CN110323950A - Single-phase step-up circuit and universal frequency converter - Google Patents
Single-phase step-up circuit and universal frequency converter Download PDFInfo
- Publication number
- CN110323950A CN110323950A CN201910761279.8A CN201910761279A CN110323950A CN 110323950 A CN110323950 A CN 110323950A CN 201910761279 A CN201910761279 A CN 201910761279A CN 110323950 A CN110323950 A CN 110323950A
- Authority
- CN
- China
- Prior art keywords
- diode
- phase
- coupled
- capacitor
- field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
- H02M5/02—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 without intermediate conversion into dc
- H02M5/04—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 without intermediate conversion into dc by static converters
- H02M5/22—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 without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of single-phase step-up circuit and universal frequency converters, aiming at the problem that single-phase electricity can not drive threephase load when frequency conversion in the prior art, provide following technical scheme, including rectification unit, buffer cell and inversion unit；Main circuit input terminal R, S, T of universal frequency converter are shorted together, the N-terminal of single-phase 220v AC power source is connected to the neutral point NP of filter capacitor by the end L of order phase 220v AC power source.After improving in this way, the DC bus-bar voltage DC2+ and DC2- of universal frequency converter can achieve direct current DC600V or so, and the direct current of 600v or so is converted by inversion unit, the alternating current of three-phase 380v, the alternating current generator operating of DC driven three-phase 380v can then be exported.This booster circuit based on universal frequency converter main circuit, it is transformed on the basis of the main circuit of universal frequency converter, it does not need to increase any additional cost and device, it is simple and easy to do, it can be widely applied to the occasion that single phase poaer supply turns three phase mains and the speed regulation that needs to boost.
Description
Technical field
The present invention relates to frequency conversion fields, more specifically, it relates to a kind of single-phase step-up circuit and universal frequency converter.
Background technique
Universal frequency converter cannot achieve boost function at present.When power input 380v voltage, frequency converter highest exports 380v
Voltage.When power input 220v voltage, frequency converter highest exports 220v voltage.Certain special occasions only have 220v single-phase alternating current
Source, but need to drive the alternating current generator of three-phase 380v is boosted problem in face of such main circuit for needing single-phase input three-phase to export,
Universal frequency converter is often helpless.
Summary of the invention
It, can be in view of the deficienciess of the prior art, the first object of the present invention is to provide a kind of single-phase step-up circuit
Frequency conversion makes the alternating current generator of 220v single phase alternating current power supply driving three-phase 380v simultaneously.
To achieve the above object, the present invention provides the following technical scheme that
A kind of single-phase step-up circuit, including rectification unit, buffer cell and inversion unit；
The rectification unit includes diode D1, diode D2, diode D3, diode D4, diode D5, diode D6,
The anode of middle diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5, two poles
The anode of pipe D3 is coupled to the cathode of diode D6, while the yin of the cathode of diode D1, the cathode of diode D2, diode D3
Pole is mutually coupled, the anode of diode D4, the anode of diode D5, diode D6 anode be mutually coupled；
The buffer cell includes that resistance R1 and the relay switch K in parallel with resistance R1, one end of resistance R1 are coupled to two
The cathode of pole pipe D1；
The inversion unit includes field-effect tube Q1, field-effect tube Q2, field-effect tube Q3, field-effect tube Q4, field-effect tube Q5, field
Effect pipe Q6, wherein field-effect tube Q1, field-effect tube Q2, field-effect tube Q3 source electrode be mutually coupled, the drain electrode of field-effect tube Q1
It is coupled to the source electrode of field-effect tube Q4, the drain electrode of field-effect tube Q2 is coupled to the source electrode of field-effect tube Q5, the leakage of field-effect tube Q3
Pole is coupled to the source electrode of field-effect tube Q6, and the drain electrode of field-effect tube Q4, field-effect tube Q5, field-effect tube Q6 are mutually coupled, field effect
Should the source electrode of pipe Q1 be coupled to the other end of resistance R1, the drain electrode of field-effect tube Q1 and the source electrode of field-effect tube Q4 couple, field effect
Should the drain electrode of pipe Q4 be coupled to diode D4 anode；
Further include capacitor C1 and is not coupled to field effect with the one end being connected capacitor C2 with the concatenated capacitor C2 of capacitor C1, capacitor C1
Should pipe Q1 source electrode, capacitor C2 is not coupled to the drain electrode of field-effect tube Q4 with the one end being connected capacitor C1.
The anode of diode D1, the anode of diode D2, diode D3 anode be mutually coupled to access 220V power supply
The tie point of firewire, capacitor C1 and capacitor C2 are used to access the zero curve of 220V power supply.
