CN107276424A - A kind of variable-frequency power sources control system - Google Patents
A kind of variable-frequency power sources control system Download PDFInfo
- Publication number
- CN107276424A CN107276424A CN201710548977.0A CN201710548977A CN107276424A CN 107276424 A CN107276424 A CN 107276424A CN 201710548977 A CN201710548977 A CN 201710548977A CN 107276424 A CN107276424 A CN 107276424A
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- China
- Prior art keywords
- circuit
- resistance
- electric capacity
- triode
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of variable-frequency power sources control system, including EMI filter circuit, controller, regulating circuit, power circuit and drive circuit, the controller connects power circuit and drive circuit respectively, power circuit is also connected with drive circuit, drive circuit is also respectively connected with bridge inverter main circuit, bridge inverter main circuit is also respectively connected with regulating circuit and filter circuit, regulating circuit also connects EMI filter circuit by current rectifying and wave filtering circuit, EMI filter circuit connection exchange AC input end, the filter circuit other end is output end.The present invention keeps output waveform undistorted using single-chip microcomputer, various waveforms can be handled, such as square wave PWM, sine wave SPWM, space phasor PWM, particular harmonic eliminate PWM, Hysteresis Current PWM, internal power circuit provides galvanic current source for the modules of system in addition, and stability is high.
Description
Technical field
The present invention relates to a kind of control system, specifically a kind of variable-frequency power sources control system.
Background technology
Variable-frequency power sources is, by AC → DC → AC conversion, to be output as the alternating current in civil power pure sine wave, export
It is adjustable in frequency and voltage certain limit.It is different from the variable-frequency speed-regulating controller for electric machine speed regulation, is also different from common
Alternating current steady voltage plug.The characteristics of preferable AC power is that frequency stabilization, voltage stabilization, internal resistance are pure equal to zero, voltage waveform
Sine wave (undistorted).Variable-frequency power sources is in close proximity to preferable AC power, and therefore, advanced developed country will become more and more
Frequency power is used as standard power supply, to provide most excellent power supply environment for electrical appliance, is easy to objective examination electrical appliance
Technical performance.But, generally use circuit is all analog circuit either by chip and analog circuit group to existing variable-frequency power sources
Into circuit, there is the problem of power output is unstable；Simultaneously for internal zero cross detection circuit, due to transformer and IGBT
(insulated gate bipolar transistor), in switch, High-frequency Interference is larger, easily loses real zero crossing, causes the mistake of driving
Control, so as to damage variable-frequency power sources.In addition, the protection to circuit is insufficient, IGBT damages are easily caused.
The content of the invention
It is an object of the invention to provide a kind of variable-frequency power sources control system, with asking for solving to propose in above-mentioned background technology
Topic.
To achieve the above object, the present invention provides following technical scheme：
A kind of variable-frequency power sources control system, including EMI filter circuit, controller, regulating circuit, power circuit and driving electricity
Road, the controller connects power circuit and drive circuit respectively, and power circuit is also connected with drive circuit, and drive circuit is also distinguished
Bridge inverter main circuit is connected, bridge inverter main circuit is also respectively connected with regulating circuit and filter circuit, and regulating circuit also passes through rectification
Filter circuit connects EMI filter circuit, and EMI filter circuit connection exchanges AC input end, and the filter circuit other end is output
End.
It is used as further scheme of the invention：The power circuit includes rectifier bridge Q, electric capacity C1, resistance R1, biradical pole two
Pole pipe VT1, triode VT2 and transformer T, the rectifier bridge Q pin 1 and rectifier bridge Q pin 3 connect 220V alternating currents two respectively
End, rectifier bridge Q pin 2 connects resistance R1, resistance R6, electric capacity C7 and transformer T primary coils, resistance R1 other ends difference respectively
Connect resistance R2, potentiometer RP, potentiometer RP slide plates, electric capacity C2 and resistance R4, resistance the R4 other end connection double base diode
The base stages of VT1 first, double base diode VT1 emitter stages connect electric capacity C3 and resistance R3, resistance R3 other ends connection current potential respectively
The device RP other ends, the base stages of double base diode VT1 second connect resistance R5 and electric capacity C4 respectively, and the electric capacity C4 other ends connect three poles
Pipe VT2 base stages, triode VT2 colelctor electrodes connect respectively the resistance R6 other ends, the electric capacity C7 other ends, triode VT3 colelctor electrodes and
Triode VT4 base stages, the triode VT4 colelctor electrodes connection transformer T primary coil other ends, triode VT4 emitter stages connect respectively
Triode VT3 base stages, resistance R7 and electric capacity C5 are met, it is another that the rectifier bridge Q pin 4 connects the electric capacity C1 other ends, resistance R2 respectively
One end, the electric capacity C2 other ends, the electric capacity C3 other ends, the resistance R5 other ends, triode VT2 emitter stages, triode VT3 emitter stages,
The resistance R7 other ends and the electric capacity C5 other ends, described transformer T secondary coils one end connect electric capacity C6 and output end vo one respectively
End, transformer T secondary coil T other ends connection diode VD5 positive poles, diode VD5 negative poles connect the electric capacity C6 other ends respectively
With the output end vo other end.
