TWM400649U - Staggered series input parallel output times flow multiplication rectification zero voltage switched converter - Google Patents

Description

M400649 V. New description: [New technology field] [0001] This author is about an interleaved series input parallel output current-rectifying zero-voltage switching converter, especially the average current on the secondary side of a transformer. Half of the output current can effectively reduce the power loss, and has a destructive effect on the output current chopping, which reduces the output current ripple, thereby reducing the filtering requirements, and interleaving series connection with more practical utility characteristics in its overall implementation. Innovative designer of input parallel output double current rectification zero voltage switching converter. [Prior Art] [0002] According to recent years, semiconductor technology is booming. Power converters in systems such as aerospace, communications, and computers all have high current and high power specifications, while high current outputs will cause magnetic components and semiconductors. The power loss and thermal stress of the component, as well as the increase of the output voltage ripple, must increase the volume of the filter. In addition, due to the decreasing oil source, the awareness of environmental protection is so high that the issue of energy saving and carbon saving is highly valued globally. Therefore, designing high-efficiency power conversion appliances is an important topic of power electronics. [0003] Among them, please refer to the circuit diagram shown in the tenth figure, and propose a dual interleaved active clamp forward converter with automatic charging balance adjustment function, which must use two additional sets of windings. The common clamping function is realized by sharing a capacitor. Therefore, the transformer is complicated to manufacture. Because the converter lacks the design of the resonant inductor, zero voltage switching [ZVS] cannot be guaranteed, but the leakage inductance on the primary side of the transformer will cause the voltage on the switch to burst. The wave, which causes the high voltage stress of the switch, is a form number A0101 page 3/23 page M400649. The snubber circuit must be additionally added. [0004] In addition, please refer to the other circuit diagram shown in Figure H, which also proposes an interleaved forward converter with double current rectification and flexible switching, using the clamping circuit and the magnetizing inductance of the transformer and The resonant inductor achieves zero voltage switching [ZVS] function to improve efficiency. The two sets of active clamp forward converters are realized by parallel input and parallel output architecture. The feature is that only two active switches are used, and the two are mutually The auxiliary switch is used to achieve the function of zero voltage switching [ZVS]. The interleaved switching makes the output inductor current reduce the current speed of the output capacitor, but the voltage stress of the switch exceeds the input voltage. [0005] The reason is that, in view of this, the creators have been researching and improving the existing structure and lack of experience in the rich design and development of the relevant industries for many years, creating an "interlaced series input parallel output zero voltage switching The converter of the type, and obtained the patent No. M3 7 2 9 9 of the new type of China, and now, for the aforementioned new patent No. 3 7 2 9 9 7 , the output rectification side is a half-wave rectification filter circuit. It will cause serious loss of rectification and affect the efficiency. In particular, an interleaved series input parallel output double current rectification zero voltage switching converter is provided to achieve better practical value. [New content] [0006] The interleaved series input parallel output double current rectification zero voltage switching converter of this creation, the circuit structure is composed of two sets of active clamp forward converter plus double current rectification technology, in series input And the connection mode of the parallel output, so that the switch on the primary side can achieve zero voltage switching, and the switching stress can be less than the input voltage value, and use the current doubler rectification technology, so that the form number Α0101 page 4 / 23 page its on resistance Very small, can greatly reduce the conduction loss, and thus increase the overall conversion efficiency, and the average current on the secondary side of the transformer is half of the output current, which can effectively reduce the loss, and has a destructive effect on the output current chopping, thereby reducing the filtering requirements. This makes the output current ripple lower, and it has more practical utility characteristics in its overall implementation. [Embodiment] [0007] In order to make the technical content, the purpose of creation and the effect achieved by the creation of this creation more complete and clear, it is explained in detail below, and please refer to the illustrated figure and Drawing No.: [0008] First, please refer to the circuit diagram of the first picture. The converter (1) of this creation is composed of two sets of active clamp forward converters (^^), (12) plus Synchronous rectification technology consists of a series input and a parallel output connection; where: [0009] Form No. A0101 The lower active clamp (four) direction converter (ii) is provided with an input capacitor C ii 'in the input capacitor ci The first end is connected to the first end of the main switch Sml, the positive end of the main body and the second end of the resonant capacitor C ri, the second end of the main switch i, the negative electrode of the body two ml and the resonance The second end of the capacitor is simultaneously connected to the home capacitor Ί-end point, the first end point of the magnetization red mi, and the second side end point of the transformer, and the input capacitor C.: The second terminal is simultaneously connected to the auxiliary switch s "the first end, the negative pole of the body f pole D31 and The first-end of the inductor Lr, at the same time, the input AC AC t Ί end is also connected with the upper active single-directional converter ((1) the second end of the input capacitor ci2, the auxiliary switch s =-end and the body two The positive pole of the pole Zhao Da2 is connected, and the heart is page 5 / 23 pages and the clamp power; 1: the second end of the second! and the body diode D "the two end points respectively 'electricity: point two connection: the The first-direction converter of the resonant inductor Lr (12; the «^ point and the upper active source are connected to the first end of the inductor L μ 12 , and the drain -11 end is connected to the second end of the magnetizing inductance L and夂压益' - the second side of the secondary side is connected, the other is the transformer D: the first double current rectification switch ~ 12 of the first two '12 of the - end of the phase connection' and the _ secondary side ^ The first point - connected to the first end of the double current rectification switch - the end point and the leakage inductance L first end 'the current double rectifier switch S, s = the end point and the output capacitance c. The first two two R The first end point is connected, and the leakage inductance L, l end:: _ capacitor C° second end point and load impedance R second [0010]

