EP2059997A1 - Protection contre les surintensités d'un appareil à balais - Google Patents

Protection contre les surintensités d'un appareil à balais

Info

Publication number
EP2059997A1
EP2059997A1 EP07803077A EP07803077A EP2059997A1 EP 2059997 A1 EP2059997 A1 EP 2059997A1 EP 07803077 A EP07803077 A EP 07803077A EP 07803077 A EP07803077 A EP 07803077A EP 2059997 A1 EP2059997 A1 EP 2059997A1
Authority
EP
European Patent Office
Prior art keywords
current
overload protection
carrying
protection according
spring
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.)
Withdrawn
Application number
EP07803077A
Other languages
German (de)
English (en)
Inventor
Frank Reschnar
Steffen Huemmer
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 EP2059997A1 publication Critical patent/EP2059997A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
    • 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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/148—Slidably supported brushes

Definitions

  • the invention relates to a current overload protection of a brush apparatus of an electrical machine, in particular a starter of an internal combustion engine, with at least one, the power supply to the brushes serving fuse device.
  • a current overload protection of the aforementioned type is known, for example in the form of a fuse device in which a current-carrying fusible element, such as a wire, melts when exceeding a predetermined electrical current for a predetermined period of time and so an electrical circuit of the brush apparatus is interrupted.
  • the maximum permissible electric current is determined by the choice of the material of the melting element of the fuse device and the current-carrying cross section of the fuse.
  • the fuse device is prepared on a melting point intended for melting so that it at a
  • the fuse device has two electrical current-carrying elements which are electrically connected by means of at least one solder connection melting in the event of an overload.
  • solder connection melting in the event of an overload.
  • Such current overload protection is used in electrical machines such as in AC motors or DC motors, especially in starters (starter motors).
  • starter motors starter motors
  • the solder joint consists for example of soft solder with a melting temperature of 200 0 C. Due to the relatively low melting temperature, the cross section of the solder joint can be chosen relatively high.
  • the fuse device allows a high operational current under extreme loads, such as a cold start, but speaks clearly against the emergence of critical thermal situations. So dangerous operating conditions can be effectively avoided in many cases.
  • the use of soft solder allows tuning to different types of electrical machines. In a simple arrangement the two Strom arrangementelennente spaced apart and electrically connected in the non-triggered state of the fuse device only by the solder joint. If a certain temperature threshold is exceeded, which is determined by the choice of the solder used, the solder melts and the electrical connection is interrupted.
  • the two current-carrying elements are biased against each other by means of a spring device.
  • the current-carrying elements are in the untripped state, for example
  • the Fused fuse device only slightly spaced from each other and electrically connected to each other via the solder joint. If there is a melting of the solder joint, a spring force of the spring device ensures an increase in the distance between the two current-carrying elements.
  • the spring device is designed, for example, as an inherently elastic spring device arranged between the current-carrying elements, which deflects the current-carrying elements in the tripped state of the fuse device.
  • At least one insulating element is arranged between at least one of the current-carrying elements and the spring device.
  • the insulating member electrically separates the current-carrying member and the spring member from each other.
  • a separate insulating element is arranged between the current-carrying element and the spring device.
  • the current-carrying element and / or the spring device has at least one insulation element or is provided with an electrically insulating protective layer.
  • the spring device is designed as a compression spring.
  • a compression spring can apply a high spring force and has a constant spring constant over a wide temperature range.
  • an insulating element is arranged on at least one of the current-carrying elements, which leads and / or holds the spring device.
  • the insulating element has the task to electrically isolate the spring device and the insulating element associated with the current-carrying element.
  • the insulating element is shaped so that it holds the spring device on the current-carrying element or fixed and leads with respect to the other current-carrying element.
  • the insulating element has a recess and / or a projection for guiding and / or holding the spring device.
  • the insulating member has the task to electrically isolate the current-carrying element and the spring device, to guide the spring device or keep and liquid solder away from the spring.
  • two insulating elements may be provided, which form a closed housing of the spring device in the non-triggered state of the fuse device. If the fuse device is triggered, the spring device opens the housing and increases the distance between the two current-carrying elements. At the same time the housing prevents "sticking" of the spring device by liquid solder in the non-triggered state, since the bonding of the spring device a defined movement apart of the two current-carrying elements would no longer be guaranteed.
  • the first current-carrying element is connected directly to at least one brush line.
  • the brushes are directly connected to brush wires (brush wires).
  • the direct connection of the first current-carrying element to at least one of the brush lines avoids unnecessary current paths or unnecessary line elements.
  • the connection is in particular a welded joint.
  • the first current-carrying element connects the brush lines of one polarity.
  • the number of line elements is further reduced.
  • the first current-carrying element connects the brush lines of the plus brushes.
  • the second current-carrying element directly with at least one
  • Relay line is connected.
  • Such a relay line (wire to the relay) is also present in conventional brushes of trained as starters electric machines. Due to the direct connection of the second current-carrying element with this relay line, the number of live parts is kept low or further reduced. The connection is in particular a welded joint.
