CN114221478A - High-power high-voltage motor and wiring terminal thereof - Google Patents
High-power high-voltage motor and wiring terminal thereof Download PDFInfo
- Publication number
- CN114221478A CN114221478A CN202111445939.5A CN202111445939A CN114221478A CN 114221478 A CN114221478 A CN 114221478A CN 202111445939 A CN202111445939 A CN 202111445939A CN 114221478 A CN114221478 A CN 114221478A
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- terminal
- insulator
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- wiring terminal
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- 239000012212 insulator Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 15
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000004146 energy storage Methods 0.000 description 13
- 230000015556 catabolic process Effects 0.000 description 7
- 239000000565 sealant Substances 0.000 description 5
- 229920006335 epoxy glue Polymers 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
Abstract
The invention discloses a high-power high-voltage motor and a wiring terminal thereof, wherein the wiring terminal comprises: a binding post; the insulator is sleeved on the wiring terminal and is fixed with the wiring terminal in a sealing manner; the terminal post seat is sleeved on the insulator and is fixedly sealed with the insulator, and the terminal post seat is used for fixedly mounting a terminal on the motor; and the terminal pressing block is positioned on the end face of the terminal and used for connecting the terminal with a three-phase outgoing line of the motor, and the insulator is made of ceramic materials. The high-temperature-resistant structural adhesive is adopted between each component of the wiring terminal for sealing and fixing, the good sealing performance of the wiring terminal is guaranteed, meanwhile, the wiring terminal has certain torsional strength, and meanwhile, the insulator of the wiring terminal is prepared from ceramic materials, so that the phenomenon of discharging of a high-power high-voltage motor can be prevented.
Description
Technical Field
The invention relates to the field of high-power high-voltage motor insulation, in particular to a high-power high-voltage motor for flywheel energy storage and an anti-corona wiring terminal thereof.
Background
The flywheel energy storage system is a mechanical device for storing and releasing energy by utilizing a flywheel rotating at a high speed, a flywheel motor is an important component of the flywheel energy storage device, and the flywheel energy storage system realizes the absorption and release of electric energy through the flywheel energy storage system. When the flywheel energy storage system is charged, the direct current input electric energy is adopted to drive the motor to work in an electric state under the control of the high-speed high-power frequency converter, so that the flywheel rotor rotates in an accelerated manner, and the electric energy is converted into mechanical energy to be stored; during discharging, the flywheel rotor is decelerated to drive the motor to work in a power generation state, and stable and adjustable direct current voltage is output under the control of the power electronic device.
In the charging and discharging process of the whole flywheel energy storage system, the flywheel motor plays a bridge role of interconversion between electric energy and mechanical energy, the flywheel energy storage system needs to be charged and discharged continuously in high frequency in the fields of power grid frequency modulation, rail transit braking energy recovery and the like, the heating quantity of the flywheel motor is increased to increase the temperature of the motor, the temperature rise can affect the insulating property of an insulating material of the flywheel motor, once the insulating property of the motor is reduced, under the condition of high-voltage continuous charging and discharging, breakdown and electric arc are easy to occur, and therefore a motor winding is burnt.
The operating bus voltage of the flywheel energy storage system is high (540VDC), and phenomena such as discharge, breakdown and even electric arc and the like easily occur under the vacuum environment when the voltage is high, and the occurrence conditions can refer to a Paschen curve. As shown in fig. 1 and 2, under the vacuum condition, the discharge is severe when the residual pressure region is 10 to 100Pa, which is influenced by the air pressure state. Even in an air environment, defects or aging of the insulating material and impurities in the air can cause burning of the winding under the action of high voltage, and the safe operation of the structure body is seriously damaged. Therefore, it is necessary to improve the operation capability in a vacuum environment and the reliability of stable operation of the system.
At present, the insulation capability of a motor is generally improved from the aspects of a winding insulation structure, insulation materials, environmental conditions, a processing technology and the like in the design and manufacturing process of a high-power high-voltage motor. Even some industries coat resistance tapes with different resistances on the high-voltage motor winding to prevent corona, but the coating of the resistance tapes increases the difficulty of the manufacturing process of the motor stator. Aiming at the working characteristic that a high-power high-voltage motor for flywheel energy storage is continuously charged and discharged in a vacuum environment, a motor corona-proof wiring terminal structure which is reliable in method and convenient to operate is urgently needed.
Disclosure of Invention
The invention provides a high-power high-voltage motor and a wiring terminal thereof, wherein the wiring terminal is designed according to the specific structure of a flywheel energy storage system and has higher insulating capability, and after the wiring terminal is connected with a three-phase line of the motor, the upper end part and the lower end part of the motor and the wiring terminal are encapsulated by pouring sealant, so that the phenomena of discharge, breakdown and corona of the motor in a high-voltage and vacuum environment are prevented, the reliability of the motor is improved, and the service life of the motor is prolonged.
