CN112564339B - Loss-reducing ventilation device for end part of high-capacity synchronous phase modifier - Google Patents
Loss-reducing ventilation device for end part of high-capacity synchronous phase modifier Download PDFInfo
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- CN112564339B CN112564339B CN202011369810.6A CN202011369810A CN112564339B CN 112564339 B CN112564339 B CN 112564339B CN 202011369810 A CN202011369810 A CN 202011369810A CN 112564339 B CN112564339 B CN 112564339B
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- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
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- 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
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a loss-reducing ventilation device for an end part of a high-capacity synchronous phase modulator, which comprises a pressing ring, a shielding layer outside the pressing ring, a double-layer shielding layer connected with the shielding layer, an insulating wind shield outside the shielding layer, a ventilation pressing finger, a magnetic shield and a positioning rib. Through setting up double-deck shielding layer, double-deck shielding layer and shielding layer, set up insulating pad between clamping ring and the insulating deep bead, ventilation pressure indicates inside ventilation chamber and a plurality of axial wind channel of being provided with, the magnetic screen sets up a plurality of ventilation holes, and indicate the coincidence of axial wind channel central line with ventilation pressure, the effectual distribution that improves the synchronous phase modulation machine tip electromagnetic field of large capacity, the tip clamping ring has been reduced, tip location muscle and tip ventilation pressure indicate the eddy current loss in, the wind direction that has changed the tip flows, the highest temperature in the tip structure has been reduced, the cooling effect of synchronous phase modulation machine tip structure has been strengthened, guarantee the security performance of synchronous phase modulation machine, moreover, the steam generator is simple in structure, and convenient for realization.
Description
Technical Field
The invention relates to the technical field of synchronous motors, in particular to a loss-reducing ventilation device for an end part of a high-capacity synchronous phase modifier.
Background
Due to the characteristics of energy and power load distribution in China, the ultra-high voltage direct current transmission system is rapidly developed and widely applied. The outstanding problems of weak direct current sending end, insufficient short circuit capacity and the like always threaten the safe and stable operation of the extra-high voltage direct current transmission system. In order to solve the reactive power regulation problem caused by extra-high voltage direct current transmission and the access of new energy into a power grid, the large-capacity synchronous phase modulator is used as indispensable reactive power compensation equipment in the current power grid by means of strong instantaneous reactive power support and short-time overload capacity. Nowadays, 300Mvar class large-capacity synchronous phase modulators are configured in part-area extra-high voltage direct current transmission systems.
When the novel synchronous phase modulator is put into a power grid to solve the reactive compensation problem of power grid faults, the synchronous phase modulator usually runs alternately under various working conditions, and particularly under the working conditions of over-excitation, under-excitation and short circuit, the sharply increased stator current generates a very large leakage magnetic field at the end part of the phase modulator. The end leakage magnetic field always passes through the path with the minimum magnetic resistance, and large eddy currents are induced in the bottom of the stator pressure finger, the inner circle and the outer circle of the pressing ring, so that the end structural part is locally overheated, and the safe operation of the synchronous phase modulator is endangered in serious cases.
Along with the continuous increase of synchronous phase modifier unit capacity, the increase of synchronous phase modifier tip structure size leads to the obvious increase of eddy current loss of tip structure response, the phase modifier tip adopts ordinary copper shielding can shield the regional magnetic leakage field of tip part, reduces the magnetic density of tip structure, but phase modifier tip structure local temperature is still higher, especially in the area temperature such as press finger bottom, the interior circle and the excircle of clamping ring, location muscle tip very high, long-term operation produces great influence to the camera body, and then causes the motor fault, causes the further expansion of electric wire netting fault. The design and optimization of large capacity synchronous phase modulators structures has become very important and urgent.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-capacity synchronous phase modifier end part loss reduction ventilation device, which solves the problem of local overheating caused by overlarge eddy current loss of a metal structural part at the stator end part of a synchronous phase modifier in the prior art.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the end loss reduction ventilation device comprises a pressing ring and a copper shield, wherein the pressing ring is fixedly connected with an end iron core of the synchronous phase modulator through a positioning rib, a double-layer shielding layer in a hollow structure is arranged on the front surface of the pressing ring, the double-layer shielding layer is fixedly connected with the pressing ring, one end of the copper shield is arranged in the double-layer shielding layer, and the copper shield and the double-layer shielding layer are insulated; the outer side of the double-layer shielding layer is fixedly connected with an insulating wind shield, and the inner surface of the insulating wind shield is relatively parallel to the outer surfaces of the copper shielding layer and the shielding layer; gaps for ventilation are arranged among the double-layer shielding layer, the pressing ring and the insulating wind shield; the copper shield is positioned in the gap;
the back of the pressing ring is fixedly provided with a ventilation pressing finger, the middle part of the ventilation pressing finger is provided with a middle ventilation cavity, the bottom of the ventilation pressing finger is provided with a bottom ventilation cavity communicated with the middle ventilation cavity, and the end surface of the ventilation pressing finger is provided with a plurality of axial ventilation channels communicated with the middle ventilation cavity;
the end face of the ventilation pressure finger is provided with a magnetic shield, and the magnetic shield is provided with a plurality of ventilation holes aligned with the axial ventilation channel;
a ventilation channel is arranged between the magnetic shield and the end iron core of the synchronous phase modulator, and a plurality of ventilation holes are communicated with the ventilation channel. The copper shield and the double-layer shield layer can guide the wind direction of the end part of the synchronous phase modulator and shield the magnetic field of the end part of the synchronous phase modulator, reduce the eddy current loss in structural members such as a pressing ring, a pressing finger, a positioning rib and the like at the end part of the synchronous phase modulator, reduce the temperature rise of the structural member at the end part and solve the problem of local overheating caused by overlarge eddy current loss of the metallic structural member at the end part of the stator of the synchronous phase modulator; the copper shield, the double-layer shielding layer, the insulating wind shield and the pressing ring form a multi-directional ventilation gap, the inner surface of the insulating wind shield is relatively parallel to the outer surfaces of the copper shield and the shielding layer, so that the heat dissipation of the copper shield and the shielding layer is accelerated, the temperature difference in the end structure of the synchronous phase modulator is reduced, and the safe operation performance of the synchronous phase modulator during operation is improved.
Further, the material of the shielding layer is copper.
Furthermore, the double-layer shielding layer is of a round cover structure with a through hole in the middle, each layer of the double-layer shielding layer comprises a plurality of fan-shaped shielding layers, a gap is formed between every two adjacent fan-shaped shielding layers, and the thickness of each layer of the double-layer shielding layer is 4-6 mm; a plurality of rectangular grooves are formed in the inner diameter of the double-layer shielding layer and are uniformly distributed along the circumferential direction, the width of each rectangular groove is 2-4 mm, and the depth of each rectangular groove is 10-15 mm; double-deck shielding layer adopts bilayer structure, and thickness is less, and every shielding layer carries out fan-shaped split and the internal diameter opens the rectangular channel, the eddy current loss that produces in the reduction double-deck shielding layer that can be better.
Further, the diameter in middle part ventilation chamber is 6 ~ 10mm, and the shape in bottom ventilation chamber is the rectangle, and the length and the width in bottom ventilation chamber all are greater than middle part ventilation chamber diameter, and the degree of depth in bottom ventilation chamber is 140 ~ 180 mm.
Preferably, the bottom ventilation cavity is in a circular truncated cone structure, the small end of the bottom ventilation cavity is connected with the middle ventilation cavity, the depth of the bottom ventilation cavity is 140-180 mm, and the central line of the bottom ventilation cavity coincides with the central line of the middle ventilation cavity. The ventilation pressure indicates that inside bottom ventilation chamber is the rectangle or is round platform shape for bottom ventilation chamber area of contact increases, makes the velocity of flow that cooling fluid got into the middle part ventilation chamber from bottom ventilation chamber increase, promotes the cooling effect that the ventilation pressure indicates, has guaranteed the rigidity that the ventilation pressure indicates simultaneously.
Furthermore, the bottom ventilation cavity is in a rectangular groove structure, the depth of the bottom ventilation cavity is 140-180 mm, and the width of the bottom ventilation cavity is 2-4 mm; set up bottom ventilation chamber into rectangle groove structure, the circulation route of extension response vortex that can be better to reduce the vortex loss that ventilates and press the bottom ventilation chamber, reduce the temperature rise.
Further, synchronous phase modifier tip of large capacity falls and decreases ventilation unit still includes a plurality of insulating layers, and is a plurality of the insulating layer set up respectively in inside the double-deck shielding layer copper shielding and double-deck shielding layer junction between clamping ring and the double-deck shielding layer, between double-deck shielding layer and the insulating deep bead.
The invention has the beneficial effects that: the shielding layer and the double-layer shielding layer in the loss-reducing ventilation device at the end part of the high-capacity synchronous phase modulator can guide the wind direction of the end part of the synchronous phase modulator and can shield the magnetic field at the end part of the synchronous phase modulator, reduce the eddy current loss in structural members such as a pressing ring, a pressing finger, a positioning rib and the like at the end part of the synchronous phase modulator, reduce the temperature rise of the structural member at the end part and solve the problem of local overheating caused by overlarge eddy current loss of a metal structural member at the end part of a stator of the synchronous; the shielding layer made of copper, the double-layer shielding layer, the insulating wind shield and the clamping ring form a multidirectional ventilating gap, the inner surface of the insulating wind shield is relatively parallel to the outer surfaces of the copper shielding layer and the shielding layer, the heat dissipation of the copper shielding layer and the shielding layer is accelerated, the temperature difference in the end structure of the synchronous phase modulator is reduced, and the safe operation performance of the synchronous phase modulator during operation is improved.
Drawings
Fig. 1 is an axial sectional structural schematic diagram of an end loss reduction ventilation device of a high-capacity synchronous phase modifier.
Fig. 2 is a schematic front view of a double-layer shielding layer.
Fig. 3 is a schematic sectional view in the direction of a-a in fig. 1.
Fig. 4 is a main sectional structural view of the ventilation pressing finger with a rectangular bottom ventilation cavity.
Fig. 5 is a main sectional structural view showing that the bottom ventilation cavity of the ventilation pressing finger is in a truncated cone shape.
Fig. 6 is a main sectional structural view of the bottom vent cavity of the vent press finger in a rectangular groove structure.
Fig. 7 is a schematic structural view of a magnetic shield.
FIG. 8 is a schematic axial sectional view of a bottom ventilation cavity of a synchronous phase modifier end loss reduction ventilation apparatus in a truncated cone shape.
FIG. 9 is a schematic axial cross-sectional view of a bottom vent cavity in a rectangular groove configuration in a synchronous phase modulator end loss reduction vent.
Wherein, 1, a shielding layer; 2. a double-layer shielding layer; 201. a fan-shaped shielding layer; 3. a rectangular groove; 4. pressing a ring; 5. an insulating wind deflector; 6. ventilating and pressing fingers; 7. a middle vent cavity; 8. a bottom vent chamber; 9. an axial air duct; 10. magnetic shielding; 11. a vent hole; 12. ventilating channels; 13. a synchronous phase modifier end core; 14. positioning ribs; 15. an insulating layer.
The arrows in the figure show the direction of flow of the end-ventilated cooling fluid of a high-capacity synchronous condenser.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1
As shown in fig. 1 to 4 and 7, the invention provides a loss reduction ventilation device for an end part of a high-capacity synchronous phase modifier, which comprises a pressing ring 4 and a shielding layer 1, wherein the shielding layer 1 is preferably made of copper, the pressing ring 4 is fixedly connected with an end part iron core 13 of the synchronous phase modifier through a positioning rib 14, a double-layer shielding layer 2 in a hollow structure is arranged on the front surface of the pressing ring 4, the double-layer shielding layer 2 is fixedly connected with the pressing ring 4, as shown in fig. 2, the double-layer shielding layer 2 is in a circular cover structure with a through hole in the middle, each layer of the double-layer shielding layer 2 comprises 12 fan-shaped shielding layers 201, a gap is arranged between every two adjacent fan-shaped shielding layers 201, the width of the gap is 4 to 6mm, the gaps on each layer of the double-layer shielding layer 2 are not overlapped, and the thickness of each layer of; the inner diameter of the double-layer shielding layer 2 is provided with a plurality of rectangular grooves 3, the rectangular grooves 3 are uniformly distributed along the circumferential direction, the width of each rectangular groove 3 is 2-4 mm, the depth of each rectangular groove is 10-15 mm, each fan-shaped shielding layer 201 is provided with 3 rectangular grooves 3, and the rectangular grooves 3 between the two shielding layers are not overlapped; double-deck shielding layer 2 adopts bilayer structure, and thickness is less, and every shielding layer carries out fan-shaped split and the internal diameter opens rectangular channel 3, the eddy current loss that produces in the double-deck shielding layer 2 that reduces that can be better.
The thickness of the shielding layer 1 is 8-12 mm, one end of the shielding layer 1 is arranged in the double-layer shielding layer 2, and the shielding layer 1 and the double-layer shielding layer 2 are insulated; the outer side of the double-layer shielding layer 2 is fixedly connected with an insulating wind shield 5, and the inner surface of the insulating wind shield 5 is relatively parallel to the outer surfaces of the shielding layer 1 and the shielding layer; gaps for ventilation are arranged among the double-layer shielding layer 2, the pressing ring 4 and the insulating wind shield 5; the shielding layer 1 is positioned in the gap; fixed being provided with on the 4 backs of clamping ring and ventilating and pressing and indicating 6, the pressure of ventilating indicates 6 middle parts and is provided with middle part ventilation chamber 7, and the diameter in middle part ventilation chamber 7 is 6 ~ 10mm, ventilate and press 6 bottoms be provided with the bottom ventilation chamber 8 that middle part ventilation chamber 7 communicates, and the shape in bottom ventilation chamber 8 is the rectangle, and the length and the width in bottom ventilation chamber 8 all are greater than middle part ventilation chamber 7 diameter, and the degree of depth in bottom ventilation chamber 8 is 140 ~ 180 mm. The ventilation pressure indicates that the inside bottom ventilation chamber 8 of 6 is the rectangle or is the round platform shape for 8 area of contact in bottom ventilation chamber increase, make the velocity of flow that cooling fluid got into middle part ventilation chamber 7 from bottom ventilation chamber 8 increase, promote the cooling effect that the ventilation pressure indicates 6, guaranteed simultaneously that the ventilation pressure indicates the rigidity of 6.
A plurality of axial ventilation channels 9 communicated with the middle ventilation cavity 7 are arranged on the end surface of the ventilation pressure finger 6; a plurality of axial ventilation channels 9 are uniformly distributed on the end face of the ventilation pressure finger 6, the number of the axial ventilation channels is 4-6, and the diameter of the axial ventilation channels is 6-8 mm; the end face of the ventilation pressure finger 6 is provided with a magnetic shield 10, and the magnetic shield 10 is provided with a plurality of ventilation holes 11 aligned with the axial ventilation channel 9; a ventilation groove 12 is provided between the magnetic shield 10 and the end core 13 of the synchronous phase adjuster, and the plurality of ventilation holes 11 communicate with the ventilation groove 12. Synchronous phase modifier tip falls decreases ventilation unit still includes a plurality of insulating layers 15, and a plurality of insulating layers 15 set up respectively inside double-deck shielding layer 2, shielding layer 1 and double-deck shielding layer 2 junction, clamping ring 4 and between double-deck shielding layer 2, between double-deck shielding layer 2 and insulating deep bead 5.
The shielding layer 1 and the double-layer shielding layer 2 can guide the wind direction of the end part of the synchronous phase modulator and shield the magnetic field of the end part of the synchronous phase modulator, reduce the eddy current loss in structural members such as a pressing ring 4, a pressing finger, a positioning rib 14 and the like at the end part of the synchronous phase modulator, reduce the temperature rise of the structural member at the end part and solve the problem of local overheating caused by overlarge eddy current loss of a metal structural member at the end part of a stator of the synchronous phase modulator; shielding layer 1, double-deck shielding layer 2, insulating deep bead 5 and clamping ring 4 have constituteed the multidirectional clearance that is used for the ventilation, and 5 internal surfaces of insulating deep bead are parallel relatively with the surface of shielding layer 1 and shielding layer for the heat dissipation of shielding layer 1 and shielding layer has reduced the difference in temperature among the synchronous phase modifier tip structure, has improved the safe operating performance of synchronous phase modifier when the operation.
Example 2
As shown in fig. 2, 3, 5, 7 and 8, the present embodiment is further defined on the basis of embodiment 1, the bottom ventilation cavity 8 is in a circular truncated cone structure, the small end of the bottom ventilation cavity 8 is connected with the middle ventilation cavity 7, the depth of the bottom ventilation cavity 8 is 140-180 mm, and the center line of the bottom ventilation cavity 8 coincides with the center line of the middle ventilation cavity 7. The ventilation pressure indicates that 6 inside bottom ventilation chamber 8 is the round platform shape for 8 area of contact in bottom ventilation chamber increase, make the velocity of flow that cooling fluid got into middle part ventilation chamber 7 from bottom ventilation chamber 8 increase, and fluid resistance is little, is favorable to better heat dissipation.
Example 3
As shown in fig. 2, 6, 7 and 9, the present embodiment is further limited on the basis of embodiment 1, the bottom ventilation cavity 8 is in a rectangular groove structure, the depth of the bottom ventilation cavity 8 is 140-180 mm, and the width of the bottom ventilation cavity 8 is 2-4 mm; set up bottom ventilation chamber 8 into rectangle groove structure, the circulation route of extension response vortex that can be better to reduce the vortex loss that ventilates and press 6 bottom ventilation chambers 8, reduce the temperature rise.
Claims (7)
1. The end loss reduction ventilation device for the high-capacity synchronous phase modulator is characterized by comprising a pressing ring (4) and a single-layer shielding layer (1), wherein the pressing ring (4) is fixedly connected with an end iron core (13) of the synchronous phase modulator through a positioning rib (14), the pressing ring (4) is provided with a double-layer shielding layer (2) with the inside of a hollow structure on the front surface, the double-layer shielding layer (2) is fixedly connected with the pressing ring (4), one end of the single-layer shielding layer (1) is arranged in the double-layer shielding layer (2), and the single-layer shielding layer (1) is insulated from the double-layer shielding layer (2); an insulating wind shield (5) is fixedly connected to the outer side of the double-layer shielding layer (2), and gaps for ventilation are formed among the double-layer shielding layer (2), the pressing ring (4) and the insulating wind shield (5); the single-layer shielding layer (1) is positioned in the gap;
a ventilation pressure finger (6) is fixedly arranged on the back surface of the pressing ring (4), a middle ventilation cavity (7) is arranged in the middle of the ventilation pressure finger (6), a bottom ventilation cavity (8) communicated with the middle ventilation cavity (7) is arranged at the bottom of the ventilation pressure finger (6), and a plurality of axial ventilation channels (9) communicated with the middle ventilation cavity (7) are arranged on the end surface of the ventilation pressure finger (6);
the end face of the ventilation pressure finger (6) is provided with a magnetic shield (10), and the magnetic shield (10) is provided with a plurality of ventilation holes (11) aligned with the axial ventilation channel (9);
a ventilation groove (12) is arranged between the magnetic shield (10) and the end iron core (13) of the synchronous phase modulator, and the plurality of ventilation holes (11) are communicated with the ventilation groove (12);
the double-layer shielding layer (2) is of a round cover structure, each layer of the double-layer shielding layer (2) comprises a plurality of fan-shaped shielding layers (201), a gap is formed between every two adjacent fan-shaped shielding layers, and the thickness of each layer of the double-layer shielding layer (2) is 4-6 mm;
double-deck shielding layer (2) internal diameter department is provided with a plurality of rectangular channels (3), and is a plurality of rectangular channel (3) are along its circumferencial direction evenly distributed, and the groove width of a plurality of rectangular channels (3) is 2 ~ 4mm, and the groove depth is 10 ~ 15 mm.
