EP1454401A2 - Electric machine, especially an alternator for motor vehicles - Google Patents
Electric machine, especially an alternator for motor vehiclesInfo
- Publication number
- EP1454401A2 EP1454401A2 EP02802615A EP02802615A EP1454401A2 EP 1454401 A2 EP1454401 A2 EP 1454401A2 EP 02802615 A EP02802615 A EP 02802615A EP 02802615 A EP02802615 A EP 02802615A EP 1454401 A2 EP1454401 A2 EP 1454401A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing plate
- electrical machine
- heat
- minus
- machine according
- 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- Withdrawn
Links
Classifications
-
- 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
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- 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
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
Definitions
- the invention relates to an electrical machine, preferably a three-phase generator for motor vehicles, with a rectifier unit according to the preamble of claim 1.
- a rectifier unit In known three-phase generators for motor vehicles, a rectifier unit is usually mounted on the rear end face of the three-phase generator driven by the vehicle engine, which rectifies the three-phase AC voltage generated in the stator winding of the three-phase generator for charging an accumulator battery for the vehicle electrical system.
- the rectifier bridge circuit of the unit consists of several diode bridges, each with a minus diode and plus diode connected in series.
- the minus diodes are attached and contacted on the anode side on a common minus heat sink and the plus diodes are attached and contacted on the cathode side on a common plus heat sink, which at the same time forms a minus or plus connection plate.
- Their free ends are connected to the individual diode bridges via a switching connection. volume-switched and each connected to a phase connection of the stator winding on the input side.
- connection plates are attached to one another at the end on the rear end plate of the three-phase generator and are sandwiched and insulated.
- the connection plates are offset from one another in the area of their diodes in such a way that the diode connections for making the switching connections are accessible from the outside.
- the two connection plates are enlarged in such a way that they form heat sinks.
- the minus heat sink gives off the heat loss of the minus diodes through its flat support to the rear bearing plate of the machine, whereas the heat loss of the plus diodes is given off via the plus heat sink in an area of the heat sink provided with ventilation slots to the cooling air of the three-phase generator flowing through it is also drained off by the heat conductivity in the stack via the minus heat sink to the rear end shield.
- the known solutions have the disadvantage that the rectifier assembly has relatively large dimensions due to the design of the connection plates as a heat sink, so that only slight degrees of freedom remain for attaching the rectifier assembly to the rear end plate of the machine.
- the design of the connection plates as heat sinks with cooling air ducts is complex and due to the relatively large masses of the heat sinks, there is a risk of small relative movements between the rectifier parts with one another and between them and the end shield when vibrations or impacts occur, which leads to interruptions in the rectifier bridge circuit can.
- the aim of the present solution is to transfer the heat loss from the rectifier assembly to the cooling air of the machine in the most efficient manner in order to keep the dimensions of the rectifier assembly as small as possible.
- the electrical machine according to the invention with the characterizing features of claim 1 has the advantage over the prior art that the heat loss of the rectifier assembly is first distributed in a ring in the bearing plate of the machine from the minus connection plate via good heat conduction, from where it leads to the Breakthroughs located radially further inward are uniformly received there by the entire cooling air flow sucked in by the fan of the machine and passing through these breakthroughs.
- Intake air in the area of the end shield near the axis leads to efficient cooling of the rectifier unit, which is thus advantageously to be designed as a compact, exchangeable module with small dimensions.
- the annular section of the bearing plate is designed as a broad aluminum ring, preferably integrated in the bearing plate.
- the rear end shield is expediently made of injection molded aluminum.
- the rectifier assembly in a recess in the annular section on the outside of the end shield.
- the rectifier assembly is proposed for machines with relatively high limit temperatures of the end shield in a so-called hot application to attach a heat-distributing additional body to the end shield in a semicircle on the annular section of the bearing end.
- the rectifier assembly and / or the additional body is connected to the end shield or to the additional body via a heat-conducting film and / or a heat-conducting paste.
- the heat transfer coefficient increases opposite the arrangement of cooling fins.
- the openings be arranged in a grid shape in the end shield and designed as honeycomb-shaped ducts.
- the length of the shafts is determined by the thickness of the end shield in this area and the surface area required for heat dissipation by convection is to be optimized by the width and number of shafts.
- the minus and plus diodes of each diode bridge consist of semiconductor substrates which, with their connecting part inserted on the input side, form a stack lying between the plus and the minus connection plate, the stacks being arranged side by side and embedded in the insulating material.
- Figure 1 shows the circuit principle of a three-phase generator for
- FIG. 2 shows the rectifier assembly as a compact module in an enlarged view
- FIG. 3 shows a longitudinal section through the rear end of the three-phase generator with the novel end shield as the first exemplary embodiment
- Figure 4 shows a second embodiment of the rear bearing plate with the rectifier assembly in the top view
- Figure 5 shows the embodiment in longitudinal section.
