CN102255550B - Power supply splitting phase device based on three-phase bridge inverter circuit and control method thereof - Google Patents
Power supply splitting phase device based on three-phase bridge inverter circuit and control method thereof Download PDFInfo
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- CN102255550B CN102255550B CN 201110185673 CN201110185673A CN102255550B CN 102255550 B CN102255550 B CN 102255550B CN 201110185673 CN201110185673 CN 201110185673 CN 201110185673 A CN201110185673 A CN 201110185673A CN 102255550 B CN102255550 B CN 102255550B
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Abstract
The invention discloses a power supply splitting phase device based on a three-phase bridge inverter circuit and a control method thereof, belonging to the technical field of circuit design. The device comprises one three-phase bridge inverter circuit, one capacitor and three reactors with equal inductance value, wherein the capacitor is connected with a DC (direct current) side of the three-phase bridge inverter circuit in parallel, three phase AC (alternating current) output ends of the three-phase bridge inverter circuit are respectively connected with a reactor in series and then accessedto a load, any two phase AC output ends of the three phase AC output ends are connected with an input end of a single-phase AC power supply; according to a module value of the load, an impedance angle of the load, a phase of the single-phase AC power supply, an amplitude of the single-phase AC power supply and a set input power factor of the single-phase AC power supply, the method can calculate an instruction current and generate PWM (pulse width modulation) trigger pulses to control opening and closing of a full-controllable switching device according to the instruction current. By using the device disclosed by the invention, electric elements can be lessened, the volume can be smaller and the network loss can be reduced.
Description
Technical field
The invention belongs to the circuit design technique field, relate in particular to a kind of power supply based on three-phase inverter bridge circuit and split mutually device and control method thereof.
Background technology
For the intrasystem three-phase load of single phase power supply (such as threephase motor), need to adopt power supply to split the phase technology to obtain three-phase alternating-current supply.Compare monophase machine, the efficient of three phase electric machine will exceed more than 10%, and reliable, vibration is little, noise is low, the life-span is long.Therefore, in distribution system, promote the use of the saving that three phase electric machine can be realized electric energy, create significant economic benefit.
Present common power supply splits the phase mode and utilizes electronic power rectification and inversion transformation technique to realize that its circuit structure comprises a diode rectifier bridge, filter inductance, electric capacity of voltage regulation and a three-phase inverter bridge circuit as shown in Figure 1.As can be seen from Figure 1, power supply commonly used splits mutually that device uses electronic component more, and cost is high, and volume is large, and easy care not.
Summary of the invention
The object of the invention is to, provide a kind of power supply based on three-phase inverter bridge circuit to split mutually device and control method thereof, reduce power supply commonly used and split mutually volume, the element of device, and reduce manufacturing cost.
Technical scheme is, a kind of power supply based on three-phase inverter bridge circuit splits mutually device, and device comprises 1 three-phase inverter bridge circuit, 1 electric capacity and 3 reactors that inductance value is equal to it is characterized in that splitting mutually by described power supply;
Wherein, the DC side parallel of described electric capacity and three-phase inverter bridge circuit;
The three-phase alternating current output of described three-phase inverter bridge circuit 1 reactor of connecting respectively;
The three-phase alternating current output access load of the three-phase inverter bridge circuit of described series reactor;
Any two-phase ac output end in the three-phase alternating current output of the three-phase inverter bridge circuit of described series reactor links to each other with the input of single phase alternating current power supply;
Each phase brachium pontis of described three-phase inverter bridge circuit is by the full-controlled switch device of two series connection and form with these two antiparallel diodes of full-controlled switch device respectively.
Described full-controlled switch device is insulated gate bipolar transistor IGBT.
Described full-controlled switch device is gate level turn-off thyristor GTO.
Described load is three-phase symmetrical impedance or the three phase electric machine of Y-connection.
Described load is three-phase symmetrical impedance or the three phase electric machine that triangle connects.
A kind of power supply based on three-phase inverter bridge circuit splits the mutually control method of device, it is characterized in that described control method comprises:
Step 1: the mould value of computational load and the impedance angle of load;
Step 2: obtain the phase place of single phase alternating current power supply voltage and calculate the amplitude of single phase alternating current power supply voltage;
Step 3: the input power factor of setting single phase alternating current power supply;
Step 4: according to the input power factor of the single phase alternating current power supply of the amplitude of the phase place of the impedance angle of the mould value of load, load, single phase alternating current power supply voltage, single phase alternating current power supply voltage and setting, computations electric current;
Step 5: generate the PWM trigger impulse that control full-controlled switch device cut-offs according to instruction current.
The described concrete chain rate that stagnates that adopts of PWM trigger impulse of cut-offfing according to instruction current generation control full-controlled switch device is controlled method, and its process comprises:
Step 501: calculate the capacitance voltage reference value, and the error of the actual value of itself and capacitance voltage is carried out the proportional integral computing, obtain voltage regulation signal;
Step 502: with the error of the actual current of instruction current and three-phase inverter bridge circuit output, and voltage regulation signal sends into hysteresis comparator, generates the PWM trigger impulse that control full-controlled switch device cut-offs.
