CN106452277A - Converter double-VF-curve control method - Google Patents
Converter double-VF-curve control method Download PDFInfo
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- CN106452277A CN106452277A CN201611157279.XA CN201611157279A CN106452277A CN 106452277 A CN106452277 A CN 106452277A CN 201611157279 A CN201611157279 A CN 201611157279A CN 106452277 A CN106452277 A CN 106452277A
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- Prior art keywords
- converter
- motor
- curve
- state
- output
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Classifications
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- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a converter double-VF-curve control method, characterized by comprising the steps of first, setting two V/F curves in a converter; second, automatically recognizing, by an inner program of the converter, a state in which a motor is currently in; third, recognizing by detecting positive or negative property of output power of the converter, and selecting curve type. V/F curves meeting electric state conditions are set under same load conditions through the method, torque output of the motor in electric movement state can be met, and the requirement of the motor in power generation state can also be met.
Description
Technical field
The present invention is a kind of double VF method for controlling curves of converter, belongs to the double VF curve controlled fields of converter.
Background technology
The v/f control of converter is by the adjustment output voltage of converter and the ratio of output frequency, changes motor and exists
The control mode of mechanical property in speed regulation process, is the most basic control mode of converter, adopts for three phase AC induction machine
When being controlled with converter V/F control mode, traditional way is all first to set a controlling curve, no appoints motor work
In what state, the relation in strict accordance with the curve medium frequency being previously set and voltage is exported a power supply to drive by converter
Dynamic motor operation, but motor, generally with two working conditions, a motoring condition, one is generating state.Such as elevator
The operation of structure, when mechanism rises, motor is in motoring condition, and when mechanism declines, motor is in generating state.Different in both
Under state, the output torque characteristic of motor has very big difference, such as is controlled often being difficult using same V/F curve
Accomplish that the requirement that the torque factor of motor output can be met under motor powered state can meet wanting under electric power generation state again
Ask.Set, under same loading condition, the V/F curve for meeting motoring condition condition, when motor works in generating state, especially
Low-speed stage is in, in abnormal condition, motor operation performance will be significantly greatly increased that the motor feels hot, affect system operation safety
Property, when adjusting parameter make converter do not report to the police normally can run when, under motoring condition, motor cannot be exerted oneself again and can not hung load.Such as
What sets a V/F curve makes which meet the output of the torque under motor powered state and can meet under electric power generation state
Requirement, always perplex field adjustable personnel a difficult problem.
Content of the invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a kind of double VF method for controlling curves of converter and its
Preparation method, be for above the fact that（Single V/F curve need to be in the electricity of the torque output capability of motoring condition and generating state
Accept or reject between machine heating property）, it is proposed here the method for the double V/F curve controlled of a converter can solve this well
Individual problem.
A kind of double VF method for controlling curves of converter, its step includes as follows：
The first step：Two V/F curves are set inside converter first, and one by the requirement for meeting motor powered state
The V/F curve for arranging, one article of the 2nd V/F curve for arranging by the requirement for meeting electric power generation state；
Second：Which kind of working condition is currently at by converter internal processes automatic identification motor, such as identifies motor
A V/F curve of electronic setting then called in motoring condition, such as motor then calls for arranging that generate electricity in generating state
Two V/F curves；
3rd：By detect converter output positive and negative recognizing, output is canonical motor in electric
Dynamic state, converter automatically selects an electronic V/F curve；Output is in generating state for negative then motor, and converter is certainly
Dynamic the 2nd V/F curve of selection generating.
To achieve these goals, the present invention is by the following technical solutions realizing：
The present invention sets the V/F curve for meeting motoring condition condition under same loading condition by this method, can
Meet the requirement that the output of the torque under motor powered state can be met under electric power generation state again.
Specific embodiment
Technological means, creation characteristic, reached purpose and effect for realizing the present invention is easy to understand, with reference to
Specific embodiment, is expanded on further the present invention.
Embodiment
A kind of double VF method for controlling curves of converter, its step includes as follows：
The first step：Two V/F curves are set inside converter first, and one by the requirement for meeting motor powered state
The V/F curve for arranging, one article of the 2nd V/F curve for arranging by the requirement for meeting electric power generation state；
Second：Which kind of working condition is currently at by converter internal processes automatic identification motor, such as identifies motor
A V/F curve of electronic setting then called in motoring condition, such as motor then calls for arranging that generate electricity in generating state
Two V/F curves；
3rd：By detect converter output positive and negative recognizing, output is canonical motor in electric
Dynamic state, converter automatically selects an electronic V/F curve；Output is in generating state for negative then motor, and converter is certainly
Dynamic select the 2nd V/F curve that generates electricity, to some special occasions with also being judged by the given traffic direction of converter
Motor status（As hoisting mechanism rises to motoring condition, generating state is dropped to）
Changed by this kind of method frequently encountered in the past need to be in the torque output capability of motoring condition in single V/F curve
The motor feels hot between performance accepts or rejects with generating state）, the method sets a V/F curve makes which meet motor powered
Torque output under state again can meet the requirement under electric power generation state, it is to avoid arrange under the same loading condition of prior art
Meet well the V/F curve of motoring condition condition, when motor works in generating state, low-speed stage is especially in, motor is transported
In abnormal condition, row performance will be significantly greatly increased that the motor feels hot, affect system operation safety, when adjusting parameter makes converter
Do not report to the police when normally can run, under motoring condition, motor cannot be exerted oneself again and can not hung load
Ultimate principle and principal character and the advantages of the present invention of the present invention is had been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the spirit without departing substantially from the present invention or
In the case of basic feature, the present invention can be realized in other specific forms.Therefore, no matter from the point of view of which point, all should be by
Embodiment regards exemplary as, and be nonrestrictive, the scope of the present invention by claims rather than on state
Bright restriction, it is intended that all changes in the implication and scope of the equivalency of claim that will fall are included in the present invention
Interior.Any labelling in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity
Using description as an entirety, the technical scheme in each embodiment can also form those skilled in the art through appropriately combined
Understandable other embodiment.
Claims (1)
1. the double VF method for controlling curves of a kind of converter, it is characterised in that：Its step includes as follows：
The first step：Two V/F curves are set inside converter first, and one is arranged by the requirement for meeting motor powered state
A V/F curve, one article by meet electric power generation state requirement arrange the 2nd V/F curve；
Second step：Which kind of working condition is currently at by converter internal processes automatic identification motor, such as identifies that motor is in
Motoring condition then calls a V/F curve of electronic setting, and such as motor then calls, in generating state, the 2nd V/F for arranging that generates electricity
Curve；
3rd step：By detect converter output positive and negative recognizing, output is canonical motor in electronic shape
State, converter automatically selects an electronic V/F curve；Output is in generating state for negative then motor, and converter is selected automatically
Select the 2nd V/F curve of generating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611157279.XA CN106452277A (en) | 2016-12-15 | 2016-12-15 | Converter double-VF-curve control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611157279.XA CN106452277A (en) | 2016-12-15 | 2016-12-15 | Converter double-VF-curve control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106452277A true CN106452277A (en) | 2017-02-22 |
Family
ID=58217597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611157279.XA Pending CN106452277A (en) | 2016-12-15 | 2016-12-15 | Converter double-VF-curve control method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106452277A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166293A (en) * | 1998-11-24 | 2000-06-16 | Fuji Electric Co Ltd | Method for driving synchronous motor |
| CN105703687A (en) * | 2014-12-13 | 2016-06-22 | 包米勒公司 | Method for operating a converter and converter |
| CN106105011A (en) * | 2014-06-09 | 2016-11-09 | 株式会社日立产机*** | Power inverter |
-
2016
- 2016-12-15 CN CN201611157279.XA patent/CN106452277A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000166293A (en) * | 1998-11-24 | 2000-06-16 | Fuji Electric Co Ltd | Method for driving synchronous motor |
| CN106105011A (en) * | 2014-06-09 | 2016-11-09 | 株式会社日立产机*** | Power inverter |
| CN105703687A (en) * | 2014-12-13 | 2016-06-22 | 包米勒公司 | Method for operating a converter and converter |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20170222 |