CN102790532A - Universal switch power supply - Google Patents
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- CN102790532A CN102790532A CN201210260740XA CN201210260740A CN102790532A CN 102790532 A CN102790532 A CN 102790532A CN 201210260740X A CN201210260740X A CN 201210260740XA CN 201210260740 A CN201210260740 A CN 201210260740A CN 102790532 A CN102790532 A CN 102790532A
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Abstract
The invention discloses a universal switch power supply, which comprises a first filter circuit, an alternating circuit and a second filter circuit. An output end of the first filter circuit is connected with an input end of the alternating circuit, the output end of the alternating circuit is connected with the input end of the second filter circuit, and two terminals of the second filter circuit are output ends of the universal switch power supply. According to the universal switch power supply, the alternating circuit provided with two H-shaped bridges is utilized to convert direct voltage into alternating voltage so as to be subjected to treatment of rectification, thus transmission of two-way direct current power is realized. Since the step-up ratio is high, the structure of the circuit is simple, the control is simple and convenient, and the stability of output voltage is remarkable, the universal switch power supply conforms to the requirement on development of micro power grids. The universal switch power supply further has the advantages of novel design and structure, strong universality, low cost and the like.
Description
Technical field
The present invention relates to the technical field of power electronics, particularly, relate to a kind of Universal Switching Power Supply, it can realize 12V direct current-120V direct current bidirectional, dc power delivery, or 120V direct current-12V direct current bidirectional, dc power delivery.
Background technology
Universal Switching Power Supply is little electrical network important component part.Along with the fast development of the little electrical network of China, more and more vigorous for the demand of Universal Switching Power Supply, also increasingly high to the flexibility requirement of Universal Switching Power Supply power delivery.The Universal Switching Power Supply of good stability, realization bidirectional, dc power delivery meets the demand for development of little electrical network, has a good application prospect.
In order to accomplish the bidirectional, dc power delivery, Universal Switching Power Supply can adopt the Switching Power Supply of band isolated form and the Switching Power Supply of non-isolation type.Compare with the Switching Power Supply of band isolated form, that the Switching Power Supply of non-isolation type has is simple in structure, with low cost, the power utilization rate high and reliable and stable advantage.
Through the existing retrieval that is fit to bidirectional, dc power delivery technology is found; Article " the electric motor coach direct current machine drives the research of two-way buck-boost converter " (" Jiamusi University's journal "; The structure of the Switching Power Supply of describing 2005 the 3rd phases) lacks the boost structure of boosting, and its boost capability is low, and can produce current oscillation; Increased the complexity of control, can't be applied in little electrical network.
Need adopt new Universal Switching Power Supply for this reason, improve step-up ratio, improve the power utilization rate, simplify control, guarantee power supply quality.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides a kind of Universal Switching Power Supply, and it can realize the bidirectional, dc power delivery, has high step-up ratio, simple in structure, advantage such as control is easy, with low cost.
For realizing above-mentioned purpose; The invention provides a kind of Universal Switching Power Supply; It comprises first filter circuit, translation circuit and second filter circuit; The output of said first filter circuit links to each other with the input of said translation circuit, and the output of said translation circuit links to each other with the input of said second filter circuit, two outputs that terminal is a Universal Switching Power Supply of said second filter circuit;
Wherein, said first filter circuit is a condenser network, comprises first resistance and first electrochemical capacitor, and wherein, said first resistance is steady resistance, and its two ends link to each other with the input negative pole with the input of DC power supply is anodal; Said first electrochemical capacitor is parallelly connected with said first resistance, and its positive pole links to each other with said input is anodal, and its negative pole links to each other with said input negative pole;
Said translation circuit is the translation circuit with two H bridges, comprises first inductance, second inductance and eight IGBT, and wherein, the said first inductance two ends link to each other with the 3rd node with first node respectively; The said second inductance two ends link to each other with the 4th node with Section Point respectively; The one IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said first node; The 2nd IGBT collector electrode links to each other with said first node, and its emitter links to each other with said input negative pole; The 3rd IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said Section Point; The 4th IGBT collector electrode links to each other with said Section Point, and its emitter the 5th IGBT collector electrode that links to each other with said input negative pole links to each other with the output cathode of DC power supply, and its emitter links to each other with said the 3rd node; The 6th IGBT collector electrode links to each other with said the 3rd node, and its emitter links to each other with the output negative pole of DC power supply; The 7th IGBT collector electrode links to each other with said output cathode, and its emitter links to each other with said the 4th node; The 8th IGBT collector electrode links to each other with said the 4th node, and its emitter links to each other with said output negative pole; Wherein, Said first node is the brachium pontis mid point that a said IGBT and said the 2nd IGBT constitute; Said Section Point is the brachium pontis mid point that said the 3rd IGBT and said the 4th IGBT constitute; Said the 3rd node is the brachium pontis mid point that said the 5th IGBT and said the 6th IGBT constitute, and said the 4th node is the brachium pontis mid point that said the 7th IGBT and said the 8th IGBT constitute;
Said second filter circuit is a condenser network; Comprise second resistance and second electrochemical capacitor; Wherein, the said second electrochemical capacitor positive pole links to each other with said output cathode, and its negative pole links to each other with said output negative pole; Said second resistance is steady resistance, and its two ends are parallelly connected with the said second electrochemical capacitor two ends.
According to above-mentioned Universal Switching Power Supply; Wherein, The gate pole of described eight IGBT receives the pwm pulse control signal, and when forward power was transmitted, a said IGBT, the 2nd IGBT, the 3rd IGBT and the 4th IGBT constituted inverter; DC converting is imported for exchanging in the left side, through said first inductance and second inductive transmission to the rectifier that constitutes by said the 5th IGBT, the 6th IGBT, the 7th IGBT and the 8th IGBT and export direct current; During the backward power transmission; The inverter that said the 5th IGBT, the 6th IGBT, the 7th IGBT and the 8th IGBT constitute; Right side input is transformed to interchange, through said first inductance and second inductive transmission to the rectifier that constitutes by an IGBT, the 2nd IGBT, the 3rd IGBT and the 4th IGBT and export direct current.
According to above-mentioned Universal Switching Power Supply, wherein, the emitter of said the 2nd IGBT and the 4th IGBT links to each other with the emitter of said the 6th IGBT and the 8th IGBT.
Further, according to above-mentioned Universal Switching Power Supply, wherein; The gate pole of described eight IGBT receives the pwm pulse control signal; When a said IGBT and the 3rd IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward; When the 2nd IGBT and the 4th IGBT open shutoff with certain duty ratio, when all the other IGBT opened all the time, said translation circuit forward boosted; When the 5th IGBT and the 7th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the reverse step-down of said translation circuit; When the 6th IGBT and the 8th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward.
According to above-mentioned Universal Switching Power Supply, wherein, said translation circuit also comprises the 9th IGBT, the tenth IGBT, the 11 IGBT, the 12 IGBT and the 3rd inductance; The 5th node is the brachium pontis mid point that said the 9th IGBT and said the tenth IGBT constitute, and the 6th node is the brachium pontis mid point that said the 11 IGBT and said the 12 IGBT constitute; Wherein, said the 9th IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said the 5th node; The tenth IGBT collector electrode links to each other with the 5th node, and its emitter links to each other with said input negative pole; The 11 IGBT collector electrode links to each other with said output cathode, and its emitter links to each other with said the 6th node; The 12 IGBT collector electrode links to each other with said the 6th node, and its emitter links to each other with said output negative pole, and said the 3rd inductance two ends link to each other with said the 6th node with said the 5th node respectively.
Further; According to above-mentioned Universal Switching Power Supply; Wherein, the gate pole of said 12 IGBT receives the pwm pulse control signal, during the forward power transmission; A said IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 9th IGBT and the tenth IGBT constitute three-phase inverter; It is three-phase alternating current that DC converting is imported in the left side, through said first inductance, second inductance and the 3rd inductive transmission to the three-phase rectifier that constitutes by the 5th IGBT, the 6th IGBT, the 7th IGBT, the 8th IGBT, the 11 IGBT and the 12 IGBT, and output direct current; During the backward power transmission; The three-phase inverter that the 5th IGBT, the 6th IGBT, the 7th IGBT, the 8th IGBT, the 11 IGBT and the 12 IGBT constitute; The right side input is transformed to three-phase alternating current; Through said first inductance, second inductance and the 3rd inductive transmission to the rectifier that constitutes by an IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 9th IGBT and the tenth IGBT, and output direct current.
Further, according to above-mentioned Universal Switching Power Supply, wherein, the emitter of said the 2nd IGBT, the 4th IGBT and the tenth IGBT links to each other with the emitter of said the 6th IGBT, the 8th IGBT and the 12 IGBT.
Further, according to above-mentioned Universal Switching Power Supply, wherein; The gate pole of said 12 IGBT receives the pwm pulse control signal; When a said IGBT, the 3rd IGBT and the 9th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward; When the 2nd IGBT, the 4th IGBT and the tenth IGBT open shutoff with certain duty ratio, when all the other IGBT opened all the time, said translation circuit forward boosted; When the 5th IGBT, the 7th IGBT and the 11 IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the reverse step-down of said translation circuit; When the 6th IGBT, the 8th IGBT and the 12 IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward.
Therefore; The alternating voltage that Universal Switching Power Supply utilization of the present invention converts direct voltage into the translation circuit of two H bridges carries out the processing of rectification again; Thereby realize the bidirectional, dc power delivery; Its step-up ratio is high, circuit structure is simple, control is easy, output voltage stability good, meets the demand for development of little electrical network, and has project organization novelty, highly versatile, advantage such as with low cost.
Description of drawings
Fig. 1 is the circuit theory diagrams of Universal Switching Power Supply of the present invention;
Fig. 2 is the circuit theory diagrams of the bi-directional DC-DC buck-boost converter that derived by the Universal Switching Power Supply of Fig. 1;
Fig. 3 is the circuit theory diagrams of three-phase form of the Universal Switching Power Supply of Fig. 1;
Fig. 4 is the circuit theory diagrams of three-phase form of the Universal Switching Power Supply of Fig. 2.
Embodiment
Below will combine accompanying drawing that the technique effect of design of the present invention, concrete structure and generation is described further, to understand the object of the invention, characteristic and effect fully.
As shown in Figure 1, the present invention a kind ofly can boost to the 120V direct current from input with the 12V direct current and delivers to output, the 120V direct current is depressurized to the 12V direct current from input delivers to output; Or the 12V direct current is boosted to the 120V direct current from output deliver to input, the 120V direct current is depressurized to the Universal Switching Power Supply that the 12V direct current is delivered to input from output, its power grade is 2.0kW.The output that comprises first filter circuit 1, translation circuit 2 and second filter circuit, 3, the first filter circuits 1 of cascade successively links to each other with translation circuit 2 inputs, and the output of translation circuit 2 links to each other with the input of second filter circuit 3.Two outputs that terminal is a Universal Switching Power Supply of second filter circuit 2.
Send in concrete work; The gate pole of eight IGBT of the present invention receives the pwm pulse control signal; And the working method of eight IGBT is following: during the forward power transmission, an IGBT S1～the 4th IGBT S4 constitutes inverter, and DC converting is imported for exchanging in the left side; Transfer to by the rectifier that the 5th IGBT S5～the 8th IGBT S8 constitutes through first inductance L 1 and second inductance L 2, and the output direct current; During the backward power transmission, the inverter that the 5th IGBTS5～the 8th IGBTS8 constitutes is transformed to interchange with the right side input, transfer to by the rectifier that an IGBT～the 4th IGBT constitutes through first inductance L 1 and second inductance L 2, and the output direct current.Through the duty cycle of switching of control left and right sides brachium pontis, make node AB voltage and node CD voltage form the pressure reduction of plus or minus, thereby realize DC converting and bidirectional, dc power delivery.Wherein, be defined as forward, be defined as oppositely from output to input from input to output.