By adopting the above technical scheme, main circuit input terminal R, S, T of universal frequency converter are shorted together, order phase
The N-terminal of single-phase 220v AC power source is connected to the neutral point NP of filter capacitor by the end L of 220v AC power source.By improving in this way
After, the DC bus-bar voltage DC2+ and DC2- of universal frequency converter can achieve direct current DC600V or so, the direct current of 600v or so
Electricity is converted by inversion unit, then can export the alternating current of three-phase 380v, the alternating current generator fortune of DC driven three-phase 380v
Turn.This booster circuit based on universal frequency converter main circuit is transformed, no on the basis of the main circuit of universal frequency converter
Need to increase any additional cost and device, it is simple and easy to do, it can be widely applied to single phase poaer supply and turn three phase mains and need to rise
Press the occasion of speed regulation.
In view of the deficienciess of the prior art, the second object of the present invention is to provide a kind of universal frequency converter, can become
Frequency makes the alternating current generator of 220v single phase alternating current power supply driving three-phase 380v simultaneously.
To achieve the above object, the present invention provides the following technical scheme that
A kind of universal frequency converter, including single-phase step-up circuit as described above.
It preferably, further include three-phase voltage increasing circuit.
By adopting the above technical scheme, the boosting of three-phase can be carried out while can carry out single-phase step-up, support more applications.
Preferably, the three-phase voltage increasing circuit includes capacitor C3, capacitor C4, capacitor C5 and switch matrix, capacitor C3 string
It is associated between input A phase and input C phase, capacitor C4 is connected between input A phase and input B phase, and capacitor C5 is connected on input B phase
Between input C phase, switch matrix includes being connected to 9 switching circuits for exporting each phase and inputting between each phase.
Preferably, the switching circuit includes diode D7, diode D8, triode Q7, triode Q8, diode D7's
Anode is coupled to the input terminal of a certain phase, and cathode is coupled to the collector of triode Q7, and the emitter coupling of triode Q7 is a certain
The output end of phase, the emitter of triode Q8 are coupled to the anode of diode D7, and the collector of triode Q8 is connected to diode
The cathode of D8, the emitter of the anode triode Q7 of diode D8.
Preferably, further include switching circuit for switching single-phase step-up circuit Yu three-phase voltage increasing circuit, and for connecing
Receive the communication module of switching command.
By adopting the above technical scheme, control command is received by communication module, switching circuit is realized in response to switching command
Switch the free switching of single-phase step-up and three-phase voltage increasing.
Preferably, the switching circuit is transistor switching circuit.
By adopting the above technical scheme, circuit is simple, and cost is relatively low.
To the shortcomings of the prior art, the third object of the present invention is to provide a kind of single-phase step-up circuit, can become
Frequency makes the alternating current generator of 220v single phase alternating current power supply driving three-phase 380v simultaneously.
To achieve the above object, the present invention provides the following technical scheme that
A kind of single-phase step-up circuit, including rectification unit, filter capacitor group and inversion unit；
Rectification unit includes three input terminals and two output ends, and three input terminals of rectification unit are respectively the end R, the end S and T
End, three input terminals of rectification unit, which are shorted together, is coupled to exchange as one of input terminal of the single-phase step-up circuit
The end L of power supply；
Filter capacitor group is coupled on two output ends of rectification unit, and filter capacitor group includes concatenated capacitor C1 and capacitor
C2, the tie point NP between capacitor C1 and capacitor C2 are coupled to AC power source as another input terminal of the single-phase step-up circuit
N-terminal；
Inversion unit is coupled on two output ends of rectification unit for providing alternating current.
Preferably, the rectification unit include diode D1, diode D2, diode D3, diode D4, diode D5 and
Diode D6；
The anode of diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5, and two
The anode of pole pipe D3 is coupled to the cathode of diode D6；
The cathode of the cathode of diode D1, the cathode of diode D2 and diode D3 is mutually coupled using as rectification unit wherein one
A output end, the anode of the anode of diode D4, the anode of diode D5 and diode D6 are mutually coupled using as rectification unit
Another output；
Three input terminals of the anode of the anode of diode D1, the anode of diode D2 and diode D3 respectively as rectification unit
The sub- end T, the end S and the end R.
Preferably, buffer cell is coupled between the filter capacitor group and one of output end of rectification unit.
In conclusion the invention has the following advantages: the booster circuit based on universal frequency converter main circuit, general
It is transformed on the basis of the main circuit of frequency converter, does not need to increase any additional cost and device, it is simple and easy to do, it can be extensive
Turn the occasion of three phase mains and the speed regulation that needs to boost applied to single phase poaer supply.
