CN103683969A - A converter which converts a single-phase power supply into a three phase power supply - Google Patents
A converter which converts a single-phase power supply into a three phase power supply Download PDFInfo
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- CN103683969A CN103683969A CN201310340801.8A CN201310340801A CN103683969A CN 103683969 A CN103683969 A CN 103683969A CN 201310340801 A CN201310340801 A CN 201310340801A CN 103683969 A CN103683969 A CN 103683969A
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Abstract
The title of the present invention is a converter which converts a single-phase power supply into a three phase power supply, and relates to a load which converts electric energy from a single-phase power supply to a three phase power supply. The converter which converts the single-phase power supply into the three phase power supply mainly solves a problem that components of existing converters are high in cost and accordingly a total manufacturing cost is high. The converter of the invention comprises a rectifier bridge and an inverter. The converter of the invention is characterized in that: a controllable switch SREC is connected between output terminals of the rectifier bridge; an anode of a diode Dp is connected to a forward output terminal of the rectifier bridge and an effective terminal of a direct current input, and a cathode of another diode Dn is connected between a negative output terminal of the rectifier bridge and a grounding terminal of the direct current input; a central point of a capacitor set C1 and a capacitor set C2 connected to an output terminal of the rectifier bridge is one phase of the three phase output. The other two are composed of a silicon controlled rectifier switch S11, S12, S21, and S22 which are in series connection. A central point of the above capacitor sets C1 and C2 is connected to a neutral line of a single phase alternating current input and the direct current output terminal of the rectifier bridge. According to the invention, the manufacturing cost is low, and a greater advantage is that the converter has a voltage doubling function, and the converter can still work normally when a power supply voltage is relatively low.
Description
Technical field
The present invention relates to a kind of electric energy transducer, particularly relate to a kind of electric energy transducer of three phase mains that electric energy is converted to from a single phase poaer supply.
Background technology
Single phase poaer supply is converted to three phase mains, is mainly used in the single phase poaer supply voltage under family or little industry environment.Fig. 1 and Fig. 2 are the electrical schematic diagrams of known transducer, Fig. 1 shows single-phase to three phase converer 17, it comprises an input, for suppressing the filter 11 of current harmonics, a diode bridge 12, have the alternating-current voltage source 16 that variable service voltage is carried out to rectification, amplitude and frequency that capacitor 13 and inverter stage 14 are load 15 provide voltage.Fig. 2 illustrates again the single-phase transducer to three-phase of another kind of structure.Diode bridge 21 has comprised a simple circuit, and for proofreading and correct input power factor, this boost power factor is proofreaied and correct (PFC) circuit, comprising: 22, one inductors 23 of a gate-controlled switch and diode 24.Inductor 23 can reduce current harmonics, and in DC circuit, promotes circuit voltage.Diode 24 opens circuit and circuit voltage causes direct current capacitor short circuit while jumping at switch 22 for preventing.PFC circuit is drawn the source current figure of same phase and shape according to supply voltage, and then carrys out the input power factor of correcting converter.Each output in the inverter stage 14 of Fig. 1 and Fig. 2 has comprised two gate-controlled switches mutually, i.e. six three-phase outputs that switch forms altogether.Gate-controlled switch is connected on the positive pole or negative pole of DC line voltage output end, realizes the frequency change of alternating voltage by the simple model of modulated inverter switch.Structure shown in Fig. 1 and Fig. 2 is the exemplary of transducer in low voltage application.Such application comprises the engine that the driver of special purpose is used as being used as three phase electric machine in household electrical appliance.Transducer in Fig. 1 and Fig. 2 also can be used as an independently transducer, for the motor driven to user-defined application.These application comprise driving pump, blower fan and control electric tool.In the structure of Fig. 1, have a large inductor and six gate-controlled switches, the cost of these components and parts is quite high.In the structure of Fig. 2, the number of gate-controlled switch is 7, but the inductor using is less and more cheap.In the structure of Fig. 1 and Fig. 2, only have a supply voltage, and a universal architecture is not provided.The single-phase of prior art is the quantity of controlled member and required large inductance to the relevant problem of three phase converer, improved total manufacturing cost.
Summary of the invention
An object of the present invention is for above-mentioned deficiency, and a kind of low cost of manufacture is provided, the single phase poaer supply that can be used for a plurality of supply voltages is converted to the transducer of three phase mains.
Technical solution of the present invention is: the transducer that single phase poaer supply is converted to three phase mains comprises rectifier bridge and inverter, it is characterized in that: between the output of rectifier bridge, be connected with a controllable switch S REC, the positive pole of a diode Dp is connected to the forward output of rectifier bridge and the live end of direct current input, the negative pole of another diode Dn is connected between the negative output terminal and direct current input grounding end of rectifier bridge, is connected to the capacitor group C on rectification bridge output end
1, C
2central point be a phase of three-phase output, two-phase is by the reverse-blocking tetrode thyristor S connecting in addition
11, S
12, S
21, S
22form above-mentioned capacitor group C
1, C
2central point by a connecting valve CT, be connected on the neutral line of single phase alternating current (A.C.) input and a DC output end of rectifier bridge.