Particularly, when forward boosts, can the 12V direct current be boosted to the 120V direct current from input and deliver to output; During the forward step-down, can the 120V direct current be depressurized to the 12V direct current from input and deliver to output; When oppositely boosting, can the 12V direct current be boosted to the 120V direct current from output and deliver to input, during reverse step-down, can the 120V direct current be depressurized to the 12V direct current from output and deliver to input.Realize the bidirectional, dc power delivery of Universal Switching Power Supply thus.
Only negative pole between two brachium pontis of two brachium pontis in the left side among Fig. 1 and the right is connected among Fig. 2, has just constituted the DC-DC converter.Concrete working method is following: the gate pole of eight IGBT receives the pwm pulse control signal, when first and third IGBT S1, S3 open shutoff with certain duty ratio, and when all the other IGBT open all the time, translation circuit 2 forward step-downs; When second, four IGBT S2, S4 open shutoff with certain duty ratio, when all the other IGBT opened all the time, translation circuit 2 forwards boosted; When the 5th, seven IGBT S5, S7 open shutoff with certain duty ratio, when all the other IGBT open all the time, translation circuit 2 reverse step-downs; When the 6th, eight IGBT S6, S8 open shutoff with certain duty ratio, when all the other IGBT open all the time, translation circuit 2 forward step-downs.By the way, it can realize the bi-directional DC-DC buck.
Only two brachium pontis right sides increase a brachium pontis on the translation circuit left side on the basis of Fig. 1 among Fig. 3; Increase a brachium pontis on two brachium pontis right sides, translation circuit the right; Wherein the 9th IGBT S9 collector electrode links to each other with the anodal P1 of input, and its emitter links to each other with the 5th node E; The tenth IGBT S10 collector electrode links to each other with the 5th node E, and its emitter links to each other with input negative pole N1; The 11 IGBT S11 collector electrode links to each other with output cathode P2, and its emitter links to each other with the 6th node F; The 12 IGBT S12 collector electrode links to each other with the 6th node F, and its emitter links to each other with output negative pole N2.The two ends of the 3rd inductance L 3 link to each other with the 6th node F with the 5th node E respectively.Wherein, the 5th node E is the brachium pontis mid point that the 9th IGBT S9 and the tenth IGBT S10 constitute, and the 6th node F is the brachium pontis mid point that the 11 IGBT S11 and the 12 IGBT S12 constitute.
The working method of the three-phase Universal Switching Power Supply among Fig. 3 is following: the gate pole of 12 IGBT receives the pwm pulse control signal; During the forward power transmission; The one IGBT S1～the 4th IGBT S4, the 9th IGBT S9 and the tenth IGBT S10 constitute three-phase inverter; It is three-phase alternating current that DC converting is imported in the left side; Transfer to the three-phase rectifier that constitutes by the 5th IGBT S5～the 8th IGBT S8, the 11 IGBT S11 and the 12 IGBT S12 through first inductance L 1～the 3rd inductance L 3, and the output direct current; During the backward power transmission; The three-phase inverter that the 5th IGBT S5～the 8th IGBTS8, the 11 IGBT S11 and the 12 IGBT S12 constitute; The right side input is transformed to three-phase alternating current; Transfer to the rectifier that constitutes by an IGBT S1～the 4th IGBT S4, the 9th IGBT S9 and the tenth IGBT S10 through first inductance L 1～the 3rd inductance L 3, and the output direct current.Through the duty cycle of switching of control left and right sides brachium pontis, make AB voltage, EF voltage and CD voltage form the pressure reduction of plus or minus, thereby realize DC converting and bidirectional, dc power delivery.
Only negative pole between three brachium pontis of three brachium pontis in the left side among Fig. 3 and the right is connected among Fig. 4; Thereby constituted the DC-DC converter; Its working method is following: the gate pole of 12 IGBT receives the pwm pulse control signal; When first and third, nine IGBT S1, S3, S9 open shutoff with certain duty ratio, when all the other IGBT open all the time, translation circuit 2 forward step-downs; When second, four, ten IGBT S2, S4, S10 open shutoff with certain duty ratio, when all the other IGBT opened all the time, translation circuit 2 forwards boosted; When the 5th, seven, 11 IGBT S5, S7, S11 open shutoff with certain duty ratio, when all the other IGBT open all the time, translation circuit 2 reverse step-downs; When the 6th, eight, 12 IGBT S6, S8, S12 open shutoff with certain duty ratio, when all the other IGBT open all the time, translation circuit 2 forward step-downs.By the way, the present invention can realize the bi-directional DC-DC buck.
