CN109039095A - Single phase ac regulated power supply - Google Patents
Single phase ac regulated power supply Download PDFInfo
- Publication number
- CN109039095A CN109039095A CN201810786569.3A CN201810786569A CN109039095A CN 109039095 A CN109039095 A CN 109039095A CN 201810786569 A CN201810786569 A CN 201810786569A CN 109039095 A CN109039095 A CN 109039095A
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- China
- Prior art keywords
- circuit
- switching tube
- voltage
- output
- filter circuit
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- 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.)
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Classifications
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- 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
- H02M5/4585—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 having a rectifier with controlled elements
Abstract
The present invention provides a kind of single phase ac regulated power supplies, including powering on buffer circuit, input filter circuit, pfc circuit, energy storage filter circuit, inverter circuit, output LC filter circuit and main program control circuit, powering on buffer circuit one end is input ac voltage, powers on buffer circuit other end connection input filter circuit；Filter circuit connects pfc circuit；Pfc circuit and inverter circuit share a pair of switches pipe；One end of inverter circuit connection output LC filter circuit；The other end for exporting LC filter circuit is output AC voltage；The alternation voltage of one pulsation of energy storage filter circuit access；Input ac voltage and output AC voltage share an alternating current line of force, realize input voltage and output voltage Phase synchronization, reduce the noise jamming in circuit.The present invention has the function of input and output over-voltage, under-voltage, overcurrent and overheat protector；The present invention can reduce small product size, reduce the usage amount of semiconductor devices.
Description
Technical field
The present invention relates to a kind of power circuits, and in particular, to a kind of single phase ac regulated power supply.
Background technique
The fluctuation of power grid and the noise hazard contained the functional reliability of electrical equipment, in particular with housed device
Constantly intelligent, miniaturization, so that equipment increasingly sensitization.Thus, housed device using when remained further need for stablize and it is noisy
The small supply voltage of acoustic jamming.Conventional AC regulated power supply mostly uses the on-position of adjustment auto-transformer a certain defeated to realize
The stabilization of voltage out, auto-transformer low efficiency itself, volume is big, at high cost, limits its use scope.The need of green energy conservation
Ask and power electronic technique pushed to continue to develop, many novel voltage stabilizing power supplys come into being, be but still difficult to get rid of mostly output every
From transformer；If using conventional semiconductors technical solution, because input power cord and output power line can not be total to " ground ", semiconductor
The noise of generation will be all coupled to electrical equipment, this will lead to part sensitive equipment can not normal use.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of single phase ac regulated power supplies.
A kind of single phase ac regulated power supply provided according to the present invention, including power on buffer circuit, input filter circuit,
Pfc circuit, energy storage filter circuit, inverter circuit, output LC filter circuit and main program control circuit, in which:
The connection of main program control circuit powers on buffer circuit, input filter circuit, pfc circuit, energy storage filter circuit, inversion
Circuit and output LC filter circuit；
The described buffer circuit one end that powers on is input ac voltage, powers on buffer circuit other end connection input filter circuit
Input terminal；
Filter circuit connects pfc circuit；Pfc circuit and inverter circuit share a pair of switches pipe；The inverter circuit connection
Export one end of LC filter circuit；The other end for exporting LC filter circuit is output AC voltage；
The alternation voltage of one pulsation of energy storage filter circuit access, becomes DC voltage after filtering；
The input ac voltage and output AC voltage share an alternating current line of force.
Preferably, the buffer circuit that powers on includes thermistor R1, one end access input AC electricity of thermistor R1
The other end of the first input end of pressure, thermistor R1 connects input filter circuit；The both ends of thermistor R1 are provided with switch
K1。
Preferably, the input filter circuit is capacitor C1:
The one end capacitor C1 connects the other end of thermistor R1, and the capacitor C1 other end connects the alternating current line of force；
Preferably, the pfc circuit includes boost inductance L1, switching tube VT1, switching tube VT2, switching tube VT3 and opens
Close pipe VT4, in which:
The other end of the points of common connection of one end connection switch pipe VT1, VT2 of inductance L1, inductance L1 connects input filter
Capacitor C1；
Switching tube VT1 connects the anode of DC voltage with the collector of switching tube VT3；
The other end of the emitter connection inductance L1 of switching tube VT1 and the collector of switching tube VT2；
The collector of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3；
The emitter of switching tube VT2 and switching tube VT4 ground connection.
Preferably, the inverter circuit includes switching tube VT3, switching tube VT4, switching tube VT5 and switching tube VT6,
In:
Switching tube VT3 connects the anode of DC voltage with the collector of switching tube VT5；
The collector of the emitter connection switch pipe VT6 of switching tube VT5；
The collector of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3；
The emitter of switching tube VT6 and switching tube VT4 ground connection.
Preferably, the output LC filter circuit includes capacitor C2 and inductance L2, in which:
The emitter of one end connection switch pipe VT5 of inductance L2, the of the other end connection output AC voltage of inductance L2
One output end；
The one end capacitor C2 connects the first output end of output AC voltage, and the capacitor C1 other end connects the AC power
Line.
Preferably, the energy storage filter circuit includes energy storage filter capacitor CD1 and resistance R2, in which: the energy storage filtering
The one end capacitor CD1 connects DC voltage electrode, energy storage filter capacitor CD1 other end ground connection；The resistance R2 and energy storage filtered electrical
It is in parallel to hold CD1.
Preferably, the main program control circuit powers on buffer circuit, input filter circuit, PFC electricity using PWM wave control
Road, energy storage filter circuit, inverter circuit and output LC filter circuit.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention provides one kind and is able to achieve Width funtion input, high-accuracy voltage output, high input power factor and energy
The PWM driving alternating current steady voltage plug of power grid can be fed back to；There is input and output over-voltage, under-voltage, overcurrent and overheat protector function simultaneously
Energy；
2, output AC voltage of the invention is not necessarily to use transformer isolation, and inputs, the shared friendship of output AC voltage
The galvanic electricity line of force can either realize input voltage and output voltage Phase synchronization, and the noise that can be generated for semiconductor devices provides
The circuit on power grid ground is flowed back to, input is realized and exports altogether " ground ", reduces the noise jamming in circuit, family and office etc. can be met
The use of sensitive equipment；
3, the present invention can reduce small product size, reduce the usage amount of semiconductor devices.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the system block diagram of single phase ac regulated power supply；
Fig. 2 is the circuit diagram of single phase ac regulated power supply.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As depicted in figs. 1 and 2, a kind of single phase ac voltage regulator circuit provided according to the present invention, including power on buffer circuit,
Input voltage and input current detection circuit, input filter circuit, pfc circuit, energy storage filter circuit, DC voltage sample circuit, inversion
Circuit, LC filter circuit, output voltage/electric current detection circuit.Wherein pfc circuit and inverter circuit share a pair of switches pipe VT3,
VT4, and input voltage and output voltage share an ACN line.
In figure, ACIN is ac voltage input, and is provided with and powers on buffer circuit, alternating voltage sampling circuit and electricity
Flow sample circuit；The buffer circuit that powers on includes thermistor R1, and ac voltage input is accessed in one end of thermistor R1
ACL1 line, the other end of thermistor R1 connects input filter circuit；The both ends of thermistor R1 are provided with switch K1；It is described
Input filter circuit is capacitor C1, and the one end capacitor C1 connects the other end of thermistor R1, and the capacitor C1 other end connects the ACN
Line；Alternating voltage sampling circuit V1 and current sampling circuit I 1 acquires the voltage signal and electric current of ac voltage input respectively
Signal；After powering on, alternating voltage powers on buffering by thermistor R1 current limliting, realization.
The pfc circuit includes boost inductance L1, switching tube VT1, switching tube VT2, switching tube VT3 and switching tube VT4,
Wherein: the other end of the points of common connection of one end connection switch pipe VT1, VT2 of inductance L1, inductance L1 connects input filter capacitor
C1；Switching tube VT1 connects the anode of DC voltage with the collector of switching tube VT3；The emitter of switching tube VT1 connects inductance L1
The other end and switching tube VT2 collector；The current collection of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3
Pole；The emitter of switching tube VT2 and switching tube VT4 ground connection.Alternating voltage flows through switching tube VT1, switching tube VT2, switching tube VT3
And the body diode in switching tube VT4 charges to energy storage filter capacitor CD1, when DC voltage sample circuit V2 detects energy storage
When filter capacitor CD1 both end voltage is higher than some setting value, sending order by main program control circuit keeps switch K1 closure short
Road, and be kept closed it is constant, thus thermistor R1 short circuit.Hereafter, main program control circuit is adopted according to alternating voltage
The collected signal magnitude value of sample circuit V1, current sampling circuit I 1, DC voltage sample circuit V2 and phase send PWM wave
Shape control switch pipe VT1, switching tube VT2, switching tube VT3 and switching tube VT4 opening and closing, and reaches raising input power
Factor and the purpose for increasing busbar voltage VCC, make the voltage value at the both ends energy storage filter capacitor CD1 rise to setting value.Because in real time
Current waveform is monitored, the conducting of control switch pipe VT1, switching tube VT2, switching tube VT3 and switching tube VT4 can be passed through
Input power factor is improved to close to 1 with shutdown.
The inverter circuit includes switching tube VT3, switching tube VT4, switching tube VT5 and switching tube VT6, in which: switch
Pipe VT3 connects the anode of DC voltage with the collector of switching tube VT5；The collection of the emitter connection switch pipe VT6 of switching tube VT5
Electrode；The collector of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3；Switching tube VT6 and switching tube VT4
Emitter ground connection.After energy storage filter capacitor CD1 both end voltage is stablized, PWM wave is exported by main program control circuit, makes its drive
Switching tube VT3, switching tube VT4, switching tube VT5 and the switching tube VT6 of dynamic inverter circuit execute inversion output, output voltage warp
Stable alternating voltage ACOUT is formed after crossing inductance L2, the capacitor C2 of LC filter circuit.When the both ends energy storage filter capacitor CD1 electricity
When pressing through high, energy feedback can be realized to electricity by control switch pipe VT1, switching tube VT2, switching tube VT3 and switching tube VT4
Net realizes energy conservation.
The collector that pfc circuit and inversion common switch pipe VT3 and switching tube VT4, ACN line common point are switching tube VT4.
Its key controlled is to keep the driving frequency of switching tube VT3 and switching tube VT4 consistent with network voltage frequency；Switching tube VT1,
The driving frequency of switching tube VT2, switching tube VT5 and switching tube VT6 are adjusted according to the quality of input-output wave shape, but frequency
Rate must be consistent.Because sampling to input, output voltage and electric current, sampled value is input in main program control circuit
A/D conversion and calculation process are carried out, realizes closed-loop control, main program control circuit can realize regulated power supply by sending PWM wave
Output AC voltage and input ac voltage same-phase.
Major loop and main program control circuit are electrically connected, and major loop has high current to pass through, and main program control circuit is responsible for
Operation and signal processing, no high current flow through.In voltage-stabilized power supply circuit, each voltage, current sample are designed with PI closed loop control
System carries out A/D conversion to sampled signal by main program control circuit and implements operation control to circuit.Sample circuit is provided with
Threshold values is protected, after being more than protection value, the movement of regulated power supply includes but are not limited to stop alternating voltage output, and system issues
Alarm.When normal work, arbitrary value of the AC-input voltage range between 90VAC to 310VAC, output voltage 220VAC is defeated
Out depending on size of the size of electric current by connect load.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (8)
1. a kind of single phase ac regulated power supply, which is characterized in that including power on buffer circuit, input filter circuit, pfc circuit,
Energy storage filter circuit, inverter circuit, output LC filter circuit and main program control circuit, in which:
The connection of main program control circuit powers on buffer circuit, input filter circuit, pfc circuit, energy storage filter circuit, inverter circuit
And output LC filter circuit；
The described buffer circuit one end that powers on is input ac voltage, powers on buffer circuit other end connection input filter circuit；
The output end of filter circuit connects pfc circuit；Pfc circuit and inverter circuit share a pair of switches pipe；The inverter circuit
One end of connection output LC filter circuit；The other end for exporting LC filter circuit is output AC voltage；
The alternation voltage of one pulsation of energy storage filter circuit access, becomes DC voltage after filtering；
The input ac voltage and output AC voltage share an alternating current line of force.
2. single phase ac regulated power supply according to claim 1, which is characterized in that the buffer circuit that powers on includes temperature-sensitive
The first input end of one end access input ac voltage of resistance R1, thermistor R1, the other end connection of thermistor R1 are defeated
Enter filter circuit；The both ends of thermistor R1 are provided with switch K1.
3. single phase ac regulated power supply according to claim 2, which is characterized in that the input filter circuit is capacitor
C1, the one end capacitor C1 connect the other end of thermistor R1, and the capacitor C1 other end connects the alternating current line of force.
4. single phase ac regulated power supply according to claim 3, which is characterized in that the pfc circuit includes boost inductance
L1, switching tube VT1, switching tube VT2, switching tube VT3 and switching tube VT4, in which:
The other end of the points of common connection of one end connection switch pipe VT1, VT2 of inductance L1, inductance L1 connects input filter capacitor
C1；
Switching tube VT1 connects the anode of DC voltage with the collector of switching tube VT3；
The other end of the emitter connection inductance L1 of switching tube VT1 and the collector of switching tube VT2；
The collector of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3；
The emitter of switching tube VT2 and switching tube VT4 ground connection.
5. single phase ac regulated power supply according to claim 1, which is characterized in that the inverter circuit includes switching tube
VT3, switching tube VT4, switching tube VT5 and switching tube VT6, in which:
Switching tube VT3 connects the anode of DC voltage with the collector of switching tube VT5；
The collector of the emitter connection switch pipe VT6 of switching tube VT5；
The collector of emitter connection the alternating current line of force and switching tube VT4 of switching tube VT3；
The emitter of switching tube VT6 and switching tube VT4 ground connection.
6. single phase ac regulated power supply according to claim 5, which is characterized in that the output LC filter circuit includes electricity
Hold C2 and inductance L2, in which:
The emitter of one end connection switch pipe VT5 of inductance L2, the first of the other end connection output AC voltage of inductance L2 are defeated
Outlet；
The one end capacitor C2 connects the first output end of output AC voltage, and the capacitor C1 other end connects the alternating current line of force.
7. single phase ac regulated power supply according to claim 1, which is characterized in that the energy storage filter circuit includes energy storage
Filter capacitor CD1 and resistance R2, in which: described one end energy storage filter capacitor CD1 connects DC voltage electrode, energy storage filter capacitor
CD1 other end ground connection；The resistance R2 is in parallel with energy storage filter capacitor CD1.
8. single phase ac regulated power supply according to claim 1, which is characterized in that the main program control circuit uses
PWM wave control powers on buffer circuit, input filter circuit, pfc circuit, energy storage filter circuit, inverter circuit and output LC filter
Wave circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786569.3A CN109039095A (en) | 2018-07-17 | 2018-07-17 | Single phase ac regulated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810786569.3A CN109039095A (en) | 2018-07-17 | 2018-07-17 | Single phase ac regulated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109039095A true CN109039095A (en) | 2018-12-18 |
Family
ID=64643638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810786569.3A Pending CN109039095A (en) | 2018-07-17 | 2018-07-17 | Single phase ac regulated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109039095A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020052742A (en) * | 2000-12-26 | 2002-07-04 | 신현준 | Method of bypass without phase-difference for UPS with phase-difference |
| CN102457060A (en) * | 2010-10-26 | 2012-05-16 | 深圳市汇川技术股份有限公司 | Injection molding machine having energy-saving device and inverter |
| CN106655470A (en) * | 2016-12-24 | 2017-05-10 | 漳州科华技术有限责任公司 | Uninterrupted power supply and control method thereof |
| CN207010554U (en) * | 2017-05-25 | 2018-02-13 | 苏州汇川技术有限公司 | A kind of power-on protective circuit and frequency converter |
-
2018
- 2018-07-17 CN CN201810786569.3A patent/CN109039095A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020052742A (en) * | 2000-12-26 | 2002-07-04 | 신현준 | Method of bypass without phase-difference for UPS with phase-difference |
| CN102457060A (en) * | 2010-10-26 | 2012-05-16 | 深圳市汇川技术股份有限公司 | Injection molding machine having energy-saving device and inverter |
| CN106655470A (en) * | 2016-12-24 | 2017-05-10 | 漳州科华技术有限责任公司 | Uninterrupted power supply and control method thereof |
| CN207010554U (en) * | 2017-05-25 | 2018-02-13 | 苏州汇川技术有限公司 | A kind of power-on protective circuit and frequency converter |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |