CN107910997A - A kind of large high-voltage motor winding field drying method - Google Patents
A kind of large high-voltage motor winding field drying method Download PDFInfo
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- CN107910997A CN107910997A CN201711262702.7A CN201711262702A CN107910997A CN 107910997 A CN107910997 A CN 107910997A CN 201711262702 A CN201711262702 A CN 201711262702A CN 107910997 A CN107910997 A CN 107910997A
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- motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
Abstract
The invention discloses a kind of large high-voltage motor winding field drying method, the described method comprises the following steps：Device therefor and material are got out before drying；Detect the insulation resistance of motor stator winding；The section specification of the corresponding cable of selection；Rotor is blocked, if synchronous motor is then short-circuit by rotor field coil, if winding motor is then by rotor windings short-circuit；Three-phase alternating-current supply is passed through motor three-phase windings, ensures that electric current is detected 50% or so of rated current, and to the temperature of winding in winding.The present invention utilizes live three-phase low-voltage power supply, three-phase alternating current is passed through motor stator winding, stator and rotor produce energy consumption and eddy heating for heating winding, exclude the moisture in winding, the method greatly reduces the motor drying time, avoid professional overhaul unit disintegrate it is dry caused by man power and material's expense, substantially increase rate of drying, effectively reduce the construction period and reduce cost of overhaul use, there is higher promotional value.
Description
Technical field
The invention belongs to maintenance of electrical equipment field, more particularly to a kind of large high-voltage motor winding field drying method.
Background technology
Motor is stored through longtime running, insulation ag(e)ing or the moisture absorption cause winding insulation resistance to decline, less than minimum startup standard
Shi Bixu is dried, and is all to use the dismounting from scene to send professional repair order in the past to exclude the moisture of motor interior insulation system
Position disintegrate into drying chamber drying method, this method there are maintenance duration it is long, costly the problem of, seriously affect production.
The content of the invention
It is an object of the invention to overcome problem above existing in the prior art, there is provided a kind of large high-voltage motor winding shows
Field drying means, produces energy consumption and eddy heating for heating winding by stator and rotor, excludes the moisture in winding.
To realize above-mentioned technical purpose and the technique effect, the present invention is achieved through the following technical solutions：
A kind of large high-voltage motor winding field drying method, the described method comprises the following steps：
Step 1：Device therefor and material are got out before drying；
Step 2：The insulation resistance of motor stator winding is detected, if insulating resistance value more than 0.5M Ω, enters step
Three；
Step 3：According to the half of load current value on motor nameplate, select to correspond to the section specification of cable；
Step 4：Rotor is blocked, if synchronous motor is then short-circuit by rotor field coil, if winding motor
Then by rotor windings short-circuit；
Step 5：Three-phase alternating-current supply is passed through motor three-phase windings, ensures that electric current is the 50% of rated current in winding
Left and right, and the temperature of winding is detected；
Step 6：Every two hours have a power failure and measure the insulating resistance value of a stator winding, and make a record, continuous 3 institutes
When survey insulation resistance value stabilization is constant, it is considered as dry completion.
Further, in the step 1 device therefor and material include a three-phase power transformer, three cables with
And an infrared ray point Wen Yi, wherein three-phase power transformer are used to regulate and control the voltage for accessing motor three-phase windings, electricity
Cable is connected for three-phase power transformer with motor, and infrared ray point Wen Yi is used to be detected the temperature of winding in step 5.
Further, when three-phase alternating-current supply is passed through motor three-phase windings in the step 5：When being initially powered, every 5 minutes
Measure 1 temperature, after temperature rise ease up after, can half an hour to 1 it is small when measure 1 time, ensure temperature be less than 90 DEG C.
The beneficial effects of the invention are as follows：
Three-phase alternating current is passed through motor stator winding, stator and rotor production by the present invention using live three-phase low-voltage power supply
Raw energy consumption and eddy heating for heating winding, exclude the moisture in winding, and the method greatly reduces the motor drying time, avoids professional maintenance
Man power and material's expense caused by unit disintegration is dry, substantially increases rate of drying, effectively reduces construction period and drop
Low cost of overhaul use, has higher promotional value.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is that stator leads to low voltage three-phase drying by internal heat synchronous motor circuit diagram；
Fig. 2 is that stator leads to low voltage three-phase drying by internal heat winding motor circuit diagram.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment, belongs to the scope of protection of the invention.
A kind of large high-voltage motor winding field drying method, the described method comprises the following steps：
Step 1：Device therefor and material are got out before drying, device therefor and material include a three-phase power transformation
Device, three cables and an infrared ray point Wen Yi, three-phase power transformer is in 500kVA or so；
Step 2：The insulation resistance of motor stator winding is detected, if insulating resistance value more than 0.5M Ω, enters step
Three；
Step 3：According to the half of load current value on motor nameplate, select to correspond to the section specification of cable；
Step 4：Rotor is blocked, most situations can not block rotor, because being passed through voltage
Low, low current can not drive rotor to rotate, as depicted in figs. 1 and 2, if synchronous motor is then short-circuit by rotor field coil, if
It is winding motor then by rotor windings short-circuit；
Step 5：Three-phase alternating-current supply is passed through motor three-phase windings, using three-phase power transformer to accessing motor three
The voltage of phase winding is regulated and controled, and is connected using cable to three-phase power transformer with motor, ensures that electric current exists in winding
50% or so of rated current, and being detected to the temperature of winding using infrared ray point Wen Yi, at the same can also to stator around
The embedded PT100 thermometry elements of group, by screen display as it can be seen that measured value is closer to actual value；When being initially powered, measurement 1 in every 5 minutes
Secondary temperature, after temperature rise ease up after, can half an hour to 1 it is small when measure 1 time, ensure temperature be less than 90 DEG C；
Step 6：Every two hours have a power failure and measure the insulating resistance value of a stator winding, and make a record, continuous 3 institutes
When survey insulation resistance value stabilization is constant, it is considered as dry completion.
Three-phase alternating current is passed through motor stator winding, stator and rotor production by the present invention using live three-phase low-voltage power supply
Raw energy consumption and eddy heating for heating winding, exclude the moisture in winding, and the method greatly reduces the motor drying time, avoids professional maintenance
Man power and material's expense caused by unit disintegration is dry, substantially increases rate of drying, effectively reduces construction period and drop
Low cost of overhaul use, has higher promotional value.
Basic principle, main feature and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (3)
- A kind of 1. large high-voltage motor winding field drying method, it is characterised in that：It the described method comprises the following steps：Step 1：Device therefor and material are got out before drying；Step 2：The insulation resistance of motor stator winding is detected, if insulating resistance value more than 0.5M Ω, enters step three；Step 3：According to the half of load current value on motor nameplate, select to correspond to the section specification of cable；Step 4：Rotor is blocked, if synchronous motor is then short-circuit by rotor field coil, if winding motor then will Rotor windings short-circuit；Step 5：Three-phase alternating-current supply is passed through motor three-phase windings, ensures in winding electric current 50% or so of rated current, And the temperature of winding is detected；Step 6：Every two hours have a power failure the insulating resistance value of stator winding of measurement, and makes a record, and surveys for continuous 3 times exhausted When edge resistance value stabilization is constant, it is considered as dry completion.
- A kind of 2. large high-voltage motor winding field drying method according to claim 1, it is characterised in that：The step Device therefor and material include a three-phase power transformer, three cables and an infrared ray point Wen Yi in one, wherein three Phase power transformer is used to regulate and control the voltage for accessing motor three-phase windings, and cable is used for three-phase power transformer and motor It is connected, infrared ray point Wen Yi is used to be detected the temperature of winding in step 5.
- A kind of 3. large high-voltage motor winding field drying method according to claim 1, it is characterised in that：The step When three-phase alternating-current supply is passed through motor three-phase windings in five：When being initially powered, 1 temperature of measurement in every 5 minutes, treats that temperature rises and eases up Afterwards, can half an hour to 1 it is small when measure 1 time, ensure temperature be less than 90 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711262702.7A CN107910997A (en) | 2017-12-04 | 2017-12-04 | A kind of large high-voltage motor winding field drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711262702.7A CN107910997A (en) | 2017-12-04 | 2017-12-04 | A kind of large high-voltage motor winding field drying method |
Publications (1)
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| CN107910997A true CN107910997A (en) | 2018-04-13 |
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| CN201711262702.7A Pending CN107910997A (en) | 2017-12-04 | 2017-12-04 | A kind of large high-voltage motor winding field drying method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539938A (en) * | 2018-04-23 | 2018-09-14 | 中船黄埔文冲船舶有限公司 | A kind of method that large-size machine insulation performance is improved at scene |
| CN108712037A (en) * | 2018-06-01 | 2018-10-26 | 安徽晋煤中能化工股份有限公司 | A kind of 6kV stator of synchronous motor winding drying means |
| CN108768085A (en) * | 2018-05-23 | 2018-11-06 | 安徽机电职业技术学院 | A kind of generator casing electric leakage monitoring and protective device and its application method |
| CN111025420A (en) * | 2019-11-26 | 2020-04-17 | 中广核核电运营有限公司 | Blocking test device and method for generator stator bar |
| RU2762289C1 (en) * | 2021-01-11 | 2021-12-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Installation of drying insulation of windings of three-phase asynchronous electric engine in technological pause |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101552519A (en) * | 2009-04-01 | 2009-10-07 | 杭州富春江水电设备有限公司 | Hydraulic turbogenerator short circuit drying process |
| CN106787555A (en) * | 2016-12-26 | 2017-05-31 | 天津英利新能源有限公司 | A kind of method and device of threephase asynchronous dehumidifying |
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2017
- 2017-12-04 CN CN201711262702.7A patent/CN107910997A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552519A (en) * | 2009-04-01 | 2009-10-07 | 杭州富春江水电设备有限公司 | Hydraulic turbogenerator short circuit drying process |
| CN106787555A (en) * | 2016-12-26 | 2017-05-31 | 天津英利新能源有限公司 | A kind of method and device of threephase asynchronous dehumidifying |
Non-Patent Citations (1)
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| 王智广: "大型高压异步电机的短路电流法干燥处理", 《石油工程建设》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539938A (en) * | 2018-04-23 | 2018-09-14 | 中船黄埔文冲船舶有限公司 | A kind of method that large-size machine insulation performance is improved at scene |
| CN108768085A (en) * | 2018-05-23 | 2018-11-06 | 安徽机电职业技术学院 | A kind of generator casing electric leakage monitoring and protective device and its application method |
| CN108712037A (en) * | 2018-06-01 | 2018-10-26 | 安徽晋煤中能化工股份有限公司 | A kind of 6kV stator of synchronous motor winding drying means |
| CN111025420A (en) * | 2019-11-26 | 2020-04-17 | 中广核核电运营有限公司 | Blocking test device and method for generator stator bar |
| RU2762289C1 (en) * | 2021-01-11 | 2021-12-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Installation of drying insulation of windings of three-phase asynchronous electric engine in technological pause |
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Application publication date: 20180413 |