Detailed description of the invention
Fig. 1 is the circuit diagram of single-phase step-up circuit in the present invention；
Fig. 2 is the functional block diagram of universal frequency converter in the present invention；
Fig. 3 is the circuit diagram of three-phase voltage increasing circuit in the present invention；
Fig. 4 is the circuit diagram for either switch circuit in switch matrix；
Fig. 5 is the circuit diagram of existing universal frequency converter main circuit.
In figure: 1, rectification unit；2, buffer cell；3, inversion unit；4, communication module；5, switching circuit；6, cubicle switchboard
Battle array.
Specific embodiment
With reference to the accompanying drawings and embodiments, the present invention will be described in detail.
Universal frequency converter is mainly by rectifying (AC to DC), filtering, inversion (direct current becomes exchange), brake unit, driving
The composition such as unit, detection unit microprocessing unit, the application constitute the main circuit by frequency converter by rectification, filtering, inversion,
That is the single-phase step-up circuit of the application.
The application is the technological improvement and innovation made on universal frequency converter main circuit, traditional common main circuit of converter
As shown in figure 5, including rectification circuit, two filter capacitor, buffer circuit and the inverter circuits being connected in series, universal frequency converter master
Circuit tool is respectively the end R, the end S and the end T there are three input terminal, in two filter capacitors (C10, C20) after rectification circuit
Both ends form the DC loop DC1+ and DC1- of universal frequency converter, also referred to as DC bus-bar voltage DC1- and DC1-, therefore, logical
When being connected in 380V AC power source with the end R of frequency converter, the end S and the end T, after exchange is become direct current after rectification circuit,
It is by the setting of filter capacitor (C10, C20), the voltage between the DC loop DC1+ and DC1- that make universal frequency converter is big
There are about 380*The DC voltage of=530V or so, the ceiling voltage of inversion unit output at this time are 380V alternating voltage, Ke Yizhi
Connect the alternating current generator of driving 380V.
Therefore, if input 220V AC power source, between the DC loop DC1+ and DC1- of universal frequency converter only about
The ceiling voltage of the DC voltage of 310V or so, the output of inversion at this time only has 220V AC voltage, can not drive 380V alternating current
Machine can only drive 220V alternating current generator.
Voltage about 380* of the application to the both ends filter capacitor (C10, C20)=530V does description below explanation: handing over
When galvanic electricity pressure directly acts on load, voltage constantly changes from zero to maximum value at any time, then virtual value is lower than maximum certainly
Value, about the 0.707 of maximum value times, that is to say, its peak value is 380 to be about divided by 0.707 to the voltage of actual measurement AC380V in fact
530V, rectified voltage still constantly change from zero to maximum value at any time, but after having capacitor, and situation is just different, work as electricity
When instantaneous value being pressed to be greater than some value, part energy is also stored in filter capacitor other than providing energy to load by power supply.When
When alternating current voltage instantaneous value is less than both ends of filter capacitor voltage, filter capacitor is kept to load discharge, i.e. load both end voltage
It is of substantially equal with both ends of filter capacitor voltage, so if AC rectification is electric after filtering in the case where load is not very big
Pressure is probably 530V or so, is the setting of filter capacitor above so that electricity between universal frequency converter DC loop DC1+ and DC1-
Press about 380*The DC voltage of=530V or so.
The application is directed to the defect of above-mentioned universal frequency converter and the technological innovation and progress made, and the application can be logical
With being transformed on the basis of main circuit of converter, do not need to increase any additional cost and device, so that universal frequency converter
Single-phase 220V AC power source be can be widely applied for for the use of three-phase 380V alternating current generator, it is simple and easy to do.
Embodiment 1
Universal frequency converter main circuit is also known as single-phase step-up circuit, referring to Fig.1, including rectification unit 1, be connected in series capacitor C1 and
Capacitor C2, buffer cell 2 and inversion unit 3, single-phase step-up circuit have the end R, the end S and the end T, and single-phase step-up circuit is (general
Main circuit of converter) the end R, the end S and the end T be shorted and connect on the end L of single-phase 220V AC power source together as input terminal all the way,
The N-terminal of single-phase 220V AC power source is connected on the tie point NP between capacitor C1 and capacitor C2 as another way input terminal.
Wherein, rectification unit 1 includes diode D1, diode D2, diode D3, diode D4, diode D5, diode
D6, wherein the anode of diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5,
The anode of diode D3 is coupled to the cathode of diode D6, while the cathode of diode D1, the cathode of diode D2, diode D3
Cathode be mutually coupled, the anode of diode D4, the anode of diode D5, diode D6 anode be mutually coupled.