Connecting valve CT described in technical solution of the present invention is relay, contactor or thyristor.
Connecting valve CT described in technical solution of the present invention is that wire jumper connects.
The two-phase of the present invention output consists of the output of inverter, and the 3rd output phase consists of the central point of DC link, and the present invention only comprises 5 gate-controlled switches.An advantage of transducer of the present invention is to compare with the structure of prior art, has reduced the quantity of the effective member using in primary current path, has reduced manufacturing cost; Larger advantage of the present invention is, adopt the central point of capacitor group as the defeated phase of three-phase, this central point is connected to by a controlled connecting valve on one end of single phase poaer supply and rectifier bridge output DC power supply, the multiplication that can control output voltage by conducting and the obstruction of this connecting valve; The present invention still can normally work when supply voltage is lower, as the supply voltage of 110 volts or 230 volts all can normally be worked.
Accompanying drawing explanation
Fig. 1 is the transducer electrical schematic diagram of prior art.
Fig. 2 is the transducer electrical schematic diagram of another kind of prior art.
Fig. 3 is electrical schematic diagram of the present invention.
Embodiment
As shown in Figure 3, the rectifier of transducer 17 of the present invention is by diode D1, D2, and D3, D4 forms a rectifier bridge, and the input of diode rectifier bridge is at diode D1, D2 and diode D3, between D4, output is at diode D1, and D3 and diode D2, between D4.Access inductance L in is connected to the positive input terminal of diode rectifier bridge.Between the output of rectifier bridge, be connected with a controllable switch S REC, the positive pole of a blocking diode Dp is connected to the live end of the forward output of rectifier bridge and direct current input, and the negative pole of another blocking diode Dn is connected between the DC bus and direct current input grounding end of cathode output end of rectifier bridge.The polarity of blocking diode, makes electric current can flow to the negative output of the positive output end of rectifier bridge of DC link and the rectifier bridge of the DC link of negative supply rail of positive voltage.Controllable switch S REC is for correcting power factors, and takes action with together with inductance L in as a stepup transformer.The control of controllable switch S REC is carried out power factor correction by the input current waveform of revising in known manner.The capacitor C1 being connected in series, the capacitor group that C2 forms is connected on the output of rectifier bridge, and capacitor group just, connects in normal mode between negative voltage rail.The central point of capacitor group is the phase in three-phase output, the central point of capacitor group is connected on the neutral line of single phase alternating current (A.C.) input and an output of rectifier bridge by a connecting valve CT, 4 controllable switch S 11, S21, S12, S22 and their diode D11 in parallel, D21, D12, D22 forms the inverter of transducer of the present invention.These switches and corresponding diodes in parallel form the output in two stages of three-phase output, and the DC bus of the positive and negative rail between the switch of connecting by connections is connected in series in middle formation described in output.Utilize the DC bus-bar voltage of these switches or plus or minus can be connected to output, for threephase load 15 provides three-phase dc power supply.Connecting valve CT can be relay for example, contactor, and wire jumper or similarly device, the central point that can be used for capacitor group is connected to the AC power of negative input end.A times of the private DC bus-bar voltage of connecting valve CT, in an open position with respect to contactor.The upper limit of the DC circuit capacitor group charging capacitor group of charging current or half of lower limit.When electric current blocks by diode D1 and controllable switch S REC from power supply 16, power supply returns by the electric current of diode Dp and capacitor C1.When sense of current is contrary, the electric current of capacitor C 2 chargings of controllable switch S REC blocking diode Dn and diode D2 flows through.Two capacitor C1 and C2 are charged to the maximum of supply voltage, thus the DC bus-bar voltage after doubling.The central point of capacitor group of the present invention can be connected to the neutral line of AC power.The circuit arrangement of transducer can be used different supply voltages selectively, to adapt to, whether use when voltage multiplication function, be that central point connects, this transducer is the supply voltage being suitable for lower, voltage multiplication function can be passed through an automatic switch control system, when needs voltage multiplication pattern, connecting valve CT is made as to ON state (conducting), when not needing voltage to double, converter control system connecting valve CT is set to OFF state (obstruction), both connecting valve CT was controlled, for example, relay or contactor, or employing semiconductor switch, connecting valve CT also can adopt and be located at the housing of transducer or the manually operated diverter switch of enclosure.Connecting valve CT also can adopt wire jumper or similarly connect.
