CN1299179A - Soft switching method for power switching transistor of DC converter and soft-switching DC converter - Google Patents
Soft switching method for power switching transistor of DC converter and soft-switching DC converter Download PDFInfo
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- CN1299179A CN1299179A CN00136884A CN00136884A CN1299179A CN 1299179 A CN1299179 A CN 1299179A CN 00136884 A CN00136884 A CN 00136884A CN 00136884 A CN00136884 A CN 00136884A CN 1299179 A CN1299179 A CN 1299179A
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Abstract
The invention can realize zero-voltage zere-current switching on and zero-voltage switching off for main power switch, zero-current switching on and zero-voltage zero-current switching off for auxiliary switch as well as zero-voltage switching off for commutation diode by adding auxiliary resonant circuit to adapt antiparallel diode and charge-discharge capacitor, as well as utilizing resonant characteristic of the circuit and the characteristic that the current of inductance and the voltage of capacitor can not suddenly change to switch on or off the main or auxiliary power switching tube by selecting an opportune moment.
Description
The present invention relates to a kind of soft-switching process and soft switch DC converter of DC converter power switch pipe, these DC converter comprise boost type (Boost), buck (BUCK), step-down/up type Buk/Boost), Qiu Keshi (CUK), single ended primary induction formula (SEPIC) and Saite (ZETA) formula converter etc.
PWM-type (PWM) boost inverter is widely used in DC-DC conversion and power factor correction (PFC) circuit.Particularly inductive current continuous mode (CCM) is most widely used in pfc circuit.But basic boost type circuit as shown in Figure 1 exists the switching loss of power switch S and the reverse-recovery problems of power diode D.In recent years, people have proposed some zero voltage transition (ZVT) boost inverter and have solved the problems referred to above that exist in the basic boost inverter, document [1] for example: document [2]: document [3]: document [4]: document [5]:, respectively as Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6.All these converter topology circuit are additional on the main circuit by an auxiliary circuit, realize that the no-voltage of main switch is opened (ZVS).Circuit auxiliary switch Sa shown in Figure 2 opens for hard (non-zero current), (non-zero voltage) shutoff firmly, and power diode D is that hard (non-zero voltage) turn-offs; Circuit auxiliary switch Sa shown in Figure 3 is that hard (non-zero voltage) turn-offs; Circuit auxiliary switch Sa shown in Figure 4 is that hard (non-zero voltage) turn-offs; Circuit shown in Figure 5 has realized that the ZVS of master power switch S turns on and off, and the zero current turning-on (ZCS) of auxiliary power switch S a and ZVS turn-off, and the ZVS of rectifier diode D turn-offs.Circuit shown in Figure 6 is on the basis of Fig. 5 circuit, has increased a transformer T and two diode D1, D2, and purpose is the circulating energy that reduces in the auxiliary circuit, thereby reduces the loss and the stress of power tube.But these schemes can not realize in the lump that all the zero-voltage zero-current (being called for short ZVZCS) of master power switch S is opened and no-voltage (ZVS) is turn-offed, the zero current (ZCS) of auxiliary power switch S a is opened and zero-voltage current (ZVZCS) turn-offs, the no-voltage (ZVS) of rectifier diode is turn-offed.
Purpose of the present invention is exactly in order to overcome the above problems, a kind of soft-switching process and soft switch DC converter of DC converter power switch pipe are provided, and the zero-voltage zero-current of realizing master power switch is in the lump opened with no-voltage and is turn-offed, the zero current turning-on of auxiliary power switch and zero-voltage current turn-offs, the no-voltage of rectifier diode is turn-offed.
For achieving the above object, the present invention proposes a kind of soft-switching process and soft switch DC converter of DC converter power switch pipe.
