CN114614605A - Stator winding, generator, and detection device and detection method for stator winding - Google Patents

Stator winding, generator, and detection device and detection method for stator winding Download PDF

Info

Publication number
CN114614605A
CN114614605A CN202011449673.7A CN202011449673A CN114614605A CN 114614605 A CN114614605 A CN 114614605A CN 202011449673 A CN202011449673 A CN 202011449673A CN 114614605 A CN114614605 A CN 114614605A
Authority
CN
China
Prior art keywords
stator winding
aluminum
turn
flat wire
aluminum flat
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
Application number
CN202011449673.7A
Other languages
Chinese (zh)
Inventor
王洪波
李书杰
尹梦雪
魏嘉星
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.)
Beijing Sany Intelligent Motor Co ltd
Original Assignee
Beijing Sany Intelligent Motor Co ltd
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 Beijing Sany Intelligent Motor Co ltd filed Critical Beijing Sany Intelligent Motor Co ltd
Priority to CN202011449673.7A priority Critical patent/CN114614605A/en
Publication of CN114614605A publication Critical patent/CN114614605A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/02—Windings characterised by the conductor material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/30—Windings characterised by the insulating material
    • 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
    • H02K3/44—Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

The invention relates to the technical field of generators, in particular to a stator winding, a generator and a detection device and a detection method of the stator winding, wherein the stator winding comprises a plurality of turns of aluminum flat wires which are arranged in parallel, each turn of aluminum flat wire comprises an aluminum conductor and a first insulation layer coated on the outer side of the aluminum conductor, and the first insulation layer comprises a polyimide-fluorine 46 composite film sintered layer. Because aluminum components are easy to deform in the actual manufacturing process, the turn-to-turn insulation requirement of the winding is higher, and therefore the stator winding adopts polyimide-fluorine 46 composite film sintering for the turn-to-turn insulation between a plurality of turns of aluminum conductors, and the aluminum conductors can be provided with enough structural strength while the insulation requirement is ensured. The purpose is through changing aerogenerator stator winding material, the combination of metal material and non-metal material reduces effective material weight, when guaranteeing stator winding structural strength, improves generator power density.

