CN109905032A - A kind of low-pressure high-power power circuit, circuit board and device - Google Patents
A kind of low-pressure high-power power circuit, circuit board and device Download PDFInfo
- Publication number
- CN109905032A CN109905032A CN201910216557.1A CN201910216557A CN109905032A CN 109905032 A CN109905032 A CN 109905032A CN 201910216557 A CN201910216557 A CN 201910216557A CN 109905032 A CN109905032 A CN 109905032A
- Authority
- CN
- China
- Prior art keywords
- circuit
- transformer
- connect
- signal
- full
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The embodiment of the present application discloses a kind of low-pressure high-power power circuit, circuit board and device, the circuit includes sequentially connected filter circuit, full-wave rectifying circuit, PFC (Power Factor Correcti on, PFC) circuit, full-bridge resonance circuit and circuit of synchronous rectification；The full-bridge resonance circuit includes multiple transformers, wherein the signal of the pfc circuit output is input to the multiple transformer, and the primary side of the multiple transformer is connected in series, the secondary side parallel output of the multiple transformer.The ability that electric power outputting current can be expanded by the embodiment of the present application improves the output power of power supply.
Description
Technical field
The present invention relates to switch power technology field more particularly to a kind of low-pressure high-power power circuits, circuit board and dress
It sets.
Background technique
The development of electronic technology, so that the operating voltage of circuit is lower and lower, electric current is increasing.Such as it is answered in block chain
The fields such as large power supply and Laser Power Devices in need the power supply product of low-voltage and high-current high reliability.For low pressure
The output scheme of high current, general scheme are but traditional LLC using LLC resonant converter or phase-shifted full-bridge converter
Controlled resonant converter or phase-shifted full-bridge converter are all that energy transmission is carried out using single phase transformer, transformer connection bridging one or two times
Side, with the promotion of power, volume of transformer just be will increase, and layout is difficult, and single phase transformer transformation efficiency reduces, and calorific value increases
Greatly, heat dissipation is difficult, therefore power supply reliability reduces.
Summary of the invention
The embodiment of the present application provides a kind of low-pressure high-power power circuit, circuit board and device, and it is defeated can to expand power supply
The ability of electric current out convenient for layout, while reducing the temperature of power supply complete machine and improving the reliability of power supply, promotes the output of power supply
Power.
In a first aspect, the embodiment of the present application provides a kind of low-pressure high-power power circuit, which includes being sequentially connected
Filter circuit, full-wave rectifying circuit, PFC (Power Factor Correction, PFC) circuit, full-bridge it is humorous
Shake circuit and circuit of synchronous rectification；
The filter circuit, for filtering high-frequency interferencing signal；
The full-wave rectifying circuit, the AC signal for exporting the filter circuit are converted to the electric current in a direction
Signal output；
The pfc circuit, for improving the voltage of the signal exported from full-wave rectifying circuit, and the compensation raising electricity
The phase difference of electric current and voltage in signal after pressure；
The full-bridge resonance circuit includes multiple transformers, wherein the signal of the pfc circuit output is input to described more
The primary side of a transformer, the multiple transformer is connected in series, the secondary side parallel output of the multiple transformer；
The circuit of synchronous rectification, for the synchronous signal for converting the multiple transformers connected in parallel output.
The embodiment of the present application in full-bridge resonance circuit by using multiple transformers of primary side series connection, secondary side parallel output
Structure can expand the ability of electric power outputting current, and since multiple transformer primary sides are connected, secondary side is in parallel, needed for satisfaction
In the case that signal energy is transmitted, additionally it is possible to the design size of single transformer is reduced, convenient for layout, simultaneously because changeable pressure
The heat dissipation area of device is big, therefore reduces the temperature of power supply complete machine and improve the reliability of power supply, improves the output of power supply
Power.
With reference to first aspect, in the first possible embodiment of first aspect, the full-bridge resonance circuit includes
Sequentially connected full-bridge drive module, switch module and resonance/transformer module.
The possible embodiment of with reference to first aspect the first, in second of possible embodiment of first aspect
In, the full-bridge drive module includes four driving signal inputs S1, S2, S3 and S4；The switch module includes four the
One field-effect tube Q1, Q2, Q3 and Q4；Resonance/the transformer module includes inductance Lr, capacitor Cr and n transformer Ti, described
Each transformer in n transformer includes primary and secondary side, and the primary side includes primary side winding and primary side inductance, the primary side
Inductance includes magnetizing inductance Lm and leakage inductance Lk, and the magnetizing inductance Lm is connected in parallel with the primary side winding, the leakage inductance
Lk and the primary side winding are connected in series, integer of the value range of the i between [1, n], and the n is more than or equal to 2
Integer；
Wherein, the S1 is connect with the grid of the Q1, and the S2 is connect with the grid of the Q2, the S3 and the Q3
Grid connection, the S4 connect with the grid of the Q4, the Q2 drain and the drain electrode of the Q4 connect and with the PFC
The output end of circuit connects, and the source electrode of the Q2 is connect with the drain electrode of the Q1, and the drain electrode of the source electrode of the Q4 and the Q3 connect
It connects, the source electrode connect and ground of the source electrode of the Q1 and the Q3, the source electrode of the Q2 is also connect with one end of the Lr, described
The other end of Lr is connect with one end of transformer T1, and the source electrode of the Q4 is also connect with one end of the Cr, and the Cr's is another
End is connect with one end of transformer Tn, and the primary side of the n transformer T1 to Tn is connected in series, the n transformer T1 to Tn
Secondary side connect as parallel outputs with the circuit of synchronous rectification.
The possible embodiment of second with reference to first aspect, in the third possible embodiment of first aspect
In, the S1 is identical with the driving signal that the S4 is inputted, and the S2 is identical with the driving signal that the S3 is inputted, the S1 and
The driving signal phase phase difference 180 degree of the S2 input.
The third possible embodiment with reference to first aspect, in the 4th kind of possible embodiment of first aspect
In, the full-bridge resonance circuit includes two resonance frequency frAnd fm, frCalculation formula are as follows:
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, n >=2；
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, Lm=Lm_1+Lm_2
+ ...+Lm_n, n >=2；
The Lk_i is the leakage inductance of the transformer Ti, and the Lm_i is the magnetizing inductance of the transformer Ti.
The possible embodiment of second with reference to first aspect, the third possible embodiment with reference to first aspect
Or the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment of first aspect, the synchronization
Rectification circuit includes 2n synchronous rectification driving input terminal M1_i and M2_i, 2n the second field-effect tube Q1_i and Q2_i, and
2n Schottky diode D1_i and D2_i, wherein the M1_i is connect with the grid of the Q1_i, the M2_i with it is described
The grid of Q2_i connects, and the anode of the D1_i conducting direction is connect with the source electrode of the Q1_i, the D1_i conducting direction
Cathode is connect with the drain electrode of the Q1_i, and the anode of the D2_i conducting direction is connect with the source electrode of the Q2_i, the D2_i
The cathode of conducting direction is connect with the drain electrode of the Q2_i, one end Ns1_i on the secondary side of the drain electrode and transformer Ti of the Q1_i
Connection, the drain electrode of the Q2_i are connect with the other end Ns3_i on the secondary side of the transformer Ti, the intermediate ends of the transformer Ti
Ns2_i is connected together as the output end of rectification circuit, and the source electrode of the 2n the second field-effect tube links together and connects
Ground.
The 5th kind of possible embodiment with reference to first aspect, in the 6th kind of possible embodiment of first aspect
In, the synchronous rectification driving signal of M1_i input is identical, and the synchronous rectification driving signal of M2_i input is identical, and M1_i and M2_i are defeated
The synchronous rectification driving signal phase phase difference 180 degree entered.
Second aspect, the embodiment of the present application provide a kind of printed circuit board, which includes first aspect institute
The circuit stated.
In conjunction with second aspect, in the first possible embodiment of second aspect, the printed circuit board includes one
Secondary side higher-pressure region and secondary side low-pressure area, the n transformer layout is in the secondary side low-pressure area.
The third aspect, the embodiment of the present application provide a kind of device, which includes printed circuit described in second aspect.
In conclusion the embodiment of the present application provides a kind of low-pressure high-power power circuit, circuit board and device, the application
Embodiment in full-bridge resonance circuit by that, using primary side series connection, multiple transformer device structures of secondary side parallel output, can expand
The ability of electric power outputting current, and since the secondary side of multiple transformer primary sides series connection is in parallel, meeting desired signal energy transmission
In the case of, additionally it is possible to the design size of single transformer is reduced, convenient for layout, simultaneously because the heat dissipation area of multiple transformers
Greatly, it therefore reduces the temperature of power supply complete machine and improves the reliability of power supply, improve the output power of power supply.
Detailed description of the invention
Attached drawing needed in the embodiment of the present application will be described below.