Wherein, the feature of the soft-switching process of described DC converter power switch pipe is: increase auxiliary power switching tube, resonant capacitance, resonant inductance, three and master power switch pipe constitute resonant tank; Diode of reverse parallel connection respectively on main and auxiliary assist rate switching tube, and on the master power switch pipe charge and discharge capacitance in parallel; The characteristic of utilizing the resonance characteristic of above-mentioned resonant tank, characteristic that the resonant inductance electric current can not suddenly change and charge and discharge capacitance voltage not to suddenly change, and control main and auxiliary assist rate switching tube by pulse-width modulation circuit and periodically turn on and off, the zero-voltage current of realizing the master power switch pipe is opened, no-voltage is closed, the zero current of auxiliary power switching tube is opened, zero-voltage current closes, and the no-voltage of rectifier diode is closed.
Correspondingly, described soft switch DC converter comprises input DC power, output DC source, energy storage inductor, master power switch pipe, auxiliary power switching tube, rectifier diode, it is characterized in that: resonant capacitance of series connection on auxiliary power switching tube branch road, and a resonant inductance also is set in circuit, and described resonant capacitance, resonant inductance and main and auxiliary assist rate switching tube constitute the resonant tank of a closure; Inverse parallel diode of difference reverse parallel connection on described main and auxiliary assist rate switching tube, charge and discharge capacitance also in parallel on the master power switch pipe.
Owing to adopted above scheme, increased auxiliary resonant circuit, cooperate inverse parallel diode, charge and discharge capacitance again, utilize the resonance characteristic of circuit, and the characteristics that the electric current of inductance can not suddenly change, the voltage of electric capacity can not suddenly change, select to open and close suitable opportunity main and auxiliary assist rate switching tube, the zero-voltage zero-current that can realize master power switch is in the lump opened with no-voltage and is turn-offed, the zero current turning-on of auxiliary power switch and zero-voltage current turn-offs, the no-voltage of rectifier diode is turn-offed.
Fig. 1 is basic boost inverter schematic circuit.
Fig. 2 is the ZVT schematic circuit that proposes in the document [1].
Fig. 3 is the ZVT schematic circuit that proposes in the document [2].
Fig. 4 is the ZVT schematic circuit that proposes in the document [3].
Fig. 5 is the ZVT schematic circuit that proposes in the document [4].
Fig. 6 is the ZVT schematic circuit that proposes in the document [5].
Fig. 7 is a kind of step-up switch DC-DC converter principle circuit that this paper proposes.
Fig. 8 is the another kind of step-up switch DC-DC converter principle circuit that this paper proposes
Fig. 9 (a)-9 (h) is eight kinds of interior mode of operations of a switch periods of Fig. 7.
Figure 10 is the main waveform in the switch periods.
Figure 11 is one of power factor correction schematic circuit of using this programme.
Figure 12 be use this programme the power factor correction schematic circuit two.
Figure 13 is a decompression transducer schematic circuit of using this programme.
Figure 14 is a step-down/up type converter principle circuit of using this programme.
Figure 15 is a Qiu Keshi converter principle circuit of using this programme.
Figure 16 is single ended primary induction formula converter (SEPIC) schematic circuit of using this programme.
Figure 17 is Saite (Zeta) formula converter principle circuit of using this programme.
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
DC converter has polytype, as boost type, step-down (Buck) formula, buck (Buck/Boost) formula, mound gram (Cuk) formula, single ended primary induction formula (SEPIC, Single EndedPrimary Inductance Converter) formula and Saite (Zeta) formula etc.The basic circuit of all these converters all comprises input dc power potential source (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), rectifier diode (D).In order to realize soft switch, also need increase auxiliary power switching tube (Sa).In order to simplify description, below be example with the boost inverter earlier, present invention is described.
Embodiment one: Fig. 1-the 12nd, the various schematic diagrames of the soft-switching process of step-up switch DC converter and power switch pipe thereof.Its basic principle is on the basis of basic boost type circuit shown in Figure 1, an additional auxiliary circuit.Auxiliary circuit is made up of an auxiliary power switching tube, a resonant capacitance and a resonant inductance.As previously mentioned, Fig. 2-the 6th, scheme used in the prior art.
In different DC converter, the annexation difference of described input dc power potential source Vin, output DC source, energy storage inductor Lf, master power switch pipe S, rectifier diode D.In the boost type DC converter of Fig. 1, described energy storage inductor Lf is connected on the major loop, one termination input dc power potential source Vin anode; Rectifier diode D also is connected on the major loop, and its negative electrode connects output; Described master power switch pipe S cross-over connection in parallel is on major loop, and its control end links to each other with pulse-width modulation circuit respectively.
Fig. 7 is a kind of step-up switch DC-DC converter principle circuit that this paper proposes, and wherein increases auxiliary power switching tube Sa branch road, and is in parallel with master power switch pipe S branch road, but near energy storage inductor Lf end, its control end also links to each other with pulse-width modulation circuit.On the major loop, increase resonant inductance Lr between two power switch tube S, Sa branch road, its termination energy storage inductor Lf, the anode of another termination rectifier diode D; The resonant capacitance Cr that connects on auxiliary power switching tube Sa branch road, one are terminated between resonant inductance Lr and the energy storage inductor Lf, another termination auxiliary power switching tube Sa.
Fig. 8 is the another kind of step-up switch DC-DC converter principle circuit that this paper proposes, and is the improvement circuit on Fig. 7 circuit base.It is characterized in that also being provided with transformer T and two and present diode D1, D2 in circuit, the former limit of described transformer T is series on the auxiliary power switching tube Sa branch road, and one is terminated between resonant inductance Lr and the energy storage inductor Lf, another termination resonant capacitance Cr; Its secondary has three taps, and wherein the tap at two ends is connected to two anodes of presenting diode D1, D2 respectively, and centre cap is connected to the load negative terminal; After linking, two negative electrodes of presenting diode D1, D2 are connected to the load anode.The loss of auxiliary circuit and stresses of parts can reduce by the circulating energy that reduces auxiliary circuit.The purpose that increases transformer T, diode D1, D2 is to provide a passage that is fed to load for the part circulating energy.Because when auxiliary circuit is worked, electric current can flow to load by D1, D2, so this passage always exists.When the electric current forward flow in the auxiliary circuit, set up a voltage on the former limit of transformer T, set up a voltage simultaneously at its secondary simultaneously, this voltage makes the D1 conducting; Otherwise, when the reverse direction current flow in the auxiliary circuit, the D2 conducting.Under above situation, the original edge voltage of transformer T is clamped at the VO/N value, and wherein VO is the converter output voltage, and N is the turn ratio of the former secondary of transformer T.
Two kinds of circuit basic functional principle that propose in view of this programme are identical, and the existing just operation principle of Fig. 7 is introduced, and the operation principle of Fig. 8 is omitted.
Shown in Fig. 9 (a) and (b), (c), (d), (e), (f), (g), (h), in a switch periods, eight kinds of mode of operations are arranged, be actually eight working stages in the one-period, in conjunction with the main waveform diagram in the switch periods shown in Figure 10, as follows to eight kinds of mode of operation divisions:
Pattern 1: Fig. 9 (a), t＜t0 (moment that auxiliary power switching tube Sa opens is defined as t0) stage is before promptly one-period begins.Master power switch pipe S and auxiliary power switching tube Sa all turn-off, and electric current flows to load by diode D.The capacitor C r of auxiliary circuit is reversed charging, and its voltage is Vcr0.
Pattern 2: Fig. 9 (b), [t0-t1] (electric current by Lr and D be reduced to moment of zero be defined as t1) stage.During t=t0, open auxiliary power switching tube Sa.Because the electric current of energy storage inductor Lf and resonance inductance L r all can not be undergone mutation, thus the auxiliary power switching tube to open the electric current of moment be zero.Thereby realized the ZCS that auxiliary power switching tube Sa opens.Simultaneously, the existence of Lr makes that the electric current in the diode can not suddenly change, and can only reduce gradually, thereby guarantee the soft shutoff of diode D, has promptly realized the ZVS shutoff.In this stage, the electric current by Lr and D reduces gradually, and the electric current by Sa increases gradually, and promptly electric current shifts to auxiliary circuit.To this stage end, the electric current by Sa reaches input current value Ii, and resonant capacitance Cr both end voltage is Vcr1.
Mode 3: Fig. 9 (c), [t1-t2] (master power switch pipe S voltage Vs is defined as t2 when being zero) stage.During t=t1, the electric current by Lr and D is reduced to zero, and capacitor C s begins by Lr, Cr and Sa discharge.Simultaneously, starting from scratch by the electric current of Lr oppositely increases, and the electric current by Sa also will increase.When finishing to this stage, the electric charge on the Cs all discharges, and promptly master power switch pipe both end voltage reduces to zero by VO; Resonant capacitance Cr both end voltage is designated as Vcr2.
Pattern 4: Fig. 9 (d), [t2-t3] (when reducing to zero, being defined as t3) stage by the electric current of Lr.After t=t2, the inverse parallel diode of master power switch pipe S begins conducting, has guaranteed that the S both end voltage is zero.Can open master power switch pipe S in this stage, thereby realize the ZVZCS that S opens.This reduces to zero by the electric current of Lr when finishing in stage, and the electric current by auxiliary power switching tube Sa is input current Ii, and resonant capacitance Cr both end voltage is designated as Vcr3.
Pattern 5: Fig. 9 (e), [t3-t4] (electric current by auxiliary power switching tube Sa begins oppositely, be defined as t4 during its inverse parallel diode current flow) stage.After t=t3, master power switch pipe S begins conducting, increases by the electric current of the Lr forward of starting from scratch simultaneously.Though the electric current by auxiliary power switching tube Sa is a forward, reduces gradually from input current value.When this finished in stage, the electric current by auxiliary power switching tube Sa was reduced to zero, and the electric current by master power switch pipe S is input current Ii, and resonant capacitance Cr both end voltage is designated as Vcr4.
Pattern 6: Fig. 9 (f), [t4-t5] (electric current by master power switch pipe S is defined as t5 when reverting to zero current Ii) stage.During t=t4, the electric current by auxiliary power switching tube Sa begins oppositely its inverse parallel diode current flow.The electric current of this stage by master power switch pipe S is input current Ii and the electric current sum of passing through auxiliary power switching tube Sa.Can turn-off auxiliary power switching tube Sa therebetween at this, thereby the ZVZCS that has realized Sa turn-offs.When finishing to this, the electric current by master power switch pipe S reverts to input current Ii in stage, and resonant capacitance Cr both end voltage reverts to the magnitude of voltage before the auxiliary circuit work, i.e. Vcr0 again.
Mode 7: Fig. 9 (g), [t5-t6] (moment that master power switch pipe S turn-offs is defined as t6) stage.Because auxiliary power switching tube Sa turn-offs, S is open-minded for the master power switch pipe, and is identical with common pwm converter working condition in this stage.In this stage, input current Ii is all by master power switch pipe S.
Pattern 8: Fig. 9 (h), [t6-t7] (when capacitor C s is charged to output voltage V o, diode current flow, being defined as t7) stage.During t=t6, master power switch pipe S turn-offs, and capacitor C s begins charging.Because capacitance voltage can not suddenly change, so the shutoff of master power switch pipe S is ZVS.When capacitor C s was charged to output voltage VO, diode D conducting began up to the next work period.
From the description of above-mentioned work period as seen, soft switch DC-DC converter circuit that this programme proposes, simple in structure, realized the soft switch of master power switch pipe, auxiliary power switching tube, rectifier diode.Thereby can obviously improve the converter operating efficiency, be with a wide range of applications.
Figure 11 is one of power factor correction schematic circuit of using this programme, and it is that soft boost switching formula converter shown in Figure 7 is used in power factor correction (PFC) circuit.What wherein link to each other with two power switch pipes (S, Sa) control end is pfc controller; Increase a rectifier bridge of forming by diode Da, Db, Dc, Dd at input.Figure 12 uses soft boost switching formula converter shown in Figure 8 in power factor correction (PFC) circuit.
Embodiment two: soft switch step-down (Buck) DC converter.See Figure 13, the difference of present embodiment and embodiment one is, its basic circuit difference, promptly described input dc power potential source Vin, output DC source, energy storage inductor Lf, master power switch pipe S, rectifier diode D constitute a step-down (Buck) converter, rather than booster converter.Auxiliary power switching tube Sa is not the primary element of Buck converter, but the solution of the present invention is that auxiliary power switching tube Sa is all arranged, and the described several different converters in back also together.
This routine feature is: on the major loop, between master power switch pipe S and the energy storage inductor Lf, and the resonant inductance Lr that connects, this resonant inductance Lr one termination energy storage inductor Lf, the negative electrode of another termination rectifier diode D and the common ends of master power switch pipe S; Resonant capacitance Cr of series connection on auxiliary power switching tube Sa branch road, one is terminated at input dc power potential source Vin anode, another termination auxiliary power switching tube Sa; At a described main and auxiliary inverse parallel diode of difference reverse parallel connection Ds, Dsa on power switch tube S, the Sa, charge and discharge capacitance Cs also in parallel on master power switch pipe S of helping.
As seen, this example is that resonant inductance Lr, the main and auxiliary link position of power switch tube S, Sa, resonant capacitance Cs that helps are different with the difference of embodiment one, and it is that basic circuit with this class DC converter adapts.Below several different converters also be like this.
Embodiment three: soft switch lifting/voltage reducing (Buck/Boost) converter.See Figure 14, described input dc power potential source (Vin), output DC source, energy storage inductor Lf, master power switch pipe S, auxiliary power switching tube Sa, rectifier diode D constitute lifting/voltage reducing (Buck/Boost) converter.
It is characterized in that: on energy storage inductor Lf branch road, the resonant inductance Lr that connects, this resonant inductance Lr one termination energy storage inductor Lf, the other end are connected to the common ends of negative electrode and the master power switch pipe S of rectifier diode D on the major loop; Resonant capacitance Cr of series connection on auxiliary power switching tube Sa branch road, one is terminated at input dc power potential source Vin anode, another termination auxiliary power switching tube Sa; At a described main and auxiliary inverse parallel diode of difference reverse parallel connection Ds, Dsa on power switch tube S, the Sa, charge and discharge capacitance Cs also in parallel on master power switch pipe S of helping.
Embodiment four: soft switch mound gram (Cuk) converter.See Figure 15, described input dc power potential source (Vin), output DC source, energy storage inductor Lf, master power switch pipe S, auxiliary power switching tube Sa, rectifier diode D constitute the Qiu Keshi converter;
It is characterized in that: on the major loop, between master power switch pipe S branch road and the auxiliary power switching tube Sa branch road, the resonant inductance Lr that connects, this resonant inductance Lr one termination master power switch pipe S negative terminal, another termination auxiliary power switching tube Sa negative terminal; Resonant capacitance Cr of series connection on auxiliary power switching tube Sa branch road, one is terminated at the first energy storage inductor Lf1, another termination auxiliary power switching tube Sa; At a described main and auxiliary inverse parallel diode of difference reverse parallel connection Ds, Dsa on power switch tube S, the Sa, charge and discharge capacitance Cs also in parallel on master power switch pipe S of helping.
Embodiment five: soft switch single ended primary induction formula converter (SEPIC).See Figure 16, described input dc power potential source (Vin), output DC source, energy storage inductor Lf, master power switch pipe S, auxiliary power switching tube Sa, rectifier diode D constitute single ended primary induction formula converter (SEPIC).
It is characterized in that: on the major loop, between master power switch pipe S branch road and the auxiliary power switching tube Sa branch road, the resonant inductance Lr that connects, this resonant inductance Lr one termination master power switch pipe S negative terminal, another termination auxiliary power switching tube Sa negative terminal; Resonant capacitance Cr of series connection on auxiliary power switching tube Sa branch road, one is terminated at the first energy storage inductor Lf1, another termination auxiliary power switching tube Sa; At a described main and auxiliary inverse parallel diode of difference reverse parallel connection Ds, Dsa on power switch tube S, the Sa, charge and discharge capacitance Cs also in parallel on master power switch pipe S of helping.
Embodiment six: soft switch Saite (Zeta) converter.See Figure 17, described input dc power potential source (Vin), output DC source, energy storage inductor Lf, master power switch pipe S, auxiliary power switching tube Sa, rectifier diode D constitute Saite (Zeta) converter.
It is characterized in that: on the first energy storage inductor Lf1 branch road, the resonant inductance Lr that connects, this resonant inductance Lr one termination first energy storage inductor Lf1, the other end is connected to the anode of master power switch pipe S on the major loop; Resonant capacitance Cr of series connection on auxiliary power switching tube Sa branch road, one is terminated at input dc power potential source Vin negative terminal, another termination auxiliary power switching tube Sa; At a described main and auxiliary inverse parallel diode of difference reverse parallel connection Ds, Dsa on power switch tube S, the Sa, charge and discharge capacitance Cs also in parallel on master power switch pipe S of helping.
In above each example of the present invention, the power grade of auxiliary power switching tube Sa is than the power grade of master power switch pipe S much smaller (be generally master power switch pipe about 1/3rd), and resonant inductance Lr is than energy storage inductor Lf much smaller (Lr is generally about 10uH).
Master power switch pipe S and auxiliary power switching tube Sa can be metal-oxide-semiconductor (power field effect pipe) or IGBT pipe (insulated gate bipolar transistor) among the present invention, its inverse parallel diode can be its body diode or external diode, and the capacitor C s in parallel with master power switch pipe S can be self junction capacitance or external capacitor of master power switch pipe.
The present invention relates in the circuit, all voltage source vin directly are connected with energy storage inductor Lf, can be substituted by a current source.This also protects within the right in the present invention.
The foregoing description one to six is several example of the present invention, but the present invention is not limited to these examples, and in fact, the present invention can also be used for other DC converter.
Claims (17)
1, the soft-switching process of DC converter power switch pipe is characterized in that:
Increase auxiliary power switching tube (Sa), resonant capacitance (Cr), resonant inductance (Lr), three and master power switch pipe (S) constitute resonant tank;
Go up diode of reverse parallel connection (Ds, Dsa) respectively at main and auxiliary assist rate switching tube (S, Sa), and go up a charge and discharge capacitance (Cs) in parallel at master power switch pipe (S);
The characteristic of utilizing the resonance characteristic of above-mentioned resonant tank, characteristic that resonant inductance (Lr) electric current can not suddenly change and charge and discharge capacitance (Cs) voltage not to suddenly change, and control main and auxiliary assist rate switching tube (S, Sa) by pulse-width modulation circuit and periodically turn on and off, the zero-voltage current of realizing master power switch pipe (S) is opened, no-voltage is closed, the zero current of auxiliary power switching tube (Sa) is opened, zero-voltage current closes, and the no-voltage of rectifier diode (D) is closed.
2, the soft-switching process of DC converter power switch pipe as claimed in claim 1 is characterized in that the cycle that main and auxiliary assist rate switching tube (S, Sa) turns on and off comprises following process at least:
1) at main and auxiliary assist rate switching tube (S, Sa) because all when being in off state, at first that auxiliary power switching tube (Sa) is open-minded, the characteristic that utilize resonant inductance (Lr) electric current not suddenly change this moment realizes the zero current turning-on of auxiliary power switching tube (Sa);
2) wait for resonant tank work to charge and discharge capacitance (Cs) discharge fully, and during diode (Ds) conducting of master power switch pipe (S) reverse parallel connection, open master power switch pipe (S), utilize the characteristic that resonant inductance (Lr) electric current can not suddenly change, charge and discharge capacitance (Cs) voltage can not suddenly change this moment, realize that the zero current no-voltage of master power switch pipe (S) is open-minded;
3) when the electric current by auxiliary power switching tube (Sa) begins oppositely, during its inverse parallel diode current flow, auxiliary power switching tube (Sa) is turn-offed, realize that the zero current no-voltage of auxiliary power switching tube (Sa) is turn-offed;
4) decide according to the needs of converter circuit the opportunity of master power switch pipe (S), the characteristic of utilizing charge and discharge capacitance (Cs) voltage in parallel with master power switch pipe (S) not suddenly change realizes that the no-voltage of master power switch pipe (S) is turn-offed;
Above-mentioned 1)-4) be included in the one-period, next cycle repeats said process.
3, a kind of soft switch DC converter comprises input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D).
It is characterized in that:
A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, and a resonant inductance (Lr) also is set in circuit, and described resonant capacitance (Cr), resonant inductance (Lr) and main and auxiliary assist rate switching tube (S, Sa) constitute the resonant tank of a closure; Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
4, soft switch DC converter as claimed in claim 3, it is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute booster converter, be that described energy storage inductor (Lf) is connected on the major loop, one termination input direct current voltage source (Vin) anode; Rectifier diode (D) also is connected on the major loop, and its negative electrode connects output; Described main and auxiliary assist rate switching tube (S, Sa) cross-over connection in parallel is on major loop, and wherein auxiliary power switching tube (Sa) branch road is near energy storage inductor (Lf) end, and the control end of two power switch pipes (S, Sa) links to each other with pulse-width modulation circuit respectively,
Described resonant inductance (Lr) is on the major loop, between two power switch pipes (S, Sa) branch road, a termination energy storage inductor (Lf), the anode of another termination rectifier diode (D); The resonant capacitance (Cr) of connecting on auxiliary power switching tube (Sa) branch road, one are terminated between resonant inductance (Lr) and the energy storage inductor (Lf), another termination auxiliary power switching tube (Sa).
5, soft switch DC converter as claimed in claim 4, it is characterized in that: in circuit, also be provided with transformer (T) and two and present diode (D1, D2), the former limit of described transformer (T) is series on auxiliary power switching tube (Sa) branch road, one is terminated between resonant inductance (Lr) and the energy storage inductor (Lf), another termination resonant capacitance (Cr); Its secondary has three taps, and wherein the tap at two ends is connected to two anodes of presenting diode (D1, D2) respectively, and centre cap is connected to the load negative terminal; After linking, two negative electrodes of presenting diode (D1, D2) are connected to the load anode.
6, soft switch DC converter as claimed in claim 3 is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute a buck converter;
On the major loop, between master power switch pipe (S) and the energy storage inductor (Lf), the resonant inductance (Lr) of connecting, this resonant inductance (Lr) termination energy storage inductor (Lf), the common ends of the negative electrode of another termination rectifier diode (D) and master power switch pipe (S); A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, one is terminated at input DC power (Vin) anode, another termination auxiliary power switching tube (Sa); Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
7, soft switch DC converter as claimed in claim 3 is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute the lifting/voltage reducing converter;
On energy storage inductor (Lf) branch road, the resonant inductance (Lr) of connecting, this resonant inductance (Lr) termination energy storage inductor (Lf), the other end are connected to the common ends of the negative electrode and the master power switch pipe (S) of rectifier diode on the major loop (D); A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, one is terminated at input DC power (Vin) anode, another termination auxiliary power switching tube (Sa); Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
8, soft switch DC converter as claimed in claim 3 is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute the Qiu Keshi converter;
On the major loop, between master power switch pipe (S) branch road and auxiliary power switching tube (Sa) branch road, the resonant inductance (Lr) of connecting, this resonant inductance (Lr) termination master power switch pipe (S) negative terminal, another termination auxiliary power switching tube (Sa) negative terminal; A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, one is terminated at first energy storage inductor (Lf1), another termination auxiliary power switching tube (Sa); Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
9, soft switch DC converter as claimed in claim 3 is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute single ended primary induction formula converter (SEPIC);
On the major loop, between master power switch pipe (S) branch road and auxiliary power switching tube (Sa) branch road, the resonant inductance (Lr) of connecting, this resonant inductance (Lr) termination master power switch pipe (S) negative terminal, another termination auxiliary power switching tube (Sa) negative terminal; A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, one is terminated at first energy storage inductor (Lf1), another termination auxiliary power switching tube (Sa); Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
10, soft switch DC converter as claimed in claim 3 is characterized in that: described input DC power (Vin), output DC source, energy storage inductor (Lf), master power switch pipe (S), auxiliary power switching tube (Sa), rectifier diode (D) constitute the Saite converter;
On first energy storage inductor (Lf1) branch road, the resonant inductance (Lr) of connecting, this resonant inductance (Lr) termination first energy storage inductor (Lf1), the other end are connected to the anode of master power switch pipe (S) on the major loop; A series connection resonant capacitance (Cr) on auxiliary power switching tube (Sa) branch road, one is terminated at input DC power (Vin) negative terminal, another termination auxiliary power switching tube (Sa); Go up inverse parallel diode of reverse parallel connection (Ds, Dsa) respectively at described main and auxiliary assist rate switching tube (S, Sa), go up a charge and discharge capacitance (Cs) also in parallel at master power switch pipe (S).
11, as the described soft switch DC converter of claim 3-10, it is characterized in that: the charge and discharge capacitance (Cs) in parallel with master power switch pipe (S) is self junction capacitance of master power switch pipe (S).
12, as the described soft switch DC converter of claim 3-10, it is characterized in that: input DC power is voltage source or current source.
13. software switch DC converter as claimed in claim 11, Ji Tezheng is: input DC power is voltage source or current source.
14, as the described soft switch DC converter of claim 3-10, it is characterized in that: described master power switch pipe (S), auxiliary power switching tube (Sa) are power field effect pipes, be metal-oxide-semiconductor or insulated gate bipolar transistor, be the IGBT pipe, its inverse parallel diode (Ds, Dsa) is its body diode or external diode.
15, soft switch DC converter as claimed in claim 11, it is characterized in that: described master power switch pipe (S), auxiliary power switching tube (Sa) are power field effect pipes, be metal-oxide-semiconductor or insulated gate bipolar transistor, be the IGBT pipe, its inverse parallel diode (Ds, Dsa) is its body diode or external diode.
16, soft switch DC converter as claimed in claim 12, it is characterized in that: described master power switch pipe (S), auxiliary power switching tube (Sa) are power field effect pipes, be metal-oxide-semiconductor or insulated gate bipolar transistor, be the IGBT pipe, its inverse parallel diode (Ds, Dsa) is its body diode or external diode.
17, soft switch DC converter as claimed in claim 13, it is characterized in that: described master power switch pipe (S), auxiliary power switching tube (Sa) are power field effect pipes, be metal-oxide-semiconductor or insulated gate bipolar transistor, be the IGBT pipe, its inverse parallel diode (Ds, Dsa) is its body diode or external diode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00136884A CN1123962C (en) | 2000-12-21 | 2000-12-21 | Soft switching method for power switching transistor of DC converter and soft-switching DC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN00136884A CN1123962C (en) | 2000-12-21 | 2000-12-21 | Soft switching method for power switching transistor of DC converter and soft-switching DC converter |
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| CN1299179A true CN1299179A (en) | 2001-06-13 |
| CN1123962C CN1123962C (en) | 2003-10-08 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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