CN110572083A - Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque - Google Patents
Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque Download PDFInfo
- Publication number
- CN110572083A CN110572083A CN201910730542.7A CN201910730542A CN110572083A CN 110572083 A CN110572083 A CN 110572083A CN 201910730542 A CN201910730542 A CN 201910730542A CN 110572083 A CN110572083 A CN 110572083A
- Authority
- CN
- China
- Prior art keywords
- motor
- torque
- clutch
- induction heating
- electromagnetic torque
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
- H02P1/56—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors simultaneously
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
Abstract
The invention relates to the technical field of superconducting induction heating devices, and discloses an electric transmission control method of a superconducting induction heating device for realizing peak electromagnetic torque, which specifically comprises the following steps of S1, combining a clutch, selecting a frequency converter of 630kW below 100rpm, and starting the frequency converter; s2, starting the main asynchronous motor and the auxiliary asynchronous motor simultaneously, wherein the auxiliary motor is disengaged by the clutch above 100rpm, and the main motor provides 9000Nm torque below 100 rpm; s3, rotating the loaded ingot blank and checking whether the rotating speed reaches 100 r/min; and S4, separating the clutch to ensure that the clutch reaches the rated rotating speed. According to the electric transmission control method of the superconducting induction heating device for realizing the peak electromagnetic torque, the auxiliary motor and the main motor work together, the main motor runs at a rated speed and does not need to be overloaded, the auxiliary motor is responsible for providing large starting torque, starting obstacles caused by the fact that the peak value of load electromagnetic torque exceeds the torque overload capacity of the driving motor are prevented, and the problem of the peak electromagnetic torque is effectively solved.
Description
Technical Field
the invention relates to the technical field of superconducting induction heating devices, in particular to an electric transmission control method of a superconducting induction heating device for realizing peak electromagnetic torque.
Background
the electric transmission means that electric energy is converted into mechanical energy through a motor to drive various production machines, transportation vehicles and articles needing to move in life, in actual life, the peak value of load electromagnetic torque of a large-diameter aluminum ingot exceeds the torque overload capacity of a driving motor, which is a new problem in research and development of a superconducting direct current induction heater, and calculation shows that for an aluminum ingot with the diameter of 446mm, when a working magnetic field is more than 0.5T, a peak value point of the load electromagnetic torque appears when the aluminum ingot is started at a low rotating speed of about 20r/min, and the peak value point is about 3.6 times of rated load electromagnetic torque.
The peak point of the load electromagnetic torque is a great challenge for the design of a device driving system, the output torque overload capacity of a driving motor is usually only 2 times of the rated torque of the driving motor at most and cannot meet the design requirement of a megawatt superconducting direct current induction heater, according to the conventional motor model selection method and principle, the rated power of the motor is more than 3.6 times of the load power, for industrial grade superconducting induction heaters (which typically have heating powers above 300 kW), the drive motor and frequency converter power needs to be greater than 1MW, which increases the cost of the drive motor, frequency converter and drive system mechanical components, in the application field of the high-temperature superconducting induction heating device, the peak value of the load electromagnetic torque exceeds the torque overload capacity of the driving motor, therefore, the starting obstacle is caused, and therefore an electric transmission control method of the superconducting induction heating device for realizing the peak electromagnetic torque is provided.
Disclosure of Invention
The invention provides an electric transmission control method of a superconducting induction heating device for realizing peak electromagnetic torque, which has the advantages of realizing the peak electromagnetic torque, along with simple and reliable method and low cost, and solves the problems in the background art.
In order to achieve the aim, the invention provides the following technical scheme for realizing the electric transmission control method of the superconducting induction heating device for realizing the peak electromagnetic torque, which specifically comprises the following steps:
s1, combining the clutch, selecting a frequency converter of 630kW below 100rpm, and starting the frequency converter;
s2, starting the main asynchronous motor and the auxiliary asynchronous motor simultaneously, disengaging the auxiliary motor above 100rpm through a clutch, providing 9000Nm torque by the main motor below 100rpm, and providing 16000Nm torque by the auxiliary motor through a reduction gearbox clutch;
S3, rotating the loaded ingot blank and checking whether the rotating speed reaches 100 r/min;
And S4, separating the clutch to ensure that the clutch reaches the rated rotating speed.