The side main Γ ί upper active clamp forward converter (ι2) corresponds to the lower flute forward converter (H), and its input capacitor C 1 point is simultaneously connected to the main switch Sm2 - end 'body The negative end of the second s m2 and the first end of the resonant capacitor cr2, the second end of the main switch cm2, the positive pole of the body dipole intercept Dm2 and the second end of the resonant capacitor ^ simultaneously with the clamp capacitor ^ The first end point, the magnetic phase far = the first end point of Lm2 and the first end point of the changer 72 - the second side of the sub-terminal = connect 'and the second end of the input capacitor C12 is simultaneously connected to the auxiliary open feeling ι / i The end point, the positive end of the Zhao Dijili D a2 and the first end of the resonant power, and the input capacitor C and the lower active clamp forward converter (1 1) are input into the capacitor c : Form No. A0101 Page 6 of 23 Second End of M400649, Auxiliary Switch s

The negative pole of the " is connected, and the auxiliary diode s. and the 'diode D body diode D ^ brother one end and the negative pole of the 32 are simultaneously connected with the clamp capacitor, the resonant inductor L The first point of the first H 2 first point of phase r is respectively connected with the leakage end point and the lower side active clamp position of the factory 12 L "one" conversion Jie (11) leakage inductance]! The first -% point connection , leakage inductance magnetization inductance L 夕油 2 first - the knowledge point is the same as the point phase, the table ί, 2 changer ^ - the second side of the secondary side, the connection, the other transformer T ^ ~ ± Μ ^ ^ c 2 One - the human side - the end point is connected to the double current rectification, the +-end of the +R22 and the first end of the leakage inductance l22

And the second end of the second side of the transition voltage T 2 and the first end of the double current rectification switch SR 2 2 Sr2i are simultaneously with the first end of the output capacitor C0 and the first end of the load impedance ruler The first end of the inductor L22 L21 is connected to the second end of the output capacitor c〇 and the second end of the load impedance gauge. As shown in the circuit diagram of another embodiment of the second drawing, the current double rectifier switch s XS , 、 , R12 R 1 1 ^ R 2 2 SR 2 1 can be a power switch and its body diode For the composition, or please refer to the circuit diagram of another embodiment of the third drawing, the double current rectifying switch S „ , S , SR 1 2 ° r 1 1 b diode. The first end of 21 The point and the leakage inductance l21 are connected to the end point, and the double R current rectification switch s [0011] R 2 2 SR2i can be directly [0012] such that two sets of active clamp forward converters (1 1 ), 1 2) The secondary side of the transformer T丨 and T adopts double current rectification technology, SR21^

Its double current rectification switch s D , . , s , SR 1 2 R 1 1 R 2 2 The on-resistance is very small, which can greatly reduce the conduction loss. In addition, the double-flux form number A0101 page 7 / 23 pages M400649 flow has output inductor current chopping cancellation The function can reduce the chopping of the output voltage, that is, the average current on the second of the voltage HT〆% is half of the output current, which can effectively reduce the τ丄 and loss of the transformer, thereby increasing the overall conversion efficiency. [0013] So, please refer to the fourth picture of the main switch Sml zero voltage switching (ZVS) waveform diagram, the fifth picture of the original switch ^ zero voltage switching (z VS) waveform ϋ, the sixth picture The zero voltage switching (zvs) waveform diagram of the creation auxiliary switch sal and the seventh diagram The zero voltage switching (zvs) waveform diagram of the creation auxiliary switch sa2 is shown in the vin-400V, full load p〇=240W, the main switch Lu (1)

Sm2 and auxiliary switch Sai's. Cross pressure s,

S 3 1 3 2 ml'VDS m2, VDS and Sal, VDS, Sa2 vDs both drop to zero, drive signal s

S Π1 1 1 V g S , only switch to o ·>

M2, Vgs and Sal, Vg, achieve zero voltage switching (Z V S) performance. The cross-voltage is less than Vin, max, which is in accordance with the input voltage of the authoring converter (1) and the switching element has low voltage stress. [0014] In addition, please refer to the eighth figure, the inductor current chopping cancellation performance diagram of the creation current doubler rectification, when vi η = 4 Ο Ο V, full load P 〇 = 2 4 〇 W, the output inductor current il丄, i [Upper 2 chopping inversion, so that the output current i〇i=iLii+i^ 2 can make the current ripple canceled'

