JPH0638457A - Dc motor - Google Patents
Dc motorInfo
- Publication number
- JPH0638457A JPH0638457A JP4192054A JP19205492A JPH0638457A JP H0638457 A JPH0638457 A JP H0638457A JP 4192054 A JP4192054 A JP 4192054A JP 19205492 A JP19205492 A JP 19205492A JP H0638457 A JPH0638457 A JP H0638457A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- saturable reactor
- frame
- bearing
- armature
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 abstract description 10
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc Machiner (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は軸受を介して電機子軸
を電動機枠に支持した直流電動機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC electric motor in which an armature shaft is supported by a motor frame via a bearing.
【０００２】[0002]
【従来の技術】図３は従来の直流電動機を電動機取付台
にお取り付けた状態を示す側面図、図４は図３に示され
る従来の直流電動機をチョッパ制御装置に接続した状態
を示す電気回路図、図５は直流電動機の概念図であり、
これらの図において、１は電気子巻線が設けられた電機
子軸、３は軸受ベアリング４を介し電機子軸１を支持す
る電動機枠で、大地に接地された電動機取付台５にボル
ト６によって固着されている。７は電動機枠３を接地す
る接地線で、電動機取付台５に接続されている。８は直
流電源、９は還流ダイオード、１０はチョッパ制御装置
で、このチョッパ制御装置１０によって直流電源８の出
力電圧が制御され、この制御電圧によっての直流電動機
の速度が制御される。2. Description of the Related Art FIG. 3 is a side view showing a state in which a conventional DC motor is mounted on a motor mount, and FIG. 4 is an electric circuit showing a state in which the conventional DC motor shown in FIG. 3 is connected to a chopper control device. 5 and 5 are conceptual diagrams of the DC motor,
In these drawings, 1 is an armature shaft provided with an armature winding, 3 is an electric motor frame that supports the armature shaft 1 through a bearing bearing 4, and a bolt 6 is attached to an electric motor mount 5 grounded to the ground. It is fixed. Reference numeral 7 is a grounding wire that grounds the electric motor frame 3 and is connected to the electric motor mount 5. Reference numeral 8 is a DC power supply, 9 is a return diode, and 10 is a chopper control device. The chopper control device 10 controls the output voltage of the DC power supply 8, and the control voltage controls the speed of the DC motor.
【０００３】[0003]
【発明が解決しようとする課題】従来の直流電動機は以
上のように構成されているので、チョッパ制御装置１０
が導通状態になると電機子巻線２のチョッパ制御装置１
０側は接地状態となり、また、非導通状態になると還流
ダイオード９が導通状態となり、電機子巻線２のチョッ
パ制御装置１０側は直流電源８の正極電位となる。つま
り、上記動作により電機子巻線２のチョッパ制御装置１
０側は振幅が直流電源８の１／２電圧の交流電位変動を
発生することになる。一方電動機枠３は接地線７により
常に接地電位に維持されているため、図５に示されるよ
うに電機子巻線２のチョッパ制御装置１０側と電機子軸
１との間に存在する浮遊キャパシタンスにより、電機子
巻線２から電機子軸１を通って電動機枠３に変位電流が
流れ、電機子軸１と電動機枠３との間の軸受４に電触が
発生するなどの問題点があった。Since the conventional DC motor is configured as described above, the chopper control device 10
When the armature becomes conductive, the chopper control device 1 for the armature winding 2
The 0 side is in the grounded state, and when the non-conducting state is in the non-conducting state, the return diode 9 is in the conducting state, and the chopper control device 10 side of the armature winding 2 is at the positive potential of the DC power supply 8. That is, by the above operation, the chopper control device 1 for the armature winding 2
On the 0 side, an AC potential fluctuation of which amplitude is 1/2 the voltage of the DC power supply 8 is generated. On the other hand, since the motor frame 3 is always maintained at the ground potential by the ground wire 7, as shown in FIG. As a result, a displacement current flows from the armature winding 2 through the armature shaft 1 to the electric motor frame 3, and there is a problem in that a bearing 4 between the armature shaft 1 and the electric motor frame 3 causes an electric contact. It was
【０００４】この発明は上記のような問題点を解消する
ためになされたもので、軸受の変位電流による電触を防
止することを目的とする。The present invention has been made to solve the above problems, and an object thereof is to prevent electric contact due to a displacement current of a bearing.
【０００５】[0005]
【課題を解決するための手段】この発明に係る直流電動
機は、軸受を介し電機子軸を支持した電動機枠を、可飽
和リアクトルを介して接地したものである。In the DC motor according to the present invention, an electric motor frame supporting an armature shaft via a bearing is grounded via a saturable reactor.
【０００６】[0006]
【作用】この発明における直流電動機は、可飽和リアク
トルにより変位電流に対するインピーダンスが大きくな
り、電機子巻線から電機子軸、軸受を通って電動機枠に
流れる変位電流が減少し、変位電流による電触が防止さ
れる。In the DC motor according to the present invention, the saturable reactor increases the impedance with respect to the displacement current, and the displacement current flowing from the armature winding through the armature shaft and the bearing to the motor frame is reduced. Is prevented.
【０００７】[0007]
【実施例】実施例１．以下、図１、図２に示すこの発明
の一実施例について説明する。図１はこの発明の一実施
例による直流電動機を電動機取付台に取り付けた状態を
示す側面図、図２は図１に示される直流電動機にチョッ
パ制御装置を接続した電気接続図であり、これらの図に
おいて、図３、図４と異なるところは、接地された電動
機取付台５に電動機枠３を絶縁スペーサ１２を介しボル
ト６で取り付け、電動機枠３と電動機取付台５とを電気
的に絶縁すると共に、電動機枠３を変位電流の電流値範
囲内では磁気飽和しない可飽和リアクトル１３を介し接
地線７で電動機取付台５に接続し、電動機取付台５を介
し接地した点である。EXAMPLES Example 1. An embodiment of the present invention shown in FIGS. 1 and 2 will be described below. 1 is a side view showing a state in which a DC motor according to an embodiment of the present invention is mounted on a motor mount, and FIG. 2 is an electrical connection diagram in which a chopper control device is connected to the DC motor shown in FIG. In the figure, the difference from FIGS. 3 and 4 is that the electric motor frame 3 is attached to the grounded electric motor mount 5 with the bolts 6 via the insulating spacers 12 to electrically insulate the electric motor frame 3 and the electric motor mount 5. At the same time, the electric motor frame 3 is connected to the electric motor mount 5 via the saturable reactor 13 that does not magnetically saturate within the current value range of the displacement current by the ground wire 7, and is grounded via the electric motor mount 5.
【０００８】次に動作について説明する。チョッパ制御
装置１０によって直流電動機は速度制御され、一方、電
機子巻線２から図５に示される浮遊キャパシタンス１１
を介して電機子軸１、軸受４、電動機枠３、可飽和リア
クトル１３、電動機取付台５、接地との間に変位電流が
流れるが、この変位電流値範囲内では可飽和リアクトル
１３が磁気飽和せず非常に大きなインダクタンスを有し
ているので、上記変位電流は可飽和リアクトル１３によ
って抑制され減少する。従って、軸受４に流れる変位電
流が抑制され、電触が防止される。Next, the operation will be described. The speed of the DC motor is controlled by the chopper controller 10, while the stray capacitance 11 shown in FIG.
Displacement current flows through the armature shaft 1, the bearing 4, the motor frame 3, the saturable reactor 13, the motor mount 5, and the ground through the saturable reactor 13, but the saturable reactor 13 is magnetically saturated within this displacement current value range. Since it has a very large inductance, the displacement current is suppressed and reduced by the saturable reactor 13. Therefore, the displacement current flowing through the bearing 4 is suppressed and electric contact is prevented.
【０００９】実施例２．上記実施例１においては接地さ
れた電動機取付台５に絶縁スペーサ１２を介し電動機枠
３を取り付けると共に、電動機枠３を可飽和リアクトル
１３を介し接地線７で電動機取付台５に接続している
が、これに限らず、例えば、電動機取付台５を絶縁部材
で大地と電気的に絶縁し、この電動機取付台５に電動機
枠３をボルト６で取り付け、上記電動機枠３を可変リア
クトル１３を介し接地線７で大地に接地しても良く、前
述の実施例と同様の作用効果が得られる。Example 2. In the first embodiment, the motor frame 3 is attached to the grounded motor mount 5 via the insulating spacer 12, and the motor frame 3 is connected to the motor mount 5 via the saturable reactor 13 by the ground wire 7. Not limited to this, for example, the electric motor mount 5 is electrically insulated from the ground by an insulating member, the electric motor frame 3 is attached to the electric motor mount 5 with bolts 6, and the electric motor frame 3 is grounded via the variable reactor 13. The line 7 may be grounded to the ground, and the same effect as that of the above-described embodiment can be obtained.