It is used as further scheme of the invention：The controller uses STC32 series monolithics.
It is used as further scheme of the invention：The filter circuit uses single order Butterworth low pass ripple.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention keeps output waveform undistorted using single-chip microcomputer,
Various waveforms can be handled, such as square wave PWM, sine wave SPWM, space phasor PWM, particular harmonic eliminate PWM, Hysteresis Current
PWM etc., in addition internal power circuit provide galvanic current source, stability height for the modules of system.
Brief description of the drawings
Fig. 1 is the theory diagram of variable-frequency power sources control system.
Fig. 2 is the circuit diagram of power circuit in variable-frequency power sources control system.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer in Fig. 1~2, the embodiment of the present invention, a kind of variable-frequency power sources control system, including EMI filter circuit, control
Device, regulating circuit, power circuit and drive circuit, the controller connect power circuit and drive circuit, power circuit respectively
Drive circuit is also connected with, drive circuit is also respectively connected with bridge inverter main circuit, and bridge inverter main circuit is also respectively connected with regulating circuit
And filter circuit, regulating circuit is also by current rectifying and wave filtering circuit connection EMI filter circuit, and EMI filter circuit connection exchange AC is defeated
Enter end, the filter circuit other end is output end.
The power circuit includes rectifier bridge Q, electric capacity C1, resistance R1, double base diode VT1, triode VT2 and transformation
Device T, the rectifier bridge Q pin 1 and rectifier bridge Q pin 3 connect 220V alternating currents two ends respectively, and rectifier bridge Q pin 2 is connected respectively
Resistance R1, resistance R6, electric capacity C7 and transformer T primary coils, the resistance R1 other ends connect resistance R2, potentiometer RP, electricity respectively
Position device RP slide plates, electric capacity C2 and resistance R4, resistance the R4 other end connection double base diode the first base stages of VT1, the biradical pole of pole two
Pipe VT1 emitter stages connect electric capacity C3 and resistance R3, the resistance R3 other ends connection potentiometer RP other ends, double base diode respectively
The base stages of VT1 second connect resistance R5 and electric capacity C4, electric capacity C4 other end connecting triode VT2 base stages, triode VT2 current collections respectively
Pole connects the resistance R6 other ends, the electric capacity C7 other ends, triode VT3 colelctor electrodes and triode VT4 base stages, triode VT4 respectively
Colelctor electrode connect the transformer T primary coil other ends, triode VT4 emitter stages connect respectively triode VT3 base stages, resistance R7 and
Electric capacity C5, the rectifier bridge Q pin 4 connects the electric capacity C1 other ends, the resistance R2 other ends, the electric capacity C2 other ends, electric capacity C3 respectively
The other end, the resistance R5 other ends, triode VT2 emitter stages, triode VT3 emitter stages, the resistance R7 other ends and electric capacity C5 are another
End, described transformer T secondary coils one end connects electric capacity C6 and output end vo one end, the transformer T secondary coil T other ends respectively
Diode VD5 positive poles are connected, diode VD5 negative poles connect the electric capacity C6 other ends and the output end vo other end respectively.
VT1 is switching tube；VT2, VT3 manage to promote；VT4 is emitter follower, oscillating circuit be by VT1, VT6, C2,
The astatic multivibrator of the compositions such as C3, R3, R4, VT2, VT3 constitute emitter-base bandgap grading coupled differential amplifier as error and amplify use.
VT2 from the flip-flop transition by the end of conducting by VT1 is determined to the size of C3 charging currents, it is by VT1 electric current bigger, then
VT2 deadline is longer, similarly, and VT3 is from the flip-flop transition by the end of conducting by VT4 determines to C5 charging currents
It is fixed.VT4 electric current is bigger, and VT3 deadlines are shorter, when output end vo voltage declines because of certain reason, difference amplifier
VT2 pipe collectors electric current reduce, the increase of the collector currents of VT3 pipes makes VT4 ON time shorten, deadline lengthening,
Cause that VT4 ON time is elongated, deadline shortens, and output end vo voltage is gone up, and maintains output end vo voltage
Stabilization.
The controller uses STC32 series monolithics.
The filter circuit uses single order Butterworth low pass ripple.
The present invention exchanges AC input after EMI line filters, then can be straight after single-phase bridge rectification and big capacitor filter
Flow and galvanic current pressure is obtained on bus, the DC voltage is under the control on voltage tunable road, by bridge inverter main circuit
After inversion, the exportable SPWM signals sent by drive circuit, in the single order Butterworth low pass ripple by one-level low capacity
Afterwards, you can obtain preferable sinewave output voltage signal in output end.
In summary, the present invention keeps output waveform undistorted using single-chip microcomputer, can handle various waveforms, such as square wave
PWM, sine wave SPWM, space phasor PWM, particular harmonic eliminate PWM, Hysteresis Current PWM etc., in addition internal power circuit
Galvanic current source is provided for the modules of system, stability is high.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the claim involved by limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It may be appreciated other embodiment.
Claims (4)
1. a kind of variable-frequency power sources control system, including EMI filter circuit, controller, regulating circuit, power circuit and driving electricity
Road, it is characterised in that the controller connects power circuit and drive circuit respectively, power circuit is also connected with drive circuit, drives
Dynamic circuit is also respectively connected with bridge inverter main circuit, and bridge inverter main circuit is also respectively connected with regulating circuit and filter circuit, pressure regulation electricity
Road also connects EMI filter circuit, EMI filter circuit connection exchange AC input end, the filter circuit by current rectifying and wave filtering circuit
The other end is output end.
2. variable-frequency power sources control system according to claim 1, it is characterised in that the power circuit include rectifier bridge Q,
Electric capacity C1, resistance R1, double base diode VT1, triode VT2 and transformer T, the rectifier bridge Q pin 1 and rectifier bridge Q draw
Pin 3 connects 220V alternating currents two ends respectively, at the beginning of rectifier bridge Q pin 2 connects resistance R1, resistance R6, electric capacity C7 and transformer T respectively
Level coil, the resistance R1 other ends connect resistance R2, potentiometer RP, potentiometer RP slide plates, electric capacity C2 and resistance R4, resistance R4 respectively
The other end connects double base diode the first base stages of VT1, and double base diode VT1 emitter stages connect electric capacity C3 and resistance respectively
R3, resistance the R3 other end connect the potentiometer RP other ends, and the base stages of double base diode VT1 second connect resistance R5 and electric capacity respectively
C4, electric capacity C4 other end connecting triode VT2 base stages, it is another that triode VT2 colelctor electrodes connect the resistance R6 other ends, electric capacity C7 respectively
One end, triode VT3 colelctor electrodes and triode VT4 base stages, the triode VT4 colelctor electrodes connection transformer T primary coil other ends,
Triode VT4 emitter stages connect triode VT3 base stages, resistance R7 and electric capacity C5 respectively, and the rectifier bridge Q pin 4 is connected respectively
The electric capacity C1 other ends, the resistance R2 other ends, the electric capacity C2 other ends, the electric capacity C3 other ends, the resistance R5 other ends, triode VT2 hairs
Emitter-base bandgap grading, triode VT3 emitter stages, the resistance R7 other ends and the electric capacity C5 other ends, described transformer T secondary coils one end connect respectively
Meet electric capacity C6 and output end vo one end, transformer T secondary coil T other ends connection diode VD5 positive poles, diode VD5 negative poles
The electric capacity C6 other ends and the output end vo other end are connected respectively.
3. variable-frequency power sources control system according to claim 1, it is characterised in that the controller is using STC32 series
Single-chip microcomputer.
4. variable-frequency power sources control system according to claim 1, it is characterised in that the filter circuit uses single order Bart
Butterworth LPF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548977.0A CN107276424A (en) | 2017-07-07 | 2017-07-07 | A kind of variable-frequency power sources control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710548977.0A CN107276424A (en) | 2017-07-07 | 2017-07-07 | A kind of variable-frequency power sources control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107276424A true CN107276424A (en) | 2017-10-20 |
Family
ID=60072457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710548977.0A Withdrawn CN107276424A (en) | 2017-07-07 | 2017-07-07 | A kind of variable-frequency power sources control system |
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| CN (1) | CN107276424A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322060A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of digital program controlled AC power based on PWM controller |
| CN108809110A (en) * | 2018-06-13 | 2018-11-13 | 湖南图强科技开发有限公司 | A kind of power supply system of adjustable frequency |
| CN109361315A (en) * | 2018-11-21 | 2019-02-19 | 西安埃克森电源有限公司 | A kind of input super wide range variable-frequency power sources input method for stabilizing voltage |
| CN110474598A (en) * | 2019-08-22 | 2019-11-19 | 广东职业技术学院 | A kind of SPWM frequency conversion speed-adjusting system and its control method based on FPGA |
-
2017
- 2017-07-07 CN CN201710548977.0A patent/CN107276424A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322060A (en) * | 2017-12-29 | 2018-07-24 | 河南北瑞电子科技有限公司 | A kind of digital program controlled AC power based on PWM controller |
| CN108809110A (en) * | 2018-06-13 | 2018-11-13 | 湖南图强科技开发有限公司 | A kind of power supply system of adjustable frequency |
| CN109361315A (en) * | 2018-11-21 | 2019-02-19 | 西安埃克森电源有限公司 | A kind of input super wide range variable-frequency power sources input method for stabilizing voltage |
| CN110474598A (en) * | 2019-08-22 | 2019-11-19 | 广东职业技术学院 | A kind of SPWM frequency conversion speed-adjusting system and its control method based on FPGA |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171020 |
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| WW01 | Invention patent application withdrawn after publication |