CN107612296B - A kind of multi-mode power supply system based on three-phase bridge - Google Patents
A kind of multi-mode power supply system based on three-phase bridge Download PDFInfo
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- CN107612296B CN107612296B CN201710884202.0A CN201710884202A CN107612296B CN 107612296 B CN107612296 B CN 107612296B CN 201710884202 A CN201710884202 A CN 201710884202A CN 107612296 B CN107612296 B CN 107612296B
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Abstract
The multi-mode power supply system based on three-phase bridge that the invention discloses a kind of, including three phase bridge circuit, three groups of LC filter circuits in parallel, switching control module, detection conditioning circuit, DSP control circuit, driving circuit and auxiliary power circuit；DSP control circuit connects the input terminal of three phase bridge circuit by driving circuit, and the input terminal of three phase bridge circuit connects DC power supply, and the output end of three phase bridge circuit is exported by three groups of LC filter circuits and switching control module；Detection conditioning circuit be used for acquire three phase bridge circuit input terminal voltage, current information and first lead-out terminal, second output terminal son, third output terminal and the 4th output terminal voltage, current information；Detect the acquisition input terminal of the information output connection DSP control circuit of conditioning circuit；The control terminal of DSP control circuit connects switching control module；The multifunctional power of alternating current-direct current output is realized by relay switching, small in size, cost performance is high, economical and practical.
Description
Technical field
The present invention relates to electric system, distributed power generation, energy internet router, electric car, frequency controls, track
The technical field more particularly to one of supplied by AC/DC electricity is needed in the national economy such as traffic and flexible transmission technology and industrial and agricultural production
Multi-mode power supply system of the kind based on three-phase bridge.
Background technique
With the development of grid power electronization, single power supply tends not to meet the requirements in practical applications, therefore needs
It will be through powering respectively frequently with multiple power sources.Both uneconomical or inconvenient in this way.
Currently, three-phase bridge circuit reliable performance uses extensively, but it is normally only used for three-phase inversion or three-phase PWM rectification system
System, the electrical energy form provided are single.It tends not to meet the requirements for single power supply in practice, it is therefore desirable to through frequently with a variety of
The case where power supply is powered respectively.A kind of multi-mode power supply system based on three-phase bridge is proposed, is realized by relay switching
The multifunctional power of alternating current-direct current output, small in size, cost performance is high, economical and practical.
Summary of the invention
The multi-mode power supply system based on three-phase bridge that the object of the present invention is to provide a kind of, is realized by relay switching
The multifunctional power of alternating current-direct current output, small in size, cost performance is high, economical and practical.
The technical solution adopted by the present invention are as follows:
A kind of multi-mode power supply system based on three-phase bridge including three phase bridge circuit, three groups of LC filter circuits in parallel, is thrown
Cut control module, detection conditioning circuit, DSP control circuit, driving circuit and auxiliary power circuit；The DSP control circuit
The input terminal of three phase bridge circuit is connected by driving circuit, the input terminal of three phase bridge circuit connects DC power supply, three phase bridge circuit
Output end exported by three groups of LC filter circuits and switching control module；The detection conditioning circuit is for acquiring three-phase bridge
Voltage, current information and the first lead-out terminal of the input terminal of circuit, second output terminal, third output terminal and the 4th export
Voltage, the current information of terminal；Detect the acquisition input terminal of the information output connection DSP control circuit of conditioning circuit；DSP control
The control terminal of circuit processed connects switching control module；Auxiliary power circuit is DSP control circuit, detection conditioning circuit and driving electricity
Road power supply；
First phase output terminal of the three phase bridge circuit connects the first end of the first inductance in first group of filter circuit, the
The second end of one inductance connects first lead-out terminal, and the second end of the first inductance also passes through first capacitor and is connected to the 4th output end
Son,；Second phase output terminal of three phase bridge circuit connects the first end of the second inductance in second group of filter circuit, and the of the second inductance
Two ends connect second output terminal, and the second end of the second inductance also passes through the second capacitance connection to the 4th output terminal；Three-phase bridge
The first end of third inductance, the second end connection the of third inductance in the third phase output terminal connection third group filter circuit of circuit
Three output terminals, the second end of third inductance also pass through third capacitance connection to the 4th output terminal；4th output terminal is successively
The first end of the second inductance is connected to by the second end of third capacitor, the second end of the second capacitor, the second end of first capacitor；
The switching control module includes the first killer switch, the second killer switch, third killer switch, the
Four killer switches and the 5th killer switch；First killer switch is set to the second end and second output terminal of the second inductance
Between；Second killer switch is set between the second end and third output terminal of third inductance；The one of third killer switch
The first end of the second inductance of end connection, the other end connect the second end of first capacitor；4th killer switch is set to the second capacitor
Second end and third capacitor second end between；One end of 5th killer switch is connected to the cathode of DC power supply, another
Hold the second end for the third capacitor being connected to.
The detection conditioning circuit includes detection circuit and conditioning circuit, and detection circuit uses voltage and current hall sensing
Device, conditioning circuit use second order Butterworth low pass wave circuit.
The present invention utilizes the operating mode of DSP control circuit control system, is mainly based upon three phase bridge circuit and LC filtering
Circuit, the DC voltage inversion by DC power supply conveying are alternating current and direct current or the power supply for handing over straight mixed mode；Wherein,
Chip is controlled using traditional three-phase bridge and a DSP, by connecting different peripheral circuits, friendship is realized using relay switching
Direct current output；Wherein AC mode can support list/three-phase alternating current to export and be able to achieve harmonic source simulation, output frequency and output electricity
It presses adjustable, while can also realize that current stabilization exports, and have overcurrent (including peak value and virtual value), overvoltage and overload protection etc.
Function.DC mode can support direct current output and be able to achieve Buck decompression, constant current output, while also have overcurrent, overvoltage
With the functions such as overload protection.Two bridge arms composition H bridge in the main three-phase bridge of AC/DC mixing output mode externally provides blow-up
Stream, another bridge arm realize Buck buck functionality, are provided out direct current.There is body compared with common multiple-unit power supply system
Small, the high feature of cost performance of product.
Detailed description of the invention
Fig. 1 is schematic block circuit diagram of the invention；
Fig. 2 is AC modular system composition block diagram of the invention；
Fig. 3 is triangular wave control structure schematic diagram of the invention；
Fig. 4 is DC modular system composition block diagram of the invention；
Fig. 5 is DC mode principle explanatory diagram of the invention；
Fig. 6 is DC/AC mixed mode the system composition block diagram of the invention；
Fig. 7 is blow-up flow control schematic diagram under DC/AC mixed mode of the invention.
Specific embodiment
As shown in Figure 1, the present invention includes three phase bridge circuit, three groups of LC filter circuits in parallel, switching control module, detection
Conditioning circuit, DSP control circuit, driving circuit and auxiliary power circuit；The DSP control circuit is connected by driving circuit
The input terminal of three phase bridge circuit, the input terminal of three phase bridge circuit connect DC power supply BT, and the output end of three phase bridge circuit passes through three
Group LC filter circuit and the output of switching control module；The detection conditioning circuit is used to acquire the input terminal of three phase bridge circuit
The electricity of voltage, current information and the sub- B of first lead-out terminal A, second output terminal, third output terminal C and the 4th output terminal D
Pressure, current information；Detect the acquisition input terminal of the information output connection DSP control circuit of conditioning circuit；DSP control circuit
Control terminal connects switching control module；Auxiliary power circuit is DSP control circuit, detection conditioning circuit and drive circuitry.
First phase output terminal of the three phase bridge circuit connects the first end of the first inductance L1 in first group of filter circuit,
The second end of first inductance L1 connects first lead-out terminal A, and the second end of the first inductance L1 also passes through first capacitor C1 and is connected to
4th output terminal D；Second phase output terminal of three phase bridge circuit connects the first end of the second inductance L2 in second group of filter circuit,
The second end of second inductance L2 connects the sub- B of second output terminal, and the second end of the second inductance L2 also passes through the second capacitor C2 and is connected to
4th output terminal D；The first end of third inductance L3 in the third phase output terminal connection third group filter circuit of three phase bridge circuit,
The second end of third inductance L3 connects third output terminal C, and the second end of third inductance L3 also passes through third capacitor C3 and is connected to
4th output terminal D；4th output terminal D passes sequentially through the second end of third capacitor C3, the second end of the second capacitor C2, first
The second end of capacitor C1 is connected to the first end of the second inductance L2.
The switching control module is opened including the first killer switch K1, the second killer switch K2, third breaker
Close K3, the 4th killer switch K4 and the 5th killer switch K5；First killer switch K1 is set to the second of the second inductance L2
Between end and the sub- B of second output terminal；Second killer switch K2 set on third inductance L3 second end and third output terminal C it
Between；One end of third killer switch K3 connects the first end of the second inductance L2, and the other end connects the second end of first capacitor C1；
4th killer switch K4 is between the second end of the second capacitor C2 and the second end of third capacitor C3；5th killer switch
One end of K5 is connected to the cathode of DC power supply BT, the second end for the third capacitor C3 that the other end is connected to.
Illustrate the working principle of the invention with reference to the accompanying drawing:
The present invention controls chip using traditional three-phase bridge and a DSP, realizes that alternating current-direct current is defeated by relay switching
Multifunctional power out.The power supply is controlled based on digital signal processor (DSP), can be realized by connecting different peripheral circuits
AC, DC and AC DC mix three kinds of output modes.Wherein AC mode can support list/three-phase alternating current to export and be able to achieve harmonic source
Simulation, output frequency and output voltage it is adjustable, while can also realize current stabilization export, and have overcurrent (including peak value and effectively
Value), the functions such as overvoltage and overload protection.List/three-phase alternating current pressure stabilizing output completes control using SVPWM and three closed loop regulation technologies
System, the frequency and size of output voltage are given by man-machine interaction mode；Harmonic source simulation is using triangular wave comparison method realization, harmonic wave
The frequency and size of ource electric current are equally given by man-machine interaction mode, and system is configured to instruction electricity according to given frequency and size
Stream realizes tracking of the output electric current to instruction current using triangular wave comparison method, realizes the purpose of output harmonic wave.DC mode can
It supports direct current output: being adjusted by voltage and current double closed-loop PI and realize pressure stabilizing or constant current output, output mode switches by man-machine friendship
Mutual mode is given；Also have the functions such as overcurrent, overvoltage and overload protection simultaneously.The main three-phase of AC/DC mixing output mode
Two bridge arms composition H bridge in bridge externally provides single phase ac, another bridge arm realizes Buck buck functionality, is provided out direct current
Electricity.There is small in size, the high feature of cost performance compared with common multiple-unit power supply system.
DSP uses TI DSP28335；Detection circuit uses voltage and current Hall sensor, and conditioning circuit uses second order bar
Special Butterworth low-pass filter circuit.Signal condition is 0-3V according to A/D module feature inside DSP2000 by conditioning circuit, and is increased
Clipping function guarantee signal inside the DSP within the receptible range of signal of A/D module, the excessive damage caused to DSP of anti-stop signal
It is bad；Power supply auxiliary circuit is whole system power supply.
Operating mode is first determined whether after system electrification, switching circuit is controlled according to different operating modes, is completed corresponding
It is required that.
As shown in Fig. 2, controlling switching control module by DSP control circuit when system is arranged to three-phase AC mode
Movement, so that the first killer switch K1, the second killer switch K2 and the 4th killer switch K4 closure, third breaker
Switch K3 and the 5th killer switch K5 is disconnected.Three-phase inverting circuit is in system according to system requirements, using SPWM modulation
Fixed frequency or the output of frequency conversion pressure stabilizing three-phase, the frequency and voltage value of output are given by human-computer interaction.Under harmonic wave mode, equally
The harmonic current of output is given by human-computer interaction, and system realizes harmonic wave using current tracking method.Constant current is given as shown in Figure 3
It is made the difference for instruction current and actual current, then carries out PI adjusting, generation PWM wave is compared with triangular wave, control three-phase bridge
Realize three phase harmonic output.
It is as shown in Figure 4: when system is arranged to DC mode, the movement of switching control module is controlled by DSP control circuit,
So that the first killer switch K1, the second killer switch K2, the 4th killer switch K4 and the 5th killer switch K5 closure,
Third killer switch K3 is disconnected.At this point, three bridge arms are three independent Buck translation circuits.As shown in figure 5, working as each list
When bridge arm circuit is as step-down conversion circuit, if applying pwm signal at VT1 driving end, VT2 applies by signal, direct half-bridge
Translation circuit realizes buck chopper (Buck) translation circuit function, i.e. decompression transformation.Loss at this time mostlys come from afterflow two
Pole pipe VD2, when freewheeling diode works, if VT2 is connected, i.e. VD2 short circuit can eliminate VD2's with this method
Loss.Similarly, using the conducting of VT1, i.e. VD1 short circuit can also eliminate the loss of VD1.To three independent Buck translation circuits
It carries out controlling achievable DC mode output.DC mode can support three road DC voltage-stabilizings, constant current output, while also have electricity
The functions such as stream, overvoltage and overload protection.
As shown in fig. 6, controlling switching control by DSP control circuit when system is arranged to AC/DC mixing output mode
Module action processed, so that the first killer switch K1 and third killer switch K3 closure, composition H bridge realizes that single phase ac is defeated
Out.As shown in fig. 7, VT1 and VT2 add the signal of phase complements, while VT3 and VT4 add the signal of phase complements.Wherein VT1 and
VT4 is identical signal, and VT2 and VT3 are identical signal.Loading the voltage at both ends in this way is positive and negative alternate alternating voltage.
Using SPWM modulation make system be in fixed frequency or frequency conversion pressure stabilizing single-phase output, the frequency exported and voltage value by human-computer interaction to
It is fixed.Under harmonic wave mode, the harmonic current equally exported is given by human-computer interaction, and system is realized humorous using current tracking method
Wave output.It is that instruction current and actual current make the difference to constant current, then carries out PI adjusting, generation is compared with triangular wave
PWM wave, control H bridge realize single-phase harmonic wave.It is closed the second killer switch K2 and the 5th killer switch K5, disconnects the 4th
Killer switch K4, system third bridge arm form Buck translation circuit and realize direct current output.Its principle and Fig. 5 DC mode phase
Together.DC mode can support DC voltage-stabilizing, constant current output all the way, while also have the function such as overcurrent, overvoltage and overload protection
Energy.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it is still
Can modify to technical solution documented by previous embodiment, or some or all of the technical features are carried out etc.
With replacement；And these are modified or replaceed, technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
Range.
Claims (2)
1. a kind of multi-mode power supply system based on three-phase bridge, it is characterised in that: including three phase bridge circuit, three groups of LC filters in parallel
Wave circuit, switching control module, detection conditioning circuit, DSP control circuit, driving circuit and auxiliary power circuit；The DSP
Input terminal of the control circuit by driving circuit connection three phase bridge circuit, the input terminal connection DC power supply of three phase bridge circuit, three
The output end of phase bridge circuit is exported by three groups of LC filter circuits and switching control module；The detection conditioning circuit is for adopting
Collect three phase bridge circuit input terminal voltage, current information and first lead-out terminal, second output terminal son, third output terminal and
Voltage, the current information of 4th output terminal；Detect the acquisition input of the information output connection DSP control circuit of conditioning circuit
End；The control terminal of DSP control circuit connects switching control module；Auxiliary power circuit is DSP control circuit, detection conditioning circuit
And drive circuitry；
First phase output terminal of the three phase bridge circuit connects the first end of the first inductance in first group of filter circuit, the first electricity
The second end of sense connects first lead-out terminal, and the second end of the first inductance also passes through first capacitor and is connected to the 4th output terminal；
Second phase output terminal of three phase bridge circuit connects the first end of the second inductance in second group of filter circuit, the second end of the second inductance
Second output terminal is connected, the second end of the second inductance also passes through the second capacitance connection to the 4th output terminal；Three phase bridge circuit
Third phase output terminal connection third group filter circuit in third inductance first end, third inductance second end connection third it is defeated
Terminal out, the second end of third inductance also pass through third capacitance connection to the 4th output terminal；4th output terminal passes sequentially through
The second end of third capacitor, the second end of the second capacitor, the second end of first capacitor are connected to the first end of the second inductance；
The switching control module is broken including the first killer switch, the second killer switch, third killer switch, the 4th
Road device switch and the 5th killer switch；First killer switch is set to the second end and second output terminal of the second inductance
Between；Second killer switch is set between the second end and third output terminal of third inductance；One end of third killer switch
The first end of the second inductance is connected, the other end connects the second end of first capacitor；4th killer switch is set to the second capacitor
Between second end and the second end of third capacitor；One end of 5th killer switch is connected to the cathode of DC power supply, the other end
The second end for the third capacitor being connected to；
When DSP control circuit control switching control module movement so that the first killer switch K1, the second killer switch K2 and
When 4th killer switch K4 closure, third killer switch K3 and the 5th killer switch K5 are disconnected, three-phase bridge realizes three-phase
AC output；
When DSP control circuit control switching control module movement so that the first killer switch K1, the second killer switch K2,
4th killer switch K4 and the 5th killer switch K5 closure, when third killer switch K3 is disconnected, three-phase bridge realizes that DC is defeated
Out；
When the control switching control module movement of DSP control circuit, so that the first killer switch K1 and third killer switch K3
Closure, three-phase bridge realize single phase ac output；When the control switching control module movement of DSP control circuit, it is closed the second breaker
Switch K2 and the 5th killer switch K5, disconnects the 4th killer switch K4, and three-phase bridge realizes direct current output.
2. the multi-mode power supply system according to claim 1 based on three-phase bridge, it is characterised in that: the detection conditioning
Circuit includes detection circuit and conditioning circuit, and detection circuit uses voltage and current Hall sensor, and conditioning circuit uses second order bar
Special Butterworth low-pass filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710884202.0A CN107612296B (en) | 2017-09-26 | 2017-09-26 | A kind of multi-mode power supply system based on three-phase bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710884202.0A CN107612296B (en) | 2017-09-26 | 2017-09-26 | A kind of multi-mode power supply system based on three-phase bridge |
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| CN107612296A CN107612296A (en) | 2018-01-19 |
| CN107612296B true CN107612296B (en) | 2019-02-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194179B (en) * | 2018-10-24 | 2019-08-30 | 浙江科技学院 | Great power bidirectional AC/DC integrated power supply device |
| CN109510490A (en) * | 2018-12-29 | 2019-03-22 | 河南锂想动力科技有限公司 | A kind of Multi-function ac/dc power-supply system |
| EP3987640A4 (en) * | 2019-06-24 | 2022-06-29 | Texas Instruments Incorporated | Switching converter with multiple drive stages and related modes |
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| CN202455130U (en) * | 2011-12-31 | 2012-09-26 | 比亚迪股份有限公司 | Charging/discharging control system of electric vehicle and electric vehicle |
| CN202888833U (en) * | 2012-06-13 | 2013-04-17 | 湖北工业大学 | Power quality control system merged with active electric power filter and reactive compensation device |
| CN106208641A (en) * | 2016-09-18 | 2016-12-07 | 北京机械设备研究所 | A kind of circuit of alternating current-direct current multiplexing |
| CN106786739A (en) * | 2016-12-23 | 2017-05-31 | 北京天诚同创电气有限公司 | Inverter, inverter, inversion system and operation/cutting method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202455130U (en) * | 2011-12-31 | 2012-09-26 | 比亚迪股份有限公司 | Charging/discharging control system of electric vehicle and electric vehicle |
| CN202888833U (en) * | 2012-06-13 | 2013-04-17 | 湖北工业大学 | Power quality control system merged with active electric power filter and reactive compensation device |
| CN106208641A (en) * | 2016-09-18 | 2016-12-07 | 北京机械设备研究所 | A kind of circuit of alternating current-direct current multiplexing |
| CN106786739A (en) * | 2016-12-23 | 2017-05-31 | 北京天诚同创电气有限公司 | Inverter, inverter, inversion system and operation/cutting method |
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