In order to achieve the above object, the present invention discloses a connection terminal for electrically connecting a three-phase lead-out wire of a motor, the connection terminal comprising:
a binding post;
the insulator is sleeved on the wiring terminal and is fixed with the wiring terminal in a sealing manner, and the insulator is used for connecting the wiring terminal and the motor in an insulating manner;
the terminal post seat is sleeved on the insulator and is fixed with the insulator in a sealing way, and the terminal post seat is used for fixedly installing a terminal on the motor;
and the terminal pressing block is positioned on the end surface of the terminal and used for pressing the three-phase outgoing line on the terminal.
Further, one end, close to the terminal pressing block, of the terminal is defined as a first end, and one end, far away from the terminal pressing block, of the terminal is defined as a second end; the first end of the binding post is of a first groove-shaped structure, the binding post pressing block is of a second groove-shaped structure matched with the first groove-shaped structure, the first groove-shaped structure and the second groove-shaped structure are spliced together to form a containing groove, and the containing groove is matched with the three-phase outgoing line.
Further, be equipped with the mounting hole on the first end of terminal, be equipped with coupling assembling on the terminal briquetting, through inciting somebody to action coupling assembling installs the realization will in the mounting hole the three-phase lead-out wire compresses tightly in the holding tank.
Further, the second end of the binding post adopts a thread structure so as to connect other electric elements.
Further, the insulator is made of ceramic materials.
Furthermore, the insulator comprises a first end part close to the first end of the insulator and a second end part close to the second end of the insulator, and a sealing ring is arranged between the first end part and the second end part of the insulator so as to improve the sealing performance of the connecting terminal.
Further, the outer surface of the second end of the insulator is in a thread-like structure so as to increase the creepage distance of the terminal.
Further, a seal ring is disposed between the first end of the insulator and the terminal post.
Furthermore, the binding post and the insulator as well as the insulator and the binding post seat are fixed by adopting high-temperature-resistant structural adhesive, so that the binding post has torsional strength.
The invention also discloses a high-power high-voltage motor, which comprises:
a housing;
the motor winding is positioned in the shell, and the tail end of the motor winding is connected with a three-phase outgoing line; and
three fixed mounting is in binding post on the casing, three binding post respectively with the three-phase lead-out wire is connected.
Further, after the wiring terminal is connected with the three-phase outgoing line, the end part of the motor winding and the wiring terminal are subjected to encapsulation treatment.
Further, epoxy glue is adopted for encapsulation.
Furthermore, a sealing ring is arranged between the terminal post seat of the wiring terminal and the shell so as to improve the vacuum degree in the shell.
The invention has the following advantages:
sealing rings are arranged among all components of the wiring terminal, and meanwhile, the wiring terminal is fixed by adopting high-temperature-resistant structural adhesive, so that the wiring terminal has certain torsional strength while the good sealing performance of the wiring terminal is ensured; meanwhile, the insulator of the wiring terminal is prepared from the ceramic material, so that the discharge phenomenon of the high-power high-voltage motor can be prevented. According to the high-power high-voltage motor, the three-phase outgoing line is connected with the wiring terminal and then encapsulated by the epoxy glue, so that the phenomena of corona and breakdown inside the high-voltage motor can be prevented.
Drawings
FIG. 1 is a diagram illustrating the relationship between discharge intensity and pressure.
Fig. 2 is a diagram of a vacuum discharge region.
Fig. 3 is a schematic connection diagram of a high-power high-voltage motor.
Fig. 4 is a schematic view of the terminal installation of the high-power high-voltage motor.
Fig. 5 is a schematic structural view of the connection terminal.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the invention.
As shown in fig. 3, the high-power and high-voltage motor for flywheel energy storage includes: casing 1, install stator 4, rotor 2 and motor winding 3 inside casing 1, and the three is installed binding post 6 on the casing 1, motor winding 3's output is connected with the three-phase lead-out wire, three binding post 6 respectively with the three-phase lead-out wire is connected.
As can be seen from the Paschen curve in fig. 1, the phenomena of discharge, breakdown, and even electric arc are very likely to occur in the vacuum degree of the casing 1 within the range of 10pa to 100pa, and particularly, the probability of the occurrence of the discharge phenomenon is greatly increased under the conditions that the conductive part is exposed and the conductor is close to the metal part such as the casing 1, and under the vacuum degree of 10pa to 100pa, or under the conditions that metal dust exists in the casing 1, and the like, the discharge may cause local high temperature of the motor and the connection terminal 6, and the insulating material is damaged, so that the motor winding 3 and even the motor stator 4 are burned out. Therefore, the end part of the motor winding 3 is encapsulated by the encapsulating glue 5, so that the motor conductor is thoroughly isolated from other parts in the shell 1, and the insulating capability of the motor is improved. The pouring sealant has a certain thickness and can completely coat the conductor, and the pouring sealant is fully stirred and vacuumized in the preparation process, so that bubbles and defects in the pouring sealant or on the surface of the pouring sealant are prevented, and the corona-proof capability of the motor is reduced due to the bubbles and the defects. In this embodiment, the potting adhesive 5 is epoxy glue.
The high-power high-voltage motor in the embodiment is a stator 4 and rotor 2 split structure, belongs to a permanent magnet synchronous motor, a motor winding 3 is led out through the end part of the stator 4, and the rotor 2 consists of a permanent magnet and a sheath and is not provided with a rotor winding. Three wire outlet holes with 90-degree intervals are formed in the side wall of the shell 1, and the three wiring terminals 6 are respectively installed in the three wire outlet holes and connected with a three-phase wire of the motor. The stator 4 is in interference connection with the shell 1, the shell 1 is heated to 200 ℃ and is kept warm for two hours, the stator 4 is rapidly placed into the shell 1 and is installed at a specified position when an installation gap exists between the outer circle of the stator 4 and the inner diameter of the shell 1, and then the stator is naturally cooled. And after cooling, connecting the three-phase outgoing line to the wiring terminal 6.
As shown in fig. 4 to 5, the terminal block 6 according to the present invention includes a terminal 10, an insulator, a terminal holder 13, and a terminal block 18.
The terminal 10 is generally made of brass or copper. The first end of the binding post 10 is installed inside the shell 1 and has a first groove-shaped structure, and the second end of the binding post 10 is located outside the shell 1 and has a threaded structure. As shown in fig. 1, the second end of the binding post 10 can be connected with a cable 7 to connect the high-power high-voltage motor with other electrical components. In this embodiment, the second end of the binding post 10 is connected to the cable 7 through the nut 9, so as to connect the connection terminal 6 of the high-power and high-voltage motor to the output end of the frequency converter 8.
The insulator is sleeved on the wiring terminal 10, the insulator is in sealing bonding with the wiring terminal 10 through high-temperature-resistant structural adhesive, and therefore when the wiring terminal 10 bears a certain torque, the wiring terminal and the insulator do not rotate relatively, and the wiring terminal 6 has certain torsional strength. The insulator is made of ceramic materials, and the insulating capability of the high-power high-voltage motor in a high-voltage environment can be improved. The insulator comprises a first end part 11 close to the first end of the insulator and a second end part 14 close to the second end of the insulator, and a sealing ring 12 is arranged between the first end part 11 and the second end part 14 of the insulator so as to improve the sealing performance of the connecting terminal 6. The outer surface of the second end portion 14 of the insulator is in a thread-like structure, so that the creepage distance of the terminal 6 can be increased.
The terminal block base 13 is generally made of copper or aluminum, is sleeved on the insulator and is sealed and fixed with the insulator by adopting high-temperature-resistant structural adhesive, and is used for fixedly mounting the terminal block 6 on the shell 1. A sealing ring 12 is also arranged between the terminal base 13 and the insulator to improve the sealing capability of the terminal 6. The terminal post base 13 is provided with a flange, and the terminal 6 is fixedly arranged on the shell 1 through the flange. Similarly, a sealing ring is used for sealing between the terminal base 13 and the mounting surface of the shell 1, so that the vacuum degree in the shell 1 is improved, and the friction loss during the operation of the energy storage flywheel is reduced.
The terminal pressing block 18 is located at the first end of the terminal 10 and used for pressing the three-phase outgoing line on the terminal 10, and connection between the wiring terminal 6 and the three-phase outgoing line is achieved. The terminal pressing block 18 is a second groove-shaped structure matched with the first groove-shaped structure of the terminal 10, the first groove-shaped structure and the second groove-shaped structure are spliced together to form a containing groove 16, and the containing groove 16 is matched with the size of the three-phase outgoing line. The three-phase lead-out wire connecting structure is characterized in that at least one mounting hole 15 is formed in the first groove-shaped structure, at least one connecting assembly 17 corresponding to the mounting hole 15 is arranged on the second groove-shaped structure, and the three-phase lead-out wire and the connecting terminal 6 can be fixedly connected by installing the connecting assembly 17 in the mounting hole 15. In this embodiment, mounting hole 15 is the screw hole, coupling assembling 17 adopts the screw, and the three-phase lead-out wire is put into in holding tank 16, screw on the second groove-shaped structure in the screw hole of first groove-shaped structure, can compress tightly the three-phase lead-out wire in binding post 6 completely.
And the joint of the wiring terminal 6 and the three-phase outgoing line is encapsulated by the potting adhesive 5, so that the phenomena of corona and breakdown of the high-voltage motor in a vacuum environment are prevented.
