CN109412424A - A kind of amplitude, the adjustable high pressure sine-wave power circuit of frequency and implementation method - Google Patents
A kind of amplitude, the adjustable high pressure sine-wave power circuit of frequency and implementation method Download PDFInfo
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- CN109412424A CN109412424A CN201811572616.0A CN201811572616A CN109412424A CN 109412424 A CN109412424 A CN 109412424A CN 201811572616 A CN201811572616 A CN 201811572616A CN 109412424 A CN109412424 A CN 109412424A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 54
- 230000003321 amplification Effects 0.000 claims abstract description 44
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 36
- 238000013519 translation Methods 0.000 claims description 10
- 102000007315 Telomeric Repeat Binding Protein 1 Human genes 0.000 claims description 6
- 108010033711 Telomeric Repeat Binding Protein 1 Proteins 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 18
- 229960001296 zinc oxide Drugs 0.000 abstract description 9
- 239000011787 zinc oxide Substances 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The present invention relates to a kind of amplitude, the adjustable high pressure sine-wave power circuit of frequency and implementation methods, after exchanging AC220V input, pass through AC/DC conversion circuit, power supply is provided for power amplification circuit, primary is connected to after power amplification circuit output, it is exported after being boosted by transformer, output end connects arrester valve piece.Simultaneously from power amplification circuit output end collection voltages, current signal, single-chip microcomputer signal processing circuit is fed back to by acquiring signal processing circuit, through setting signal compared with feedback signal, the sine wave of 0~1V is exported, is connected to power amplification circuit to realize circuit closed-loop control.The power supply is Zinc-Oxide Arrester voltage, current characteristics detection provides high pressure, and power supply amplitude is adjusted to exchange 10kv virtual value from 0V, and effective output is up to 100W, and for output frequency precision whole process up to 0.05%, frequency can be adjusted to 700Hz from 45Hz.
Description
Technical field
The present invention relates to one kind to be used in electric system lightning protection field, is Zinc-Oxide Arrester valve block voltage, current characteristics inspection
It surveys and the adjustable high pressure sine-wave power circuit of amplitude, frequency and implementation method of high pressure is provided.
Background technique
Zinc-Oxide Arrester is widely applied in the power system due to its good nonlinear characteristic.In recent years, oxygen
Change zinc arrester causes the reasons such as dampness to set off an explosion because of its poor sealing in operation, and then causes large area blackout
It happens occasionally.By monitoring on-line with live testing as a result, thereby determining whether the progress DC experiment that has a power failure, further determine that
The defects of Zinc-Oxide Arrester is with the presence or absence of dampness.
But DC experiment is although sensitive effective, but there is also bottleneck, the DC characteristics and AC characteristic of zinc oxide material
Difference, and direct current and voltage's distribiuting situation of the exchange inside arrester are also different, single DC test cannot detect operation
Insulation status under voltage, therefore, carrying out exchange leak-testing to Zinc-Oxide Arrester seems extremely important.
The high-voltage power circuit of exchange is provided for Zinc-Oxide Arrester on the market, since manufacture difficulty is big, frequency is mostly not
It is adjustable, so that alternating-current measurement is comprehensive, accuracy reduces.
Summary of the invention
The urgent need of situation and current electric system lightning protection field in view of the prior art, the present invention provide a kind of width
Degree, the adjustable high pressure sine-wave power circuit of frequency and implementation method, the power circuit provide friendship for Zinc-Oxide Arrester valve block
Galvanic electricity pressure, amplitude, the frequency of alternating voltage are adjustable, so that the alternating-current measurement of arrester is more comprehensively, it is as a result more accurate.
