WO2002054433A1 - Fusible electrique pour machines electriques - Google Patents

Fusible electrique pour machines electriques Download PDF

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Publication number
WO2002054433A1
WO2002054433A1 PCT/DE2001/004084 DE0104084W WO02054433A1 WO 2002054433 A1 WO2002054433 A1 WO 2002054433A1 DE 0104084 W DE0104084 W DE 0104084W WO 02054433 A1 WO02054433 A1 WO 02054433A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
electrical
support body
fuse according
electrical fuse
Prior art date
Application number
PCT/DE2001/004084
Other languages
German (de)
English (en)
Inventor
Walter Csiscer
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP01272608A priority Critical patent/EP1346389B1/fr
Priority to DE50115302T priority patent/DE50115302D1/de
Publication of WO2002054433A1 publication Critical patent/WO2002054433A1/fr

Links

Classifications

    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • 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
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified

Definitions

  • the invention relates to an electrical fuse for electrical machines, in particular for three-phase generators with a rectifier arrangement for supplying a
  • Three-phase generators are usually integrated into a rectifier arrangement, so that only their direct current output form the connecting terminals of the generator, to which the connecting cables of an accumulator battery of the motor vehicle electrical system are connected.
  • a rectifier arrangement In the event of an overload or a short circuit on the generator or on the rectifier arrangement, which often occur in motor vehicles when a battery charger is incorrectly polarized on the discharging battery not only can the generator or the rectifier arrangement be destroyed, but it can also cause further consequential damage to the vehicle.
  • the aim of the present invention is to provide protection of the generator and the rectifier arrangement against electrical overload or short-circuit as simply and reliably as possible.
  • the electrical fuse according to the invention with the characterizing feature of main claim 1 has the advantage that when the fuse responds, the generator with the rectifier arrangement is completely switched off, and thus the response of the fuse can be clearly recognized by the interruption of the charging process. Another advantage is that when connecting a battery charger with incorrect polarity, it is no longer necessary - as before - to respond to all three fuses in the three rectifier bridges, but that the generator is completely disconnected from the vehicle electrical system by responding to one fuse, thereby reducing the risk of overheating is prevented.
  • Securing element between a heat sink forming the positive pole of the bridge rectifier and a positive connecting bolt of the generator is arranged.
  • the plus connecting bolt is insulated and detachably fastened in a hole in the plus heat sink.
  • the plus connecting bolts, insulating part and securing element form a prefabricated structural unit, in that the securing element is galvanically connected to it with its one connection on the end face of the connecting bolt head, preferably welded to it. In this case, the complete assembly is changed after the fuse has tripped.
  • the collar of the insulating part which surrounds the connecting bolt is attached, the upper side of which connection makes pressure contact with the plus heat sink when the connecting bolt is tightened.
  • a very simple manufacture of the fuse element can be achieved in that it is a metallic stamped part which, between its two connections, has a section which is bordered on the side of the head of the positive connecting bolt and is narrowed in cross section and melts away in the event of an overload.
  • an insulating washer is advantageously placed on the plus connection pin above the plus heat sink, so that the heat sink is known per se compared to one on the connection pin Way to isolate the attached protective cap.
  • the constructive solution can expediently also be designed such that only the securing element has to be replaced after the response.
  • the positive connection pin carries an insulating part enclosing its head region and protrudes through the hole of the positive heat sink, the securing element being placed on the positive connection pin such that it rests with its lower connection on the positive heat sink and with its upper one Connection is made by means of a nut with the plus connecting bolt.
  • the securing element is formed from an annular, disk-like insulating support body, which carries an annular disk-shaped connection of the securing element on each of its two end faces, with a section with a narrowed cross-section that leads past the insulating support body and melts away in the event of an overload between the two connections.
  • this section In order to be able to secure the section that melts away when the fuse responds in a predetermined position in a rotationally and positionally secure manner on the plus connecting bolt, this section is guided around a plate-shaped projection formed laterally on the insulating support body, which surrounds the section on both sides. In addition, this projection is fixed on both sides by lugs, which are molded onto the plus heat sink.
  • the insulating support body Since this fuse element can also be placed on the market as a spare part, the insulating support body must not fall out between the two connections of the fuse element before installation.
  • the two ring-shaped connections surround the insulating support body on its outer edge in each case by angled tongues.
  • FIG 1 shows the circuit of the three-phase generator with the
  • Rectifier arrangement and the fuse Figure 2 as the first embodiment, the plus connecting bolt with fuse as a preassembled unit and Figure 3 is a sectional view of the plus connecting bolt mounted on the plus heat sink with the fuse, Figure 4 as a second embodiment, a cross section of the rectifier arrangement in the region of the plus - connecting bolt,
  • FIG. 5 is a spatial representation of the securing element which is non-rotatably placed on the plus connecting bolt
  • FIG. 6 is a partial section of a variant of the second exemplary embodiment according to FIG. 4,
  • FIG. 7 shows, as a third exemplary embodiment, a cross section of the rectifier arrangement in the region of the plus connecting bolt
  • FIG. 7a shows a variant of the melting section according to FIG. 7 in partial section
  • FIG. 8 shows, as a fourth exemplary embodiment, a cross section of the rectifier arrangement in the region of the plus connecting bolt
  • FIG. 9 shows the securing element according to FIG. 8 in a spatial representation.
  • FIG. 1 the three phases 10 of a three-phase generator are shown, with one end to one Star circuit together and connected at their other end to a diode bridge 11, 12 and 13 of a rectifier arrangement 14.
  • a circuit board 15 is used to interconnect the three phases 10 with the three diode bridges, each of the three diode bridges consisting of a negative diode 16 and a positive diode 17 connected in series.
  • the minus diodes 16 are pressed into a minus heat sink 18 on the anode side and the anode connections of the minus diodes 16 are thus combined by the minus heat sink 18 to form a minus connection 19.
  • the plus diodes 17 are pressed into a plus heat sink 20 on the cathode side.
  • the cathode connections of the plus diodes 17 are combined in this heat sink 20 and connected to a plus connection 22 of the rectifier arrangement 14 via a fuse element 21.
  • Fuse element 21 is dimensioned such that it melts to protect the generator and the rectifier diodes 16, 17 when the permissible maximum direct current is exceeded and interrupts the circuit on the generator side. This can happen, for example, through incorrect polarity when connecting a battery charger.
  • FIG. 2 shows a preassembled unit 24 comprising a plus connecting pin 25, an insulating part 26 shown in section and the securing element 21.
  • the plus connecting pin 25 forms a connecting terminal 60 of the three-phase generator for the plus connecting cable of an accumulator in the vehicle electrical system of a motor vehicle.
  • the insulating part 26 is designed such that it surrounds the head 27 of the connecting bolt 25. It is also provided with a collar 26a which surrounds the shaft 25a.
  • the securing element 21 is pushed onto the plus connecting pin 25 together with the insulating part 26 and is electrically contacted on the end face 27a of the head 27 by having its lower connection 29 on the Face 27a of the head 27 is welded.
  • the securing element 21 is a metallic stamped part which, between its two connections 29, 30, has a section 31, which is bordered laterally on the head 27 of the plus connecting bolt 25 by the insulating part 26 and which melts away in cross section and melts away in the event of an overload.
  • the shaft 25a of the connecting bolt 25 protrudes in isolation through a hole 33 of the plus heat sink 20, the collar 26a of the insulating divider 26 protruding into the hole 33 and also the lower edge 33a of the hole 33 on the top of the upper connection 30 of the Securing element 21 rests.
  • the upper edge 33b of the hole 33 carries an insulating ring 34, on which the protective cap 32 with an injected clamping disk 36 is supported via a spring washer 35. The parts are clamped together by a nut 37 placed on the plus connecting bolt 25.
  • the plus heat sink 20 is pressure-contacted on the one hand to the upper connection 30 of the securing element 21 and on the other hand insulated by the insulating ring 34 with respect to the clamping disk 36 of the protective cap 32 and thus also with respect to the nut 37 and the connecting bolt 25 in order to avoid electrical bridging of the securing element 21 ,
  • the fuse element 21 is arranged in a line string carrying the entire generator current between the rectifier arrangement 14 and a connecting terminal 60 of the generator formed by the plus connecting pin 25, the fuse element 21 can be arranged in the If the device responds in the event of an overload, replace it easily. Since the positive connection pin 25 is detachably fastened in the positive heat sink 22, the entire structural unit 24 according to FIG. 2 can be replaced in this case.
  • the securing element 40 is designed such that it is interchangeable after the response.
  • the plus connecting bolt 25 is also enclosed in its head region 27 by an insulating part 41, which projects with a collar 41a into the hole 33 in the plus heat sink 20.
  • the securing element 40 is placed here on the end of the plus connecting bolt 25 projecting through the hole 33 in such a way that its lower connection 29 rests on the plus heat sink 20.
  • the securing element 40 here consists of an annular, disk-like insulating support body 43, with an annular disk-shaped connection 29, 30 on each of its two end faces and a melting section 31a with a narrowed cross section that passes between the two connections 29, 30 and melts away in the event of an overload. From the spatial representation according to FIG. 5 shows that the melting section 31a is guided around a plate-shaped projection 43a which is formed laterally on the insulating support body 43 and which surrounds the melting section 31a on both sides. To fix the position of the securing element 40 on the plus connecting bolt 25, two lugs 44 are formed on the plus heat sink 20, which surround the projection 43a of the insulating support body 43 on both sides and thus against rotation. In addition, the parts of the securing element 40 are held together in that the two annular disk-shaped
  • Connections 29 and 30 each enclose the insulating support body 43 by angled tongues 45.
  • the position fixing of the securing element 40 has the advantage that it can be ensured that the
  • Melting section 31a does not come into contact with metallic components of the rectifier arrangement and the safety function would thus be bridged. Furthermore, this prevents the melting section 31a from coming into contact with temperature-sensitive materials, for example with the protective cap 32, and finally the position fixing enables the rectifier arrangement to be transported with the securing element 40 attached without changing its position.
  • the distance between the two noses 44, which are to be designed in any cross-sectional shape, on the plus heat sink 20, is to be selected so that the securing element 40 with its projection 43 a can be used without restriction in the joining direction between the two noses 44. This position fixation is possible without additional components, since they can be worked out from an existing mold for the Plus heat sink with simple tools.
  • FIG. 6 shows an alternative solution, in which the projection 43a on the insulating support body 43 is omitted.
  • the securing element 40a is here placed in a ring on the positive connection bolt 25 and firmly clamped between the positive heat sink 20 and the contact disk 42 by the nut 37. Its melting section 31a can sit anywhere on the circumference of the insulating support body 43.
  • FIG. 7 shows a further exemplary embodiment of the securing element 40 according to the invention.
  • the securing element 40 is constructed similarly to the previous exemplary embodiments.
  • the securing element 40 also has an insulating support body 43 here, which has two axial sides. Arranged on its underside is an annular lower connection 29, which is connected in one piece via the melting section 31a to the upper connection 30, which is located on the upper side of the insulating support body 43. Both connections 29 and 30 are arranged concentrically around the connection bolt 25 or its shaft 25a. The insulating support body 43 is inserted between the two connections 29 and 30.
  • the insulating support body 43 has a collar 26b which extends in the axial direction and surrounds the shaft 25a with a hollow cylindrical shape. This collar 26b thereby prevents the upper connection 30 from contacting the shaft 25a.
  • the collar 26b is integrally connected to an insulating plate 26c.
  • the insulating plate 26c separates the two connections 29 and 30.
  • the lower connection 29 lies here on a spacer 46 and is electrically contacted with this.
  • the spacer 46 is designed as a nut 37.
  • the spacer 46, or the nut 37 abuts the plus heat sink 20.
  • the spacer 46, or the nut 37 forms the connection terminal 60. With the nut 37, the connection bolt 25 is clamped to the plus heat sink 20.
  • connection 30 which thus represents the positive connection 22 of the rectifier arrangement 14.
  • connection end 50 of a conductor 70 which can be connected to the electrical machine and which is clamped to the spacer 46 or the nut 37 via the insulating ring 34 by means of a keel nut 52 which represents a fastening element 80.
  • the connection end 50 is the generator-side end of an electrical cable between the generator and a vehicle battery.
  • a short circuit of the securing element 40 is prevented by the insulating ring 34.
  • the collar 26b prevents a short circuit between the live connection pin 25 or the shaft 25a and the connection end 50.
  • Figure 7a shown, necessary to first lead from the lower connection 29 from the melting section 31a with its two legs 90 and 91 in the axial direction towards the plus heat sink 20 and in a U-shaped bend back towards the gill nut 52, where it ends in the upper connection 30 as already described.
  • the illustration of the melting section 31a shown in FIG. 7 bears a great similarity to the melting section according to FIG.
  • the further exemplary embodiment shown in FIG. 8 differs only slightly from that shown in FIG.
  • the structure of the securing element 40 is essentially the same, although here the sheet metal part which represents the actual securing, formed from the lower connection 29, the melting section 31a and the upper connection 30, also surrounds an insulating support body 43, but this is injected around or into the sheet metal part is.
  • the insulating support body 43 is ring-shaped and surrounds an outer edge of the insulating support body 43 like a ring. This is another measure to keep the contact
  • FIG. 9 shows the securing element 40 with the insulating support body 43 and the sheet metal part having the melting section 31.
  • the Insulating support body 43 has two substantially annular rims 54 at the upper connection, each of which extends over a certain circumferential section on the insulating support body 43. Both shelves 54 are spaced apart and can between them

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un fusible électrique pour machines électriques, notamment pour alternateurs à courant triphasé comportant une connexion positive (22). Ledit élément de protection (40) peut être monté entre une borne d'alimentation (60) de la machine électrique et une extrémité de connexion (50) d'un conducteur (70) raccordable à la machine électrique.
PCT/DE2001/004084 2000-12-29 2001-10-27 Fusible electrique pour machines electriques WO2002054433A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01272608A EP1346389B1 (fr) 2000-12-29 2001-10-27 Fusible electrique pour machines electriques
DE50115302T DE50115302D1 (de) 2000-12-29 2001-10-27 Elektrische sicherung für elektrische maschinen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000165301 DE10065301A1 (de) 2000-12-29 2000-12-29 Elektrische Sicherung für elektrische Maschinen
DE10065301.4 2000-12-29

Publications (1)

Publication Number Publication Date
WO2002054433A1 true WO2002054433A1 (fr) 2002-07-11

Family

ID=7669191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/004084 WO2002054433A1 (fr) 2000-12-29 2001-10-27 Fusible electrique pour machines electriques

Country Status (3)

Country Link
EP (1) EP1346389B1 (fr)
DE (2) DE10065301A1 (fr)
WO (1) WO2002054433A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015111885A1 (de) * 2015-07-22 2017-01-26 Kromberg & Schubert Gmbh Sicherung für Stromverteiler

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1520744A (fr) * 1967-03-02 1968-04-12 Ducellier & Cie Coupe-circuit à fusible et prise de courant pour sa connexion
DE1463143A1 (de) * 1964-10-19 1969-01-02 Essex Wire Corp Schmelzsicherung
EP0282025A2 (fr) * 1987-03-11 1988-09-14 Kabushiki Kaisha Toshiba Dispositif semi-conducteur comprenant un fusible
DE9409851U1 (de) * 1994-06-22 1994-08-04 Wilhelm Pudenz GmbH, 27243 Dünsen Sicherungssystem zur Absicherung von elektrischen Stromkreisen vorzugsweise in Fahrzeugen
WO2001050577A1 (fr) * 1999-12-29 2001-07-12 Robert Bosch Gmbh Fusible electrique pour alternateurs a courant triphase avec redresseur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1463143A1 (de) * 1964-10-19 1969-01-02 Essex Wire Corp Schmelzsicherung
FR1520744A (fr) * 1967-03-02 1968-04-12 Ducellier & Cie Coupe-circuit à fusible et prise de courant pour sa connexion
EP0282025A2 (fr) * 1987-03-11 1988-09-14 Kabushiki Kaisha Toshiba Dispositif semi-conducteur comprenant un fusible
DE9409851U1 (de) * 1994-06-22 1994-08-04 Wilhelm Pudenz GmbH, 27243 Dünsen Sicherungssystem zur Absicherung von elektrischen Stromkreisen vorzugsweise in Fahrzeugen
WO2001050577A1 (fr) * 1999-12-29 2001-07-12 Robert Bosch Gmbh Fusible electrique pour alternateurs a courant triphase avec redresseur

Also Published As

Publication number Publication date
DE50115302D1 (de) 2010-02-25
EP1346389A1 (fr) 2003-09-24
DE10065301A1 (de) 2002-07-04
EP1346389B1 (fr) 2010-01-06

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