Reduce the size of the continuous wave; and 'Please refer to the ninth figure. The current interlaced current chopping cancellation performance graph shows that when V . = 4 Ο Ο V and full load P ηη Ο = 2 4 0 W, The current band = i 〇丄 + 丄 can cancel the chopping of 1 and 1 〇 2 again, and reduce the current chopping of the output capacitor. Page 8 of 23 Form No. A0101 M400649 [0015] By the above, the composition of the authoring structure and the implementation description show that the present invention can achieve zero switching of the power switch in comparison with the existing structure. In addition to the low voltage stress of the power switch, this creation mainly replaces the half-wave rectifier circuit with a double current rectifier circuit. Therefore, the average current on the secondary side of the transformer is half of the output current, which can effectively reduce the power loss and the current in the turn-off. The wave has a destructive effect, which reduces the ripple of the wheel current, which in turn reduces the filtering requirements. In addition, when the double current rectification switch further uses the power switch, since its on-resistance is very small, the conduction loss can be greatly reduced, thereby increasing the overall conversion efficiency, and the utility model is further enhanced in practical use. [0016] The foregoing embodiments or drawings are not intended to limit the scope of the present invention, and any suitable variations or modifications may be made without departing from the scope of the invention. [0017] In summary, the present embodiment can achieve the expected use efficiency, and the specific structure disclosed therein has not been seen in the same product, nor has it been disclosed before the application, and has completely complied with the patent law. The regulations and requirements, the application for a new type of patent in accordance with the law, the application for review, and the grant of a patent, are really sensible. BRIEF DESCRIPTION OF THE DRAWINGS [0018] First: Circuit diagram of the present creation [0019] Second diagram: Circuit diagram of another embodiment of the present creation [0020] Third diagram: Circuit diagram of another embodiment of the present creation [0021] The fourth picture: the zero voltage switching (ZVS) wave of the main switch S n of this creation, the form number A0101, page 9 / 23 pages M400649 [0022] The fifth picture: zero voltage switching of the main switch S m 2 of this creation (z V s ) Waveform Diagram [0023] Figure 6: Zero Voltage Switching (ZVS) of the Creative Auxiliary Switch S n 3丄 Waveform Diagram [0024] Figure 7: Zero Voltage Switching of ZS Assist Switch S σ (ZVS Waveform diagram [0025] Figure 8: Inductive current chopping destructive performance graph of the current double current rectification [0026] Ninth diagram: Interleaved current chopping cancellation performance graph of this creation [0027] Tenth map: Existing Circuit Architecture Diagram [0028] Figure 11: Existing Circuit Architecture Diagram [Main Component Symbol Description] [0029] (1) Converter [0030] (1 1 ) Active Clamp Forward Converter [ 0031] ( 1 2 ) Active Clamp Forward Converter Form No. Α0101 Page 10 of 23

Claims (1)

M400649 VI. Patent application scope: 1. An interleaved series input parallel output double current rectification zero voltage switching converter 'converter (1) is composed of two sets of active clamp forward converters (completed), (12) In addition to the double current rectification technology, it is composed of a series input and a parallel output connection; wherein: the lower active switching forward converter is on the secondary side of the transformer T1 and the double current rectification switch s R i 2 The first end point of the first terminal and the leakage inductance L 1 2 are connected, and the second end of the secondary side of the transformer T is The first-end point of the double current rectifying switch S r 1 1 and the first end point of the leakage inductance L i i are connected. The second end point of the current double-rectifying switching sRi2 and Srii is simultaneously connected to the output capacitor c. The first end point and the load impedance are only connected to the first end point. 'The leakage inductance L ", the second end point of L 1 1 and the second end point of the output electric valley C 〇 and the load impedance R The second terminal is connected; and the upper active clamp forward converter is at the first end of the secondary side of the transformer τ and the first end of the double current rectifying switch SR22 and the 2 leakage The first end of the sense L 2 2 is connected, and the second end of the secondary side of the transformer T 2 is connected to the first end of the double current rectifying switch SR2i and the first end of the leakage inductance L 2丄, The second end of the double current rectification switch s, s R 2 2 R 2 1 is simultaneously connected with the first end of the output capacitor c 及 and the first end of the load impedance R, and the leakage inductance l22, L21 The second endpoint is connected to the output capacitor C. The second end is connected to the second end of the load impedance 5^. The interleaved serial input parallel output current-rectifying zero-voltage switching converter according to claim 1, wherein the double current rectification switch s R 1 2 is a power switch, and the SR22 and sR2i are power switches. 099219676 Form No. A0101 Page 11 of 23 0992060764-0 M400649 R 1 Interleaved series input parallel output double current rectification zero voltage switching converter according to claim 1 of the patent application scope, wherein the current double rectifier switch s 2. sR11, sR22, and sR21 are diodes. 099219676 Form No. A0101 Page 12 of 23 0992060764-0