EP3824527A1 - Isolationssystem zur reduzierung der isolierungsschädigung der wicklungen eines elektromotors - Google Patents
Isolationssystem zur reduzierung der isolierungsschädigung der wicklungen eines elektromotorsInfo
- Publication number
- EP3824527A1 EP3824527A1 EP19802155.2A EP19802155A EP3824527A1 EP 3824527 A1 EP3824527 A1 EP 3824527A1 EP 19802155 A EP19802155 A EP 19802155A EP 3824527 A1 EP3824527 A1 EP 3824527A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- insulation
- windings
- electric motor
- relative permittivity
- 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
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Definitions
- Insulation system to reduce the insulation damage to the windings of an electric motor
- the invention relates to an insulation system for reducing the insulation damage to the windings of an electric motor.
- Insulation damage is all the more dangerous since it only occurs after the motor has been in operation, e.g. B. by resting abrasion of the brushes of a commutator motor, the short circuit between insulation bridges thereby bridged or the body connection with engine mass parts can lead to an engine failure.
- a measurement signal of an electrical test for. B. in the form of a voltage test of the insulation
- a measurement signal of a surface test for. B. in the form of a diameter test of the insulation.
- the first windings of a coil have often been surrounded with an insulating tube in order to locally improve the dielectric strength.
- the disadvantage here is that the conventional insulating hoses are made of a low-primitive material (fabric) and therefore only counteract penetration through an absolutely stronger insulation.
- the invention is therefore based on the object of overcoming the aforementioned disadvantages and proposing a solution with which insulation damage by high-frequency voltage pulses can be reduced and, accordingly, the service life and life of a winding can be extended.
- a basic idea of the invention is that by increasing the winding capacity, a homogenization of the voltage distribution is achieved overall by the electrical insulation of the winding tooth to the egg (bobbin) with a material of low permittivity and preferably at the same time an increase in the permittivity between the windings is carried out by pressing with a mass of high permittivity. As a result, the winding capacity g is increased.
- the voltage drop in the first windings can be reduced and specifically distributed over a large number of adjacent windings.
- Tightly wound coils behave towards high-frequency voltages and especially against sharp jump waves (voltage changes) essentially as if the individual turns were not conductively connected to each other, but only to each other and to the earth would be capacitively chained.
- the current profile is no longer based on the profile of the conductive tracks, but rather takes place essentially transversely to the windings as a so-called displacement current through the insulation of the conductors, which forms the winding and earth capacitance of the winding, as is shown schematically in the figure shown later 2 is shown.
- Coils behave to low and moderate frequency AC voltages just like homogeneous lines with a certain wave resistance, while they respond to extremely high frequencies above their critical frequency like capacitor chains with a certain capacitance. Furthermore, a capacitance C is formed between each winding at earth potential.
- Figure 1 shows an equivalent circuit diagram of such a capacitor chain with a number of capacitors, which are representative of the capacitance between two adjacent conductor loops of a winding and the earth potential. For a voltage curve with a low frequency, the current essentially runs as a line current in the windings. In the case of higher frequencies, there is an increasing displacement or capacitance current across the turns through the insulation.
- an insulation system for reducing the insulation damage to the insulation of the windings of an electric motor comprising at least one winding tooth (preferably a plurality of winding teeth) formed from an electrical sheet with a large number of winding wires, which wind around the respective winding tooth to form a coil.
- the material has been introduced between the winding wires or around the windings by pressing with a molding compound. It is further advantageous if the molding compound contains a component of which the relative permittivity number 8 is greater than 10 3 .
- a material selection is particularly advantageous in which the component is a mixed oxide of barium and titanium, preferably barium titanate, further preferably with a relative permittivity number 8 between 10 3 and 10 4.
- Another aspect of the present invention relates to an electric motor with a winding arrangement consisting of a laminated one Winding cores made of electrical sheets with winding teeth and an insulation system as described above.
- Another aspect of the present invention further relates to a winding arrangement consisting of a laminated winding body made of electrical sheets with winding teeth and an insulation system as explained above.
- the voltage waves predominantly stress the input turns of the coil to breakdown from turn to turn.
- periodic wave trains with sinusoidal voltage of subcritical frequency hit the coil which can result from natural vibrations of local oscillation circuits at any point in the line network, they run with their mountains and valleys undamped over the winches. fertilize away. They therefore stress the inner turns of the coil as much as the input turns.
- the winding voltage of these waves is only low, so that the insulation between the windings is not significantly stressed by them.
- FIG. 1 is a schematic view of an embodiment of the present invention.
- Fig. 2 shows the displacement current through the insulation of the conductors that the
- FIG. 1 a section, namely the winding tooth 10 of a winding arrangement of an electric motor is shown schematically.
- a plurality of winding wires W1,..., Wn are wound around the winding tooth 10, which is formed from a stack of electrical sheets, to form a coil 20.
- a specifically designed insulation system 1 which contributes to reducing the insulation damage to the insulation of the windings due to the targeted influencing of the winding capacity.
- an insulation 11 made of a material M1 is applied to the surface of the winding tooth 10, which has a low relative
- an insulating was between the winding wires W1, ..., Wn Material M2 introduced in comparison with the relative permittivity number Ci high relative permittivity number C 2 , namely by pressing with a molding compound which contains a mixed oxide of barium and titanium, preferably barium titanate as a component.
- the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the solution shown even in the case of fundamentally different types. It would also be conceivable to increase the dielectric strength of the winding by replacing a conventional filler. It would also be advantageous to create insulating sleeves from a highly permeable material or to use them as fillers. Then such insulating sleeves could also be used around the winding wires.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018128589.2A DE102018128589A1 (de) | 2018-11-14 | 2018-11-14 | Isolationssystem zur Reduzierung der Isolierungsschädigung der Wicklungen eines Elektromotors |
| PCT/EP2019/080841 WO2020099306A1 (de) | 2018-11-14 | 2019-11-11 | Isolationssystem zur reduzierung der isolierungsschädigung der wicklungen eines elektromotors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3824527A1 true EP3824527A1 (de) | 2021-05-26 |
Family
ID=68273990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19802155.2A Pending EP3824527A1 (de) | 2018-11-14 | 2019-11-11 | Isolationssystem zur reduzierung der isolierungsschädigung der wicklungen eines elektromotors |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3824527A1 (de) |
| CN (1) | CN209545289U (de) |
| DE (1) | DE102018128589A1 (de) |
| WO (1) | WO2020099306A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA797401A (en) * | 1968-10-22 | Westinghouse Electric Corporation | Electric transformer and windings therefor | |
| DE3833165A1 (de) | 1988-09-27 | 1990-03-29 | Siemens Ag | Verfahren zur erfassung von isolationsfehlern an kunststoffisolierten elektrischen leitern |
| JP3158026B2 (ja) * | 1995-11-24 | 2001-04-23 | 松下電器産業株式会社 | 回転機 |
| CA2344564C (en) * | 2000-09-14 | 2008-07-22 | General Electric Canada Inc. | Graded electric field insulation system for dynamoelectric machine |
| JP2005176482A (ja) * | 2003-12-10 | 2005-06-30 | Fanuc Ltd | 電動機 |
| JP5227104B2 (ja) * | 2008-07-25 | 2013-07-03 | トヨタ自動車株式会社 | 相間絶縁部材 |
| US20150028701A1 (en) * | 2010-07-02 | 2015-01-29 | Alstom Technology Ltd | Stator bar |
| JP2013143810A (ja) * | 2012-01-10 | 2013-07-22 | Toshiba Corp | 絶縁紙、およびそれを用いた回転電機 |
| JP6885180B2 (ja) * | 2016-11-08 | 2021-06-09 | 三菱電機株式会社 | モータおよびモータの製造方法 |
-
2018
- 2018-11-14 DE DE102018128589.2A patent/DE102018128589A1/de not_active Withdrawn
-
2019
- 2019-02-25 CN CN201920235775.5U patent/CN209545289U/zh active Active
- 2019-11-11 WO PCT/EP2019/080841 patent/WO2020099306A1/de not_active Ceased
- 2019-11-11 EP EP19802155.2A patent/EP3824527A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020099306A1 (de) | 2020-05-22 |
| CN209545289U (zh) | 2019-10-25 |
| DE102018128589A1 (de) | 2020-05-14 |
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Legal Events
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
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| 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 |
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