Description

Stator winding, generator, and detection device and detection method for stator winding
Technical Field
The invention relates to the technical field of generators, in particular to a stator winding, a generator, and a detection device and a detection method of the stator winding.
Background
At present, in a doubly-fed generator, a stator winding of a motor is usually made of red copper, and the copper is heavy, so that the produced generator is heavy, and along with the increase of the power of a wind power doubly-fed wind generator, the power density of the generator is improved, and the weight of the doubly-fed wind generator is reduced.
Disclosure of Invention
The invention provides a stator winding, a generator, a detection device and a detection method of the stator winding, which are used for overcoming the defects of larger weight of the stator winding and lower power density of the generator in the prior art, and realizing the reduction of the weight of the winding, thereby reducing the weight of the generator and further realizing the effect of high power density of a wind driven generator by changing materials.
The invention provides a stator winding which comprises a plurality of turns of aluminum flat wires, wherein the plurality of turns of aluminum flat wires are arranged in parallel, each turn of aluminum flat wire comprises an aluminum conductor and a first insulating layer coated on the outer side of the aluminum conductor, and the first insulating layer comprises a polyimide-fluorine 46 composite film sintered layer.
According to the stator winding provided by the invention, the outer side of the multi-turn aluminum flat wire is coated with the second insulating layer, and the second insulating layer is formed by coating a glass fiber reinforced mica tape in a mode of overlapping 2 layers.
According to the stator winding, the outer side of the second insulating layer is coated with the paint coating.
According to the stator winding, the paint coating is formed by vacuum pressure impregnation.
According to the stator winding provided by the invention, the aluminum conductor is made of electrical aluminum.
The stator winding further comprises a platinum thermal resistor, and the platinum thermal resistor is embedded between the multi-turn aluminum flat wires.
The stator winding further comprises an outer lead, and the outer lead is led out of the aluminum flat wire.
The invention also provides a generator comprising a stator winding as described above.
The invention also provides a detection device of the stator winding, which comprises a temperature monitor and a resistance detector, wherein the resistance detector is connected with the outer lead of the stator winding, and the temperature monitor is connected with the platinum thermal resistor of the stator winding.
The invention also provides a method for detecting the stator winding by the detection device for the stator winding, which comprises the following steps:
measuring the direct current resistance change of the stator winding by the resistance detector under the condition that the stator winding is stopped;
monitoring temperature changes of the stator windings through the temperature monitor.
According to the stator winding provided by the invention, the aluminum conductor is adopted to replace the copper conductor, and the hardness of the aluminum conductor is lower than that of the copper conductor, so that the weight of the winding can be reduced, the weight of a generator is reduced, and the high power density of the wind driven generator is realized by changing materials. Because the aluminum element is easy to deform in the actual manufacturing process, the turn-to-turn insulation requirement of the winding is higher, the stator winding adopts polyimide-fluorine 46 composite film sintering for the turn-to-turn insulation between a plurality of turns of aluminum conductors, namely the first insulation layer is a polyimide-fluorine 46 composite film sintering layer, the aluminum conductor is coated to form a soft aluminum flat wire, the polyimide-fluorine 46 composite film sintering layer can provide sufficient structural strength for the aluminum conductor while the insulation requirement is ensured, and the structure of the polyimide-fluorine 46 composite film sintering layer can be correspondingly changed according to different voltages and different frequencies. The purpose is to reduce the weight of effective materials by changing the material of the stator winding of the wind driven generator and combining metal materials and non-metal materials, and improve the power density of the generator while ensuring the structural strength of the stator winding.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a stator winding provided by the present invention;
FIG. 2 is a schematic structural diagram of a resistance detector of the stator winding detection device provided by the present invention;
reference numerals are as follows:
1: a flat aluminum wire; 2: an aluminum conductor; 3: a first insulating layer; 4: a second insulating layer; 5: coating with paint; 6: a platinum thermal resistance; 7: a resistance detector; 8: an outer lead; 9: and (7) leading wires.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, a stator winding according to an embodiment of the present invention includes a plurality of turns of aluminum flat wire 1, where the plurality of turns of aluminum flat wire 1 are arranged in parallel, each turn of aluminum flat wire 1 includes an aluminum conductor 2 and a first insulating layer 3 coated outside the aluminum conductor 2, and the first insulating layer 3 includes a polyimide-fluorine 46 composite film sintered layer.
According to the stator winding disclosed by the embodiment of the invention, the aluminum conductor is adopted to replace the copper conductor, and the hardness of the aluminum conductor 2 is lower than that of the copper conductor, so that the weight of the winding can be reduced, the weight of a generator is reduced, and the high power density of the wind driven generator is realized by changing materials. Because aluminum components are easy to deform in the actual manufacturing process, the turn-to-turn insulation requirement of the windings is higher, the stator windings adopt polyimide-fluorine 46 composite film sintering for the turn-to-turn insulation between multiple turns of aluminum conductors 2, namely the first insulation layer 3 is a polyimide-fluorine 46 composite film sintering layer, the aluminum conductors 2 are coated to form the soft aluminum flat wire 1, the polyimide-fluorine 46 composite film sintering layer can guarantee the insulation requirement, meanwhile, enough structural strength is provided for the aluminum conductors 2, and the structure of the polyimide-fluorine 46 composite film sintering layer can be correspondingly changed according to different voltages and different frequencies. The purpose is to reduce the weight of effective materials by changing the material of the stator winding of the wind driven generator and combining metal materials and non-metal materials, and improve the power density of the generator while ensuring the structural strength of the stator winding.
According to one embodiment provided by the invention, the outer side of the multi-turn flat aluminum wire 1 is coated with a second insulating layer 4, and the second insulating layer 4 is formed by coating glass fiber reinforced mica tapes in a mode of overlapping 2 layers. In the embodiment, the ground insulation of the stator winding is the second insulation layer 4 which is coated on the outer side of the whole body after the multi-turn aluminum flat wires 1 are arranged in parallel, the second insulation layer 4 adopts the glass fiber reinforced mica tape to be wrapped by 2 layers in a stacked mode, the waterproof performance and the electric heat aging resistance of the structure are better, and therefore the defect that the outer surface of the aluminum conductor 2 is easy to oxidize is overcome, the coating of the second insulation layer 4 and the aluminum conductor 2 is tighter and tighter, and the product quality of the stator winding is further improved. While the structure can be optimized for different voltage classes.
According to one embodiment of the invention, the second insulating layer 4 is coated on its outside with a lacquer coating 5. Wherein the lacquer coating 5 is formed by vacuum pressure impregnation. In this embodiment, after the ground insulation of the stator winding adopts the glass fiber reinforced mica tape to wrap 2 layers, the outer surface of the second insulating layer 4 is subjected to paint dipping, so as to form the paint coating 5 of the whole outside of the stator winding. In other embodiments, the painting may be used.
