EP3596803A1 - Elektronisch kommutierte elektrische maschine - Google Patents
Elektronisch kommutierte elektrische maschineInfo
- Publication number
- EP3596803A1 EP3596803A1 EP18711279.2A EP18711279A EP3596803A1 EP 3596803 A1 EP3596803 A1 EP 3596803A1 EP 18711279 A EP18711279 A EP 18711279A EP 3596803 A1 EP3596803 A1 EP 3596803A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- tooth
- main
- teeth
- stator teeth
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- 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
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/06—Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/12—Machines characterised by the modularity of some components
Definitions
- the invention relates to electronically commutated electrical machines, in particular electrical machines with measures for increased fault tolerance.
- Electronically commutated electrical machines in particular permanent magnet-excited electrical machines, can be designed for increased robustness against electrical faults with a plurality of separate winding units.
- the Wcklungsticianen each comprise separate phase strands, each with one or more phase coils.
- the separate weighers are each driven by separate power modules to provide high electrical isolation, thereby providing a high degree of robustness against faults. This is especially true for electrical machines in which the phase strands of the individual Wcklungsüen not distributed, but are arranged in segments on a stator of the electric machine.
- the separate polyphase dicing units are electrically isolated, but not magnetically and thermally isolated from one another, whereby the fault tolerance of the electric machine is limited to short circuit faults within one of the dewatering units.
- an uncontrollable short-circuit current in one of the faulty reject units may generate a magnetic flux that is in one of the adjacent faultless ones Winding units coupled and the control or regulation of the phase currents in the error-free winding unit difficult. This can potentially endanger the operation of the electrical machine.
- a short-circuit current can cause high ohmic losses in the faulty winding unit, whereby the thermal integrity of the adjacent fault-free Wcklungsäen can be affected due to lack of thermal insulation between the winding units.
- a three-phase electric machine which have four Wcklungsäen, each associated with a quarter segment of the stator assembly.
- the electric machine has twelve slots and eight rotor poles, so that the respective weigher units are each formed with three stator teeth, so that each of the stator coils is assigned to a phase.
- the four individual units are powered by four separate three-phase power modules in the form of three-phase converters to provide the electrical insulation between the winding units necessary for fault tolerance.
- the four winding units are not magnetically and thermally isolated from each other, and phase strands of adjacent winding units lie in a common stator slot so that a short circuit between the phase strings of two weeder units can result in the failure of two of the weighers.
- a stator assembly for an electric machine comprising:
- a cylindrical stator yoke having main stator teeth and spacer stator teeth projecting therefrom, wherein a plurality of stator teeth groups of a plurality of mutually adjacent main stator teeth are separated from each other by a spacer stator tooth;
- winding units each having a number of phase strands, each having one or more phase coils, wherein the winding units are each associated with one of the stator tooth groups of the stator assembly and arranged thereon.
- stator arrangement is to arrange several separate Wecklungs- units each having a number of phase strands, each having one or more phase coils, in each case in segments of stator tooth groups of the stator assembly, so that the separate Wcklungsticianen adjacent to each other are provided on the stator.
- the Wecklungsticianen do not overlap, so that phase coils of different Wcklungsüen are not arranged in a common Statornut. Therefore, in the event of an electrical short in one of the weeding units, the electrical integrity of the other winding units is not impaired.
- a spacer stator tooth is provided, which has a geometry deviating from the stator teeth of the stator tooth groups. In this way, an improved thermal and magnetic decoupling can be achieved.
- the width of the tooth shanks of the spacer stator teeth may be equal to or greater than the width of the main stator teeth.
- the Abstandstatorzähne and the Hauptstatorzähne may each have tooth tips, which are widened with respect to the toothed shaft in the circumferential direction. It can be provided that in an electrical machine having a pole pair number O and a number N of separate winding units, a distance stator tooth angle CIST, ie the angular range covered by one of the spacer stator teeth, is 360 ° (1 / N-1/0) ,
- a main stator tooth angle CIMT i. the range of angles covered by one of the main stator teeth is 360 ° / (O P).
- a distance stator tooth angle CIST i. the angular range covered by one of the spacer stator teeth corresponds to 1/2 ap, where ap corresponds to a pole angle of a rotor pole.
- a main stator tooth angle CIMT i. the angular range covered by one of the main stator teeth corresponds to 2/3 ap, where ap corresponds to a pole angle of a rotor pole.
- an electric machine with the above stator arrangement and a rotor with rotor poles is provided.
- the pole pair number of the rotor can correspond to five.
- a motor system with the above electrical machine and with power modules is provided which are each designed to drive one or more of the winding units.
- the power modules can be designed or controllable in order to drive the winding units with a phase offset of the phase currents.
- FIG. 1 is a cross-sectional view through an electronically commutated electrical machine
- FIG. 2 shows a section through the electric machine of FIG. 1 for illustrating the dimensioning of the stator teeth of the stator arrangement of the electric machine;
- Figure 3 is a schematic representation of a control of the electric machine with separate power modules
- FIG. 4 shows a diagram for illustrating the profiles of the phase currents of one of the winding units.
