WO1998013846A1 - Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen - Google Patents
Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen Download PDFInfo
- Publication number
- WO1998013846A1 WO1998013846A1 PCT/DE1997/002111 DE9702111W WO9813846A1 WO 1998013846 A1 WO1998013846 A1 WO 1998013846A1 DE 9702111 W DE9702111 W DE 9702111W WO 9813846 A1 WO9813846 A1 WO 9813846A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermal fuse
- ptc thermistor
- extension
- shaped
- against overheating
- Prior art date
Links
- 238000013021 overheating Methods 0.000 title claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract 2
- 238000000926 separation method Methods 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 claims 1
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 230000008018 melting Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000009420 retrofitting Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H61/00—Electrothermal relays
- H01H61/002—Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/048—Fuse resistors
- H01H2085/0483—Fuse resistors with temperature dependent resistor, e.g. thermistor
Definitions
- the invention relates to a device for protecting electrical devices against top heat.
- a so-called motor start thermistor (PTC resistors) is connected upstream.
- PTC resistors motor start thermistor
- the current flowing through the PCT resistor heats the PTC resistor very strongly, as a result of which the resistance value of the PTC resistor increases from a few ohms in the cold state in a very short time, often within a few seconds, to very high resistance values.
- the object of the invention is therefore to protect electrical devices from overheating in such a way that even the danger that local smoldering fires can occur no longer exists.
- a thermal fuse is provided in the interior of a housing of an electrical device to be protected in order to protect electrical devices against overheating.
- the thermal fuse is provided in the immediate vicinity of a critical element of the electrical device.
- the thermal fuse preferably consists of a low-melting material.
- a particular advantage of the inventive solution lies in the fact that existing electrical devices only have to be modified slightly so that a thermal fuse, which according to the invention is to be arranged in the immediate vicinity of a critical element, can be accommodated. In this way, existing electrical devices according to the invention can be retrofitted with a thermal fuse.
- a thermal fuse is arranged in the immediate vicinity of the critical element, in this case in the immediate vicinity of the PTC thermistor, an immediate response of the thermal fuse is guaranteed in the event of overheating and thus one according to Invention equipped or retrofitted electrical device absolutely protected against overheating.
- the thermal fuse is U-shaped or V-shaped.
- the apex of the U- or V-shaped fuse is thus in the immediate vicinity of the critical element, ie the PTC thermistor.
- thermal fuse specially designed according to the invention in an advantageous manner and its arrangement in the immediate vicinity of the element to be monitored, for example a PTC thermistor
- melting takes place because of the small distance between the thermal fuse and the critical element to be protected from overheating thermal fuse particularly quickly.
- At least a part of the housing surrounding the electrical device made of self-extinguishing plastic or the housing itself is therefore also lined with a self-extinguishing plastic for safety reasons.
- Fig.l is a schematic plan view of an engine starting device with PTC thermistor
- FIG. 2 shows schematically in enlargement part of a region of the engine starting device shown in FIG. 1, in which a preferred embodiment of a thermal fuse is accommodated according to the invention
- FIG. 3 shows schematically in enlargement the part of an area of the engine starting device shown in FIG. 1, in which a further preferred embodiment of a thermal fuse is accommodated according to the invention
- FIG. 4 schematically also shows an enlarged plan view of the embodiment of a thermal fuse shown in FIG.
- a PTC thermistor 3 is held in a housing 1 via brackets 2a and 2b.
- spring contacts 5a and 5b are spring contacts 5a and 5b to the Kal conductor, via which current is supplied.
- the spring contacts 5a and 5b are conductively connected to connecting parts 4a and 4b, which are connected via extensions 4a 'and 4b' to schematically indicated power supply plug contacts 7a and 7b.
- the extension 4b 'of Connection part 4b separated at a point denoted by reference numeral 6 and thus interrupted.
- the separation point 6 is bridged by a thermal fuse 8, in that its two ends 81 and 82, which are angled by approximately 90 °, at regions of the extension 4b ′ separated by the separation point 6, for example by means of in Fig.2 rivets 9 indicated by dashed lines are attached.
- a preferred embodiment of the thermal fuse 8 in FIG. 2 has the shape of the capital letter U, and its apex 83 pointing downward in FIG. 2 extends as close as possible to the contact conductor 3.
- the thermal fuse 61 is made of a low-melting material whose melting point is selected so that it is below a temperature critical for the PTC thermistor 3. This ensures that the PTC thermistor 3 or the motor starting device in which the PTC thermistor 3 is accommodated does not exceed the maximum permissible temperature.
