CN201674404U - Power supply device converting single phase to three phases - Google Patents
Power supply device converting single phase to three phases Download PDFInfo
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- CN201674404U CN201674404U CN2009202777832U CN200920277783U CN201674404U CN 201674404 U CN201674404 U CN 201674404U CN 2009202777832 U CN2009202777832 U CN 2009202777832U CN 200920277783 U CN200920277783 U CN 200920277783U CN 201674404 U CN201674404 U CN 201674404U
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- phase alternating
- power supply
- alternating current
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Abstract
The utility model discloses a power supply device converting single phase to three phases, which comprises a single-phase alternating-current power supply access end, a rectifier, a three-phase inverter and a three-phase alternating-current power supply output end. The single-phase alternating-current power supply access end is connected with the rectifier, the rectifier rectifying alternating-current voltage into direct-current voltage outputs the direct-current voltage to the three-phase inverter, the direct-current voltage is inverted into three-phase alternating-current voltage by the three-phase inverter, and the three-phase inverter transmits the three-phase alternating-current voltage to the three-phase alternating-current power supply output end. The power supply device has the advantages of simple structure, stable output voltage, safety and reliability. When applied in an occasion where only single-phase alternating-current power supplying is available without three-phase alternating-current power supplying, the power supply device can supply three-phase alternating-current power supply output so as to meet the use requirements of load needing the three-phase alternating-current power supplying, and is particularly suitable for application to power supplying for electric agricultural machinery or agricultural implements in rural fields so as to improve farming efficiency of peasants.
Description
Technical field
The utility model belongs to electrical equipment technical field, specifically, relates to a kind of supply unit that single-phase alternating current can be changed into three-phase alternating current.
Background technology
In the China of electricity needs sustainable growth, the construction of electrical network has become important problem, and it directly affects the speed of Chinese Economy Development.But the construction of electrical network is because its power transmission area is too big, and therefore the transmission of electricity difficulty, makes slow progress.The rural area of remote districts, place particularly on the throne, not only the electrical network coverage rate is lower, and second-rate, and especially those draw in the power supply gauze of field, often can only provide single-phase 220V AC power to use for peasant household.
And,, much all need the three-phase alternating current power supply such as electronic agricultural machinery or electronic farm implements for present agricultural machinery, such as three-phase 380V Alternating Current Power Supply.At this moment, the single-phase 220V AC power that electrical network provides does not obviously just meet the power reguirements of facility, thereby causes some agricultural machinery or farm implements out of use problem between the field, has seriously hindered the development process of agricultural automation level.The power device structure of traditional single-phase commentaries on classics three-phase is very simple, all is made up of the very big transformer of volume, threephase motor, capacitor and some control relays.During power work, threephase motor, capacitor disconnect, and threephase motor becomes generator, produces the phase place of disappearance, and three-phase electricity can be drawn, and are the power supply of three-phase power consumption equipment.The supply unit of this traditional single-phase commentaries on classics three-phase does not have adaptive control function, therefore has very big use defective, when the load wide variation, can cause the three-phase output voltage imbalance.In the time of zero load or underloading, output voltage can be elevated to above 25% of output voltage rated value; When load is excessive, also can reduce output voltage significantly, make equipment be difficult to starting or out of service.And for example, application number is that 01270275.7 utility model patent discloses a kind of single-phase change three phase mains transducer, though this transducer can realize single-phase electricity is converted to the instant switching of three-phase electricity, but because the deficiency of himself structure makes whole power supply changeover device still have the defective that volume is big, power is lower.
Based on this, demand proposing a kind of power-supply device that can satisfy different agricultural machinery and farm implements power reguirements urgently, to satisfy peasant's need for electricity better.
The utility model content
The purpose of this utility model is to provide a kind of and changes single phase alternating current (A.C.) voltage the supply unit of three-phase alternating voltage into, can only provide in the occasion of single-phase ac power supply three-phase alternating current with the power reguirements of electric loading to satisfy at some.
For overcoming above-mentioned defective, the utility model is achieved by the following technical solutions:
A kind of supply unit of single-phase commentaries on classics three-phase, it is characterized in that: this device comprises single phase alternating current power supply incoming end, rectifier, three-phase inverter and three-phase alternating current source output terminal, described single phase alternating current power supply incoming end connects rectifier, described rectifier becomes direct voltage to export three-phase inverter to ac voltage rectifier, by three-phase inverter the direct voltage inversion is generated three-phase alternating voltage again and transfer to described three-phase alternating current source output terminal, to be used to the electric that needs the three-phase alternating current power supply.
Adopt the supply unit of technique scheme design, the three-phase alternating-current supply of its output is the PWM waveform, can satisfy the load of needs PWM waveform supply power voltages such as motor and directly use, and, generally all need sine-shaped three-phase alternating-current supply for the mixed type load.At this moment, be connected with a sinusoidal wave processor between the output of described three-phase inverter and the three-phase alternating current source output terminal, after the voltage waveform that described sinusoidal wave processor is exported three-phase inverter is shaped as sine wave, export described three-phase alternating current source output terminal to, thereby satisfy the power reguirements of load.
Described sinusoidal wave processor comprises filter and power transformer, described filter comprises inductance and electric capacity, the input of described each inductance parallel with one another is connected with the output of power transformer, the output of described each inductance is parallel with an electric capacity respectively, the output head grounding of described each electric capacity.
The full-bridge three-phase inverting circuit that the main circuit of described three-phase inverter is made up of the IGBT pipe in order to reduce electric current and voltage at IGBT to the impact of IGBT itself from the process that is conducting to shutoff, all is parallel with a RC circuit at the two ends of each IGBT pipe.
Described rectifier, three-phase inverter and sinusoidal wave processor all are arranged at casing inside, and described single phase alternating current power supply incoming end and three-phase alternating current source output terminal are arranged on the casing, can make the supply unit of said structure form independently power supply unit like this.
In order to get rid of the interference between extraneous and the supply unit described in the utility model, described casing can be selected screening housing for use.
Compared with prior art, the utility model beneficial effect is:
1) supply unit described in the utility model is simple in structure, compare with existing three phase mains have that volume is little, light weight, power are big, output voltage stabilization, characteristics such as safe and reliable; Compare with the cost that uses the three-phase electricity consumption,, reduce production costs, increase profit for the user saves more multipotency source;
2) supply unit described in the utility model becomes 380V voltage with city 220V voltage transition, realizes three-phase alternating-current supply output, can be widely used in not having three-phase electricity or application three-phase electricity inconvenient area.Especially can the satisfy the demand demand of three-phase power consumption equipment such as manufacturer, distributors or medical institutions, township enterprise, scientific research detection, school, family of three phase supply, perfectly solving the user location does not have three-phase electricity or scarce three-phase electricity consumption, helps the user to use mechanized equipment to raise the efficiency;
Description of drawings
Fig. 1 is the circuit structure block diagram of single-phase commentaries on classics three phase mains device described in the utility model;
Fig. 2 is the circuit principle structure figure of sinusoidal wave processor;
Fig. 3 is the circuit principle structure figure of three-phase inverter;
Embodiment
Below in conjunction with accompanying drawing supply unit described in the utility model is done description in further detail.
As shown in Figure 1, the described single-phase commentaries on classics three-phase alternating current source apparatus of this example mainly is made up of rectifier and three-phase inverter: wherein, described single phase alternating current power supply incoming end Vin connects rectifier, after rectifier carries out the shaping processing to the alternating voltage that receives, generate direct voltage and export three-phase inverter to by its output, the needed three-phase alternating-current supply of level load after the three-phase inverter inversion generates, such as three-phase 380V AC power, transfer to three-phase alternating-current supply output end vo ut, and then export the load of back level to by power line, for the load that needs the three-phase alternating current power supply provides operating voltage.
Because the waveform of the alternating voltage by three-phase inverter output is the PWM waveform, therefore, the supply unit of present embodiment can directly drive the motor load running, also can need use load of PWM waveform three-phase alternating current power supply for some and directly power.
But, generally all need to use sine-shaped three-phase alternating current working power (for example three-phase 380V AC power) for the overwhelming majority with electric loading (for example mixed type load), therefore in order to satisfy these power reguirements with electric loading, present embodiment preferably is connected one road sinusoidal wave processor again between the output of described three-phase inverter and three-phase alternating-current supply output end vo ut, the PWM ripple of three-phase inverter being exported by sinusoidal wave processor is shaped to sine wave, and then export back level electric loading to by three-phase alternating-current supply output end vo ut, for the three phase sine AC power is provided with electric loading, to satisfy most power reguirements with electric loading.
As shown in Figure 2, the filter be made up of three inductance L 1～L3, three capacitor C 7～C9 of the described sinusoidal wave processor of this example and three phase power transformer are constituted.The input of described three phase power transformer is connected with the output of three-phase inverter as shown in Figure 2, the output of three phase power transformer links to each other with the input of inductance L 1～L3 respectively, the output of inductance L 1 links to each other with the input of capacitor C 8, the output of inductance L 2 links to each other with the input of capacitor C 9, the output of inductance L 3 links to each other with the input of capacitor C 7, the output head grounding of capacitor C 7～C9.The sinusoidal wave processor of this kind structure has the advantages that volume is little, precision is high.
As shown in Figure 3, the Digital Control of described three-phase inverter is the core of the single-phase commentaries on classics three phase supply of three-phase digital device, the full-bridge three-phase inverting circuit that the main circuit of three-phase inverter is made up of 6 IGBT pipes, be parallel with a RC circuit at the two ends of each IGBT pipe, the RC circuit is formed by a resistance and a capacitances in series.The effect of the RC circuit in parallel with IGBT pipe is to reduce the impact to IGBT itself of electric current and voltage at IGBT from the process that is conducting to shutoff.This three-phase inverter has the three-phase voltage balance, the characteristics that harmonic content is little owing to adopted the IGBT technology.
Described sinusoidal wave processor also can adopt an integrated chip or a contravariant transformer design with this function to realize, the series arm that also can adopt a routing capacitance and reactor to form designs, to play the purpose of design of the three-phase inverter output waveform being carried out shaping, present embodiment is not limited in above giving an example.
The supply unit that adopts said structure is when inserting the civil power operate as normal, by managing by 6 IGBT and 6 three-phase inverter generation SPWM ripples that the RC circuit is formed, sinusoidal wave processor by forming by three phase power transformer, inductance L 1～L3 and capacitor C 7～C9 then, forming line voltage is the three phase sine alternating current powering load of 220V, this supply unit has the advantages that volume is little, precision is high, stability is high, its power output can be widely used in up to 55KW.
Above-mentioned rectifier, three-phase inverter and sinusoidal wave processor are arranged on casing inside, described single phase alternating current power supply incoming end Vin and three-phase alternating-current supply output end vo ut are set on the casing, thereby can make described single-phase change three-phase alternating current source apparatus form independently power equipment, the convenient use.
The utility model has not only structurally carried out above-mentioned improvement; the software aspect has also adopted based on CAN network control technology of Digital Signal Processing (DSP) technology, express network communication and high reliability etc. and has been the software programmable technology of representative; and added the high-frequency pulsed width modulation technology; be built-in with the big capacity IGBT pipe that improves automatic protection functions; intelligent failure diagnosis detection technique; the liquid crystal display of the human-computer dialogue menu operation of graphical output; reach new technologies such as various anti-interference inhibition, make this supply unit in this area, occupy leading position.
Should be noted that at last: above only is two kinds of preferred implementations of the present utility model, only be not intended to limit in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. the supply unit of a single-phase commentaries on classics three-phase, it is characterized in that: this device comprises single phase alternating current power supply incoming end, rectifier, three-phase inverter and three-phase alternating current source output terminal, described single phase alternating current power supply incoming end connects rectifier, described rectifier becomes direct voltage to export three-phase inverter to ac voltage rectifier, by three-phase inverter the direct voltage inversion is generated three-phase alternating voltage again and transfers to described three-phase alternating current source output terminal.
2. according to the supply unit of the single-phase commentaries on classics three-phase described in the claim 1, it is characterized in that: be connected with a sinusoidal wave processor between the output of described three-phase inverter and the three-phase alternating current source output terminal, after the voltage waveform that described sinusoidal wave processor is exported three-phase inverter is shaped as sine wave, export described three-phase alternating current source output terminal to.
3. the supply unit of single-phase commentaries on classics three-phase according to claim 2 is characterized in that: described sinusoidal wave processor comprises filter and power transformer.
4. the supply unit of single-phase commentaries on classics three-phase according to claim 3, it is characterized in that: described filter comprises inductance and electric capacity, the input of described each inductance parallel with one another is connected with the output of power transformer, the output of described each inductance is parallel with an electric capacity respectively, the output head grounding of described each electric capacity.
5. the supply unit of single-phase commentaries on classics three-phase according to claim 2 is characterized in that: the full-bridge three-phase inverting circuit that the main circuit of described three-phase inverter is made up of the IGBT pipe, the two ends of each IGBT pipe all are parallel with a RC circuit.
6. according to the supply unit of the arbitrary described single-phase commentaries on classics three-phase of claim 2-5, it is characterized in that: described rectifier, three-phase inverter and sinusoidal wave processor all are arranged at casing inside, and described single phase alternating current power supply incoming end and three-phase alternating current source output terminal are arranged on the casing.
7. the supply unit of single-phase commentaries on classics three-phase according to claim 6 is characterized in that: described casing is selected screening housing for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202777832U CN201674404U (en) | 2009-12-14 | 2009-12-14 | Power supply device converting single phase to three phases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202777832U CN201674404U (en) | 2009-12-14 | 2009-12-14 | Power supply device converting single phase to three phases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201674404U true CN201674404U (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202777832U Expired - Lifetime CN201674404U (en) | 2009-12-14 | 2009-12-14 | Power supply device converting single phase to three phases |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201674404U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810989A (en) * | 2011-06-04 | 2012-12-05 | 深圳市万禧节能科技有限公司 | Simulated electromotive force energy saver |
| CN103683969A (en) * | 2013-08-07 | 2014-03-26 | 襄阳南车电气系统技术有限公司 | A converter which converts a single-phase power supply into a three phase power supply |
| CN106602887A (en) * | 2015-10-14 | 2017-04-26 | 福建省湄洲湾职业技术学校 | Single-phase alternating-current inverted three-phase alternating current inverter |
| CN109941314A (en) * | 2019-01-25 | 2019-06-28 | 中铁武汉电气化局集团有限公司上海分公司 | A kind of exchange goat switch operating gear |
| CN112564523A (en) * | 2020-12-21 | 2021-03-26 | 国网青海省电力公司海北供电公司 | Circuit for converting single-phase alternating current into three-phase alternating current |
-
2009
- 2009-12-14 CN CN2009202777832U patent/CN201674404U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810989A (en) * | 2011-06-04 | 2012-12-05 | 深圳市万禧节能科技有限公司 | Simulated electromotive force energy saver |
| CN103683969A (en) * | 2013-08-07 | 2014-03-26 | 襄阳南车电气系统技术有限公司 | A converter which converts a single-phase power supply into a three phase power supply |
| CN106602887A (en) * | 2015-10-14 | 2017-04-26 | 福建省湄洲湾职业技术学校 | Single-phase alternating-current inverted three-phase alternating current inverter |
| CN109941314A (en) * | 2019-01-25 | 2019-06-28 | 中铁武汉电气化局集团有限公司上海分公司 | A kind of exchange goat switch operating gear |
| CN112564523A (en) * | 2020-12-21 | 2021-03-26 | 国网青海省电力公司海北供电公司 | Circuit for converting single-phase alternating current into three-phase alternating current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101215 |