The present invention to achieve the above object, is adopted the technical scheme that: a kind of amplitude, the adjustable high pressure sine wave of frequency
Power circuit, including AC/DC translation circuit, power amplification circuit, transformer, single-chip microcomputer signal processing circuit, it is characterised in that:
It further include acquisition signal processing circuit；The AC/DC translation circuit is connected with power amplification circuit, power amplification circuit respectively with
Single-chip microcomputer signal processing circuit, transformer and acquisition signal processing circuit are connected, and acquire signal processing circuit and single-chip microcomputer signal
Processing circuit connection, transformer secondary output directly export high pressure；
The acquisition signal processing circuit specifically connects are as follows: the one end resistance R4 connects power amplification circuit output end vo and this circuit
The one end switch S1, the resistance R4 other end respectively with the one end resistance R5, the switch S1 other end and transformer TRF1 primary one end phase
Even, the resistance R5 other end is connected with 1 foot of the one end capacitor C4 and potentiometer W1 respectively, and the capacitor C4 other end is connected to the ground, current potential
2 feet of device W1 and 3 feet are connected with one end of 2 feet of amplifier U2A, resistance R6 and resistance R7 respectively after being shorted, and resistance R7 is another
End be connected respectively with diode D2 cathode, the one end resistance R8, the resistance R6 other end respectively with diode D3 anode and amplifier U2B
5 feet be connected, diode D3 cathode is connected with 1 foot of amplifier U2A again after being connected with diode D2 anode, the 3 of amplifier U2A
Foot and 4 feet are connected to the ground, and the resistance R8 other end is connected with 6 feet of the one end resistance R9 and amplifier U2B respectively, the resistance R9 other end
Connect respectively with 1 foot of 7 feet of amplifier U2B, the one end resistance R10 and potentiometer W3, the resistance R10 other end respectively with amplifier
2 feet, the resistance R11 of U3A is connected with one end of capacitor C5, capacitor C5, the resistance R11 other end respectively with 1 foot of amplifier U3A,
3 feet of resistance R12, one end of resistance R13 and potentiometer W3 connect, and 3 feet and 4 feet of amplifier U3 are connected to the ground, and resistance R12 is another
One end output signal Vdis is connected with Vdis in single-chip microcomputer signal processing circuit, and 2 feet of potentiometer W3 and the one end resistance R17 connect
Connect, the resistance R13 other end is connect with 6 feet of the one end capacitor C6, amplifier U3B respectively, the capacitor C6 other end respectively with amplifier
The 1 foot connection of 7 feet, potentiometer W2 of U3B, 3 feet of potentiometer W2 are connected to the ground, 2 feet and power amplification circuit of potentiometer W2
3 feet of middle chip U1 are connected, and 5 feet of amplifier U3B are connected with capacitor C7 and the one end resistance R14 respectively, the capacitor C7 other end and
Ground is connected, and the resistance R14 other end is connected with 6 feet of chip U11 in single-chip microcomputer signal processing circuit, resistance R17 other end difference
Be connected with one end of capacitor C8, resistance R16, resistance R18, resistance R19, the capacitor C8 other end respectively with the one end resistance R15 and change
The depressor TRF1 primary other end is connected, and resistance R15 and the resistance R18 other end are connected to the ground, the resistance R19 other end and amplifier
3 feet of U4A are connected, and 2 feet of another termination potentiometer W4 of resistance R16,1 foot of potentiometer W4 is connected to the ground, 3 feet of potentiometer W4
It is connected with 8 feet of chip U1 in power amplification circuit, 4 feet of amplifier U4A are connected to the ground, 2 feet and potentiometer of amplifier U4A
2 feet of W5 are connected, and 1 foot of potentiometer W5 is connected to the ground, 3 feet of potentiometer W5 by resistance R20 respectively with diode D4 anode,
The one end resistance R21 be connected, diode D4 cathode is connect with 1 foot of amplifier U4A, the resistance R21 other end respectively with resistance R22,
One end of capacitor C9 and 6 feet of amplifier U4B are connected, and resistance R22 and the capacitor C9 other end are connected to the ground, 5 feet of amplifier U4B
It is connected to the ground, 7 feet of amplifier U4B export current monitor signal Idis by resistance R24；
Relay Relay and the one end resistance R23 are connected with+24V in AC/DC translation circuit respectively, the relay Relay other end with