Buffer cell 2 includes that resistance R1 and the relay switch K in parallel with resistance R1, one end of resistance R1 are coupled to two
The cathode of pole pipe D1, in other embodiments, relay switch K may be replaced by equivalent switching circuit.
Inversion unit 3 include field-effect tube Q1, field-effect tube Q2, field-effect tube Q3, field-effect tube Q4, field-effect tube Q5,
Field-effect tube Q6, wherein field-effect tube Q1, field-effect tube Q2, field-effect tube Q3 source electrode be mutually coupled, the leakage of field-effect tube Q1
Pole is coupled to the source electrode of field-effect tube Q4, and the drain electrode of field-effect tube Q2 is coupled to the source electrode of field-effect tube Q5, field-effect tube Q3's
Drain electrode is coupled to the source electrode of field-effect tube Q6, and the drain electrode of field-effect tube Q4, field-effect tube Q5, field-effect tube Q6 are mutually coupled, field
The source electrode of effect pipe Q1 is coupled to the other end of resistance R1, and the drain electrode of field-effect tube Q1 and the source electrode of field-effect tube Q4 couple, field
The drain electrode of effect pipe Q4 is coupled to diode D4 anode.Inversion unit 3 is used to be alternating current generator as the output of three-phase alternating current
Operating voltage is provided.
Capacitor C1 and capacitor C2 is connected in series, and capacitor C1 is not coupled to the source of field-effect tube Q1 with the one end being connected capacitor C2
Pole, capacitor C2 are not coupled to the drain electrode of field-effect tube Q4 with the one end being connected capacitor C1, thus in the capacitor C1 of series connection and
The both ends of capacitor C2 form DC bus-bar voltage DC2+ and DC2-.
The anode of diode D1, the anode of diode D2, diode D3 anode be mutually coupled to access 220V power supply
Firewire (i.e. the end R, the end S, the end T of single-phase step-up circuit, which are shorted together, to be connect on the end L of single-phase 220V power supply), capacitor C1 and electricity
The tie point NP for holding C2 is used to access the zero curve of 220V power supply.
After above-mentioned improvement, it is seen that the end AC power source L, diode D2, diode D3, capacitor C1, is handed over diode D1
Galvanic electricity source N-terminal constitutes a circuit.AC power source N-terminal, capacitor C2, diode D4, diode D5, diode D6, AC power source L
End constitutes a circuit, when 220V AC power source is in positive half period as a result, inputs from the end AC power source L, the both ends capacitor C1
Voltage about 220*=310V.Conversely, being inputted from AC power source N-terminal, capacitor when 220V AC power source is in negative half-cycle
The voltage at the both ends C2 about 220*=310V, the capacitor C1 being connected in series as a result, and capacitor C2 are by the two voltage superposition
The DC voltage of about 600V or so can be obtained afterwards, the DC voltage of the 600V or so is at the both ends of capacitor C1 and capacitor C2, i.e.,
Between the DC loop DC2+ and DC2- of universal frequency converter.
The working principle of the present embodiment:
Main circuit input terminal R, S, T of universal frequency converter are shorted together, the end L of order phase 220v AC power source is (i.e.
The firewire of 220V power supply), the N-terminal (i.e. the zero curve of 220V power supply) of single-phase 220v AC power source is connected to capacitor C1's and capacitor C2
Neutral point NP.After improving in this way, the DC bus-bar voltage DC2+ and DC2- of universal frequency converter can achieve direct current
The direct current of DC600V or so, 600v or so are converted by inversion unit 3, then can export the alternating current of three-phase 380v, direct current
Drive the alternating current generator operating of three-phase 380v.This booster circuit based on universal frequency converter main circuit, in universal frequency converter
It is transformed on the basis of main circuit, does not need to increase any additional cost and device, it is simple and easy to do, it can be widely applied to list
Phase power supply turns the occasion of three phase mains and the speed regulation that needs to boost.
Embodiment 2
Universal frequency converter main circuit is also known as single-phase step-up circuit, and referring to Fig.1, single-phase step-up circuit includes rectification unit 1, filtered electrical
Appearance group and inversion unit 3.
Rectification unit 1 includes three input terminals and two output ends, and 1 three input terminals of rectification unit are respectively the end R, S
End and the end T, three input terminals of rectification unit 1 are shorted together one of input terminal coupling as the single-phase step-up circuit
In the end L of AC power source, two output ends of rectification unit 1 are DC loop DC2+ and DC2-, also referred to as DC bus-bar voltage
DC2+ and DC2-.
