CN106712550A - Uninterrupted variable-frequency stabilized-current power supply - Google Patents
Uninterrupted variable-frequency stabilized-current power supply Download PDFInfo
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- CN106712550A CN106712550A CN201610675849.8A CN201610675849A CN106712550A CN 106712550 A CN106712550 A CN 106712550A CN 201610675849 A CN201610675849 A CN 201610675849A CN 106712550 A CN106712550 A CN 106712550A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Inverter Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
In order to overcome defects of a stabilized-current power supply used for ground resistivity measurement in industries such as earthquake observation, earthquake engineering and hydrogeology currently, meet the technical requirement that ground resistivity observation is anti-interference and realize needs of AC/DC comparative observation and joint observation, the invention provides an uninterrupted variable-frequency stabilized-current power supply which is designed by using a switching power supply technology and a variable-frequency inverter technology. According to the power supply, sine-wave low-frequency AC stabilized-current power with frequency and current programmable can be outputted for being used by a ground resistivity observation device, or DC stabilized-current power with current programmable can be outputted for being used by the ground resistivity observation device, and 220V/50Hz AC can be outputted for being used by other power consumption devices. The uninterrupted variable-frequency stabilized-current power supply is mainly composed of a switching stabilized-voltage power circuit, a charging circuit, a variable-frequency stabilized-current inverter circuit, a 220V/50Hz AC inverter circuit, an AC/DC reference signal generation and control circuit, a battery pack and a working power circuit.
Description
Art
The present invention relates to the stabilized current supply of a kind of use switch power technology and frequency conversion inversion transformation technique, especially with both may be used
With output low frequency ac current regulator electricity, DC constant current electricity can be exported again, can also export the uninterrupted change of 220V, 50HZ alternating current
Frequency ac current stabilized power source.
Technical background
At present, the industry such as China's seismological observation, earthquake engineering, hydrogeology, carry out that earth resistivity measurement used is steady
Stream power supply generally uses DC current stabilized power supply.Because direct current Apparent Resistivity Observation system is easily subject to electric railway, work
The influence of industry or other scattered strays streams, antijamming capability is relatively poor；If carrying out ground using variable-frequency ac current stabilized power source
Resistivity observation, due to the observation utilization of AC resistance rate is frequency-selecting transmitting, the AC electrical method technology that frequency-selecting receives, frequency list
One, thus antijamming capability can significantly increase；Additionally due to the influence of earth surface skin effect, exports different frequencies, can
To measure the earth resistivity of different depth, beneficial to the inverting for doing underground medium；In some occasions, in addition it is also necessary to carry out direct current and exchange
Resistivity contrasts observe or joint observation, therefore have both needed variable-frequency low-frequency ac stabilized current supply, while being also required for straight
Stream stabilized current supply.In geology industry, although also have using variable-frequency ac current stabilized power source, but domestic power supply is substantially output side
The variable-frequency power sources of wave mode, and the variable-frequency power sources of non-sinusoidal wave forms, and the stabilized current supply for generally using do not possess uninterruptedly substantially
Function, once commercial power interruption, it is necessary to the UPS of relatively high power power or engine power generation could maintenance work, this to need continue
Work and field work bring inconvenience.
The present invention not only can be with output frequency and the program-controlled sine wave low-frequency ac current stabilization electricity of electric current, it is also possible to output electricity
Program-controlled DC constant current electricity is flowed, while the electricity that interruption output 220V/50Hz exchanges are used for other electrical equipments is can also be without,
The power supply can meet China's earthquake, the various needs of geology industry Apparent Resistivity Observation.
The content of the invention
In order to overcome the industries such as current seismological observation, earthquake engineering, hydrogeology, carry out what earth resistivity measurement was used
The deficiency of stabilized current supply, meets the jamproof technical requirements of Apparent Resistivity Observation, and realize that AC/DC comparative observation, joint are seen
The need for survey.The invention provides the uninterrupted frequency-conversion steady-flow electricity that a kind of utilization switch power technology, frequency conversion inversion transformation technique are designed
Source, the power supply not only can be with output frequency and the program-controlled sine wave low-frequency ac stabilized current supply of electric current, for Apparent Resistivity Observation
Equipment is used, or the program-controlled DC current stabilized power supply of output current, is used for Apparent Resistivity Observation equipment, while can be with defeated
Go out 220V/50Hz alternating currents to be used for other electrical equipments.
It is of the invention mainly to be exchanged by Type of Switch Stabilivolt Source Circuit and charging circuit, frequency-conversion steady-flow inverter circuit, 220V/50Hz
Inverter circuit, AC/DC reference signal are produced and control circuit, batteries and working power circuit composition.
Brief description of the drawings
Fig. 1 is " uninterrupted frequency-conversion steady-flow circuit construction of electric power figure "；
Fig. 2 is " Type of Switch Stabilivolt Source Circuit operation principle block diagram "；
Fig. 3 is " civil power is input into and current rectifying and wave filtering circuit " figure；
Fig. 4 is " composite switch power converting circuit " figure；
Fig. 5 is " filtering high-frequency rectifier output circuit " figure；
Fig. 6 is " PWM is produced and control circuit " figure；
Fig. 7 is " the operation principle block diagram of frequency-conversion steady-flow inverter circuit "；
Fig. 8 is " AC/DC reference signal input circuit " figure；
Fig. 9 is " AC/DC pwm pulse is produced and logic conversion circuit " figure；
Figure 10 is " AC/DC pwm pulse isolated drive circuit " figure；
Figure 11 is " full-bridge inverting and current stabilization output circuit " figure；
Figure 12 is " the operation principle block diagram of 220V/50Hz ac converter circuits "；
Figure 13 is " 50Hz sine wave signals are produced and voltage sampling circuit " figure；
Figure 14 is " AC/DC reference signal is produced and control circuit " figure.
Specific embodiment
1st, circuit structure of the invention and function
It is mainly inverse by Type of Switch Stabilivolt Source Circuit, frequency-conversion steady-flow shown in circuit structure of the invention such as Figure of description (1)
Become circuit, 220V/50Hz ac converters circuit, AC/DC reference signal to produce and control circuit, batteries and working power
Circuit, this five part composition.Its major function is：
(1) Type of Switch Stabilivolt Source Circuit：In city during electricity condition, commercial power rectification is filtered into the circuit direct current of 310V or so
Electricity, and the direct current of this 310V or so is entered into line translation by composite switch power converting circuit, one group is transformed into 510V's
High voltage direct current, uses for frequency-conversion steady-flow inverter circuit, another group of direct current for being transformed into 110V (or 83V) left and right, to electric power storage
Pond group 8 saves (or 6 sections) and is charged；In commercial power interruption (inversion) state, the electric energy that the circuit will be stored in batteries, warp
Composite switch supply convertor enters line translation, is transformed into the high voltage direct current of 510V, for frequency-conversion steady-flow inverter circuit and 220V/
50Hz ac converter circuits are used.
(2) frequency-conversion steady-flow inverter circuit：The circuit is, by the high voltage direct current of 510V, to be reverse into the program control friendship of frequency current
Stream current stabilization electricity output (maximum output current is up to 3A), or it is reverse into program-controlled DC constant current output (the maximum output electricity of electric current
Stream is up to 5A).
(3) 220V/50Hz ac converters circuit：The circuit is in commercial power interruption (inversion) state, by the high pressure of 510V
DC inverter is exported into 220V/50Hz, electric current up to the exchange of 1A, and other electrical equipments are used altogether.
(4) AC/DC reference signal is produced and control circuit：The circuit produces that frequency is program-controlled with amplitude exchanges or width
Program-controlled direct current signal a reference source is spent, is used for frequency-conversion steady-flow inverter circuit；And provide control signal, control to other circuits
State switches or defencive function.
(5) batteries and working power circuit：The batteries of the circuit are made up of 8 sections (or 6 sections) batteries, are
Uninterrupted power source provides continual electric energy, while to the power supply required for other circuit offer work.
2nd, the operation principle of Type of Switch Stabilivolt Source Circuit
Shown in the operation principle block diagram such as accompanying drawing (2) of Type of Switch Stabilivolt Source Circuit.
Type of Switch Stabilivolt Source Circuit it is main by：Civil power be input into and current rectifying and wave filtering circuit, composite switch power converting circuit,
Filtering high-frequency rectifier output circuit, PWM are produced and control circuit composition.Its operation principle is as follows：
Civil power be input into and current rectifying and wave filtering circuit such as accompanying drawing (3) shown in, in figure J1 and K1 be respectively civil power input socket with
Switch, the anti-interference networks of LC are constituted by high-frequency filter capacitor GC1, GC2, GC3 and common choking coil L1, and D0 is rectifier bridge, and L2 is
Filter inductance, while playing the percussion of anti-big circuit, CE1 is high-voltage electrolytic capacitor.In city during electricity condition, the circuit will be defeated
After the 220V civil powers for entering are through anti-interference filtration, the rectified direct current for being filtered into 310V or so, is conveyed to multiple from P3, P4 end all the way
Mould assembly Switching Power Supply translation circuit；Give the exchange output in 220V/50Hz ac converter circuits respectively from P1, P2 end in another road
Circuit output, and PWM is produced and control circuit carries out the differentiation whether civil power interrupts.
Composite switch power converting circuit accompanying drawing such as (4) is shown, in figure：Tetra- power VMOS tube structures of M1, M2, M3, M4
Into a full bridge switching circuit, PR1~PR4, GC4~GC11 are the absorbing circuit of full bridge switching circuit, and T1 is switch transformation
Device, GC12 be anti-saturation electric capacity, PR5 and GC13 for switch transformer armature winding absorbing circuit, PR6 and GC14, PR7 and
GC15 is the absorbing circuit of switch transformer inversion (charging) winding, and PR8 and GC16 is the absorption of switch transformer secondary windings
Inversion (charging) winding of circuit, two power VMOS tubes of Q1, Q2 and switch transformer T1 constitute a push-pull switching circuit
(or full-wave rectifying circuit).
In city during electricity condition, the full bridge switching circuit of M1, M2, M3, M4 composition is activated work, while two work(of Q1, Q2
The drive signal of rate VMOS pipes is blocked, and composite switch power converting circuit is by the DC power conversion of 310V or so into can be with whole
Stream is filtered into the high frequency voltage of 510V HVDCs by the secondary windings of switch transformer T1, is exported through P5, P6；Due to Q1, Q2
The drive signal of two power VMOS tubes is blocked, now two internal body diodes D3, D4 of power VMOS tube of Q1, Q2 just into
Commutation diode, it is whole that inversion (charging) winding and VMOS pipes internal body diodes D3, D4 of switch transformer T1 just constitute all-wave
Current circuit, rectification is carried out to high frequency voltage, after being filtered through electric capacity GE2, interface J4 is passed through to electric power storage from diode D1 and resistance PR9
Pond group charges.
When commercial power interruption, the full bridge switching circuit of M1, M2, M3, M4 composition is prohibited work, while two work(of Q1, Q2
Rate VMOS pipes are activated work, now inversion (charging) winding composition of two power VMOS tubes of Q1, Q2 and switch transformer T1
One push-pull switching circuit, batteries are discharged by interface J4 and diode D2, and push-pull switching circuit is by 96V (or 72V)
Left and right battery release DC power conversion into can with rectifying and wave-filtering into 510V HVDCs high frequency voltage by switch transformation
The secondary windings of device T1, exports through P5, P6 and gives filtering high-frequency rectifier output circuit.
Shown in filtering high-frequency rectifier output circuit such as accompanying drawing (5), D5~D8 is high-frequency rectification diode in figure, PR10~
PR13 and GC16~GC19 compositions are absorbing circuits, and L3 is filter inductance, and GE3 and GE4 is filter capacitor, and PR14 is load electricity
Resistance.The high frequency voltage rectifying and wave-filtering that the circuit will be input into by P5, P6 is exported into the HVDC of 510V by P7, P8 end.
PWM is produced and control circuit such as accompanying drawing (6) is shown, and U1 and U4 are respectively city's electricity condition and inverter mode in figure
PWM is produced and control chip SG3525A, U3 are phase inverter CD4069 chips, resistance R8~R12, C2~C4, D3 and phase inverter
U3A (the A phase inverter in phase inverter CD4069 chips) constitutes the peripheral circuit of U1；Resistance R16~R21, C5~C7, D4 and
Phase inverter U3E (the E phase inverter in phase inverter CD4069 chips) constitutes the peripheral circuit of U4；Comparator U2 and resistance R1~
R7, diode D1 and D2, electric capacity C1, transformer T3 constitute civil power judging circuit；Resistance R14, R15 are defeated with High frequency filter respectively
Go out 510V in circuit HVDC P7, P8 output end be connected and R13 constitute output voltage sampling circuit；T2 is compound opening
The driving transformer of the PWM of power VMOS tube M1, M2, M3, M4 in power converting circuit is closed, P9~P16 is respectively and power VMOS
The control end grid G of pipe M1, M2, M3, M4 is connected with source S end；P17 and P18 connect composite switch power converting circuit respectively
The control end grid G of middle power VMOS tube Q1 and Q2；16th pin of U1 is a reference source 5.1V outputs of control chip SG3525A
End, provides a reference source to U2 and U4 respectively.