Described calculating capacitance voltage reference value is utilized formula
Wherein M is the modulation ratio of three-phase inverter bridge circuit, and M≤1; U
RefThe capacitance voltage reference value, U
sBe the effective value of single phase alternating current power supply voltage, I is that power supply splits the mutually current effective value of device output, and L is the inductance value of reactor; W is the angular frequency of single phase alternating current power supply voltage.
Power supply provided by the invention splits mutually that device has reduced electric component, and volume is less; The single phase alternating current power supply output power factor can be regulated arbitrarily, has reduced network loss.
Description of drawings
Fig. 1 is that traditional power supply splits phase device circuit structure chart;
Fig. 2 is that the power supply based on three-phase inverter bridge circuit provided by the invention splits phase device circuit structure chart;
Fig. 3 is that the power supply based on three-phase inverter bridge circuit provided by the invention splits the mutually control method schematic diagram of device.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Fig. 2 is that the power supply based on three-phase inverter bridge circuit provided by the invention splits phase device circuit structure chart, among Fig. 2, the power supply based on three-phase inverter bridge circuit provided by the invention splits device mutually and comprises 1 three-phase inverter bridge circuit, 1 electric capacity and 3 reactors that inductance value equates.
Wherein, electric capacity and three-phase inverter bridge circuit DC side parallel.The three-phase alternating current output of three-phase inverter bridge circuit 1 the equivalent reactance device of connecting respectively; The three-phase alternating current output of three-phase inverter bridge circuit accesses load behind the series reactor respectively.The load of access can be three-phase symmetrical impedance or the three phase electric machine of Y-connection, also can be three-phase symmetrical impedance or three phase electric machine that triangle connects.
Any two-phase ac output end of having connected in the three-phase alternating current output of three-phase inverter bridge circuit of equivalent reactance device links to each other with the input of single phase alternating current power supply.
Each phase brachium pontis of three-phase inverter bridge circuit is by the full-controlled switch device of two series connection and form with these two antiparallel diodes of full-controlled switch device respectively.The full-controlled switch device can be insulated gate bipolar transistor IGBT, also can be gate level turn-off thyristor GTO.
Fig. 3 is that the power supply based on the three-phase bridge inverter circuit provided by the invention splits the mutually control method schematic diagram of device.In the present embodiment, be connected to example with the A cross streams output of three-phase inverter bridge circuit and C cross streams output and single phase alternating current power supply input, illustrate and utilize the power supply based on three-phase inverter bridge circuit provided by the invention to split mutually device, single phase alternating current power supply is converted to the control method of three-phase alternating-current supply.The specific implementation process of this control method is:
Step 1: according to known threephase load Z, the mould value of computational load | the impedance angle of Z| and load
Step 2: undertaken phase-lockedly by the voltage waveform to single phase alternating current power supply, obtain the phase place wt of single phase alternating current power supply voltage, and calculate the amplitude U of single phase alternating current power supply voltage
s
Step 3: the input power factor θ that sets single phase alternating current power supply.
Step 4: according to the mould value of load | the impedance angle of Z|, load
The amplitude U of the phase place wt of single phase alternating current power supply voltage, single phase alternating current power supply voltage
sWith the input power factor θ of the single phase alternating current power supply of setting, computations current i
Ref
Be connected to example with the A cross streams output of three-phase inverter bridge circuit and C cross streams output and single phase alternating current power supply input, the current reference value of the three-phase output end output of three-phase inverter bridge circuit is respectively:
Above-mentioned current reference value is instruction current i
Ref
Step 5: generate the PWM trigger impulse that control full-controlled switch device cut-offs according to instruction current.
The method that generates the PWM trigger impulse that control full-controlled switch device cut-offs according to instruction current can adopt the chain rate that stagnates to control method or triangular carrier control method.In the present embodiment, the process of the PWM trigger impulse that cut-offs according to instruction current generation control full-controlled switch device is described as example take the control method of chain rate that stagnates.This process is specifically:
Step 501: calculate the capacitance voltage reference value, and the error of the actual value of itself and capacitance voltage is carried out the proportional integral computing, obtain voltage regulation signal.
The capacitance voltage reference value is utilized formula
Calculate.Wherein, M is the modulation ratio of three-phase inverter bridge circuit, and M≤1; U
RefThe capacitance voltage reference value, U
sBe the effective value of single phase alternating current power supply voltage, I is that power supply splits the mutually current effective value of device output, and L is the inductance value of equivalent reactance device; W is the angular frequency of single phase alternating current power supply voltage.
Step 502: with the error of the actual current of instruction current and three-phase inverter bridge circuit output, and voltage regulation signal sends into hysteresis comparator, generates the PWM trigger impulse that control full-controlled switch device cut-offs.
The PWM trigger impulse that the control full-controlled switch device of above-mentioned generation cut-offs is applied to the full-controlled switch device of three-phase inverter bridge circuit, can make power supply provided by the invention split mutually symmetrical three-phase voltage and the three-phase current of device output.
Power supply provided by the invention splits mutually device and control method thereof, only needs a three-phase inverter bridge circuit can finish the power supply conversion, compares the tradition that rectification adds inversion and splits the phase mode, rectifier bridge and DC filtering inductance have been saved, volume is less, and cost is lower, and conversion efficiency is higher.In addition, the single phase alternating current power supply output power factor of device provided by the invention can be regulated arbitrarily, can improve in actual applications the power factor of electrical network, reduces network loss.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (3)
1. the power supply based on three-phase inverter bridge circuit splits the mutually control method of device, and should splitting based on the power supply of three-phase inverter bridge circuit mutually, device comprises 1 three-phase inverter bridge circuit, 1 electric capacity and 3 reactors that inductance value equates; Wherein, the DC side parallel of described electric capacity and three-phase inverter bridge circuit, the three-phase alternating current output of three-phase inverter bridge circuit 1 reactor of connecting respectively, the three-phase alternating current output access load of the three-phase inverter bridge circuit of series reactor, any two-phase ac output end in the three-phase alternating current output of the three-phase inverter bridge circuit of series reactor links to each other with the input of single phase alternating current power supply, each phase brachium pontis of three-phase inverter bridge circuit is by the full-controlled switch device of two series connection and form with these two antiparallel diodes of full-controlled switch device respectively, it is characterized in that described control method comprises:
Step 1: the mould value of computational load and the impedance angle of load;
Step 2: obtain the phase place of single phase alternating current power supply voltage and calculate the amplitude of single phase alternating current power supply voltage;
Step 3: the input power factor of setting single phase alternating current power supply;
Step 4: according to the input power factor of the single phase alternating current power supply of the amplitude of the phase place of the impedance angle of the mould value of load, load, single phase alternating current power supply voltage, single phase alternating current power supply voltage and setting, computations electric current;
Step 5: generate the PWM trigger impulse that control full-controlled switch device cut-offs according to instruction current.
2. control method according to claim 1 is characterized in that the described PWM trigger impulse that cut-offs according to instruction current generation control full-controlled switch device specifically adopts the chain rate that stagnates to control method, and its process comprises:
Step 501: calculate the capacitance voltage reference value, and the error of the actual value of itself and capacitance voltage is carried out the proportional integral computing, obtain voltage regulation signal;
Step 502: with the error of the actual current of instruction current and three-phase inverter bridge circuit output, and voltage regulation signal sends into hysteresis comparator, generates the PWM trigger impulse that control full-controlled switch device cut-offs.
3. control method according to claim 2 is characterized in that described calculating capacitance voltage reference value utilizes formula
Wherein M is the modulation ratio of three-phase inverter bridge circuit, and M≤1; U
RefThe capacitance voltage reference value, U
sBe the effective value of single phase alternating current power supply voltage, I is that power supply splits the mutually current effective value of device output, and L is the inductance value of reactor; W is the angular frequency of single phase alternating current power supply voltage.
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| CN 201110185673 CN102255550B (en) | 2011-07-04 | 2011-07-04 | Power supply splitting phase device based on three-phase bridge inverter circuit and control method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102664534B (en) * | 2012-05-09 | 2014-06-11 | 哈尔滨工程大学 | Three-phase alternating current-alternating current (AC-AC) direct frequency converter topology structure and control method thereof |
| CN104270028A (en) * | 2014-09-26 | 2015-01-07 | 电子科技大学 | Inverter circuit with multiple output voltages |
| JP2017189000A (en) * | 2016-04-05 | 2017-10-12 | 山洋電気株式会社 | Power Conditioner |
| CN106199167A (en) * | 2016-07-20 | 2016-12-07 | 合肥联信电源有限公司 | A kind of method of indirect detection inverter DC voltage |
| CN109828212A (en) * | 2019-02-28 | 2019-05-31 | 苏州工业园区职业技术学院 | A kind of CAN bus based electric car power supply monitoring system |
| CN110323955B (en) | 2019-06-14 | 2020-12-22 | 华为技术有限公司 | Off-grid phase splitter and inverter system |
| CN116632840B (en) * | 2023-07-24 | 2024-02-20 | 鹏元晟高科技股份有限公司 | Double-line mains supply input split phase output power supply system |
| CN117439435A (en) * | 2023-12-21 | 2024-01-23 | 深圳平创半导体有限公司 | Circuit driving method, system, equipment and medium for split-phase inverter circuit |
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Inventor after: Zhu Yongqiang Inventor after: Wang Tengfei Inventor after: Wang Zhiyu Inventor after: Duan Chunming Inventor after: Qi Lin Inventor after: Fu Chunpeng Inventor before: Zhu Yongqiang Inventor before: Wang Tengfei Inventor before: Liu Cong |
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Free format text: CORRECT: INVENTOR; FROM: ZHU YONGQIANG WANG TENGFEI LIU CONG TO: ZHU YONGQIANG WANG TENGFEI WANG ZHIYU DUAN CHUNMING QI LIN FU CHUNPENG |
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