CN103701353B - Soft switching control method of high-frequency link inverter - Google Patents
Soft switching control method of high-frequency link inverter Download PDFInfo
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- CN103701353B CN103701353B CN201310555137.9A CN201310555137A CN103701353B CN 103701353 B CN103701353 B CN 103701353B CN 201310555137 A CN201310555137 A CN 201310555137A CN 103701353 B CN103701353 B CN 103701353B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a soft switching control method of a high-frequency link inverter. A main circuit of the high-frequency link inverter comprises a DC (direct current)/DC frequency conversion module, a synchronous rectification module, a polarity selection module and an LC (inductance and capacitance) low pass filter which are sequentially connected, and a driving control module which is connected to the DC/DC frequency conversion module, the synchronous rectification module and the polarity selection module respectively. In the soft switching control method of the high-frequency link inverter, a forward power switch tube of the synchronous rectification module is controlled to be switched on before a forward power switch tube of the DC/ DC frequency conversion module is switched on, and to be switched off after the forward power switch tube of the DC/ DC frequency conversion module is switched off, and a negative power switch tube of the synchronous rectification module is controlled to be switched on before a negative power switch tube of the DC/DC frequency conversion module is switched on, and to be switched off after the negative power switch tube of the DC/DC frequency conversion module is switched off to enable the power switch tubes of the synchronous rectification module to be in a zero-voltage-on zero-current-off soft switching working mode. By the soft switching control method of the high-frequency link inverter, the switching loss of the synchronous rectification module is reduced and the efficiency and the power density of the high-frequency link inverter are increased.
Description
Technical field
The present invention relates to a kind of soft switching control method, particularly a kind of soft switching control method of high-frequency chain inverter.
Background technology
Along with the conflict of energy and environment problem is increasingly serious, inverter applications is more and more extensive.The DC power supply such as storage battery, fuel cell, photovoltaic solar directly can be converted to AC power by inverter, for power consumption equipment provides firm energy, simultaneously for improving energy conversion efficiency, to the efficiency of inverter and power density requirements more and more higher, therefore high-frequency chain inverter becomes inverter mainstream development direction.Be high-frequency chain inverter theory diagram as shown in Figure 2, be high-frequency direct-current pulse voltage by input direct voltage through DC/DC conversion module and synchronous rectification block transforms, select module and LC low pass filter by the polarity of power frequency period conducting, obtain stable alternating current.
The synchronous rectification modular power switching tube of existing high-frequency chain inverter generally adopts hard switching control method, the conducting synchronous with the power switch pipe of DC/DC conversion module of synchronous rectification modular power switching tube turns off, the power switch pipe of now synchronous rectification module is in hard switching state, switching loss can be very large, particularly during the application of switching frequency high frequency, the switching loss of switching tube is more obvious for the impact of inverter efficiency.
Soft switch technique can reduce the switching loss of power switch pipe effectively.And the scheme of existing switching tube soft switch technique is generally classified as two classes, one class increases the resonant element devices such as electric capacity, inductance and diode to open and zero-current switching to the no-voltage realizing switching tube, another kind of is increase auxiliary power switching tube to carry out controlling (as shown in Figure 1), trigger resonant capacitance and resonant inductance and carry out resonance, thus make master power switch pipe realize no-voltage to open or zero-current switching.These existing soft switch techniques are all realized by increase extra resonant circuit or resonant element, and inverter volume is increased, and cost increases, and control difficulty simultaneously and strengthen, reduce reliability and the power density of inverter.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, under providing a kind of prerequisite not increasing extra resonance components and parts, reducing the switching loss of synchronous rectification module, improving the efficiency of high-frequency chain inverter and the soft switching control method of power density.
For achieving the above object, technical scheme of the present invention is: a kind of soft switching control method of high-frequency chain inverter, the major loop of described high-frequency chain inverter comprises the DC/DC conversion module, synchronous rectification module, polarity selection module and the LC low pass filter that connect successively, the major loop of described high-frequency chain inverter is also provided with a drive control module, be connected to DC/DC conversion module, synchronous rectification module and polarity respectively and select module, it is characterized in that:
Described drive control module produces two groups of SPWM replaced and drives wavelength-division not deliver to forward power switching tube and the negative sense power switch pipe of DC/DC conversion module;
Described drive control module produces the forward power switching tube and negative sense power switch pipe that drive two of ripple complementation groups to drive wavelength-division not deliver to corresponding synchronous rectification module with described two groups of SPWM;
The power frequency that described drive control module also produces two groups of complementations drives ripple to deliver to polarity selection module;
The forward power switching tube that the forward power switching tube that described method is specially control synchronization rectification module is ahead of described DC/DC conversion module is open-minded, and the forward power switching tube lagging behind described DC/DC conversion module turns off; The negative sense power switch pipe that the negative sense power switch pipe controlling described synchronous rectification module is ahead of described DC/DC conversion module is open-minded, the negative sense power switch pipe lagging behind described DC/DC conversion module turns off, and the power switch pipe realizing synchronous rectification module is in the Sofe Switch mode of operation that no-voltage opens zero-current switching.
Further, two groups of SPWM of the described forward power switching tube being sent to DC/DC conversion module and negative sense power switch pipe drive ripples, are to drive ripple alternately to split generation one group of complete SPWM.
In one embodiment, described DC/DC conversion module is for recommending boost type DC/DC conversion module, and the forward power switching tube of described DC/DC conversion module is for recommending the upper pipe of boosting, and the negative sense power switch pipe of DC/DC conversion module rises pressure down pipe for recommending; Described synchronous rectification module is bridge synchronization rectification module.
It is to be noted that the DC/DC change module in the present invention is not limited to recommend boost type DC/DC conversion module, can be single-ended reverse exciting conversion module, single-end ortho-exciting conversion module, wherein forward power switching tube and negative sense power switch pipe are same power switch pipe, by sequential, make the single power switch pipe of control in different phase successively alternately as forward power switching tube and negative sense power switch pipe; Also can be that semibridge system DC/DC changes module, full-bridge type DC/DC changes module etc.
In one embodiment, described synchronous rectification module is bridge synchronization rectification module, and synchronous rectification module of the present invention is not limited to bridge synchronization rectification module.
Further, described recommend boost type DC/DC conversion module comprise be connected in series recommend the upper pipe of boosting, clamp capacitor, recommend and rise pressure down pipe, also comprise a transformer, describedly recommend the forward power switching tube that the upper pipe of boosting is DC/DC conversion module, recommend and rise the negative sense power switch pipe that pressure down pipe is DC/DC conversion module, described source electrode of recommending the upper pipe of boosting connects the second armature winding Same Name of Ends of clamp capacitor one end and transformer, describedly recommend the first armature winding different name end that the drain electrode of pipe on boosting pipe connects transformer, describedly recommend the drain electrode of pipe under boosting pipe and connect the first armature winding Same Name of Ends of the clamp capacitor other end and transformer, describedly recommend the source electrode of pipe under boosting pipe and connect the second armature winding different name end of transformer.
Further, described bridge synchronization rectification module is connected in parallel by the first power switch pipe group and the second power switch pipe group and forms; described first power switch pipe group is connected in series by the first power switch pipe and the second power switch pipe, second power switch pipe group is connected in series by the 3rd power switch pipe and the 4th power switch pipe, wherein the first power switch pipe and the 4th power switch pipe are forward power switching tube, second power switch pipe and the 3rd power switch pipe are negative sense power switch pipe, the drain electrode of described first power switch pipe is connected as an output of bridge synchronization rectification module with the drain electrode of the 3rd power switch pipe, the source electrode of described second power switch pipe is connected as another output of bridge synchronization rectification module with the source electrode of the 4th power switch pipe, the source electrode of described first power switch pipe is connected to the input of one end as bridge synchronization rectification module of the drain electrode of the second power switch pipe and the secondary winding of transformer, the source electrode of described 3rd power switch pipe is connected to the other end another input as bridge synchronization rectification module of the drain electrode of the 4th power switch pipe and the secondary winding of transformer.