- FIG. 3 shows a top view corresponding to FIG. 2, which is also around the top view in FIG.
- FIG. 4 shows a top view of a 6-arm spring contact 5b along a line IV-IV in FIG. 3 in the direction of the connecting part 4b and its extension 4b '.
- the thermal fuse 8 ' is approximately V-shaped, the apex or reversal point 83' of the V-shaped thermal fuse 8 'again being in the immediate vicinity Is arranged near the PTC thermistor 3.
- the extension 4b ' has a circular or V-shaped indentation 41b' at its end of the separation point 6 adjacent to the plug contact 7b.
- the opposite edge region of the separation point 6 is preferably complementary to the indentation 41b '.
- the apex or reversal point 83 'of the V-shaped thermal fuse 8' can also be arranged between two arms 5b ⁇ and 5b 2 of the 6-arm spring contact 5b. In this way, the distance between the thermistor 3 to be protected against overheating and the thermal fuse 8 'can be kept particularly small.
- one end of the thermal fuse 8 ' is by means of the same Rivets 10 is held and secured between the connecting part 4b and the spring contact 5b.
- Rivets 10 is held and secured between the connecting part 4b and the spring contact 5b.
- the accommodation and fastening of the V-shaped thermal fuse 8 ′ shown in FIGS. 3 and 4 is also possible when retrofitting
- the embodiment and accommodation of the thermal fuse 8 shown in FIG. 2 is generally preferable for retrofitting, although in FIG In this case, two holes must be provided for inserting the rivet 9.
- the rivet When retrofitting with the thermal fuse 8 'according to FIGS. 3 and 4, on the other hand, the rivet would have to be drilled out, by means of which the 6-arm spring contact 5b is fastened to the connecting part 4b. After insertion of the extension 82 'of the fuse 8' ther see between the connection part 4b and the spring contact 5b, the connection part 4b, the extension 82 'of the thermal fuse 8' and the spring contact 5b are to be firmly connected to one another by means of a new rivet 10.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Fuses (AREA)
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
- Thermally Actuated Switches (AREA)
- Protection Of Generators And Motors (AREA)
- Motor And Converter Starters (AREA)
- Amplifiers (AREA)
- Developing Agents For Electrophotography (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97909150A EP0928492B1 (de) | 1996-09-27 | 1997-09-18 | Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen |
DE59702740T DE59702740D1 (de) | 1996-09-27 | 1997-09-18 | Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen |
AT97909150T ATE198008T1 (de) | 1996-09-27 | 1997-09-18 | Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen |
JP51514698A JP2001504628A (ja) | 1996-09-27 | 1997-09-18 | 過熱に対して電気装置を保護するための装置 |
US09/269,525 US6222715B1 (en) | 1996-09-27 | 1997-09-18 | System for protecting electrical devices against overheating |
BR9711577A BR9711577A (pt) | 1996-09-27 | 1997-09-18 | Instala-Æo para a prote-Æo de instala-{es el-tricas contra superaquecimento |
DK97909150T DK0928492T3 (da) | 1996-09-27 | 1997-09-18 | Indretning til beskyttelse af elektriske indretninger mod overophedning |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19639942A DE19639942C2 (de) | 1996-09-27 | 1996-09-27 | Thermische Sicherung |
DE19639942.4 | 1996-09-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998013846A1 true WO1998013846A1 (de) | 1998-04-02 |
Family
ID=7807194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/002111 WO1998013846A1 (de) | 1996-09-27 | 1997-09-18 | Einrichtung zum schutz von elektrischen einrichtungen gegen überhitzen |
Country Status (11)
Country | Link |
---|---|
US (1) | US6222715B1 (de) |
EP (1) | EP0928492B1 (de) |
JP (1) | JP2001504628A (de) |
KR (1) | KR20000048633A (de) |
