-29

Family

ID=14430288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10630579A Expired JPS5935513B2 (en) 1979-08-20 1979-08-20 Rectifier for small DC motor

Country Status (1)

Country Link
JP (1) JPS5935513B2 (en)

Also Published As

Publication number Publication date
JPS5630280A (en) 1981-03-26

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