Triode T1 collector is connected, and the resistance R23 other end is connected with triode T1 base stage, and triode T1 emitter is connected to the ground；
Amplifier U2A, amplifier U2B, amplifier U3 A, amplifier U3 B, amplifier U4 A, amplifier U4 B model be
LM358。
A kind of amplitude, the implementation method of the adjustable high pressure sine-wave power circuit of frequency, it is characterised in that: work as exchange
After AC220V input, DC24V and DC ± 48V are converted to by AC/DC translation circuit, DC ± 48V provides for power amplification circuit
Power supply, after DC24V is converted into DC12V using DC/DC, provides power supply, power for amplifier and single-chip microcomputer signal processing circuit
It is connected to primary after amplifying circuit output, is exported after being boosted by transformer, output end connects arrester valve piece, simultaneously
From power amplification circuit output end collection voltages, current signal, fed back at single-chip microcomputer signal by acquiring signal processing circuit
It manages in circuit, through setting signal with feedback signal compared with, single-chip microcomputer signal processing circuit exports 0 by 14 feet of chip U7~
The sine wave of 1V is input in single-chip microcomputer signal processing circuit chip U6 by program assembly and the frequency of needs is arranged, and passed through
The potentiometer W5 for acquiring signal processing circuit adjusts output amplitude gain, and sine wave passes through 1 foot of power amplification circuit chip U1
Afterwards, it is input in the main circuit of power amplification circuit, is exported after being amplified the sine wave signal of input by the circuit, times magnification
Number is 36 times；Power amplification circuit output end to ac signal acquisition and processing, the standard sine wave signal of acquisition passes through
Negative pressure signal is obtained after absolute value amplifying circuit full-wave rectification, using the voltage feedback signal for exporting DC4V after zero comparator
Vdis adjusts Vdis voltage magnitude by adjusting potentiometer W1, and Vdis is input to single-chip microcomputer signal circuit, single-chip microcomputer signal processing
Circuit output Vadj signal and two comparison signals of the Vdis as amplifier U3B, comparison result pass through 7 feet of amplifier U3B
The output state for feeding back to after 3 feet of power amplification circuit chip U1 and then regulating and controlling power amplification circuit forms complete control
Circuit, this AC becomes the signal processing mode that DC, DC become AC ac-dc conversion not to be had so that sampled signal is all low voltage signal
There is the interference of high pressure, keep sampled signal more stable, control closed loop circuit is more reliable.
It, can be with the beneficial effects of the present invention are: the present invention is a kind of amplitude, the adjustable high pressure sine-wave power circuit of frequency
The comprehensive and accuracy of alternating-current measurement is effectively improved, power supply amplitude is adjusted to exchange 10kv(virtual value from 0V), effectively export
Power is up to 100W, and for output frequency precision whole process up to 0.05%, frequency-tuning range is wide, is adjustable to 700Hz, wide model from 45Hz
A variety of testing requirements when alternating-current measurement can be met by enclosing adjusting, and the sine-wave power that can be taken into account a variety of tenterings, determine frequency is that a machine is more
With, it is more convenient effectively to make alternating-current measurement, so that improving electric power system fault checks efficiency and accuracy rate, it is Zinc-Oxide Arrester
It improves and theoretical foundation is provided.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the schematic diagram of circuit of the present invention.
Specific embodiment
As shown in Figure 1 and Figure 2, the adjustable high pressure sine-wave power circuit of a kind of amplitude, frequency, circuit include AC/DC transformation
Circuit, power amplification circuit, transformer, single-chip microcomputer signal processing circuit, it is characterised in that: further include acquisition signal processing electricity
Road.The AC/DC translation circuit is connected with power amplification circuit, power amplification circuit respectively with single-chip microcomputer signal processing circuit,
Transformer and acquisition signal processing circuit are connected, and acquisition signal processing circuit is connect with single-chip microcomputer signal processing circuit, transformer
It is secondary directly to export high pressure.
