EP0931321A1 - Groupe de contact comprenant un posistor - Google Patents

Groupe de contact comprenant un posistor

Info

Publication number
EP0931321A1
EP0931321A1 EP97909157A EP97909157A EP0931321A1 EP 0931321 A1 EP0931321 A1 EP 0931321A1 EP 97909157 A EP97909157 A EP 97909157A EP 97909157 A EP97909157 A EP 97909157A EP 0931321 A1 EP0931321 A1 EP 0931321A1
Authority
EP
European Patent Office
Prior art keywords
contact
group according
points
contact group
elements
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.)
Granted
Application number
EP97909157A
Other languages
German (de)
English (en)
Other versions
EP0931321B1 (fr
Inventor
Bernd Gruhn
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.)
TDK Electronics AG
Original Assignee
Siemens Matsushita Components GmbH and Co KG
Epcos AG
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 Siemens Matsushita Components GmbH and Co KG, Epcos AG filed Critical Siemens Matsushita Components GmbH and Co KG
Publication of EP0931321A1 publication Critical patent/EP0931321A1/fr
Application granted granted Critical
Publication of EP0931321B1 publication Critical patent/EP0931321B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections

Definitions

  • the invention relates to a contact group for semiconductor resistors such as PTC thermistors.
  • PTC resistors motor start PTC resistors
  • the resistance of the PTC thermistor increases from a few ohms, for example 10 ⁇ in a cold state in a very short time, often within a few seconds in relation to the cold state to very high resistance values, for example in the order of 20,000 ⁇ lie.
  • PTC thermistors form cracks that can lead to breakage and thus destruction of the PTC thermistor.
  • the current supply in such PTC thermistors is preferably via spring contacts which bear on the PTC thermistor with a certain pressure, there is a risk that, if the PTC thermistor breaks, for example the current-carrying spring contacts come into contact with one another and thereby come into contact A short circuit occurs or that more or fewer large fragments of a broken PTC thermistor are still in contact with one another and flow over the fragments in contact on the order of several amperes.
  • the object of the invention is therefore to improve a contact group for semiconductor resistors, such as PTC thermistors, in such a way that the highest possible level of security is ensured.
  • this object is achieved by a contact group for semiconductor resistors, such as PTC thermistors, by the features of claim 1.
  • Advantageous further developments are the subject of the subclaims.
  • leakage currents could also result from the fact that individual fragments of the broken PTC thermistor are still in contact with one another, as a result of which the latter is heated accordingly and consequently smoldering fires can occur, in the worst case even fires.
  • the contact elements are preferably formed as one-piece elements from contact springs and preloaded parts to solve the problem described above.
  • corresponding forces are exerted on the component not only at the points at which the contact springs bear against the component, but also at the points at which the prestressed parts bear against the component.
  • a force is exerted by the prestressed parts in the direction of the electrical component at the points which are offset from the contact points on the opposite side, on which a force is exerted by means of the contact springs are. Since opposing forces thus act on the component at mutually offset locations, the component breaks at least into two fragments when cracks occur, such that the two fragments of the broken component are no longer in contact with one another. Therefore, no currents, especially no leakage currents, can occur and the occurrence of smoldering fires or fires is prevented.
  • a torque acts on each of the fragments when the component breaks. If the component breaks or breaks into individual pieces, this ensures that, on the one hand, no short circuit can occur between the contact springs and, on the other hand, no leakage currents between the components.
  • Fragments can occur because the individual fragments in the contact group according to the invention are additionally separated from one another by the interaction of the asymmetrical contact elements.
  • the pretensioned parts of the contact elements are electrically insulated at least at their free ends.
  • the locations on the PTC thermistor can which the prestressed parts rest against, be electrically isolated.
  • Fig.l is a schematic view of an embodiment of a contact group according to the invention using the example of a PTC thermistor provided in an engine starting device;
  • FIG 3 shows a schematic view of a known contact group on a PTC thermistor provided in an engine starting device.
  • Fig.l is a schematic view of a contact group on
  • Example of a PTC thermistor 3 provided in an engine starting device is shown.
  • the PTC thermistor 3 is held in a housing 1 via receptacles 2a and 2b. Furthermore, two, for example, U-shaped contact holders 6a and 6b are provided in the housing 1.
  • a contact element 5a or 5b is attached to each of the contact holders 6a and 6b.
  • Each of the contact elements 5a and 5b has two resilient areas 51a and 52a or 51b and 52b, one spring area 51a or 51b serving as a contact spring and the other resilient area 52a or 52b serving as a prestressed part.
  • Contact elements 5a and 5b, which have contact springs 51a, 51b and prestressed parts 52a, 52b, are each made in one piece.
  • Both contact elements 5a and 5b are biased so that each of the resilient areas 51a, 52a and 51b, 52b, i.e. the contact springs 51a, 51b or the prestressed parts 52a, 52b, on the PTC thermistor 3 forces are exerted.
  • the forces exerted by 51a, 51b act on the PTC thermistor 3 at contact points 3a, 3b.
  • the forces exerted by the prestressed parts 52a and 52b act on the PTC thermistor 3 at the insulated points 4a and 4b in the embodiment shown in FIG.
  • the points 4a and 4b are electrically isolated, for example by mica.
  • FIG. 2 shows the contact group shown in FIG. 1 after the PTC thermistor 3 has broken. If the PTC thermistor 3 breaks, for example, along broken edges 30 ', the two PTC thermistor fragments 3' and 3 "are rotated, for example, into the position shown in FIG. 2. A corresponding rotation is brought about by the fact that the PTC thermistor fragments 3 'and 3 "The resilient areas 51a and 52b or 52a and 51b each exert forces at contact points 3a, 4b and 3b, 4a which are offset from one another. Therefore, the thermistor fragments 3 'and 3 act "clockwise moments M' and M" in a clockwise direction, which is indicated by the arrows entered at the reference symbols M 'and M ".
  • the receptacles 2a and 2b which serve as holders for the PTC thermistor 3, are designed such that they also break if the PTC thermistor 3 breaks, and thus rotation of the two PTC thermistor fractions 3 'and 3 "is not impeded.

Abstract

La présente invention concerne un groupe de contact pour résistances de semi-conducteurs, constitué d'un ensemble d'éléments de contact (5a, 5b) disposés de manière asymmétrique de telle sorte qu'ils prennent appui, en quinconque les uns vis-à-vis des autres, contre les surfaces latérales opposées d'un élément de contruction électrique (3).
EP97909157A 1996-09-20 1997-09-18 Groupe de contact comprenant un posistor Expired - Lifetime EP0931321B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19638631A DE19638631C2 (de) 1996-09-20 1996-09-20 Kontaktgruppe für Halbleiter-Widerstände, wie Kaltleiter
DE19638631 1996-09-20
PCT/DE1997/002118 WO1998012713A1 (fr) 1996-09-20 1997-09-18 Groupe de contact pour resistances de semi-conducteurs tels que les posistors

Publications (2)

Publication Number Publication Date
EP0931321A1 true EP0931321A1 (fr) 1999-07-28
EP0931321B1 EP0931321B1 (fr) 2000-12-20

Family

ID=7806376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97909157A Expired - Lifetime EP0931321B1 (fr) 1996-09-20 1997-09-18 Groupe de contact comprenant un posistor

Country Status (12)

Country Link
US (1) US6160473A (fr)
EP (1) EP0931321B1 (fr)
JP (1) JP2001500672A (fr)
KR (1) KR20010029532A (fr)
CN (1) CN1231054A (fr)
AT (1) ATE198242T1 (fr)
BR (1) BR9712835A (fr)
DE (2) DE19638631C2 (fr)
DK (1) DK0931321T3 (fr)
ES (1) ES2153185T3 (fr)
MY (1) MY133747A (fr)
WO (1) WO1998012713A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100231796B1 (ko) * 1995-11-07 1999-12-01 무라타 야스타카 고장시에 내부 소자의 파괴를 줄이는 전자 장치
DE19824781B4 (de) * 1998-06-03 2005-05-19 Epcos Ag Elektrisches Bauelement, insbesondere Schaltkaltleiter
JP3567854B2 (ja) * 2000-05-18 2004-09-22 株式会社村田製作所 電子部品
JP3811804B2 (ja) * 2003-08-26 2006-08-23 株式会社センサータ・テクノロジーズジャパン モータ始動用リレーおよびそれを用いた電動圧縮機
JP5274770B2 (ja) * 2006-12-27 2013-08-28 東京パーツ工業株式会社 小型モータ
DE102010012041B4 (de) * 2009-11-19 2015-02-05 Epcos Ag Bauelement
US8174354B2 (en) * 2010-07-23 2012-05-08 Sensata Technologies Massachusetts, Inc. Method and apparatus for control of failed thermistor devices
EP2578624A1 (fr) * 2011-10-06 2013-04-10 Henkel Italia S.p.A. Thermistors PTC polymériques
JP6366906B2 (ja) * 2012-06-14 2018-08-01 センサータ テクノロジーズ マサチューセッツ インコーポレーテッド 電子装置
CN202615954U (zh) * 2012-06-14 2012-12-19 森萨塔科技麻省公司 电子器件
CN103489551B (zh) * 2012-06-14 2018-06-12 森萨塔科技（常州）有限公司 电子器件
US10984927B2 (en) * 2019-05-03 2021-04-20 Electrica S.R.L. PTC thermistor switch for electric motors

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431983A (en) * 1980-08-29 1984-02-14 Sprague Electric Company PTCR Package
JPH01143203A (ja) * 1987-11-27 1989-06-05 Murata Mfg Co Ltd 有機正特性サーミスタ
JPH0378455A (ja) * 1989-08-18 1991-04-03 Matsushita Refrig Co Ltd モータの起動装置
US5117089A (en) * 1990-04-02 1992-05-26 Emerson Electric Co. Structural support for hermetic terminal assembly heater apparatus
JP2611512B2 (ja) * 1990-07-19 1997-05-21 株式会社村田製作所 過電流保護部品
JP2616174B2 (ja) * 1990-07-19 1997-06-04 株式会社村田製作所 過電流保護部品
JP2582338Y2 (ja) * 1993-03-29 1998-09-30 株式会社村田製作所 サーミスタ装置
JPH08203704A (ja) * 1995-01-27 1996-08-09 Tdk Corp 正特性サーミスタ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9812713A1 *

Also Published As

Publication number Publication date
DE59702793D1 (de) 2001-01-25
DE19638631C2 (de) 2002-09-26
KR20010029532A (ko) 2001-04-06
DK0931321T3 (da) 2001-02-12
JP2001500672A (ja) 2001-01-16
ES2153185T3 (es) 2001-02-16
BR9712835A (pt) 1999-11-16
WO1998012713A1 (fr) 1998-03-26
CN1231054A (zh) 1999-10-06
ATE198242T1 (de) 2001-01-15
EP0931321B1 (fr) 2000-12-20
US6160473A (en) 2000-12-12
MY133747A (en) 2007-11-30
DE19638631A1 (de) 1998-04-02

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