When being city's electricity condition, civil power judging circuit output low level makes city's electricity condition pwm pulse signal produce and control
Chip U1 starts generation PWM, and the pwm pulse drive signal of M1~M4 is exported by driving transformer T2, starts full-bridge switch electricity
Road works；The low level of civil power judging circuit output simultaneously, (F is individual anti-phase in phase inverter CD4069 chips for inverted device U3F
Device) after become high level, block U4 work makes U4 to export pwm pulse signal end for zero level, while high level block letter
Become low level again after number inverted device U3E, the electricity stored in start-up capacitance C7 is discharged, be in U4 and treat slowly to start shape
State, prevents U4 from directly exporting maximum pulse when being activated, to reach the purpose of protection circuit.When commercial power interruption, civil power
Judging circuit exports high level, and U1 is blocked, and the electricity stored in start-up capacitance C4 is discharged, and is in U1 and treats slow startup
State, while start U4 work, by power VMOS tube Q1 and Q2 in P17 and P18 startup composite switch power converting circuits
Work, electric energy in batteries is reverse into the constant voltage DC electricity output of 510V.
3rd, the operation principle of frequency-conversion steady-flow inverter circuit
Shown in the operation principle block diagram such as accompanying drawing (7) of frequency-conversion steady-flow inverter circuit.
Frequency-conversion steady-flow inverter circuit it is main by：AC/DC reference signal is input into and current sampling circuit, AC/DC PWM arteries and veins
Punching is produced and logic conversion circuit, AC/DC pwm pulse isolated drive circuit, full-bridge inverting and current stabilization output circuit composition.Its
Operation principle is as follows：
Shown in AC/DC reference signal input circuit such as accompanying drawing (8)：P19 is AC/DC reference signal input, warp
The follower that the B amplifiers of R13, R14 and U2 are constituted with subsequent, through R22 to P22 ports output to AC/DC pwm pulse generation and
Logic conversion circuit；Port P20 connects the output end that a bridge arm of AC/DC inverter bridge, P21 connect current stabilization output, and IR is
The sample resistance of output current, after the difference amplifier constituted via the D amplifiers of R15~R18 and U2 amplifies, then through R19, R20
The follower constituted with the A amplifiers of U2 produces to AC/DC pwm pulse through R21 to port P22 outputs and logic becomes with subsequent
Circuit is changed, AC/DC reference signal and current sample amplify signal and form the signal that inversely adds herein.
AC/DC pwm pulse is produced and logic conversion circuit such as accompanying drawing (9) is shown：The circuit is by pwm chip
UC3637 (2U5), the C amplifier of 2U4, logic circuit (CD4081 and CD4069) and peripheral circuit R23~R34,2C1~
2C3 is constituted, and the signal being input into by P22 gives isolated drive circuit through the pwm pulse that the circuit is produced through P23, P24 port.Should
The topmost feature of circuit is that the SPWM pulse-modulated signals that UC3637 (2U5) is produced are bipolar modulation signals, through logic electricity
Road (CD4081 and CD4069) is carried out after logical conversion, has been transformed into unipolarity sinewave modulation signal.
Shown in AC/DC pwm pulse isolated drive circuit such as accompanying drawing (10)：U8 and U9 are photoisolator 6N137, U10
It is the special grid drive chip IR2130 of VMOS, IGBT power device, 2R35~2R46,2C4 and 2C5 are their periphery electricity
Road.AC/DC full-bridge inverting electricity is supplied after the AC/DC pwm pulse signal isolation drive that be input into for P23, P24 port by the circuit
Road.
Shown in full-bridge inverting and current stabilization output circuit such as accompanying drawing (11)：2M1,2M2,2M3,2M4 are four VMOS of full-bridge
Pipe, 2C1~2C4 are peak absorbing electric capacity, and 2L1,2PR1 and 2GC3,2GC4 constitute high-frequency filter circuit, 2L2,2GC1,2GC2
It is π type filter circuits, 2PR2 is dummy resistance.The 510V that Type of Switch Stabilivolt Source Circuit and charging circuit Gong are come over by the circuit
DC inverter is exported into the low-frequency ac (or direct current) of required frequency and electric current.
4th, the operation principle of 220V/50Hz ac converters circuit
Shown in the operation principle block diagram such as accompanying drawing (12) of 220V/50Hz ac converter circuits.
220V/50Hz ac converters circuit it is main by：50Hz sine wave signals are produced and voltage sampling circuit, SPWM pulses
Produce and logic conversion circuit, SPWM impulsive quarantines drive circuit, full bridge inverter and 220V voltage-stabilizing output circuits composition.Its
Operation principle is as follows：
50Hz sine wave signals are produced and voltage sampling circuit such as accompanying drawing (13) is shown：3U1A, 3U1B, 3U1D are respectively four
Three operational amplifiers in discharge circuit chip LM324,3U1A, resistance 3R1~3R4, electric capacity 3C1 and 3C2, diode 3D1
With 3D2 constitute be one by Wien bridge circuit, produce 50Hz sine waves；3U1D, resistance 3R5~3R7, electric capacity 3C3 and 3C4 composition
Be a bandpass filter, play and shaping operation be filtered to 50Hz sine waves；3W1 is a precision potentiator, is passed through
It can be adjusted to a suitable amplitude, given the voltage follower being made up of 3U1B, resistance 3R8 and 3R9 and followed output.End
Mouth P31 and P32 is the port of alternating current 220V/50Hz outputs, is sampled through resistance 3R15,3R16 partial pressure, is formed by 3R13 and 3R14
The 50Hz sine wave reference signals of output are exported after being inversely added.
SPWM pulses generations and logic conversion circuit, SPWM impulsive quarantines in 220V/50Hz ac converter circuits drive
Circuit is produced with the AC/DC pwm pulse in frequency-conversion steady-flow inverter circuit and logic conversion circuit, AC/DC pwm pulse are isolated
Drive circuit is identical.
Full bridge inverter and 220V voltage-stabilizing output circuits are defeated with current stabilization with full-bridge inverting in frequency-conversion steady-flow inverter circuit
Go out circuit, just sample mode is different outer, also basically identical, its function is for coming by Type of Switch Stabilivolt Source Circuit and charging circuit
510V DC inverters into 220V/50Hz exchange electricity output.
5th, AC/DC reference signal is produced and controls the operation principle of circuit
AC/DC reference signal is produced and control circuit such as accompanying drawing (14) is shown.
In accompanying drawing (14), 2U0 is that singlechip chip AT89C55WD, 2U1 and 2U2 are 16 D/A converter MAX541,
2U3A~2U3D is four amplifier units of integrated transporting discharging LM324, and 2U3A, 2U3C, 2U3D and peripheral resistance 2R1~2R9 are constituted
Be an instrumentation amplifier for Differential Input, what 2U3B and peripheral circuit 2R10~2R12 was constituted is an amplifying circuit,
2U11 is Key and display circuit, is connected with 2U0 by bus, and 2U12 is the serial communication interface circuit MAX232 of 2U0.At this
In a little circuits, 2U0 is the core component of whole circuit, and digital coding and computing are carried out to sine wave by it, and by 2U1 and
Digital coding is converted into analog sine reference signal by 2U2, defeated by port P19 after amplifying through the shaping of rear class amplifying circuit
Go out.The display and setting of output frequency and size of current parameter can be carried out by 2U11 (Key and display circuit), setting
Frequency is three digits, can be from 0.00~100Hz, and setting is represented when the frequency of setting is 0.00 is direct current, the size of electric current
Can be from 0.1~5.0A (peak value), while the startup and halt instruction of power supply can be performed.Can also be carried out by serial line interface
The setting of various parameters and the startup of power supply, halt instruction.
Claims (8)
1. a kind of uninterrupted frequency-conversion steady-flow power supply, by Type of Switch Stabilivolt Source Circuit and charging circuit, frequency-conversion steady-flow inverter circuit,
220V/50Hz ac converters circuit, AC/DC reference signal are produced and control circuit, batteries and working power circuit group
Into, it is characterized in that：The power supply employs switch power technology and uninterrupted frequency conversion inverter technology, can uninterruptedly export frequency
Rate and the program-controlled low-frequency sine electric current of electric current, use for Apparent Resistivity Observation equipment；Or output current is program-controlled straight
Stream stabling current, uses for Apparent Resistivity Observation equipment；220V, 50Hz alternating current can also be exported simultaneously for other electrical equipments
Use.
2. the function of the uninterrupted output that uninterrupted frequency-conversion steady-flow power supply according to claim 1 has, it is characterized in that：
During civil power working condition, the 220V electric mains that Type of Switch Stabilivolt Source Circuit and charging circuit will be input into are transformed into 510 volts straight
Stream electricity, then it is reverse into variable-frequency ac current regulator electricity or DC constant current electricity output through frequency-conversion steady-flow inverter circuit；In commercial power interruption
During (inversion) state, under the control of control circuit, Type of Switch Stabilivolt Source Circuit and charging circuit by batteries store it is low
Straightening rheology changes 510V direct currents into, then is reverse into variable-frequency ac current regulator electricity or DC constant current through frequency-conversion steady-flow inverter circuit
Electricity output.
3. the function of uninterrupted output that uninterrupted switch stabilized current supply according to claim 1 has, it is characterized in that：
During commercial power interruption (inversion) state, the 510V direct currents that 220V ac converters circuit will be transformed into through Type of Switch Stabilivolt Source Circuit become
Change 220V, 50Hz exchange electricity output into, uninterrupted backup is provided to other electrical equipments.
4. the Type of Switch Stabilivolt Source Circuit and charging circuit according to claim 1, claim 2 and claim 3, are one
Individual composite switch power converting circuit, it is characterized in that：Electric main is converted into 510V by the translation circuit in city's electricity condition
Direct current is used for frequency-conversion steady-flow inverter circuit and 220V, 50Hz ac converter circuit, while providing charging to batteries；In city
When electricity interrupts (inversion) state, by direct current in battery be converted into 510V power supplys for frequency-conversion steady-flow inverter circuit and 220V,
50Hz ac converter circuits are used.
5. the frequency-conversion steady-flow inverter circuit according to claim 1, claim 2, is one defeated by AC/DC reference signal
Enter with current sampling circuit, AC/DC pwm pulse produce and logic conversion circuit, AC/DC pwm pulse isolated drive circuit,
The frequency-conversion steady-flow inverter circuit that full-bridge inverting is constituted with current stabilization output circuit, it is characterized in that：Sine wave signal is carried out into bipolarity
After modulation, then unipolarity sinewave modulation signal is transformed to, then isolation drive full bridge inverter again.
6. 220V, 50Hz ac converter circuit according to claim 1, it is characterized in that：Sample Wien bridge circuit and band logical
Wave filter produces the reference signal of 50Hz.
7. alternating current-direct current reference signal according to claim 1 is produced and control circuit, it is characterized in that：Sampling single-chip microcomputer and 16
Position D/A converter, the AC/DC base value signal of variable ratio frequency changer, time-varying amplitude is produced by programming.
8. composite switch power converting circuit according to claim 4, is to charge and being combined that inversion can be used inversely
Type Switching Power Supply translation circuit, it is characterized in that：The power converting circuit breaker in middle transformer has three windings, and one is city's electric winding
(armature winding), two are the windings (secondary windings) for producing 510V, and also one is exactly the/inversion winding that charges；In commercial power interruption
During (inversion) state, charging/inversion winding and VMOS power devices constitute a push-pull type switching power circuit, by batteries
Direct current be converted into the high voltage direct current of 510V；In city during electricity condition, VMOS power devices are closed by control circuit, inside it
Diode become commutation diode, it and charging/inversion winding just constitute a full-wave rectifying circuit, by high-frequency ac
Electric rectification is into direct current to battery charging.
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Cited By (3)
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| CN109066573A (en) * | 2018-09-30 | 2018-12-21 | 张健 | A kind of new-energy automobile apparatus for protecting power supply |
| CN110138232A (en) * | 2019-05-20 | 2019-08-16 | 中国地震局地壳应力研究所 | Seismological observation low-frequency ac stabilized current supply |
| CN115663989A (en) * | 2022-10-20 | 2023-01-31 | 上海山源电子科技股份有限公司 | Commercial power inversion switching control method and circuit |
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| US20030169109A1 (en) * | 2002-03-11 | 2003-09-11 | Uis Abler Electronics Co., Ltd. | Active harmonic suppression equipment and control method therefor |
| CN201447288U (en) * | 2009-06-05 | 2010-05-05 | 吴光跃 | Energy feedback, energy storage and power saving circuit for elevators |
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| CN109066573A (en) * | 2018-09-30 | 2018-12-21 | 张健 | A kind of new-energy automobile apparatus for protecting power supply |
| CN110138232A (en) * | 2019-05-20 | 2019-08-16 | 中国地震局地壳应力研究所 | Seismological observation low-frequency ac stabilized current supply |
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| CN115663989A (en) * | 2022-10-20 | 2023-01-31 | 上海山源电子科技股份有限公司 | Commercial power inversion switching control method and circuit |
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| CN106712550B (en) | 2019-07-02 |
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