Specifically, rectification unit 1 includes diode D1, diode D2, diode D3, diode D4, diode D5 and two
Pole pipe D6.The anode of diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5,
The anode of diode D3 is coupled to the cathode of diode D6.The cathode of diode D1, the cathode of diode D2 and diode D3
Cathode is mutually coupled using as the one of output end of rectification unit 1, the anode of diode D4, the anode of diode D5 and two poles
The anode of pipe D6 is mutually coupled using as 1 another output of rectification unit.The anode of diode D1, the anode of diode D2 and
Three input terminal T ends, S end and R end of the anode of diode D3 respectively as rectification unit 1.
Filter capacitor group is coupled on two output ends of rectification unit 1, filter capacitor group include concatenated capacitor C1 and
Capacitor C2, one end of capacitor C1 are coupled to one of output end of rectification unit 1, and the other end of capacitor C1 is coupled to capacitor C2
One end, the other end of capacitor C2 is coupled to the another output of rectification unit, the tie point between capacitor C1 and capacitor C2
NP is also referred to as neutral point NP, another input terminal of the tie point NP between capacitor C1 and capacitor C2 as the single-phase step-up circuit
It is coupled to the N-terminal of AC power source.
It is worth noting that being coupled with buffer cell between filter capacitor group and one of output end of rectification unit 1
2.Buffer cell 2 includes that resistance R1 and the relay switch K in parallel with resistance R1, one end of resistance R1 are coupled to diode D1
Cathode, in other embodiments, relay switch K may be replaced by equivalent switching circuit.
For the tool of inversion unit 3 there are two input terminal and three output terminals, three output terminals are respectively the end U, the end V and the end W,
Two input terminals of inversion unit 3 are coupled on two output ends of rectification unit 1, inversion unit 3 with for providing alternating current,
In one embodiment, inversion unit 3 is with for providing three-phase alternating current, three output terminals of inversion unit 3 can be coupled in
On three phase alternating current motor, for providing three phase alternating current motor three-phase alternating current.Inversion unit 3 such as inversion unit institute in embodiment 1
It states, this implementation is not repeated here.
As a result, in face of needing 220V single phase alternating current power supply to drive three-phase 380V alternating current generator, the present embodiment
It only needs for three ends input terminal R, the end S and the end T of rectification unit 1 to be shorted together as the single-phase step-up circuit wherein
One input terminal, another input terminal of tie point NP as the single-phase step-up circuit between capacitor C1 and capacitor C2, the list
One of input terminal of phase booster circuit is coupled to the end L of AC power source, another input terminal coupling of the single-phase step-up circuit
It is connected to the N-terminal of AC power source, passes through the setting of capacitor C1 and capacitor C2 as a result, in two output end (direct currents of rectification unit 1
Circuit DC2+ and DC2-) direct current of output about 600V then may be used after the direct current of 600v or so is converted by inversion unit 3
The use of three-phase 380V alternating current generator is supplied to export three-phase 380v alternating current.
Wherein, in face of three-phase 380V AC power driving three-phase 380V alternating current generator, the present embodiment is only needed
Tie point NP sky between capacitor C1 and capacitor C2 is connect, three ends input terminal R of rectification unit 1, the end S and the end T are direct
Three input terminals as the single-phase step-up circuit are linked into three-phase 380V AC power, can be in the direct current of rectification unit 1
Circuit DC2+ and DC2- export the DC voltage of 530V or so, and the ceiling voltage that inversion unit 3 exports at this time is 380V alternating current
Pressure, can directly drive the alternating current generator of 380V；
Also, in face of three-phase 220V AC power source driving three-phase 220V alternating current generator in the case where, the present embodiment only need by
Tie point NP sky between capacitor C1 and capacitor C2 connects, three ends input terminal R, the end S and the end T of rectification unit 1 directly as
Three input terminals of the single-phase step-up circuit are linked into three-phase 220V AC power source, can be in the DC loop of rectification unit 1
The DC voltage of DC2+ and DC2- output 310V or so, the ceiling voltage that inversion unit 3 exports at this time are 220V AC voltage, can
To directly drive the alternating current generator of 220V.
By the above-mentioned means, be transformed on the basis of the main circuit of universal frequency converter, do not need to increase it is any it is additional at
Sheet and device, it is simple and easy to do, it can be widely applied to occasion and three-phase that single phase poaer supply turns three phase mains and the speed regulation that needs to boost
Power supply turns the occasion of three phase mains.
Embodiment 3
A kind of universal frequency converter, referring to Fig.1 and Fig. 2 including the single-phase step-up circuit in such as embodiment 1 further includes three-phase liter
Volt circuit and switching circuit 5 for switching single-phase step-up circuit or three-phase voltage increasing circuit, switching circuit 5 are electrically connected with
For receiving the communication module 4 of switching command, in one embodiment communication module 4 for communication connection in mobile terminal,
Communication module 4 is for communication connection in management terminal or management server in another embodiment.
When facing different single phase alternating current power supplies or three-phase alternating-current supply situation, by by single-phase step-up circuit or three-phase
The input terminal of booster circuit connects in corresponding AC power source, and mobile terminal, management terminal or management server are for issuing
For switching command to universal frequency converter, universal frequency converter receives switching command by communication module 4, and in response to switching command with
Switching circuit movement is controlled, switching circuit realizes the circuit switching between three-phase voltage increasing circuit and single-phase step-up circuit.
In one embodiment, three-phase voltage increasing circuit is as shown in figure 5, three-phase voltage increasing circuit includes rectification circuit, filtered electrical
Three input terminals of appearance group and inverter circuit, rectification circuit are linked on three phase mains, the DC loop output of rectification circuit
DC voltage, inverter circuit output AC voltage, can directly drive alternating current generator at this time.
In another embodiment, referring to Fig. 3, three-phase voltage increasing circuit include three-phase voltage increasing circuit include capacitor C3, capacitor C4,
Capacitor C5 and switch matrix 6, capacitor C3 be connected on input A phase and input C phase between, capacitor C4 be connected on input A phase with it is defeated
Enter between B phase, capacitor C5 is connected between input B phase and input C phase, and switch matrix 6 includes being connected to each phase of output and input
9 switching circuits between each phase.
Referring to Fig. 4, switching circuit includes diode D7, diode D8, triode Q7, triode Q8, the sun of diode D7
Pole is coupled to the input terminal of a certain phase, and cathode is coupled to the collector of triode Q7, and the emitter of triode Q7 couples a certain phase
Output end, the emitter of triode Q8 is coupled to the anode of diode D7, and the collector of triode Q8 is connected to diode D8
Cathode, the emitter of the anode triode Q7 of diode D8.
In one embodiment, switching circuit 5 is transistor switching circuit, and in another embodiment, switching circuit 5 is
Electric-controlled type switching switch.
In one embodiment, communication module 4 is RS485 interface, and in another embodiment, communication module 4 is wireless
Transmission module, such as bluetooth module, WiFi module, 3G module or 4G module.
Therefore, universal frequency converter is provided with single-phase step-up circuit and three-phase voltage increasing circuit, universal frequency converter in embodiment
It is configured to connect single phase alternating current power supply in single-phase step-up circuit when having and only single phase alternating current power supply there are five input terminal
On two input terminals, switching circuit 5 is switched to returning for single-phase step-up circuit and three phase alternating current motor by issuing switching command
Road conducting can be realized single phase alternating current power supply driving three phase alternating current motor and use；
When having and only three-phase alternating-current supply, three-phase alternating-current supply is connect on three input terminals of three-phase voltage increasing circuit, is led to
It crosses to issue switching command switching circuit 5 is switched to three-phase voltage increasing circuit and be connected with the circuit of three phase alternating current motor, be can be realized
Three-phase alternating-current supply drives three phase alternating current motor to use.
It, will by switching circuit 5 when three phase alternating current motor breaks down and by the setting of above-mentioned switching circuit 5
The current supply circuit of three phase alternating current motor switches over, to achieve the purpose that three phase alternating current motor is out of service, realizes to three-phase
The protection of alternating current generator and protection to the universal frequency converter.
Correspondingly, the setting of the application application single-phase step-up circuit, single-phase step-up circuit have in face of single phase alternating current power supply,
The workable scene of 220V three-phase alternating-current supply, 380V three-phase alternating-current supply, can form redundancy with three-phase voltage increasing circuit,
When the failure of three-phase voltage increasing circuit is unable to run, it is only necessary to which three-phase alternating-current supply is connect to the end R, the end S in single-phase step-up circuit
On the end T, by the circuit switching of switching circuit 5, the application of single-phase step-up circuit can be realized, reach spare function.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of single-phase step-up circuit, it is characterized in that: including rectification unit (1), buffer cell (2) and inversion unit (3)；
The rectification unit (1) includes diode D1, diode D2, diode D3, diode D4, diode D5, diode D6,
Wherein the anode of diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5, and two
The anode of pole pipe D3 is coupled to the cathode of diode D6, while the cathode of diode D1, the cathode of diode D2, diode D3
Cathode is mutually coupled, the anode of diode D4, the anode of diode D5, diode D6 anode be mutually coupled；
The buffer cell (2) includes that resistance R1 and the relay switch K in parallel with resistance R1, one end of resistance R1 are coupled to
The cathode of diode D1；
The inversion unit (3) includes field-effect tube Q1, field-effect tube Q2, field-effect tube Q3, field-effect tube Q4, field-effect tube
Q5, field-effect tube Q6, wherein field-effect tube Q1, field-effect tube Q2, field-effect tube Q3 source electrode be mutually coupled, field-effect tube Q1's
Drain electrode is coupled to the source electrode of field-effect tube Q4, and the drain electrode of field-effect tube Q2 is coupled to the source electrode of field-effect tube Q5, field-effect tube Q3
Drain electrode be coupled to the source electrode of field-effect tube Q6, the drain electrode of field-effect tube Q4, field-effect tube Q5, field-effect tube Q6 are mutually coupled,
The source electrode of field-effect tube Q1 is coupled to the other end of resistance R1, and the drain electrode of field-effect tube Q1 and the source electrode of field-effect tube Q4 couple,
The drain electrode of field-effect tube Q4 is coupled to diode D4 anode；
Further include capacitor C1 and is not coupled to field effect with the one end being connected capacitor C2 with the concatenated capacitor C2 of capacitor C1, capacitor C1
Should pipe Q1 source electrode, capacitor C2 is not coupled to the drain electrode of field-effect tube Q4 with the one end being connected capacitor C1；
The anode of diode D1, the anode of diode D2, diode D3 anode be mutually coupled to access the firewire of 220V power supply,
The tie point of capacitor C1 and capacitor C2 is used to access the zero curve of 220V power supply.
2. a kind of universal frequency converter, it is characterized in that: including single-phase step-up circuit as described in claim 1.
3. universal frequency converter according to claim 2, it is characterized in that: further including three-phase voltage increasing circuit.
4. universal frequency converter according to claim 3, it is characterized in that: the three-phase voltage increasing circuit includes capacitor C3, capacitor
C4, capacitor C5 and switch matrix (6), capacitor C3 are connected between input A phase and input C phase, and capacitor C4 is connected on input A phase
Between input B phase, capacitor C5 is connected between input B phase and input C phase, and switch matrix (6) includes being connected to each phase of output
With 9 switching circuits inputted between each phase.
5. universal frequency converter according to claim 4, it is characterized in that: the switching circuit includes diode D7, diode
D8, triode Q7, triode Q8, the anode of diode D7 are coupled to the input terminal of a certain phase, and cathode is coupled to triode Q7's
Collector, the emitter of triode Q7 couple the output end of a certain phase, and the emitter of triode Q8 is coupled to the sun of diode D7
Pole, the collector of triode Q8 are connected to the cathode of diode D8, the emitter of the anode triode Q7 of diode D8.
6. universal frequency converter according to claim 5, it is characterized in that: further including for switching single-phase step-up circuit and three-phase
The switching circuit (5) of booster circuit, and the communication module (4) for receiving switching command.
7. universal frequency converter according to claim 6, it is characterized in that: the switching circuit (5) is transistor switching circuit.
8. a kind of single-phase step-up circuit, characterized in that including rectification unit (1), filter capacitor group and inversion unit (3)；
Rectification unit (1) includes three input terminals and two output ends, and (1) three input terminal of rectification unit is respectively the end R, S
End and the end T, three input terminals of rectification unit (1) are shorted together one of input terminal coupling as the single-phase step-up circuit
It is connected to the end L of AC power source；
Filter capacitor group is coupled on two output ends of rectification unit (1), and filter capacitor group includes concatenated capacitor C1 and electricity
Hold C2, the tie point NP between capacitor C1 and capacitor C2 is coupled to alternating current as another input terminal of the single-phase step-up circuit
The N-terminal in source；
Inversion unit (3) is coupled on two output ends of rectification unit (1) for providing alternating current.
9. single-phase step-up circuit according to claim 8, characterized in that the rectification unit (1) includes diode D1, two
Pole pipe D2, diode D3, diode D4, diode D5 and diode D6；
The anode of diode D1 is coupled to the cathode of diode D4, and the anode of diode D2 is coupled to the cathode of diode D5, and two
The anode of pole pipe D3 is coupled to the cathode of diode D6；
The cathode of the cathode of diode D1, the cathode of diode D2 and diode D3 be mutually coupled using as rectification unit (1) its
In an output end, the anode of the anode of diode D4, the anode of diode D5 and diode D6 is mutually coupled using as rectification
Unit (1) another output；
The anode of the anode of diode D1, the anode of diode D2 and diode D3 is defeated respectively as three of rectification unit (1)
Enter the end terminal T, the end S and the end R.
10. single-phase step-up circuit according to claim 8, characterized in that the filter capacitor group and rectification unit (1)
Buffer cell (2) are coupled between one of output end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811317723.9A CN109217689A (en) | 2018-11-07 | 2018-11-07 | Single-phase step-up circuit and universal frequency converter |
| CN2018113177239 | 2018-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110323950A true CN110323950A (en) | 2019-10-11 |
Family
ID=64995684
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317723.9A Pending CN109217689A (en) | 2018-11-07 | 2018-11-07 | Single-phase step-up circuit and universal frequency converter |
| CN201910761279.8A Pending CN110323950A (en) | 2018-11-07 | 2019-08-17 | Single-phase step-up circuit and universal frequency converter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811317723.9A Pending CN109217689A (en) | 2018-11-07 | 2018-11-07 | Single-phase step-up circuit and universal frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109217689A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111224562A (en) * | 2020-01-19 | 2020-06-02 | 珠海格力电器股份有限公司 | Method for improving voltage resistance of rectifying circuit, rectifying circuit and variable frequency air conditioner |
| CN113014079A (en) * | 2019-12-19 | 2021-06-22 | 东元电机股份有限公司 | Frequency converter device and method for selectively outputting current according to output voltage value |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953068B (en) * | 2019-05-17 | 2022-04-15 | 台达电子工业股份有限公司 | Power conversion system and method of operating the same |
-
2018
- 2018-11-07 CN CN201811317723.9A patent/CN109217689A/en active Pending
-
2019
- 2019-08-17 CN CN201910761279.8A patent/CN110323950A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014079A (en) * | 2019-12-19 | 2021-06-22 | 东元电机股份有限公司 | Frequency converter device and method for selectively outputting current according to output voltage value |
| CN113014079B (en) * | 2019-12-19 | 2022-02-01 | 东元电机股份有限公司 | Frequency converter device and method for selectively outputting current according to output voltage value |
| CN111224562A (en) * | 2020-01-19 | 2020-06-02 | 珠海格力电器股份有限公司 | Method for improving voltage resistance of rectifying circuit, rectifying circuit and variable frequency air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109217689A (en) | 2019-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107086770B (en) | PFC circuit and variable frequency air conditioner | |
| CN107276388B (en) | PFC circuit and variable frequency air conditioner | |
| CN103684202A (en) | Motor controller having driving, charging and discharging functions | |
| WO2017024642A1 (en) | Three-phase rectifier boost circuit and control method therefor, and uninterruptible power supply | |
| CN110323950A (en) | Single-phase step-up circuit and universal frequency converter | |
| CN104638949A (en) | Resistorless precharging | |
| WO2015000292A1 (en) | Uninterruptible power supply circuit | |
| CN103457506B (en) | A kind of wide input single-stage two-way buck-boost inverter | |
| CN207010546U (en) | PFC circuit and transducer air conditioning | |
| CN103138381A (en) | Alternating current and direct current power supply conversion device capable of improving standby electric power efficiency | |
| WO2017024641A1 (en) | Three-phase rectifier boost circuit and control method therefor, and uninterruptible power supply | |
| CN104956582A (en) | AC-AC converter device | |
| CN107104589A (en) | Pfc circuit and transducer air conditioning | |
| CN109889075A (en) | Drive control circuit and household appliance | |
| CN103036457B (en) | AC-DC converter | |
| CN100377481C (en) | Integration converton with three phase power factor correction | |
| CN103078548A (en) | Single-stage bidirectional buck-boost inverter | |
| CN212572394U (en) | Modular combined three-phase inverter | |
| CN112398185B (en) | Energy conversion device and vehicle thereof | |
| CN104796019A (en) | Z-source three-level PWM (pulse width modulation) rectifier and method for controlling same | |
| CN112152489A (en) | High-low voltage direct current dual-output integrated three-phase PWM rectifier converter and control method | |
| CN204481711U (en) | A kind of Z source three-level PWM rectifier | |
| CN206908512U (en) | PFC circuit and transducer air conditioning | |
| CN208820711U (en) | A kind of frequency converter | |
| CN209949483U (en) | Single-pole multi-mode wide-range input voltage electrolytic-capacitor-free LED driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |