CN1010730B - Control method of the switch - Google Patents
Control method of the switchInfo
- Publication number
- CN1010730B CN1010730B CN 85107044 CN85107044A CN1010730B CN 1010730 B CN1010730 B CN 1010730B CN 85107044 CN85107044 CN 85107044 CN 85107044 A CN85107044 A CN 85107044A CN 1010730 B CN1010730 B CN 1010730B
- Authority
- CN
- China
- Prior art keywords
- voltage
- converter
- circuit
- frequency
- output voltage
- 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.)
- Expired
Links
Landscapes
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
变换器控制方法包括在电源变换后使直流总线电压与相应的公用电源电压相一致，并在比较器中对这两个电压进行比较，在这两个电压相同时检测直流总线电压以判定和贮存公用交流电源电压的电平，根据所贮存的信息在变换器下一次工作开始时对其输出电压做出校正。
The converter control method includes making the DC bus voltage consistent with the corresponding utility power voltage after power conversion, and comparing the two voltages in a comparator, and detecting the DC bus voltage to determine and store when the two voltages are the same The level of the utility AC supply voltage, based on the stored information, is used to correct the output voltage of the converter at the start of the next operation.
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 convertor controls 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 supply convertor, 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 supply convertor, and 13 is the converter output voltage detecting circuit.
Hereinafter former explanation is shown in the working method of the prior art convertor controls 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 supply convertor 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 supply convertor 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 change device 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 supply convertor 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 change device 4.
The structure of the converter 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 conversion 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 convertor controls method that relates to prior art of avoiding, and makes the converter output voltage control the responsiveness that has through improving.
Control method according to the present invention comprises that to make dc bus voltage consistent with utility power voltage behind power supply, and in 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 convertor controls method of realization prior art.
Fig. 2 is then for realizing the control circuit block diagram of a kind of embodiment of convertor controls 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 You Yue that You characteristic feature of an invention mentioned above provides will be described below. Only need once proofread and correct revolution during the Zai starting and can realize stable starting operation. Therefore, even the ofer short duration rapid variation Zhe rough sledding of interior supply voltage You of time of Zai occurs, still can guarantee the security association of Yu power supply, for example Zai Japan has adopted 200 volts and 220 volts, or the different electrical power voltage of 400 volts and 440 volts, the operation of You Yu alternating current generator is Zai to the judgement of supply voltage difference and carries out starting under the condition of automatic calibration, so can guarantee the work that motor safety Zheng is normal.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107044 CN1010730B (en) | 1985-09-25 | 1985-09-25 | Control method of the switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107044 CN1010730B (en) | 1985-09-25 | 1985-09-25 | Control method of the switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107044A CN85107044A (en) | 1987-04-08 |
| CN1010730B true 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 | Control method of the switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010730B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6593668B2 (en) * | 1999-12-30 | 2003-07-15 | Intel Corporation | Method and apparatus for multifrequency power distribution |
| US7199561B2 (en) * | 2004-07-01 | 2007-04-03 | Murata Manufacturing Co., Ltd. | DC-DC converter and converter device |
| DE102007036700A1 (en) * | 2007-08-03 | 2009-02-05 | Semikron Elektronik Gmbh & Co. Kg | Driver circuit for a power converter with DC link |
-
1985
- 1985-09-25 CN CN 85107044 patent/CN1010730B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85107044A (en) | 1987-04-08 |
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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 | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |