CN218570107U - Device for rapidly recovering insulation of large motor - Google Patents
Device for rapidly recovering insulation of large motor Download PDFInfo
- Publication number
- CN218570107U CN218570107U CN202222115055.XU CN202222115055U CN218570107U CN 218570107 U CN218570107 U CN 218570107U CN 202222115055 U CN202222115055 U CN 202222115055U CN 218570107 U CN218570107 U CN 218570107U
- Authority
- CN
- China
- Prior art keywords
- thyristor
- group
- anode
- cathode
- rectifier bridges
- 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.)
- Active
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to a device for rapidly recovering the insulation of a large-scale motor, which comprises a rectifying device; the rectifying device comprises three groups of thyristor rectifying bridges, each group of thyristor rectifying bridges comprises a coil and 4 thyristors, the anode of the first thyristor is connected with the cathode of the second thyristor, the anode of the third thyristor is connected with the cathode of the fourth thyristor, the cathode of the first thyristor is connected with the cathode of the third thyristor, the anode of the second thyristor is connected with the anode of the fourth thyristor, one end of the coil is connected with the anode of the first thyristor, and the other end of the coil is connected with the anode of the third thyristor; the anode of the second thyristor of the first group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the second group of thyristor rectifier bridges, and the anode of the second thyristor of the second group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the third group of thyristor rectifier bridges. The utility model discloses a technical mode of stator coil direct switch-on low voltage, heavy current, stator coil directly generate heat, by interior and outer quick recovery insulation resistance.
Description
Technical Field
The utility model relates to a restore insulating device of large-scale motor fast belongs to motor maintenance technical field.
Background
The large salinity of coastal power plant air humidity is high, and in the long-term outage or maintenance process of large-scale motor, the stator coil is wet easily very much, leads to motor insulation resistance to be less than the standard of putting into operation. In the prior art, a high-power baking lamp is adopted to heat the interior of a motor from outside to inside and take away moisture in the motor, the insulation recovery speed of the motor is extremely low, so that important auxiliary machines of a power plant cannot be timely turned on, the important auxiliary machines lose standby, and the safe operation of a unit is seriously influenced; in addition, the temperature around the baking lamp is very high, and combustible substances such as oil, steam and the like exist in the motor, so that fire disasters are easy to happen, and great potential safety hazards are caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem, the utility model provides a restore insulating device of large-scale motor fast, the device adopts the technical mode of stator coil direct-connection low-voltage, heavy current, and stator coil directly generates heat, by interior and outer fast recovery insulation resistance.
The technical scheme of the utility model as follows:
a device for rapidly recovering insulation of a large-sized motor comprises a low-voltage alternating current power supply and a rectifying device, wherein the low-voltage alternating current power supply provides low-voltage alternating current for the rectifying device, and the rectifying device outputs direct-current voltage to the motor to be recovered after rectification; the rectifying device comprises three groups of thyristor rectifying bridges, and each group of thyristor rectifying bridges comprises a coil and 4 thyristors; the anode of the first thyristor of each group of thyristor rectifier bridges is connected with the cathode of the second thyristor, the anode of the third thyristor is connected with the cathode of the fourth thyristor, the cathode of the first thyristor is connected with the cathode of the third thyristor, the anode of the second thyristor is connected with the anode of the fourth thyristor, one end of the coil is connected with the anode of the first thyristor, the other end of the coil is connected with the anode of the third thyristor, and the induced voltages generated by the three groups of thyristor rectifier bridges in the coil have the same direction; the anode of the second thyristor of the first group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the second group of thyristor rectifier bridges, and the anode of the second thyristor of the second group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the third group of thyristor rectifier bridges; the cathode of the first thyristor of the first group of thyristor rectifier bridges and the anode of the second thyristor of the third group of thyristor rectifier bridges are connected with any two phases of the motor to be recovered.
The voltage acquisition device is respectively connected with the cathode of the first thyristor of the first group of thyristor rectifier bridges and the anode of the second thyristor of the third group of thyristor rectifier bridges, and is used for acquiring the output voltage of the rectifier device; the voltage acquisition device is electrically connected with the display.
Further, a coil is arranged between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the motor to be recovered.
Furthermore, an ammeter is arranged between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the motor to be recovered.
Further, an overcurrent protection switch is arranged between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the motor to be recovered.
