WO2017102836A1 - Dispositif électrique de sécurité - Google Patents

Dispositif électrique de sécurité Download PDF

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Publication number
WO2017102836A1
WO2017102836A1 PCT/EP2016/080990 EP2016080990W WO2017102836A1 WO 2017102836 A1 WO2017102836 A1 WO 2017102836A1 EP 2016080990 W EP2016080990 W EP 2016080990W WO 2017102836 A1 WO2017102836 A1 WO 2017102836A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
spring element
safety device
electrical safety
current path
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.)
Ceased
Application number
PCT/EP2016/080990
Other languages
German (de)
English (en)
Inventor
Mathias Fein
Mark Hellmann
Torsten Knorr
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.)
Robert Bosch GmbH
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
Publication of WO2017102836A1 publication Critical patent/WO2017102836A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby
    • 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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/27—Devices for sensing current, or actuated thereby

Definitions

  • Carbon brushes have a reduced cross-section or in busbars on the brush holder targeted locally reduces the cross section.
  • a publication which describes targeted bottlenecks is, for example, DE102010063688A1.
  • the bottleneck heats up.
  • the melting temperature of the material e.g., copper or steel
  • the known solutions described above are all based essentially on the principle of self-heating. Due to the power loss caused by the locally increased resistance, the temperature in the material increases. Only by the self-heating, the very high melting temperatures can be achieved. In contrast, there are solutions that are mainly based on foreign warming. By using soft solders, significantly lower melting temperatures can be achieved. For example, the melting temperature of the main component tin is 232 ° C.
  • DE102006040661A1 describes a starter in which the overload protection is realized in a two-part Y-shaped busbar by means of soft solder and a spring.
  • the two parts of the busbar are connected by means of a soft solder.
  • the soft solder melts at relatively low temperatures (e.g., 200 ° C), and a preloaded spring forces the two parts of the bus bar apart, thus breaking the circuit.
  • Disadvantage of this solution is that, in particular in starters according to DE 10 2009 002 725 AI no such Y-shaped busbar is available or no space is available for this purpose.
  • the installation location for the soft solder connection is relatively far away from the main heat source (contact surface brush / commutator), which makes it difficult to trigger at low currents and impairs the robustness of the function.
  • the copper strands or strands of the negative carbon brushes can be separated from a brush plate.
  • the strands are connected to a bus bar or brush plate using a soft solder. If the melting temperature of the soft salary is reached, the prestressed spring relaxes and the current path is interrupted.
  • this solution has the advantage that the point at which the soft solder is mounted as close as possible to the main heat source. This main heat source is the contact surface between the brushes and the commutator, the commutator surface. This ensures that the solder or soft solder is sufficiently heated even at low currents and can be melted after a sufficiently short time.
  • this solution is applicable to all types of busbars or brush plates, so also at all points where brushes are mounted on an electrically conductive contact partner. The usual welding is simply replaced by a soft solder connection.
  • the spring element which causes a tensile stress in the connecting material between the first conductor and the second conductor, is arranged in the current path.
  • the current path is formed between a first conductor and a busbar.
  • a solder is arranged between the spring element and the second conductor. This has the advantage, for example, that a surface which is relatively well defined by the surface condition is available for soldering, in particular soft soldering.
  • the first conductor, the spring element and the second conductor are arranged in a stack.
  • the solder is also arranged in the stack between the spring element and the second conductor.
  • the spring element projects laterally out of the current path, then an anchoring point for one end of the spring element can be positioned relatively freely and in accordance with the space conditions.
  • the spring element is designed as a leaf spring, then the spring element is particularly easy to design.
  • the flat shape of the leaf spring easily adaptable to environmental conditions / space conditions.
  • the spring element may be rectangular, or designed as a free-form bow or designed U-shaped. If the spring element is designed as a flat spring, for example leaf spring, it is easy to set a release force by providing a set bending load, which is preferably designed as a simple beam bend. It is particularly preferred that a first conductor is a plus-side line.
  • a minus brush is secured to a brush plate accordingly.
  • a main circuit of the electric machine would be interrupted.
  • the functions described above can be implemented both with brush holders with four carbon brushes and with brush holders with six carbon brushes. That is, in particular, for example, in a total of four carbon brushes two plus carbon brushes or two Minuskohbürsten are each hedged by the securing device according to the invention. In the case of a total of six carbon brushes, protection of, for example, three carbon brushes on the plus side or three carbon brushes on the minus side would be indicated.
  • FIG. 1 shows a starting device for an internal combustion engine with an electromagnetic starter relay for adjusting a starter pinion and for starting a starter motor, a first embodiment of a securing device, A second embodiment of a securing device.
  • the electric machine shown in Fig. 1 is a starting device 1 for an internal combustion engine and has a starter pinion 2, which is brought to start the internal combustion engine 4 in engagement with a ring gear 3 of the internal combustion engine.
  • the starter pinion 2 is mounted axially displaceably on a shaft 5 as indicated by the double arrow, wherein the starter pinion 2 is non-rotatably coupled to the shaft 5.
  • the starter pinion 2 is moved between a retracted non-functional position and an advanced engagement position with the ring gear 3 of the internal combustion engine 4 via a starter relay 6, which is electromagnetically formed and a bestrombare relay winding 7 and an armature 8 35 includes the energizing the relay winding 7 in this axially is involved.
  • the armature 8 is kinematically coupled via an engaging lever 9 with the starter pinion 2, so that the axial adjustment movement of the armature 8 between a rest position and an adjustment position in a corresponding axial adjusting movement of the starter pinion 2 between the non-functional position and the engaged position is used.
  • the rotating drive movement of the shaft 5 and the starter pinion 2 is generated by means of an electric starter motor 11 which is coupled via a planetary gear 12 with the shaft 5.
  • an electric starter motor 11 which is coupled via a planetary gear 12 with the shaft 5.
  • the starting device 1 is associated with a control or control device 10, via which the functions of the starter relay 6 and the starter motor 11 are controlled.
  • the electric circuit of the starter motor 11 is closed upon reaching the adjustment position by the adjusting movement of the armature 8, so that the starter motor 11 is in motion and rotates the shaft 5 and the starter pinion 2 drives ,
  • the closing of the circuit of the starter motor 11 is effected by the fact that the ker 8 is a switching element, the carrier of an electrically conductive contact bridge, adjusted against two mating contacts 13, 14 in the circuit, so that the mating contacts 13, 14 are electrically connected to each other via the contact bridge.
  • a portion of a brush apparatus 20 is shown in fragmentary form.
  • Part of this brush apparatus 20 is, for example, a bus bar 23, which is formed here, for example, annular.
  • At least one brush holder 26 is attached to this busbar 23.
  • a brush is used, which is not shown here.
  • the brush is electrically and mechanically connected to a first conductor 29.
  • This conductor 29 is particularly preferably designed as a stranded wire.
  • the conductor 29 is indirectly attached to the bus bar 23 with a non-brush end 32. This attachment point 35 is shown in FIG.
  • the busbar 23 is electrically connected to a positive pole of a starter battery, which is not shown here.
  • the brush which is electrically connected via the conductor 29, connected to the electrical positive potential.
  • the attachment point 35 is constructed as follows:
  • the busbar 23 is connected in a material-locking manner via a connecting material 38, which is preferably formed as solder, in particular as soft solder, to a spring element 41.
  • the spring element 41 is integrally connected to the one end 32 of the conductor 29.
  • the end 32 is welded onto a surface 43 of the spring element 41.
  • the spring element 41 preferably has an end on which or on which the conductor 29 is fastened or on which the attachment point 35 is arranged. At another end, which is designated by the reference numeral 45 in FIG. 2, the spring element 41 is anchored to the end 45 in an insulator 48.
  • This insulator 48 has a base plate 51, which rests on the busbar 23. This isolator 48 is firmly connected to the busbar 23 or the substrate by means of a snap connection or other form-fitting connection (not shown here). prevented.
  • the base plate 51 has two lateral edge portions 53 and 54, which serve for the lateral bordering of the strip-shaped spring element 41. At one end of the base plate 51, which is farthest from the attachment point 35, there is a further edge portion 56. This edge portion 56 overlaps as well as the two edge portions 53 and 54, the sheet of the spring element 41. At the end 45 of the spring element 41 is further provided that two holes 58 in the spring element 41 engage in two pins 60. These pins 60 are formed integrally with the base plate 51.
  • one end of the spring element 41 is integrally connected.
  • the strip-shaped spring element 41 is initially free.
  • the end 45 of the spring element 41 is initially pushed in the course of assembly along the length between the two edge portions 53 and 54 along.
  • the two holes 58 in the spring element 41 are thereby pushed over the two mentioned pin 60 until they engage in the two holes 58.
  • the edge portion 56 engages over the end 45 of the spring element 41st
  • the end of the spring element 41 After insertion of the end 45 of the spring element 41 in the base plate 51, the end of the spring element 41, which carries the end 32 of the conductor 29, by means of the bonding material 38 is firmly bonded to the busbar 23. It can be seen from FIG. 2 that, by fastening the end 45 of the spring element 41 on the busbar 23, the spring element 41 is slightly deflected. That is, the spring member 41 is bent by the amount delta h. This bend causes tension in the bonding material 38. As can be seen from FIG. 2, the spring element 41 is consequently located in a current path 63.
  • the electrical fuse device 65 shown in Figure 2 has a first conductor 29 and a second conductor, which is designed here as a busbar 23.
  • the first conductor 29 and the second conductor are materially connected by the connecting material 38 electrically and mechanically. Accordingly, the current path 63 is formed between the first conductor 29 and the second conductor.
  • force F is a tensile stress.
  • the spring element 41 is arranged in the current path 63. As can also be seen from FIG. 2, the spring element 41 projects laterally out of the current path 63.
  • the spring element 41 is designed as a leaf spring.
  • the spring element 41 is arranged with one end in the current path 63 and is anchored to the other end 45 in the insulator 48. As described above, in the spring member 41 between the two ends, a bending load. Furthermore, it is described that the first conductor 29 is a feed line, which is preferably designed as a stranded wire. This supply line is a supply line for a brush of an electric machine, which is preferably designed as a starting device for internal combustion engines. The first conductor 29 is preferably a positive-side line and accordingly arranged between, for example, a commutator and a connection part, which is contacted at a positive pole of a starter battery. It is provided that the second conductor 23 is a brush plate on which a brush holder 26 is mounted, in which a brush is arranged. Incidentally, a brush is stylized around the electric starter motor 11 in FIG.
  • the spring element 41 is mechanically and electrically connected to the first conductor 29, preferably by means of a welded connection. It is generally important that the junction between the conductor 29 and the spring element 41 is thermally higher loadable than the connection point between the spring element and the conductor 23rd
  • FIG. 3 shows a second exemplary embodiment of such a securing device 65.
  • the differences from the embodiment of Figure 2 relate to the shape of the spring element 41 and the shape of the insulator 48. While the embodiment of Figure 2 shows a straight strip-shaped spring element 41, the spring element 41 according to the embodiment of Figure 3 is U-shaped. As can be clearly seen in comparison with Figure 2, the two embodiments have different extents in two axial directions. While the embodiment of Figure 2 is relatively long and narrow, on the other hand, the embodiment of Figure 3 is relatively short and a little wider. Depending on whether the space available for a safety device 65 is rather long and narrow or short and wide, the speaking embodiment of the safety device 65 can be selected.
  • Gur 3 has at a first leg 70, the attachment point 35.
  • a second leg 73 serves to at least partially absorb the already mentioned bending load in the spring element 41.
  • the end 45 is inserted into the already mentioned insulator 48.
  • This end 45 is inserted in an annular receptacle 76 of the insulator 48.
  • the spring element 41 is slightly bent, so that between the attachment point 35 and the receptacle 76, a deflection of the spring element 41 is set by a predetermined amount delta h.

Landscapes

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

Abstract

L'invention concerne un dispositif électrique de sécurité (65) comportant un premier conducteur (29) et un deuxième conducteur (23), qui sont reliés entre eux électriquement et mécaniquement par liaison de matière par un matériau de liaison (38) de sorte qu'il y a un chemin de courant (63) entre le premier conducteur (29) et le deuxième conducteur (23), un effort de tension opérant dans le matériau de liaison (38) par une force (F) agissant par un élément élastique (41). Ledit dispositif électrique de sécurité est caractérisé en ce que l'élément élastique (41) est disposé dans le chemin de courant (63).
PCT/EP2016/080990 2015-12-17 2016-12-14 Dispositif électrique de sécurité Ceased WO2017102836A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015225762.2A DE102015225762A1 (de) 2015-12-17 2015-12-17 Elektrische Sicherungsvorrichtung
DE102015225762.2 2015-12-17

Publications (1)

Publication Number Publication Date
WO2017102836A1 true WO2017102836A1 (fr) 2017-06-22

Family

ID=57755252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/080990 Ceased WO2017102836A1 (fr) 2015-12-17 2016-12-14 Dispositif électrique de sécurité

Country Status (2)

Country Link
DE (1) DE102015225762A1 (fr)
WO (1) WO2017102836A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108462325A (zh) * 2018-05-03 2018-08-28 河北工业大学 一种自助越障式过载保护装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017217333A1 (de) * 2017-09-28 2019-03-28 Seg Automotive Germany Gmbh Elektrische Maschine mit einem elektrischen Leiter und mit einer elektrischen Sicherungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020093259A1 (en) * 2001-01-16 2002-07-18 Calsonic Kansei Corporation Brushless motor
DE202008000975U1 (de) * 2007-01-24 2008-04-03 Gate S.R.L. Bürstenhalter für eine elektrische Maschine mit Kollektor und insbesondere für einen Gleichstrommotor
DE202010002664U1 (de) * 2010-02-23 2011-07-12 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotor zum Antrieb einer Kraftfahrzeugkomponente

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2248865T3 (es) * 1998-08-14 2006-03-16 Renata Ag Cortacircuitos y bateria que comporta este cortacircuitos.
DE102006040661A1 (de) 2006-08-30 2008-03-13 Robert Bosch Gmbh Strom-Überlastschutz eines Bürstenapparates
WO2010112389A1 (fr) * 2009-04-01 2010-10-07 Continental Automotive Gmbh Circuit pour moteur sans balais, et procédé de mise en oeuvre de ce circuit
DE102009002725A1 (de) 2009-04-29 2010-11-04 Robert Bosch Gmbh Bürstenapparat für eine elektrische Maschine sowie elektrische Maschine
DE102010063688A1 (de) 2010-12-21 2012-06-21 Robert Bosch Gmbh Bürstenapparat für eine elektrische Maschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020093259A1 (en) * 2001-01-16 2002-07-18 Calsonic Kansei Corporation Brushless motor
DE202008000975U1 (de) * 2007-01-24 2008-04-03 Gate S.R.L. Bürstenhalter für eine elektrische Maschine mit Kollektor und insbesondere für einen Gleichstrommotor
DE202010002664U1 (de) * 2010-02-23 2011-07-12 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotor zum Antrieb einer Kraftfahrzeugkomponente

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108462325A (zh) * 2018-05-03 2018-08-28 河北工业大学 一种自助越障式过载保护装置
CN108462325B (zh) * 2018-05-03 2023-08-15 河北工业大学 一种自助越障式过载保护装置

Also Published As

Publication number Publication date
DE102015225762A1 (de) 2017-06-22

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