Fig. 1 is a kind of structural schematic diagram of low-pressure high-power power circuit provided by the embodiments of the present application；
Fig. 2 is the structural schematic diagram of full-bridge resonance circuit described in Fig. 1；
Fig. 3 is the structural schematic diagram of modules in full-bridge resonance circuit described in Fig. 2；
Fig. 4 is the structural schematic diagram of circuit of synchronous rectification described in Fig. 1；
Fig. 5 is a kind of structural schematic diagram of printed circuit board provided by the embodiments of the present application.
Specific embodiment
The embodiment of the present application provides a kind of low-pressure high-power power circuit, circuit board and device, and the embodiment of the present application is logical
It crosses in full-bridge resonance circuit using primary side series connection, multiple transformer device structures of secondary side parallel output, power supply output can be expanded
The ability of electric current, and since the secondary side of multiple transformer primary sides series connection is in parallel, in the case where meeting desired signal energy transmission, also
The design size of single transformer can be reduced, convenient for layout, simultaneously because the heat dissipation area of multiple transformers is big, therefore is reduced
The temperature of power supply complete machine and the reliability for improving power supply, improve the output power of power supply.
In order to make those skilled in the art more fully understand application scheme, below in conjunction with attached in the embodiment of the present application
Figure, the technical scheme in the embodiment of the application is clearly and completely described.
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram of low-pressure high-power power circuit provided by the embodiments of the present application,
The low-pressure high-power power circuit includes sequentially connected filter circuit 101, full-wave rectifying circuit 102, pfc circuit 103, full-bridge
Resonance circuit 104 and circuit of synchronous rectification 105；
The filter circuit 101 prevents in power grid other equipment to the big function of the low pressure for filtering high-frequency interferencing signal
The interference of rate power circuit；
The full-wave rectifying circuit 102, the AC signal for exporting the filter circuit 101 are converted to a direction
Current signal output；
The pfc circuit 103, for improving the voltage of the current signal exported from full-wave rectifying circuit 102, and compensation
The phase difference of electric current and voltage in signal after the raising voltage, so that increase power factor is to improve the utilization rate of electric power；
The full-bridge resonance circuit 104, including multiple transformers, wherein the signal input that the pfc circuit 103 exports
Primary side to the multiple transformer, the multiple transformer is connected in series, and the secondary side parallel output of the multiple transformer expands
The big fan-out capability of electric current, and since multiple transformer primary sides are connected, secondary side is in parallel, is meeting desired signal energy transmission
In the case of, additionally it is possible to the design size of single transformer is reduced, convenient for layout, simultaneously because the heat dissipation area of multiple transformers
Greatly, it therefore reduces the temperature of power supply complete machine and improves the reliability of power supply, improve the output power of power supply.
The circuit of synchronous rectification 105, for the synchronous signal for converting the multiple transformers connected in parallel output to reduce damage
Consumption improves transfer efficiency.
The filter circuit 101 can be electromagnetic interference (Electro Magnetic Interference, EMI) filtering
Circuit 101, the pfc circuit 103 can be boosting/PFC (boost/Power Factor Correction,
Boost/PFC) circuit.
Low-pressure high-power power circuit provided by the embodiments of the present application is used to the 220V high-voltage signal of input being converted to institute
The low-voltage signal needed is output to powering load in load, and the embodiment of the present application in full-bridge resonance circuit 104 by adopting
With primary side series connection, multiple transformer device structures of secondary side parallel output, the ability of electric power outputting current can be expanded, and due to multiple
Transformer primary side series connection, secondary side is in parallel, in the case where meeting desired signal energy transmission, additionally it is possible to reduce single transformer
Design size simultaneously because the heat dissipation area of multiple transformers is big, therefore reduces the temperature of power supply complete machine convenient for layout and mention
The high reliability of power supply, improves the output power of power supply.
Referring to Fig. 2, full-bridge resonance circuit 104 includes sequentially connected full-bridge drive module 1041, switch module 1042
With resonance/transformer module 1043.