Further, the low-voltage alternating current power supply is a 220V alternating current power supply.
The utility model discloses following beneficial effect has:
the device makes the stator coil directly generate heat through the technical mode of directly switching on low voltage and large current to the stator coil, and the insulation resistance is rapidly recovered from inside to outside. The defects that the insulation recovery is slow, the local temperature is too high and the fire risk is high in the traditional 'baking lamp' mode are overcome. Meanwhile, the device has three-gear adjustment, and can adjust the output voltage according to the requirement.
Drawings
Fig. 1 is a schematic diagram of a module structure according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a rectifying device according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of the embodiment of the present invention during installation.
The reference numbers in the figures denote:
1. a low voltage AC power supply; 2. a rectifying device; 3. a motor to be recovered; 4. a voltage acquisition device; 5. and a display.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-3, a device for rapidly recovering insulation of a large-sized motor comprises a low-voltage alternating current power supply 1 and a rectifying device 2, wherein the low-voltage alternating current power supply 1 provides low-voltage alternating current for the rectifying device 2, and the rectifying device 2 outputs direct-current voltage to a motor 3 to be recovered after rectification; the rectifying device 2 comprises three groups of thyristor rectifying bridges, and each group of thyristor rectifying bridges comprises a coil and 4 thyristors; the anode of the first thyristor of each group of thyristor rectifier bridges is connected with the cathode of the second thyristor, the anode of the third thyristor is connected with the cathode of the fourth thyristor, the cathode of the first thyristor is connected with the cathode of the third thyristor, the anode of the second thyristor is connected with the anode of the fourth thyristor, one end of the coil is connected with the anode of the first thyristor, the other end of the coil is connected with the anode of the third thyristor, and the induced voltages generated by the three groups of thyristor rectifier bridges in the coil have the same direction; the anode of the second thyristor of the first group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the second group of thyristor rectifier bridges, and the anode of the second thyristor of the second group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the third group of thyristor rectifier bridges; the cathode of the first thyristor of the first group of thyristor rectifier bridges and the anode of the second thyristor of the third group of thyristor rectifier bridges are connected with any two phases of the motor 3 to be recovered.
When the direct-current motor recovery device is used, direct-current voltage is output through the cathode of the first thyristor of the first group of thyristor rectifying bridge and the anode of the second thyristor of the third group of thyristor rectifying bridge, the cathode of the first thyristor of the first group of thyristor rectifying bridge and the anode of the second thyristor of the third group of thyristor rectifying bridge are connected with any two phases of the motor 3 to be recovered, so that stator coils between the two phases directly generate heat, and after the direct-current motor recovery device is used, the cathode of the first thyristor of the first group of thyristor rectifying bridge and the anode of the second thyristor of the third group of thyristor rectifying bridge are connected with the other two phases of the motor 3 to be recovered until all the stator coils recover.
By controlling the trigger angles of the thyristors of different thyristor rectifier bridges, different direct-current voltage outputs can be realized.
In an embodiment of the present invention, the power supply further comprises a voltage collecting device 4 and a display 5, wherein the voltage collecting device 4 is respectively connected to a cathode of the first thyristor of the first group of thyristor rectifier bridges and an anode of the second thyristor of the third group of thyristor rectifier bridges to collect an output voltage of the rectifier device; the voltage acquisition device 4 is electrically connected with the display 5. The DC output voltage monitoring device is used for monitoring the DC output voltage and is convenient to control.
In an embodiment of the present invention, a coil is further disposed between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the motor 3 to be recovered.
In an embodiment of the present invention, an ammeter is further disposed between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the to-be-recovered motor 3.
In an embodiment of the present invention, an overcurrent protection switch is further disposed between the cathode of the first thyristor of the first group of thyristor rectifier bridges or the anode of the second thyristor of the third group of thyristor rectifier bridges and the motor 3 to be recovered.
In an embodiment of the present invention, the low voltage ac power supply 1 is a 220V ac power supply. The 220V alternating current power supply is convenient to obtain.
Referring to fig. 1-3, the working principle of the present invention is as follows:
the utility model discloses when using, connect the device and accomplish the back, change direct current output voltage through controlling each thyristor.
The maximum output voltage of the rectifying device is V MAX When the DC voltage required to be output is lower than 1/3V MAX While the third and fourth thyristors of the second and third sets of thyristor rectifier bridges are turned on (e.g., VT of FIG. 2) 23 、VT 24 、VT 33 And VT 34 ) The output direct voltage can be controlled to be 0-1/3V by controlling the trigger angle of the first group of thyristor rectifier bridge thyristors MAX And (4) adjusting.
When the direct current voltage needing to be output is 1/3V MAX -2/3V MAX In between, the third thyristor and the fourth thyristor of the third group of thyristor rectifier bridges are turned on (e.g. VT of fig. 2) 33 And VT 34 ) The trigger angle of the first group of thyristor rectifier bridge thyristors is 0 degree, and the second group of thyristor rectifier bridge thyristors are controlledThe trigger angle of (2) can make the output direct-current voltage be 1/3V MAX -2/3V MAX And (4) adjusting.
When the direct current voltage needing to be output is 2/3V MAX -V MAX In the meantime, the trigger angle of the thyristors of the first group of thyristor rectifier bridge and the second group of thyristor rectifier bridge is 0 degree, and the output direct-current voltage can be controlled at 2/3V by controlling the trigger angle of the thyristors of the third group of thyristor rectifier bridge MAX -V MAX And (4) adjusting.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same principle as the protection scope of the present invention.
Claims (6)
1. The device for quickly recovering the insulation of the large-sized motor is characterized by comprising a low-voltage alternating current power supply (1) and a rectifying device (2), wherein the low-voltage alternating current power supply (1) provides low-voltage alternating current for the rectifying device (2), and the rectifying device (2) outputs direct-current voltage to a motor (3) to be recovered after rectification; the rectifying device (2) comprises three groups of thyristor rectifying bridges, and each group of thyristor rectifying bridges comprises a coil and 4 thyristors; the anode of the first thyristor of each group of thyristor rectifier bridges is connected with the cathode of the second thyristor, the anode of the third thyristor is connected with the cathode of the fourth thyristor, the cathode of the first thyristor is connected with the cathode of the third thyristor, the anode of the second thyristor is connected with the anode of the fourth thyristor, one end of the coil is connected with the anode of the first thyristor, the other end of the coil is connected with the anode of the third thyristor, and the directions of induced voltages generated in the coil by the three groups of thyristor rectifier bridges are the same; the anode of the second thyristor of the first group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the second group of thyristor rectifier bridges, and the anode of the second thyristor of the second group of thyristor rectifier bridges is connected with the cathode of the first thyristor of the third group of thyristor rectifier bridges; the cathode of the first thyristor of the first group of thyristor rectifier bridges and the anode of the second thyristor of the third group of thyristor rectifier bridges are connected with any two phases of the motor (3) to be recovered.
2. The apparatus for rapidly restoring the insulation of the large motor according to claim 1, further comprising a voltage collecting device (4) and a display (5), wherein the voltage collecting device (4) is respectively connected with the cathode of the first thyristor of the first group of thyristor rectifier bridges and the anode of the second thyristor of the third group of thyristor rectifier bridges to collect the output voltage of the rectifier device; the voltage acquisition device (4) is electrically connected with the display (5).
3. Device for the rapid recovery of the insulation of large motors according to claim 1, characterised in that between the cathode of said first thyristor of the first group of thyristor rectifier bridges or the anode of said second thyristor of the third group of thyristor rectifier bridges and the motor (3) to be recovered there is also provided a coil.
4. Device for the rapid recovery of the insulation of large motors according to claim 1, characterised in that an ammeter is also provided between the cathode of said first thyristor of the first group of thyristor rectifier bridges or the anode of said second thyristor of the third group of thyristor rectifier bridges and the motor (3) to be recovered.
5. Device for the rapid recovery of the insulation of large motors according to claim 1, characterized in that an overcurrent protection switch is also arranged between the cathode of said first thyristor of the first group of thyristor rectifier bridges or the anode of said second thyristor of the third group of thyristor rectifier bridges and the motor (3) to be recovered.
6. Device for the rapid recovery of the insulation of large motors according to claim 1, characterized in that the low voltage alternating current power supply (1) is a 220V alternating current power supply.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222115055.XU CN218570107U (en) | 2022-08-11 | 2022-08-11 | Device for rapidly recovering insulation of large motor |
| PCT/CN2023/090847 WO2024032034A1 (en) | 2022-08-11 | 2023-04-26 | Device for rapidly recovering insulation of large motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222115055.XU CN218570107U (en) | 2022-08-11 | 2022-08-11 | Device for rapidly recovering insulation of large motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218570107U true CN218570107U (en) | 2023-03-03 |
Family
ID=85308975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222115055.XU Active CN218570107U (en) | 2022-08-11 | 2022-08-11 | Device for rapidly recovering insulation of large motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN218570107U (en) |
| WO (1) | WO2024032034A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032034A1 (en) * | 2022-08-11 | 2024-02-15 | 华能(福建)能源开发有限公司清洁能源分公司 | Device for rapidly recovering insulation of large motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004336836A (en) * | 2003-04-30 | 2004-11-25 | Honda Motor Co Ltd | Motor driving device |
| CN202840870U (en) * | 2012-09-17 | 2013-03-27 | 无锡航天万源新大力电机有限公司 | Thermal immersion heating system for stator winding |
| CN203225667U (en) * | 2013-04-15 | 2013-10-02 | 保定尼尔变流器有限公司 | High-power-factor low-ripple electrophoretic coating rectifying device |
| RU2608074C1 (en) * | 2015-07-27 | 2017-01-13 | Акционерное Общество "Талас Электрик Ою" | Electric machine windings drying method and device for its implementation |
| CN212017327U (en) * | 2020-04-15 | 2020-11-27 | 江苏星宇电机有限公司 | Motor dehumidification device |
| CN218570107U (en) * | 2022-08-11 | 2023-03-03 | 华能(福建)能源开发有限公司清洁能源分公司 | Device for rapidly recovering insulation of large motor |
-
2022
- 2022-08-11 CN CN202222115055.XU patent/CN218570107U/en active Active
-
2023
- 2023-04-26 WO PCT/CN2023/090847 patent/WO2024032034A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032034A1 (en) * | 2022-08-11 | 2024-02-15 | 华能(福建)能源开发有限公司清洁能源分公司 | Device for rapidly recovering insulation of large motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024032034A1 (en) | 2024-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103647458B (en) | Frequency conversion system and carry out the method and apparatus of precharge to the high voltage converter in it | |
| CN218570107U (en) | Device for rapidly recovering insulation of large motor | |
| CN110311578A (en) | A kind of magnetic motor for motorcycle output voltage segmentation method for rectifying and pressure regulator | |
| CN108539872A (en) | A kind of electricity getting system based on power line load electric current | |
| CN104253549A (en) | LCL filtering-based circuit topology structure of high-power PWM (pulse-width modulation) rectifier | |
| CN110932215A (en) | System and method for deicing overhead line by using photovoltaic power generation | |
| CN204794746U (en) | Active synchronous Rectifier circuit of three -phase | |
| CN206611355U (en) | A kind of current feedback device under permagnetic synchronous motor startup, braking | |
| CN205960785U (en) | Novel static switch | |
| CN213693156U (en) | High-voltage synchronous grid-connected system | |
| CN207218264U (en) | A kind of photovoltaic plant high-tension transformer no-flashy-flow switching circuit | |
| CN206472072U (en) | Power supply unit for intermediate frequency furnace water cooling plant | |
| CN205709660U (en) | A kind of drive circuit of elevator brake | |
| CN204696962U (en) | A kind of starting of three phases motor controller | |
| CN218276495U (en) | Compact rectifying device | |
| CN204231206U (en) | The frequency converter of low-voltage alternating-current speed governing | |
| CN110941303A (en) | Voltage stabilizing transformer based on magnetically controlled reactor | |
| CN202817718U (en) | Motor open-phase protecting device with no auxiliary power supply | |
| CN203690944U (en) | Low voltage ride through power supply system | |
| CN116317056B (en) | Low-voltage ride-through circuit and low-voltage ride-through method | |
| CN201937490U (en) | SCR interphase short circuit rectifying and voltage-stabilizing circuit for three-phase voltage regulator | |
| CN202748418U (en) | H-bridge full-power testing device | |
| CN208353236U (en) | Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit | |
| CN216564521U (en) | Three-phase low-voltage compensation device | |
| CN215835340U (en) | Small electronic excitation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |