CN105099177A - Zero-voltage conversion pulse width modulation converter - Google Patents
Zero-voltage conversion pulse width modulation converter Download PDFInfo
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Abstract
The invention is suitable for the field of electric energy conversion technology, and particularly relates to a zero-voltage conversion pulse width modulation converter. High-efficiency DC-DC electric energy conversion can be realized in a full-input-voltage range and a full-load range. Under a precondition that all advantages of an existing ZVT PWM converter and an improved product of the ZVT PWM converter are kept through application of a reset circuit, defects in prior art are overcome. On various working conditions such as the full-input-voltage range and the full-load range, high-efficiency DC-DC electric energy conversion can be realized. The zero-voltage conversion pulse width modulation converter has high value for application in an occasion with a middle or large power.
Description
Technical field
The invention belongs to transformation of electrical energy technical field, particularly relate to a kind of Zero voltage transition pulse width modulated inverter, can realize the transformation of electrical energy of efficient DC-to-DC in full input voltage range, full-load range.
Background technology
Zero voltage transition (ZeroVoltageTransition, be called for short ZVT) pulse-width modulation (PulseWidthModulation, be called for short PWM) technology, utilize auxiliary switch to shift to an earlier date main switch to open the short time, whole electric charges that whole electric currents of main inductance, main switch shutoff buffer capacitor store are diverted in auxiliary induction all gradually, thus main switch realizes zero voltage switch, main diode realizes zero-current switching, efficient transformation of electrical energy can be realized.
(Ruan Xinbo, tight Rangoon are write in China's edition books " soft switch technique of direct-current switch power supply ", Science Press, in January, 2000 first edition, International Standard Book Number ISBN7-03-007766-0, No. 32120th, China depository library CIP data core word (1999), hereinafter referred to as " books " soft switch technique " "), detailed discussion has been done to ZVTPWM technology and modified model thereof, and 6 kinds of basic not isolated converters are applied to them give circuit diagram, circuit diagram is depicted in the 143rd page of Fig. 5 .4 and the 150th page Fig. 5 .9 of this book respectively.
6 kinds that mention in books " soft switch technique " basic not isolated converters, comprise: Buck (step-down), Boost (boosting), Buck/Boost (buck), Cuk, Sepic, Zeta, wherein latter three is name with the name of inventor.After the three such as auxiliary switch Qa, auxiliary induction La, booster diode Da in the 143rd of this book the page of Fig. 5 .4 being removed, remaining components and parts just constitute the main topological structure of 6 kinds of basic not isolated converters.
Books " soft switch technique " are pointed out, ZVTPWM converter, and tool has the following advantages: main switch and main diode achieve Sofe Switch, and voltage, current stress do not increase, auxiliary switch is zero current turning-on, and auxiliary circuit electric current is by the time is short, loss is low, and switching tube constant frequency works; Modified model ZVTPWM converter, among other advantages, also achieves the zero voltage turn-off of auxiliary switch.The emulation example that this book provides, demonstrates foregoing description well.Based on above-mentioned cognition, specification, the heat dissipation design of auxiliary switch, booster diode, auxiliary induction etc. are all chosen by low-loss and implement.
Because ZVTPWM converter and modified model thereof have so outstanding advantage, so be widely used in middle large-power occasions, such as 1 kilowatt to the mid power photovoltaic DC-to-AC converter in 10 kilowatt range, first order booster circuit just usually adopts follow-on Boost type ZVTPWM converter.
But, the above-mentioned advantage that the ZVTPWM converter of present use and modified model thereof have, obtain under main switch has the condition of conducting, and under the operating mode only having auxiliary switch conducting, not only above-mentioned advantage has not existed, and there is following defect: auxiliary switch is that big current is open-minded, and booster diode bears main output current, and the Reverse recovery existed when turning off, loss increases considerably.Reason is as follows:
In whole switch periods, only have the operating mode of auxiliary switch conducting, appear at occasion like this:
1, in Boost type ZVTPWM converter, input voltage closely output voltage time, as 1 kilowatt to the mid power photovoltaic DC-to-AC converter in 10 kilowatt range, because complete machine conversion efficiency requires high, first order booster circuit usually adopts Boost type ZVTPWM converter, and such as photovoltaic cell voltage change range is from 100 volts to 450 volts, and booster circuit rated output voltage is 360V, when photovoltaic cell voltage be near 360 volts and slightly low time, just there is this type of operating mode;
2, Buck type ZVTPWM converter, when output voltage is lower, as the voltage-dropping type ZVTPWM converter of experiment in wide region adjustable stabilized voltage supply, when output voltage is close to 0 volt.
Under the operating mode only having auxiliary switch conducting, auxiliary switch conduction period, the continuing current flow of auxiliary induction rises to peak value; Auxiliary switch blocking interval, the back-pressure at auxiliary induction two ends is very low, and electric current declines seldom, so auxiliary induction and booster diode are by main output current; Start at next cycle, that big current is open-minded when auxiliary switch is opened, booster diode is that big current turns off and there is Reverse recovery, their loss all increases considerably, because they are chosen specification by low-power consumption and take cooling measure, so it is bad to there will be heat radiation, causes temperature rise too high and damage, whole converter was lost efficacy.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Zero voltage transition pulse width modulated inverter, under being intended to only have the operating mode of auxiliary switch conducting, also can realize the Zero Current Switch of auxiliary switch, booster diode etc., maintain shorter electric current by time and lower loss.
The first Zero voltage transition pulse width modulated inverter provided by the present invention is Boost type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS1, boost inductance L1, main switch Q1, main diode D1, filter capacitor CF1; Wherein, the hot end of main switch Q1 is connected to the positive pole of input power VS1 by boost inductance L1, and its cold end connects the negative pole of input power VS1; The anode of main diode D1 connects the hot end of main switch Q1, and its negative electrode connects the positive pole of filter capacitor CF1, and filter capacitor CF1 negative pole connects the negative pole of power supply VS1; Output voltage VO 1 is drawn from the positive pole of filter capacitor CF1, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA1, auxiliary switch QA1, buffering diode DH1, auxiliary capacitor CA1, booster diode DA1; Wherein, the hot end of auxiliary switch QA1 connects the hot end of main switch Q1 by auxiliary induction LA1, its cold end connects the cold end of main switch Q1; The anode of booster diode DA1 connects the negative electrode of buffering diode DH1, and the negative electrode of booster diode DA1 connects the negative electrode of main diode D1; The two poles of the earth of auxiliary capacitor CA1 connect the negative electrode of buffering diode DH1, the hot end of main switch Q1 respectively;
Described reset circuit comprises reset capacitance CR1, reset inductance L R1 and reset diode DR1; Wherein, the two poles of the earth of reset capacitance CR1 connect the hot end of auxiliary switch QA1, the anode of buffering diode DH1 respectively; The cold end of the auxiliary switch QA1 of the anode connection of reset diode DR1, its negative electrode is connected to the DH1 anode of buffering diode by reset inductance L R1.
Further, have the operating mode of conducting at main switch Q1 under, with the two poles of the earth short circuit of mechanical contact by the two poles of the earth short circuit reset capacitance CR1 of reset capacitance CR1.
Further, also comprise Absorption Capacitance, the two poles of the earth of described Absorption Capacitance connect hot end, the cold end of main main switch Q1 respectively, and simultaneous buffering diode DH1 short circuit, auxiliary capacitor CA1 does not install.
Further, the capacity of reset capacitance CR1 is 2 to 10 times of the capacity of auxiliary capacitor CA1.
Further, main switch Q1, auxiliary switch QA1 are igbt, or npn power transistor, or the PNP power transistor of anti-paralleled diode; Or P channel power field effect transistor; Main diode D1, buffering diode DH1, booster diode DA1, reset diode DR1 are fast recovery diodes, or Ultrafast recovery diode, or Schottky diode.
The second Zero voltage transition pulse width modulated inverter provided by the present invention is Buck type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS2, main switch Q2, main diode D2, filter inductance L2, filter capacitor CF2; Wherein, the hot end of main switch Q2 is connected to the positive pole of input power VS2, and its cold end connects the negative electrode of main diode D2; The anode of main diode D2 connects the negative pole of input power VS2, and its negative electrode connects the positive pole of filter capacitor CF2 by filter inductance L2, and filter capacitor CF2 negative pole connects the negative pole of power supply VS2; Output voltage VO 2 is drawn from the positive pole of filter capacitor CF2, negative pole two ends;
Described auxiliary circuit comprises auxiliary switch QA2, auxiliary induction LA2, buffering diode DH2, auxiliary capacitor CA2, booster diode DA2; Wherein, the hot end of auxiliary switch QA2 connects the hot end of main switch Q2, and its cold end connects the cold end of main switch Q2 by auxiliary induction LA2; The anode of booster diode DA2 connects the anode of above-mentioned main diode D2, and its negative electrode connects the anode of buffering diode DH2; The two poles of the earth of auxiliary capacitor CA2 connect the anode of buffering diode DH2, the cold end of main switch Q2 respectively;
Described reset circuit comprises reset capacitance CR2, reset inductance L R2 and reset diode DR2; Wherein, the two poles of the earth of reset capacitance CR2 connect the cold end of auxiliary switch QA2, the negative electrode of buffering diode DH2 respectively; The anode of reset diode DR2 connects the negative electrode of buffering diode DH2 by reset inductance L R2, its negative electrode connects the hot end of auxiliary switch QA2.
The third Zero voltage transition pulse width modulated inverter provided by the present invention is Buck/Boost type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS3, main switch Q3, energy storage inductor L3, main diode D3, filter capacitor CF3; Wherein, the hot end of main switch Q3 is connected to the positive pole of input power VS3, and its cold end connects the negative pole of input power VS3 by energy storage inductor L3; The anode of main diode D3 connects the negative pole of filter capacitor CF3, and its negative electrode connects the cold end of main switch Q3, and the positive pole of filter capacitor CF3 connects the negative pole of input power VS3; Output voltage VO 3 is drawn from the positive pole of filter capacitor CF3, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA3, auxiliary switch QA3, buffering diode DH3, auxiliary capacitor CA3, booster diode DA3, wherein, the hot end of auxiliary switch QA3 connects the hot end of main switch Q3, and its cold end connects the cold end of main switch Q3 by auxiliary induction LA3; The anode of booster diode DA3 connects the anode of main diode D3, and its negative electrode connects the anode of buffering diode DH3; The two poles of the earth of auxiliary capacitor CA3 connect the anode of buffering diode DH3, the cold end of main switch Q3 respectively;
Described reset circuit comprises reset capacitance CR3, reset inductance L R3 and reset diode DR3; Wherein, the two poles of the earth of reset capacitance CR3 connect the cold end of auxiliary switch QA3, the negative electrode of buffering diode DH3 respectively; The anode of reset diode DR3 connects the negative electrode of buffering diode DH3 by reset inductance L R3, its negative electrode connects the hot end of auxiliary switch QA3.
4th kind of Zero voltage transition pulse width modulated inverter provided by the present invention is Cuk type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS4, boost inductance L4, main switch Q4, capacitance CB4, main diode D4, filter inductance LF4, filter capacitor CF4; Wherein the hot end of main switch Q4 is connected to the positive pole of input power VS4 by boost inductance L4, and its cold end connects the negative pole of input power VS4; The anode of main diode D4 is connected to the hot end of main switch Q4, is also connected to the negative pole of filter capacitor CF4 by filter inductance LF4, and its negative electrode connects the positive pole of filter capacitor CF4; The two ends of capacitance CB4 connect the cold end of main switch Q4, the positive pole of filter capacitor CF4 respectively; Output voltage VO 4 is drawn from the positive pole of filter capacitor CF4, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA4, auxiliary switch QA4, buffering diode DH4, auxiliary capacitor CA4, booster diode DA4; The hot end of auxiliary switch QA4 connects the hot end of main switch Q4 by auxiliary induction LA4, its cold end connects the cold end of main switch Q4; The anode of booster diode DA4 connects the negative electrode of buffering diode DH4, and its negative electrode connects the negative electrode of main diode D4; The two poles of the earth of auxiliary capacitor CA4 connect the negative electrode of buffering diode DH4, the hot end of main switch Q4 respectively;
Described reset circuit comprises reset capacitance CR4, reset inductance L R4 and reset diode DR4; Wherein, the two poles of the earth of reset capacitance CR4 connect the hot end of auxiliary switch QA4, the anode of buffering diode DH4 respectively; The anode of reset diode DR4 connects the cold end of auxiliary switch QA4, and its negative electrode is connected to the anode of buffering diode DH4 by reset inductance L R4.
5th kind of Zero voltage transition pulse width modulated inverter provided by the present invention is Sepic type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS5, boost inductance L5, main switch Q5, capacitance CB5, energy storage inductor LF5, main diode D5, filter capacitor CF5; Wherein, the hot end of main switch Q5 is connected to the positive pole of input power VS5 by boost inductance L5, and its cold end connects the negative pole of input power VS5; The anode of main diode D5 is connected to the hot end of main switch Q5, is also connected the negative pole of filter capacitor CF5 by energy storage inductor LF5, and its negative electrode connects the positive pole of filter capacitor CF5; The two ends of capacitance CB5 connect the cold end of main switch Q5, the negative pole of filter capacitor CF5 respectively; Output voltage VO 5 is drawn from the positive pole of filter capacitor CF5, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA5, auxiliary switch QA5, buffering diode DH5, auxiliary capacitor CA5, booster diode DA5; The hot end of auxiliary switch QA5 connects the hot end of main switch Q5 by auxiliary induction LA5, its cold end connects the cold end of main switch Q5; The anode of booster diode DA5 connects the negative electrode of buffering diode DH5, and its negative electrode connects the negative electrode of main diode D5; The two poles of the earth of auxiliary capacitor CA5 connect the negative electrode of buffering diode DH5, the hot end of main switch Q5 respectively;
Described reset circuit comprises reset capacitance CR5, reset inductance L R5 and reset diode DR5; Wherein, the two poles of the earth of reset capacitance CR5 connect the hot end of auxiliary switch QA5, the anode of buffering diode DH5 respectively; The anode of reset diode DR5 connects the cold end of auxiliary switch QA5, and its negative electrode is connected to the anode of buffering diode DH5 by reset inductance L R5.
6th kind of Zero voltage transition pulse width modulated inverter provided by the present invention is Zeta type, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS6, main switch Q6, energy storage inductor L6, capacitance CB6, main diode D6, filter inductance LF6, filter capacitor CF6; Wherein, the hot end of main switch Q6 is connected to the positive pole of input power VS6, and its cold end connects the negative pole of input power VS6 by energy storage inductor L6; The anode of main diode D6 connects the negative pole of filter capacitor CF6, and its negative electrode connects the cold end of main switch Q6, and its negative electrode is also connected to the positive pole of filter capacitor CF6 by filter inductance LF6; Capacitance CB6 two ends connect the negative pole of input power VS6, the negative pole of filter capacitor CF6 respectively; Output voltage VO 6 is drawn from the positive pole of filter capacitor CF6, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA6, auxiliary switch QA6, buffering diode DH6, auxiliary capacitor CA6, booster diode DA6; Wherein, the hot end of auxiliary switch QA6 connects the hot end of main switch Q6, and its cold end connects the cold end of main switch Q6 by auxiliary induction LA6; The anode of booster diode DA6 connects the anode of main diode D6, and its negative electrode connects the anode of buffering diode DH6; The two poles of the earth of auxiliary capacitor CA6 connect the anode of buffering diode DH6, the cold end of main switch Q6 respectively;
Described reset circuit comprises reset capacitance CR6, reset inductance L R6 and reset diode DR6; Wherein, the two poles of the earth of reset capacitance CR6 connect the cold end of auxiliary switch QA6, the negative electrode of buffering diode DH6 respectively; The anode of reset diode DR6 connects the negative electrode of buffering diode DH6 by reset inductance L R6, its negative electrode connects the hot end of auxiliary switch QA6.
The Zero voltage transition pulse width modulated inverter that the present invention proposes, only have the operating mode of auxiliary switch conducting in whole switch periods under, close at auxiliary switch and have no progeny, because reset capacitance CR is connected in the discharge loop of auxiliary induction, so under reset capacitance effect, before next switch periods arrives, the electric current resonance zero for a long time of auxiliary induction.So just achieve the zero current turning-on of auxiliary switch, auxiliary induction etc., the zero-current switching of booster diode, reset diode etc., they all have shorter electric current by time and lower loss.When auxiliary switch conducting, the voltage of reset capacitance passes through reset inductance and the involution of reset diode resonance, for follow-up work is ready; Close at auxiliary switch and have no progeny, electric current in reset inductance is by reset diode, booster diode etc., a high voltage source in inflow converter is (as the output voltage in Boost, input voltage in Buck converter), electric current makes zero rapidly, so reset diode is zero-current switching.Therefore present invention preserves existing ZVTPWM converter and follow-on all advantages thereof, overcome the shortcoming of prior art simultaneously, under the various operating modes such as full input voltage range, full-load range, the transformation of electrical energy of efficient DC-to-DC can be realized, there is the value applied in middle large-power occasions.
Accompanying drawing explanation
Fig. 1 is the logical framework figure of Zero voltage transition pulse width modulated inverter provided by the invention;
Fig. 2 is the circuit structure diagram for Boost type Zero voltage transition pulse width modulated inverter that first embodiment of the invention provides;
Fig. 3 is the circuit structure diagram of the Buck type Zero voltage transition pulse width modulated inverter that second embodiment of the invention provides;
Fig. 4 is the circuit structure diagram of the Buck/Boost type Zero voltage transition pulse width modulated inverter that third embodiment of the invention provides;
Fig. 5 is the circuit structure diagram of the Cuk type Zero voltage transition pulse width modulated inverter that fourth embodiment of the invention provides;
Fig. 6 is the circuit structure diagram of the Sepic type Zero voltage transition pulse width modulated inverter that fifth embodiment of the invention provides;
Fig. 7 is the circuit structure diagram of the Zeta type Zero voltage transition pulse width modulated inverter that sixth embodiment of the invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the logical framework of Zero voltage transition pulse width modulated inverter provided by the invention, comprises main circuit 1, auxiliary circuit 2 and reset circuit 3.For whole switch duty cycle, the present invention just only has two kinds of operating modes in itself: main circuit has the operating mode of conducting, only has the operating mode of auxiliary circuit conducting, and technical scheme of the present invention is under these two kinds of operating modes, all can realize low-loss, obtains high efficiency.Type hereafter with regard to 6 kinds of Zero voltage transition pulse width modulated inverters such as Buck, Boost, Buck/Boost, Cuk, Sepic, Zeta is described in detail respectively.
Embodiment one, Boost type Zero voltage transition pulse width modulated inverter
As shown in Figure 1, the Boost type Zero voltage transition pulse width modulated inverter that the present embodiment provides, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS1, boost inductance L1, main switch Q1, main diode D1, filter capacitor CF1 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA1, auxiliary switch QA1, buffering diode DH1, booster diode DA1, auxiliary capacitor CA1 etc.
Described main switch Q1 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS1 by boost inductance L1, and its source electrode connects the negative pole of input power VS1, the negative pole etc. of filter capacitor CF1; The anode of described main diode D1 connects the drain electrode of main switch Q1, and its negative electrode connects the positive pole of filter capacitor CF1; Output voltage VO 1 is drawn from the positive pole of filter capacitor CF1, negative pole two ends.
Described auxiliary switch QA1 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of main switch Q1 by auxiliary induction LA1, its source electrode connects the source electrode of main switch Q1; The anode of described booster diode DA1 connects the negative electrode of buffering diode DH1, and its negative electrode connects the negative electrode of above-mentioned main diode D1; The two poles of the earth of described auxiliary capacitor CA1 connect the negative electrode of buffering diode DH1, the drain electrode of above-mentioned main switch Q1 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR1, reset inductance L R1 and reset diode DR1 etc.; The two poles of the earth of described reset capacitance CR1 connect the drain electrode of above-mentioned auxiliary switch QA1, the anode of above-mentioned buffering diode DH1 respectively; The anode of described reset diode DR1 connects the source electrode of above-mentioned auxiliary switch QA1, and its negative electrode is connected to the anode of above-mentioned buffering diode DH1 by reset inductance L R1.
Below the course of work of converter of the present invention, the reason of acquisition aforementioned advantages are explained in detail.
In whole switch periods, have the operating mode of main switch QA1 conducting, its operative scenario is consistent with the situation of prior art, has detailed description, no longer repeat here in books " soft switch technique ".
In whole switch periods, if only have auxiliary switch QA1 conducting, its course of work is as follows:
During auxiliary switch QA1 conducting, the electric current of auxiliary induction LA1 starts to rise, until peak value from 0.Time span during this is labeled as ON time Ton, be generally less than 10% of switch periods T, the applied voltage at auxiliary induction LA1 two ends is maximum approximates output voltage VO 1, and the current peak Ip calculating auxiliary induction LA1 is VO1*Ton/LA1 to the maximum, is less than 0.1*VO1*T/LA1.
While auxiliary switch QA1 conducting, reset capacitance CR1, reset inductance L R1, reset diode DR1, auxiliary switch QA1 etc. form resonance path, the current resonance of reset inductance L R1 rises, the voltage resonance of reset capacitance CR1 declines, the electric charge release be filled with by auxiliary switch QA1 blocking interval.By the Selecting parameter of reset capacitance CR1, reset inductance L R1, make when auxiliary switch QA1 ON time is maximum, the voltage resonance of reset capacitance CR1 drops to 0.
Be in blocking interval at auxiliary switch QA1, the electric current of auxiliary induction LA1, by reset capacitance CR1, buffering diode DH1, booster diode DA1, forms path finally by filter capacitor CF1; Wherein reset capacitance CR1 is filled with electric charge, its voltage resonance rises, the current resonance zero of auxiliary induction LA1, time span is 1/4 of the reset harmonic period that auxiliary induction LA1, reset capacitance CR1 determine, by the Selecting parameter of auxiliary induction LA1, reset capacitance CR1, the time span that current resonance makes zero can be made to be less than 10% to 30% of switch periods.
While auxiliary switch QA1 is in blocking interval, the electric current of reset inductance L R1 is by reset diode DR1, buffering diode DH1, booster diode DA1, path is formed finally by filter capacitor CF1, reset inductance L R1 two ends back-pressure approximates output voltage VO 1, and electric current decays to zero rapidly.
When next cycle starts, auxiliary switch QA1, auxiliary induction LA1, reset inductance L R1 etc. are zero current turning-ons, buffering diode DH1, booster diode DA1, reset diode DR1 etc. are zero-current switchings, they all have shorter electric current and pass through the time, current effective value is low, so there is lower loss.
Hereinafter the course of work of all kinds Zero voltage transition pulse width modulated inverter of each embodiment is similar, by no longer repeat specification.
Embodiment two, Buck type Zero voltage transition pulse width modulated inverter
As shown in Figure 2, the Buck type Zero voltage transition pulse width modulated inverter of the embodiment of the present invention, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS2, main switch Q2, filter inductance L2, main diode D2, filter capacitor CF2 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA2, auxiliary switch QA2, buffering diode DH2, booster diode DA2, auxiliary capacitor CA2 etc.
Described main switch Q2 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS2, and its source electrode connects the negative electrode of main diode D2; The anode of described main diode D2 connects the negative pole of input power VS2, the negative pole etc. of filter capacitor CF2, and its negative electrode connects the positive pole of filter capacitor CF2 by filter inductance L2; Output voltage VO 2 is drawn from the positive pole of filter capacitor CF2, negative pole two ends.
Described auxiliary switch QA2 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of above-mentioned main switch Q2, and its source electrode connects the source electrode of above-mentioned main switch Q2 by auxiliary induction LA2; The anode of described booster diode DA2 connects the anode of above-mentioned main diode D2, and its negative electrode connects the anode of buffering diode DH2; The two poles of the earth of described auxiliary capacitor CA2 connect the anode of buffering diode DH2, the source electrode of main switch Q2 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR2, reset inductance L R2, reset diode DR2; The two poles of the earth of described reset capacitance CR2 connect the source electrode of auxiliary switch QA2, the negative electrode of buffering diode DH2 respectively; The anode of described reset diode DR2 connects the negative electrode of buffering diode DH2 by reset inductance L R2, its negative electrode connects the drain electrode of above-mentioned auxiliary switch QA2.
Embodiment three, Buck/Boost type Zero voltage transition pulse width modulated inverter
As shown in Figure 3, the Buck/Boost type Zero voltage transition pulse width modulated inverter of the embodiment of the present invention, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS3, main switch Q3, energy storage inductor L3, main diode D3, filter capacitor CF3 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA3, auxiliary switch QA3, buffering diode DH3, booster diode DA3, auxiliary capacitor CA3 etc.
Described main switch Q3 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS3, and its source electrode connects the negative electrode of main diode D3; Described energy storage inductor L3 two ends connect the negative electrode of main diode D3, the positive pole of filter capacitor CF3 respectively; The positive pole of described filter capacitor CF3 also connects the negative pole of input power VS3, and its negative pole connects the anode of main diode D3; Output voltage VO 3 is drawn from the positive pole of filter capacitor CF3, negative pole two ends.
Described auxiliary switch QA3 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of above-mentioned main switch Q3, and its source electrode connects the source electrode of above-mentioned main switch Q3 by auxiliary induction LA3; The anode of described booster diode DA3 connects the anode of above-mentioned main diode D3, and its negative electrode connects the anode of buffering diode DH3; The two poles of the earth of described auxiliary capacitor CA3 connect the anode of buffering diode DH3, the source electrode of main switch Q3 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR3, reset inductance L R3, reset diode DR3; The two poles of the earth of described reset capacitance CR3 connect the source electrode of auxiliary switch QA3, the negative electrode of buffering diode DH3 respectively; The anode of described reset diode DR3 connects the negative electrode of buffering diode DH3 by reset inductance L R3, its negative electrode connects the drain electrode of above-mentioned auxiliary switch QA3.
Embodiment four, Cuk type Zero voltage transition pulse width modulated inverter
As shown in Figure 4, the Cuk type Zero voltage transition pulse width modulated inverter of the embodiment of the present invention, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS4, boost inductance L4, main switch Q4, capacitance CB4, main diode D4, filter inductance LF4, filter capacitor CF4 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA4, auxiliary switch QA4, buffering diode DH4, booster diode DA4, auxiliary capacitor CA4 etc.
Described main switch Q4 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS4 by boost inductance L4, and its source electrode connects the negative pole of input power VS4; The anode of described main diode D4 is connected to the drain electrode of main switch Q4, is also connected to the negative pole of filter capacitor CF4 by filter inductance LF4, and its negative electrode connects the positive pole of filter capacitor CF4; The two ends of described capacitance CB4 connect the source electrode of main switch Q4, the positive pole of filter capacitor CF4 respectively; Output voltage VO 4 is drawn from the positive pole of filter capacitor CF4, negative pole two ends.
Described auxiliary switch QA4 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of main switch Q4 by auxiliary induction LA4, its source electrode connects the source electrode of main switch Q4; The anode of described booster diode DA4 connects the negative electrode of buffering diode DH4, and its negative electrode connects the negative electrode of above-mentioned main diode D4; The two poles of the earth of described auxiliary capacitor CA4 connect the negative electrode of buffering diode DH4, the drain electrode of above-mentioned main switch Q4 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR4, reset inductance L R4 and reset diode DR4 etc.; The two poles of the earth of described reset capacitance CR4 connect the drain electrode of above-mentioned auxiliary switch QA4, the anode of above-mentioned buffering diode DH4 respectively; The anode of described reset diode DR4 connects the source electrode of above-mentioned auxiliary switch QA4, and its negative electrode is connected to the anode of above-mentioned buffering diode DH4 by reset inductance L R4.
Embodiment five, Sepic type Zero voltage transition pulse width modulated inverter
As shown in Figure 5, the Sepic type Zero voltage transition pulse width modulated inverter of the embodiment of the present invention, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS5, boost inductance L5, main switch Q5, capacitance CB5, energy storage inductor LF5, main diode D5, filter capacitor CF5 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA5, auxiliary switch QA5, buffering diode DH5, booster diode DA5, auxiliary capacitor CA5 etc.
Described main switch Q5 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS5 by boost inductance L5, and its source electrode connects the negative pole of input power VS5; The anode of described main diode D5 is connected to the drain electrode of main switch Q5, is also connected the negative pole of filter capacitor CF5 by energy storage inductor LF5, and its negative electrode connects the positive pole of filter capacitor CF5; The two ends of described capacitance CB5 connect the source electrode of main switch Q5, the negative pole of filter capacitor CF5 respectively; Output voltage VO 5 is drawn from the positive pole of filter capacitor CF5, negative pole two ends.
Described auxiliary switch QA5 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of main switch Q5 by auxiliary induction LA5, its source electrode connects the source electrode of main switch Q5; The anode of described booster diode DA5 connects the negative electrode of buffering diode DH5, and its negative electrode connects the negative electrode of above-mentioned main diode D5; The two poles of the earth of described auxiliary capacitor CA5 connect the negative electrode of buffering diode DH5, the drain electrode of above-mentioned main switch Q5 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR5, reset inductance L R5 and reset diode DR5 etc.; The two poles of the earth of described reset capacitance CR5 connect the drain electrode of above-mentioned auxiliary switch QA5, the anode of above-mentioned buffering diode DH5 respectively; The anode of described reset diode DR5 connects the source electrode of above-mentioned auxiliary switch QA5, and its negative electrode is connected to the anode of above-mentioned buffering diode DH5 by reset inductance L R5.
Embodiment six, Zeta type Zero voltage transition pulse width modulated inverter
As shown in Figure 6, the Zeta type Zero voltage transition pulse width modulated inverter of the embodiment of the present invention, it mainly comprises:
Main circuit and auxiliary circuit; Wherein main circuit is made up of input power VS6, main switch Q6, energy storage inductor L6, capacitance CB6, main diode D6, filter inductance LF6, filter capacitor CF6 etc.; Wherein auxiliary circuit is made up of auxiliary induction LA6, auxiliary switch QA6, buffering diode DH6, booster diode DA6, auxiliary capacitor CA6 etc.
Described main switch Q6 is N channel power field effect transistor, and its drain electrode is connected to the positive pole of input power VS6, and its source electrode connects the negative electrode of main diode D6; Described energy storage inductor L6 two ends connect the negative pole of input power VS6, the negative electrode of main diode D6 respectively; The anode of described main diode D6 connects the negative pole of filter capacitor CF6, and its negative electrode is also connected to the positive pole of filter capacitor CF6 by filter inductance LF6; Described capacitance CB6 two ends connect the negative pole of input power VS6, the negative pole of filter capacitor CF6 respectively; Output voltage VO 6 is drawn from the positive pole of filter capacitor CF6, negative pole two ends.
Described auxiliary switch QA6 is also N channel power field effect transistor, and its drain electrode connects the drain electrode of above-mentioned main switch Q6, and its source electrode connects the source electrode of above-mentioned main switch Q6 by auxiliary induction LA6; The anode of described booster diode DA6 connects the anode of above-mentioned main diode D6, and its negative electrode connects the anode of buffering diode DH6; The two poles of the earth of described auxiliary capacitor CA6 connect the anode of buffering diode DH6, the source electrode of main switch Q6 respectively.
Also comprise reset circuit, described reset circuit is made up of reset capacitance CR6, reset inductance L R6, reset diode DR6; The two poles of the earth of described reset capacitance CR6 connect the source electrode of auxiliary switch QA6, the negative electrode of buffering diode DH6 respectively; The anode of described reset diode DR6 connects the negative electrode of buffering diode DH6 by reset inductance L R6, its negative electrode connects the drain electrode of above-mentioned auxiliary switch QA6.
Above-mentioned 6 kinds of Zero voltage transition pulse width modulated inverters, can also do some adjustment, it is characterized in that:
1, in Zero voltage transition pulse width modulated inverter, have the operating mode of conducting at main switch under, with mechanical contact by reset capacitance the two poles of the earth short circuit;
2, in Zero voltage transition pulse width modulated inverter, also comprise Absorption Capacitance, described Absorption Capacitance two ends connect drain electrode, the source electrode of main switch respectively, simultaneous buffering diode short circuit, and auxiliary capacitor is not installed;
3, in Zero voltage transition pulse width modulated inverter, all diodes are fast recovery diodes, Ultrafast recovery diode, Schottky diode etc.;
4, in Zero voltage transition pulse width modulated inverter, whole switching tube or part are used instead: npn power transistor, PNP power transistor, igbt, then anti-paralleled diode, or P channel power field effect transistor;
5, in Zero voltage transition pulse width modulated inverter, the capacity of reset capacitance is 2 to 10 times of auxiliary capacitor capacity.Like this can the voltage ratio of both reasonable distribution, reduce the back-pressure requirement to auxiliary switch.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS1, boost inductance L1, main switch Q1, main diode D1, filter capacitor CF1; Wherein, the hot end of main switch Q1 is connected to the positive pole of input power VS1 by boost inductance L1, and its cold end connects the negative pole of input power VS1; The anode of main diode D1 connects the hot end of main switch Q1, and its negative electrode connects the positive pole of filter capacitor CF1, and filter capacitor CF1 negative pole connects the negative pole of power supply VS1; Output voltage VO 1 is drawn from the positive pole of filter capacitor CF1, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA1, auxiliary switch QA1, buffering diode DH1, auxiliary capacitor CA1, booster diode DA1; Wherein, the hot end of auxiliary switch QA1 connects the hot end of main switch Q1 by auxiliary induction LA1, its cold end connects the cold end of main switch Q1; The anode of booster diode DA1 connects the negative electrode of buffering diode DH1, and the negative electrode of booster diode DA1 connects the negative electrode of main diode D1; The two poles of the earth of auxiliary capacitor CA1 connect the negative electrode of buffering diode DH1, the hot end of main switch Q1 respectively;
Described reset circuit comprises reset capacitance CR1, reset inductance L R1 and reset diode DR1; Wherein, the two poles of the earth of reset capacitance CR1 connect the hot end of auxiliary switch QA1, the anode of buffering diode DH1 respectively; The cold end of the auxiliary switch QA1 of the anode connection of reset diode DR1, its negative electrode is connected to the DH1 anode of buffering diode by reset inductance L R1.
2. Boost type Zero voltage transition pulse width modulated inverter as claimed in claim 1, is characterized in that, have the operating mode of conducting at main switch Q1 under, with the two poles of the earth short circuit of mechanical contact by reset capacitance CR1.
3. Boost type Zero voltage transition pulse width modulated inverter as claimed in claim 1 or 2, it is characterized in that, also comprise Absorption Capacitance, the two poles of the earth of described Absorption Capacitance connect hot end, the cold end of main main switch Q1 respectively, simultaneous buffering diode DH1 short circuit, auxiliary capacitor CA1 does not install.
4. Boost type Zero voltage transition pulse width modulated inverter as claimed in claim 1 or 2, it is characterized in that, the capacity of reset capacitance CR1 is 2 to 10 times of the capacity of auxiliary capacitor CA1.
5. Boost type Zero voltage transition pulse width modulated inverter as claimed in claim 1 or 2, it is characterized in that, main switch Q1, auxiliary switch QA1 are igbt, or npn power transistor, or the PNP power transistor of anti-paralleled diode; Or P channel power field effect transistor; Main diode D1, buffering diode DH1, booster diode DA1, reset diode DR1 are fast recovery diodes, or Ultrafast recovery diode, or Schottky diode.
6. a Buck type Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS2, main switch Q2, main diode D2, filter inductance L2, filter capacitor CF2; Wherein, the hot end of main switch Q2 is connected to the positive pole of input power VS2, and its cold end connects the negative electrode of main diode D2; The anode of main diode D2 connects the negative pole of input power VS2, and its negative electrode connects the positive pole of filter capacitor CF2 by filter inductance L2, and filter capacitor CF2 negative pole connects the negative pole of power supply VS2; Output voltage VO 2 is drawn from the positive pole of filter capacitor CF2, negative pole two ends;
Described auxiliary circuit comprises auxiliary switch QA2, auxiliary induction LA2, buffering diode DH2, auxiliary capacitor CA2, booster diode DA2; Wherein, the hot end of auxiliary switch QA2 connects the hot end of main switch Q2, and its cold end connects the cold end of main switch Q2 by auxiliary induction LA2; The anode of booster diode DA2 connects the anode of above-mentioned main diode D2, and its negative electrode connects the anode of buffering diode DH2; The two poles of the earth of auxiliary capacitor CA2 connect the anode of buffering diode DH2, the cold end of main switch Q2 respectively;
Described reset circuit comprises reset capacitance CR2, reset inductance L R2 and reset diode DR2; Wherein, the two poles of the earth of reset capacitance CR2 connect the cold end of auxiliary switch QA2, the negative electrode of buffering diode DH2 respectively; The anode of reset diode DR2 connects the negative electrode of buffering diode DH2 by reset inductance L R2, its negative electrode connects the hot end of auxiliary switch QA2.
7. a Buck/Boost type Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS3, main switch Q3, energy storage inductor L3, main diode D3, filter capacitor CF3; Wherein, the hot end of main switch Q3 is connected to the positive pole of input power VS3, and its cold end connects the negative pole of input power VS3 by energy storage inductor L3; The anode of main diode D3 connects the negative pole of filter capacitor CF3, and its negative electrode connects the cold end of main switch Q3, and the positive pole of filter capacitor CF3 connects the negative pole of input power VS3; Output voltage VO 3 is drawn from the positive pole of filter capacitor CF3, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA3, auxiliary switch QA3, buffering diode DH3, auxiliary capacitor CA3, booster diode DA3, wherein, the hot end of auxiliary switch QA3 connects the hot end of main switch Q3, and its cold end connects the cold end of main switch Q3 by auxiliary induction LA3; The anode of booster diode DA3 connects the anode of main diode D3, and its negative electrode connects the anode of buffering diode DH3; The two poles of the earth of auxiliary capacitor CA3 connect the anode of buffering diode DH3, the cold end of main switch Q3 respectively;
Described reset circuit comprises reset capacitance CR3, reset inductance L R3 and reset diode DR3; Wherein, the two poles of the earth of reset capacitance CR3 connect the cold end of auxiliary switch QA3, the negative electrode of buffering diode DH3 respectively; The anode of reset diode DR3 connects the negative electrode of buffering diode DH3 by reset inductance L R3, its negative electrode connects the hot end of auxiliary switch QA3.
8. a Cuk type Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS4, boost inductance L4, main switch Q4, capacitance CB4, main diode D4, filter inductance LF4, filter capacitor CF4; Wherein the hot end of main switch Q4 is connected to the positive pole of input power VS4 by boost inductance L4, and its cold end connects the negative pole of input power VS4; The anode of main diode D4 is connected to the hot end of main switch Q4, is also connected to the negative pole of filter capacitor CF4 by filter inductance LF4, and its negative electrode connects the positive pole of filter capacitor CF4; The two ends of capacitance CB4 connect the cold end of main switch Q4, the positive pole of filter capacitor CF4 respectively; Output voltage VO 4 is drawn from the positive pole of filter capacitor CF4, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA4, auxiliary switch QA4, buffering diode DH4, auxiliary capacitor CA4, booster diode DA4; The hot end of auxiliary switch QA4 connects the hot end of main switch Q4 by auxiliary induction LA4, its cold end connects the cold end of main switch Q4; The anode of booster diode DA4 connects the negative electrode of buffering diode DH4, and its negative electrode connects the negative electrode of main diode D4; The two poles of the earth of auxiliary capacitor CA4 connect the negative electrode of buffering diode DH4, the hot end of main switch Q4 respectively;
Described reset circuit comprises reset capacitance CR4, reset inductance L R4 and reset diode DR4; Wherein, the two poles of the earth of reset capacitance CR4 connect the hot end of auxiliary switch QA4, the anode of buffering diode DH4 respectively; The anode of reset diode DR4 connects the cold end of auxiliary switch QA4, and its negative electrode is connected to the anode of buffering diode DH4 by reset inductance L R4.
9. a Sepic type Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS5, boost inductance L5, main switch Q5, capacitance CB5, energy storage inductor LF5, main diode D5, filter capacitor CF5; Wherein, the hot end of main switch Q5 is connected to the positive pole of input power VS5 by boost inductance L5, and its cold end connects the negative pole of input power VS5; The anode of main diode D5 is connected to the hot end of main switch Q5, is also connected the negative pole of filter capacitor CF5 by energy storage inductor LF5, and its negative electrode connects the positive pole of filter capacitor CF5; The two ends of capacitance CB5 connect the cold end of main switch Q5, the negative pole of filter capacitor CF5 respectively; Output voltage VO 5 is drawn from the positive pole of filter capacitor CF5, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA5, auxiliary switch QA5, buffering diode DH5, auxiliary capacitor CA5, booster diode DA5; The hot end of auxiliary switch QA5 connects the hot end of main switch Q5 by auxiliary induction LA5, its cold end connects the cold end of main switch Q5; The anode of booster diode DA5 connects the negative electrode of buffering diode DH5, and its negative electrode connects the negative electrode of main diode D5; The two poles of the earth of auxiliary capacitor CA5 connect the negative electrode of buffering diode DH5, the hot end of main switch Q5 respectively;
Described reset circuit comprises reset capacitance CR5, reset inductance L R5 and reset diode DR5; Wherein, the two poles of the earth of reset capacitance CR5 connect the hot end of auxiliary switch QA5, the anode of buffering diode DH5 respectively; The anode of reset diode DR5 connects the cold end of auxiliary switch QA5, and its negative electrode is connected to the anode of buffering diode DH5 by reset inductance L R5.
10. a Zeta type Zero voltage transition pulse width modulated inverter, is characterized in that, comprises main circuit, auxiliary circuit and reset circuit;
Described main circuit comprises input power VS6, main switch Q6, energy storage inductor L6, capacitance CB6, main diode D6, filter inductance LF6, filter capacitor CF6; Wherein, the hot end of main switch Q6 is connected to the positive pole of input power VS6, and its cold end connects the negative pole of input power VS6 by energy storage inductor L6; The anode of main diode D6 connects the negative pole of filter capacitor CF6, and its negative electrode connects the cold end of main switch Q6, and its negative electrode is also connected to the positive pole of filter capacitor CF6 by filter inductance LF6; Capacitance CB6 two ends connect the negative pole of input power VS6, the negative pole of filter capacitor CF6 respectively; Output voltage VO 6 is drawn from the positive pole of filter capacitor CF6, negative pole two ends;
Described auxiliary circuit comprises auxiliary induction LA6, auxiliary switch QA6, buffering diode DH6, auxiliary capacitor CA6, booster diode DA6; Wherein, the hot end of auxiliary switch QA6 connects the hot end of main switch Q6, and its cold end connects the cold end of main switch Q6 by auxiliary induction LA6; The anode of booster diode DA6 connects the anode of main diode D6, and its negative electrode connects the anode of buffering diode DH6; The two poles of the earth of auxiliary capacitor CA6 connect the anode of buffering diode DH6, the cold end of main switch Q6 respectively;
Described reset circuit comprises reset capacitance CR6, reset inductance L R6 and reset diode DR6; Wherein, the two poles of the earth of reset capacitance CR6 connect the cold end of auxiliary switch QA6, the negative electrode of buffering diode DH6 respectively; The anode of reset diode DR6 connects the negative electrode of buffering diode DH6 by reset inductance L R6, its negative electrode connects the hot end of auxiliary switch QA6.
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| CN201410218604.3A CN105099177A (en) | 2014-05-22 | 2014-05-22 | Zero-voltage conversion pulse width modulation converter |
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| CN1299179A (en) * | 2000-12-21 | 2001-06-13 | 深圳市华为电气技术有限公司 | Soft switching method for power switching transistor of DC converter and soft-switching DC converter |
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| CN1299179A (en) * | 2000-12-21 | 2001-06-13 | 深圳市华为电气技术有限公司 | Soft switching method for power switching transistor of DC converter and soft-switching DC converter |
| CN103780087A (en) * | 2014-01-23 | 2014-05-07 | 深圳市科陆电子科技股份有限公司 | Zero-voltage switching pulse-width modulation converter |
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Address after: 518000 Nanshan District science and Technology Park, Guangdong, Southern District, building T2, building, floor, 5 Applicant after: Kelu Electronic Science-Technology Co., Ltd., Shenzhen Applicant after: SHENZHEN CLOU DRIVE TECHNOLOGY CO., LTD. Applicant after: Shenzhen CLOU Intelligent Industry Co., Ltd. Address before: 518000 Nanshan District science and Technology Park, Guangdong, Southern District, building T2, building, floor, 5 Applicant before: Kelu Electronic Science-Technology Co., Ltd., Shenzhen Applicant before: SHENZHEN CLOU DRIVE TECHNOLOGY CO., LTD. Applicant before: Shenzhen Kelu Power Tech. Co., Ltd. |
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Application publication date: 20151125 |