- Figure 5 is a representation of the torque curve over the angle of rotation.
- FIG. 1 shows a schematic cross-sectional representation through an exemplary permanent magnet-excited electric machine 1.
- the electric machine has a stator arrangement 2 and a rotor 3.
- the stator assembly 2 is formed substantially cylindrical and has a likewise cylindrical inner recess 4, in which the rotor 3 is arranged rotatably.
- the stator assembly 2 has a cylindrical stator yoke 21 from which evenly spaced stator teeth 22 project inwardly.
- 16 stator teeth 22 are provided.
- the stator teeth 22 include main stator teeth 22a and spacer stator teeth 22b.
- Each of the stator teeth 22a, 22b is provided with a toothed shaft 23 projecting from the stator yoke 21, at the inwardly projecting end thereof a tooth tip 24 is arranged.
- the tooth heads 24 represent over the width of the tooth shanks 23 protruding tooth head portions which widen the stator tooth 22 at its end, and form the cylindrical contour of the inner recess. 4
- the rotor 3 is provided with a rotor body 31 and with the rotor poles 32 forming permanent magnets 33.
- the permanent magnets 33 are provided as surface-mounted magnets which have a contouring, for example a judge contour or the like, on their surfaces facing the stator teeth.
- the rotor 3 may also be formed with buried permanent magnets.
- the electric machine 1 has sixteen stator teeth 22 and ten rotor poles 32.
- the sixteen stator teeth 22 include four stator teeth groups of adjacent main stator teeth 22a, each separated by one of the spacer stator teeth 22b.
- the main stator teeth 22a of a stator tooth group G are each wound with a stator coil 26, which are assigned to a phase or a phase strand.
- the stator coils 26 of one of the stator tooth groups G form a winding unit 28.
- the stator coils 26 of a stator tooth group G are each assigned to different phases, so that stator coils 26 for three phases are arranged on the stator teeth 22a of a stator tooth group G in the exemplary embodiments shown.
- the distance stator tooth 22b between two adjacent stator tooth groups G allows the immediately adjacent stator coils 26 of two adjacent stator tooth groups G not to be in the same stator slot 25, so that short circuits between the stator coils of different winding units can not occur.
- FIG. 2 shows, in a detailed view of the electric machine 1, the dimensioning of the spacing stator tooth 22b, the main stator teeth 22a and the rotor poles 32 illustrates.
- the main stator tooth width WMT ie the width of the main stator teeth 22a in the circumferential direction, is equal to or smaller than the distance stator tooth width WST, ie the width of the spacer stator teeth 22b in the circumferential direction (this is not drawn to scale in FIGS. 1-3):
- stator teeth 22 are not uniformly spaced from each other with their center axis and form stator slots 25 therebetween.
- main pitches OH between the center axes of the main stator teeth 22a are larger than the pitch pitches CIA between the center axis of a main stator tooth and the center axis of an adjacent spacer stator tooth 22b.
- the main tooth distances OH angular distance
- ⁇ ⁇ 360 (N (P + 1)) + ⁇
- a A 360 (N (P + 1)) - ⁇ ( ⁇ -1) / 2 corresponds to a number N of separate winding units and P corresponds to the phase number of each of the winding units.
- ⁇ corresponds to a selectable difference distance which can be selected in the range up to 10% of 360 N.
- the main electric stator angle CIMT i. the Wnkelbe- area is covered by one of the main stator teeth 22a, measured between the centers of the slot openings of the respective main stator tooth 22a defining stator slots 25, 120 ° electrical position angle
- the electrical attitude angle is defined as 360 ° by the number of pole pairs of the rotor 3.
- CIMT 2/3 cip
- cip corresponds to the rotor pole angle, ie the angle range which covers a rotor pole.
- the distance stator tooth angle CIST ie the angle range which is covered by one of the spacer stator teeth 22b, measured from the centers of the slot openings of the adjacent stator slots 25, should correspond to 90 ° electrical contact position, which corresponds to one half of a rotor pole angle cip:
- QMT 360 ° / (O P), where P corresponds to the number of phases of the electric machine.
- FIG. 3 shows a schematic representation of a control of the electric machine of Figure 1 is shown. It can be seen that the three phases of each of the winding units 28 are driven by a separate power module 5. In this case, the phase strands of each of the winding units 28 can be connected either in a star or a polygon circuit.