CN (1) | CN1231759A (de) |
AT (1) | ATE198008T1 (de) |
BR (1) | BR9711577A (de) |
DE (2) | DE19639942C2 (de) |
DK (1) | DK0928492T3 (de) |
ES (1) | ES2153184T3 (de) |
WO (1) | WO1998013846A1 (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003041855A1 (en) * | 2001-11-15 | 2003-05-22 | Powerspan Corp. | Discharge reactor fuse link |
JP4119159B2 (ja) * | 2002-04-25 | 2008-07-16 | タイコ エレクトロニクス レイケム株式会社 | 温度保護素子 |
KR20040065342A (ko) * | 2003-01-13 | 2004-07-22 | 자화전자 주식회사 | 피티시소자 파괴시 진행성을 방지하기 위한 안전모드 구조 |
US7342770B2 (en) * | 2003-07-09 | 2008-03-11 | Maxwell Technologies, Inc. | Recyclable dry particle based adhesive electrode and methods of making same |
US7352558B2 (en) * | 2003-07-09 | 2008-04-01 | Maxwell Technologies, Inc. | Dry particle based capacitor and methods of making same |
US7508651B2 (en) | 2003-07-09 | 2009-03-24 | Maxwell Technologies, Inc. | Dry particle based adhesive and dry film and methods of making same |
US20060147712A1 (en) * | 2003-07-09 | 2006-07-06 | Maxwell Technologies, Inc. | Dry particle based adhesive electrode and methods of making same |
US7791860B2 (en) | 2003-07-09 | 2010-09-07 | Maxwell Technologies, Inc. | Particle based electrodes and methods of making same |
US20050250011A1 (en) * | 2004-04-02 | 2005-11-10 | Maxwell Technologies, Inc. | Particle packaging systems and methods |
US7920371B2 (en) | 2003-09-12 | 2011-04-05 | Maxwell Technologies, Inc. | Electrical energy storage devices with separator between electrodes and methods for fabricating the devices |
US7495349B2 (en) * | 2003-10-20 | 2009-02-24 | Maxwell Technologies, Inc. | Self aligning electrode |
US7027290B1 (en) | 2003-11-07 | 2006-04-11 | Maxwell Technologies, Inc. | Capacitor heat reduction apparatus and method |
US7180726B2 (en) * | 2003-11-07 | 2007-02-20 | Maxwell Technologies, Inc. | Self-supporting capacitor structure |
US7016177B1 (en) | 2003-11-07 | 2006-03-21 | Maxwell Technologies, Inc. | Capacitor heat protection |
US7203056B2 (en) * | 2003-11-07 | 2007-04-10 | Maxwell Technologies, Inc. | Thermal interconnection for capacitor systems |
US7090946B2 (en) | 2004-02-19 | 2006-08-15 | Maxwell Technologies, Inc. | Composite electrode and method for fabricating same |
US7384433B2 (en) | 2004-02-19 | 2008-06-10 | Maxwell Technologies, Inc. | Densification of compressible layers during electrode lamination |
US20050269988A1 (en) * | 2004-06-04 | 2005-12-08 | Maxwell Technologies, Inc. | Voltage balancing circuit for multi-cell modules |
US7440258B2 (en) | 2005-03-14 | 2008-10-21 | Maxwell Technologies, Inc. | Thermal interconnects for coupling energy storage devices |
US7492574B2 (en) | 2005-03-14 | 2009-02-17 | Maxwell Technologies, Inc. | Coupling of cell to housing |
JP2008508746A (ja) * | 2005-07-11 | 2008-03-21 | ジャーワ エレクトロニクス カンパニー リミテッド | セラミック素体の破壊時における伝播の防止のための安全装置 |
US8518573B2 (en) * | 2006-09-29 | 2013-08-27 | Maxwell Technologies, Inc. | Low-inductive impedance, thermally decoupled, radii-modulated electrode core |
US20080201925A1 (en) | 2007-02-28 | 2008-08-28 | Maxwell Technologies, Inc. | Ultracapacitor electrode with controlled sulfur content |
US20080314893A1 (en) * | 2007-06-25 | 2008-12-25 | Adair Joel E | Heating device with adjusting electrical contact |
US8174354B2 (en) * | 2010-07-23 | 2012-05-08 | Sensata Technologies Massachusetts, Inc. | Method and apparatus for control of failed thermistor devices |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1244474A (fr) * | 1959-09-24 | 1960-10-28 | Philips Nv | Fusible, notamment pour petits transformateurs |
DE1906101U (de) * | 1964-07-30 | 1964-12-10 | Licentia Gmbh | Ueberhitzungsschutz. |
DE2342015A1 (de) * | 1973-08-20 | 1975-03-27 | Danfoss As | Elektrische schaltanordnung mit ptc-widerstand |