- Figure 6 shows a third embodiment of a bearing plate with the rectifier assembly in plan view
- Figure 7 shows the longitudinal section.
- the three-phase generator 10 has a stator winding with the phase phases R, S and T, with each phase phase consisting of two coils connected in parallel with one another.
- the rectifier assembly 11 three diode bridges 13 made of two diodes connected in series are connected in parallel to form a rectifier bridge circuit.
- the diode bridges 13 are connected with their minus diodes 14 on the anode side to a common minus pole 15 and the plus diodes 16 are connected on the cathode side to a common plus pole 17, the minus pole and plus pole forming the direct current output of the three-phase generator 10 for supplying an accumulator battery in the vehicle electrical system.
- a connecting part 18 is inserted between the minus diode 14 and the plus diode 16 of each diode bridge 13. The end of a phase strand R, S, T of the stator winding 12 is connected to these connecting parts 18, which form the input of the rectifier unit 11.
- the rectifier assembly 11 forms a compact, exchangeable rectifier module in which the positive pole 17 is constructed as a positive connection plate and the negative pole 15 as a negative connection plate made of aluminum or another material with good flow and heat conductivity are.
- the minus diodes 14 and plus diodes 16 of each diode bridge 13 consist of semiconductor substrates which, with their connection part 18 arranged therebetween, form three stacks 19 arranged next to one another, each of which lies between the minus connection plate 15 and the plus connection plate 17 and are embedded in insulating material.
- FIG. 3 shows the rear end of the three-phase generator 10 in longitudinal section, the claw-pole rotor 20 of which is received in a known manner with its rotor shaft 21 in a bearing 22 on the rear bearing plate 23, this being from the bearing plate 23 protruding end of the rotor shaft 21 carries a slip ring assembly 24.
- the excitation winding of the claw pole rotor 20, not shown, is via the slip ring arrangement
- the rectifier assembly 11 is attached with its minus connection plate 15 to a heat-conducting, annular section 23a of the bearing plate 23 in a heat-conducting manner.
- a fan 28 is attached to the rear end face of the claw-pole rotor 20 and generates a cooling air flow 29 indicated by arrows when the three-phase generator is in operation.
- the cooling air is drawn in by the fan 28 in the region near the axis and blown radially outward past the rear winding head of the stator winding 12 through ventilation slots 30.
- the cooling air is initially through openings 31a on the
- the aluminum ring is also an integral part of the bearing plate 23.
- the rectification of the AC voltage in the three phase strands R, S and T by the diodes 14 and 16 in the rectifier unit 11 generates heat loss which is initially absorbed by the minus connection plate 15 and via it large-area support on the annular portion 23a of the bearing plate 23 is introduced into the bearing plate. Because of the good heat conduction, the heat loss is distributed evenly over the annular section 23a and flows from there radially inwards into the area 23b with the openings 27. The heat loss of the rectifier assembly 11 is now transferred to the walls of the openings 27 by convection Cooling air flowing through there and drawn in by fan 28 is emitted.
- the openings can be designed as bores or shafts with different cross-sections, the width of the openings 27 being selected such that the cooling air flowing through them generates a turbulent flow there for better heat dissipation.
- Breakthroughs 27 or shafts are created by the material thickness of the end shield 23 in this inner region 23b.
- FIGS. 4 and 5 show a further embodiment of the bearing plate 23, the openings in the inner region 23b surrounded by the ring-shaped section 23a with the rectifier assembly 11 being shaft-shaped shafts 27a. It can also be seen there that a connection connector 33 is arranged on the annular section 23a of the end shield 23 in order to produce the connections between the stator winding 12 of the three-phase generator and the input-side connection parts 18 of the rectifier assembly 11.
- connection parts 18 are located on the lower longitudinal side of the rectifier assembly 11. Over three in the Connection connectors 33 embedded, indicated by dashed lines, the three connection parts 18 at connection points 35 are each connected to two connection wires of a phase strand of the stator winding 12.
- FIGS. 6 and 7 show, as a further embodiment, the bearing plate 23 with the rectifier assembly 11, the stator winding 12 with its connecting wires 12a led out at the rear winding head through adjacent holes 36 of the bearing plate 23 in the region of the
- Rectifier assembly 11 passed through and are each directly connected to the connecting part 18 of a diode bridge 13 of the rectifier assembly 11.
- a so-called hot application is also provided on the end shield 23 for the rectifier assembly 11 in the event that the end shield of the alternator 11 already assumes a relatively high operating temperature due to high utilization and / or an unfavorable installation position in the engine compartment of the motor vehicle .