- the winding units which are diametrically opposed to each other, are driven by three-phase drive currents, as shown, for example, in the diagram of FIG. 4, which are offset from one another by 90 ° from the drive currents of a drive for the other two weeding units 28, which are likewise opposite one another ,
- FIG. 5 shows the normalized torque curve over a range of electrical position angles for the cases in which only the winding units W1 and W3 and only the reject units W2 and W4 are driven, and in the case where all four winding units are offset from each other by 90.degree Phase flow can be controlled. As a result, the torque ripple of the electric machine can be significantly reduced, for the present embodiment from 13.5% to 1, 9% of the average torque.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017204382.2A DE102017204382A1 (de) | 2017-03-16 | 2017-03-16 | Elektronisch kommutierte elektrische Maschine |
PCT/EP2018/055993 WO2018166930A1 (de) | 2017-03-16 | 2018-03-12 | Elektronisch kommutierte elektrische maschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3596803A1 true EP3596803A1 (de) | 2020-01-22 |
Family
ID=61655752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18711279.2A Pending EP3596803A1 (de) | 2017-03-16 | 2018-03-12 | Elektronisch kommutierte elektrische maschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3596803A1 (de) |
CN (1) | CN110383634B (de) |
DE (1) | DE102017204382A1 (de) |
WO (1) | WO2018166930A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3859954A1 (de) * | 2020-01-30 | 2021-08-04 | Maxon International AG | Funktionssicherer bürstenloser dc-elektromotor |
CN111404289B (zh) * | 2020-03-25 | 2021-01-12 | 中国科学院电工研究所 | 一种磁热隔离型定子结构及电机 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006021354A1 (de) * | 2006-05-08 | 2007-11-15 | Siemens Ag | Elektrische Maschine, insbesondere Synchronmotor, mit redundanten Statorwicklungen |
CN102231576B (zh) * | 2011-06-24 | 2013-08-21 | 大连名阳实业有限公司 | 自容错磁通切换永磁电机 |
DE102011084714A1 (de) * | 2011-10-18 | 2013-04-18 | Robert Bosch Gmbh | Elektrische Maschine |
CN102593978A (zh) * | 2012-02-27 | 2012-07-18 | 山东大学 | 伺服压力机用双绕组永磁无刷伺服电机 |
DE102014222064B4 (de) * | 2014-10-29 | 2018-09-13 | Robert Bosch Gmbh | Elektrische Maschine |
DE102015207368A1 (de) * | 2015-04-22 | 2016-10-27 | Robert Bosch Gmbh | Stator für eine elektrische Maschine sowie elektrische Maschine |
CN106257802A (zh) * | 2015-10-30 | 2016-12-28 | 北京精密机电控制设备研究所 | 一种容错电机拓扑结构 |
-
2017
- 2017-03-16 DE DE102017204382.2A patent/DE102017204382A1/de not_active Withdrawn
-
2018
- 2018-03-12 WO PCT/EP2018/055993 patent/WO2018166930A1/de unknown
- 2018-03-12 EP EP18711279.2A patent/EP3596803A1/de active Pending
- 2018-03-12 CN CN201880018186.XA patent/CN110383634B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN110383634B (zh) | 2022-04-01 |
DE102017204382A1 (de) | 2018-09-20 |
CN110383634A (zh) | 2019-10-25 |
WO2018166930A1 (de) | 2018-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2160816B1 (de) | Synchronmotor mit 12 statorzähnen und 10 rotorpolen | |
EP1811634B1 (de) | Verbindungsanordnung für die Statorwicklung einer Turbomaschine mit 2 oder mehr parallelen Kreisen | |
DE102015207368A1 (de) | Stator für eine elektrische Maschine sowie elektrische Maschine | |
WO2004098030A1 (de) | Geschaltete reluktanzmaschine, insbesondere sr-motor | |
DE112013001755T5 (de) | Rotierende elektrische Maschine | |
EP2427951B1 (de) | Elektrische synchronmaschine | |
DE102007054719A1 (de) | Elektrische Drehfeldmaschine | |
DE102016204688A1 (de) | Elektronisch kommutierte elektrische Maschine | |
DE102007034929A1 (de) | Transversalflussmaschine | |
DE102014222064B4 (de) | Elektrische Maschine | |
EP3724969B1 (de) | Kombination einer elektrischen drehstrommaschine mit einer umrichtereinheit und windkraftanlage | |
EP3596803A1 (de) | Elektronisch kommutierte elektrische maschine | |
WO2019215097A1 (de) | Verfahren zum herstellen einer wicklung für einen ständer einer elektrischen machine und elektrische maschine | |
DE102011084716A1 (de) | Elektrische Maschine | |
DE102010001620A1 (de) | Ständer einer permanenterregten rotierenden elektrischen Maschine | |
EP2228889B1 (de) | Elektrische Maschine und Verfahren zur Herstellung einer elektrischen Maschine | |
DE112021003433T5 (de) | Stator und motor | |
WO2015139940A2 (de) | Fehlertoleranter antrieb für elektrolenkungen | |
WO2002009257A1 (de) | Elektronisch kommutierte elektrische maschine, insbesondere motor | |
DE102011084714A1 (de) | Elektrische Maschine | |
WO2009083327A1 (de) | Elektrische maschine mit einem eine ständerwicklung aufweisenden ständer und zugehöriges herstellungsverfahren | |
DE102016221416A1 (de) | Elektrische Maschine | |
DE102015226106A1 (de) | Elektrische Maschine sowie Motorsystem mit einer elektrischen Maschine | |
DE102015226099A1 (de) | Elektrische Maschine für einen Lenkantrieb sowie ein Lenkantriebssystem | |
DE102020201547A1 (de) | Stator einer elektrischen Maschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
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 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20191016 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20210316 |