Further, described polarity selection module the 3rd power switch pipe group and the 4th power switch pipe group are connected in parallel and form; Described 3rd power switch pipe group is connected in series by the 5th power switch pipe and the 6th power switch pipe, 4th power switch pipe group is connected in series by the 7th power switch pipe and the 8th power switch pipe, and the tie point of described 5th power switch pipe and the 6th power switch pipe and the tie point of the 7th power switch pipe and the 8th power switch pipe select the output of module respectively as polarity; The 5th described power switch pipe and the tie point of the 7th power switch pipe select the first input end of module as polarity, and the tie point of the 6th power switch pipe and the 8th power switch pipe selects the second input of module as polarity.
Further, the drain electrode of described 5th power switch pipe is connected to the drain electrode of the first power switch pipe and the drain electrode of the 3rd power switch pipe with the drain electrode of the 7th power switch pipe, the source electrode of described 6th power switch pipe is connected to the source electrode of the second power switch pipe and the source electrode of the 4th power switch pipe with the source electrode of the 8th power switch pipe, the source electrode of described 5th power switch pipe drains with the 6th power switch pipe and is connected, and the source electrode of described 7th power switch pipe is connected with the drain electrode of the 8th power switch pipe.
Further, the course of work of recommending boost type DC/DC conversion module and bridge synchronization rectification module described in is divided into four-stage capable of circulation:
First stage: recommend the upper pipe of boosting and be in off state, recommend and rise pressure down pipe in first stage initial time shutoff, second power switch pipe and the 3rd power switch pipe are all in conducting state, first power switch pipe and the 4th power switch pipe are in first stage initial time conducting, turn-on instant voltage is zero, realizes no-voltage open-minded;
Second stage: recommend the upper pipe of boosting in the conducting of second stage initial time, recommend and rise pressure down pipe maintenance shutoff, first power switch pipe and the 4th power switch pipe keep conducting, second power switch pipe and the 3rd power switch pipe turn off at second stage initial time, cut-off current is zero, realizes zero-current switching;
Phase III: recommend the upper pipe of boosting and turn off at phase III initial time, recommend and rise pressure down pipe maintenance shutoff, first power switch pipe and the 4th power switch pipe keep conducting, second power switch pipe and the 3rd power switch pipe are in phase III initial time conducting, turn-on instant voltage is zero, realizes no-voltage open-minded;
Fourth stage: recommend the upper pipe of boosting and keep turning off, recommend and rise pressure down pipe in the conducting of fourth stage initial time, second power switch pipe and the 3rd power switch pipe keep conducting, first power switch pipe and the 4th power switch pipe turn off at fourth stage initial time, turning off moment electric current is zero, realizes zero-current switching.
Further, described LC low pass filter is formed by connecting by inductance and capacitances in series.
Compared to prior art, the present invention has following beneficial effect:
1, soft switching control method of the present invention does not increase by extra the shutoff that auxiliary element realizes power switch pipe;
2, reduce the switching loss of power switch pipe, improve inversion efficiency and power density;
3, reduce high frequency E MI interference, improve the reliability of whole digital control inversion system.
Accompanying drawing explanation
Fig. 1 is the exemplary plot that traditional increase auxiliary element realizes Sofe Switch control technology.
Fig. 2 is high-frequency chain inverter theory diagram.
Fig. 3 is the high-frequency chain inverter schematic diagram in the present invention one specific embodiment.
Fig. 4 is the work-based logic sequential chart of the present invention one specific embodiment medium-high frequency chain inverter power switch pipe.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
As shown in Figure 2, the invention provides a kind of soft switching control method of high-frequency chain inverter, the major loop of described high-frequency chain inverter comprises the DC/DC conversion module, synchronous rectification module, polarity selection module and the LC low pass filter that connect successively, the major loop of described high-frequency chain inverter is also provided with a drive control module, be connected to DC/DC conversion module, synchronous rectification module and polarity respectively and select module, it is characterized in that:
The described drive control module two groups of SPWM produced alternately drive ripple to deliver to forward power switching tube and the negative sense power switch pipe of DC/DC conversion module;
Described drive control module produces the forward power switching tube and negative sense power switch pipe that drive two of ripple complementation groups to drive ripple to deliver to corresponding synchronous rectification module with described two groups of SPWM;
The power frequency that described drive control module also produces two groups of complementations drives ripple to deliver to polarity selection module;
The forward power switching tube that the forward power switching tube that described method is specially control synchronization rectification module is ahead of described DC/DC conversion module is open-minded, and the forward power switching tube lagging behind described DC/DC conversion module turns off; The negative sense power switch pipe that the negative sense power switch pipe controlling described synchronous rectification module is ahead of described DC/DC conversion module is open-minded, the negative sense power switch pipe lagging behind described DC/DC conversion module turns off, and the power switch pipe realizing synchronous rectification module is in the Sofe Switch mode of operation that no-voltage opens zero-current switching.