According to one embodiment of the present invention, the aluminum conductor 2 is made of electrical aluminum. In this embodiment, the stator winding of the doubly-fed wind generator adopts the aluminum conductor 2, the aluminum material of the aluminum conductor 2 is only the electrical aluminum, the electrical conductivity of the electrical aluminum is 60% of the electrical conductivity of the electrical copper, and the density of the electrical aluminum is 30% of the electrical copper. Therefore, the stator winding made of aluminum for conductors with the same electric conductivity is much lighter than the electronic winding made of copper, thereby reducing the effective material weight, reducing the weight of the winding, further reducing the weight of the generator and realizing high power density of the wind driven generator.
According to one embodiment provided by the invention, the electronic winding of the embodiment of the invention further comprises a platinum thermal resistor 6, and the platinum thermal resistor 6 is embedded between the multi-turn aluminum flat wires 1. In this embodiment, PT100 platinum resistance 6 is pre-buried between aluminium flat wire 1, and in stator winding operation process, but satisfies the operating mode temperature rise monitoring requirement to stator winding through the temperature condition of platinum resistance 6 real-time detection stator winding. In other embodiments, other adaptive temperature sensing elements may also be employed.
According to one embodiment provided by the invention, the electronic winding of the embodiment of the invention further comprises an outer lead 8, and the outer lead 8 is led out from the aluminum flat wire 1. In this embodiment, the outer lead 8 is led out from the flat aluminum wire 1, the outer lead 8 can be connected with a lead 9 of an external device, and the external device can be a detection device for detecting the performance of the stator winding to perform the first-off detection.
Embodiments of the present invention also provide a generator including a stator winding as in the above embodiments.
According to the generator provided by the embodiment of the invention, the weight of the winding can be reduced by changing the material of the stator winding, so that the weight of the generator is reduced, and the high power density of the wind driven generator is realized while the structural strength of the stator winding is ensured.
As shown in fig. 2, the embodiment of the present invention further provides a stator winding detection apparatus of the above embodiment, which includes a temperature monitor and a resistance detector 7, the resistance detector 7 is connected to an external lead 8 of the stator winding, and the temperature monitor is connected to a platinum thermistor 6 of the stator winding.
According to the detection device for the stator winding, the resistance detector 7 is used for measuring the direct-current resistance change of the stator winding, and the resistance detector 7 is directly connected to the outer lead 8 of the stator winding through the lead 9 and used for monitoring when the stator winding is stopped. The temperature monitor is used for monitoring the temperature rise of the stator winding in real time and is connected with a platinum thermal resistor 6 arranged between the aluminum flat wires 1 of the stator winding. Because the aluminum material is easy to oxidize in actual operation and low in temperature-resistant level, the effectiveness of the stator winding of the aluminum conductor 2 is detected by periodically aligning the aluminum material in the use process, a detection device of the doubly-fed wind generator is developed in a matched manner, the doubly-fed wind generator is ensured to reliably operate for a long time while the aluminum material is used, and the operation condition of the stator winding is detected and judged.
In this embodiment, the resistance detector 7 may be a circuit detection element such as a dc bridge.
The embodiment of the present invention further provides a method for detecting a stator winding by the apparatus for detecting a stator winding of the above embodiment, including:
under the condition that the stator winding is stopped, measuring the direct current resistance change of the stator winding through a resistance detector 7;
the temperature change of the stator winding is monitored by a temperature monitor.
According to the detection method of the stator winding, the resistance detector 7 measures the direct-current resistance change of the stator winding, and the resistance detector 7 is directly connected to an external factor line of the stator winding through a lead 9 and monitors when the stator winding is stopped. The temperature monitor monitors the temperature rise of the stator winding in real time and is connected with a platinum thermal resistor 6 arranged between the aluminum flat wires 1 of the stator winding. The aluminum material is easy to oxidize in actual operation and low in temperature resistance level, and the effectiveness of the stator winding of the aluminum conductor 2 is detected by periodically aligning the aluminum material in the using process of the stator winding, so that the detection method is developed in a matched manner, the double-fed wind driven generator is ensured to reliably operate for a long time while the aluminum material is used, and the operation condition of the stator winding is detected and judged.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A stator winding, characterized by: the aluminum flat wire comprises a plurality of turns of aluminum flat wires, the aluminum flat wires are arranged in parallel, each turn of aluminum flat wire comprises an aluminum conductor and a first insulating layer coated on the outer side of the aluminum conductor, and the first insulating layer comprises a polyimide-fluorine 46 composite film sintered layer.
2. A stator winding according to claim 1, wherein: and the outer side of the multi-turn aluminum flat wire is coated with a second insulating layer, and the second insulating layer is formed by coating a glass fiber reinforced mica tape in a mode of overlapping 2 layers.
3. A stator winding according to claim 2, wherein: and the outer side of the second insulating layer is coated with a paint coating.
4. A stator winding according to claim 3, wherein: the lacquer coating is formed by vacuum pressure impregnation.
5. A stator winding according to any one of claims 1 to 4, wherein: the aluminum conductor is made of electrician aluminum.
6. The stator winding of claim 5, wherein: the aluminum flat wire is characterized by further comprising a platinum thermal resistor, wherein the platinum thermal resistor is embedded among the multiple turns of the aluminum flat wire.
7. The stator winding of claim 6, wherein: the aluminum flat wire is characterized by further comprising an outer lead, and the outer lead is led out of the aluminum flat wire.
8. An electrical generator, characterized by: comprising a stator winding according to any of claims 1 to 7.
9. A stator winding testing apparatus according to any one of claims 1 to 8, wherein: the temperature monitoring device comprises a temperature monitor and a resistance detector, wherein the resistance detector is connected with an outer lead of a stator winding, and the temperature monitor is connected with a platinum thermal resistor of the stator winding.
10. A stator winding detection method using the stator winding detection device according to claim 9, characterized in that: the method comprises the following steps:
measuring the direct current resistance change of the stator winding by the resistance detector under the condition that the stator winding is stopped;
monitoring temperature changes of the stator windings through the temperature monitor.
CN202011449673.7A 2020-12-09 2020-12-09 Stator winding, generator, and detection device and detection method for stator winding Pending CN114614605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011449673.7A CN114614605A (en) 2020-12-09 2020-12-09 Stator winding, generator, and detection device and detection method for stator winding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011449673.7A CN114614605A (en) 2020-12-09 2020-12-09 Stator winding, generator, and detection device and detection method for stator winding

