EP1046218A1 - Electric machine, especially a three-phase generator, with an exciter - Google Patents

Electric machine, especially a three-phase generator, with an exciter

Info

Publication number
EP1046218A1
EP1046218A1 EP99970518A EP99970518A EP1046218A1 EP 1046218 A1 EP1046218 A1 EP 1046218A1 EP 99970518 A EP99970518 A EP 99970518A EP 99970518 A EP99970518 A EP 99970518A EP 1046218 A1 EP1046218 A1 EP 1046218A1
Authority
EP
European Patent Office
Prior art keywords
exciter
generator
armature
together
claw
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Withdrawn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
EP99970518A
Other languages
German (de)
French (fr)
Inventor
Istvan Ragaly
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
Priority to DE29818190U priority Critical
Priority to DE29818190U priority patent/DE29818190U1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PCT/DE1999/003194 priority patent/WO2000022719A1/en
Publication of EP1046218A1 publication Critical patent/EP1046218A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02Details
    • H02K21/04Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H02K21/042Windings on magnets for additional excitation ; Windings and magnets for additional excitation with permanent magnets and field winding both rotating
    • H02K21/044Rotor of the claw pole type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/04Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/042Rectifiers associated with rotating parts, e.g. rotor cores or rotary shafts
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K19/00Synchronous motors or generators
    • H02K19/16Synchronous generators
    • H02K19/38Structural association of synchronous generators with exciting machines

Abstract

An electric machine, especially a three-phase generator, with an exciter (26) in the form of a claw-pole machine that delivers a required exciting current for a generator. The exciter is arranged to the side of the generator and its dimensions are substantially smaller than those of the latter. Permanent magnets (39) are arranged close to the claws (28,29) of the stator (28,29) facing the armature (32) of the exciter in a magnetic dispersion area in between said claws, thereby enabling undesirable stray fields to be terminated.

Description

Electrical machine, in particular three-phase generator with exciter

State of the art

The invention relates to an electrical machine, in particular an alternator with an exciting machine according to the preamble of the main claim. Such an alternator is known from DE-OS 15 13 850. In this way, one obtains a generator with a relatively long life because slip rings and carbon brushes omitted and there is no voltage drop at the carbon brushes in the exciting circuit is obtained. In the conventional alternator with exciter whose performance is, however, not yet been fully exploited due to leakage flows that occur between the claw poles of the stator of the exciter.

Advantages of the Invention

In contrast, the alternator according to the invention with the characterizing features of the invention has the advantage that a leakage flux is counteracted between the claws and additional permanent magnetic flux is formed, whereby the power of the excitation machine is increased advantage. Further advantages of the invention will be apparent from the dependent claims, the following description and drawings.

drawing

1 shows half a longitudinal section through a three-phase generator with exciter for a motor vehicle, Figure 2 shows a development of the Klaupenpole, Fig. 3 is a half section through the exciting machine, and Fig. 4 is a circuit diagram for the generator with exciter.

Description of the embodiment

In figure 1, 10, the approximately pot-shaped housing of an alternator referred to at the bottom of a hub 11 is formed in which a ball bearing for which is one end of a generator shaft 13, 12 closing the other end in a ball bearing 14 of the housing the lid is mounted 15th However, the generator shaft 13 still projects beyond the housing, wherein a V-belt pulley 16 is arranged on this part. The lid 15 with further parts situated there, such as rectifier 17 and regulator 27 for controlling the electric currents are not shown further, so-called, with the exception. Positive diodes 17A (s. Also descriptive diagram of FIG. 4).

Approximately in the middle of the housing 10, a stator core 18 is fixed with a stator winding 19 on its inner wall. Within the same to a claw-pole rotor 20 is located with Klauenpolhälften 21, 22 by a generator shaft 13 which surrounds the pole core 23 are connected together. The bent alternately from one side and the other claw of the claw poles halves engage around a winding configured as an annular exciting coil 24. The claw-pole rotor 20 including pole core 23 are rotatably connected to the generator shaft. 13

In addition to the claw pole 20 a is

Exciter 26 which is also formed as in AußenpolSystem claw pole. The exciter is smaller in diameter than the generator. Two Klauenpolringe 28, 29 are fixedly arranged in the housing 10 between them is a fixed excitation winding 30th

Within the claw pole stator is rotationally fixed to the generator shaft 13 connected to the armature 31 of the exciter 26. An armature winding 32 is located in the grooves of the armature formed from a laminated core. The armature itself is located on a shaft rotating on the fixed cylindrical spacer 34, having an armature bearing collar 35th In the web 33 of the annular collar are situated in bores exciter diodes 36. On both sides of this web or of the annular collar 35 is a potting compound 37. Between the jaws 28 A, 29 A of the exciting machine are mounted permanent magnets. 39 The execution of this claw pole or Klauenpolringe 28, 29 is shown in FIG 2. There are each of the same poles of the permanent magnets and the claw each other. By this arrangement, undesirable leakage fields between the jaws is counteracted.

3 shows a half-section of the exciting machine comprising a laterally offset web 33 and thus slightly different trained spacer, which is denoted by 34A. Clearly also one of the permanent magnets 39 can be seen here.

According to Figure 4, the excitation winding 32 of the armature 31 of the exciting machine 26 suitably has a three-phase winding with a downstream three-phase bridge rectifier, as this circuit is very suitable for the optimum power output of the exciter and can be reached by their small dimensions. The minimum power of the exciting machine is set so that when

Engine idle speed, the nominal flux is ensured for the claw-pole rotor of the generator. The Ankernutisolation the exciter with Resicoat or thinner heat-resistant film is of advantage. The rear end windings of the armature coil 32 of the exciter may conveniently with a thin insulating disk 21 from Klauenpolsystem be isolated 22nd As already mentioned above that exciter diodes 36 of the exciting machine are fully sealed using high-temperature impregnation material, or high temperature resistant plastic.

The claws can also be performed by parallel, making the pole coverage and thus the power is increased. This only makes sense because the interdigital scattering is with the permanent magnets inserted between the jaws is reduced. can, if necessary, chamfers or withdrawals are attached. to the "running" edges of the jaws of AußenpolSystems the exciter The claw poles for the AußenpolSystem can cold-formed, hot forged, are cast or manufactured by machining.

Due to the excitation diodes 36 of the rotational current generated in the exciter is supplied as a direct current of the exciter winding 24 of the generator in a downstream three-phase bridge rectifier. This then produces a phase current, which is rectified via the rectifier bridge 17 and the battery and the loads of the vehicle electrical system is supplied in a conventional manner in the stator winding 19th This is in addition erläuter briefly at the circuit diagram of FIG. 4

The generator is connected in a conventional manner with its three-phase stator winding 19 in a star connection on the bridge rectifier 17th One phase of the stator winding 19 is set to a likewise known for the control of the excitation controller 27 which controls the current in the field coil 30 of the exciter 26 in response to the generated voltage of the generator. This current now turn, induces an electromotive force (EMF) in the three-phase winding 32 in the armature 31 of the exciting machine, which is rectified by means of the exciter diodes now the exciter winding 24 of the generator is supplied. Since the claw-pole rotor 20 of the generator, and the armature 31 of the exciter 26 sit together on the electrically conductive generator shaft 13, the negative pole of the rectifier bridge 36 and the excitation winding 24 can be connected to the shaft 13, so that only a line from the positive pole of the rectifier bridge 36 A to the energization coil 24 must be performed.

Claims

claims
1. Electrical machine, in particular three-phase generator, arranged with a in a casing (10) stand (18) together with the stator winding (19) and mounted with one on the generator shaft (13), cooperating with the stand claw-pole rotor (20) together with an excitation coil (24 and having a) on the side of the
Alternator subsequent exciter (26) are fixedly arranged on the generator shaft in claw pole construction for the rotary current generator, whose diameter and length are smaller than those of the alternator, and wherein the exciter provides the necessary for the alternator excitation current, and the armature (31) together with the armature winding (32) during which Klauenpolringe (28, 29) together with the exciter winding (30) in the housing (10) are fixed, characterized in that between the side facing the armature (31) of the exciter claws (28A, 29A) permanent magnets (39) are fixed and arranged in such a way that like poles of the permanent magnets (39) and the claws (2YA, 2GA) contact.
2. Machine according to claim 1, characterized in that the armature (31) of the exciter via a spacer (34) to the generator shaft (13) is connected.
3. Machine according to claim 1 and / or 2, characterized in that the spacer (34) exciter diodes
(36) are located.
4. Machine according to one of claims 1 to 3, characterized in that the excitation diodes (36) through an impregnating (37) of the spacer are insulated on both sides.
EP99970518A 1998-10-12 1999-10-05 Electric machine, especially a three-phase generator, with an exciter Withdrawn EP1046218A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE29818190U 1998-10-12
DE29818190U DE29818190U1 (en) 1998-10-12 1998-10-12 Electrical machine, in particular three-phase generator with exciter
PCT/DE1999/003194 WO2000022719A1 (en) 1998-10-12 1999-10-05 Electric machine, especially a three-phase generator, with an exciter

Publications (1)

Publication Number Publication Date
EP1046218A1 true EP1046218A1 (en) 2000-10-25

Family

ID=8063796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99970518A Withdrawn EP1046218A1 (en) 1998-10-12 1999-10-05 Electric machine, especially a three-phase generator, with an exciter

Country Status (6)

Country Link
US (1) US6362550B1 (en)
EP (1) EP1046218A1 (en)
JP (1) JP2002528033A (en)
BR (1) BR9906867A (en)
DE (1) DE29818190U1 (en)
WO (1) WO2000022719A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6628022B2 (en) * 2001-02-09 2003-09-30 Siemens Westinghouse Power Corporation Power generator system having diode support and rupture containment device and associated methods
JP4720024B2 (en) * 2001-06-05 2011-07-13 株式会社安川電機 Permanent magnet synchronous motor
DE102008054848A1 (en) 2008-12-18 2010-07-01 Robert Bosch Gmbh Machine with storage device
DE102008054850A1 (en) 2008-12-18 2010-07-01 Robert Bosch Gmbh Machine with storage device
RU2444110C2 (en) * 2009-10-12 2012-02-27 Михаил Федорович Ефимов Electromagnetic machine with two-stage excitation
US20140191606A1 (en) * 2013-01-10 2014-07-10 Hamilton Sundstrand Corporation Multi-channel wound-field synchronous machine
JP6413775B2 (en) * 2015-01-14 2018-10-31 株式会社デンソー Rotating electric machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1513850A1 (en) 1966-03-17 1970-01-08 Krupp Gmbh Automotive lighting system
JPS6322141B2 (en) 1980-10-23 1988-05-10 Hitachi Ltd
US4647806A (en) 1985-06-10 1987-03-03 Giovanni Giuffrida Brushless alternator
US4918343A (en) * 1988-10-13 1990-04-17 Kohler Co. Brushless alternator
JP3709582B2 (en) 1995-08-11 2005-10-26 株式会社デンソー Vehicle alternator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0022719A1 *

Also Published As

Publication number Publication date
DE29818190U1 (en) 2000-02-17
WO2000022719A1 (en) 2000-04-20
BR9906867A (en) 2000-10-17
US6362550B1 (en) 2002-03-26
JP2002528033A (en) 2002-08-27

Similar Documents

Publication Publication Date Title
US5696419A (en) High-efficiency electric power generator
US4712035A (en) Salient pole core and salient pole electronically commutated motor
JP3740375B2 (en) AC generator for vehicles
US5952757A (en) Line start permanent magnet motor
US4654551A (en) Permanent magnet excited alternator compressor with brushless DC control
US6541887B2 (en) Permanent-magnet motor-generator with voltage stabilizer
US5903084A (en) Rotor for dynamo-electric machine
EP1177611B1 (en) Polyphase electric rotary machine
US6236134B1 (en) Hybrid alternator
JP4148460B2 (en) Improved rotating electrical equipment for automobiles
KR100523641B1 (en) Vehicular generator-motor system
US5483116A (en) Rotor for a rotating electric machine
US7893594B2 (en) Alternating-current dynamo-electric machine
US6940197B2 (en) Rotary electric machine for vehicle and control device thereof
EP0675586B1 (en) Flux controlled permanent magnet dynamo-electric machine
JP3456158B2 (en) Starter generator for internal combustion engine
JP5289572B2 (en) Vehicle power supply system
JP3091768B2 (en) Voltage regulator with hybrid AC generator
US5656922A (en) Vehicle based AC power system
US2928963A (en) Dynamoelectric machine
CN1068989C (en) Alternator for vehicle
DE10056556B4 (en) Dynamo-electric machine
US4797602A (en) Dynamo electric machines
EP2073361B1 (en) Dynamoelectric machine
JP3466591B2 (en) Rotating electric machine

Legal Events

Date Code Title Description
AK Designated contracting states:

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20001020

RBV Designated contracting states (correction):

Designated state(s): DE FR GB IT

18D Deemed to be withdrawn

Effective date: 20070501