  • the two current-carrying elements connected by means of the solder connection form a ypsilon-shaped current-carrying device.
  • a one-piece, y-shaped current-carrying device (Y-rail) is also part of a conventional brush apparatus. This is, for example, a one-piece, galvanized piece of copper on which the two plus brushes and the line to the terminal "45" of the relay are welded in.
  • the two current-carrying elements according to the invention in the non-triggered state form a ypsilon-shaped current-carrying device by means of the solder connection it replaces the conventional Y-rail inventive fuse device and takes over all the functions of the conventional Y-rail.
  • solder joint each in an angled end portion and the spring means are each arranged on a central portion of the current-carrying elements. Due to the spatial separation of the solder joint of the insulating element of the spring means a "sticking" of the spring means is avoided by the solder.
  • FIG. 1 shows a part of a brush apparatus according to a first embodiment of an inventive current overload protection in the tripped state
  • FIG. 2 shows a second exemplary embodiment of a current overload protection in the non-triggered state
  • FIG. 3 is a diagram showing the relationship between voltage
  • FIG. 4 is a diagram showing the relationship between voltage
  • FIG. 1 shows a part of a brush apparatus 1 with a commutator 2, on the upper, represented area on both sides in each case a brush 3, 4 designed as a plus brush is arranged.
  • a brush 3, 4 designed as a plus brush is arranged above the commutator 2
  • two current-carrying elements 5, 6 are arranged above the commutator 2.
  • the first current-carrying element 5 has a middle section 7, to each of which an angled end region 8, 9 adjoins.
  • the first end portion 8 is connected to a brush line 10 of the first brush 3, the second
  • the second current-carrying element 6 arranged above the first current-carrying element 5 has an insulating element 8 which, like a part of the second current-carrying element 6 in the illustration of FIG. 1, is covered by a guide element 13 designed as a lead-through rubber. Therefore, only one of the first current-carrying element 5 facing lower end portion 14 and connected to a relay line 15 upper end portion 16 of the second current carrying region 6 is visible.
  • a spring device 18 designed as a compression spring 17 is arranged at the level of the middle section 7 and is guided by pins 19 of the current-carrying elements 5, 6.
  • the two current-carrying elements 5, 6 form with the already soldered solder joints a fuse device 20, wherein this is shown in the tripped state in FIG.
  • the brush apparatus shown is part of a trained as a starter electric machine. The starter is used to start an internal combustion engine.
  • the two Strom arrangement shows the current overload protection with the fuse device 20 in a second embodiment in the non-triggered state. Since the arrangement essentially corresponds to that of FIG. 1, only the differences will be discussed here.
  • the two Strom arrangement essentially corresponds to that of FIG. 1, only the differences will be discussed here.
  • the two Strom arrangement essentially corresponds to that of FIG. 1, only the differences will be discussed here.
  • the two Strom arrangement essentially corresponds to that of FIG. 1, only the differences will be discussed here.
  • the two Strom arrangement form a ypsilonförmige current-carrying device 21, wherein the first Strom arrangementelennent 5 is connected at its two end regions 8, 9 via a respective solder connection 22, 23 with the corresponding portions of the lower end portion 14 of the second current-carrying element 6.
  • the first current-carrying element 5 has in its central portion 7 and the second current-carrying element 6 in a central portion 24 of the lower portion 14 each have an insulating member 12, 25.
  • the insulating elements 12, 25 form in the non-triggered state of the fuse device 20 designed as a spring tap housing 26 in which the formed as a compression spring 17 spring means 18 rests.
  • the insulating member 25 is formed as a pot 27 and the insulating member 12 as a cover 28 with guide pins 19. If the solder of the soldered connections 22, 23 melts, the spring device 18 forces the two current-carrying elements 5, 6 apart (double-headed arrow 29).
  • the current overload protection may alternatively have a fuse device 20 which is connected in the negative voltage path with the minus brushes, not shown.
  • FIG. 3 shows the relationship between voltage U, current I, temperature T R at the relay line 15, torque M and rotational speed n of a starter whose fuse device 20 is triggered from idling operation.
  • This operating situation arises, for example, when the starter runs along with the internal combustion engine running.
  • Uo 12 V
  • the voltage U is in idle mode (in the time range of 100 s to 400 s) at about 11, 8 V
  • the starter receives a current of 50 A.
  • the temperature T R at the relay line 15 increases with time t.
  • the overload protection of the circuit is interrupted, whereby the current I to 0 A and the torque M drops to 0 Nm.
  • FIG. 4 shows the relationship between voltage U, current I, relay line temperature T R , torque M and speed n of one Starters, however, the fuse device 20 is triggered out of the short-circuit operation out.
  • the tripping time is between 2 s and 3 s.
  • the temperature T R of the relay line 15 decreases exponentially.
  • the diagrams show a rapid triggering of the current overload protection in the various operating situations, which can reliably prevent a critical thermal state of the starter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne une protection contre les surintensités d'un appareil à balais d'une machine électrique, notamment d'un démarreur d'un moteur à combustion interne, comprenant au moins un dispositif fusible servant à l'arrivée du courant vers les balais. Il est prévu que le dispositif (20) fusible présente deux éléments (5, 6) électriquement conducteurs reliés électriquement au moyen d'au moins une liaison (22, 23) brasée qui fond en cas de surcharge.
EP07803077A 2006-08-30 2007-08-30 Protection contre les surintensités d'un appareil à balais Withdrawn EP2059997A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006040661A DE102006040661A1 (de) 2006-08-30 2006-08-30 Strom-Überlastschutz eines Bürstenapparates
PCT/EP2007/059068 WO2008025829A1 (fr) 2006-08-30 2007-08-30 Protection contre les surintensités d'un appareil à balais

Publications (1)

Publication Number Publication Date
EP2059997A1 true EP2059997A1 (fr) 2009-05-20

Family

ID=38668714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803077A Withdrawn EP2059997A1 (fr) 2006-08-30 2007-08-30 Protection contre les surintensités d'un appareil à balais

Country Status (3)

Country Link
EP (1) EP2059997A1 (fr)
DE (1) DE102006040661A1 (fr)
WO (1) WO2008025829A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008011226A1 (de) * 2008-02-26 2009-08-27 Robert Bosch Gmbh Strom-Überlastschutz einer elektrischen Maschine
CN105720744B (zh) 2014-12-05 2020-06-09 法雷奥电机设备公司 设置有热保护系统的机动车辆起动器
DE102015211153A1 (de) 2015-06-17 2016-12-22 Robert Bosch Gmbh Schmelzsicherungsvorrichtung als Strom-Überlastschutz einer elektrischen Maschine
DE102015225762A1 (de) 2015-12-17 2017-06-22 Robert Bosch Gmbh Elektrische Sicherungsvorrichtung
DE102016225594A1 (de) 2016-12-20 2018-06-21 Seg Automotive Germany Gmbh Elektrische Maschine mit einer elektrischen Sicherungsvorrichtung
DE102017215253A1 (de) 2017-08-31 2019-02-28 Seg Automotive Germany Gmbh Elektrische Sicherungsvorrichtung
DE102017217335A1 (de) 2017-09-28 2019-03-28 Seg Automotive Germany Gmbh Verfahren zum Auslösen einer Sicherungseinrichtung einer elektrischen Maschine, sowie elektrische Maschine mit einer Sicherungseinrichtung
DE102017217337A1 (de) 2017-09-28 2019-03-28 Seg Automotive Germany Gmbh Verfahren zur Betätigung einer Sicherungseinrichtung einer elektrischen Maschine, sowie elektrische Maschine mit einer Sicherungseinrichtung
DE102017217333A1 (de) 2017-09-28 2019-03-28 Seg Automotive Germany Gmbh Elektrische Maschine mit einem elektrischen Leiter und mit einer elektrischen Sicherungseinrichtung

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
DE615943C (de) * 1935-07-16 Neumann Hochspannungs App G M Hochleistungssicherung mit Fluessigkeitsbewegung
DE525322C (de) * 1926-11-10 1931-05-22 Siemens & Halske Akt Ges Mehrfachsicherung
DE667438C (de) * 1934-02-14 1938-11-11 Siemens Schuckertwerke Akt Ges Schmelzsicherung fuer elektrische Apparate, insbesondere fuer Transformatoren
DE711072C (de) * 1939-01-17 1941-09-25 Jean Mueller Traege Schmelzleiteranordnung
GB648031A (en) * 1948-11-09 1950-12-28 Kenneth Eardley Beswick Improvements in or relating to electric fuses
GB747185A (en) * 1953-04-14 1956-03-28 A F Bulgin & Company Ltd Improvements in thermally-operated electrical circuit interruptors
DE1184407B (de) * 1961-11-08 1964-12-31 Kienzle Uhrenfabriken Ag Schmelzsicherung an elektromagnetisch aufgezogenen Uhren und Laufwerken
FR2583568A1 (fr) * 1985-06-14 1986-12-19 Seb Sa Coupe-circuit thermique.
US5982270A (en) * 1998-12-03 1999-11-09 Shop Vac Corporation Thermal fuse
DE10044081A1 (de) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Überlastschutz
EP1189252A1 (fr) * 2000-09-13 2002-03-20 Siemens Aktiengesellschaft Elément fusible, son procédé de fabrication et matériau de soudure
GB2385723B (en) * 2002-02-21 2004-07-07 Yazaki Corp Fuse and fuse production method
JP4443979B2 (ja) * 2003-09-12 2010-03-31 株式会社デンソー スタータ

Non-Patent Citations (1)

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Title
See references of WO2008025829A1 *

Also Published As

Publication number Publication date
WO2008025829A1 (fr) 2008-03-06
DE102006040661A1 (de) 2008-03-13

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