WO2012029207A1 - Moteur à collecteur - Google Patents

Moteur à collecteur Download PDF

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Publication number
WO2012029207A1
WO2012029207A1 PCT/JP2011/002150 JP2011002150W WO2012029207A1 WO 2012029207 A1 WO2012029207 A1 WO 2012029207A1 JP 2011002150 W JP2011002150 W JP 2011002150W WO 2012029207 A1 WO2012029207 A1 WO 2012029207A1
Authority
WO
WIPO (PCT)
Prior art keywords
brush
commutator
load
wear
commutator motor
Prior art date
Application number
PCT/JP2011/002150
Other languages
English (en)
Japanese (ja)
Inventor
圭策 中野
誠治 黒住
Original Assignee
パナソニック株式会社
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 パナソニック株式会社 filed Critical パナソニック株式会社
Priority to CN201180042187.6A priority Critical patent/CN103081316A/zh
Publication of WO2012029207A1 publication Critical patent/WO2012029207A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/006—Structural associations of commutators

Definitions

  • the present invention relates to a commutator motor used for a household vacuum cleaner, an electric tool, or the like.
  • a commutator motor presses a brush against a commutator using a brush pressing device configured by a coil spring, a spiral spring, or the like in order to cause the brush and the commutator to be in contact with each other.
  • the brush and the commutator are likely to be subject to electrical wear due to the occurrence of sparks between them and mechanical wear due to sliding between them.
  • brush wear progresses with increasing use time of the commutator motor, and the length of the brush becomes shorter.
  • the contact position between the spring and the brush changes due to the influence of the change over time that the brush length is shortened from the initial use of the commutator motor to the end of use, and the load at which the spring presses the brush changes. That is, the pressure load is large at the beginning of use and gradually decreases at the end of use.
  • this pressing load has an optimum value, and the progress of brush wear is promoted regardless of whether the pressing load is excessive or small.
  • an electric motor with a brush pressing device that maintains the pressing load between the brush and the commutator at a certain optimum value and reduces brush wear (for example, , See Patent Document 1).
  • Fig. 5 shows the relationship between the operating time in the commutator motor and the optimum pressing load between the brush and the commutator.
  • the optimum pressing load between the brush and the commutator tends to increase from the beginning of use when the brush length is long to the end of use when the brush length is short. This is due to the following reason.
  • the commutator has not deteriorated and the spark wear caused by the chattering of the brush is small. Therefore, rather than increasing the pressing load and suppressing the spark wear, the pressing load was reduced to suppress the mechanical wear. This reduces the amount of brush wear.
  • a commutator motor is a commutator motor having a commutator fixed to a rotor, a brush that contacts and slides with the commutator, and a brush pressing device that presses the brush against the commutator.
  • the commutator motor is characterized in that the pressing load increases as the brush wears and the length decreases.
  • FIG. 1 is a schematic cross-sectional view showing a contact portion between a brush and a commutator of a commutator motor according to Embodiment 1 of the present invention from the direction of the rotation axis.
  • FIG. 2 is a diagram showing the relationship between the displacement and the load with respect to the load direction at the action point P1 according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing a contact portion between the brush and the commutator of the commutator motor according to Embodiment 2 of the present invention from the direction of the rotation axis.
  • FIG. 4 is a diagram showing the relationship between the displacement and the load with respect to the load direction at the action point P2 according to Embodiment 2 of the present invention.
  • FIG. 5 is a diagram illustrating a relationship between a usage time in the commutator motor and a pressing load between the brush and the commutator.
  • FIG. 1 is a schematic cross-sectional view of a location where a brush 1 and a commutator 2 of a commutator motor according to Embodiment 1 of the present invention are provided.
  • FIG. 2 is a diagram showing the relationship between the displacement and the load with respect to the load direction at the action point P1 according to Embodiment 1 of the present invention.
  • the brush 1 is applied with a pressing load F at an action point P ⁇ b> 1 by a brush pressing device including a mainspring spring 3 and a brush pressing spring 4.
  • the mainspring spring 3 uses a reverse variable load type mainspring spring and is combined with the brush pressing spring 4.
  • the displacement and the load with respect to the load direction of the action point P1 have the relationship shown in FIG.
  • the brush 1 is composed of a carbon brush.
  • the pressing load F between the brush 1 and the commutator 2 is small, so that mechanical wear is reduced.
  • the commutator is not deteriorated at the initial stage of use, and spark wear caused by chattering of the brush 1 is small.
  • the amount of wear of the brush 1 is smaller when the pressing load F is decreased to reduce the mechanical wear than when the pressing load F is increased to suppress chattering.
  • the pressure load F between the brush 1 and the commutator 2 is large, so that the spark wear is reduced.
  • the amount of wear of the brush 1 is smaller when the pressure load F is increased and the spark wear is reduced than when the pressure load F is reduced and the mechanical wear is suppressed.
  • the brush of the commutator motor is prevented from being worn, and the life of the commutator motor can be extended.
  • FIG. 3 is a schematic cross-sectional view of a location where the brush 1 and the commutator 2 of the commutator motor according to Embodiment 2 of the present invention are provided.
  • FIG. 4 is a diagram showing the relationship between the displacement and the load with respect to the load direction at the action point P2 according to Embodiment 2 of the present invention.
  • the brush 1 is applied with a pressing load F at an action point P ⁇ b> 2 by a brush pressing device including a spiral spring 5 and a magnet 6.
  • the magnet 6 is bonded to the spiral spring 5, and when the length of the brush 1 is worn and shortened, the pressing load between the brush 1 and the commutator 2 increases as the magnets 6 approach each other.
  • the displacement and the load with respect to the load direction of the action point P2 have the relationship shown in FIG. At this time, it is set so that the initial stage of use in which the length of the brush 1 is long hits the position of L3, and the end stage of use in which the length of the brush 1 is worn and shortened becomes the position of L4.
  • the pressing load F between the brush 1 and the commutator 2 is small, mechanical wear is reduced, and the brush 1 is worn.
  • the amount of wear of the brush 1 is reduced by reducing the spark wear.
  • the brush wear of the commutator motor is suppressed, and the life of the commutator motor can be extended.
  • the commutator motor according to the present invention is useful for a brush pressing device capable of realizing a long brush life and a commutator motor using the brush pressing device.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention concerne un moteur à collecteur comprenant un collecteur fixé sur un rotor, un balai qui coulisse en contact avec le collecteur, ainsi qu'un dispositif de pression de balai qui appuie le balai sur le collecteur, ce dispositif augmentant la charge de pression à mesure que le balai s'use et que sa longueur raccourcit. La configuration selon l'invention permet de supprimer la progression de l'usure du balai, du début à la fin de l'utilisation du moteur à collecteur, ce qui améliore la durée de vie utile du moteur à collecteur.
PCT/JP2011/002150 2010-08-30 2011-04-12 Moteur à collecteur WO2012029207A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201180042187.6A CN103081316A (zh) 2010-08-30 2011-04-12 换向器电动机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-191805 2010-08-30
JP2010191805A JP2012050278A (ja) 2010-08-30 2010-08-30 整流子電動機