Claims (3)
1. a single phase poaer supply is converted to the transducer of three phase mains, comprise rectifier bridge and inverter, it is characterized in that: between the output of rectifier bridge, be connected with a controllable switch S REC, the positive pole of a diode Dp is connected to the forward output of rectifier bridge and the live end of direct current input, the negative pole of another diode Dn is connected between the negative output terminal and direct current input grounding end of rectifier bridge, is connected to the capacitor group C on rectification bridge output end
1, C
2central point be a phase of three-phase output, two-phase is by the reverse-blocking tetrode thyristor S connecting in addition
11, S
12, S
21, S
22form above-mentioned capacitor group C
1, C
2central point by a connecting valve CT, be connected on the neutral line of single phase alternating current (A.C.) input and a DC output end of rectifier bridge.
2. a kind of single phase poaer supply according to claim 1 is converted to the transducer of three phase mains, it is characterized in that: described connecting valve CT is relay, contactor or thyristor.
3. a kind of single phase poaer supply according to claim 1 is converted to the transducer of three phase mains, it is characterized in that: described connecting valve CT is that wire jumper connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310340801.8A CN103683969A (en) | 2013-08-07 | 2013-08-07 | A converter which converts a single-phase power supply into a three phase power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310340801.8A CN103683969A (en) | 2013-08-07 | 2013-08-07 | A converter which converts a single-phase power supply into a three phase power supply |
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| Publication Number | Publication Date |
|---|---|
| CN103683969A true CN103683969A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310340801.8A Pending CN103683969A (en) | 2013-08-07 | 2013-08-07 | A converter which converts a single-phase power supply into a three phase power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208693A (en) * | 2015-04-30 | 2016-12-07 | 深圳市健网科技有限公司 | A kind of DC-DC conversion circuit and converting power source |
| CN107093924A (en) * | 2016-02-17 | 2017-08-25 | 山西元壹本安电源科技有限公司 | Dual power supply delays time to control double interlocking alternating stable source case with anti-interference function |
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| CN101442263A (en) * | 2007-09-05 | 2009-05-27 | Abb公司 | Single-phase to three-phase converter |
| CN201674404U (en) * | 2009-12-14 | 2010-12-15 | 中国电力科学研究院 | Power supply device converting single phase to three phases |
| CN201750344U (en) * | 2009-12-29 | 2011-02-16 | 深圳市威捷机电技术有限公司 | Three-phase AC induction motor frequency converter for automatic expanding door |
| CN202330583U (en) * | 2011-11-14 | 2012-07-11 | 株洲南车时代电气股份有限公司 | Pure inductive load power evaluation system of alternating current/direct current/alternating current traction converter |
| CN202889212U (en) * | 2012-11-21 | 2013-04-17 | 兰州银利电器设备有限责任公司 | Single-phase to three-phase power purification device |
| CN203377794U (en) * | 2013-08-07 | 2014-01-01 | 襄阳南车电气系统技术有限公司 | Convertor capable of converting single-phase power supply into three-phase power supply |
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2013
- 2013-08-07 CN CN201310340801.8A patent/CN103683969A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442263A (en) * | 2007-09-05 | 2009-05-27 | Abb公司 | Single-phase to three-phase converter |
| CN201674404U (en) * | 2009-12-14 | 2010-12-15 | 中国电力科学研究院 | Power supply device converting single phase to three phases |
| CN201750344U (en) * | 2009-12-29 | 2011-02-16 | 深圳市威捷机电技术有限公司 | Three-phase AC induction motor frequency converter for automatic expanding door |
| CN202330583U (en) * | 2011-11-14 | 2012-07-11 | 株洲南车时代电气股份有限公司 | Pure inductive load power evaluation system of alternating current/direct current/alternating current traction converter |
| CN202889212U (en) * | 2012-11-21 | 2013-04-17 | 兰州银利电器设备有限责任公司 | Single-phase to three-phase power purification device |
| CN203377794U (en) * | 2013-08-07 | 2014-01-01 | 襄阳南车电气系统技术有限公司 | Convertor capable of converting single-phase power supply into three-phase power supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208693A (en) * | 2015-04-30 | 2016-12-07 | 深圳市健网科技有限公司 | A kind of DC-DC conversion circuit and converting power source |
| CN107093924A (en) * | 2016-02-17 | 2017-08-25 | 山西元壹本安电源科技有限公司 | Dual power supply delays time to control double interlocking alternating stable source case with anti-interference function |
| CN107093924B (en) * | 2016-02-17 | 2023-10-13 | 洛阳申耐电力设备有限公司 | Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function |
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Owner name: XIANGYANG CSR ELECTRIC MACHINERY CO., LTD. Free format text: FORMER OWNER: XIANGYANG CSR ELECTRICAL SYSTEM TECHNOLOGY CO., LTD. Effective date: 20150519 |
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Effective date of registration: 20150519 Address after: 441047 No. 132 Changhong North Road, Hubei, Xiangyang Applicant after: Xiangyang CSR Electric Machinery Co., Ltd. Address before: 441047 No. 359 mountain road, hi tech Development Zone, Hubei, Xiangfan Applicant before: XIANGYANG CSR ELECTRICAL SYSTEM TECHNOLOGY CO., LTD. |
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Application publication date: 20140326 |