- the heat gradient is between the rectifier assembly 11 and the bearing plate 23 less than in the normal case, whereby the heat dissipation and distribution at the annular portion 23a of the bearing plate 23 is difficult.
- the rectifier assembly 11 is fastened on a heat-distributing, semicircular additional body 37, which has a flat back on the annular section 23a of the bearing plate 23 rests.
- a heat-conducting paste and possibly also a heat-conducting film 38 are inserted between these parts.
- the close-to-axis suction of the cooling air from the fan 28 of the three-phase generator 10 ensures that the radially exiting heated cooling air does not flow back into the suction area via a circulation. This is also supported by the protective cap 31 on the end face of the end shield.
- the connection connector 33 from FIG. 4 is omitted, as a result of which the number of individual components is reduced.
- the rear end shield 23 is electrically connected to the negative connection plate 15 of the rectifier assembly 11.
- a positive connection terminal can, for example, directly on the positive connection plate 17 of the
- Rectifier assembly 11 are attached or it is, for example, attached to the end shield 23 in an insulated manner and electrically connected to the positive connection plate via a busbar.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Synchronous Machinery (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10154870 | 2001-11-08 | ||
DE10154870A DE10154870A1 (en) | 2001-11-08 | 2001-11-08 | Electrical machine, preferably three-phase generator for motor vehicles |
PCT/DE2002/004170 WO2003039936A2 (en) | 2001-11-08 | 2002-11-08 | Electric machine, especially an alternator for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1454401A2 true EP1454401A2 (en) | 2004-09-08 |
Family
ID=7705043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02802615A Withdrawn EP1454401A2 (en) | 2001-11-08 | 2002-11-08 | Electric machine, especially an alternator for motor vehicles |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040232783A1 (en) |
EP (1) | EP1454401A2 (en) |
JP (1) | JP2005508130A (en) |
BR (1) | BR0213933A (en) |
DE (1) | DE10154870A1 (en) |
WO (1) | WO2003039936A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BG66108B1 (en) | 2007-04-16 | 2011-04-29 | Енчо Попов | Brushless alternator with a rotor having beak-shaped poles |
JP2009165294A (en) * | 2008-01-09 | 2009-07-23 | Mitsubishi Electric Corp | Totally enclosed fan-cooled motor |
DE102008051650A1 (en) * | 2008-10-14 | 2010-04-15 | Ksb Aktiengesellschaft | Anordbarer device on an electric motor |
CN102801249B (en) * | 2012-09-12 | 2015-02-04 | 中国船舶重工集团公司第七一二研究所 | Integrated end cover type motor air cooler |
CN114744813B (en) * | 2022-04-21 | 2023-03-14 | 瑞安市纪龙汽车电器有限公司 | Self-heat-dissipation starter |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3180771A (en) * | 1958-01-16 | 1965-04-27 | Iit Res Inst | Method of preparing rocket monopropellent compounds |
US3210618A (en) * | 1961-06-02 | 1965-10-05 | Electronic Devices Inc | Sealed semiconductor housings |
US3356914A (en) * | 1963-05-03 | 1967-12-05 | Westinghouse Electric Corp | Integrated semiconductor rectifier assembly |
US3573516A (en) * | 1969-04-23 | 1971-04-06 | Gen Electric | Rectifier bridge for use with an alternator |
US3684944A (en) * | 1971-07-09 | 1972-08-15 | Ni I Exi Aoromobilnogg Elecktr | Rectifier for an electric generator |
DE2933588A1 (en) * | 1979-08-18 | 1981-03-26 | Robert Bosch Gmbh, 70469 Stuttgart | RECTIFIER UNIT |
FR2473801A1 (en) * | 1979-12-13 | 1981-07-17 | Bosch Gmbh Robert | BLOCK OF DIODES |
JPS6036701B2 (en) * | 1979-12-14 | 1985-08-22 | 株式会社デンソー | Vehicle alternator |
US4606000A (en) * | 1985-03-27 | 1986-08-12 | General Motors Corporation | Bridge rectifier |
JP2661545B2 (en) * | 1993-07-15 | 1997-10-08 | 株式会社デンソー | Rotating electric machine |
US5473208A (en) * | 1994-06-08 | 1995-12-05 | Stihi; Edward | Cooling structure for alternator rectifier |
US5659212A (en) * | 1994-12-16 | 1997-08-19 | Electro-Dyn Choke Corporation | Rectifier assembly for automotive alternator |
US5812388A (en) * | 1995-12-13 | 1998-09-22 | Integral Automotive S.A. | Bridge rectifier for diode-rectified alternating current generator |
DE19705228A1 (en) * | 1997-02-12 | 1998-08-13 | Bosch Gmbh Robert | Electrical machine, preferably a three-phase generator with a rectifier unit |
US5998891A (en) * | 1997-08-19 | 1999-12-07 | Unit Parts Company | Alternator with an improved battery terminal assembly |
FR2827436B1 (en) * | 2001-07-16 | 2004-06-18 | Valeo Equip Electr Moteur | CURRENT RECTIFICATION ARRANGEMENT FOR ROTATING ELECTRIC MACHINES, ESPECIALLY ALTERNATORS FOR MOTOR VEHICLES |
-
2001
- 2001-11-08 DE DE10154870A patent/DE10154870A1/en not_active Withdrawn
-
2002
- 2002-11-08 WO PCT/DE2002/004170 patent/WO2003039936A2/en not_active Application Discontinuation
- 2002-11-08 EP EP02802615A patent/EP1454401A2/en not_active Withdrawn
- 2002-11-08 JP JP2003541998A patent/JP2005508130A/en active Pending
- 2002-11-08 BR BR0213933-2A patent/BR0213933A/en not_active Application Discontinuation
- 2002-11-08 US US10/485,653 patent/US20040232783A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO03039936A2 * |
Also Published As
Publication number | Publication date |
---|---|
BR0213933A (en) | 2004-08-31 |
JP2005508130A (en) | 2005-03-24 |
DE10154870A1 (en) | 2003-06-26 |
WO2003039936A3 (en) | 2003-08-14 |
US20040232783A1 (en) | 2004-11-25 |
WO2003039936A2 (en) | 2003-05-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0960464B1 (en) | Electric machine, preferably a three-phase generator with rectifier unit | |
DE69108942T2 (en) | Rectifier bridge arrangement for an alternator. | |
DE102007002160A1 (en) | Dynamo-electric machine for e.g. automobile, has semiconductor switching units fastened at cooling bodies to cool fastened units, and including semiconductor switching devices that are arranged at common cooling bodies | |
WO2003041243A1 (en) | Electrical machine, preferably an alternator for motor vehicles | |
EP1032967A1 (en) | Electrical machine, preferably a three-phase current generator with a rectifier unit | |
DE69703071T2 (en) | Electrical rotating machine with thermally conductive component | |
EP1401089A1 (en) | Electrical machine, formed as starter, generator or starter-generator for a vehicle | |
DE60101112T2 (en) | Cooling structure of an automotive alternator | |
DE102008019728A1 (en) | High-current rectifier module | |
DE4442867A1 (en) | Drive arrangement for a vehicle, in particular a road vehicle | |
DE102005059244A1 (en) | Self-rotating electrical machine for use in motor vehicle, includes heat dissipation device with cooling bodies, where switching devices are distributed and attached on cooling bodies | |
DE112015004606T5 (en) | Base surface for MOSFET module | |
DE112015004112T5 (en) | Electronic cooling tower of an axially extending electric machine | |
DE112013005796T5 (en) | Electric machine and attachment | |
DE112015000455T5 (en) | B + mounted integrated active rectifier electronics | |
DE102011051916A1 (en) | Cooling system of a rotating electric machine for vehicles | |
DE2407533A1 (en) | BRUSHLESS EXCITER SYSTEM WITH RECTIFIER ARRANGEMENT FOR AC GENERATORS | |
DE112015004094T5 (en) | Radially adjustable phase connection wire connection | |
EP2572442A2 (en) | Pole shoe | |
DE102013100166A1 (en) | Rotating electrical machine | |
EP1454401A2 (en) | Electric machine, especially an alternator for motor vehicles | |
DE102010064072A1 (en) | Carrier tooth for use in e.g. adjusting- or drive motor, for receiving wounded coil in motor car, has wounded coil arranged in front side of tooth, and heat conducting thermal film arranged on side surface of tooth | |
DE102012110928A1 (en) | Alternating current generator for vehicle, allows cooling air to flow along ribs from radially outer to inner sides of rectifier cell when fan rotates, and in air flow space formed on radially inner side of ribs in direction of fan | |
DE102010016930A1 (en) | Rotary electric machine for vehicles | |
DE102012112336A1 (en) | Terminal block, semiconductor device and vehicle-based rotating electric machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040608 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KEPPELER, DANA Inventor name: HAUSSMANN, HOLGER Inventor name: URBACH, PETER Inventor name: BRAUN, HORST Inventor name: HOEFS, ROLAND Inventor name: SCHOLZEN, HOLGER |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HAUSSMANN, HOLGER Inventor name: SCHOLZEN, HOLGER Inventor name: HOEFS, ROLAND Inventor name: URBACH, PETER Inventor name: KEPPELER, DANA Inventor name: BRAUN, HORST |
|
17Q | First examination report despatched |
Effective date: 20050209 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20050621 |