Sealing rings 12 are arranged among all components of the wiring terminal 6, and meanwhile, the wiring terminal 6 is fixed by adopting high-temperature-resistant structural adhesive, so that the wiring terminal 6 has certain torsional strength while the good sealing performance of the wiring terminal 6 is ensured; the insulator of the invention adopts ceramic materials, and can effectively prevent the high-power high-voltage motor from generating discharge phenomenon. In addition, the three-phase outgoing line of the high-power high-voltage motor is connected with the wiring terminal and then encapsulated by epoxy glue, so that the phenomena of corona and breakdown of the high-voltage motor can be prevented.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides a binding post, binding post is used for the three-phase lead-out wire of electric connection motor, its characterized in that, binding post contains:
a binding post;
the insulator is sleeved on the wiring terminal and is fixed with the wiring terminal in a sealing way;
the terminal post seat is sleeved on the insulator and is fixed with the insulator in a sealing way, and the terminal post seat is used for fixedly installing a terminal on the motor;
and the terminal pressing block is positioned on the end surface of the terminal and used for pressing the three-phase outgoing line on the terminal.
2. The terminal block according to claim 1, wherein an end of the terminal pin near the terminal block is defined as a first end, and an end of the terminal pin far from the terminal block is defined as a second end; the first end of the binding post is of a first groove-shaped structure, the binding post pressing block is of a second groove-shaped structure matched with the first groove-shaped structure, the first groove-shaped structure and the second groove-shaped structure are spliced together to form a containing groove, and the containing groove is matched with the three-phase outgoing line in size.
3. The terminal according to claim 2, wherein a mounting hole is provided on the first end of the terminal, and a connecting member is provided on the terminal block, and the three-phase lead-out wire is pressed in the receiving groove by mounting the connecting member in the mounting hole.
4. The terminal of claim 1, wherein the insulator is a ceramic material.
5. The terminal of claim 1, wherein the insulator includes a first end portion proximate to the terminal block and a second end portion distal from the terminal block, and a sealing ring is disposed between the first and second end portions of the insulator to improve sealing of the terminal.
6. The terminal of claim 5, wherein a seal is disposed between the first end of the insulator and the post.
7. The terminal of claim 5, wherein the insulator has a threaded configuration on an outer surface of the second end portion to increase a creepage distance for the terminal.
8. The terminal according to claim 1, wherein the terminal and the insulator and the terminal base are fixed by high temperature resistant structural adhesive to provide the terminal with torsional strength.
9. A high power, high voltage electrical machine, said machine comprising:
a housing;
the motor winding is positioned in the shell, and the tail end of the motor winding is connected with a three-phase outgoing line; and
three terminals according to any one of claims 1 to 9 fixedly mounted on the housing, the three terminals being connected to the three-phase outlet wires, respectively.
10. The high power high voltage motor according to claim 9, wherein a sealing ring is disposed between the terminal block of the terminal block and the housing to increase the vacuum degree inside the housing; and the connecting part of the wiring terminal and the three-phase outgoing line is subjected to encapsulation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445939.5A CN114221478A (en) | 2021-11-30 | 2021-11-30 | High-power high-voltage motor and wiring terminal thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111445939.5A CN114221478A (en) | 2021-11-30 | 2021-11-30 | High-power high-voltage motor and wiring terminal thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114221478A true CN114221478A (en) | 2022-03-22 |
Family
ID=80699074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111445939.5A Pending CN114221478A (en) | 2021-11-30 | 2021-11-30 | High-power high-voltage motor and wiring terminal thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114221478A (en) |
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|---|---|---|---|---|
| JPS61247251A (en) * | 1985-04-24 | 1986-11-04 | Mitsubishi Electric Corp | Refrigerant compressor |
| CN202340041U (en) * | 2011-10-19 | 2012-07-18 | 汤广顺 | Motor wiring terminal |
| CN102868037A (en) * | 2012-08-29 | 2013-01-09 | 苏州市意可机电有限公司 | Built-in power supply wiring terminal |
| CN103401349A (en) * | 2013-08-19 | 2013-11-20 | 南车株洲电机有限公司 | Motor and junction box thereof |
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| CN107834754A (en) * | 2017-12-04 | 2018-03-23 | 南京磁谷科技有限公司 | A kind of electric outlet structure of vacuum sealing |
| CN109510382A (en) * | 2018-12-11 | 2019-03-22 | 上海航天控制技术研究所 | A kind of novel magnetically levitated accumulated energy flywheel rotor |
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2021
- 2021-11-30 CN CN202111445939.5A patent/CN114221478A/en active Pending
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|---|---|---|---|---|
| JPS61247251A (en) * | 1985-04-24 | 1986-11-04 | Mitsubishi Electric Corp | Refrigerant compressor |
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Application publication date: 20220322 |