2. A high capacity synchronous condenser end loss reducing ventilation device according to claim 1, wherein the material of the single shielding layer (1) is copper.
3. The end loss-reducing ventilation device of the high-capacity synchronous phase modifier according to claim 1, wherein the diameter of the middle ventilation cavity (7) is 6-10 mm.
4. The high-capacity synchronous phase modifier end loss-reducing ventilation device as claimed in claim 3, wherein the bottom ventilation cavity (8) is rectangular in shape, the length and width of the bottom ventilation cavity (8) are both larger than the diameter of the middle ventilation cavity (7), and the depth of the bottom ventilation cavity (8) is 140-180 mm.
5. The end loss-reducing ventilation device for the high-capacity synchronous phase modifier according to claim 3, wherein the bottom ventilation cavity (8) is in a circular truncated cone structure, the small end of the bottom ventilation cavity (8) is connected with the middle ventilation cavity (7), the depth of the bottom ventilation cavity (8) is 140-180 mm, and the center line of the bottom ventilation cavity (8) is coincident with the center line of the middle ventilation cavity (7).
6. The end loss-reducing ventilation device for the high-capacity synchronous phase modifier according to claim 3, wherein the shape of the bottom ventilation cavity (8) is a rectangular groove structure, the depth of the bottom ventilation cavity (8) is 140-180 mm, and the width of the bottom ventilation cavity (8) is 2-4 mm.
7. The end loss-reducing ventilating device for the high-capacity synchronous phase modulator according to any one of claims 1 to 6, further comprising a plurality of insulating layers (15), wherein the insulating layers (15) are respectively arranged inside the double-layer shielding layer (2), at the joint of the single-layer shielding layer (1) and the double-layer shielding layer (2), between the pressing ring (4) and the double-layer shielding layer (2), and between the double-layer shielding layer (2) and the insulating wind shield (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011369810.6A CN112564339B (en) | 2020-11-30 | 2020-11-30 | Loss-reducing ventilation device for end part of high-capacity synchronous phase modifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011369810.6A CN112564339B (en) | 2020-11-30 | 2020-11-30 | Loss-reducing ventilation device for end part of high-capacity synchronous phase modifier |
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| CN112564339A CN112564339A (en) | 2021-03-26 |
| CN112564339B true CN112564339B (en) | 2021-07-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116131536B (en) * | 2023-04-19 | 2023-07-07 | 哈尔滨电机厂有限责任公司 | Stator end variable cross-section combined shielding structure |
| CN116155036B (en) * | 2023-04-19 | 2023-07-18 | 哈尔滨电机厂有限责任公司 | Composite ventilation stator end magnetic flux leakage shielding structure |
| CN118040939B (en) * | 2024-02-20 | 2024-07-09 | 国网青海省电力公司 | Loss reducing device and method for synchronous camera |
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