Specifically, the full-bridge drive module 1041 includes four driving signal inputs S1, S2, S3 simultaneously refering to Fig. 3
And S4；The switch module 1042 includes four first field-effect tube Q1, Q2, Q3 and Q4；Resonance/the transformer module includes
Inductance Lr, capacitor Cr and n transformer Ti, each transformer in the n transformer includes primary and secondary side, the primary side
Including primary side winding and primary side inductance, the primary side inductance includes magnetizing inductance Lm and leakage inductance Lk, and the pair is when including secondary
Winding, integer of the value range of the i between [1, n], the n are the integer more than or equal to 2；The transformer Ti's
One end of primary side winding is labeled as Np1_i, and the other end of the primary side winding is labeled as Np2_i；The secondary side of the transformer Ti around
Group includes three terminals, and wherein one end is labeled as Ns1_i, and the other end is labeled as Ns3_i, and intermediate ends are labeled as Ns2_i.It needs
Illustrate be first transformer T1 and n-th of transformer Tn are only depicted in Fig. 3, if n be greater than 2 in the case where, T2 to T
(n-1) primary side of the identical and all transformer of component, structure and the connection type and T1 or Tn of the composition of transformer
It is connected in series, secondary side simultaneously even exports, and specific connection type is as follows:
The S1 is connect with the grid of the Q1, and the S2 is connect with the grid of the Q2, the grid of the S3 and the Q3
Pole connection, the S4 connect with the grid of the Q4, the Q2 drain and the drain electrode of the Q4 connect and with the pfc circuit
Output end connection, the source electrode of the Q2 connect with the drain electrode of the Q1, and the source electrode of the Q4 is connect with the drain electrode of the Q3, institute
The source electrode of Q1 and the source electrode connect and ground of the Q3 are stated, the source electrode of the Q2 is also connect with one end of the Lr, the Lr's
The other end is connect with one end of transformer T1, and the source electrode of the Q4 is also connect with one end of the Cr, the other end of the Cr with
One end of transformer Tn connects, and the primary side of the n transformer T1 to Tn is connected in series, and the n transformer T1 is to Tn's
Secondary side is connected to circuit of synchronous rectification 105 as parallel outputs, wherein the magnetizing inductance that i-th of transformer Ti primary side includes
It is respectively labeled as Lm_i and Lk_i with leakage inductance, specifically, magnetizing inductance Lm_i is in parallel with the primary side winding of i-th of transformer Ti
The primary side winding of connection, leakage inductance Lk_i and i-th of transformer Ti are connected in series.
In a particular embodiment, driving signal is used to control the turn-on and turn-off of first field-effect tube Q1, Q2, Q3 and Q4,
Specifically, the first field-effect tube Q1 and Q4 is simultaneously turned on, and when Q1 and Q4 is connected, Q2 and Q3 shutdown；First field-effect tube Q2 and
Q3 is simultaneously turned on, when Q2 and Q3 is connected, Q1 and Q4 shutdown.The signal of driving signal input S1, S2, S3, S4 input can be with
For square-wave signal, wherein the driving signal that S1 and S4 is inputted is identical, and the driving signal that S2 and S3 is inputted is identical, S1 and S2 input
Driving signal phase phase difference 180 degree, duty ratio is all close to 50%.First field-effect tube Q1, Q2, Q3 and Q4 can be N-type
Metal-oxide semiconductor (MOS) (Negative channel-Metal-Oxide-Semicondu ctor, NMOS).Inductance Lr, it encourages
Magnetoelectricity sense Lm_i, leakage inductance Lk_i, capacitor Cr constitute LLC resonant cavity, and Lr and Lk_i constitute resonant inductance, and Cr is resonant capacitance.
There are two resonant frequency point fr and fm, fr resonance frequencies to be determined by the leakage inductance Lk_i of Cr, Lr and transformer by LLC, fm resonance frequency
Rate is determined that two of them resonant frequency point fr and fm calculate public by the magnetizing inductance Lm_1 and leakage inductance Lk_i, Lr, Cr of transformer
Formula is as follows:
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, n >=2；
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, Lm=Lm_1+Lm_2
+ ...+Lm_n, n >=2.
In a particular embodiment, when Q2 and Q3 is connected, the signal of pfc circuit output is input to the drain electrode of Q2, then again
It is transferred to inductance Lr by the source electrode of Q2, then signal is divided into two-way, is respectively transmitted to the primary side winding of Lm_1 and T1, then again
Merging is transferred to Lk_1, and signal can be transferred to the vice-side winding output of T1 when signal is transferred to the primary side winding of T1；
Signal is transferred to the primary side winding and Lm_2 that Lk_1 is transferred to T2 again later, then remerges and is transferred to Lk_2, transmits in signal
To T2 primary side winding when signal can be transferred to T2 vice-side winding output；In the case where n is greater than 2, signal transmission
The primary side winding and Lm_3 of T3 are transferred to after to Lk_2 again, then remerges and is transferred to Lk_3, be transferred to the original of T3 in signal
Signal can be transferred to the vice-side winding output of T3 when the winding of side；And so on, until signal passes through n transformer
It is transferred to Cr, signal is transferred to the drain electrode of Q3 by Cr, is then transferred to ground terminal by Q3 to constitute a circuit.As Q1 and
When Q4 is connected, the signal of pfc circuit output is input to the drain electrode of Q4, is then transferred to capacitor Cr, signal by the source electrode of Q4 again
It is transferred to Lk_n by Cr, then signal is divided into two-way, is respectively transmitted to the primary side winding of Lm_n and Tn, then remerges transmission
To Lk_ (n-1), signal can be transferred to the vice-side winding output of Tn when signal is transferred to the primary side winding of Tn；Signal
It is transferred to primary side winding and Lm_ (n-1) that Lk_ (n-1) is transferred to T (n-1) again later, then remerges and is transferred to Lk_ (n-
2), signal can be transferred to the vice-side winding output of T (n-1) when signal is transferred to the primary side winding of T (n-1)；With this
Analogize, Lr is transferred to until signal passes through n transformer, signal is transferred to the drain electrode of Q1 by Lr, is then passed by Q1
It is defeated to ground terminal to constitute a circuit.
Referring to Fig. 4, circuit of synchronous rectification 105 includes that 2n synchronous rectification drives input terminal M1_i and M2_i, 2n a the
Two field-effect tube Q1_i and Q2_i and 2n Schottky diode D1_i and D2_i, wherein the M1_i's and Q1_i
Grid connection, the M2_i are connect with the grid of the Q2_i, the source electrode of the anode and the Q1_i of the D1_i conducting direction
Connection, the cathode of the D1_i conducting direction connect with the drain electrode of the Q1_i, the D2_i conducting direction it is positive with it is described
The source electrode of Q2_i connects, and the cathode of the D2_i conducting direction is connect with the drain electrode of the Q2_i, the drain electrode and change of the Q1_i
One end Ns1_i connection on the secondary side of depressor Ti, the drain electrode of the Q2_i connect with the other end Ns3_i on the secondary side of the transformer Ti
It connects, the intermediate ends Ns2_i of the transformer Ti is connected together as the output end of rectification circuit, the 2n the second field-effects
The source electrode of pipe links together and is grounded, integer of the value range of the i between [1, n], and the n is more than or equal to 2
Integer.
In a particular embodiment, Q1_i and Q2_i can be synchronous rectification field-effect tube (Synchronous rectify
Effect Mosfet, SR MOS), the signal of M1_i and M2_i input is synchronous rectification driving signal, wherein M1_i input
Driving signal is identical, and the driving signal of M2_i input is identical, the phase difference 180 degree of the signal of M1_i and M2_i input, duty ratio
All be close to 50%, since the conducting resistance of SR MOS is smaller, than diode rectification be lost it is low, to improve heavily loaded effect
Rate.Also, D1_i and D2_i restores low pressure drop Schottky diode using fast, it is therefore an objective to which, at light load, SR MOS is not fully on
In the case where, the loss of diode in SR MOS body is reduced, to improve light-load efficiency.
In a particular embodiment, when one end Ns1_i on transformer Ti pair side is positive terminal, then the end M2_i is by high level signal
Q2_i is connected in the grid of input Q2_i, and the end M1_i is then by the grid of low level signal input Q1_i to be used to turn off Q1_i；
At this point, the signal of the transformer Ti pair side output is output to output end connection load from Ns2_i, meanwhile, the transformer Ti
The signal of secondary side output is transferred to Q2_i through the end Ns3_i from Ns2_i, is then grounded to form a circuit using Q2_i.
When the other end Ns3_p on transformer Ti pair side is positive terminal, then the grid of high level signal input Q1_i is made Q1_ by the end M1_i
I conducting, the end M2_i is then by the grid of low level signal input Q2_i to be used to turn off Q2_i；At this point, the transformer Ti pair side
The signal of output is output to output end connection load from Ns2_i, meanwhile, the signal of the transformer Ti pair side output is through Ns2_i
End is transferred to Q1_i using Ns1_i, is then grounded to form a circuit using Q1_i.Specifically, n transformer
Intermediate ends Ns2_i, which links together, merges output for the output electric current of each transformer, to expand the electric current of output, is promoted
The output power of power supply.
Referring to Fig. 5, Fig. 5 be include above-mentioned low-pressure high-power power circuit printed circuit board structural schematic diagram, should
Printed circuit board mainly includes primary side higher-pressure region and secondary side higher-pressure region, wherein primary side higher-pressure region and secondary side higher-pressure region it
Between have a safe spacing, primary side higher-pressure region for be laid out (including print and/or weld) filter circuit 101, rectification circuit 102,
Pfc circuit 103 and full-bridge resonance circuit 104, secondary side low-pressure area are mainly used for being laid out circuit of synchronous rectification then output signal,
But in the embodiment of the present application, n transformer layout in full-bridge resonance circuit 104 mainly passes through in secondary side low-pressure area
It is connected between the length and extension transformer Tn and pfc circuit of the conducting wire connected between extension transformer T1 and pfc circuit
Then conducting wire shortens transformer output end and realizes to the conductor length between printed circuit board output end；Specifically, can lead to
It crosses the length for extending the conducting wire connected between transformer T1 and Lr and extends the conducting wire connected between transformer Tn and Cr, then
Shorten transformer output end to realize to the conductor length between printed circuit board output end；Alternatively, can will be in shown in Fig. 3
Resonance transformer module is all printed and is laid out in the secondary side low-pressure area, and this printing welding manner mainly passes through extension transformation
The conducting wire connected between the length and extension transformer Cr and Q4 source electrode of the conducting wire connected between device Lr and Q2 source electrode, then contracts
Short transformer output end is realized to the conductor length between printed circuit board output end；Due to the high electricity of transformer primary side voltage
Flow small, secondary side voltage low current is big, so the path power consumption of secondary side saving is much larger than primary side connecting wire extension
Increased conducting wire power consumption, therefore the efficiency of power supply output is improved, reduce the loss of power supply.
In other words, in the embodiment of the present application, power loss is reduced to improve the mesh of the output power of power supply in order to reach
, increase the distance between input terminal Vin of the n transformer and the printed circuit board to the first pre-determined distance, reduces
The distance between output end vo ut of the n transformer and the printed circuit board is to the second pre-determined distance, so that described the
Two pre-determined distances are less than first pre-determined distance.
In other words, in the embodiment of the present application, power loss is reduced to improve the mesh of the output power of power supply in order to reach
, extend the length of the conducting wire connected between the primary side and pfc circuit of transformer T1 to the first preset length, and extend transformation
The length of the conducting wire connected between the primary side and pfc circuit of device Tn to the second preset length, meanwhile, shorten the n transformer
Output end and printed circuit board output end between the length of conducting wire that connects to third preset length so that the third is pre-
If length makes the third preset length less than the second preset length less than the first preset length.
It should be noted that the main purpose of the embodiment of the present application is to shorten transformer output end to export to printed circuit board
Connecting wire between end is to achieve the purpose that reduce power loss, therefore, extend the primary side of transformer T1 and transformer Tn with
The length of the conducting wire connected between pfc circuit is intended merely to auxiliary and realizes the purpose, as specifically extending which root conducting wire all may be used
With here also with no restrictions.
The embodiment of the present application also provides a kind of device, described device includes the printed circuit board of foregoing description.
In conclusion the embodiment of the present application provides a kind of low-pressure high-power power circuit, circuit board and device, the application
Embodiment in full-bridge resonance circuit by that, using primary side series connection, multiple transformer device structures of secondary side parallel output, can expand
The ability of electric power outputting current, and since the secondary side of multiple transformer primary sides series connection is in parallel, meeting desired signal energy transmission
In the case of, additionally it is possible to the design size of single transformer is reduced, convenient for layout, simultaneously because the heat dissipation area of multiple transformers
Greatly, it therefore reduces the temperature of power supply complete machine and improves the reliability of power supply, improve the output power of power supply.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of low-pressure high-power power circuit, which is characterized in that including sequentially connected filter circuit, full-wave rectifying circuit,
PFC pfc circuit, full-bridge resonance circuit and circuit of synchronous rectification；
The filter circuit, for filtering high-frequency interferencing signal；
The full-wave rectifying circuit, the AC signal for exporting the filter circuit are converted to the current signal in a direction
Output；
The pfc circuit, after improving the voltage of the signal exported from full-wave rectifying circuit, and the compensation raising voltage
Signal in electric current and voltage phase difference；
The full-bridge resonance circuit includes multiple transformers, wherein the signal of the pfc circuit output is input to the multiple change
The primary side of depressor, the multiple transformer is connected in series, the secondary side parallel output of the multiple transformer；
The circuit of synchronous rectification, for the synchronous signal for converting the multiple transformers connected in parallel output.
2. circuit according to claim 1, which is characterized in that the full-bridge resonance circuit includes sequentially connected full-bridge driving
Module, switch module and resonance/transformer module.
3. circuit according to claim 2, which is characterized in that
The full-bridge drive module includes four driving signal inputs S1, S2, S3 and S4；The switch module includes four the
One field-effect tube Q1, Q2, Q3 and Q4；Resonance/the transformer module includes inductance Lr, capacitor Cr and n transformer Ti, described
Each transformer in n transformer includes primary and secondary side, and the primary side includes primary side winding and primary side inductance, the primary side
Inductance includes magnetizing inductance Lm and leakage inductance Lk, and the magnetizing inductance Lm is connected in parallel with the primary side winding, the leakage inductance
Lk and the primary side winding are connected in series, integer of the value range of the i between [1, n], and the n is more than or equal to 2
Integer；
Wherein, the S1 is connect with the grid of the Q1, and the S2 is connect with the grid of the Q2, the grid of the S3 and the Q3
Pole connection, the S4 connect with the grid of the Q4, the Q2 drain and the drain electrode of the Q4 connect and with the pfc circuit
Output end connection, the source electrode of the Q2 connect with the drain electrode of the Q1, and the source electrode of the Q4 is connect with the drain electrode of the Q3, institute
The source electrode of Q1 and the source electrode connect and ground of the Q3 are stated, the source electrode of the Q2 is also connect with one end of the Lr, the Lr's
The other end is connect with one end of transformer T1, and the source electrode of the Q4 is also connect with one end of the Cr, the other end of the Cr with
One end of transformer Tn connects, and the primary side of the n transformer T1 to Tn is connected in series, the pair of the n transformer T1 to Tn
Side is connect as parallel outputs with the circuit of synchronous rectification.
4. circuit according to claim 3, which is characterized in that the S1 is identical with the driving signal that the S4 is inputted, described
S2 is identical with the driving signal that the S3 is inputted, the driving signal phase phase difference 180 degree of the S1 and S2 input.
5. circuit according to claim 4, which is characterized in that the full-bridge resonance circuit includes two resonance frequency frAnd fm,
frCalculation formula are as follows:
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, n >=2；
fmCalculation formula are as follows:
Wherein Lk=Lk_1+Lk_2+ ...+Lk_n, Lm=Lm_1+Lm_2+ ...+
Lm_n, n >=2；
The Lk_i is the leakage inductance of the transformer Ti, and the Lm_i is the magnetizing inductance of the transformer Ti.
6. according to any one of the claim 3-5 circuit, which is characterized in that the circuit of synchronous rectification include 2n synchronize it is whole
Stream driving input terminal M1_i and M2_i, 2n the second field-effect tube Q1_i and Q2_i and 2n Schottky diode D1_i with
D2_i, wherein the M1_i is connect with the grid of the Q1_i, and the M2_i is connect with the grid of the Q2_i, the D1_i
The anode of conducting direction is connect with the source electrode of the Q1_i, and the drain electrode of the cathode and the Q1_i of the D1_i conducting direction connects
It connects, the anode of the D2_i conducting direction is connect with the source electrode of the Q2_i, the cathode and the Q2_ of the D2_i conducting direction
The drain electrode of i connects, and one end Ns1_i on the secondary side of the drain electrode and transformer Ti of the Q1_i is connect, the drain electrode of the Q2_i and institute
The other end Ns3_i connection on the secondary side of transformer Ti is stated, the intermediate ends Ns2_i of the transformer Ti is connected together as rectifying
The source electrode of the output end of circuit, the 2n the second field-effect tube links together and is grounded.
7. circuit according to claim 6, which is characterized in that the synchronous rectification driving signal of M1_i input is identical, and M2_i is defeated
The synchronous rectification driving signal entered is identical, the synchronous rectification driving signal phase phase difference 180 degree of M1_i and M2_i input.
8. a kind of printed circuit board, which is characterized in that including 1 to 7 described in any item circuits.
9. printed circuit board according to claim 8, which is characterized in that including primary side higher-pressure region and secondary side low-pressure area,
The n transformer layout is in the secondary side low-pressure area.
10. a kind of device, which is characterized in that including printed circuit board described in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216557.1A CN109905032A (en) | 2019-03-20 | 2019-03-20 | A kind of low-pressure high-power power circuit, circuit board and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216557.1A CN109905032A (en) | 2019-03-20 | 2019-03-20 | A kind of low-pressure high-power power circuit, circuit board and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109905032A true CN109905032A (en) | 2019-06-18 |
Family
ID=66952756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910216557.1A Pending CN109905032A (en) | 2019-03-20 | 2019-03-20 | A kind of low-pressure high-power power circuit, circuit board and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109905032A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844359A (en) * | 2022-04-08 | 2022-08-02 | 浙江大学 | High-voltage-reduction-ratio direct-current power supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169873A (en) * | 2016-07-21 | 2016-11-30 | 连云港杰瑞电子有限公司 | It is applicable to mixing connection in series-parallel full-bridge circuit and the control method thereof of high pressure or High-current output |
| CN106602880A (en) * | 2016-10-28 | 2017-04-26 | 深圳朗兴智能云充有限公司 | Large power high efficiency thermal equilibrium LLC resonant converter and control method thereof |
| CN107231032A (en) * | 2017-06-02 | 2017-10-03 | 广东万城万充电动车运营股份有限公司 | A kind of DC charging module of concentration radiating high-power |
| CN206775393U (en) * | 2017-04-21 | 2017-12-19 | 昆明理工大学 | A kind of LLC resonant converter |
| CN109302071A (en) * | 2018-10-18 | 2019-02-01 | 南京航空航天大学 | A kind of all-wave active rectification type LLC resonant converter and its control strategy |
-
2019
- 2019-03-20 CN CN201910216557.1A patent/CN109905032A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169873A (en) * | 2016-07-21 | 2016-11-30 | 连云港杰瑞电子有限公司 | It is applicable to mixing connection in series-parallel full-bridge circuit and the control method thereof of high pressure or High-current output |
| CN106602880A (en) * | 2016-10-28 | 2017-04-26 | 深圳朗兴智能云充有限公司 | Large power high efficiency thermal equilibrium LLC resonant converter and control method thereof |
| CN206775393U (en) * | 2017-04-21 | 2017-12-19 | 昆明理工大学 | A kind of LLC resonant converter |
| CN107231032A (en) * | 2017-06-02 | 2017-10-03 | 广东万城万充电动车运营股份有限公司 | A kind of DC charging module of concentration radiating high-power |
| CN109302071A (en) * | 2018-10-18 | 2019-02-01 | 南京航空航天大学 | A kind of all-wave active rectification type LLC resonant converter and its control strategy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844359A (en) * | 2022-04-08 | 2022-08-02 | 浙江大学 | High-voltage-reduction-ratio direct-current power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110932557B (en) | High-gain quasi-resonant DC-DC converter based on voltage doubling rectifying circuit | |
| CN101534056B (en) | Output adjustable structure-changeable direct current switch power supply | |
| US20230113753A1 (en) | Dc/dc converter and method for controlling output voltage thereof | |
| CN110798073A (en) | Wide voltage range output current feed converter | |
| CN105450030B (en) | Dual transformer becomes winding isolated converter and its control method | |
| CN109874375A (en) | Power-converting device | |
| CN106026657A (en) | Non-isolated high-gain DC-DC boost converter | |
| CN109661072A (en) | LLC resonant converter, LED drive circuit and its control method | |
| WO2021031792A1 (en) | Tlc resonance circuit, and power converter applying same | |
| TW202322536A (en) | switching power supply circuit | |
| CN113541486B (en) | Interleaved diode capacitor network high-gain ZVT (zero voltage zero volt) direct current converter and auxiliary circuit | |
| CN111342664A (en) | Integrated DC-DC converter and control method thereof | |
| CN109818494A (en) | A kind of quasi- source Y DC-DC converter of high gain voltage type | |
| WO2024027360A1 (en) | Non-isolated full-bridge cascade converter circuit and control method therefor | |
| CN109905032A (en) | A kind of low-pressure high-power power circuit, circuit board and device | |
| WO2018157797A1 (en) | Full-bridge resonant converter | |
| CN115473429B (en) | Phase-shifting full-bridge conversion circuit applied to high power and high step-up ratio | |
| Li et al. | An efficiency-oriented two-stage structure employing partial power regulation | |
| CN106787756A (en) | A kind of CL FT CL resonance DC converters | |
| CN216981796U (en) | Improved high-power high-reliability DC-DC isolation booster circuit | |
| CN110012574A (en) | A kind of mixing control LED drive circuit of the single-stage without bridge Sepic and LLC | |
| CN102098842A (en) | Current transformer-based light-emitting diode (LED) driving circuit | |
| Nourieh et al. | A novel resonant ZVS power converter with self‐driven synchronous rectifier for low‐voltage high‐current applications | |
| Yao et al. | Zero Input current ripple DC-DC converter with high step-up and soft-switching characteristics | |
| CN209250496U (en) | Bidirectional, dc conversion circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
|
| RJ01 | Rejection of invention patent application after publication |