It is below the specific embodiment of the invention.
As shown in the high-frequency chain inverter schematic diagram in Fig. 3 the present invention one specific embodiment, major loop by recommending boost type DC/DC conversion module, bridge synchronization rectification module, polarity selects module, LC low pass filter to connect and compose successively, wherein DC/DC conversion module, synchronous rectification module, polarity select the control signal of module to be connected to a drive control module respectively, wherein recommend boost type DC/DC conversion module by recommending the upper pipe MOS1 of boosting, recommend rise pressure down pipe MOS2, clamp capacitor C2, transformer T1 forms; Bridge synchronization rectification module is made up of power switch pipe MOS11, power switch pipe MOS12, power switch pipe MOS21 and power switch pipe MOS22; Polarity selects module to be made up of power switch pipe MOS41, power switch pipe MOS42, power switch pipe MOS51, power switch pipe MOS52; LC low pass filter is made up of inductance L 1 and electric capacity C1.
Described source electrode of recommending pipe MOS1 on boosting pipe connects the second armature winding Same Name of Ends of clamp capacitor C2 one end, transformer T1, the drain electrode of described power switch pipe MOS1 connects the first armature winding different name end of transformer T1, describedly recommend the drain electrode of pipe MOS2 under boosting pipe and connect the first armature winding Same Name of Ends of the clamp capacitor C2 other end, transformer T1, described in recommend the source electrode of pipe MOS2 under boosting pipe and connect the second armature winding different name end of transformer T1, the drain electrode of described power switch pipe MOS11, the drain electrode of power switch pipe MOS21, the drain electrode of power switch pipe MOS41, the drain electrode of power switch pipe MOS51 is connected, the source electrode of described power switch pipe MOS22, the source electrode of power switch pipe MOS12, the source electrode of power switch pipe MOS51, the source electrode of power switch pipe MOS41 is connected, the source electrode of described power switch pipe MOS11 is connected to the drain electrode of power switch pipe MOS22, one end of the secondary winding of transformer T1, the source electrode of described power switch pipe MOS21 is connected to the drain electrode of power switch pipe MOS12, the other end of the secondary winding of transformer T1, the source electrode of described power switch pipe MOS41 is connected to the drain electrode of power switch pipe MOS52, the source electrode of described power switch pipe MOS51 is connected to the drain electrode of power switch pipe MOS42.
Described drive control module, drives ripple alternately to split one group of complete SPWM, produces two groups of SPWM replaced and drives ripples to deliver to the power switch pipe MOS1 and power switch pipe MOS2 that recommend boost type DC/DC conversion module;
Described drive control module, produces one group and drives complementary driving ripple to deliver to power switch pipe MOS21 and the power switch pipe MOS22 of bridge synchronization rectification module with the SPWM recommending the upper pipe MOS1 that boosts;
Described drive control module, produce one group with recommend the SPWM rising pressure down pipe MOS2 and drive complementary driving ripple to deliver to power switch pipe MOS11 and the power switch pipe MOS12 of bridge synchronization rectification module;
Described drive control module, the power frequency period producing two groups of complementations drives wavelength-division not deliver to power switch pipe MOS41, MOS42 and power switch pipe MOS51, MOS52 of bridge-type polarity selecting circuit.
Whole circuit working principle is as follows:
Power switch pipe MOS1, power switch pipe MOS11, power switch pipe MOS12, electric capacity C2 and transformer T1 form forward boost rectifying circuit, power switch pipe MOS2, power switch pipe MOS21, power switch pipe MOS22, electric capacity C2 and transformer T1 form negative sense boost rectifying circuit, input direct voltage is transformed into high-frequency direct-current pulse voltage, high-frequency direct-current pulse voltage selects the alternating voltage of module and LC low pass filter stable output through polarity.
Wherein recommending the upper pipe MOS1 of boosting is the forward power switching tube that DC/DC changes module, recommending and rising pressure down pipe MOS2 is that DC/DC changes the negative sense power switch pipe of module, power switch pipe MOS11, MOS12 are synchronous rectification module forward power switching tube, and power switch pipe MOS21, MOS22 are synchronous rectification module negative sense power switch pipe.
Wherein at boost rectifying circuit, control rectification module power switch pipe MOS11 and power switch pipe MOS12 and be ahead of that to recommend the upper pipe MOS1 of boosting open-minded, lag behind and recommending the upper pipe MOS1 of boosting and turn off, control power switch pipe MOS21 and power switch pipe MOS22 to be ahead of and to recommend that to rise pressure down pipe MOS2 open-minded, lag behind to recommend and rise pressure down pipe MOS2 and turn off, the power switch pipe of bridge synchronization rectification module works in the Sofe Switch pattern that no-voltage opens zero-current switching.
Accompanying drawing 4 is for recommending the work-based logic sequential chart of boost type DC/DC conversion module and each power switch pipe of bridge synchronization rectification module, wherein recommending the upper pipe MOS1 of boosting and recommending the driving ripple rising pressure down pipe MOS2 is that the SPWM mutually replaced drives, the power switch pipe MOS11 of bridge synchronization rectification module, the driving ripple of power switch pipe MOS12 with recommend the SPWM rising pressure down pipe MOS2 and drive complementation, the power switch pipe MOS21 of bridge synchronization rectification module, the driving ripple of power switch pipe MOS22 and recommend the SPWM going up pipe MOS1 that boosts and drive complementation.
The course of work of recommending boost type DC/DC conversion module and bridge synchronization rectification module is divided into four operation intervals capable of circulation:
[1] in [t0, the t1] period:
---recommend the upper pipe MOS1 of boosting and keep off state;
---recommend and rise pressure down pipe MOS2 and turn off in the t0 moment and keep off state;
---bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 is in t0 moment conducting and keep conducting state;
---bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 keeps conducting state.
Rise pressure down pipe MOS2 be all in off state because recommending the upper pipe MOS1 of boosting and recommending, then the secondary output end voltage of transformer is zero, and the power switch pipe MOS11 of synchronous rectification module and power switch pipe MOS12 is in t0 moment conducting, realize no-voltage open-minded, for the energy transferring of next stage is ready in advance.
[2] in [t1, the t2] period:
---recommending boosting upper pipe MOS1 in t1 moment conducting and keeping conducting state;
---recommend and rise pressure down pipe MOS2 maintenance off state;
---bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 keeps conducting state;
---bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 turns off in the t1 moment and keeps off state.
Recommend the upper pipe MOS1 of boosting when t1 moment conducting, corresponding bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 is ahead of and recommends the upper pipe MOS1 of boosting in t0 moment conducting, by recommending boosting, above pipe MOS1 and bridge synchronization rectification mould power switch pipe MOS11, MOS12 carry out forward boosting rectification, output high-frequency direct-current pulse voltage to input dc power.
Rise pressure down pipe MOS2 and keep off state because recommending in t1 ~ t2 period, then the negative sense rectification circuit electric current of bridge synchronization rectification module is zero, and bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 turned off in the t1 moment, realize zero-current switching.
[3] in [t2, the t3] period:
---recommend the upper pipe MOS1 of boosting and turn off in the t2 moment and keep off state;
---recommend and rise pressure down pipe MOS2 maintenance off state;
---bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 keeps conducting state;
---bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 is in t2 moment conducting and keep conducting state.
Rise pressure down pipe MOS2 be all in off state because recommending the upper pipe MOS1 of boosting and recommending, then the secondary output end voltage of transformer is zero, and the power switch pipe MOS21 of synchronous rectification module and power switch pipe MOS22 is in t2 moment conducting, realize no-voltage open-minded, for the energy transferring of next stage is ready in advance.
[4] in [t3, the t4] period:
---recommend the upper pipe MOS1 of boosting and keep off state;
---recommend and rise pressure down pipe MOS2 in t3 moment conducting and keep conducting state;
---bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 turns off in the t3 moment and keeps off state;
---bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 keeps conducting state.
Recommend and rise pressure down pipe MOS2 when t3 moment conducting, corresponding bridge synchronization rectification modular power switching tube MOS21 and power switch pipe MOS22 is ahead of to recommend and rises pressure down pipe MOS2 in t2 moment conducting, input dc power rises pressure down pipe MOS2 and bridge synchronization rectification modular power switching tube MOS21, MOS22 carry out negative sense boosting rectification by recommending, and exports high-frequency direct-current pulse voltage.
Off state is kept in t3 ~ t4 period because recommending the upper pipe MOS1 of boosting, then the forward rectification circuit electric current of bridge synchronization rectification module is zero, and bridge synchronization rectification modular power switching tube MOS11 and power switch pipe MOS12 turned off in the t3 moment, realize zero-current switching.
Wherein, t0 ~ t4 is one of high-frequency chain inverter boosting rectification duty cycle control cycle, is in the Sofe Switch mode of operation that no-voltage opens zero-current switching recommending the power switch pipe logical sequence between boost type DC/DC conversion module and bridge synchronization rectification module realizing bridge synchronization rectification module.
The foregoing is only preferred embodiment of the present invention; the object, technical solutions and advantages of the present invention are further described; not in order to limit the present invention; within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the soft switching control method of a high-frequency chain inverter, the major loop of described high-frequency chain inverter comprises the DC/DC conversion module, synchronous rectification module, polarity selection module and the LC low pass filter that connect successively, the major loop of described high-frequency chain inverter is also provided with a drive control module, be connected to DC/DC conversion module, synchronous rectification module and polarity respectively and select module, it is characterized in that:
Described drive control module produces two groups of SPWM replaced and drives wavelength-division not deliver to forward power switching tube and the negative sense power switch pipe of DC/DC conversion module;
Described drive control module produces the forward power switching tube and negative sense power switch pipe that drive two of ripple complementation groups to drive wavelength-division not deliver to corresponding synchronous rectification module with described two groups of SPWM;
The power frequency that described drive control module also produces two groups of complementations drives ripple to deliver to polarity selection module;
The forward power switching tube that the forward power switching tube that described method is specially control synchronization rectification module is ahead of described DC/DC conversion module is open-minded, and the forward power switching tube lagging behind described DC/DC conversion module turns off; The negative sense power switch pipe that the negative sense power switch pipe controlling described synchronous rectification module is ahead of described DC/DC conversion module is open-minded, the negative sense power switch pipe lagging behind described DC/DC conversion module turns off, and the power switch pipe realizing synchronous rectification module is in the Sofe Switch mode of operation that no-voltage opens zero-current switching;
Described DC/DC conversion module is for recommending boost type DC/DC conversion module, and described synchronous rectification module is bridge synchronization rectification module, described recommend boost type DC/DC conversion module comprise be connected in series recommend the upper pipe of boosting, clamp capacitor, recommend and rise pressure down pipe, also comprise a transformer, describedly recommend the forward power switching tube that the upper pipe of boosting is DC/DC conversion module, recommend and rise the negative sense power switch pipe that pressure down pipe is DC/DC conversion module, described source electrode of recommending the upper pipe of boosting connects the second armature winding Same Name of Ends of clamp capacitor one end and transformer, described drain electrode of recommending the upper pipe of boosting connects the first armature winding different name end of transformer, describedly recommend the first armature winding Same Name of Ends that the drain electrode rising pressure down pipe connects the clamp capacitor other end and transformer, describedly recommend the second armature winding different name end that the source electrode rising pressure down pipe connects transformer, described bridge synchronization rectification module is connected in parallel by the first power switch pipe group and the second power switch pipe group and forms, described first power switch pipe group is connected in series by the first power switch pipe and the second power switch pipe, second power switch pipe group is connected in series by the 3rd power switch pipe and the 4th power switch pipe, wherein the first power switch pipe and the 4th power switch pipe are forward power switching tube, second power switch pipe and the 3rd power switch pipe are negative sense power switch pipe, the drain electrode of described first power switch pipe is connected as an output of bridge synchronization rectification module with the drain electrode of the 3rd power switch pipe, the source electrode of described second power switch pipe is connected as another output of bridge synchronization rectification module with the source electrode of the 4th power switch pipe, the source electrode of described first power switch pipe is connected to the input of one end as bridge synchronization rectification module of the drain electrode of the second power switch pipe and the secondary winding of transformer, the source electrode of described 3rd power switch pipe is connected to the other end another input as bridge synchronization rectification module of the drain electrode of the 4th power switch pipe and the secondary winding of transformer,
The described course of work of recommending boost type DC/DC conversion module and bridge synchronization rectification module is divided into four-stage capable of circulation:
First stage: recommend the upper pipe of boosting and be in off state, recommend and rise pressure down pipe in first stage initial time shutoff, second power switch pipe and the 3rd power switch pipe are all in conducting state, first power switch pipe and the 4th power switch pipe are in first stage initial time conducting, turn-on instant voltage is zero, realizes no-voltage open-minded;
Second stage: recommend the upper pipe of boosting in the conducting of second stage initial time, recommend and rise pressure down pipe maintenance shutoff, first power switch pipe and the 4th power switch pipe keep conducting, second power switch pipe and the 3rd power switch pipe turn off at second stage initial time, cut-off current is zero, realizes zero-current switching;
Phase III: recommend the upper pipe of boosting and turn off at phase III initial time, recommend and rise pressure down pipe maintenance shutoff, first power switch pipe and the 4th power switch pipe keep conducting, second power switch pipe and the 3rd power switch pipe are in phase III initial time conducting, turn-on instant voltage is zero, realizes no-voltage open-minded;
Fourth stage: recommend the upper pipe of boosting and keep turning off, recommend and rise pressure down pipe in the conducting of fourth stage initial time, second power switch pipe and the 3rd power switch pipe keep conducting, first power switch pipe and the 4th power switch pipe turn off at fourth stage initial time, turning off moment electric current is zero, realizes zero-current switching.
2. the soft switching control method of high-frequency chain inverter according to claim 1, it is characterized in that: two groups of SPWM of the described forward power switching tube being sent to DC/DC conversion module and negative sense power switch pipe drive ripples, is drive ripple alternately to split generation one group of complete SPWM.
3. the soft switching control method of high-frequency chain inverter according to claim 1, is characterized in that: described polarity selection module the 3rd power switch pipe group and the 4th power switch pipe group are connected in parallel and form; Described 3rd power switch pipe group is connected in series by the 5th power switch pipe and the 6th power switch pipe, 4th power switch pipe group is connected in series by the 7th power switch pipe and the 8th power switch pipe, and the tie point of described 5th power switch pipe and the 6th power switch pipe and the tie point of the 7th power switch pipe and the 8th power switch pipe select the output of module respectively as polarity; The 5th described power switch pipe and the tie point of the 7th power switch pipe select the first input end of module as polarity, and the tie point of the 6th power switch pipe and the 8th power switch pipe selects the second input of module as polarity.
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| CN1665115A (en) * | 2004-11-22 | 2005-09-07 | 深圳普达电源技术有限公司 | A high-efficiency zero-voltage switch type DC power transformer |
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| JP4790826B2 (en) * | 2009-03-10 | 2011-10-12 | 株式会社日立製作所 | Power supply device and hard disk device |
| US8564984B2 (en) * | 2010-12-10 | 2013-10-22 | Futurewei Technologies, Inc. | Soft switching DC/DC converters and methods |
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| CN1665115A (en) * | 2004-11-22 | 2005-09-07 | 深圳普达电源技术有限公司 | A high-efficiency zero-voltage switch type DC power transformer |
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| CN103701353A (en) | 2014-04-02 |
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