CN202840870U - Thermal immersion heating system for stator winding - Google Patents
Thermal immersion heating system for stator winding Download PDFInfo
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- CN202840870U CN202840870U CN 201220473911 CN201220473911U CN202840870U CN 202840870 U CN202840870 U CN 202840870U CN 201220473911 CN201220473911 CN 201220473911 CN 201220473911 U CN201220473911 U CN 201220473911U CN 202840870 U CN202840870 U CN 202840870U
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Abstract
The utility model discloses a thermal immersion heating system for a stator winding. A control unit of the heating system acquires the overall temperature of the stator winding according to a DC voltage signal and a DC current signal on two ends of the stator winding, sends a control signal according to the temperature, and adjusts a voltage that is input to the stator winding, so as to adjust the temperature of the stator winding. The thermal immersion heating system for the stator winding is high in control precision, and stable in operation, can flexibly adjust the temperature of the stator winding as needed, solves the contradiction between permeability and adhesiveness of insulating paint in the thermal immersion technology of the stator winding, and the abovementioned heating system is used to enable the stator winding after paint immersion to be quick heated up to above the gelling temperature of the insulating paint, shortening the dripping time of the insulating paint, and increasing the adhered paint amount of the stator winding.
Description
Technical field
The utility model relates to motor stator winding manufacturing technology field, relates in particular to the heat sink heating system of soaking of a kind of stator winding.
Background technology
Motor stator winding generally is divided into hard winding and loose around two kinds of forms of winding.Hard winding is called again formed coil, is the motor coil that is pressed into solid shape by magnet strip; Faling apart then refers to adopt multiply enamel-cover circle line around winding, the soft unfixed stator coil of shape.In general, hard winding is high because of its voltage withstand class, and insulation property are relatively reliable, and are multiplex in high-voltage motor, or powerful low voltage motor; Loose winding then is used for low power low voltage motor mostly, and its insulation property are reliable not as hard winding, but the advantages such as cost is low, making is simple, material-saving are also arranged.
In recent years, the production of direct wind-driven generator, manufacturing fast development, because its stator diameter large (diameter is all more than 5 meters mostly), if adopt hard winding as stator coil, not only the winding cost is high, manufacturing cycle is long, also and also need to be equipped with large diameter vacuum pressure impregnation equipment, equipment investment is very large, therefore, adopt loose can decrease complete machine cost around the winding stator, in more and more fierce market competition, the acquisition advantage, but in the present process, there is a large difficult problem, stator dipping problem that Here it is.
Motor stator needs whole dipping lacquer after finishing rule, to improve insulation property, strengthen the heat-sinking capability of motor, and the quality of motor dipping lacquer quality is very large on the impact of motor performance.Hard winding electric machine stator, because stator winding is surrounded by the multi layer cloud master tape outward, admittedly the ability of coating with lacquer is strong, in the baking and curing process behind the dipping lacquer, insulating varnish is difficult for running off, the dipping of therefore hard winding stator is reasonable.Comparatively speaking, loose dipping lacquer around the winding electric machine stator is a relatively stator winding of stubborn problem, particularly large wire gauge at present, because the space in the winding is large, insulating varnish can't be lived admittedly, can't satisfy basic extension lacquer amount requirement, has seriously limited the loose scope of application around the winding stator.Do you so, in present process, study carefully that to compete be the loose effect around the winding stator dipping of what factor affecting? the problem that mainly contains two aspects is difficult to solve.First aspect, the viscosity of insulating varnish requires contradiction, because if select full-bodied insulating varnish, the permeability of lacquer is just poor so, just is difficult to during motor-stator dipped lacquer soak into, and selects the low viscosity lacquer, permeability has improved, and the surface tension of lacquer and adhesive force reduce, and insulating varnish just is easy to run off; Second aspect, stator adopt the external heat method in oven dry, solidification process, programming rate is slow, the time is long, and the time that the insulating varnish in the winding runs off is long, and number of dropouts is just large.To this problem, the related personnel has carried out a lot of effort and exploration in the industry, but effect is not ideal or be difficult to carry out.
The utility model content
The purpose of this utility model is to provide a kind of stator winding the heat sink heating system of soaking, it operates steadily, can detect in real time the bulk temperature of stator winding, and implement whole closed-loop control, and then controlled well the viscosity of insulating varnish, to solve the heat sink problem that exists of soaking of stator winding in the prior art.
For reaching this purpose, the utility model by the following technical solutions:
A kind of stator winding is heat sink to soak heating system, comprises power supply unit, rectification unit, filtering voltage regulation unit, electric current and voltage detecting unit and control unit;
The ac voltage rectifier that described rectification unit is used for power supply unit output is direct voltage, and exports to the filtering voltage regulation unit;
Described filtering voltage regulation unit is connected with rectification unit, is used for that described direct voltage is carried out filtering and processes, and the direct voltage of stable output heats to the stator winding;
Described electric current and voltage detecting unit is connected with the filtering voltage regulation unit, for detection of d. c. voltage signal and the dc current signal at described stator winding two ends, and exports to control unit;
Described control unit is connected with electric current and voltage detecting unit and rectification unit, be used for described d. c. voltage signal and dc current signal are processed, obtain the real time temperature information of described stator winding, and transmit control signal to rectification unit according to this temperature information, adjust the output voltage of rectification unit, to regulate the temperature of described stator winding.
Especially, described rectification unit comprises intelligent switch, rectifier transformer and rectification driver;
Wherein, the input of described intelligent switch connects the output of power supply unit, its output connects the input of rectifier transformer, the output of described rectifier transformer respectively connects a described rectification driver, the output of described rectification driver connects filtering voltage regulation unit, its control end connection control unit;
The AC voltage conversion that described rectifier transformer is used for power supply unit output is polyphase ac voltage, and exports to the rectification driver;
Described rectification driver is used for the control signal according to control unit output, the output of control direct voltage.
Especially, described filtering voltage regulation unit comprises smoothing reactor and filter regulator circuit;
Wherein, the output of described rectification driver connects respectively the input of described smoothing reactor and the first input end of described filter regulator circuit, the output of described smoothing reactor connects the second input of described filter regulator circuit, the first output of described filter regulator circuit connects described electric current and voltage detecting unit, and the second output connects described electric current and voltage detecting unit and described stator winding;
Described smoothing reactor is used for suppressing the ripple of described rectification driver output dc voltage;
Described filter regulator circuit is used for the direct voltage of input is carried out the filtering processing, and the direct voltage of stable output heats to the stator winding.
Especially, described electric current and voltage detecting unit comprises voltage sensor and current sensor;
Wherein, described voltage sensor is connected in parallel between first output and the second output of described filter regulator circuit, its voltage signal output end connects described control unit, described current sensor is connected in series between first output and described stator winding of described filter regulator circuit, and its current signal output end connects described control unit;
Described voltage sensor is for detection of the d. c. voltage signal at described stator winding two ends, and exports to control unit;
Described current sensor is for detection of the dc current signal on the described stator winding, and exports to control unit.
Especially, described control unit is selected programmable logic controller (PLC) (PLC), be used for the resistance value that d. c. voltage signal and dc current signal according to input calculate described stator winding, utilize described resistance value to calculate the real time temperature information of described stator winding, and described temperature information analyzed rear output control signal, adjust the output voltage of rectification driver, to regulate the heating-up temperature of described stator winding.
Especially, described rectifier transformer is selected the 12-phase rectification transformer.
Especially, described filter regulator circuit comprises the first electric capacity, the second electric capacity, resistance and diode;
Wherein, described the first electric capacity is connected with diodes in parallel, is connected with the first Capacitance parallel connection after described the second electric capacity is connected with resistance.
The utility model carries out rectification by 12-phase rectification transformer and rectification driver to the alternating voltage of power supply unit, has satisfied the required precision to the direct current output waveform.Detect respectively the d. c. voltage signal in the stator winding and dc current signal in the heating circuit by voltage sensor and current sensor, programmable logic controller (PLC) calculates the bulk temperature of stator winding according to this d. c. voltage signal and dc current signal, and transmit control signal to the rectification driver according to this temperature, the output of control direct voltage, and then the heating-up temperature of regulating stator winding, the control mode of this closed loop, solved the contradiction of insulating varnish permeability and tack aspect in the heat sink soaking technology of stator winding, and use said heating system the stator winding behind the dipping lacquer can be rapidly heated more than the gelling temp of insulating varnish, shorten the Drain time of insulating varnish, improved the extension lacquer amount of stator winding.
Description of drawings
Fig. 1 is insulating varnish viscosity and the temperature relation figure that the utility model embodiment provides;
Fig. 2 is the heat sink heating system block diagram that soaks of stator winding that the utility model embodiment provides;
Fig. 3 is the heat sink heating system circuit structure diagram that soaks of stator winding that the utility model embodiment provides.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Principle of the present utility model is as follows: first key property of insulating varnish is the negative correlation of viscosity and temperature.As shown in Figure 1, that shown in Figure 1 is viscosity and the temperature relation figure of a typical insulating varnish.As can be seen from the figure, along with the rising of temperature of insulating paint, the viscosity of insulating varnish declines to a great extent, and for example the insulating varnish viscosity 23 ℃ the time is 155mPas (milli handkerchief second), and when temperature was elevated to 50 ℃, viscosity dropped to 54mPas.Therefore we can utilize this characteristic, adopt full-bodied insulating varnish, pass through heating system, when stator winding lacquer dipping, stator winding is heated to suitably high temperature (such as 50-60 ℃), so that the insulating varnish local temperature that contacts with stator winding raises, viscosity descends, can fully be penetrated into stator winding inside, after dipping lacquer is finished, allow again stator winding be cooled to normal temperature, recover the tack of insulating varnish, so just solve the contradiction of insulating varnish permeability and tack aspect, hung the lacquer effect to improve.
Second key property of insulating varnish is the PhastGel under the high temperature.It is general when the temperature of insulating varnish reaches 150 ℃, insulating varnish can be at 2-3 minute short time inner gel, namely be in semi-cured state, lose flowability, if the stator winding after therefore using heating system with dipping lacquer is rapidly heated more than the gelling temp of insulating varnish, so just can reduce the Drain time of insulating varnish, allow more insulating varnish be retained in the stator winding, realize the target of the extension lacquer amount of raising stator winding.
In such scheme, key is that the described heating system of a cover will be arranged, and it is high that this heating system wants to satisfy control precision, and power is powerful, can at short notice stator winding be heated to required temperature, can be to the flexible of carrying out of stator winding temperature.
As shown in Figure 2, the stator winding 106 heat sink heating systems of soaking comprise power supply unit 101, rectification unit 102, filtering voltage regulation unit 103, electric current and voltage detecting unit 104 and control unit 105 in the present embodiment.
The ac voltage rectifier that described rectification unit 102 is used for power supply unit 101 outputs is direct voltage, and exports to filtering voltage regulation unit 103.
Described filtering voltage regulation unit 103 is connected with rectification unit 102, is used for that described direct voltage is carried out filtering and processes, and the direct voltage of stable output is to 106 heating of stator winding.
Described electric current and voltage detecting unit 104 is connected with filtering voltage regulation unit 103, for detection of d. c. voltage signal and the dc current signal at described stator winding 106 two ends, and exports to control unit 105.
Described control unit 105 is connected with electric current and voltage detecting unit 104 and rectification unit 102, be used for described d. c. voltage signal and dc current signal are processed, obtain the real time temperature information of described stator winding 106, and transmit control signal to rectification unit 102 according to this temperature information, adjust the output voltage of rectification unit 102, to regulate the temperature of described stator winding 106.
As shown in Figure 3, Fig. 3 is the stator winding 106 heat sink heating system circuit structure diagrams that soak that the utility model embodiment provides.
Wherein, the input of described intelligent switch K connects the output of power supply unit 101, its output connects the input of rectifier transformer T, the output of described rectifier transformer T respectively connects a described rectification driver RE, the control end of described rectification driver RE connects programmable logic controller (PLC) LC, its output connects respectively the input of described smoothing reactor L and the first input end of described filter regulator circuit, the output of described smoothing reactor L connects the second input of described filter regulator circuit, the first output of described filter regulator circuit connects an end of described voltage sensor SV and stator winding 106, described voltage sensor SV is connected in parallel between first output and the second output of described filter regulator circuit, its voltage signal output end connects programmable logic controller (PLC) LC, described current sensor SA is connected in series between the other end of the first output of described filter regulator circuit and described stator winding 106, and its current signal output end connects programmable logic controller (PLC) LC.The first capacitor C 1 and diode D are connected in parallel in the described filter regulator circuit, are connected in parallel with the first capacitor C 1 after the second capacitor C 2 and resistance R 0 are connected in series.
Described power supply unit 101 is used to the heating system power supply, and when intelligent switch K was closed, just the alternating voltage of three-phase 380V was exported to rectifier transformer T.
The AC voltage conversion that described rectifier transformer T is used for three-phase 380V is polyphase ac voltage, and exports to rectification driver RE.
Because direct voltage and the current value of rectification driver RE output will be detected as control signal, therefore excessive harmonic signal will cause distorted signals in the voltage and current of output, causes the heating system collapse.The output waveform of common three-phase and Six-phase rectifier transformer is can not satisfy control far away to require.Determine to adopt in the present embodiment the 12-phase rectification transformer with research by analysis, and in current circuit the suitable filter reactor of series connection, can obtain so all the time continuous waveform that requires of gamut.Described filter reactor namely refers to the smoothing reactor L in the present embodiment.
Described rectification driver RE is used for the control signal according to control unit 105 outputs, the output of control direct voltage.
Rectification driver RE adopts thyristor, accepts the control signal from programmable logic controller (PLC) LC, adjusts the direct voltage of output.Owing to adopting the full-wave rectification of ten two-phases, can export comparatively stable dc waveform.
Described smoothing reactor L is used for suppressing the ripple of described rectification driver RE output dc voltage.
Smoothing reactor L can further weaken the harmonic wave in the output dc voltage, lowers the ripple coefficient of total power scope.
Described filter regulator circuit is used for the direct voltage of input is carried out the filtering processing, and the direct voltage of stable output is to 106 heating of stator winding.
This filter regulator circuit can be realized two functions: the first, by capacitance-resistance filter, and the harmonic wave in the output of filtering direct current.The second, current stabilization, voltage stabilizing function.Make the dc voltage stability of output.When voltage ripple of power network is 10%, require the fluctuation of direct voltage output to be not more than 1%.Why to control the fluctuation of direct voltage output amount, because the motor stator load can be regarded a large inductive element as, when being input to the change in voltage of load, the variation of electric current will lag behind the variation of voltage, FPGA (Field Programmable Gate Array) control unit 105 has just departed from true value when calculating the resistance value of stator winding 106 so, cause distorted signals, can cause system crash when serious.
Described voltage sensor SV is for detection of the d. c. voltage signal at described stator winding 106 two ends, and exports to programmable logic controller (PLC) LC.
Described current sensor SA is for detection of the dc current signal on the described stator winding 106, and exports to programmable logic controller (PLC) LC.
Described programmable logic controller (PLC) LC is used for according to formula
Calculate in real time the resistance value of described stator winding 106, utilize described resistance value according to formula
Calculate the real time temperature information of described stator winding 106, and described temperature information is analyzed rear output control signal, adjust the output voltage of rectification driver RE, to regulate the heating-up temperature of described stator winding 106;
Wherein, R is the real-time resistance value of stator winding 106, V is the dc voltage value at stator winding 106 two ends that detect of voltage sensor SV, I is the DC current values on the stator winding 106 that detects of current sensor SA, T is the real time temperature of stator winding 106, and R1 is the resistance of stator winding 106 when known temperature T1.For convenience of calculation, the resistance value of the stator winding 106 that the value of R1 records when being generally normal temperature T1, but be not limited to this, as required flexible choice.Programmable logic controller (PLC) LC at ± 2 ℃, can satisfy the requirement of stator winding 106 heat sink soaking technologies to the control precision of stator winding 106 heating fully in the present embodiment.
The heat sink heating system control precision of soaking of stator winding is high in the present embodiment, power is powerful, can at short notice stator winding be heated to required temperature, can carry out flexible to the temperature of stator winding, solved the contradiction of insulating varnish permeability and tack aspect in the heat sink soaking technology of stator winding, and use this heating system the stator winding behind the dipping lacquer can be rapidly heated more than the gelling temp of insulating varnish, shortened the Drain time of insulating varnish, allow more insulating varnish be retained in the stator winding, improved the extension lacquer amount of stator winding, reduce simultaneously the economic loss of insulating varnish loss and the disposal cost of environmental protection aspect, reduced whole heat sink input cost and operating cost of soaking equipment.
Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model is not limited by above-mentioned example; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various variations and change, and these variations and change all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1. the heat sink heating system of soaking of stator winding is characterized in that, comprises power supply unit, rectification unit, filtering voltage regulation unit, electric current and voltage detecting unit and control unit;
The ac voltage rectifier that described rectification unit is used for power supply unit output is direct voltage, and exports to the filtering voltage regulation unit;
Described filtering voltage regulation unit is connected with rectification unit, is used for that described direct voltage is carried out filtering and processes, and the direct voltage of stable output heats to the stator winding;
Described electric current and voltage detecting unit is connected with the filtering voltage regulation unit, for detection of d. c. voltage signal and the dc current signal at described stator winding two ends, and exports to control unit;
Described control unit is connected with electric current and voltage detecting unit and rectification unit, be used for described d. c. voltage signal and dc current signal are processed, obtain the real time temperature information of described stator winding, and transmit control signal to rectification unit according to this temperature information, adjust the output voltage of rectification unit, to regulate the temperature of described stator winding.
2. the heat sink heating system of soaking of stator winding according to claim 1 is characterized in that, described rectification unit comprises intelligent switch, rectifier transformer and rectification driver;
Wherein, the input of described intelligent switch connects the output of power supply unit, its output connects the input of rectifier transformer, the output of described rectifier transformer respectively connects a described rectification driver, the output of described rectification driver connects filtering voltage regulation unit, its control end connection control unit;
Described rectifier transformer is used for the ac voltage rectifier of power supply unit output is transformed to polyphase ac voltage, and exports to the rectification driver;
Described rectification driver is used for the control signal according to control unit output, the output of control direct voltage.
3. the heat sink heating system of soaking of stator winding according to claim 2 is characterized in that, described filtering voltage regulation unit comprises smoothing reactor and filter regulator circuit;
Wherein, the output of described rectification driver connects respectively the input of described smoothing reactor and the first input end of described filter regulator circuit, the output of described smoothing reactor connects the second input of described filter regulator circuit, the first output of described filter regulator circuit connects described electric current and voltage detecting unit, and the second output connects described electric current and voltage detecting unit and described stator winding;
Described smoothing reactor is used for suppressing the ripple of described rectification driver output dc voltage;
Described filter regulator circuit is used for the direct voltage of input is carried out the filtering processing, and the direct voltage of stable output heats to the stator winding.
4. the heat sink heating system of soaking of stator winding according to claim 3 is characterized in that, described electric current and voltage detecting unit comprises voltage sensor and current sensor;
Wherein, described voltage sensor is connected in parallel between first output and the second output of described filter regulator circuit, its voltage signal output end connects described control unit, described current sensor is connected in series between first output and described stator winding of described filter regulator circuit, and its current signal output end connects described control unit;
Described voltage sensor is for detection of the d. c. voltage signal at described stator winding two ends, and exports to control unit;
Described current sensor is for detection of the dc current signal on the described stator winding, and exports to control unit.
5. the heat sink heating system of soaking of stator winding according to claim 4, it is characterized in that, described control unit is selected programmable logic controller (PLC) (PLC), be used for the resistance value that d. c. voltage signal and dc current signal according to input calculate described stator winding, utilize described resistance value to calculate the real time temperature information of described stator winding, and described temperature information analyzed rear output control signal, adjust the output voltage of rectification driver, to regulate the heating-up temperature of described stator winding.
6. the heat sink heating system of soaking of stator winding according to claim 5 is characterized in that, described rectifier transformer is selected the 12-phase rectification transformer.
7. the heat sink heating system of soaking of stator winding according to claim 6 is characterized in that, described filter regulator circuit comprises the first electric capacity, the second electric capacity, resistance and diode;
Wherein, described the first electric capacity is connected with diodes in parallel, is connected with the first Capacitance parallel connection after described the second electric capacity is connected with resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220473911 CN202840870U (en) | 2012-09-17 | 2012-09-17 | Thermal immersion heating system for stator winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220473911 CN202840870U (en) | 2012-09-17 | 2012-09-17 | Thermal immersion heating system for stator winding |
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| Publication Number | Publication Date |
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| CN202840870U true CN202840870U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220473911 Expired - Fee Related CN202840870U (en) | 2012-09-17 | 2012-09-17 | Thermal immersion heating system for stator winding |
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| CN (1) | CN202840870U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| 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 |
-
2012
- 2012-09-17 CN CN 201220473911 patent/CN202840870U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| CN102868264B (en) * | 2012-09-17 | 2015-12-16 | 无锡航天万源新大力电机有限公司 | Stator winding is heat sink leaching heating system and technique |
| 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 |
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Free format text: FORMER OWNER: BEIJING WANYUAN INDUSTRY CO., LTD. Effective date: 20130509 |
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Effective date of registration: 20130509 Address after: 214174 Jiangsu city in Wuxi Province Economic Development Zone Huishan Wind Power Industrial Park Road Wuxi Wanyuan new wind Motor Co. Ltd. vigorously Patentee after: Wuxi Aerospace Wanyuan Xindali Motor Co.,Ltd. Address before: 214174 Jiangsu city in Wuxi Province Economic Development Zone Huishan Wind Power Industrial Park Road Wuxi Wanyuan new wind Motor Co. Ltd. vigorously Patentee before: Wuxi Aerospace Wanyuan Xindali Motor Co.,Ltd. Patentee before: Beijing Wanyuan Industry Co.,Ltd. |
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Granted publication date: 20130327 Termination date: 20180917 |