Publications (1)

Publication Number Publication Date
WO2012029207A1 true WO2012029207A1 (fr) 2012-03-08

Family

ID=45772334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/002150 WO2012029207A1 (fr) 2010-08-30 2011-04-12 Moteur à collecteur

Country Status (3)

Country Link
JP (1) JP2012050278A (fr)
CN (1) CN103081316A (fr)
WO (1) WO2012029207A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109038966B (zh) * 2017-06-09 2020-11-06 马渊马达株式会社 马达用刷握装置及搭载有该马达用刷握装置的有刷马达

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01120766U (fr) * 1988-02-08 1989-08-16
JPH02214443A (ja) * 1989-02-13 1990-08-27 Aisan Ind Co Ltd ブラシ押圧装置付電動機
JP2008278722A (ja) * 2007-05-07 2008-11-13 Mitsubishi Electric Corp 刷子及び回転電機及び送風機及び電気掃除機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01120766U (fr) * 1988-02-08 1989-08-16
JPH02214443A (ja) * 1989-02-13 1990-08-27 Aisan Ind Co Ltd ブラシ押圧装置付電動機
JP2008278722A (ja) * 2007-05-07 2008-11-13 Mitsubishi Electric Corp 刷子及び回転電機及び送風機及び電気掃除機

Also Published As

Publication number Publication date
JP2012050278A (ja) 2012-03-08
CN103081316A (zh) 2013-05-01

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