GB2089570A (en) * | 1980-10-13 | 1982-06-23 | Murata Manufacturing Co | Combination starter-protector device |
DE3234826A1 (de) * | 1982-09-21 | 1984-03-22 | Loewe Opta Gmbh, 8640 Kronach | Thermo-sicherungselement |
US4728779A (en) * | 1985-09-27 | 1988-03-01 | Tdk Corporation | PTC heating device |
WO1995035577A2 (en) * | 1994-06-22 | 1995-12-28 | Littelfuse, Inc. | Improved dual element circuit protection device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4431983A (en) * | 1980-08-29 | 1984-02-14 | Sprague Electric Company | PTCR Package |
US5153555A (en) * | 1989-11-28 | 1992-10-06 | Murata Manufacturing Co., Ltd. | Electronic device comprising a plate-shaped electronic element and a support and overcurrent protector for the same |
DE4209542C2 (de) * | 1992-03-24 | 1995-07-06 | Roederstein Kondensatoren | Schmelzsicherung mit Federarm |
DE4219304C2 (de) * | 1992-06-12 | 1994-03-31 | Roederstein Kondensatoren | Zuverlässiges Überstrom-Schutzbauteil mit geringem Platzbedarf und einfachem Aufbau |
US5471035A (en) * | 1993-10-22 | 1995-11-28 | Eaton Corporation | Sandwich construction for current limiting positive temperature coefficient protective device |
JP3358677B2 (ja) | 1993-12-30 | 2002-12-24 | 内橋エステック株式会社 | 薄型ヒュ−ズ |
JPH07335408A (ja) * | 1994-06-10 | 1995-12-22 | Murata Mfg Co Ltd | 発熱電子部品 |
DE19514853C2 (de) * | 1995-04-26 | 1997-02-27 | Marcel Hofsaes | Temperaturwächter mit einem bei Übertemperatur schaltenden Bimetall-Schaltwerk |
US5708553A (en) * | 1996-07-18 | 1998-01-13 | Hung; Je | Automatic switching-off structure for protecting electronic device from burning |
-
1996
- 1996-09-27 DE DE19639942A patent/DE19639942C2/de not_active Expired - Fee Related
-
1997
- 1997-09-18 BR BR9711577A patent/BR9711577A/pt unknown
- 1997-09-18 KR KR1019990702574A patent/KR20000048633A/ko not_active Ceased
- 1997-09-18 DE DE59702740T patent/DE59702740D1/de not_active Expired - Fee Related
- 1997-09-18 WO PCT/DE1997/002111 patent/WO1998013846A1/de not_active Application Discontinuation
- 1997-09-18 CN CN97198332A patent/CN1231759A/zh active Pending
- 1997-09-18 JP JP51514698A patent/JP2001504628A/ja active Pending
- 1997-09-18 EP EP97909150A patent/EP0928492B1/de not_active Expired - Lifetime
- 1997-09-18 US US09/269,525 patent/US6222715B1/en not_active Expired - Fee Related
- 1997-09-18 ES ES97909150T patent/ES2153184T3/es not_active Expired - Lifetime
- 1997-09-18 AT AT97909150T patent/ATE198008T1/de not_active IP Right Cessation
- 1997-09-18 DK DK97909150T patent/DK0928492T3/da active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1244474A (fr) * | 1959-09-24 | 1960-10-28 | Philips Nv | Fusible, notamment pour petits transformateurs |
DE1906101U (de) * | 1964-07-30 | 1964-12-10 | Licentia Gmbh | Ueberhitzungsschutz. |
DE2342015A1 (de) * | 1973-08-20 | 1975-03-27 | Danfoss As | Elektrische schaltanordnung mit ptc-widerstand |
GB2089570A (en) * | 1980-10-13 | 1982-06-23 | Murata Manufacturing Co | Combination starter-protector device |
DE3234826A1 (de) * | 1982-09-21 | 1984-03-22 | Loewe Opta Gmbh, 8640 Kronach | Thermo-sicherungselement |
US4728779A (en) * | 1985-09-27 | 1988-03-01 | Tdk Corporation | PTC heating device |
WO1995035577A2 (en) * | 1994-06-22 | 1995-12-28 | Littelfuse, Inc. | Improved dual element circuit protection device |
Also Published As
Publication number | Publication date |
---|---|
JP2001504628A (ja) | 2001-04-03 |
KR20000048633A (ko) | 2000-07-25 |
ATE198008T1 (de) | 2000-12-15 |
DE19639942C2 (de) | 1999-07-01 |
DE59702740D1 (de) | 2001-01-11 |
DE19639942A1 (de) | 1998-04-02 |
DK0928492T3 (da) | 2001-03-05 |
CN1231759A (zh) | 1999-10-13 |
US6222715B1 (en) | 2001-04-24 |
ES2153184T3 (es) | 2001-02-16 |
EP0928492B1 (de) | 2000-12-06 |
BR9711577A (pt) | 1999-08-24 |
EP0928492A1 (de) | 1999-07-14 |
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