Publications (1)

Publication Number Publication Date
CN114614605A true CN114614605A (en) 2022-06-10

Family

ID=81857172

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011449673.7A Pending CN114614605A (en) 2020-12-09 2020-12-09 Stator winding, generator, and detection device and detection method for stator winding

Country Status (1)

Country Link
CN (1) CN114614605A (en)

Similar Documents

Publication Publication Date Title
US7572980B2 (en) Copper conductor with anodized aluminum dielectric layer
TW201618120A (en) High temperature insulated aluminum conductor
US8482902B2 (en) Solid electrolytic capacitor element and manufacturing method therefor
JP5558961B2 (en) Hermetic compressor
US9508461B2 (en) Polymeric overcoated anodized wire
KR101430567B1 (en) Voltage grading structure in a high­voltage stator coil of an electromotive machine
US6261437B1 (en) Anode, process for anodizing, anodized wire and electric device comprising such anodized wire
CN102484406B (en) Tape structure with conductive outer side and electrically insulating inner side
WO2006073016A1 (en) Superconductive cable withstand voltage test method
CN109559861A (en) A kind of dry type high-voltage capacitor core
US20060268471A1 (en) Resistive superconducting fault current limiter
JP2012113836A (en) Insulation coating conductor wire and rotary electric machine
CN214626556U (en) Stator winding, generator and detection device of stator winding
CA2861321C (en) High voltage stator coil with reduced power tip-up
CN114614605A (en) Stator winding, generator, and detection device and detection method for stator winding
US6624547B1 (en) Power system having stator coils for grading voltage between inner vent tubes and coil strands and associated methods
US20170194826A1 (en) Wound conductor arrangement and method for insulating a wound conductor
US20070136033A1 (en) Method for designing insulation thickness of 22.9kV class High-temperature superconducting cable using conversion coefficient
US10763005B2 (en) Insulation for conductors
KR102200163B1 (en) Insulation of non-immersion transformers
RU63593U1 (en) ONBOARD WIRE WITH COMBINED INSULATION
CN216014925U (en) Power cable structure with aluminum-based wire of nanometer film
CN213817384U (en) Corona-proof structure of high-voltage generator bar type winding VPI (voltage potential insulation) bar
CN219031400U (en) Transformer load testing device
CN201378457Y (en) Copper-silver-layered corona resistant transposed conductor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination