CN104767395B - Variable-frequency power sources three-phase and single-phase output circuit - Google Patents
Variable-frequency power sources three-phase and single-phase output circuit Download PDFInfo
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- CN104767395B CN104767395B CN201510214977.8A CN201510214977A CN104767395B CN 104767395 B CN104767395 B CN 104767395B CN 201510214977 A CN201510214977 A CN 201510214977A CN 104767395 B CN104767395 B CN 104767395B
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Abstract
The invention discloses a kind of variable-frequency power sources three-phase and single-phase output circuit, including：Input circuit, soft starting circuit, current rectifying and wave filtering circuit, three-phase full-bridge inverting circuit, isolate transformation and filter circuit, three-phase and single-phase control switching circuit, three-phase output circuit, single-phase output circuit；Input circuit, soft starting circuit, current rectifying and wave filtering circuit are sequentially connected, current rectifying and wave filtering circuit is connected with three-phase full-bridge inverting circuit respectively, three-phase full-bridge inverting circuit also respectively with isolate transformation and filter circuit connection, isolation transformation and filter circuit be connected with three-phase output circuit, single-phase output circuit respectively with single-phase control switching circuit by three-phase.The present invention can realize that timesharing exports the three-phase voltage and single-phase voltage of Same Efficieney in a variable-frequency power sources, only need a variable-frequency power sources it is achieved that having saved the fund of half.
Description
Technical field
The present invention relates to Power Electronic Technique, more particularly to a kind of variable-frequency power sources three-phase and single-phase output circuit.
Background technology
Variable-frequency power sources is general to be converted by AC-DC-AC, is realized so that SPWM modes drive active member IGBT module, defeated
Go out the AC sine wave of adjustable frequency, adjustable voltage；The variable-frequency power sources of the existing output three-phase voltage of separate unit variable-frequency power sources, also has defeated
Go out the variable-frequency power sources of single-phase voltage.
Although separate unit variable-frequency power sources has the variable-frequency power sources of output three-phase voltage, also there is the variable-frequency power sources of output single-phase voltage,
But the three-phase voltage and single-phase voltage of timesharing output Same Efficieney in a variable-frequency power sources cannot be realized.As client has two differences not
The threephase load of many power and single-phase load, it is necessary to buy variable-frequency power sources and a variable-frequency electric for single-phase output that a three-phase is exported
Source, increased cost.
The content of the invention
The present invention is in order to solve the above-mentioned technical problem, there is provided a kind of variable-frequency power sources three-phase and single-phase output circuit, it is integrated
Function, saves cost.
To achieve these goals, the present invention is adopted the following technical scheme that.
Variable-frequency power sources three-phase and single-phase output circuit, including：Input circuit, soft starting circuit, current rectifying and wave filtering circuit, three-phase
Full bridge inverter, isolates transformation and filter circuit, three-phase and single-phase control switching circuit, three-phase output circuit, single-phase output
Circuit；Input circuit, soft starting circuit, current rectifying and wave filtering circuit are sequentially connected, current rectifying and wave filtering circuit respectively with three phase full bridge inversion
Circuit connect, three-phase full-bridge inverting circuit also respectively with isolate transformation and filter circuit connection, isolation transformation and filter circuit lead to
Three-phase is crossed to be connected with three-phase output circuit, single-phase output circuit respectively with single-phase control switching circuit.
As a further improvement on the present invention, the input circuit includes three-phase AC380V input powers L1, L2, L3 and three
Phase air switch K1.
The soft starting circuit includes contactor J1 and resistance R1, R2, R3 connected in parallel.
The current rectifying and wave filtering circuit include the pulse wave rectifier circuit of three-phase 6 that is made up of D1, D2, D3, D4, D5, D6 and with this
Filter capacitor C1, C2 of circuit connection.
The electric capacity C1 and C2 has been parallel with R4, R5 of proportionality action respectively.
Three-phase full-bridge inverting circuit includes：A phase IGBT full bridge inverters, B phase IGBT full bridge inverters and C phases IGBT
Full bridge inverter.Noninductive electric capacity C3, C4, C5 are attempted by three tunnel H full-bridge inverter circuit positive and negative ends, insulated gate bipolar respectively
Transistor npn npn Q1, Q2, Q3, Q4 constitute A phase IGBT full bridge inverters, insulated gate bipolar transistor Q5, Q6, Q7, Q8 composition B
Phase IGBT full bridge inverters, insulated gate bipolar transistor Q9, Q10, Q11, Q12 composition C phase IGBT full bridge inverters.
Isolation transformation and filter circuit include：Variable-frequency transformer T1 and by variable-frequency transformer T1 primary leakage inductances and electric capacity CA
The LC filter circuits of composition, variable-frequency transformer T2 and the LC filtered electricals being made up of variable-frequency transformer T2 primary leakage inductances and electric capacity CB
Road, variable-frequency transformer T3 and the LC filter circuits being made up of variable-frequency transformer T3 primary leakage inductances and electric capacity CC, filter high frequency load
Wave component, exports the standard sine wave of the certain voltage certain frequency of sets requirement.
The single-phase output circuit also includes single-phase air switch K2.
The three-phase output circuit also includes three-phase air switch K3.
As a further improvement on the present invention, the three-phase and single-phase control switching circuit, including three-phase ac contactor
J2, conversion controling switch K0, resistance R901, resistance R902, electric capacity C901, triode Q901, signal relay K902, diode
D902, signal relay K901-X.
Conversion controling switch K0 is connected with resistance R901；The R901 other ends and R902, electric capacity C901 and triode Q901 bases
The emitter stage connection of the common port connection of pole, R902, C901 one end and triode Q901；Q901 colelctor electrodes connect signal relay
One end of K902 coils and the positive pole of diode D902, the K902 coils other end and D902 negative poles are connected；K902 inhales when K0 is closed
Close, K902 disconnects when K0 is opened；It is single-phase mode when K0 is closed, is three phase modes when K0 is opened.
The tunnel contacts of signal relay K902 mono- control some signal relay K901-X；Signal relay K901-X is controlled respectively
The break-make of SPWM B phases processed, C corresponding SPWM corresponding with A, signal relay K901-X also control B phases, C phases respectively
The GL protection signal break-makes of GL protection signals and A phases.
The break-make of another road contact Synchronization Control A.C. contactor J2 of signal relay K902.
The mutual conversion and control of three-phase single-phase output pattern, by the opening and closing of conversion controling switch, Synchronization Control SPWM signals
Conversion and the switching of main circuit are realized.
The present invention includes following beneficial effect：Realize that timesharing exports the three-phase voltage of Same Efficieney in a variable-frequency power sources
And single-phase voltage, a variable-frequency power sources is only needed it is achieved that having saved the fund of half.
Certainly, implement any product of the invention to it is not absolutely required to while reaching all the above advantage.
Brief description of the drawings
Fig. 1 is variable-frequency power sources three-phase of the invention and single-phase output circuit diagram.
Fig. 2 is three phase mains output A phase SPWM waveforms generation and driving circuit principle block diagram.
Fig. 3 is three phase mains output B phase SPWM waveforms generation and driving circuit principle block diagram.
Fig. 4 is three phase mains output C phase SPWM waveforms generation and driving circuit principle block diagram.
Fig. 5 is single phase poaer supply output SPWM waveforms and drive circuit annexation block diagram.
Fig. 6 is three-phase and single-phase control switching circuit basic circuit diagram.
Fig. 7 is 10 control circuit connecting relation figures of signal relay.
Fig. 8 is the sign enlarged drawing in dotted line frame in Fig. 7.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, the variable-frequency power sources three-phase and single-phase output circuit of the present embodiment, including input circuit, soft start electricity
Road, current rectifying and wave filtering circuit, three-phase full-bridge inverting circuit, isolate transformation and filter circuit, three-phase and single-phase control switching circuit, three
Phase output circuit, single-phase output circuit.
Specifically include：Three-phase AC380V input powers L1, L2, L3 meet three-phase air switch K1, behind connect by contactor J1
The three-phase soft starting circuit constituted with resistance R1, R2, R3 connected in parallel, soft starting circuit connection by D1, D2, D3, D4, D5,
The pulse wave rectifier circuit of three-phase 6 of D6 compositions, picks up filter action electric capacity C1, C2 behind the pulse wave rectifier circuit of three-phase 6, electric capacity C1 and
C2 has been parallel with R4, R5 of proportionality action respectively；
Noninductive electric capacity C3, C4, C5 are attempted by three tunnel H full-bridge inverter circuit positive and negative ends, six half-bridge IGBT moulds respectively
Block constitutes three independent DC-AC inversion unit circuits, and insulated gate bipolar transistor Q1, Q2, Q3, Q4 composition A phase H full-bridges are inverse
Become circuit, variable-frequency transformer T1 plays a part of to isolate transformation, and primary leakage inductance and electric capacity CA the composition LC filter circuits of T1 filter height
Frequency carrier component, exports the standard sine wave of the certain voltage certain frequency of sets requirement；Insulated gate bipolar transistor Q5,
Q6, Q7, Q8 constitute B phase H full-bridge inverter circuits, and transformer T2 and electric capacity CB compositions B is isolated and LC filter circuits；Insulated gate is double
Bipolar transistor Q9, Q10, Q11, Q12 constitute C phase H full-bridge inverter circuits, and transformer T3 and electric capacity CC compositions C is isolated and LC
Filter circuit；Three-phase ac contactor J2 controls three-phase output, single-phase output to switch mutually according to sets requirement；Three-phase air is opened
Close K3 control three phase mains outputs, single-phase air switch K2 controls single phase poaer supply output.
It is required that A phases（A phase compositions：C3、Q1、Q2、Q3、Q4、T1、CA）, B phases（B phase compositions：C4、Q5、Q6、Q7、Q8、T2、
CB）, C phases（C phase compositions：C5、Q9、Q10、Q11、Q12、T3、CC）The characteristic of device composition performance is consistent, and device is reduced as far as possible
Part, layout, the otherness of line.
When three phase mains is exported, Fig. 2, Fig. 3, Fig. 4 are respectively that each phase SPWM waveform synthetic circuits and drive circuit are illustrated
Figure, and phase difference is 120 degree between A phase, B phase, C phase three-phase.When single phase poaer supply is exported, Fig. 5 is represented only with A phase SPWM waveforms
Combiner circuit is connected with the drive circuit of A phase, B phase, C phase three-phase；Purpose is the sine for ensureing output A phase, B phase, C phase three-phase
The frequency of ripple, phase, voltage magnitude are highly consistent；It is A phase, B phase, C phase three-phase output-parallel using laying control circuit base.
As shown in fig. 6, three-phase single-phase mode conversion controling switch K0, one end is connected with+12V, the other end and resistance R901
Connection；The R901 other ends are connected with the common port of R902, electric capacity C901 and triode Q901 base stages, R902, C901 one end and three
Pole pipe Q901 emitter stages connect together ground connection；Q901 colelctor electrodes meet signal relay K902（Two-way contact）One end of coil and two
The positive pole of pole pipe D902, the K902 coils other end and D902 negative pole short circuits are followed by+12V；K902 adhesives when K0 is closed, when K0 is opened
K902 disconnects；It is single-phase mode when K0 is closed, is three phase modes when K0 is opened.
The tunnel contacts of signal relay K902 mono- control 10 signal relay K901-X；As Figure 7-8, wherein 8 letters
Number relay controls the break-make of the corresponding SPWM of B phases, the C SPWMs corresponding with A respectively,（This 8 signal relays are respectively
K901-BL1、K901-BH1、K901-BL2、K901-BH2、K901-CL1、K901-CH1、K901-CL2、K901-CH2）, another two
Individual signal relay（K901-BGL、K901-CGL）Control B phases, the GL protection signals of C phases are led to the GL protection signals of A phases respectively
It is disconnected.
The coil two ends of the signal relay K901-X are parallel with diode D901-X respectively.
The break-make of the A.C. contactor J2 in another road contact Synchronization Control electric power main circuits of signal relay K902.
The mutual conversion and control of three-phase single-phase output pattern, be by the opening and closing of K0, the conversion of Synchronization Control SPWM signals and
What the switching of main circuit was realized.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (1)
1. variable-frequency power sources three-phase and single-phase output circuit, it is characterized in that, including：Input circuit, soft starting circuit, rectifying and wave-filtering electricity
Road, three-phase full-bridge inverting circuit, isolate transformation and filter circuit, three-phase and single-phase control switching circuit, three-phase output circuit, list
Phase output circuit；Input circuit, soft starting circuit, current rectifying and wave filtering circuit are sequentially connected, and current rectifying and wave filtering circuit is complete with three-phase respectively
Bridge inverter circuit connect, three-phase full-bridge inverting circuit also respectively with isolate transformation and filter circuit connection, isolation transformation and filtering
Circuit is connected with three-phase output circuit, single-phase output circuit respectively by three-phase with single-phase control switching circuit；
The input circuit includes three-phase AC380V input powers L1, L2, L3 and three-phase air switch K1；
The soft starting circuit includes contactor J1 and resistance R1, R2, R3 connected in parallel；
The current rectifying and wave filtering circuit include the pulse wave rectifier circuit of three-phase 6 that is made up of D1, D2, D3, D4, D5, D6 and with the circuit
Filter capacitor C1, C2 of connection；
The electric capacity C1 and C2 has been parallel with R4, R5 of proportionality action respectively；
Three-phase full-bridge inverting circuit includes：A phase IGBT full bridge inverters, B phase IGBT full bridge inverters and C phase IGBT full-bridges
Inverter circuit；Noninductive electric capacity C3, C4, C5 are attempted by three tunnel H full-bridge inverter circuit positive and negative ends respectively, and insulated gate bipolar is brilliant
Body pipe Q1, Q2, Q3, Q4 constitute A phase IGBT full bridge inverters, insulated gate bipolar transistor Q5, Q6, Q7, Q8 composition B phases
IGBT full bridge inverters, insulated gate bipolar transistor Q9, Q10, Q11, Q12 composition C phase IGBT full bridge inverters；
Isolation transformation and filter circuit include：Variable-frequency transformer T1 and it is made up of variable-frequency transformer T1 primary leakage inductances and electric capacity CA
LC filter circuits, variable-frequency transformer T2 and the LC filter circuits being made up of variable-frequency transformer T2 primary leakage inductances and electric capacity CB,
Variable-frequency transformer T3 and the LC filter circuits being made up of variable-frequency transformer T3 primary leakage inductances and electric capacity CC；
The single-phase output circuit also includes single-phase air switch K2；
The three-phase output circuit also includes three-phase air switch K3；
The three-phase and single-phase control switching circuit, including three-phase ac contactor J2, conversion controling switch K0, resistance R901,
Resistance R902, electric capacity C901, triode Q901, signal relay K902, diode D902, signal relay K901-X；
Conversion controling switch K0 is connected with resistance R901；The R901 other ends and R902, electric capacity C901 and triode Q901 base stages
Common port is connected, the emitter stage connection of R902, C901 one end and triode Q901；Q901 colelctor electrodes connect signal relay K902 lines
One end of circle and the positive pole of diode D902, the K902 coils other end and D902 negative poles are connected；
The tunnel contact control signal relay K901-X of signal relay K902 mono-；Signal relay K901-X controls B phases, C respectively
The break-make of SPWM corresponding SPWM corresponding with A, signal relay K901-X also believe respectively by control B phases, the GL protections of C phases
GL protection signal break-makes number with A phases；
The break-make of another road contact Synchronization Control A.C. contactor J2 of signal relay K902.
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| CN201510214977.8A CN104767395B (en) | 2015-04-30 | 2015-04-30 | Variable-frequency power sources three-phase and single-phase output circuit |
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| CN107017784B (en) * | 2017-05-05 | 2023-11-10 | 艾普斯电源（苏州）有限公司 | Power mode control method, control device and three-phase variable frequency power supply |
| CN107317505B (en) * | 2017-07-07 | 2023-10-27 | 吴忠市中心电焊机有限公司 | Be suitable for double-circuit full-bridge inverter circuit of two voltage automatic switching |
| CN107769604B (en) * | 2017-09-11 | 2024-04-19 | 廊坊英博电气有限公司 | Inverter |
| CN107546968A (en) * | 2017-10-10 | 2018-01-05 | 北京东标电子有限公司 | A kind of railway supply harmonic administers voltage-stabilizing system |
| CN107888058A (en) * | 2017-12-01 | 2018-04-06 | 中车大连机车车辆有限公司 | Have the train power supply device of DC600V and 3AC380V power supply capacities concurrently |
| CN116068361B (en) * | 2023-04-04 | 2023-07-11 | 常州博瑞电力自动化设备有限公司 | Alternating current test system |
| CN117154871B (en) * | 2023-07-31 | 2024-03-12 | 广东嘉尚新能源科技有限公司 | Lithium battery charging and discharging guarantee system in low-temperature environment |
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| CN201215788Y (en) * | 2008-05-21 | 2009-04-01 | 深圳和而泰智能控制股份有限公司 | Driving circuit for electric relay |
| CN101888089A (en) * | 2010-06-13 | 2010-11-17 | 珠海科达信电子科技有限公司 | Three-phase power voltage stabilizer with three-phase and three respective single-phase output function |
| CN201937482U (en) * | 2011-03-01 | 2011-08-17 | 山东沃森电源设备有限公司 | Multiplexed output variable-frequency power source |
| CN102223081B (en) * | 2011-06-09 | 2013-11-20 | 山西太钢不锈钢股份有限公司 | Method for charging high-capacity voltage type frequency converter |
| CN102340249B (en) * | 2011-08-03 | 2014-01-01 | 江南大学 | High power factor soft switching three-phase induction coil synthetic heating power supply |
| CN202634294U (en) * | 2012-07-11 | 2012-12-26 | 杨湘 | Frequency converter for energy-saving power generator for drilling |
| CN203674993U (en) * | 2014-01-28 | 2014-06-25 | 苏州工业园区海沃科技有限公司 | Three-phase variable-frequency power supply and single-phase output device |
| CN204118852U (en) * | 2014-08-12 | 2015-01-21 | 上海诺雅克电气有限公司 | Power transfer device |
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