CN108134522A - A kind of isolated converter of multiple-channel output - Google Patents
A kind of isolated converter of multiple-channel output Download PDFInfo
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- CN108134522A CN108134522A CN201810004781.XA CN201810004781A CN108134522A CN 108134522 A CN108134522 A CN 108134522A CN 201810004781 A CN201810004781 A CN 201810004781A CN 108134522 A CN108134522 A CN 108134522A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
Abstract
The present invention provides a kind of multiple-channel output isolated converter, output voltage way can be expanded to more than 10 tunnels, cost control is in relatively low range, it can guarantee a kind of converter of cross regulation rate again simultaneously, including input circuit, main power circuit, absorbing circuit, control circuit, its main power circuit includes a metal-oxide-semiconductor and at least two transformer, each transformer includes a primary side winding and at least two vice-side winding, a main road output circuit and multiple bypass output circuits are formd, multiple-way supply can be given simultaneously.It extraordinary can be mutually coupled per bypass all the way with main road, therefore the leakage inductance between each road is very small, cross regulation rate can be fine, therefore the invention can be extended to high power level use again.
Description
Technical field
The present invention relates to switch converters field, especially for the multiple output converter field of isolation.
Background technology
With the continuous development of power electronics, scientific and technological progress is more and more to the use of electric energy, so as to the need to power supply
Ask also increasing, the requirement of security performance is also higher and higher, particularly isolation features, the sum that electricity consumption end can be allowed safer
Dangerous end keeps apart, and realizes that the Important Components of buffer action are transformers, while transformer also takes on energy transmission
Critical function, therefore transformer plays very important effect in switching power converters design, is often needed in a system
Different ports to be given to power, the diversity of port results in the demand to converter difference output voltage, traditional solution
There are two types of general：One kind is that directly bypass and main road are connected in parallel, as shown in Figure 1, there are two shortcomings for the program：First, work as
Output way can not find suitable transformer framework when more can be with coiling, it is assumed that the output of 5 tunnels is needed just to need 20 and is drawn
The transformer framework of foot, 10 tunnels export the transformer framework for then needing 40 pins, and conventional transformer lead pin quantity is general
All within 16 feet, so needing specific customization, design cost is greatly increased；Second is that the way when bypass then can more than two
Cause bypass winding and main road winding coupled it is bad cause leakage inductance big, cause serious cross regulation rate problem, easily draw
Play the operation irregularity of output terminal load；Another scheme is direct converter parallel connection to realize multiple-channel output, as shown in Fig. 2,
The shortcomings that program is that the design cost of whole system can greatly increase, while volume also increases, competing so as to seriously affect market
Strive power.
Invention content
It can be expanded to more than 10 tunnels to solve the above problems, the present invention provides a kind of output voltage ways, cost control
System can guarantee a kind of converter of cross regulation rate again in relatively low range, and the program includes：
A kind of multiple-channel output isolated converter, including input circuit, main power circuit, absorbing circuit, control circuit, output
Current rectifying and wave filtering circuit, main power circuit are formed by connecting by transformer and switching tube MOS1, and output rectifier and filter is whole by exporting
Stream diode and output capacitance are formed by connecting；
The main power circuit includes a metal-oxide-semiconductor and at least two transformer, the grid connection control circuit of metal-oxide-semiconductor
The control signal of output, the output terminal of the drain electrode connection absorbing circuit of metal-oxide-semiconductor, the detection of the source electrode connection control circuit of metal-oxide-semiconductor
Port；
The transformer includes a primary side winding, the primary side winding different name end of first transformer, second transformer
Primary side winding different name end, and so on be connected to the primary side winding different name end of n-th transformer and be connected to power input
Just, the primary side winding Same Name of Ends of first transformer, second transformer primary side winding Same Name of Ends, and so on to n-th
The primary side winding Same Name of Ends of transformer is connected and is connected to the drain electrode of metal-oxide-semiconductor, and N is the integer more than or equal to 2；
The transformer includes at least two vice-side winding, and the first vice-side winding of first transformer is defeated by the first via
Go out to arrange to export as main road after filter circuit and give rear class power supply, remaining vice-side winding of first transformer passes through correspondence respectively
Output rectifier and filter after as bypass export give rear class power supply；
The Same Name of Ends of first vice-side winding of second transformer and so on to n-th transformer the first vice-side winding
Same Name of Ends pass sequentially through the anode of corresponding diode respectively and cathode is being connected to the output of main road output just, second transformation
The different name end of first vice-side winding of device and so on be connected to main road to the different name end of the first vice-side winding of n-th transformer
The output of output is born；Remaining vice-side winding of second transformer to n-th transformer is filtered respectively by corresponding output rectification
It exports as bypass after wave circuit and powers to rear class.
Preferably, the input circuit is made of input capacitance, and one end connection power input of input capacitance is just；Input
The other end connection reference ground of capacitance.
Preferably, the absorbing circuit includes diode DA, resistance R1 and capacitance C2, one end and the capacitance C2 of resistance R1
One end be connected and be connected to power input just, the other end of resistance R1 is connected with the other end of capacitance C2 and is connected to two poles
The cathode of pipe DA, the drain electrode of the anode connection metal-oxide-semiconductor of diode DA.
Preferably, control circuit packet control IC, current sampling resistor and voltage sample isolation feedback module, voltage
The output voltage of sampling isolation feedback module sampling isolated converter module and the feedback pin for feeding back to control IC, control IC's
Reference ground pin connection input reference ground, controls the current detecting pin of IC to be connected to input reference by current sampling resistor
Ground controls the grid of the driving pin connection metal-oxide-semiconductor of IC, drives turning on and off for metal-oxide-semiconductor.
Preferably, the output rectifier and filter is made of output rectifier diode and output capacitance, output
The anode of rectifier diode connects the Same Name of Ends of corresponding vice-side winding, exports the cathode connection output capacitance of rectifier diode
One end, and as output cathode, the other end of output capacitance connects the different name end of corresponding vice-side winding and as output ground.
The pin of control chip U1 is defined as follows：Including at least CS pins (current detecting pin, for detecting primary side peak value
Size of current), FB pins (feedback pin, receive secondary side feedback signal be input to chip carry out duty cycle adjustment), GATE pins
(driving pin, chip output drive signal to the port of external metal-oxide-semiconductor), GND pin (the reference ground pin of chip).
The operation principle of the present invention：As shown in figure 3, in a converter, multiple transformers connected in parallel, input circuit are used
Metal-oxide-semiconductor shared, in main power circuit shares, and absorbing circuit shares, and the main power winding of primary side of each transformer in parallel is
It is together in parallel, 3 road vice-side windings of each transformer belt, wherein being main road all the way, remaining two-way is bypass, each transformer
Output terminal main road all connected together after diode rectification, output capacitance shares, and bypass then individually connects one after rectification
Output capacitance exports all the way, and transformer number in parallel depends on the way that output circuit needs, and control circuit only uses one,
Control program is as common PWM control programs.
Compared with prior art, the present invention has the advantages that：
(1) the output voltage way of output terminal can be extended to more than 10 tunnels；
(2) many components can share, and greatly reduce the converter cost of super multiple-channel output scheme；
(3) it ensure that the cross regulation rate of each output bypass voltage under conditions of super multiple-channel output is met；
(4) control is simple, and the phenomenon that multiple controls interfere with each other will not occur；
(5) parallel connection of transformer winding has effectively disperseed the heat of transformer, and reliability effectively improves.
Description of the drawings
Fig. 1 is bypass and the direct parallel arrangement schematic diagram of main road in traditional multiple-channel output scheme；
Fig. 2 is converter parallel arrangement block diagram in traditional multiple-channel output scheme；
Fig. 3 multiple-channel output functional block diagrams of the present invention；
Fig. 4 present invention 5 tunnels output specific embodiment；
Fig. 5 present invention 7 tunnels output specific embodiment.
Specific embodiment
Embodiment one
With 2 transformers, illustrated for each 3 auxiliary windings of transformer.Fig. 4 is set using the thought of the present invention
The schematic diagram of the 5 tunnels output flyback converter of meter, the connection relation of circuit diagram of the present invention are：Input anode VIN+ connections
The cathode connection reference ground GND ends of input filter capacitor Cin, Cin, input terminal VIN+ be also connected with resistance R1 in absorbing circuit and
One end of C2, the other end of R1 are connected with the other end of C2, and are connected to the cathode of diode DA, and the anode of DA is connected to MOS
The drain electrode of pipe MOS1, input terminal VIN+ are also connected to the different name end of transformer T1 and T2 primary side simultaneously, and transformer T1's and T2 is same
Name end connects together the drain electrode for being commonly connected to metal-oxide-semiconductor MOS1, and the grid connection of MOS1 controls the GATE pins of IC U1,
One end of the source electrode connection current sampling resistor RCS of MOS1, while connect the CS pins of control IC U1, current sampling resistor RCS
Other end connection reference ground GND, control IC U1 GND pin connection reference ground GND, FB foot connection voltage sample isolation
One end of feedback module, the other end connection output terminal VO1 of voltage sample isolation feedback module, the vice-side winding of transformer T1
T1s1 is main road output, and the anode of the Same Name of Ends connection rectifier diode D1 of vice-side winding T1s1, the cathode of D1, which connects, exports electricity
Hold the anode of Co1, this port is as the different name end connection output capacitance Co1's of the first via main road output port Vo1, winding T1s1
Cathode, the reference ground as main road output are connected to GND1；The sun of the Same Name of Ends connection rectifier diode D2 of vice-side winding T1s2
Pole, the anode of the cathode connection output capacitance Co2 of D2, this port is as the second road bypass output Vo2, the different name end of winding T1s2
The cathode of output capacitance Co2 is connected, the reference ground as bypass output is connected to GND2；The Same Name of Ends connection of vice-side winding T1s3
The anode of rectifier diode D3, the anode of the cathode connection output capacitance Co3 of D3, this port export Vo3 as third road bypass,
The cathode of the different name end connection output capacitance Co3 of winding T1s3, the reference ground as bypass output are connected to GND3；Transformer T2
Vice-side winding T2s1 be main road output, the anode of the Same Name of Ends connection rectifier diode D1B of winding T2s1, the cathode of D1B connects
The anode of output capacitance Co1 is connect, this port connects output as the different name end of the first via main road output port Vo1, winding T2s1
The cathode of capacitance Co1, the reference ground as main road output are connected to GND1；Two pole of Same Name of Ends connection rectification of vice-side winding T2s2
The anode of pipe D4, the anode of the cathode connection output capacitance Co4 of D4, this port is as the 4th road bypass output Vo4, winding T2s2
Different name end connection output capacitance Co4 cathode, the reference ground as bypass output is connected to GND4；Vice-side winding T2s3's is same
The anode of name end connection rectifier diode D5, the anode of the cathode connection output capacitance Co5 of D5, this port is as the 5th road bypass
Vo5, the cathode of the different name end connection output capacitance Co5 of winding T2s3 are exported, the reference ground as bypass output is connected to GND5.
Its operation principle is：Isolation more afterwards is sampled to output voltage by voltage sample isolation module and transmits one
FB foot voltages, the detection of FB pins the feedback voltage V FB, feedback voltage V FB of control chip U1 are the loads as load changes
Bigger, different VFB foot voltages correspond to different peak point currents, after CS pins, which sample peak point current, reaches the size of needs
It turning off metal-oxide-semiconductor and realizes PWM controls, this control method is conventional control methods, is repeated no more, when MOS1 is opened, input
Voltage VIN+ is added in simultaneously above the primary side winding of transformer T1, T2, T3, and the primary side inductance of two transformers is excitatory, two changes
Depressor vice-side winding all ends, and after MOS1 is turned off, the winding of secondary enters erasing state, and bypass is closed by the turn ratio with main road
System exports corresponding voltage, powering load, since transformer primary side generally requires multiple windings and around reducing current density,
Reducing fever, therefore compare and account for volume, the transformer for needing selection window area very big, actually magnetic core do not need to be very big, because
This can usually cause more iron loss, the solution of the present invention because of multiple transformers connected in parallel, therefore the primary side of single transformation around
Group can reduce, therefore can reduce volume of transformer, improving transformer makes with the smaller magnetic core framework of selection window area
With efficiency, at the same time, because being separated into multiple transformers, therefore the heat that transformer loss generates is disperseed, therefore generate heat
Amount reduce, improve reliability, furthermore, because being divided into multiple transformers, per all the way bypass can it is extraordinary with
Main road is mutually coupled, therefore the leakage inductance between each road is very small, and cross regulation rate can be fine, therefore the invention can be extended to again
High power level uses.
Embodiment two
With 3 transformers, each 3 auxiliary windings of transformer illustrate.Fig. 5 is designed using the thought of the present invention
7 tunnels export the schematic diagram of flyback converter, and the connection relation of circuit diagram of the present invention is：Input anode VIN+ connections input
The cathode connection reference ground GND ends of filter capacitor Cin, Cin, input terminal VIN+ are also connected with the resistance R1's and C2 in absorbing circuit
One end, the other end of R1 are connected with the other end of C2, and are connected to the cathode of diode DA, and the anode of DA is connected to the leakage of MOS1
Pole, input terminal VIN+ are also connected to the different name end of transformer T1, T2, T3 primary side simultaneously, and the Same Name of Ends of transformer T1, T2, T3 connect
It is connected to the drain electrode for being cooperatively connected to MOS1, the GATE pins of the grid connection control IC U1 of MOS1, the source electrode connection of MOS1
One end of current sampling resistor RCS, while connect the CS pins of control IC U1, the other end connection of current sampling resistor RCS
One end of GND pin connection reference ground GND, FB the foot connection voltage sample isolation feedback module of reference ground GND, control IC U1,
The vice-side winding T1s1 of other end connection the output terminal VO1, transformer T1 of voltage sample isolation feedback module are main road output,
The anode of the Same Name of Ends connection rectifier diode D1 of winding T1s1, the anode of the cathode connection output capacitance Co1 of D1, this port is made
For main road output port Vo1, the cathode of the different name end connection output capacitance Co1 of winding T1s1, the reference ground as main road output
It is connected to GND1；The anode of the Same Name of Ends connection rectifier diode D2 of vice-side winding T1s2, the cathode connection output capacitance Co2 of D2
Anode, this port exports Vo2 as bypass, and the cathode of the different name end connection output capacitance Co2 of winding T1s2 is defeated as bypass
The reference ground gone out is connected to GND2；The anode of the Same Name of Ends connection rectifier diode D3 of vice-side winding T1s3, the cathode connection of D3
The anode of output capacitance Co3, this port export Vo3 as bypass, and the different name end connection output capacitance Co3's of winding T1s3 is negative
Pole, the reference ground as bypass output are connected to GND3；
The vice-side winding T2s1 of transformer T2 is main road output, the Same Name of Ends connection rectifier diode D1B's of winding T2s1
Anode, the anode of the cathode connection output capacitance Co1 of D1B, this port is as main road output port Vo1, the different name of winding T2s1
The cathode of end connection output capacitance Co1, the reference ground as main road output are connected to GND1；The Same Name of Ends of vice-side winding T2s2 connects
The anode of rectifier diode D4 is connect, the anode of the cathode connection output capacitance Co4 of D4, this port exports Vo4, winding as bypass
The cathode of the different name end connection output capacitance Co4 of T2s2, the reference ground as bypass output are connected to GND4；Vice-side winding T2s3
Same Name of Ends connection rectifier diode D5 anode, the anode of the cathode connection output capacitance Co5 of D5, this port is defeated as bypass
Go out Vo5, the cathode of the different name end connection output capacitance Co5 of winding T2s3, the reference ground as bypass output is connected to GND5.
The vice-side winding T3s1 of transformer T3 is main road output, the Same Name of Ends connection rectifier diode D1C's of winding T3s1
Anode, the anode of the cathode connection output capacitance Co1 of D1C, this port is as main road output port Vo1, the different name of winding T3s1
The cathode of end connection output capacitance Co1, the reference ground as main road output are connected to GND1；The Same Name of Ends of vice-side winding T3s2 connects
The anode of rectifier diode D6 is connect, the anode of the cathode connection output capacitance Co6 of D6, this port exports Vo6, winding as bypass
The cathode of the different name end connection output capacitance Co6 of T3s2, the reference ground as bypass output are connected to GND6；Vice-side winding T3s3
Same Name of Ends connection rectifier diode D7 anode, the anode of the cathode connection output capacitance Co7 of D7, this port is defeated as bypass
Go out Vo7, the cathode of the different name end connection output capacitance Co7 of winding T3s3, the reference ground as bypass output is connected to GND7.
Its operation principle is consistent with specific embodiment one, therefore repeats no more.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, for those skilled in the art, without departing from the spirit and scope of the present invention, also
Several improvements and modifications can be made, circuit is improved and is retouched also should be regarded as protection scope of the present invention, here no longer
It is repeated with embodiment, protection scope of the present invention should be subject to claim limited range.
Claims (5)
1. a kind of multiple-channel output isolated converter, whole including input circuit, main power circuit, absorbing circuit, control circuit, output
Filter circuit is flowed, main power circuit is formed by connecting by transformer and switching tube MOS1, and output rectifier and filter is by output rectification
Diode and output capacitance are formed by connecting；
It is characterized in that：The main power circuit includes a metal-oxide-semiconductor and at least two transformer, the grid connection control of metal-oxide-semiconductor
The control signal of circuit output processed, the output terminal of the drain electrode connection absorbing circuit of metal-oxide-semiconductor, the source electrode connection control circuit of metal-oxide-semiconductor
Detection port；
The transformer includes a primary side winding, the primary side winding different name end of first transformer, second transformer original
Side winding different name end, and so on be connected to the primary side winding different name end of n-th transformer and be connected to power input just,
The primary side winding Same Name of Ends of one transformer, second transformer primary side winding Same Name of Ends, and so on to n-th transformer
Primary side winding Same Name of Ends be connected and be connected to the drain electrode of metal-oxide-semiconductor, N is the integer more than or equal to 2；
The transformer includes at least two vice-side winding, and the first vice-side winding of first transformer is exported whole by the first via
It exports as main road after reason filter circuit and powers to rear class, remaining vice-side winding of first transformer is respectively by corresponding defeated
Go out to export as bypass after current rectifying and wave filtering circuit and give rear class power supply；
The Same Name of Ends of first vice-side winding of second transformer and so on to n-th transformer the first vice-side winding it is same
Name end passes sequentially through the anode of corresponding diode respectively and cathode is being connected to the output of main road output just, second transformer
The different name end of first vice-side winding and so on to n-th transformer the first vice-side winding different name end be connected to main road output
Output bear；Remaining vice-side winding of second transformer to n-th transformer passes through corresponding output rectification filter electricity respectively
It exports as bypass behind road and powers to rear class.
2. the multiple-channel output isolated converter according to right wants 1, it is characterised in that：The input circuit is by input capacitance
Composition, one end connection power input of input capacitance is just；The other end connection reference ground of input capacitance.
3. the multiple-channel output isolated converter according to right wants 1, it is characterised in that：The absorbing circuit includes diode
DA, resistance R1 and capacitance C2, one end of resistance R1 are connected with one end of capacitance C2 and are connected to power input just, resistance R1's
The other end is connected with the other end of capacitance C2 and is connected to the cathode of diode DA, and the anode of diode DA connects the leakage of metal-oxide-semiconductor
Pole.
4. the multiple-channel output isolated converter according to right wants 1, it is characterised in that：Described control circuit packet control IC,
Current sampling resistor and voltage sample isolation feedback module, voltage sample isolation feedback module sample the defeated of isolated converter module
Go out voltage and feed back to the feedback pin of control IC, the reference ground pin of IC is controlled to connect input reference ground, controls the electric current of IC
Detection pin is connected to input reference ground by current sampling resistor, controls the grid of the driving pin connection metal-oxide-semiconductor of IC, driving
Metal-oxide-semiconductor turns on and off.
5. the multiple-channel output isolated converter according to right wants 1, it is characterised in that：The output rectifier and filter is
It is made of output rectifier diode and output capacitance, the anode for exporting rectifier diode connects the of the same name of corresponding vice-side winding
End exports one end of the cathode connection output capacitance of rectifier diode, and as output cathode, and the other end of output capacitance connects
The different name end of corresponding vice-side winding is simultaneously used as output ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004781.XA CN108134522A (en) | 2018-01-03 | 2018-01-03 | A kind of isolated converter of multiple-channel output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004781.XA CN108134522A (en) | 2018-01-03 | 2018-01-03 | A kind of isolated converter of multiple-channel output |
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| Publication Number | Publication Date |
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| CN108134522A true CN108134522A (en) | 2018-06-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810004781.XA Pending CN108134522A (en) | 2018-01-03 | 2018-01-03 | A kind of isolated converter of multiple-channel output |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112165256A (en) * | 2020-10-30 | 2021-01-01 | 杭州海兴电力科技股份有限公司 | DC-to-DC isolating switch power supply system for three-phase multifunctional electric energy meter |
| CN114312343A (en) * | 2021-01-14 | 2022-04-12 | 华为数字能源技术有限公司 | Motor control system and automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112165256A (en) * | 2020-10-30 | 2021-01-01 | 杭州海兴电力科技股份有限公司 | DC-to-DC isolating switch power supply system for three-phase multifunctional electric energy meter |
| CN114312343A (en) * | 2021-01-14 | 2022-04-12 | 华为数字能源技术有限公司 | Motor control system and automobile |
| US11813942B2 (en) | 2021-01-14 | 2023-11-14 | Huawei Digital Power Technologies Co., Ltd. | Motor control system and vehicle |
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