CN207283410U - A kind of power conversion module and the power-supply system being made of the power conversion module connection in series-parallel - Google Patents
A kind of power conversion module and the power-supply system being made of the power conversion module connection in series-parallel Download PDFInfo
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- CN207283410U CN207283410U CN201720986966.6U CN201720986966U CN207283410U CN 207283410 U CN207283410 U CN 207283410U CN 201720986966 U CN201720986966 U CN 201720986966U CN 207283410 U CN207283410 U CN 207283410U
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Abstract
The power-supply system formed the utility model discloses a kind of power conversion module and by the power conversion module connection in series-parallel, there are two loops in power conversion, one is for controlling the output regulation loop of output voltage stabilization；The input grading ring of another input voltage size of module in order to control, for the power-supply system of N number of module input series and output parallel, it can realize that each module input voltage is pressed by the loop, pressed so as to fulfill the input in input series connection and this power-supply system of output-parallel, output stream requires, and it can guarantee that it with high output voltage precision, realize the direct connection in series-parallel of multiple modules, make power-supply system more flexible, compared to two-step scheme, more efficient, output is more stable, and from the influence of topology.
Description
Technical field
The utility model patent is related to a kind of power conversion module and power-supply system, more particularly to for high input voltage, mould
The occasion of blockization application.
Background technology
In the application system of Switching Power Supply, high input voltage occasion, such as photo-voltaic power supply, its general input range is wide and inputs
Voltage is high, and high pressure can reach 1500V even more highs, it is therefore desirable to improve the rated voltage of rear stage converter switches pipe.It is and high
Press the on state resistance of MOSFET big, cause conduction loss big, and cost is high；Someone, which says, can use IGBT as switching tube,
But though IGBT saturation voltage drops are small, there are current tail phenomenon, limits the raising of switching frequency, be unfavorable for reduce transformer and
The volume of filtering device (inductance, capacitance), along with cost factor, hence it is evident that the selection for not being.
In order to solve the problems, such as the high input voltage of photovoltaic Switching Power Supply, some Switching Power Supply producers are just come up with switch electricity
The connection in series-parallel of power device is carried out inside source, required high pressure applications are substituted with multiple low voltage power devices, still
Such standard switch power module limits the selection of user, and general producer all can to reduce the quantity of product type
The input of super wide range is done, causes the cost of product to improve, but is for the customer Redundancy Design.Also someone contemplates
The mentality of designing of combined converter, but be typically all to be realized using complicated external control circuit, system complex and application
Underaction.Therefore, the power supply of client needs can be directly formed with reference power supply module for power module producer
System is the problem of being worthy of consideration.If it is then the power supply kind that power supply production company is produced can be greatly reduced, it is convenient
The electric power system of its needs of user's designed, designed.
Power-supply system is built with reference power supply module, most basic method is exactly the connection in series-parallel group using input/output
Close.By two identical power modules as an example, by using the series-parallel connection method of input/output, following four are shared
Kind power-supply system can combine to obtain：
System 1：Input is in parallel, the system of output-parallel；
System 2：Input series connection, the system of output-parallel；
System 3：Input is in parallel, the system for exporting series connection；
System 4：Input series connection, the system for exporting series connection.
In these four systems, what is be widely used is the first system.Typical product has high-power communication power supply
System, high power UPS system etc., other three kinds of systems, using being not much.
Each module in system 2, from redundancy requirement, preferably mutually independently, i.e., it is each have by oneself the control of oneself with
Power supply.But modules by single reference power supply, cannot make the accurate voltage stabilizing of output voltage, because at that rate, respectively
Electric current of the module after output terminal parallel connection, can be due to the factory-set value error of module voltage, and causes very big inequality, this
Very big inequality of each module on its input voltage is also led to, so that the reliability of module is influenced, or even damage.So one
As cannot to accurate voltage stabilizing power module carry out directly input series connection, output-parallel.
In existing common topology, normal shock, flyback have just vetoed input series and output parallel system from principle
Feasibility.Input impedance in common topology in the small-signal model of Royer circuits is just, to be more adapted to series-parallel system
In, but Royer circuits are used in high-pressure system, the selection of switching tube is more difficult, the connection in series-parallel system being not appropriate under high pressure
In system.
Switching Power Supply changes feed unit as the energy of other electronic equipments, its volume also receives much concern with flexibility,
Such as high-power ultrathin products, the volume of its high tension apparatus and the serious height that have impact on integral product of the volume of transformer
Degree.Here there are two kinds of settling modes, a kind of is the connection in series-parallel form using transformer, by power dispersion in several transformers,
The volume of transformer is reduced, so as to achieve the purpose that to reduce whole Switching Power Supply volume；Another thinking be exactly the string of module simultaneously
Connection, power expansion is carried out by the connection in series-parallel of several small-power modules.But carry out the input of two modules on the market at present
The structure of series connection output-parallel, is required for extra addition flow equalizing circuit outside module, and the exterior control so applied is complicated, right
There is certain specialty limitation for client, the normal client of some non-electronics majors can not be realized simply.Or pass through one
A little topologys with positive impedance characteristic, primary side series connection secondary parallel connection is carried out using its peculiar presses naturally.
In the series parallel structure referred in the utility model patent of Application No. 201621402396.3, using opening
The asymmetrical half-bridge flyback converter switch power module of ring control carries out connection in series-parallel.
Although above-mentioned patent can realize the simple parallel connection of two switch power modules, due to originals such as load regulations
Cause, the output voltage range of whole system are also bigger than the voltage range of input, it is therefore desirable to second level voltage-stabilizing system is added, this
The whole efficiency of system is influenced very big.The circuit structure of the utility model patent as shown in Figure 1, Figure 2, Figure 3, Figure 4, wherein scheming
1 directly inputs the structure diagram of series connection output-parallel for two modules, and Fig. 2 directly inputs series connection output-parallel for two modules
And the structure diagram of Voltage stabilizing module is added, Fig. 3 directly inputs series connection output-parallel structure diagram for multiple modules, and Fig. 4 is
Multiple modules directly input series connection output-parallel and add the structure diagram of Voltage stabilizing module.
First embodiment uses two 60W, input voltage in the utility model patent of Application No. 201621402396.3
Scope be 120VDC~240VDC calibration power modular converter as connection in series-parallel composition one 120W power-supply system, to its
Input series and output parallel effect under opened loop control has carried out experimental verification.After the deviation for considering opened loop control parameter, module
Input voltage Accuracy extimate can decline, at this time can by two extreme deviations of control parameter again with power stage parameter two
Kind extreme deviations, by the size of module gain, are combined into a kind of two new extreme modules.Theoretically, gain it is maximum and
The two modules As and B of gain minimum correspond to following parameters respectively：
The module of gain maximum：Lm(min), Lr(min), Cr(min), Dmac, fs(min)；
The module of gain minimum：Lm(max), Lr(max), Cr(max), Dmin, fs(max)。
By five above-mentioned parameter combinations into following five groups of experiment parameters：
Combination 1：Power stage and control are input series connection/output-parallel experiment of nominal parameters
A module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.5, fs=100KHz
B module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.5, fs=100KHz
Combination 2：Power stage and duty cycle are nominal parameters, but switching frequency is respectively the input series connection/defeated of upper lower deviation
Go out experiment in parallel
A module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.5, fs=90KHz
B module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.5, fs=110KHz
Combination 3：Power stage and switching frequency are nominal parameters, but duty cycle is respectively the input series connection/defeated of upper lower deviation
Go out experiment in parallel
A module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.55, fs=100KHz
B module parameters：Lm=145 μ H, Lr=7 μ H, Cr=0.27 μ F, D=0.45, fs=100KHz
Combination 4：Switching frequency and duty cycle are nominal parameters, but power stage parameter is respectively the input string of upper lower deviation
Connection/output-parallel experiment
A module parameters：Lm=130.5 μ H, Lr=6.3 μ H, Cr=0.22 μ F, D=0.5, fs=100KHz
B module parameters：Lm=159.5 μ H, Lr=7.7 μ H, Cr=0.22 μ F, D=0.5, fs=100KHz
Combination 5：Duty cycle is nominal parameters, but power stage parameter and switching frequency are respectively the input string of upper lower deviation
Connection/output-parallel experiment
A module parameters：Lm=130.5 μ H, Lr=6.3 μ H, Cr=0.22 μ F, D=0.55, fs=90KHz
B module parameters：Lm=159.5 μ H, Lr=7.7 μ H, Cr=0.22 μ F, D=0.45, fs=110KHz
The input voltage equalizing of system flows the experimental data of effect with output as shown in table 1 and table 2, and combination 1 is two
The good data of uniformity of module, can be seen that to input on the basis of it ensure that uniformity from the data and press precision all
Within 1%, flow precision also all within ± 1%, even take into account the inconsistency of two modules, its press with
Precision is flowed also all in ± 10% precision.Table 3 is different input voltage and exports under full load conditions, various parameters combination
Output voltage values.
Under the different input voltages of table 1, the maximum input voltage of various parameters combination presses precision
| Press precision | Combination 1 | Combination 2 | Combination 3 | Combination 4 | Combination 5 |
| Vg=300V | ± 0.67% | ± 1.23% | ± 8.7% | ± 6.8% | ± 5.6% |
| Vg=400V | ± 0.38% | ± 1.20% | ± 8.2% | ± 6.8% | ± 5.5% |
| Vg=530V | ± 0.15% | ± 1.21% | ± 8.0% | ± 6.9% | ± 5.6% |
Under the different input voltages of table 2, the fully loaded output current of various parameters combination flows precision
| Flow precision | Combination 1 | Combination 2 | Combination 3 | Combination 4 | Combination 5 |
| Vg=300V | ± 0.10% | ± 0.92% | ± 8.5% | ± 6.6% | ± 6.1% |
| Vg=400V | ± 0.12% | ± 1.30% | ± 7.9% | ± 7.0% | ± 7.4% |
| Vg=530V | ± 0.25% | ± 1.63% | ± 7.6% | ± 7.3% | ± 6.9% |
Under the different input voltages of table 3 and output full load conditions, the output voltage (V) of various parameters combination
As can be seen that can meet two modules after two module input series and output parallel from three above form
Input pressure flows precision with output, but output voltage range is but more than the busbar voltage of input voltage range, at present ACDC
Scope is 5:1 or so, then the design difficulty of the Voltage stabilizing module of rear class is very big.
Utility model content
Therefore, the technical problems to be solved in the utility model is：A kind of power conversion module is provided, realize input series connection and
Input in this power-supply system of output-parallel is pressed, and output stream requires, and can guarantee that it with high output voltage precision, real
The direct connection in series-parallel of existing multiple modules, makes power-supply system more flexible, more efficient compared to two-step scheme, and output is more stable, and
And from the influence of topology.Modularization idea is introduced, input stage uses multiple block coupled in series modes, the voltage of so each module
Stress will substantially reduce.
In order to achieve the above object, the utility model is achieved through the following technical solutions：
A kind of power conversion module, it is characterised in that：
Including 7 element circuits：Main power circuit, control drive circuit, former secondary isolation circuit, loop isolation circuit,
Input isolation sample circuit, input grading ring, output regulation loop；Including 9 external terminals：Positive input voltage terminal, negative input electricity
Pressure side, positive output voltage terminal, negative output voltage terminal, signal input terminal just, signal input terminal bear, signal output part
Son just, signal output terminal bear, output voltage sampling terminal；
Its connection relation is：The input terminal connection positive input voltage terminal of main power circuit and negative input voltage terminal, master
The output terminal connection positive output voltage terminal and negative output voltage terminal of power circuit；The input terminal of input isolation sample circuit connects
Connect positive input voltage terminal and negative input voltage terminal, the negative output terminal of input isolation sample circuit connect negative output voltage at the same time
Terminal and signal output terminal are born, input isolation sample circuit positive output end be connected at the same time signal output terminal just with input
One input terminal of grading ring, another input terminal for inputting grading ring are being connected to signal input terminal just, are exporting grading ring
3rd input terminal is connected to signal input terminal and bears, input grading ring output terminal be connected to one of loop isolation circuit it is defeated
Enter end；Output voltage sampling terminal is connected to output regulation loop, and the output terminal for exporting regulation loop is connected to loop isolation circuit
Another input terminal；The output terminal of loop isolation circuit is connected to after passing sequentially through former secondary isolation circuit, control drive circuit
Main power circuit；
The function of each terminal is：Positive input voltage terminal and negative input voltage terminal, for input voltage；Positive output voltage
Terminal and negative output voltage terminal, for output voltage；Signal input terminal is just born with signal input terminal, is pressed for inputting
Ring receives external signal；Signal output terminal is just born with signal output terminal, for isolating sample circuit output sampled signal；It is defeated
Go out voltage sample terminal, for inputting the voltage for needing to sample；
Each unit circuit function is：
Main power circuit, carries out isolated variable to input voltage, obtains output voltage；
Drive circuit is controlled, switch controlling signal is provided for the power switch of main power circuit；
Former secondary isolation circuit, isolation transmission is carried out to switch controlling signal；
Regulation loop is exported, controls output voltage stabilization；
Input isolation sample circuit, gathers input voltage, and export sampled signal to signal output terminal just；
Grading ring is inputted, compares the size of sampled signal and external signal, the size of control input voltage；
Loop isolation circuit, isolation output regulation loop and input grading ring.
Preferably, negative output voltage terminal, signal input terminal are born and the minus 3 outer end submultiplexs of signal output terminal, i.e.,
This three terminals are same terminal.
Preferably, main power circuit uses asymmetrical half-bridge flyback topologies.
Preferably, stagger between the drive pulse signal of two switching tubes in asymmetrical half-bridge flyback topologies one prevent altogether
Lead to the dead time of short circuit.
Preferably, the dead time is 300nS.
Application as above-mentioned technical proposal：Output voltage sampling terminal can be connected with negative output voltage terminal, shielded
Cover the function of output regulation loop.
Application as above-mentioned technical proposal：Terminal can be input a signal into just to be connected with negative output voltage terminal, shielded
Input the function of grading ring.
The utility model also provides a kind of power-supply system, including N number of power conversion module using above-mentioned technical proposal, N
For the natural number more than 1, its connection relation is：The positive input voltage terminal of first power conversion module be power-supply system just
Input terminal, the negative input voltage terminal of the first power conversion module and the positive input voltage terminal phase of the second power conversion module
Even, the negative input voltage terminal of the second power conversion module is connected with the positive input voltage terminal of the 3rd power conversion module, according to
It is secondary to analogize, the negative input voltage terminal of N-1 power conversion modules and the positive input voltage terminal phase of N power conversion modules
Even, negative input end of the negative input voltage terminal of N power conversion modules as power-supply system；N number of power modulus of conversion
Positive output end after the positive output voltage terminal connection of block as power-supply system, the negative output of N number of power conversion module
Negative output terminal after voltage terminal connection as power-supply system；The signal output terminal of first power conversion module is just hanging, the
The signal input terminal of one power conversion module is just just being connected with the signal output terminal of the second power conversion module, the second power
Module by signal lead-out terminal of the signal input terminal of modular converter just with the 3rd power conversion module is just being connected, and so on,
The signal input terminal of N-1 power conversion modules is just just being connected with the signal output terminal of N power conversion modules, N work(
The signal input terminal of rate modular converter is just connected with the negative output terminal of power-supply system；The output voltage of N power conversion modules
Sampling terminal is connected with the positive output end of power-supply system, the output voltage sampling terminal and electricity of remaining N-1 power conversion module
The negative output terminal of source system is connected.
Compared with prior art, the utility model has the advantages that：
(1), the output voltage of input series and output parallel system is constant, there is voltage stabilizing output；
(2), the implementation of input series and output parallel system is simple, only needs several lines that the string of module can be achieved simultaneously
Connection；
(3), the utility model employs modularized thoughts, and system is split into N number of identical standard module；
(4), the voltage stress of single standardized module and current stress are low, can reduce device cost；
(5), user directly can freely set up system using standard module as desired, and using flexible is portable high,
And requirement of the system to client is low, directly by the input series connection of module, output-parallel, it is not necessary to which this professional specialty is known
Know；
(6), using power-supply system needed for reference power supply module composition, reduce product type, reduce management of product cost；
(7), d. c. voltage signal is used between each standard module, multimode input series connection, output-parallel system are held very much
Easy fabric swatch, will not produce mutual interference.
Brief description of the drawings
The utility model patent Dual module input series and output parallel system frame of Fig. 1 Application No. 201621402396.3
Figure；
Dual module input series connection of the utility model patent of Fig. 2 Application No. 201621402396.3 with Voltage stabilizing module is defeated
Go out parallel system block diagram；
The input series and output parallel of the N number of standard module of utility model patent of Fig. 3 Application No. 201621402396.3
System block diagram；
The utility model patent of Fig. 4 Application No. 201621402396.3 carries the defeated of N number of standard module of Voltage stabilizing module
Enter to connect output-parallel system block diagram；
The functional block diagram of the power conversion module of Fig. 5 the utility model；
The pinouts of Fig. 6 the utility model power conversion modules；
Fig. 7 the utility model Dual module input series connection, the connection relation of output-parallel system；
The input series connection of the N number of module of Fig. 8 the utility model, the connection relation of output-parallel system；
The single power conversion module of Fig. 9 the utility model is connected to output voltage stabilizing operating mode schematic diagram；
The single power conversion module of Figure 10 the utility model is connected to input and presses operating mode schematic diagram；
Individual module schematic diagram in Figure 11 first embodiments primary side series connection secondary parallel system.
Embodiment
The technical concept of the utility model is to propose a kind of new double loop control technology scheme, i.e., a power supply turns
There are two loops, a loop in parallel operation to be used for controlling output voltage stabilization, and it is steady which is defined as output
Pressure ring；Another loop is used for the input voltage size of control module, which is defined as input grading ring, right
In the power-supply system of N number of module input series and output parallel, it can realize that each module input voltage is pressed by the loop.
Fig. 5 is the functional block diagram of the power conversion module of the utility model, and power conversion module includes：
7 element circuits：Main power circuit, control drive circuit, former secondary isolation circuit, loop isolation circuit, input
Isolate sample circuit, input grading ring, output regulation loop；
7 external terminals：Positive input voltage terminal, negative input voltage terminal, positive output voltage terminal, negative output voltage end
Son, signal input terminal just, signal output terminal just, output voltage sampling terminal；
It is that signal input terminal is born, signal output terminal is born and has been multiplexed negative input voltage terminal in this block diagram, therefore believes
Number input terminal is born to bear with signal output terminal not to be embodied in Figure 5；
Its connection relation is：The input terminal connection positive input voltage terminal of main power circuit and negative input voltage terminal, master
The output terminal connection positive output voltage terminal and negative output voltage terminal of power circuit；The input terminal of input isolation sample circuit connects
The negative output terminal that positive input voltage terminal is connect with negative input voltage terminal, input isolation sample circuit connects negative output voltage end
Son, the positive output end of input isolation sample circuit are connected to an input of the signal output terminal just with inputting grading ring at the same time
End, another input terminal for inputting grading ring are being connected to signal input terminal just, and the output terminal for inputting grading ring is connected to loop
One input terminal of isolation circuit；Output voltage sampling terminal is connected to output regulation loop, exports the output terminal connection of regulation loop
To another input terminal of loop isolation circuit；The output terminal of loop isolation circuit passes sequentially through former secondary isolation circuit, control
Main power circuit is connected to after drive circuit.
Main power circuit is used for carrying out input and output voltage isolated variable；Drive circuit is controlled to provide control for main power circuit
Signal processed；Former secondary isolation circuit carries out isolation transmission to signal；Loop isolation circuit is used for isolating two loops；Input is pressed
Ring is used for control input voltage swing；Output regulation loop is used for regulated output voltage；Input isolation sample circuit is used for gathering work(
The input voltage of rate modular converter, its input/output signal are linear.
Fig. 6 is the pinouts of the utility model power conversion module, including 7 terminals：Positive input voltage terminal Vg+, bear
Input voltage terminal Vg-, positive output voltage terminal Vo+, negative output voltage terminal Vo-, the positive Vg_s_in+ of signal input terminal, letter
Number positive Vg_s_out+ of lead-out terminal, output voltage sampling terminal Vo_s.
It is that signal input terminal is born to bear with signal output terminal and is multiplexed with negative output voltage terminal Vo- in Fig. 6,
The situation of a public terminal.
Fig. 7 is the utility model Dual module input series connection, the connection relation of output-parallel system；Fig. 8 is the utility model N
The input series connection of a module, the connection relation of output-parallel system.It should be noted that the two loops in same module
Do not work at the same time, it is necessary to respectively constitute output voltage stabilizing operating mode as shown in Figure 9 and such as Figure 10 institutes by exterior connection
Operating mode is pressed in the input shown, main operational principle is described as follows：
When module be connected to output voltage stabilizing operating mode when, as shown in figure 9, input grading ring do not work, pass through by
The signal input terminal of power conversion module is presently connected to the realization of negative output voltage terminal, and the output voltage of power conversion module is adopted
Sample terminal is connected with positive output voltage terminal, realizes the effect of sampling and outputting voltage.In this way, the power conversion module only has one
Regulation loop is exported, its course of work is as regular tap power supply, and details are not described herein.
When module be connected to input press operating mode when, as shown in Figure 10, output regulation loop do not work, pass through by
The output voltage sampling terminal of power conversion module is connected realization, the signal input of power conversion module with negative output voltage terminal
Terminal is just just being connected with the signal output terminal of another power conversion module (as loop sampled signal), in power modulus of conversion
It is in the block input grading ring module in, compare the signal output terminal of itself just (as loop reference signal) with another work(
The positive signal magnitude of the signal output terminal of rate modular converter, produces the Pressure and Control signal of control duty cycle, control input electricity
The size of pressure, such as so that the input voltage of two modules is equal, that is, realizes that the input of two modules is pressed.In this way, the power turns
Mold changing block only have one input grading ring, except loop sampled signal is different from loop reference signal, other courses of work and commonly
Switching Power Supply is the same, and details are not described herein.
It is single to use word description principle, those skilled in the art can be allowed to understand difficult, so, use principle figure please be allow,
Common signal stream always illustrates the operation principle of the utility model patent in cooperation electronic engineering.Described further below practicality
New specific embodiment.
First embodiment
The operation principle of the utility model patent first embodiment power-supply system：
Shown in Figure 11, for the circuit realization principle figure of each module in Dual module input series connection, output-parallel power-supply system.
The module includes 7 submodules：Main power circuit 101, control drive circuit 102, former secondary isolation circuit 103,
Loop isolation circuit 105, input isolation sample circuit 104, input grading ring 107, output regulation loop 106；
The module includes 7 terminals：Positive input voltage terminal Vg+, negative input voltage terminal Vg-, positive output voltage terminal
Vo+, negative output voltage terminal Vo-, the positive Vg_s_in+ of signal input terminal, the positive Vg_s_out+ of signal output terminal, output voltage
Sampling terminal Vo_s.
The module by signal input terminal is born to bear with signal output terminal and is multiplexed with negative output voltage terminal Vo-, and
And be connected with secondary ground terminal, each submodule internal component and connection relation are as follows：
Main power circuit 101：For asymmetrical half-bridge flyback topologies, by capacitance Cin, S1 and S2, inductance Lr, capacitance are switched
Cr, transformer T, transformer primary side winding Np, transformer secondary winding Ns, diode D1, capacitance C1, inductance L1 and capacitance C2 groups
Into；Capacitance Cin is in parallel with positive input voltage terminal Vg+ and negative input voltage terminal Vg-, negative input voltage terminal Vg- and primary side
Ground terminal connects；Switch the tie point of drain electrode connection capacitance Cin and the positive input voltage terminal Vg+ of S1, switch the source electrode of S1 with
Inductance Lr one end connects, and switchs drain electrode of the source electrode of S1 also with switching S2 and is connected, switchs the source electrode connection primary side ground terminal of S2, electricity
Feel the other end connection transformer primary side winding Np Same Name of Ends of Lr；Capacitance Cr one end connects with transformer primary side winding Np different names end
Connecing, capacitance Cr other ends connection primary side ground terminal, the secondary different name end for becoming winding Ns of transformer is connected with the anode of diode D1, and two
The cathode of pole pipe D1 is connected with one end of capacitance C1, inductance L1, and the other end of inductance L1 is connected with capacitance C2 one end, is formed just defeated
Go out voltage terminal Vo+, the secondary Same Name of Ends for becoming winding Ns of transformer is connected with capacitance C1, the capacitance C2 other ends, and accesses secondary and connect
Ground terminal.
Control drive circuit 102：By control chip UC3843, drive circuit, circuit sampling circuit, capacitance Cq1, capacitance
Cq2, capacitance Ct, capacitance Cv2, resistance Rt, resistance Rv2, resistance Rv3, resistance R3 compositions；Capacitance Cq1 one end and chip UC3843
Vcc pins, voltage vcc _ p connections, the Vcc pins of control chip UC3843 take electricity, the capacitance Cq1 other ends from power Vcc _ p
It is connected at the same time with GND pin, the primary side ground terminal of chip UC3843；The output OUT pins of drive circuit and chip UC3843 connect
Connect, and export two-way drive signal Vgs1 and Vgs2 respectively to switch S1 and the grid of switch S2, carried for switch S1 and switch S2
For switch controlling signal, to prevent two common short circuits of switching tube S1 and S2 in asymmetrical half-bridge flyback topologies, two-way driving
Certain dead time that staggers is needed between signal Vgs1 and Vgs2, passes through prototype test, the present embodiment value 300nS；Electric current is adopted
The first input end of sample circuit and the second input terminal are in parallel with the capacitance Cr of main power circuit, the output terminal of current sampling circuit with
The CS pins connection of control chip UC3843；Capacitance Cq2 one end connects primary side ground terminal, the capacitance Cq2 other ends while linker
The Vref pins of quasi- voltage Vref, resistance Rt one end and control chip UC3843, the resistance Rt other ends connect control chip at the same time
The RT/CT pins of UC3843 and capacitance CT one end, capacitance CT other ends access primary side ground terminal；Capacitance Cv2 and resistance Rv2 is simultaneously
Connection, the Comp pins of resistance Rv2 one end connection control chip UC3843, the resistance Rv2 other ends at the same time with resistance Rv3 one end, control
The Vfb pins connection of coremaking piece UC3843, is here formed as the feedback pin that voltage Vc2, Vfb pin are chip UC3843, resistance
Transistor emitter of the Rv3 other ends at the same time with optocoupler in resistance R3, former secondary isolation circuit be connected, the resistance R3 other ends and
Primary side ground terminal connects.
Former secondary isolation circuit 103：It can be achieved using optocoupler plus peripheral circuit；By optocoupler OC1, resistance R1, resistance R2
Composition；The diode cathode of optocoupler OC1 is connected with resistance R2 one end at the same time, the resistance R2 other ends while two poles with optocoupler OC1
Tube anode is connected with resistance R1 one end, and the resistance R1 other ends are connected with voltage end Vcc_s, the transistor collector of optocoupler OC1 with
Reference voltage terminal Vref connections, the transistor emitter of optocoupler OC1 are connected with the tie point of Rv3 and R3 in control drive circuit.
Export regulation loop 106：By LM358 operational amplifier As 1, capacitance Cv1, resistance Rv1, resistance Ra, controllable accurate voltage stabilizing
Source TL431, resistance Rf1 and resistance Rf1 compositions；Resistance Rf1 one end is connected with output voltage sampling terminal Vo_s, and resistance Rf1 is another
One end is connected with resistance Rf2 one end, and the resistance Rf2 other ends are connected with negative output voltage terminal Vo- and secondary ground terminal at the same time, fortune
Calculate the negative input end of amplifier and the tie point of Rf1 and Rf2, Rv1 one end are connected, the Rv1 other ends are connected with capacitance Cv1, capacitance
The Cv1 other ends access the output terminal of operational amplifier A 1, and are connected with the cathode of the diode D2 in loop isolation circuit；It is controllable
The anode of precision voltage regulator TL431 is connected with secondary ground terminal, and the adjustable end of controllable accurate source of stable pressure TL431 connects resistance at the same time
Ra one end and the positive input terminal of operational amplifier A 1, the resistance Ra other ends are connected with voltage vcc _ s, controllable accurate source of stable pressure
The cathode of TL431 is connected with the positive input terminal of operational amplifier A 1.
Input isolation sample circuit 104：It is made of linear sample circuit and signal isolation circuit；Input isolation sample circuit
First input end be connected with positive input voltage terminal Vg+, the second input terminal and the primary side ground terminal of input isolation sample circuit
Connection, the first output terminal of input isolation sample circuit are connected with the positive Vg_s_out+ of signal output terminal, input isolation sampling
Second output terminal of circuit is connected with secondary ground terminal.
Input grading ring 107：By LM358 operational amplifier As 2, capacitance Ci1, resistance Ri1, resistance R4, resistance R5, resistance
R6 and resistance R7 compositions；Resistance R6 one end connects the positive Vg_s_out+ of signal output terminal, the resistance R6 other ends and resistance R5 mono-
End, the positive input terminal connection of operational amplifier A 2, the resistance R5 other ends are connected with secondary ground terminal；Resistance R7 one end connects signal
Lead-out terminal positive Vg_s_in+, resistance the R7 other end connects resistance R4 one end, resistance Ril one end and operational amplifier A 2 at the same time
Negative input end, resistance R4 other ends connection secondary ground terminal, the resistance Ril other ends are connected with capacitance Cil one end, and capacitance Cil is another
Cathode of the one end at the same time with the diode D3 in the output terminal of operational amplifier A 2, loop isolation circuit is connected.
Loop isolation circuit 105：Connected using two diode D2 as depicted and D3 progress common-anodes and can be achieved,
Common anode extremely connects the diode cathode of optocoupler OC1, and the cathode of two diodes D2 and D3 connects output regulation loop and defeated respectively
Enter the output terminal of operational amplifier A 1 and A2 in grading ring.
Consider from standardization, two rings are devised in each module：One output regulation loop, an input grading ring.
Can be by simple external cabling, to realize that the module of not same-action works.When needing to become Voltage stabilizing module, as long as by mould
The positive V of block signal input terminalg_s_In+ is connected to output ground, output voltage sampling terminal vo_sIt is connected to output voltage terminal；When need
, only need to be by output voltage sampling terminal v when becoming pressure moduleo_sIt is connected to output ground, the positive V of module by signal input terminalg_s_
In+ is connected to the positive V of module by signal lead-out terminal of next moduleg_s_out+.Pressure module and output are inputted in the present embodiment
The connection of Voltage stabilizing module can be achieved using the pin mode of connection of Fig. 9 and Figure 10, no longer former with the specific module shown in Figure 11
Reason figure carries out drafting displaying.
The connection of Dual module input series and output parallel power-supply system can be achieved using the pin mode of connection of Fig. 7, its
Middle lower module is connected to an output voltage stabilizing closed-loop control, claims Voltage stabilizing module；Upper module is connected to an input and presses off
Ring controls, and claims pressure module；Each module only has a closed loop and is working.It is generalized to the input series connection of N number of module, exports simultaneously
It is coupled structure as shown in figure 8, only one of which module is connected to an output voltage stabilizing closed-loop control, remaining module is connected
It is connected into an input grading ring control.
Operation principle：
In this embodiment, whole system is made of upper and lower two power conversion modules series connection input, Parallel opertation, single
The main power stage operation principle of power conversion module is with asymmetrical half-bridge circuit of reversed excitation, this is for a person skilled in the art
It is known technology, is not unfolded herein.Control process is as follows：
The output voltage sampling terminal v of upper moduleo_s1It is connected to output ground, then computing in the output voltage stabilizing ring element of upper module
Amplifier A1 saturations, the output voltage of operational amplifier is close to its supply voltage, therefore two poles in loop isolation circuit unit
Pipe D21 ends, and the output voltage stabilizing loop of upper module is shielded at this time.The positive V of upper module signal input terminalg_s_in1+It is connected to lower die
The positive V of module by signal lead-out terminal of blockg_s_out2+, the positive V of module by signal lead-out terminal of upper module oneself in itselfg_s_out1+As ginseng
Examine, the positive V of module by signal lead-out terminal with lower moduleg_s_out2+It is compared, when the input voltage Vg1 of upper module is higher than lower die
During the input voltage Vg2 of block, after inputting isolation sample circuit, the positive V of module by signal lead-out terminal of upper moduleg_s_out1+Just
More than the positive V of module by signal lead-out terminal of lower moduleg_s_out2+, then the rise of grading ring unit output voltage, stream are inputted in upper module
Electric current into optocoupler OC11 luminous tubes is reduced, so that FB feet voltage reduces in the control circuit of upper module, the rise of COMP feet voltage,
The output duty cycle increase of control circuit, so that the power increase of upper module transmission, the electricity of the input capacitance Cin1 of upper module
Drops, tend to be identical so as to fulfill the input voltage of upper and lower module.
The positive V of module by signal input terminal of lower moduleg_s_in+Output ground is connected to, then in the input grading ring unit of lower module
2 saturation of operational amplifier A, the output voltage of operational amplifier is close to its supply voltage, therefore in loop isolation circuit unit
Diode D32 ends, and the input grading ring road of lower module is shielded at this time.The output voltage sampling terminal v of lower moduleo_sIt is connected to
Output voltage terminal is to realize common output regulation loop work, which is existing known technology, not reinflated herein.
Two 60W of the present embodiment, input voltage range are the calibration power modular converter conduct of 120VDC~240VDC
Connection in series-parallel forms the power-supply system of a 120W, and reality has been carried out to its input series and output parallel effect under closed-loop work
Verification.In order to fully verify that the utility model presses precision, output to flow precision and output voltage under tolerance to inputting
The influence of precision, tolerance experimental verification has been carried out to it.Examine two by two kinds of extreme deviations of control parameter and power stage parameter
Kind extreme deviations, by the size of power conversion module gain, are combined into a kind of module of two kinds of new extreme deviations.From theory
On, gain is maximum and the two modules of gain minimum correspond to following parameters respectively：
The module of gain maximum：Magnetizing inductance minimum value, leakage inductance minimum value, resonant capacitance minimum value, frequency minima,
I.e.： Lm(min),Lr(min),Cr(min),fs(min)；
The module of gain minimum：Magnetizing inductance maximum, leakage inductance maximum, resonant capacitance maximum, frequency maxima,
I.e.： Lm(max),Lr(max),Cr(max),fs(max)。
By four above-mentioned parameter combinations into following six groups of experiment parameters：
Combination 1：Power stage and control are input series connection/output-parallel experiment of nominal parameters
A module parameters：Lm=145 μ H, Lr=6.37 μ H, Cr=0.27 μ F, fs=100KHz
B module parameters：Lm=145 μ H, Lr=6.37 μ H, Cr=0.27 μ F, fs=100KHz
Combination 2：Power stage is standard parameter, but switching frequency is respectively input series connection/output-parallel reality of upper lower deviation
Test
A module parameters：Lm=145 μ H, Lr=6.37 μ H, Cr=0.27 μ F, fs=90KHz
B module parameters：Lm=145 μ H, Lr=6.37 μ H, Cr=0.27 μ F, fs=110KHz
Combination 3：Switching frequency is nominal parameters, but power stage is respectively input series connection/output-parallel reality of upper lower deviation
Test
A module parameters：Lm=130.5 μ H, Lr=5.733 μ H, Cr=0.216 μ F, fs=100KHz
B module parameters：Lm=159.5 μ H, Lr=7.007 μ H, Cr=0.324 μ F, fs=100KHz
Combination 4：Switching frequency and power stage parameter are respectively input series connection/output-parallel experiment of upper lower deviation
A module parameters：Lm=130.5 μ H, Lr=5.733 μ H, Cr=0.216 μ F, fs=90KHz
B module parameters：Lm=159.5 μ H, Lr=7.007 μ H, Cr=0.324 μ F, fs=110KHz
Combination 5：Switching frequency is nominal parameters, but power stage is respectively input series connection/output-parallel reality of upper lower deviation
Test
A module parameters：Lm=159.5 μ H, Lr=7.007 μ H, Cr=0.324 μ F, fs=100KHz
B module parameters：Lm=130.5 μ H, Lr=5.733 μ H, Cr=0.216 μ F, fs=100KHz
Combination 6：Switching frequency and power stage parameter are respectively input series connection/output-parallel experiment of the lower upper deviation
A module parameters：Lm=159.5 μ H, Lr=7.007 μ H, Cr=0.324 μ F, fs=110KHz
B module parameters：Lm=130.5 μ H, Lr=5.733 μ H, Cr=0.216 μ F, fs=90KHz
Tested according to six groups of above-mentioned combinations, for the experimental result drawn as shown in table 4 to table 7, table 4 is different inputs
Under voltage, the maximum input voltage of various parameters combination presses precision；Table 5 be different input voltages under, various parameters combination
Fully loaded output current flows precision；Table 6 is under different input voltages and output full load conditions, the output of various parameters combination is electric
Pressure；Table 7 controls the grading ring and regulation loop go-and-return test result of closed-loop experiment for the actual PCM in outer power supply DC-DC parts.
Under the different input voltages of table 4, the maximum input voltage of various parameters combination presses precision
| Press precision | Combination 1 | Combination 2 | Combination 3 | Combination 4 | Combination 5 | Combination 6 |
| Vg=300V | ± 0.87% | ± 0.2% | ± 0.2% | ± 0.67% | ± 0.6% | ± 0.47% |
| Vg=400V | ± 0.8% | ± 0.25% | ± 0.3% | ± 0.5% | ± 0.55% | ± 0.6% |
| Vg=530V | ± 0.42% | ± 0.23% | ± 0.15% | ± 0.42% | ± 0.38% | ± 0.45% |
Under the different input voltages of table 5, the fully loaded output current of various parameters combination flows precision
| Flow precision | Combination 1 | Combination 2 | Combination 3 | Combination 4 | Combination 5 | Combination 6 |
| Vg=300V | ± 0.46% | ± 0.09% | ± 0.09% | ± 0.37% | ± 0.09% | ± 0.18% |
| Vg=400V | ± 0.37% | ± 0.37% | ± 0.09% | ± 0.65% | ± 0.18% | ± 0.46% |
| Vg=530V | ± 0.37% | ± 0.46% | ± 0.09% | ± 0.74% | ± 0.37% | ± 0.65% |
Under the different input voltages of table 6 and output full load conditions, the output voltage (V) of various parameters combination
| Output voltage | Combination 1 | Combination 2 | Combination 3 | Combination 4 | Combination 5 | Combination 6 |
| Vg=300V | 12.01 | 12.01 | 12.01 | 12.01 | 12.01 | 12.01 |
| Vg=400V | 12.01 | 12.01 | 12.01 | 12.00 | 12.00 | 12.00 |
| Vg=530V | 11.98 | 11.98 | 11.99 | 11.98 | 11.98 | 11.98 |
The actual PCM in DC-DC parts that powers outside table 7 controls the grading ring and regulation loop go-and-return test result of closed-loop experiment
From experimental result as can be seen that combination 1 to combination 6 input press precision and output flow precision all 1% with
Interior, output voltage precision also within 1%, inputs more than the bandwidth 1KHz of grading ring, and have very big phase margin and increasing
Beneficial nargin, loop stability is fine, meets the requirement of input balanced pressure system.
The utility model can fully be proved by above-mentioned experiment, can not only meet that precision and defeated is pressed in input
Go out and flow precision, it is often more important that output voltage precision can be controlled 1% or so, realized not only to press and flowed, but also stablizes output
The purpose of voltage, attains a yet higher goal than the prior art.
It the above is only the preferred embodiment of the utility model, it is noted that above-mentioned preferred embodiment should not regard
For the limitation to the utility model.For those skilled in the art, the essence of the utility model is not being departed from
In god and scope, some improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection model of the utility model
Enclose, no longer repeated here with embodiment, the scope of protection of the utility model should be subject to claim limited range.
Claims (8)
- A kind of 1. power conversion module, it is characterised in that：Including 7 element circuits：Main power circuit, control drive circuit, former secondary isolation circuit, loop isolation circuit, input Isolate sample circuit, input grading ring, output regulation loop；Including 9 external terminals：Positive input voltage terminal, negative input voltage end Son, positive output voltage terminal, negative output voltage terminal, signal input terminal just, signal input terminal bear, signal output terminal Just, signal output terminal bear, output voltage sampling terminal；Its connection relation is：The input terminal connection positive input voltage terminal and negative input voltage terminal, main power of main power circuit The output terminal connection positive output voltage terminal and negative output voltage terminal of circuit；The input terminal connection of input isolation sample circuit is just Input voltage terminal and negative input voltage terminal, the negative output terminal of input isolation sample circuit connect negative output voltage terminal at the same time Born with signal output terminal, the positive output end of input isolation sample circuit is connected to signal output terminal and is just pressed with input at the same time One input terminal of ring, another input terminal for inputting grading ring are being connected to signal input terminal just, are exporting the 3rd of grading ring A input terminal is connected to signal input terminal and bears, and the output terminal for inputting grading ring is connected to an input of loop isolation circuit End；Output voltage sampling terminal is connected to output regulation loop, and the output terminal for exporting regulation loop is connected to the another of loop isolation circuit One input terminal；The output terminal of loop isolation circuit is connected to master after passing sequentially through former secondary isolation circuit, control drive circuit Power circuit；The function of each terminal is：Positive input voltage terminal and negative input voltage terminal, for input voltage；Positive output voltage terminal With negative output voltage terminal, for output voltage；Signal input terminal is just born with signal input terminal, is connect for inputting grading ring By external signal；Signal output terminal is just born with signal output terminal, for isolating sample circuit output sampled signal；Output electricity Sampling terminal is pressed, for inputting the voltage for needing to sample；Each unit circuit function is：Main power circuit, carries out isolated variable to input voltage, obtains output voltage；Drive circuit is controlled, switch controlling signal is provided for the power switch of main power circuit；Former secondary isolation circuit, isolation transmission is carried out to switch controlling signal；Regulation loop is exported, controls output voltage stabilization；Input isolation sample circuit, gathers input voltage, and export sampled signal to signal output terminal just；Grading ring is inputted, compares the size of sampled signal and external signal, the size of control input voltage；Loop isolation circuit, isolation output regulation loop and input grading ring.
- 2. power conversion module according to claim 1, it is characterised in that：Negative output voltage terminal, signal input terminal The negative and minus 3 outer end submultiplexs of signal output terminal.
- 3. power conversion module according to claim 1 or 2, it is characterised in that：Main power circuit uses asymmetrical half-bridge Flyback topologies.
- 4. power conversion module according to claim 3, it is characterised in that：Two in asymmetrical half-bridge flyback topologies are opened Close to stagger between the drive pulse signal of pipe and one prevent common short-circuit dead time.
- 5. power conversion module according to claim 4, it is characterised in that：The dead time is 300nS.
- 6. power conversion module according to claim 1 or 2, it is characterised in that：Output voltage sampling terminal is defeated with bearing Go out voltage terminal connection, the function of shielding output regulation loop.
- 7. power conversion module according to claim 1 or 2, it is characterised in that：Input a signal into terminal just with negative output Voltage terminal connects, the function of shielding input grading ring.
- A kind of 8. power-supply system, it is characterised in that：Including the power conversion module described in N number of claim 1 or claim 2, N For the natural number more than 1, its connection relation is：The positive input voltage terminal of first power conversion module be power-supply system just Input terminal, the negative input voltage terminal of the first power conversion module and the positive input voltage terminal phase of the second power conversion module Even, the negative input voltage terminal of the second power conversion module is connected with the positive input voltage terminal of the 3rd power conversion module, according to It is secondary to analogize, the negative input voltage terminal of N-1 power conversion modules and the positive input voltage terminal phase of N power conversion modules Even, negative input end of the negative input voltage terminal of N power conversion modules as power-supply system；N number of power modulus of conversion Positive output end after the positive output voltage terminal connection of block as power-supply system, the negative output of N number of power conversion module Negative output terminal after voltage terminal connection as power-supply system；The signal output terminal of first power conversion module is just hanging, the The signal input terminal of one power conversion module is just just being connected with the signal output terminal of the second power conversion module, the second power Module by signal lead-out terminal of the signal input terminal of modular converter just with the 3rd power conversion module is just being connected, and so on, The signal input terminal of N-1 power conversion modules is just just being connected with the signal output terminal of N power conversion modules, N work( The signal input terminal of rate modular converter is just connected with the negative output terminal of power-supply system；The output voltage of N power conversion modules Sampling terminal is connected with the positive output end of power-supply system, the output voltage sampling terminal and electricity of remaining N-1 power conversion module The negative output terminal of source system is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720986966.6U CN207283410U (en) | 2017-08-09 | 2017-08-09 | A kind of power conversion module and the power-supply system being made of the power conversion module connection in series-parallel |
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| CN201720986966.6U CN207283410U (en) | 2017-08-09 | 2017-08-09 | A kind of power conversion module and the power-supply system being made of the power conversion module connection in series-parallel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370387A (en) * | 2017-08-09 | 2017-11-21 | 广州金升阳科技有限公司 | A kind of power conversion module and the power-supply system being made up of the power conversion module connection in series-parallel |
| CN109861497A (en) * | 2018-12-30 | 2019-06-07 | 国网北京市电力公司 | Sharing control device |
-
2017
- 2017-08-09 CN CN201720986966.6U patent/CN207283410U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370387A (en) * | 2017-08-09 | 2017-11-21 | 广州金升阳科技有限公司 | A kind of power conversion module and the power-supply system being made up of the power conversion module connection in series-parallel |
| CN107370387B (en) * | 2017-08-09 | 2023-10-20 | 广州金升阳科技有限公司 | Power conversion module and power supply system formed by serial-parallel connection of power conversion modules |
| CN109861497A (en) * | 2018-12-30 | 2019-06-07 | 国网北京市电力公司 | Sharing control device |
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