CN102347683B - Parallel connection jitter frequency switch power supply and method - Google Patents
Parallel connection jitter frequency switch power supply and method Download PDFInfo
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Abstract
The invention relates to a parallel connection jitter frequency switch power supply, which comprises a switch driving module and at least two power supply modules in electric parallel connection, wherein the switch driving module sends out at least two switch driving signals for correspondingly driving at least two power supply modules, and the switch frequencies of at least two switch driving signals are fixed and are different. The invention also correspondingly provides a parallel connection jitter frequency method for the switch power supply. Through setting fixed and different switch frequencies for each power supply module or further setting fixed and different switch frequency for power supply sub modules in the power supply module, the harmonic interference is effectively scattered, the harmonic interference energy is reduced, and the electromagnetic interference (EMI) problem of the whole switch power supply system is solved.
Description
Technical field
The present invention relates to power technology, more particularly, relate to a kind of Switching Power Supply and method that adopts parallel connection jitter frequency technology.
Background technology
Switching Power Supply is due to higher dv/dt and di/dt, and the stray inductance existing in its circuit and electric capacity make the more difficult elimination of the electromagnetic interference noise of Switching Power Supply.At present, in order to solve the EMI(Electromagnetic Interference of power-supply system, electromagnetic interference) problem, existing Switching Power Supply adopts the mode of the operating frequency of control switch power supply conventionally, makes it be cyclic variation.Because the operating frequency of Switching Power Supply not immobilizes, make the distribution that becomes band of harmonic wave frequency, spectrum energy is also dispersed on noise band, and total energy is the same, thus the amplitude of noise on whole frequency band is reduced.
Yet power-supply system is formed in parallel by least two power modules conventionally at present.In humorous wave interference, also there is humorous wave interference in single supply module memory not only between each power module.And existing Switching Power Supply only controls harmonic reduction to disturb to the operating frequency of single supply module.When the operating frequency of at least two power modules is controlled, there is many difficult problems, for example how reasonably to distribute the operating frequency between modules, to realize effective dispersion of spectrum energy etc.If can not solve the problem that has humorous wave interference between each power module, the various aspects of performance that makes whole system is difficult to improve, THD(Total Harmonic Distortion for example, total harmonic distortion), PF(Power Factor, power factor), the aspect such as efficiency.
Summary of the invention
The technical problem to be solved in the present invention is, has the problem of humorous wave interference between above-mentioned each power module for existing Switching Power Supply, and a kind of Switching Power Supply and parallel connection jitter frequency method thereof that adopts parallel connection jitter frequency technology is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of Switching Power Supply, adopt parallel connection jitter frequency technology, by carry out communication be each power module different for each power module arranges between each power module of Switching Power Supply, set different switching frequencies, its humorous wave interference producing is dispersed in certain limit, thereby has reduced harmonic wave interfering energy.
First aspect present invention, a kind of parallel connection jitter frequency Switching Power Supply is provided, at least two power modules that comprise switch drive module and electric parallel connection, described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and described master switch driver module further comprises:
Data acquisition unit, for quantity information and the address information of at least two power modules described in collection when described Switching Power Supply powers on;
Frequency allocation units, for according to described quantity information being the mutual unequal switching frequency of the corresponding distribution of described at least two power modules;
Signal output unit, for exporting respectively corresponding switching drive signal to described at least two power modules according to described switching frequency and address information.
In parallel connection jitter frequency Switching Power Supply of the present invention, at least two switching frequencies corresponding to power module difference described in described frequency allocation units calculate according to the following formula of described quantity information utilization:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
In parallel connection jitter frequency Switching Power Supply of the present invention, described frequency allocation units go out switching frequency f corresponding to i block power supply module by the bar code order permutation calculation of power module
i.
In a second aspect of the present invention, a kind of parallel connection jitter frequency Switching Power Supply is provided, at least two power modules that comprise switch drive module and electric parallel connection, described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to;
Described main switch driver module comprises:
Data acquisition unit, for quantity information and the address information of at least two power modules described in collection when described Switching Power Supply powers on;
Frequency allocation units, for according to described quantity information being the mutual unequal switching frequency of the corresponding distribution of described at least two power modules;
Signal output unit, for driving described main power source module according to switching frequency corresponding to described main power source module and address information generation switching drive signal;
Data output unit, for according to described address information by described at least one from switching frequency corresponding to power module, send to respectively corresponding to switch drive module.
In parallel connection jitter frequency Switching Power Supply of the present invention, described at least one switching frequency receiving according to correspondence from switch drive module generates switching drive signal and drives corresponding to power module.
In parallel connection jitter frequency Switching Power Supply of the present invention, at least two switching frequencies corresponding to power module difference described in described frequency allocation units calculate according to the following formula of described quantity information utilization:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
In parallel connection jitter frequency Switching Power Supply of the present invention, described frequency allocation units go out switching frequency f corresponding to i block power supply module by the bar code order permutation calculation of power module
i.
In a third aspect of the present invention, a kind of parallel connection jitter frequency Switching Power Supply is provided, at least two power modules that comprise switch drive module and electric parallel connection, described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Each in described at least two power modules comprises at least one power supply submodule; Described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and described master switch driver module comprises:
Data acquisition unit, for quantity information and the address information of all power supply submodules of at least two power modules described in gathering when described Switching Power Supply powers on;
Frequency allocation units, for the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information;
Signal output unit, for exporting respectively corresponding switching drive signal to the power supply submodule of described at least two power modules according to described switching frequency and address information.
In a fourth aspect of the present invention, a kind of parallel connection jitter frequency Switching Power Supply is provided, at least two power modules that comprise switch drive module and electric parallel connection, described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to;
Each in described at least two power modules comprises at least one power supply submodule; And described main switch driver module comprises:
Data acquisition unit, for the quantity information of all power supply submodules of at least two power modules described in gathering when described Switching Power Supply powers on, and the address information of described at least two power modules;
Frequency allocation units, for the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information;
Signal output unit, for obtaining the address information corresponding to power supply submodule of described main power source module, and generate switching drive signal to drive the power supply submodule of described main power source module according to switching frequency corresponding to the power supply submodule of described main power source module and address information;
Data output unit, for according to described at least one from address information corresponding to power module, by described at least one from switching frequency corresponding to the power supply submodule of power module, send to respectively corresponding to switch drive module.
In parallel connection jitter frequency Switching Power Supply of the present invention, the described address information of obtaining corresponding power supply submodule from switch drive module, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.
In a fifth aspect of the present invention, a kind of parallel connection jitter frequency method of Switching Power Supply is provided, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, when described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, described step S1 further comprises the following steps that order is carried out:
A1, by master switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of at least two power modules;
A2, by master switch driver module, according to described quantity information, to be that described at least two power modules are corresponding distribute mutual unequal switching frequency;
A3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to described at least two power modules.
In parallel connection jitter frequency method of the present invention, at least two switching frequencies corresponding to power module difference described in the following formula calculating of utilization in described steps A 2:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
In parallel connection jitter frequency method of the present invention, the bar code order permutation calculation by power module in described steps A 2 goes out switching frequency f corresponding to i block power supply module
i.
In a sixth aspect of the present invention, a kind of parallel connection jitter frequency method of Switching Power Supply is provided, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to; Described step S1 further comprises:
B1, by main switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of at least two power modules, go to step subsequently B2;
B2, by main switch driver module, according to described quantity information, be corresponding mutual unequal switching frequency, subsequently executed in parallel step B3 and the step B4 of distributing of described at least two power modules;
B3, by main switch driver module, according to switching frequency corresponding to described main power source module and address information, generate switching drive signal and drive described main power source module;
B4, by main switch driver module according to described address information by described at least one from switching frequency corresponding to power module, send to respectively correspondingly to switch drive module, by described at least one switching frequency receiving according to correspondence from switch drive module, generate switching drive signal and drive corresponding to power module.
In parallel connection jitter frequency method of the present invention, at least two switching frequencies corresponding to power module difference described in the following formula calculating of utilization in described step B2:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
In parallel connection jitter frequency method of the present invention, the bar code order permutation calculation by power module in described step B2 goes out switching frequency f corresponding to i block power supply module
i.
In a seventh aspect of the present invention, a kind of parallel connection jitter frequency method of Switching Power Supply is provided, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, when described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and when each in described at least two power modules comprises at least one power supply submodule, described step S1 further comprises the following steps that order is carried out:
C1, by master switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of all power supply submodules of at least two power modules;
C2, the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information by master switch driver module;
C3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to the power supply submodule of described at least two power modules.
In a eighth aspect of the present invention, a kind of parallel connection jitter frequency method of Switching Power Supply is provided, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to; And each in described at least two power modules comprises at least one power supply submodule; Described step S1 further comprises:
D1, by main switch driver module, when described Switching Power Supply powers on, gathered described in the quantity information of all power supply submodules of at least two power modules, and the address information of described at least two power modules, goes to step D2 subsequently;
D2, corresponding mutual unequal switching frequency, subsequently executed in parallel step D3 and the step D4 of distributing of all power supply submodules that are described at least two power modules according to described quantity information by main switch driver module;
D3, by main switch driver module, obtained the address information corresponding to power supply submodule of described main power source module, and generate switching drive signal to drive the power supply submodule of described main power source module according to switching frequency corresponding to the power supply submodule of described main power source module and address information;
D4, by main switch driver module according to described at least one from address information corresponding to power module, by described at least one from switching frequency corresponding to the power supply submodule of power module, send to respectively corresponding to switch drive module, by the described address information of obtaining corresponding power supply submodule from switch drive module, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.
Implement parallel connection jitter frequency Switching Power Supply of the present invention and method thereof, there is following beneficial effect: the present invention is that each power module is set different switching frequencies by switch drive module, or for the power supply submodule in power module is set different switching frequencies, thereby effectively humorous wave interference is disperseed, reduce harmonic wave interfering energy, solved the EMI problem of whole switch power supply system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of parallel connection jitter frequency Switching Power Supply the first embodiment provided by the invention;
Fig. 2 is the schematic diagram of the master switch driver module of parallel connection jitter frequency Switching Power Supply the first embodiment provided by the invention;
Fig. 3 is the schematic diagram of parallel connection jitter frequency Switching Power Supply the second embodiment provided by the invention;
Fig. 4 is the schematic diagram of the main switch driver module of parallel connection jitter frequency Switching Power Supply the second embodiment provided by the invention;
Fig. 5 is the schematic diagram of parallel connection jitter frequency Switching Power Supply the 3rd embodiment provided by the invention;
Fig. 6 is the schematic diagram of parallel connection jitter frequency Switching Power Supply the 4th embodiment provided by the invention;
Fig. 7 is harmonic wave interference profile schematic diagram in parallel connection jitter frequency Switching Power Supply provided by the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.
Parallel connection jitter frequency Switching Power Supply provided by the invention comprises switch drive module and at least two power modules in parallel.The present invention adopts frequency jitter technique between each power module, at least two power modules described in sending that at least two switching drive signals are corresponding and drive by switch drive module, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal.The present invention mainly can adopt in two ways and implement, and is respectively the first embodiment and the second embodiment embodies.
Referring to Fig. 1, is the schematic diagram of parallel connection jitter frequency Switching Power Supply the first embodiment provided by the invention.As shown in Figure 1, in the first embodiment.Parallel connection jitter frequency Switching Power Supply comprises the power module of N electric parallel connection, i.e. the first power module 100-1 to the N power module 100-N, and wherein N is more than or equal to 2.Described switch drive module is the master switch driver module 200 being electrically connected to described at least two power modules simultaneously.
Referring to Fig. 2, is the module diagram of master switch driver module in parallel connection jitter frequency Switching Power Supply the first embodiment provided by the invention.As shown in Figure 2, described master switch driver module 200 further comprises data acquisition unit 210, frequency allocation units 220 and signal output unit 230.
Wherein, described data acquisition unit 210 is for quantity information and the address information of at least two power modules described in collection when described Switching Power Supply powers on, obtain the quantity N of the first power module 100-1 to the N power module 100-N in parallel in Switching Power Supply, and address information separately.
Signal output unit 230 is connected with frequency allocation units 220 with data acquisition unit 210 simultaneously, for exporting respectively corresponding switching drive signal to described at least two power modules according to described switching frequency and address information, generate respectively the first switching drive signal to the N switching drive signal, and utilize the address information of the first power module 100-1 to the N power module 100-N that data acquisition unit 210 obtains, these switching drive signal correspondences are sent to each power module.For example, generate and there is the first switching frequency f
1the first switching drive signal, and utilize the address information of the first power module 100-1 that this first switching drive signal is sent to the first power module 100-1.Similarly, generate and there is second switch frequency f
2second switch drive signal, and utilize the address information of second source module 100-2 to drive signal to send to second source module 100-2 this second switch.Until drive all the first power module 100-1 to the N power module 100-N work.Due to the first power module 100-1, second source module 100-2 ... the switching frequency of the switching drive signal that N power module 100-N receives is neither identical, the humorous wave interference that each power module produces is dispersed in certain limit, thereby has reduced harmonic wave interfering energy.
Referring to Fig. 3, is the schematic diagram of parallel connection jitter frequency Switching Power Supply the second embodiment provided by the invention.As shown in Figure 3, parallel connection jitter frequency Switching Power Supply comprises the power module of N electric parallel connection equally in a second embodiment, i.e. the first power module 100-1 to the N power module 100-N, and wherein N is more than or equal to 2.The difference of the second embodiment and the first embodiment is, in each power module, is provided with switch drive module.In the present embodiment, need to choose any one power module as main power source module, and in Switching Power Supply other all power modules as from power module.Here owing to comprising at least two power modules in Switching Power Supply, so in Switching Power Supply, there is at least one from power module.Correspondingly, described switch drive module comprises the main switch driver module of being located at from power module, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to.
For example, the first power module 100-1 of take is main power source module, and second source module 100-2 to the N power module 100-N is for to describe from power module.Correspondingly, the switch drive module 1 arranging in the first power module 100-1 be main switch driver module, in second source module 100-2 to the N power module 100-N respectively the switch drive module 2 of setting to switch drive module N be from switch drive module.
Referring to Fig. 4, is the module diagram of main switch driver module in parallel connection jitter frequency Switching Power Supply the second embodiment provided by the invention.As shown in Figure 4, described main switch driver module is the master switch driver module that switch drive module 1 is equivalent to the first embodiment in Fig. 2, also comprise data acquisition unit 310, frequency allocation units 320 and signal output unit 330, difference be the function of signal output unit 330 of main switch driver module and the signal output unit 230 of master switch driver module slightly different, and main switch driver module also comprises data output unit 340.
Wherein, data acquisition unit 310 is identical with data acquisition unit 210 functions of master switch driver module, quantity information and address information at least two power modules described in collection when described Switching Power Supply powers on, obtain the quantity N of the first power module 100-1 to the N power module 100-N in parallel in Switching Power Supply, and address information separately.
Therefore, in a second embodiment, switch drive module 1, switch drive module 2 ... switch drive module N is by controlling the mode from switch drive pattern with main switch driver module, make the switching frequency of the switching drive signal that sends separately neither identical, also the humorous wave interference that makes the corresponding power module receiving produce is dispersed in certain limit, thereby has reduced harmonic wave interfering energy.
In order to disperse further humorous wave interference, the present invention gives a kind of preferably frequency allocation plan.By frequency allocation units, according to described quantity information, according to certain rule, be that described at least two power modules distribute corresponding switching frequency.If N is the number of the power module that obtains in described quantity information, f
1for the switching frequency of the first default power module 100-1, and preset switches frequency-splitting Δ f
i(Δ f
ican be changeless, also can change to some extent along with the difference of power module).Get variable i=1,2 simultaneously ... N.The following formula of frequency allocation units utilization calculates the switching frequency of i power module 100-i:
f
i＝f
1+(i-1)×Δf
i； (1)
And the switching frequency of the switching drive signal of N power module 200-N is:
f
N＝f
1+(N-1)×Δf
i。(2)
In above-mentioned formula, f
1with Δ f
ivalue depend primarily on EMC effect and the stability of module own.For example, tolerable temperature of hardware etc.If both ratio is too little, switching frequency shake is too little, and the stranding yupin effect of noise is not obvious; If both ratios are too large, switching frequency shake is too large, and module is likely influenced in job insecurity or performance.Therefore, above-mentioned f
1with Δ f
ivalue need to meet and make the switching frequency of each power module in Switching Power Supply be less than its limiting frequency value.In the present invention, according to above-mentioned relation and influencing factor thereof, Δ f
iwith f
1the scope of ratio be 3% to 20%, preferably 5% to 10%.
It should be noted that, although provided a kind of concrete formula in the application, the distribution of switching frequency is illustrated, what application was understood is that those skilled in the art can carry out conversion arbitrarily to realize rational frequency distribution to above-mentioned formula.For example above-mentioned formula (1) and (2) also can adopt respectively following formula (3) and (4) to represent, are consequently equal to.
f
i＝f
1-(i-1)×Δf
i (3)
f
N＝f
1-(N-1)×Δf
i (4)
Further, the frequency allocation units result that a series of above-mentioned computational process obtains that prestores, forming frequency corresponding lists.For example in frequency corresponding lists, quantity N is that 2 correspondences the frequency f that two above-mentioned formula of process calculate
1and f
2for distributing to the first power module 100-1 and second source module 100-2; Quantity N is that 3 correspondences the frequency f that three above-mentioned formula of process calculate
1, f
2and f
3, for distributing to the first power module 100-1, second source module 100-2 and the 3rd power module 100-3.Therefore, frequency allocation units only need can inquire by said frequencies corresponding lists the switching frequency that each power module is corresponding after obtaining quantity information.
Further, above-mentioned switching frequency can sequentially be arranged in order and distribute according to the bar code of power module, for example, according to bar code order, be respectively the first power module 100-1, second source module 100-2 ... N power module 100-N provide the switching frequency increasing progressively successively.Thereby make each power module on locus, distribute to such an extent that distribution more reasonable, its frequency is also more orderly.
Referring to Fig. 5, is the schematic diagram of parallel connection jitter frequency Switching Power Supply the 3rd embodiment provided by the invention.As shown in Figure 5, the 3rd embodiment is identical with the general structure of the first embodiment in Fig. 1, also adopt master switch driver module 200 control described at least two power modules, difference be only, each in described at least two power modules further comprises at least one power supply submodule.For example, the first power module 100-1, second source module 100-2 ... N power module 100-N comprises respectively M
1, M
2m
nindividual power supply submodule.The unit of described master switch driver module 200 form with annexation also with Fig. 2 in identical, difference is only, the function of unit realization is slightly different:
Wherein, quantity information and the address information of all power supply submodules of at least two power modules described in described data acquisition unit 210 gathers when described Switching Power Supply powers on, obtain the quantity M=M of all power supply submodules of the first power module 100-1 to the N power module 100-N in Switching Power Supply
1+ M
2+ ... M
n, and the address information of each power supply submodule.
The mutual unequal switching frequency of the corresponding distribution of all power supply submodules that frequency allocation units 220 are described at least two power modules according to described quantity information M, is respectively the power supply submodule 1 of the first power module 100-1 to power supply submodule M
1..., the power supply submodule 1 of N power module 100-N is to power supply submodule M
ndistribute a switching frequency.For example, be power supply submodule 1 distribution the first switching frequency f of the first power module 100-1
1, be that the power supply submodule 2 of the first power module 100-1 distributes second switch frequency f
2by that analogy, be the power supply submodule M of N power module 100-N
ndistribute M switching frequency f
m; And the first switching frequency f
1to N switching frequency f
munequal mutually.At these frequency allocation units 220, can adopt equally that in above-mentioned formula (1) to (4), any one calculates M switching frequency, or find out M switching frequency according to frequency corresponding lists, correspondence is distributed to each power supply submodule.
Signal output unit 230 is exported respectively corresponding switching drive signal to the power supply submodule of described at least two power modules according to described switching frequency and address information, generate respectively the first switching drive signal to the N switching drive signal, and utilize the address information of each power supply submodule in the first power module 100-1 to the N power module 100-N that data acquisition unit 210 obtains, these switching drive signal correspondences are sent to each power module.For example, generate and there is the first switching frequency f
1the first switching drive signal, and utilize the address information of the power supply submodule 1 of the first power module 100-1 this first switching drive signal to be sent to the power supply submodule 1 of the first power module 100-1.Similarly, generate and there is second switch frequency f
2second switch drive signal, and utilize the address information of the power supply submodule 2 of the first power module 100-1 to drive signal to send to the power supply submodule 2 of the first power module 100-1 this second switch.Until drive the power supply submodule work of all the first power module 100-1 to the N power module 100-N.Because the power supply submodule 1 of the first power module 100-1 is to M
1, second source module 100-2 power supply submodule 1 to M
2the power supply submodule 1 of N power module 100-N is to M
nthe switching frequency of the switching drive signal receiving is neither identical, and the humorous wave interference that each power supply submodule is produced is dispersed in certain limit, thereby has reduced harmonic wave interfering energy.
Referring to Fig. 6, is the schematic diagram of parallel connection jitter frequency Switching Power Supply the 4th embodiment provided by the invention.As shown in Figure 6, the 4th embodiment is identical with the general structure of the second embodiment in Fig. 3, also in each power module, is provided with switch drive module, distinguishes and is only, each in described at least two power modules comprises at least one power supply submodule.For example, the first power module 100-1, second source module 100-2 ... N power module 100-N comprises respectively M
1, M
2m
nindividual power supply submodule.The unit of described master switch driver module form with annexation also with Fig. 4 in identical, difference is only, the function of unit realization is slightly different:
Wherein, data acquisition unit 310 is for the quantity information of all power supply submodules of at least two power modules described in collection when described Switching Power Supply powers on, and the address information of described at least two power modules, obtain the quantity M=M of all power supply submodules of the first power module 100-1 to the N power module 100-N in Switching Power Supply
1+ M
2+ ... M
n, and the address information of the first power module 100-1 to the N power module.
In the 4th embodiment, from switch drive module, obtain the address information of corresponding power supply submodule, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.For example, switch drive module 2 is obtained in second source module 100-2 power supply submodule 1 to M
2address information, and generate and to there is M
1+ 1 switching frequency f
m1+1m
1+ 1 switching drive signal driving power submodule 1 ... generation has M
1+ M
2switching frequency f
m1+M2m
1+ M
2switching drive signal driving power submodule M.Similarly, the power supply submodule in each switch drive module affiliated power module as self-driven in each switch drive module 2.
Because the power supply submodule 1 of the first power module 100-1 is to M
1, second source module 100-2 power supply submodule 1 to M
2the power supply submodule 1 of N power module 100-N is to M
nthe switching frequency of the switching drive signal receiving is neither identical, and the humorous wave interference that each power supply submodule is produced is dispersed in certain limit, thereby has reduced harmonic wave interfering energy.
Therefore, implementation principle of the present invention is, for providing switching frequency, fixes and mutual unequal switching drive signal each power module, if also contain power supply submodule in power module, adopt equally switching frequency to fix and mutual unequal switching drive signal drives each power supply submodule, can effectively disperse humorous wave interference like this.It should be noted that, the present invention can also adopt various ways to realize.For example, if increase new parallel electric source module on the basis of the Switching Power Supply that adopts above-mentioned switching frequency distribution method to control, can automatically regulate the switching frequency between each power module or each power supply submodule with reference to above-mentioned rule, only need to meet mentioned above principle.The present invention is the corresponding a kind of parallel connection jitter frequency method that Switching Power Supply is provided also, and at least two power-supply systems that also power module forms by switch drive module and electric parallel connection, the method comprises the following steps:
First in step S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
In step S2, described in each, power module receives respectively switching drive signal the work with different switching frequencies subsequently.
According to above-mentioned four kinds of different structures of this power-supply system, method provided by the invention is described below.
In first embodiment of the invention, as shown in Figure 1, described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously.Described step S1 further comprises the following steps that order is carried out:
First in steps A 1, quantity information and the address information of at least two power modules described in being gathered when described Switching Power Supply powers on by master switch driver module;
In steps A 2, by master switch driver module, according to described quantity information, be the mutual unequal switching frequency of the corresponding distribution of described at least two power modules subsequently;
Finally, in steps A 3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to described at least two power modules.
In second embodiment of the invention, as shown in Figure 3, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to.Described step S1 further comprises: first, in step B1, described in being gathered when described Switching Power Supply powers on by main switch driver module, quantity information and the address information of at least two power modules, go to step B2 subsequently;
In step B2, by main switch driver module, according to described quantity information, be corresponding mutual unequal switching frequency, subsequently executed in parallel step B3 and the step B4 of distributing of described at least two power modules subsequently;
In step B3, by main switch driver module, according to switching frequency corresponding to described main power source module and address information generation switching drive signal, drive described main power source module;
In step B4, by main switch driver module according to described address information by described at least one from switching frequency corresponding to power module, send to respectively correspondingly to switch drive module, by described at least one switching frequency receiving according to correspondence from switch drive module, generate switching drive signal and drive corresponding to power module.
In third embodiment of the invention, as shown in Figure 5, described switch drive module is the master switch driver module being simultaneously electrically connected to described at least two power modules, and each in described at least two power modules comprises at least one power supply submodule.Described step S1 further comprises the following steps that order is carried out:
First in step C1, quantity information and the address information of all power supply submodules of at least two power modules described in being gathered when described Switching Power Supply powers on by master switch driver module;
In step C2, all power supply submodules correspondences that are described at least two power modules according to described quantity information by master switch driver module are distributed mutual unequal switching frequency subsequently;
In step C3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to the power supply submodule of described at least two power modules subsequently.
In fourth embodiment of the invention, as shown in Figure 6, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to; And each in described at least two power modules comprises at least one power supply submodule.Described step S1 further comprises:
First in step D1, the quantity information of all power supply submodules of at least two power modules described in being gathered when described Switching Power Supply powers on by main switch driver module, and the address information of described at least two power modules, go to step D2 subsequently;
In step D2, all power supply submodules correspondences that are described at least two power modules according to described quantity information by main switch driver module are distributed mutual unequal switching frequency, subsequently executed in parallel step D3 and step D4 subsequently;
In step D3, by main switch driver module, obtained the address information corresponding to power supply submodule of described main power source module, and generate switching drive signal to drive the power supply submodule of described main power source module according to switching frequency corresponding to the power supply submodule of described main power source module and address information;
In step D4, by main switch driver module according to described at least one from address information corresponding to power module, by described at least one from switching frequency corresponding to the power supply submodule of power module, send to respectively corresponding to switch drive module, by the described address information of obtaining corresponding power supply submodule from switch drive module, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.
In preferred embodiment of the present invention, in steps A 2 or B2, also can utilize formula (1) at least two switching frequencies corresponding to power module difference described in formula (4) calculating.F
1with Δ f
ivalue depend on equally EMC effect and the stability of module own, Δ f
iwith f
1the scope of ratio be 3% to 20%, preferably 5% to 10%.
The frequency corresponding lists that also can prestore by inquiry in steps A 2 or B2 further, is obtained each frequency corresponding to power module quantity.
Further, in steps A 2 or B2, also can go out switching frequency f corresponding to i block power supply module by the bar code order permutation calculation of power module
i.
In addition, in method step C2 provided by the invention and D2, also can apply frequency corresponding to power supply submodule that the corresponding table of above-mentioned formula or frequency calculates or searches each power module.
Referring to Fig. 7, is harmonic wave interference profile schematic diagram in parallel connection jitter frequency Switching Power Supply provided by the invention.As shown in Figure 7, because the present invention sets and fixes and mutual unequal switching frequency for each power module, or be further that power supply submodule in power module is set fixing and mutual unequal switching frequency (not shown), the humorous wave interference that each power module and power supply submodule are produced scatter, thereby reduced harmonic wave interfering energy, solved the EMI problem of whole switch power supply system.The present invention can also respective design meet above-mentioned f
1to f
nbandwidth range in filter, further filtering electromagnetic interference.In addition, compare with the method for traditional inhibition EMI, parallel connection jitter frequency technology provided by the invention adopts power semiconductor integrated chip internal circuit to improve EMI, can consider with the little filter of volume, and can save the cost of peripheral component, do not rely on designer's experience, the reliability of system is provided.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the scope of the invention, can carry out various variations and be equal to replacement.In addition,, for adapting to specific occasion or the material of the technology of the present invention, can carry out many modifications and not depart from its protection range the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises all embodiment that drop into claim protection range.
Claims (18)
1. a parallel connection jitter frequency Switching Power Supply, comprises and it is characterized in that at least two power modules of switch drive module and electric parallel connection:
Described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and described master switch driver module further comprises:
Data acquisition unit, for quantity information and the address information of at least two power modules described in collection when described Switching Power Supply powers on;
Frequency allocation units, for according to described quantity information being the mutual unequal switching frequency of the corresponding distribution of described at least two power modules;
Signal output unit, for exporting respectively corresponding switching drive signal to described at least two power modules according to described switching frequency and address information.
2. parallel connection jitter frequency Switching Power Supply according to claim 1, is characterized in that, at least two switching frequencies corresponding to power module difference described in described frequency allocation units calculate according to the following formula of described quantity information utilization:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
3. parallel connection jitter frequency Switching Power Supply according to claim 2, is characterized in that, described frequency allocation units go out switching frequency f corresponding to i block power supply module by the bar code order permutation calculation of power module
i.
4. a parallel connection jitter frequency Switching Power Supply, comprises and it is characterized in that at least two power modules of switch drive module and electric parallel connection:
Described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to;
Described main switch driver module comprises:
Data acquisition unit, for quantity information and the address information of at least two power modules described in collection when described Switching Power Supply powers on;
Frequency allocation units, for according to described quantity information being the mutual unequal switching frequency of the corresponding distribution of described at least two power modules;
Signal output unit, for driving described main power source module according to switching frequency corresponding to described main power source module and address information generation switching drive signal;
Data output unit, for according to described address information by described at least one from switching frequency corresponding to power module, send to respectively corresponding to switch drive module.
5. parallel connection jitter frequency Switching Power Supply according to claim 4, is characterized in that, described at least one switching frequency receiving according to correspondence from switch drive module generates switching drive signal and drives corresponding to power module.
6. parallel connection jitter frequency Switching Power Supply according to claim 4, is characterized in that, at least two switching frequencies corresponding to power module difference described in described frequency allocation units calculate according to the following formula of described quantity information utilization:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
7. parallel connection jitter frequency Switching Power Supply according to claim 6, is characterized in that, described frequency allocation units go out switching frequency f corresponding to i block power supply module by the bar code order permutation calculation of power module
i.
8. a parallel connection jitter frequency Switching Power Supply, comprises and it is characterized in that at least two power modules of switch drive module and electric parallel connection:
Described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Each in described at least two power modules comprises at least one power supply submodule; Described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and described master switch driver module comprises:
Data acquisition unit, for quantity information and the address information of all power supply submodules of at least two power modules described in gathering when described Switching Power Supply powers on;
Frequency allocation units, for the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information;
Signal output unit, for exporting respectively corresponding switching drive signal to the power supply submodule of described at least two power modules according to described switching frequency and address information.
9. a parallel connection jitter frequency Switching Power Supply, comprises and it is characterized in that at least two power modules of switch drive module and electric parallel connection:
Described switch drive module send that at least two switching drive signals are corresponding and drive described at least two power modules, the switching frequency of described at least two switching drive signals is fixed, and the switching frequency of described at least two switching drive signals is unequal;
Described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to;
Each in described at least two power modules comprises at least one power supply submodule; And described main switch driver module comprises:
Data acquisition unit, for the quantity information of all power supply submodules of at least two power modules described in gathering when described Switching Power Supply powers on, and the address information of described at least two power modules;
Frequency allocation units, for the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information;
Signal output unit, for obtaining the address information corresponding to power supply submodule of described main power source module, and generate switching drive signal to drive the power supply submodule of described main power source module according to switching frequency corresponding to the power supply submodule of described main power source module and address information;
Data output unit, for according to described at least one from address information corresponding to power module, by described at least one from switching frequency corresponding to the power supply submodule of power module, send to respectively corresponding to switch drive module.
10. parallel connection jitter frequency Switching Power Supply according to claim 9, is characterized in that, the described address information of obtaining corresponding power supply submodule from switch drive module, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.
The parallel connection jitter frequency method of 11. 1 kinds of Switching Power Supplies, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, is characterized in that, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, when described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, described step S1 further comprises the following steps that order is carried out:
A1, by master switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of at least two power modules;
A2, by master switch driver module, according to described quantity information, to be that described at least two power modules are corresponding distribute mutual unequal switching frequency;
A3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to described at least two power modules.
12. parallel connection jitter frequency methods according to claim 11, is characterized in that, at least two switching frequencies corresponding to power module difference described in the following formula calculating of utilization in described steps A 2:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
13. parallel connection jitter frequency methods according to claim 12, is characterized in that, the bar code order permutation calculation by power module in described steps A 2 goes out switching frequency f corresponding to i block power supply module
i.
The parallel connection jitter frequency method of 14. 1 kinds of Switching Power Supplies, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, is characterized in that, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to; Described step S1 further comprises:
B1, by main switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of at least two power modules, go to step subsequently B2;
B2, by main switch driver module, according to described quantity information, be corresponding mutual unequal switching frequency, subsequently executed in parallel step B3 and the step B4 of distributing of described at least two power modules;
B3, by main switch driver module, according to switching frequency corresponding to described main power source module and address information, generate switching drive signal and drive described main power source module;
B4, by main switch driver module according to described address information by described at least one from switching frequency corresponding to power module, send to respectively correspondingly to switch drive module, by described at least one switching frequency receiving according to correspondence from switch drive module, generate switching drive signal and drive corresponding to power module.
15. parallel connection jitter frequency methods according to claim 14, is characterized in that, at least two switching frequencies corresponding to power module difference described in the following formula calculating of utilization in described step B2:
f
i＝f
1+(i-1)×Δf
i；
Wherein, i=1,2 ... N, N is the number of the power module that obtains in described quantity information, f
1with Δ f
ifor preset value, and Δ f
iwith f
1the scope of ratio be 3% to 20%.
16. parallel connection jitter frequency methods according to claim 15, is characterized in that, the bar code order permutation calculation by power module in described step B2 goes out switching frequency f corresponding to i block power supply module
i.
The parallel connection jitter frequency method of 17. 1 kinds of Switching Power Supplies, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, is characterized in that, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, when described switch drive module is the master switch driver module being electrically connected to described at least two power modules simultaneously, and when each in described at least two power modules comprises at least one power supply submodule, described step S1 further comprises the following steps that order is carried out:
C1, by master switch driver module, when described Switching Power Supply powers on, gathered described in quantity information and the address information of all power supply submodules of at least two power modules;
C2, the mutual unequal switching frequency of the corresponding distribution of all power supply submodules that is described at least two power modules according to described quantity information by master switch driver module;
C3, by master switch driver module, according to described switching frequency and address information, export respectively corresponding switching drive signal to the power supply submodule of described at least two power modules.
The parallel connection jitter frequency method of 18. 1 kinds of Switching Power Supplies, the power-supply system forming at least two power modules by switch drive module and electric parallel connection, is characterized in that, said method comprising the steps of:
S1, by described switch drive module, send at least two frequencies and fix and mutual unequal switching drive signal;
S2: described in each, power module receives respectively switching drive signal the work with different switching frequencies;
Wherein, described at least two power modules comprise a main power source module and at least one is from power module, described switch drive module comprises that correspondence is located at the main switch driver module in described main power source module respectively, and be respectively equipped with described at least one from least one in power module from switch drive module, and described main switch driver module simultaneously with described at least one from switch drive module, be electrically connected to; And each in described at least two power modules comprises at least one power supply submodule; Described step S1 further comprises:
D1, by main switch driver module, when described Switching Power Supply powers on, gathered described in the quantity information of all power supply submodules of at least two power modules, and the address information of described at least two power modules, goes to step D2 subsequently;
D2, corresponding mutual unequal switching frequency, subsequently executed in parallel step D3 and the step D4 of distributing of all power supply submodules that are described at least two power modules according to described quantity information by main switch driver module;
D3, by main switch driver module, obtained the address information corresponding to power supply submodule of described main power source module, and generate switching drive signal to drive the power supply submodule of described main power source module according to switching frequency corresponding to the power supply submodule of described main power source module and address information;
D4, by main switch driver module according to described at least one from address information corresponding to power module, by described at least one from switching frequency corresponding to the power supply submodule of power module, send to respectively corresponding to switch drive module, by the described address information of obtaining corresponding power supply submodule from switch drive module, and generate switching drive signal to drive corresponding power supply submodule according to the switching frequency receiving.
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Address after: No. 1510, Kansas Avenue, lureen, Ohio, USA Patentee after: Walteff energy systems company Address before: The United States of Ohio city F Lorain Street No. 1122 Patentee before: Emerson Network Power Co., Ltd. |
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