The present invention adopts Universal Switching Power Supply; Input (or output) AC voltage conversion is delivered to output (or input) for the direct voltage that raises or reduce; Can realize simultaneously the bidirectional, dc power delivery of circuit, it is simple in structure, control is easy, novel in design, can not produce current oscillation; When boosting, the two-way liftable that step-up ratio is higher than is in the past pressed converter simultaneously.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variation.Therefore, all technical staff in the art all should be in the determined protection range by claims under this invention's idea on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (8)
1. Universal Switching Power Supply; It is characterized in that; Comprise first filter circuit, translation circuit and second filter circuit; The output of said first filter circuit links to each other with the input of said translation circuit, and the output of said translation circuit links to each other with the input of said second filter circuit, two outputs that terminal is a Universal Switching Power Supply of said second filter circuit;
Wherein, said first filter circuit is a condenser network, comprises first resistance and first electrochemical capacitor, and wherein, said first resistance is steady resistance, and its two ends link to each other with the input negative pole with the input of DC power supply is anodal; Said first electrochemical capacitor is parallelly connected with said first resistance, and its positive pole links to each other with said input is anodal, and its negative pole links to each other with said input negative pole;
Said translation circuit is the translation circuit with two H bridges, comprises first inductance, second inductance and eight IGBT, and wherein, the said first inductance two ends link to each other with the 3rd node with first node respectively; The said second inductance two ends link to each other with the 4th node with Section Point respectively; The one IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said first node; The 2nd IGBT collector electrode links to each other with said first node, and its emitter links to each other with said input negative pole; The 3rd IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said Section Point; The 4th IGBT collector electrode links to each other with said Section Point, and its emitter the 5th IGBT collector electrode that links to each other with said input negative pole links to each other with the output cathode of DC power supply, and its emitter links to each other with said the 3rd node; The 6th IGBT collector electrode links to each other with said the 3rd node, and its emitter links to each other with the output negative pole of DC power supply; The 7th IGBT collector electrode links to each other with said output cathode, and its emitter links to each other with said the 4th node; The 8th IGBT collector electrode links to each other with said the 4th node, and its emitter links to each other with said output negative pole; Wherein, Said first node is the brachium pontis mid point that a said IGBT and said the 2nd IGBT constitute; Said Section Point is the brachium pontis mid point that said the 3rd IGBT and said the 4th IGBT constitute; Said the 3rd node is the brachium pontis mid point that said the 5th IGBT and said the 6th IGBT constitute, and said the 4th node is the brachium pontis mid point that said the 7th IGBT and said the 8th IGBT constitute;
Said second filter circuit is a condenser network; Comprise second resistance and second electrochemical capacitor; Wherein, the said second electrochemical capacitor positive pole links to each other with said output cathode, and its negative pole links to each other with said output negative pole; Said second resistance is steady resistance, and its two ends are parallelly connected with the said second electrochemical capacitor two ends.
2. Universal Switching Power Supply according to claim 1; It is characterized in that; The gate pole of described eight IGBT receives the pwm pulse control signal, and when forward power was transmitted, a said IGBT, the 2nd IGBT, the 3rd IGBT and the 4th IGBT constituted inverter; DC converting is imported for exchanging in the left side, through said first inductance and second inductive transmission to the rectifier that constitutes by said the 5th IGBT, the 6th IGBT, the 7th IGBT and the 8th IGBT and export direct current; During the backward power transmission; The inverter that said the 5th IGBT, the 6th IGBT, the 7th IGBT and the 8th IGBT constitute; Right side input is transformed to interchange, through said first inductance and second inductive transmission to the rectifier that constitutes by an IGBT, the 2nd IGBT, the 3rd IGBT and the 4th IGBT and export direct current.
3. Universal Switching Power Supply according to claim 1 is characterized in that, the emitter of said the 2nd IGBT and the 4th IGBT links to each other with the emitter of said the 6th IGBT and the 8th IGBT.
4. Universal Switching Power Supply according to claim 3; It is characterized in that the gate pole of described eight IGBT receives the pwm pulse control signal, when a said IGBT and the 3rd IGBT open shutoff with certain duty ratio; When all the other IGBT open all the time, the step-down of said translation circuit forward; When the 2nd IGBT and the 4th IGBT open shutoff with certain duty ratio, when all the other IGBT opened all the time, said translation circuit forward boosted; When the 5th IGBT and the 7th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the reverse step-down of said translation circuit; When the 6th IGBT and the 8th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward.
5. Universal Switching Power Supply according to claim 1 is characterized in that, said translation circuit also comprises the 9th IGBT, the tenth IGBT, the 11 IGBT, the 12 IGBT and the 3rd inductance; The 5th node is the brachium pontis mid point that said the 9th IGBT and said the tenth IGBT constitute, and the 6th node is the brachium pontis mid point that said the 11 IGBT and said the 12 IGBT constitute; Wherein, said the 9th IGBT collector electrode links to each other with said input is anodal, and its emitter links to each other with said the 5th node; The tenth IGBT collector electrode links to each other with the 5th node, and its emitter links to each other with said input negative pole; The 11 IGBT collector electrode links to each other with said output cathode, and its emitter links to each other with said the 6th node; The 12 IGBT collector electrode links to each other with said the 6th node, and its emitter links to each other with said output negative pole, and said the 3rd inductance two ends link to each other with said the 6th node with said the 5th node respectively.
6. Universal Switching Power Supply according to claim 5; It is characterized in that; The gate pole of said 12 IGBT receives the pwm pulse control signal; During the forward power transmission, a said IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 9th IGBT and the tenth IGBT constitute three-phase inverter, and it is three-phase alternating current that DC converting is imported in the left side; Through said first inductance, second inductance and the 3rd inductive transmission to the three-phase rectifier that constitutes by the 5th IGBT, the 6th IGBT, the 7th IGBT, the 8th IGBT, the 11 IGBT and the 12 IGBT, and output direct current; During the backward power transmission; The three-phase inverter that the 5th IGBT, the 6th IGBT, the 7th IGBT, the 8th IGBT, the 11 IGBT and the 12 IGBT constitute; The right side input is transformed to three-phase alternating current; Through said first inductance, second inductance and the 3rd inductive transmission to the rectifier that constitutes by an IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 9th IGBT and the tenth IGBT, and output direct current.
7. Universal Switching Power Supply according to claim 5 is characterized in that, the emitter of said the 2nd IGBT, the 4th IGBT and the tenth IGBT links to each other with the emitter of said the 6th IGBT, the 8th IGBT and the 12 IGBT.
8. Universal Switching Power Supply according to claim 7; It is characterized in that; The gate pole of said 12 IGBT receives the pwm pulse control signal; When a said IGBT, the 3rd IGBT and the 9th IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward; When the 2nd IGBT, the 4th IGBT and the tenth IGBT open shutoff with certain duty ratio, when all the other IGBT opened all the time, said translation circuit forward boosted; When the 5th IGBT, the 7th IGBT and the 11 IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the reverse step-down of said translation circuit; When the 6th IGBT, the 8th IGBT and the 12 IGBT open shutoff with certain duty ratio, when all the other IGBT open all the time, the step-down of said translation circuit forward.
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| CN106549565A (en) * | 2015-09-16 | 2017-03-29 | 通用电气公司 | Power electric device and method |
| US10137788B2 (en) | 2015-09-16 | 2018-11-27 | General Electric Company | Power electronic device and method |
| CN106549565B (en) * | 2015-09-16 | 2019-06-11 | 通用电气公司 | Power electric device and method |
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Application publication date: 20121121 |