As depicted in figs. 1 and 2, acquisition signal processing circuit specifically connects are as follows: the one end resistance R4 connects power amplification circuit
One end switch S1 of output end vo and this circuit, the resistance R4 other end respectively with the one end resistance R5, the switch S1 other end and transformation
Device TRF1 primary one end is connected, and the resistance R5 other end is connected with 1 foot of the one end capacitor C4 and potentiometer W1 respectively, and capacitor C4 is another
End is connected to the ground, one end with 2 feet of amplifier U2A, resistance R6 and resistance R7 respectively after 2 feet of potentiometer W1 and 3 feet are shorted
Be connected, the resistance R7 other end is connected with diode D2 cathode, the one end resistance R8 respectively, the resistance R6 other end respectively with diode D3
Anode be connected with 5 feet of amplifier U2B, diode D3 cathode be connected with diode D2 anode after again with the 1 foot phase of amplifier U2A
Even, 3 feet and 4 feet of amplifier U2A are connected to the ground, the resistance R8 other end 6 foot phases with the one end resistance R9 and amplifier U2B respectively
Even, the resistance R9 other end is connect with 1 foot of 7 feet of amplifier U2B, the one end resistance R10 and potentiometer W3 respectively, and resistance R10 is another
One end is connect with one end of 2 feet of amplifier U3A, resistance R11 and capacitor C5 respectively, capacitor C5, the resistance R11 other end respectively with
The 3 feet connection of 1 foot of amplifier U3A, resistance R12, one end of resistance R13 and potentiometer W3,3 feet and 4 feet of amplifier U3 with
Ground is connected, and resistance R12 other end output signal Vdis is connected with Vdis in single-chip microcomputer signal processing circuit, 2 feet of potentiometer W3
It is connect with the one end resistance R17, the resistance R13 other end is connect with 6 feet of the one end capacitor C6, amplifier U3B respectively, and capacitor C6 is another
End is connect with 1 foot of 7 feet of amplifier U3B, potentiometer W2 respectively, and 3 feet of potentiometer W2 are connected to the ground, 2 feet of potentiometer W2
It is connected with 3 feet of chip U1 in power amplification circuit, 5 feet of amplifier U3B are connected with capacitor C7 and the one end resistance R14 respectively,
The capacitor C7 other end is connected to the ground, and the resistance R14 other end is connected with 6 feet of chip U11 in single-chip microcomputer signal processing circuit, resistance
The R17 other end is connected with one end of capacitor C8, resistance R16, resistance R18, resistance R19 respectively, the capacitor C8 other end respectively with electricity
It hinders the one end R15 and the transformer TRF1 primary other end is connected, resistance R15 and the resistance R18 other end are connected to the ground, and resistance R19 is another
One end is connected with 3 feet of amplifier U4A, and 2 feet of another termination potentiometer W4 of resistance R16,1 foot of potentiometer W4 is connected to the ground,
3 feet of potentiometer W4 are connected with 8 feet of chip U1 in power amplification circuit, and 4 feet of amplifier U4A are connected to the ground, amplifier U4A
2 feet be connected with 2 feet of potentiometer W5,1 foot of potentiometer W5 is connected to the ground, 3 feet of potentiometer W5 by resistance R20 respectively with
Diode D4 anode, the one end resistance R21 are connected, and diode D4 cathode is connect with 1 foot of amplifier U4A, the resistance R21 other end point
It is not connected with 6 feet of resistance R22, one end of capacitor C9 and amplifier U4B, resistance R22 and the capacitor C9 other end are connected to the ground, and are put
5 feet of big device U4B are connected to the ground, and 7 feet of amplifier U4B export current monitor signal Idis by resistance R24；
Relay Relay and the one end resistance R23 are connected with+24V in AC/DC translation circuit respectively, the relay Relay other end with
Triode T1 collector is connected, and the resistance R23 other end is connected with triode T1 base stage, and triode T1 emitter is connected to the ground.
Acquire signal processing circuit chip and select comparator LM358, when selection, is considered as its offset voltage, offset voltage compared with
Big chip needs plus is zeroed compensation circuit (having included in this circuit).For compensating and the selection of adjusting potentiometer, due to
It directly affects output voltage precision, therefore need to consider its reliability and stability when design.
In single-chip microcomputer signal processing circuit, 0~1V sine wave is exported by AD9851 chip U7 and controls power amplification circuit,
After sine wave freuqency is arranged by mcu programming, then AD9851 chip U7 control terminal is controlled by C8051F005 chip U6 and is exported,
Sinusoidal amplitude can be by adjusting potentiometer W5.
The Vdis and Vadj in single-chip microcomputer signal processing circuit in acquisition signal processing circuit after comparator by exporting
Voltage, the AD633 chip U1 being sent in power amplifier circuit, the chip receive the width of adjustable output signal after signal
Value, then be input to power amplifying part and amplify signal, and then adjust output voltage amplitude.
In the design of circuit pcb board, primary operating current is larger, therefore main power lines design redundancy should meet level-one drop
Volume reduces line loss.The position close to shell or bottom plate should be contemplated that the heat dissipation of power device simultaneously, heat dissipation effect can be reinforced
Fruit.
The innovation of the power supply is in the processing to acquisition signal that the signal of acquisition is sine wave AC signal, leads to
Loop signals transformation is crossed, AC becomes DC, DC and becomes AC, AC/DC conversion control circuit, and this control mode makes sampled signal all be
Low voltage signal, the not interference of high pressure, keeps sampled signal more stable, and control closed loop circuit is more reliable, whole to improve the present invention
The service life of the power supply.
The present invention acquires signal behavior at primary end, can reduce difficulty in this way and increase power supply reliability, simultaneously
Closed-loop control effect is not influenced again.The sine wave signal of acquisition is transformed into full wave rectified signal by absolute value circuit, then will place
The signal of reason exports after entering comparator by Vadj signal in comparator output DC voltage, with single-chip microcomputer signal processing circuit
Signal, and then the amplitude of power amplification circuit output is controlled, and then constitute complete closed loop.
Circuit main operational principle is as follows:
The sine wave of 0~1V of single-chip microcomputer signal circuit output, the frequency needed by program assembly setting, passes through potentiometer W5 tune
Save output amplitude gain；
Sine wave is input in the main circuit of power amplification circuit after 1 foot of power amplification circuit chip U1, passes through the electricity
Road exports after amplifying the sine wave signal of input, and amplification factor is 36 times；
Power amplification circuit output end to ac signal acquisition and processing, the standard sine wave signal of acquisition passes through absolute value
Negative pressure signal is obtained after amplifying circuit full-wave rectification, using the feedback signal Vdis for exporting DC4V after zero comparator, passes through tune
Nodal potential device W1 adjusts Vdis voltage magnitude, and Vdis is input to single-chip microcomputer signal circuit, the output of single-chip microcomputer signal processing circuit
Vadj signal and two comparison signals of the Vdis as amplifier U3B, comparison result feed back to function by 7 feet of amplifier U3B
The output state for regulating and controlling power amplification circuit after 3 feet of rate amplifying circuit chip U1 in turn, forms complete control loop.
Claims (2)
1. the adjustable high pressure sine-wave power circuit of a kind of amplitude, frequency, including AC/DC translation circuit, power amplification circuit, change
Depressor, single-chip microcomputer signal processing circuit, it is characterised in that: further include acquisition signal processing circuit；The AC/DC translation circuit with
Power amplification circuit is connected, and power amplification circuit is electric with single-chip microcomputer signal processing circuit, transformer and acquisition signal processing respectively
Road is connected, and acquisition signal processing circuit is connect with single-chip microcomputer signal processing circuit, and transformer secondary output directly exports high pressure；
The acquisition signal processing circuit specifically connects are as follows: the one end resistance R4 connects power amplification circuit output end vo and this circuit
The one end switch S1, the resistance R4 other end respectively with the one end resistance R5, the switch S1 other end and transformer TRF1 primary one end phase
Even, the resistance R5 other end is connected with 1 foot of the one end capacitor C4 and potentiometer W1 respectively, and the capacitor C4 other end is connected to the ground, current potential
2 feet of device W1 and 3 feet are connected with one end of 2 feet of amplifier U2A, resistance R6 and resistance R7 respectively after being shorted, and resistance R7 is another
End be connected respectively with diode D2 cathode, the one end resistance R8, the resistance R6 other end respectively with diode D3 anode and amplifier U2B
5 feet be connected, diode D3 cathode is connected with 1 foot of amplifier U2A again after being connected with diode D2 anode, the 3 of amplifier U2A
Foot and 4 feet are connected to the ground, and the resistance R8 other end is connected with 6 feet of the one end resistance R9 and amplifier U2B respectively, the resistance R9 other end
Connect respectively with 1 foot of 7 feet of amplifier U2B, the one end resistance R10 and potentiometer W3, the resistance R10 other end respectively with amplifier
2 feet, the resistance R11 of U3A is connected with one end of capacitor C5, capacitor C5, the resistance R11 other end respectively with 1 foot of amplifier U3A,
3 feet of resistance R12, one end of resistance R13 and potentiometer W3 connect, and 3 feet and 4 feet of amplifier U3 are connected to the ground, and resistance R12 is another
One end output signal Vdis is connected with Vdis in single-chip microcomputer signal processing circuit, and 2 feet of potentiometer W3 and the one end resistance R17 connect
Connect, the resistance R13 other end is connect with 6 feet of the one end capacitor C6, amplifier U3B respectively, the capacitor C6 other end respectively with amplifier
The 1 foot connection of 7 feet, potentiometer W2 of U3B, 3 feet of potentiometer W2 are connected to the ground, 2 feet and power amplification circuit of potentiometer W2
3 feet of middle chip U1 are connected, and 5 feet of amplifier U3B are connected with capacitor C7 and the one end resistance R14 respectively, the capacitor C7 other end and
Ground is connected, and the resistance R14 other end is connected with 6 feet of chip U11 in single-chip microcomputer signal processing circuit, resistance R17 other end difference
Be connected with one end of capacitor C8, resistance R16, resistance R18, resistance R19, the capacitor C8 other end respectively with the one end resistance R15 and change
The depressor TRF1 primary other end is connected, and resistance R15 and the resistance R18 other end are connected to the ground, the resistance R19 other end and amplifier
3 feet of U4A are connected, and 2 feet of another termination potentiometer W4 of resistance R16,1 foot of potentiometer W4 is connected to the ground, 3 feet of potentiometer W4
It is connected with 8 feet of chip U1 in power amplification circuit, 4 feet of amplifier U4A are connected to the ground, 2 feet and potentiometer of amplifier U4A
2 feet of W5 are connected, and 1 foot of potentiometer W5 is connected to the ground, 3 feet of potentiometer W5 by resistance R20 respectively with diode D4 anode,
The one end resistance R21 be connected, diode D4 cathode is connect with 1 foot of amplifier U4A, the resistance R21 other end respectively with resistance R22,
One end of capacitor C9 and 6 feet of amplifier U4B are connected, and resistance R22 and the capacitor C9 other end are connected to the ground, 5 feet of amplifier U4B
It is connected to the ground, 7 feet of amplifier U4B export current monitor signal Idis by resistance R24；
Relay Relay and the one end resistance R23 are connected with+24V in AC/DC translation circuit respectively, the relay Relay other end with
Triode T1 collector is connected, and the resistance R23 other end is connected with triode T1 base stage, and triode T1 emitter is connected to the ground；
Amplifier U2A, amplifier U2B, amplifier U3 A, amplifier U3 B, amplifier U4 A, amplifier U4 B model be
LM358。
2. it is a kind of using amplitude described in claim 1, the implementation method of the adjustable high pressure sine-wave power circuit of frequency, it is special
Sign is: after exchanging AC220V input, being converted to DC24V and DC ± 48V by AC/DC translation circuit, DC ± 48V is power
Amplifying circuit provides power supply, after DC24V is converted into DC12V using DC/DC, mentions for amplifier and single-chip microcomputer signal processing circuit
For power supply, it is connected to primary after power amplification circuit output, is exported after being boosted by transformer, output end connection is lightning-arrest
Device valve block, while from power amplification circuit output end collection voltages, current signal, list is fed back to by acquiring signal processing circuit
In piece machine signal processing circuit, through setting signal compared with feedback signal, single-chip microcomputer signal processing circuit passes through chip U7's
14 feet export the sine wave of 0~1V, are input to what setting in single-chip microcomputer signal processing circuit chip U6 needed by program assembly
Frequency, and output amplitude gain is adjusted by the potentiometer W5 of acquisition signal processing circuit, sine wave passes through power amplification circuit
It after 1 foot of chip U1, is input in the main circuit of power amplification circuit, after being amplified the sine wave signal of input by the circuit
Output, amplification factor are 36 times；Power amplification circuit output end to ac signal acquisition and processing, the standard sine of acquisition
Wave signal obtains negative pressure signal after passing through the full-wave rectification of absolute value amplifying circuit, using the voltage for exporting DC4V after zero comparator
Feedback signal Vdis adjusts Vdis voltage magnitude by adjusting potentiometer W1, and Vdis is input to single-chip microcomputer signal circuit, single-chip microcontroller
Signal processing circuit exports Vadj signal and two comparison signals of the Vdis as amplifier U3B, and comparison result passes through amplifier
7 feet of U3B feed back to the output state for after 3 feet of power amplification circuit chip U1 and then regulating and controlling power amplification circuit, have been formed
Whole control loop, this AC becomes the signal processing mode that DC, DC become AC ac-dc conversion, so that sampled signal is all low-voltage
Signal, the not interference of high pressure, keeps sampled signal more stable, and control closed loop circuit is more reliable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811572616.0A CN109412424B (en) | 2018-12-21 | 2018-12-21 | Amplitude and frequency adjustable high-voltage sine wave power supply circuit and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811572616.0A CN109412424B (en) | 2018-12-21 | 2018-12-21 | Amplitude and frequency adjustable high-voltage sine wave power supply circuit and implementation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109412424A true CN109412424A (en) | 2019-03-01 |
| CN109412424B CN109412424B (en) | 2024-05-10 |
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ID=65460502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811572616.0A Active CN109412424B (en) | 2018-12-21 | 2018-12-21 | Amplitude and frequency adjustable high-voltage sine wave power supply circuit and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109412424B (en) |
Cited By (1)
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| CN117134629A (en) * | 2023-10-26 | 2023-11-28 | 常州同惠电子股份有限公司 | Circuit system for outputting alternating voltage by linear alternating current power supply and working method |
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| CN117134629A (en) * | 2023-10-26 | 2023-11-28 | 常州同惠电子股份有限公司 | Circuit system for outputting alternating voltage by linear alternating current power supply and working method |
| CN117134629B (en) * | 2023-10-26 | 2024-01-30 | 常州同惠电子股份有限公司 | Circuit system for outputting alternating voltage by linear alternating current power supply and working method |
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