【００１０】[0010]
【発明の効果】以上のように、この発明によれば電動機
枠を可飽和リアクトルを介して接地しているので、電気
子巻線から浮遊キャパシタンスを介し軸受に流れる変位
電流が上記可飽和リアクトルによって抑制され軸受の電
触が防止される。As described above, according to the present invention, since the motor frame is grounded via the saturable reactor, the displacement current flowing from the armature winding to the bearing via the stray capacitance is caused by the saturable reactor. It is suppressed and the electric contact of the bearing is prevented.
【図１】この発明の一実施例による直流電動機の側面図
である。FIG. 1 is a side view of a DC motor according to an embodiment of the present invention.
【図２】図１に示される直流電動機にチョッパ制御装置
を接続した電気回路を示す回路図である。FIG. 2 is a circuit diagram showing an electric circuit in which a chopper control device is connected to the DC motor shown in FIG.
【図３】従来の直流電動機を示す側面図である。FIG. 3 is a side view showing a conventional DC motor.
【図４】図３に示される直流電動機にチョッパ制御装置
を接続した電気回路を示す回路図である。4 is a circuit diagram showing an electric circuit in which a chopper control device is connected to the DC motor shown in FIG.
【図５】直流電動機の概念図である。FIG. 5 is a conceptual diagram of a DC motor.
１ 電機子軸 ２ 電機子巻線 ３ 電動機枠 ４ 軸受 ７ 接地線 １３ 可飽和リアクトル 1 Armature shaft 2 Armature winding 3 Motor frame 4 Bearing 7 Ground wire 13 Saturable reactor
Claims (1)
した直流電動機において、上記電動機枠を可飽和リアク
トルを介して接地したことを特徴とする直流電動機。1. A direct current electric motor in which an armature shaft is supported by an electric motor frame via a bearing, wherein the electric motor frame is grounded via a saturable reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4192054A JPH0638457A (en) | 1992-07-20 | 1992-07-20 | Dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4192054A JPH0638457A (en) | 1992-07-20 | 1992-07-20 | Dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0638457A true JPH0638457A (en) | 1994-02-10 |
Family
ID=16284856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4192054A Pending JPH0638457A (en) | 1992-07-20 | 1992-07-20 | Dc motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638457A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100426553B1 (en) * | 1998-02-12 | 2004-04-08 | 가부시끼가이샤 도시바 | Motor drive system |
| US7501731B2 (en) * | 2005-03-09 | 2009-03-10 | Btr Robotics Limited Liability Company | Apparatus for enhancing hobby servo performance |
-
1992
- 1992-07-20 JP JP4192054A patent/JPH0638457A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100426553B1 (en) * | 1998-02-12 | 2004-04-08 | 가부시끼가이샤 도시바 | Motor drive system |
| US7501731B2 (en) * | 2005-03-09 | 2009-03-10 | Btr Robotics Limited Liability Company | Apparatus for enhancing hobby servo performance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR960039543A (en) | Method and apparatus for reducing winding failures in switched reluctance machines | |
| JP3648123B2 (en) | Inverter system grounding structure | |
| KR102524759B1 (en) | Ionizer | |
| EP0371427B1 (en) | An arrangement for preventing inductive interference in electric car | |
| CN101669268A (en) | Electromotor | |
| JP3480802B2 (en) | Motor equipment | |
| JPH0638457A (en) | Dc motor | |
| JP3103078B2 (en) | Power supply for video equipment | |
| US2724062A (en) | Electrical circuit for suppressing interference | |
| US6528916B1 (en) | Brushless motor | |
| JP3730137B2 (en) | Power converter | |
| GB1479545A (en) | Stator coil assemblies for rotary electric machines | |
| KR100360509B1 (en) | A motor driving circuit | |
| US6081080A (en) | Method and apparatus for reducing voltage stresses in electric machines | |
| JPH04261307A (en) | Earthing arrangement | |
| JPH10313501A (en) | Grounding circuit for electric car | |
| US3381210A (en) | Alternator-regulator system with arc reduction means | |
| US4128871A (en) | High voltage DC power supply | |
| JP2869538B2 (en) | Discharge current supply device for electric discharge machine | |
| JPH10294161A (en) | Electric equipment | |
| JPH04250365A (en) | Current detector | |
| JP3023513B2 (en) | Electrical equipment | |
| JP2001352792A (en) | Motor | |
| JPH06153438A (en) | Main motor for vehicle | |
| KR810000740Y1 (en) | Small d.c.motor |