Optionally, the main motor runs in a rated mode, overload is not needed, and a certain margin is considered, so that the selected motor is 560kW, for an industrial superconducting induction heater, the heating power is usually above 300kW, and when a main motor and an auxiliary motor are adopted for electric transmission, the power of a driving motor and the power of a frequency converter are both greater than 1 MW.
Optionally, the auxiliary motor is responsible for providing a large starting torque, and the motor is selected to be a 185kW motor, and the frequency converter is 215 kW.
optionally, if the rotating speed does not reach 100r/min, the rotating speed needs to be adjusted again, and if the rotating speed reaches 100r/min, the clutch is disengaged.
The invention provides an electric transmission control method of a superconducting induction heating device for realizing peak electromagnetic torque, which has the following beneficial effects:
1. according to the electric transmission control method of the superconducting induction heating device for realizing the peak electromagnetic torque, the auxiliary motor and the main motor work together, the main motor runs at a rated speed and does not need to be overloaded, the auxiliary motor is responsible for providing large starting torque, starting obstacles caused by the fact that the peak value of load electromagnetic torque exceeds the torque overload capacity of the driving motor are prevented, and the problem of the peak electromagnetic torque is effectively solved.
2. according to the electric transmission control method for the superconducting induction heating device for realizing the peak electromagnetic torque, a main motor and auxiliary motor electric transmission method is adopted, so that the operation steps of increasing the cost of a driving motor, a frequency converter and a driving system mechanical part when the power of the driving motor and the frequency converter is more than 1MW are avoided, and the production cost is reduced; when the rpm is more than 100, the auxiliary motor is disengaged through the clutch, when the rpm is less than 100, 9000Nm of torque is provided by the main motor, and 16000Nm of torque is provided by the auxiliary motor through the speed reduction box clutch.
drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a schematic diagram of the working principle of the present invention;
fig. 3 is a schematic diagram of the process of the load electromagnetic torque and the load power changing with the rotating speed.
Detailed Description
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an electric transmission control method for a superconducting induction heating device for realizing a peak electromagnetic torque includes the following steps:
S1, combining the clutch, selecting a frequency converter of 630kW below 100rpm, and starting the frequency converter;
S2, a main asynchronous motor and an auxiliary asynchronous motor are started simultaneously, for an aluminum ingot with the diameter of 446mm, the electric transmission method of the main and auxiliary motors is provided, the auxiliary motor and the main motor work together, the main motor runs in a rated mode and does not need to be overloaded, the auxiliary motor is responsible for providing large starting torque, the problem that the peak value of load electromagnetic torque exceeds the torque overload capacity of a driving motor to cause starting obstacle is prevented, the problem of peak electromagnetic torque is effectively solved, the auxiliary motor above 100rpm is disengaged through a clutch, the main motor provides 9000Nm torque below 100rpm, the auxiliary motor provides 16000Nm torque through a reduction box clutch, and in the application field of the high-temperature superconducting induction heating device, the problem that the peak value of load electromagnetic torque exceeds the torque overload capacity of the driving motor to cause air-entraining starting obstacle can be effectively avoided;
S3, rotating the loaded ingot blank and checking whether the rotating speed reaches 100 r/min;
And S4, separating the clutch to ensure that the clutch reaches the rated rotating speed.
The method is characterized in that a main motor runs in a rated mode, overload is not needed, certain redundancy is considered, the selected motor is 560kW, the heating power of an industrial superconducting induction heater is generally more than 300kW, a main motor and auxiliary motor electric transmission method is adopted, when the power of a driving motor and the power of a frequency converter are both more than 1MW, the operation steps of increasing the cost of the driving motor, the frequency converter and mechanical parts of a driving system are avoided, the production cost is reduced, the method has the effects of simplicity in operation, reliability and low cost, and is suitable for large-scale popularization and application.
the auxiliary motor is responsible for providing large starting torque, the motor is 185kW, and the frequency converter is 215 kW.
And if the rotating speed does not reach 100r/min, the rotating speed needs to be adjusted again, and if the rotating speed reaches 100r/min, the clutch is separated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. an electric transmission control method of a superconducting induction heating device for realizing peak electromagnetic torque is characterized by comprising the following steps:
S1, combining the clutch, selecting a frequency converter of 630kW below 100rpm, and starting the frequency converter;
s2, starting the main asynchronous motor and the auxiliary asynchronous motor simultaneously, disengaging the auxiliary motor above 100rpm through a clutch, providing 9000Nm torque by the main motor below 100rpm, and providing 16000Nm torque by the auxiliary motor through a reduction gearbox clutch;
S3, rotating the loaded ingot blank and checking whether the rotating speed reaches 100 r/min;
And S4, separating the clutch to ensure that the clutch reaches the rated rotating speed.
2. the method as claimed in claim 1, wherein the main motor is rated for operation without overload, and the motor is selected to 560kW in consideration of a certain margin.
3. The method as claimed in claim 1, wherein the auxiliary motor is used for providing large starting torque, and the motor is 185kW and the frequency converter is 215 kW.
4. The method for controlling the electric transmission of the superconducting induction heating device for realizing the peak electromagnetic torque according to claim 1, wherein when the rotating speed does not reach 100r/min, the rotating speed needs to be adjusted again, and when the rotating speed reaches 100r/min, the clutch is disengaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730542.7A CN110572083A (en) | 2019-08-08 | 2019-08-08 | Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730542.7A CN110572083A (en) | 2019-08-08 | 2019-08-08 | Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110572083A true CN110572083A (en) | 2019-12-13 |
Family
ID=68774917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910730542.7A Pending CN110572083A (en) | 2019-08-08 | 2019-08-08 | Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110572083A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916055A (en) * | 2014-02-18 | 2014-07-09 | 上海超导科技股份有限公司 | Superconductivity direct-current induction heating motor starting device based on reduction gearbox and method thereof |
-
2019
- 2019-08-08 CN CN201910730542.7A patent/CN110572083A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916055A (en) * | 2014-02-18 | 2014-07-09 | 上海超导科技股份有限公司 | Superconductivity direct-current induction heating motor starting device based on reduction gearbox and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101808871A (en) | A power apparatus for oil-electricity hybrid vehicle and the operation control method thereof | |
| Huang et al. | Electrical two-speed propulsion by motor winding switching and its control strategies for electric vehicles | |
| CA2683339A1 (en) | Method and system for improving pump efficiency and productivity under power disturbance conditions | |
| US20110181222A1 (en) | Motor control system and method | |
| CN101505128B (en) | Shift control method for multi-stage motor | |
| JP3227398U (en) | Variable power motor | |
| Jirasuwankul | Simulation of energy efficiency improvement in induction motor drive by fuzzy logic based temperature compensation | |
| JP2012100478A (en) | Control method of power generation system and controller of the same | |
| CN110572083A (en) | Electric transmission control method for superconducting induction heating device for realizing peak electromagnetic torque | |
| Indragandhi et al. | Electric motor drives and their applications with simulation practices | |
| CN204612217U (en) | Air-conditioning system | |
| JP2018170919A (en) | Drive control device for vehicle | |
| Kumar et al. | An industrial survey on electric drives and scope of multilevel inverter based induction motor drives in sugar industry | |
| CN207542797U (en) | 100kW and more than grid-connected Stirling generator set | |
| CN208209843U (en) | A kind of sectional wind electric machine controller | |
| CN202856670U (en) | Double-damping single-resistor triangle connection vibrationless braking frequency-conversion apparatus | |
| CN104654643A (en) | Air conditioning system | |
| CN203352514U (en) | Disc-type coreless permanent magnet synchronous motor controller used for electric car wheel hub | |
| CN103368473A (en) | Disc type iron-core-free permanent magnet synchronous motor controller for electric automobile hub | |
| CN103916055A (en) | Superconductivity direct-current induction heating motor starting device based on reduction gearbox and method thereof | |
| CN114148178B (en) | Control method and system of electric transmission system | |
| CN203747699U (en) | Reduction gearbox-based superconductive direct-current induction heating motor starting device | |
| CN217463181U (en) | Two-gear electric drive system for electric automobile | |
| CN202309587U (en) | Soft start circuit structure in plastic granulation assembling line device | |
| CN110581675A (en) | Intelligent motor drive control device and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |