CN85107044A - The control method of converter - Google Patents
The control method of converter Download PDFInfo
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- CN85107044A CN85107044A CN85107044.2A CN85107044A CN85107044A CN 85107044 A CN85107044 A CN 85107044A CN 85107044 A CN85107044 A CN 85107044A CN 85107044 A CN85107044 A CN 85107044A
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- voltage
- converter
- mentioned
- control method
- power
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Abstract
The converter control method makes dc bus voltage consistent with corresponding utility power voltage after being included in the power supply change of current, and in comparator these two voltages is compared.When these two voltages are identical, detect dc bus voltage to judge and to store the level of utility alternating current source voltage, when converter is worked beginning next time, its output voltage is made correction according to institute's information stored.
Description
The present invention relates to the control method of converter, more specifically related to the automatically calibrating method that the converter output voltage changes owing to the variation of supply voltage.
Applied this converter control method is shown among Fig. 1 at present, wherein label 1 is the utility alternating current source, 2 is the AC power rectifier, 3 is filtering capacitor, 4 is power source inverter, the 5th, as the alternating current machine of load, the 6th, be used for the frequency setting device of converter, 7 is soft starting circuit, and 8 is frequency control circuit, the 9th, be used for the comparator that the output voltage from the converter output voltage detecting circuit of the voltage command signal of soft starting circuit 7 and description is compared, 10 is amplifier, 11 is the converter output voltage controlling circuit, and 12 for being used for the base drive circuit of power source inverter, and 13 is the converter output voltage detecting circuit.
Hereinafter former explanation is shown in the working method of the prior art converter control method of Fig. 1.AC power from utility alternating current stream 1 is converted to DC power supply through power rectifier 2, again through filtering capacitor 3 filtering, and is input in the converter 4.Say that for example power source inverter 4 comprises transistor and other element, and utilize transistorized break-make that added DC power supply is converted to the AC power with variable frequency and variable voltage again, so just can make alternating current machine 5 carry out changed speed operation as load.Be used to make the control circuit of power source inverter 4 work as mentioned below with on-off mode work.The analog frequency command signal that is provided by frequency setting device 6 is input to soft starting circuit 7, and converts two groups of signals there to, and one group of signal is used for the output frequency of control inverter 4, and another group then is used to control its output voltage.The frequency control signal group is added on the base drive circuit 12 through frequency control circuit 8, and encourages the output frequency of this base drive circuit 12 with control power source inverter 4.The voltage control signal group then is input to comparator 9, and compare in this output signal with converter output voltage detecting circuit 13, amplify by amplifier 10 afterwards, then resulting signal is delivered to base drive circuit 12 through output voltage controlling circuit 11, as the output signal of frequency control circuit 8.Start the output voltage of base drive circuit 12 then with control inverter 4.
The structure of the inventer control circuit of above-mentioned prior art according to the closed-loop control effect of its output voltage, only can make owing to the variation of supply voltage and carry out minor variations on its output voltage.But, realize the change of current and output voltage control brought the influence of relatively poor responsiveness to be perfect not to the utmost with this closed-loop structure, make entire circuit complicated simultaneously.
Basic purpose of the present invention provides a kind of above-mentioned defective or not enough converter control method that relates to prior art of avoiding, and the different converter output voltage that makes is controlled the responsiveness that has through improving.
Control method according to the present invention comprises that to make dc bus voltage consistent through power supply change of current utility power voltage, and in this comparator, these two voltages are compared, detect above-mentioned dc bus voltage to differentiate and to store the level of utility alternating current source voltage in the identical moment of these two voltages, what working of converter began next time its output voltage is made correction according to institute's information stored.
Fig. 1 is the control circuit block diagram of the converter control method of realization prior art.
Fig. 2 is then for realizing the control circuit block diagram of a kind of embodiment of converter control according to the present invention.
The present invention will be hereinafter gives more detailed explanation with reference to accompanying drawing with a kind of embodiment wherein.
In Fig. 2, all be marked with identical label with those same sections in being shown in Fig. 1, and label 14 and 15 is represented respectively and is used for comparator and the dc bus voltage testing circuit that the input and output signal with software start-up circuit 7 compares.
Referring to Fig. 2, now the course of work to sort circuit describes, and wherein the course of work of main circuit and prior art is identical, so its narration is omitted.Now, according to the foreign frequency command signal, output from frequency setting device 6 has been added on the soft starting circuit 7, output frequency control signal as soft starting circuit 7 outputs increases gradually, and, be used for the comparator 14 that the input and output signal with soft starting circuit 7 compares and just will store from the bus voltage signal of dc bus voltage testing circuit 15 in this output frequency control signal and the above-mentioned corresponding to moment of foreign frequency command signal.
When producing the next foreign frequency command signal that converter is started by frequency setting device 6, the dc bus voltage of above-mentioned storage just immediately by as the message transmission of supply voltage in voltage control circuit 11.The output signal of output voltage controlling circuit 11 is then proofreaied and correct immediately, makes it consistent with supply voltage with regard to the output voltage of having proofreaied and correct converter like this.
That is above said will compare and store dc bus voltage, its reason is to determine the consistent supply voltage constantly of frequency after alternating current machine quickens immediately, because when alternating current machine is in feedback (regeneration) state, its feedback energy will be feedback to converter, this will make dc bus voltage rising beyond supply voltage, thereby it is impossible that the real supply voltage of judgement is become.Therefore desire realizes that this judgement just should be as much as possible be in the moment of the similar electric power rotary state of the condition of starting at motor and carries out.
Some superiority that characteristic feature of an invention by mentioned earlier provides will be described below.When starting, only need once proofread and correct and to realize stable starting operation revolution.Therefore, even supply voltage has this rough sledding of rapid variation to occur in the ofer short duration time, still can guarantee to connect with the safety of power supply, be to have adopted 200 volts and 220 volts for example in Japan, or the different electrical power voltage of 400 volts and 440 volts, because the operation of alternating current machine is to start under to the judgement of supply voltage difference and the condition of proofreading and correct automatically, works normally so can guarantee motor safety.
Errata
Claims (3)
1, be used to make the converter control method of alternating current machine work, its structure comprises that the alternating voltage that can make power supply is converted to the power rectifier of direct voltage, can make above-mentioned direct voltage be converted to the power source inverter of alternating voltage with variable frequency and variable voltage, the output frequency that also comprises above-mentioned power source inverter increases also consistent along with the increase of foreign frequency command signal, and with the converter control method of this structure according to the foreign frequency command signal, can detect the dc bus voltage of above-mentioned converter, the alternating voltage of above-mentioned converter primary power is judged and stored to the as above detected dc bus voltage of basis simultaneously, and control above-mentioned converter with when it starts next time, the output voltage of revising above-mentioned converter automatically makes its alternating voltage with power supply consistent.
2, the converter control method that limits as claim 1, wherein said dc bus voltage are to export according to the direct voltage of above-mentioned power rectifier to be detected.
3, the converter control method that limits as claim 1, wherein said AC power can be 200 volts, 220 volts or 400 volts, 440 volts different alternating voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107044 CN1010730B (en) | 1985-09-25 | 1985-09-25 | The control method of interchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107044 CN1010730B (en) | 1985-09-25 | 1985-09-25 | The control method of interchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107044A true CN85107044A (en) | 1987-04-08 |
| CN1010730B CN1010730B (en) | 1990-12-05 |
Family
ID=4795417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107044 Expired CN1010730B (en) | 1985-09-25 | 1985-09-25 | The control method of interchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010730B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438290C (en) * | 2004-07-01 | 2008-11-26 | 株式会社村田制作所 | Dc-dc converter and converter device |
| CN101359874B (en) * | 2007-08-03 | 2013-05-29 | 塞米克朗电子有限及两合公司 | Driver switch for an inverter with intermediate circuit |
-
1985
- 1985-09-25 CN CN 85107044 patent/CN1010730B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438290C (en) * | 2004-07-01 | 2008-11-26 | 株式会社村田制作所 | Dc-dc converter and converter device |
| CN101359874B (en) * | 2007-08-03 | 2013-05-29 | 塞米克朗电子有限及两合公司 | Driver switch for an inverter with intermediate circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1010730B (en) | 1990-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| C14 | Grant of patent or utility model | ||
| CI01 | Publication of corrected invention patent application |
Correction item: Denomination of Invention Correct: Convertor...... False: Exchanger...... Number: 49 Page: 71 Volume: 6 |
|
| CI03 | Correction of invention patent |
Correction item: Denomination of Invention Correct: Convertor...... False: Exchanger...... Page: Shou |
|
| ERR | Gazette correction |
Free format text: CORRECT: INVENTION NAME TO PLANT; FROM: SWITCH TO: CONVERTER |
|
| C19 | Lapse of patent right due to non-payment of the annual fee |