CN102324838A - Current-sharing power supply voltage adjusting method and device as well as network equipment - Google Patents
Current-sharing power supply voltage adjusting method and device as well as network equipment Download PDFInfo
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Abstract
The invention provides a current-sharing power supply voltage adjusting method and device as well as network equipment. The method comprises the following steps of: acquiring an adjustable voltage threshold according to the rated voltages of a plurality of current-sharing power supplies of same types and adjustable percentages of the voltages; and respectively adjusting the output voltage of each current-sharing power supply every time based on the condition that the adjusting voltage is smaller than or equal to the adjustable voltage threshold according to the current voltages corresponding to the plurality of current-sharing power supplies until the output voltage of each current-sharing power supply is adjusted to a target voltage. When the output voltage of each current-sharing power supply is adjusted by adopting the technical scheme of the invention, each current-sharing power supply can meet the current-sharing requirement in the adjusting process, and various defects in the prior art are solved.
Description
Technical field
The present invention relates to power electronic technology, relate in particular to a kind of current-sharing power supply voltage adjusting method, device and the network equipment.
Background technology
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that the control switch transistor turns on and off is kept a kind of power supply of regulated output voltage, and Switching Power Supply is generally by pulse width modulation (Pulse Width Modulation; Abbreviate as: PWM) control integrated circuit (IntegratedCircuit; Abbreviate as: IC) and FET (MOSFET) constitute.Common Switching Power Supply has electric main is converted to the alternating-current switch power supply of low-voltage direct, HVDC converted to the direct current modular power source of low-voltage direct.
Along with the development and the innovation of power electronic technology, switch power technology is also constantly developing and is innovating, so the rearrangeable switch power supply occurred.So-called rearrangeable switch power supply is meant the power supply that output voltage can be regulated within the specific limits, for example can be transferred to 53.5V by 48 volts (V), perhaps is transferred to 48V by 53.5V.In order to regulate the output voltage of power supply more easily; Communication chip and singlechip chip on power supply, have been increased; Be used to gather the various states of power supply; For example information such as output voltage, output current, current operating temperature and be uploaded to host computer is regulated host computer as required to the output voltage of power supply.
In practical application, common single power supply can't satisfy power demands, therefore, need a plurality of power supplys be carried out parallel connection, gives power receiving equipment (being load) power supply jointly.When supplying power to power receiving equipment by a plurality of power supply parallel connections, need these power supplys on average to share the required electric current of power receiving equipment, promptly require to realize current-sharing between each power supply.The mode that realizes the power supply current-sharing at present mainly is between each power supply, current equalizing bus bar to be set, and detects other power source voltage by current equalizing bus bar; When current equalizing bus bar detects other power source voltage and is higher than the busbar voltage of self, know that the load that other power supplys carry is bigger, so this power supply adds the PWM duty ratio of large power supply through its feedback control loop, to heighten its output voltage; When current equalizing bus bar detects other power source voltage and is lower than the busbar voltage of self, know that the load of himself carrying is bigger, then reduce the PWM duty ratio of power supply, to reduce its output voltage through its feedback control loop.Parallel connection is used and is called as current-sharing power supply through the power supply that current equalizing bus bar carries out current-sharing.
In the time need regulating to the output voltage of current-sharing power supply; Prior art is after earlier the output voltage of a power supply being regulated completion; The output voltage of next power supply is regulated, all current-sharing power supplies that promptly parallel connection used are regulated one by one, the inconsistent pilot process of different electrical power output voltage in this adjustment process, can occur again; If it is bigger that output voltage differs; The electric current of each power supply output will be unbalance, and therefore some power supply may close output, and then possibly cause whole system to make the pressure regulation operation failure because of power down.As shown in Figure 1, power supply 11 gives load 13 power supplies with power supply 12 parallelly connected uses, and the protective circuit of power supply 11 is made up of diode D1 and diode D2, and the protective circuit of power supply 12 is made up of diode D3 and diode D4.In the time need regulating to the output voltage of power supply shown in Figure 1; Host computer is adjusted to 53.5V with the output voltage of power supply 11 by 48V earlier; Power supply output state in that the output voltage with power supply 12 is adjusted to before the 53.5V is as shown in Figure 1, and this moment is because diode D3 and diode D4 reverse by acting in the protective circuit of power supply 12, and power supply 12 can't power output; Load 13 this moment will be born alone by power supply 11; If the required power of load 13 has surpassed the peak power output of power supply 11, then the overpower phenomenon will appear, and make power supply 11 entering overcurrent protection patterns and close output.When voltage dropped to 48V, power supply 12 began power supply, and at this moment, load 13 will be born alone by power supply 12, in like manner also can cause power supply 12 to close output, and finally cause the whole system power down, make this pressure regulation operation failure.
In order to address the above problem; The required power of prior art restriction load can not surpass the peak power output of single power supply, and still, this mode can increase system cost; Reduce the compatibility of power supply; Therefore, how under the condition that the load power demand is not limited, it is that problem to be solved is arranged that the output voltage to current-sharing power supply of success is regulated.
Summary of the invention
The present invention provides a kind of current-sharing power supply voltage adjusting method, device and the network equipment, in order under the condition that the load power demand is not limited, realizes the adjusting to the output voltage of current-sharing power supply, reduces the compatibility of system cost, raising current-sharing power supply.
The present invention provides a kind of current-sharing power supply voltage adjusting method, comprising:
Rated voltage and the adjustable percentage of voltage according to a plurality of same model current-sharing power supplies obtain the adjustable voltage thresholding;
According to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage.
The present invention provides a kind of current-sharing power supply voltage regulating device, comprising:
Acquisition module is used for rated voltage and the adjustable percentage of voltage according to a plurality of same model current-sharing power supplies, obtains the adjustable voltage thresholding;
Adjustment module; Be used for according to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage.
The present invention provides a kind of network equipment, comprises arbitrary current-sharing power supply voltage regulating device provided by the invention.
Current-sharing power supply voltage adjusting method of the present invention, device and the network equipment; Rated voltage and the adjustable percentage of voltage according to current-sharing power supply; Obtain the adjustable voltage thresholding; According to the regulation voltage that is less than or equal to the adjustable voltage thresholding output voltage of a plurality of current-sharing power supplies is repeatedly regulated then, made the electric current of a plurality of current-sharing power supply outputs in each adjustment process satisfy the requirement of current-sharing, solved prior art because of the problem that current unbalance causes some power-off output in the pressure regulation process, occurring; The system that makes needn't limit the load power demand; Can reach the purpose of the output voltage of regulating current-sharing power supply, reduce the cost of system, improve the compatibility of current-sharing power supply.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 carries out the pilot process view of voltage-regulation to current-sharing power supply for prior art;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 2 provides for the embodiment of the invention one;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 3 provides for the embodiment of the invention two;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 4 provides for the embodiment of the invention three;
The structural representation of the current-sharing power supply voltage regulating device that Fig. 5 provides for the embodiment of the invention four;
Fig. 6 A is a kind of structural representation of the current-sharing power supply voltage regulating device that provides of the embodiment of the invention five;
Fig. 6 B is another structural representation of the current-sharing power supply voltage regulating device that provides of the embodiment of the invention five.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 2 provides for the embodiment of the invention one.As shown in Figure 2, the method for present embodiment comprises:
Step 201, according to the rated voltage and the adjustable percentage of voltage of a plurality of same model current-sharing power supplies, obtain the adjustable voltage thresholding.
In the present embodiment, use powering load by a plurality of same model power supply parallel connections, the power supply that these same model parallel connections are used all is called as current-sharing power supply.Be provided with current equalizing bus bar between a plurality of current-sharing power supplies, be used to make a plurality of current-sharing power supplies to realize current-sharing.Each current-sharing power supply comprises following parameter: rated voltage, rated current, the unbalanced degree of current-sharing and the adjustable percentage of voltage etc., after current-sharing power supply was confirmed, above-mentioned parameter had just confirmed that also promptly the above-mentioned parameter of current-sharing power supply is known for host computer.
When a plurality of current-sharing power supply parallel connections were used, the electric current of current-sharing power supply output can not be identical, promptly allows the electric current of each current-sharing power supply output to have the certain precision error, and this trueness error is referred to as the unbalanced degree thresholding of current-sharing.The unbalanced degree of current-sharing that calculates as if the actual output current according to current-sharing power supply is not more than the unbalanced degree thresholding of (promptly being less than or equal to) above-mentioned current-sharing, just thinks that each current-sharing power supply satisfies the unbalanced degree requirement of current-sharing, notes by abridging to satisfying the current-sharing requirement.Wherein, the rated current of the unbalanced degree of current-sharing=(average output current of the actual output current-current-sharing power supply of current-sharing power supply)/current-sharing power supply.The adjustable percentage of voltage is meant when the corresponding unbalanced degree of current-sharing of current-sharing power supply equals the unbalanced degree thresholding of current-sharing, and the voltage difference between two current-sharing power supplies accounts for the percentage of rated voltage.Wherein, the adjustable percentage of voltage is in the process of designing power supply, is benchmark with the unbalanced degree of current-sharing; Examined fully that the factors such as precision difference of various devices calculate; Therefore, in case power supply has confirmed that the adjustable percentage of voltage that this power supply is corresponding has also just been confirmed.Usually, adjustable voltage percentage is between 0.5%-1%.
Concrete, host computer multiplies each other the rated voltage and the adjustable percentage of voltage of current-sharing power supply, with product as the adjustable voltage thresholding.That is to say; When the voltage difference between two current-sharing power supplies was not more than (promptly being less than or equal to) adjustable voltage thresholding, these two current-sharing power supplies satisfied the unbalanced degree requirement of current-sharing (the unbalanced degree of current-sharing that promptly calculates according to the actual output current of these two current-sharing power supplies all is not more than the unbalanced degree thresholding of current-sharing) respectively.
Step 202, the current voltage corresponding according to a plurality of current-sharing power supplies; The condition that at every turn is less than or equal to the adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each current-sharing power supply respectively, till the output voltage with each current-sharing power supply is adjusted to target voltage.
In the present embodiment, current voltage is meant the voltage of each current-sharing power supply output before each the adjusting, and this moment, the voltage of each current-sharing power supply output was identical.Before host computer carried out a plurality of current-sharing power supplies regulating the first time, current voltage was exactly the initial voltage that need regulate each current-sharing power supply.In addition, the corresponding target voltage of pre-set each current-sharing power supply on host computer, the current voltage that each current-sharing power supply is corresponding before regulating and the difference of target voltage are the voltage range that host computer need be regulated each current-sharing power supply.
In the present embodiment; Host computer is regulated the output voltage of a plurality of current-sharing power supplies respectively with the regulation voltage that is not more than (promptly being less than or equal to) adjustable voltage thresholding at every turn; The voltage range of regulating is as required regulated through one or many, and the output voltage of each current-sharing power supply is adjusted to target voltage.Wherein, said " adjusting " can increase the output voltage of current-sharing power supply, also can be the output voltage that reduces current-sharing power supply.
The current-sharing power supply voltage adjusting method of present embodiment; Host computer is according to the rated voltage of the current-sharing power supply adjustable voltage percentage when satisfying the unbalanced degree of current-sharing and require; Adjustable voltage thresholding when obtaining each current-sharing power supply and satisfying the current-sharing requirement; And the regulation voltage during with each regulate is not more than (being less than or equal to) adjustable voltage thresholding and respectively the output voltage of a plurality of current-sharing power supplies regulates; And the output voltage of each current-sharing power supply is adjusted to target voltage the most at last, in each adjustment process, has guaranteed to satisfy the current-sharing requirement between each current-sharing power supply, has solved because of the unbalance problem that causes some current-sharing power supply to close output of each current-sharing power supply output current; And then solved and close output because of the part current-sharing power supply and make the whole system power down finally cause the problem of voltage-regulation failure; Make to limit the load power demand and can successfully realize adjusting, reduced the cost of system, improved the compatibility of current-sharing power supply the output voltage of each current-sharing power supply.
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 3 provides for the embodiment of the invention two.As shown in Figure 3, the method for present embodiment comprises:
This step can see the description of step 201 among the embodiment one for details, repeats no more at this.
Before the output voltage of each current-sharing power supply not being regulated, the current voltage that host computer obtains is the initial voltage need regulate each current-sharing power supply the time.The output voltage of each current-sharing power supply was V0 before present embodiment was established and regulated, and to establish target regulated voltage be V1.
Concrete, each current-sharing power supply is provided with communication chip and singlechip chip, and singlechip chip is gathered the state of current-sharing power supply in real time, information such as output voltage, output current and working temperature for example, and report host computer through communication chip.Host computer obtains the output voltage of each current-sharing power supply from the information that each current-sharing power supply reports.The output voltage of each current-sharing power supply is identical, is V0 this moment.
Concrete, host computer after obtaining the current voltage of each current-sharing power supply compares current voltage and target voltage, if target voltage greater than current voltage, then deducts current voltage with target voltage, obtains both differences; If target voltage less than current voltage, then deducts target voltage with current voltage, obtain both differences, promptly obtain the absolute value of the difference of target voltage and current voltage; Then, absolute value and the adjustable voltage thresholding with the difference of obtaining compares; If the absolute value of difference is greater than the adjustable voltage thresholding, explanation will be adjusted to target voltage with the output voltage of each current-sharing power supply, need be through repeatedly regulating; If the absolute value of the difference of obtaining is not more than (promptly being less than or equal to) adjustable voltage thresholding, explaining only needs can the output voltage of each current-sharing power supply be adjusted to target voltage through once regulating.
Step 304, the regulation voltage when the adjustable voltage thresholding is regulated as this are regulated the output voltage of each current-sharing power supply successively, and return and continue execution in step 302.
Wherein, Need be when knowing through repeatedly regulating when could the output voltage of each current-sharing power supply be adjusted to target voltage; When each current-sharing power supply satisfies the current-sharing requirement in guaranteeing each adjustment process; Regulation voltage when host computer is regulated as this with the adjustable voltage thresholding is so that regulate least number of times.Wherein, Regulation voltage with the adjustable voltage thresholding during as each the adjusting is a kind of preferred implementation; But be not limited to this, the regulation voltage when any magnitude of voltage less than the adjustable voltage thresholding all also can be used as this adjusting, regulating number of times simultaneously can be different because of the difference of regulation voltage.
Concrete, behind the regulation voltage when confirming that this is regulated, host computer is regulated control command according to the regulation voltage formation voltage, and this voltage-regulation control command is sent to the communication chip of current-sharing power supply, is transmitted to the singlechip chip of current-sharing power supply by communication chip.The singlechip chip of each current-sharing power supply is regulated PWM duty ratio separately through feedback control loop, to reach the purpose of regulating output voltage.
In the present embodiment, host computer is through sending to current-sharing power supply with the voltage-regulation control command, so that each current-sharing power supply is regulated one by one one by one.For example: suppose that adjustable threshold voltage (being the regulation voltage of this adjusting) is Δ V, then host computer is adjusted to V0+ Δ V with the output voltage of a current-sharing power supply by V0 earlier through the voltage-regulation control command; Output voltage with second current-sharing power supply is adjusted to V0+ Δ V then, after the output voltage with all current-sharing power supplies is adjusted to V0+ Δ V, has just accomplished this and has regulated operation.Regulate the output voltage of each current-sharing power supply of back through this, that is current voltage becomes V0+ Δ V.Wherein, if target voltage greater than current voltage, then Δ V is greater than 0, then after regulating through this, it is big that the output voltage of each current-sharing power supply becomes; If target voltage is less than current voltage, then Δ V is less than 0, and after then regulating through this, the output voltage of each current-sharing power supply diminishes.
Afterwards, host computer continues execution in step 302.Because the singlechip chip of each current-sharing power supply can be gathered the output voltage of current-sharing power supply in real time; And report host computer through communication chip; Therefore, this moment host computer again the current voltage that gets access to of execution in step 302 be through once regulating the output voltage of each current-sharing power supply of back, i.e. V0+ Δ V.After getting access to current voltage, continue execution in step 303, whether the absolute value of difference of promptly judging target voltage and current voltage is greater than the adjustable voltage thresholding; If judged result is for being; Continue execution in step 304; Regulation voltage when promptly preferably regulating as this with the adjustable voltage thresholding; Host computer continues to control successively the adjusting that each current-sharing power supply carries out output voltage, regulates the output voltage of each current-sharing power supply of back through this, that is host computer once more the current voltage that gets access to of execution in step 302 become V0+2 Δ V.
Afterwards, continue circulation and carry out above-mentioned steps 302-step 304, execution in step 305 was gone in commentaries on classics when the absolute value of judging the difference of target voltage and current voltage up to step 303 was not more than (promptly being less than or equal to) adjustable voltage thresholding.
When the absolute value of the difference of judging target voltage and current voltage during less than the adjustable voltage thresholding; Explanation is carried out once or is carried out once to regulate and operate and can the output voltage of each current-sharing power supply be adjusted to target voltage when guaranteeing that each current-sharing power supply satisfies the current-sharing requirement.
Therefore; Host computer is with the absolute value of the difference of target voltage and the current voltage regulation voltage as this adjusting; Because the absolute value of this difference is not more than (promptly being less than or equal to) adjustable voltage thresholding, so can guarantee that each current-sharing power supply satisfies the current-sharing requirement in this adjustment process; Then, host computer is regulated control command according to the absolute value formation voltage of this difference, and sends to each current-sharing power supply successively, makes each current-sharing power supply regulate PWM duty ratio separately according to control command through feedback control loop, so that output voltage is adjusted to target voltage.So far, the output voltage of each current-sharing voltage is target voltage V1.
Wherein, step 302-step 305 can be regarded a kind of embodiment of step 202 among the embodiment one as in the present embodiment.
In addition; In this explanation; In the primary voltage adjustment process, except adopting one by one regulative mode (mode of promptly successively each current-sharing power supply being regulated), host computer can also adopt the mode that all current-sharing power supplies are regulated simultaneously that each current-sharing power supply is carried out voltage-regulation; Be that host computer sends the voltage-regulation control command to all current-sharing power supplies simultaneously, each current-sharing power supply is regulated according to the voltage-regulation control command simultaneously.Moreover; Host computer can also adopt the mode of simultaneously the part current-sharing power supply being regulated that each current-sharing power supply is carried out voltage-regulation; Promptly in the primary voltage adjustment process, host computer is not to send the voltage-regulation control command to current-sharing power supply one by one, neither send the voltage-regulation control command to all current-sharing power supplies simultaneously; But send the voltage-regulation control command to a part of current-sharing power supply at every turn, till the output voltage of all current-sharing power supplies has all been regulated a Δ V.
The current-sharing power supply voltage adjusting method of present embodiment; Host computer is according to the rated voltage of the current-sharing power supply adjustable voltage percentage when satisfying the unbalanced degree of current-sharing and require; Adjustable voltage thresholding when obtaining each current-sharing power supply and satisfying the current-sharing requirement; And come successively the output voltage of a plurality of current-sharing power supplies to be regulated with the regulation voltage of adjustable voltage thresholding when repeatedly regulating; And the output voltage of each current-sharing power supply is adjusted to target voltage the most at last, in each adjustment process, has guaranteed to satisfy the current-sharing requirement between each current-sharing power supply, has solved because of the unbalance problem that causes some current-sharing power supply to close output of each current-sharing power supply output current; And then solved and close output because of the part current-sharing power supply and make the whole system power down finally cause the problem of voltage-regulation failure; Make to limit the load power demand and can successfully realize adjusting, reduced the cost of system, improved the compatibility of current-sharing power supply the output voltage of each current-sharing power supply.Simultaneously, in the present embodiment, host computer is the regulation voltage during as each adjusting with the adjustable voltage thresholding as far as possible, has reduced the adjusting number of times, has the advantage that economizes on resources.
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 4 provides for the embodiment of the invention three.As shown in Figure 4, the method for present embodiment comprises:
This step can see the description of step 201 among the embodiment one for details, repeats no more at this.
In the present embodiment; Before current voltage is meant and the output voltage of each current-sharing power supply is not regulated; The output voltage of each current-sharing power supply, promptly initial voltage specifically can report host computer by the singlechip chip collection that is provided with on each current-sharing power supply and through communication chip.
Present embodiment provides a kind of host computer to obtain and regulates number of times and each preferred implementation of regulating corresponding regulation voltage; Comprise: divided by the adjustable voltage thresholding, the merchant that will be divided by is as regulating frequency threshold value with the absolute value of the difference of target voltage and current voltage for host computer; Then, will be more than or equal to the integer of regulating frequency threshold value as regulating number of times, and confirm each corresponding regulation voltage of regulating according to the adjusting number of times of confirming.Wherein, confirm that each foundation of regulating corresponding regulation voltage is not more than the adjustable voltage thresholding for guaranteeing regulation voltage.For example: equal 15 if regulate frequency threshold value, then regulating number of times can be for 15 or greater than any integer of 15.If regulating frequency threshold value is 15.5, then regulating number of times can be for 16 or greater than any integer of 16.
Further; Present embodiment provides a kind of obtaining to regulate number of times and each preferred implementation of regulating corresponding adjustable voltage; Specifically comprise: host computer judges whether this adjusting frequency threshold value is integer, judges promptly whether the absolute value of difference can be divided exactly by the adjustable voltage thresholding; If judged result is for being, then explanation at every turn with the adjustable voltage thresholding as regulation voltage, just can pass through the output voltage that integer regulates each current-sharing power supply and be adjusted to target voltage; If judged result for not, explain with the adjustable voltage thresholding as regulation voltage, also need after regulating through integer again through once with to operate as the adjusting of regulation voltage less than the adjustable voltage thresholding.
Based on this; When judged result when being; Host computer is with the regulation voltage of adjustable voltage thresholding as each adjusting correspondence; The corresponding frequency threshold value of regulating is actual adjusting number of times, like this can each current-sharing power supply satisfies the current-sharing requirement in guaranteeing each adjustment process in, make the adjusting least number of times.When judged result for not the time; Host computer rounds processing to regulating frequency threshold value; Promptly get the integer part of regulating frequency threshold value, thereby obtain, then target voltage is deducted the product that current voltage deducts adjustable threshold voltage and this integer part again with the number of times of adjustable voltage thresholding as regulation voltage; Take absolute value afterwards; The result that will take absolute value then regulates corresponding regulation voltage as last, and with the adjustable voltage thresholding as repeatedly regulating corresponding regulation voltage before last the adjusting, then the adjusting number of times of reality is that the integer part of the adjusting frequency threshold value obtained adds 1 again.
For example: suppose that two current voltages are the current-sharing power supply of 48V, the adjustable percentage of the voltage of each current-sharing power supply is 1%, and rated voltage is 20V, and then can obtain the adjustable voltage thresholding by step 401 is 0.2V.The current-sharing degree of unbalance thresholding of supposing two current-sharing power supplies simultaneously is 5%, and rated current is 20A, the load of carrying 30A jointly, and being adjusted to target voltage 53.5V with the output voltage with two current-sharing power supplies by 48V is that example describes.
Relation according to adjustable voltage thresholding and the unbalanced degree thresholding of current-sharing can know that when the output voltage of two current-sharing power supplies differed 0.2V, the unbalanced degree of the output current of two current-sharing power supplies just reached 5%.Can know by following formula according to the definition of the unbalanced degree of current-sharing:
|I
1-15|/20＝5％ (1)
|I
2-15|/20＝5％ (2)
I
1+I
2＝30 (3)
And then calculate I
1=14A I
2=16A, or I
1=16A I
2=14A.
Concrete, 48V and 53.5V differ 5.5V, through calculating 5.5/0.2=27.5; Can know to regulate through 27.5 times at least and operate that through judging that finding the adjusting number of times not to be integer, then round numbers 27; Calculate 53.5-48-0.2 * 27=0.1 afterwards; Regulation voltage when being about to 0.1V as last the adjusting, and with 0.2V as before the regulation voltage repeatedly regulated, actual in 28 adjustings.
In this explanation, the regulation voltage of the above-mentioned adjusting number of times that obtains during with each the adjusting is not limited to this, and be all passable as long as the regulation voltage when satisfying each the adjusting is not more than the magnitude of voltage of (being less than or equal to) adjustable voltage thresholding.With the above-mentioned example that is exemplified as, be after 27.5 getting access to the minimal adjustment number of times, can all be set to 0.1V by the regulation voltage when at every turn regulating, then the practical adjustments number of times is 55 times; In addition; Also wherein the regulation voltage of several times adjusting is set to 0.1V; The regulation voltage of several times is set to 0.15V again, and the regulation voltage in the residual accommodation number of times is set to 0.2V, and this moment, corresponding adjusting number of times also can adaptability change; In addition other multiple set-up modes can also be arranged, do not enumerate one by one at this.
Step 404, successively the output voltage of each current-sharing power supply is regulated, and will be regulated number of times and subtract 1 according to the regulation voltage that obtains.
Concrete; After having obtained regulation voltage corresponding when regulating number of times with each the adjusting; Host computer is therefrom selected a regulation voltage; And, successively the voltage-regulation control command is sent to each current-sharing power supply with this regulation voltage formation voltage adjusting control command, make each current-sharing power supply accomplish adjusting to output voltage through feedback control loop control PWM duty ratio separately.After the voltage-regulation control command that all current-sharing power supplies all generate according to this regulation voltage was accomplished adjusting, this regulated EO.Simultaneously, host computer will be regulated number of times and subtract 1, judge whether to have accomplished the operation that the output voltage of each current-sharing power supply is adjusted to target voltage to regulate number of times through record.
Host computer judge to be regulated number of times and whether is equaled 0, equals 0 if regulate number of times, explains that the output voltage with each current-sharing power supply is adjusted to target voltage, and then execution in step 407; Be not equal to 0 if reconcile number of times, explain and also need proceed to regulate operation that promptly execution in step 406.
The each adjusting in the corresponding regulation voltage that the host computer continuation is obtained from step 403; Obtain and regulate corresponding regulation voltage next time; And continue execution in step 404, and promptly continue the output voltage of each current-sharing power supply to be regulated according to the regulation voltage that newly obtains, be 0 until regulating number of times.
Continuation describes with above-mentioned example, and the regulation voltage of this adjusting that host computer gets access to is 0.2V, and the output voltage with one of them current-sharing power supply is adjusted to 48.2V earlier.At this moment, can know that by above-mentioned formula (1), (2) and (3) the unbalanced degree of the current-sharing of two current-sharing power supplies reaches 5%, output voltage is that the output current of the current-sharing power supply of 48.2V is 16A, and the output current of another current-sharing power supply is 14A.Then; Host computer also is adjusted to 48.2V with the output voltage of another current-sharing power supply, and this moment, then the unbalanced degree of the current-sharing of two current-sharing power supplies was 0% because the output voltage of two current-sharing power supplies is identical; Promptly the output current of two current-sharing power supplies is respectively 50% of total current, promptly is 15A.
Through judge regulating number of times is not 0, and after needing to continue output voltage with a current-sharing power supply and being adjusted to 48.4V, the output voltage with another current-sharing power supply also is adjusted to 48.4V then.And the like, till the output voltage with two current-sharing power supplies is adjusted to 53.4V.
At this moment; Through judging that the demodulation number of times still is not 0; But need regulate increase 0.1V with the output voltage of a current-sharing power supply and be adjusted to 53.5V this moment, and can know that by above-mentioned formula (1), (2) and (3) the unbalanced degree of the current-sharing of two current-sharing power supplies reaches 2.5% this moment; Output voltage is that the output current of the current-sharing power supply of 53.5V is 15.5A, and the output current of another current-sharing power supply is 14.5A.Then; Host computer also is adjusted to 53.5V with the output voltage of another current-sharing power supply, and this moment, then the unbalanced degree of the current-sharing of two current-sharing power supplies was 0% because the output voltage of two current-sharing power supplies is identical; Promptly the output current of two current-sharing power supplies is respectively 50% of total current, promptly is 15A.
Wherein, above-mentioned steps 403-step 407 can be regarded a kind of embodiment of step 202 among the embodiment one as.
The current-sharing power supply voltage adjusting method of present embodiment; Host computer is according to the rated voltage of the current-sharing power supply adjustable voltage percentage when satisfying the unbalanced degree of current-sharing and require; Adjustable voltage thresholding when obtaining each current-sharing power supply and satisfying the current-sharing requirement; And come successively the output voltage of a plurality of current-sharing power supplies to be regulated with the regulation voltage of adjustable voltage thresholding when repeatedly regulating; And judge whether the output voltage of each current-sharing power supply is adjusted to target voltage through regulating number of times, in each adjustment process, guaranteed to satisfy the current-sharing requirement between each current-sharing power supply, solved because of the unbalance problem that causes some current-sharing power supply to close output of each current-sharing power supply output current; And then solved and close output because of the part current-sharing power supply and make the whole system power down finally cause the problem of voltage-regulation failure; Make to limit the load power demand and can successfully realize adjusting, reduced the cost of system, improved the compatibility of current-sharing power supply the output voltage of each current-sharing power supply.Simultaneously, in the present embodiment, host computer is the regulation voltage during as each adjusting with the adjustable voltage thresholding as far as possible, has reduced the adjusting number of times, has the advantage that economizes on resources.
In above-mentioned each embodiment, host computer can be connected with current-sharing power supply through modes such as RS485.
Above-mentioned each embodiment mainly is the voltage regulation function that utilizes the inner flow equalizing circuit self of current-sharing power supply, within the corresponding voltage adjustable extent of the adjustable percentage of voltage, carries out repeatedly pressure regulation among a small circle by the PC control current-sharing power supply, to reach the purpose of final pressure regulation.Above-mentioned each embodiment is in the process that the output voltage of the current-sharing power supply that adopts sequencing that two or more parallel connections are used is regulated; All the time let current-sharing power supply be in equal stream mode; Solve the different problem that can't current-sharing of current-sharing power supply output voltage in the pilot process that occurs when two or more current-sharing power supplies carry out pressure regulation successively in the prior art, and then solved the problem that consequent current-sharing power supply overload causes the main frame power down.Simultaneously; In the pressure regulation process of above-mentioned each embodiment, bearing power is unrestricted, need in the pressure regulation process, not have a mind to reduce load power consumption; Need not limit the protected mode of current-sharing power supply yet; Improve the reliability of current-sharing power supply and the compatibility and the ease for use of whole set equipment, improved competitiveness of product, reduced the purchase cost and the maintenance cost of current-sharing power supply.
The structural representation of the current-sharing power supply voltage regulating device that Fig. 5 provides for the embodiment of the invention four.The current-sharing power supply voltage regulating device of present embodiment can be the host computer that is connected with each current-sharing power supply or control appliance etc.As shown in Figure 5, the device of present embodiment comprises: acquisition module 51 and adjustment module 52.
Each functional module of the current-sharing power supply voltage regulating device of present embodiment can be used for carrying out flow process embodiment illustrated in fig. 2, and its operation principle repeats no more, and sees the description of method embodiment for details.
The current-sharing power supply voltage regulating device of present embodiment; By acquisition module according to the rated voltage of the current-sharing power supply adjustable voltage percentage when satisfying the unbalanced degree of current-sharing and require; Adjustable voltage thresholding when obtaining each current-sharing power supply and satisfying the current-sharing requirement; And successively the output voltage of a plurality of current-sharing power supplies is regulated with the regulation voltage that is less than or equal to the adjustable voltage thresholding at every turn by adjustment module; Regulate the most at last through one or many that the output voltage of each current-sharing power supply is adjusted to target voltage, in each adjustment process, guaranteed to satisfy the current-sharing requirement between each current-sharing power supply, solved because of the unbalance problem that causes some current-sharing power supply to close output of each current-sharing power supply output current; And then solved and close output because of the part current-sharing power supply and make the whole system power down finally cause the problem of voltage-regulation failure; Make to limit the load power demand and can successfully realize adjusting, reduced the cost of system, improved the compatibility of current-sharing power supply the output voltage of each current-sharing power supply.
Fig. 6 A is a kind of structural representation of the current-sharing power supply voltage regulating device that provides of the embodiment of the invention five.Present embodiment realizes that based on embodiment five shown in Fig. 6 A, the adjustment module 52 of present embodiment comprises: first obtains submodule 521, judgement submodule 522, the first adjusting submodule 523 and the second adjusting submodule 524.
Concrete, first obtains submodule 521, is used to obtain current voltage; First obtains the information of the current-sharing power supply that submodule 521 specifically can offer through communication chip from the singlechip chip of current-sharing power supply and obtains the corresponding current voltage of each current-sharing power supply.Judge submodule 522, obtain submodule 521 and be connected that whether the absolute value of difference that is used to judge target voltage and current voltage is greater than the adjustable voltage thresholding with first.First regulates submodule 523; Obtaining submodule 521 with judgement submodule 522 and first is connected; Be used in the judged result of judging submodule 522 when being; Regulation voltage when the adjustable voltage thresholding is regulated as this is regulated the output voltage of each current-sharing power supply successively, and triggers first and obtain the operation that current voltage is obtained in submodule 521 continuation execution.Second regulates submodule 524; Be connected with judgement submodule 522; Be used in the judged result of judging submodule 522 for not the time; Regulation voltage when the absolute value of difference is regulated as this is regulated the output voltage of each current-sharing power supply successively, is adjusted to target voltage with the output voltage with each current-sharing power supply.
Above-mentioned each function sub-modules can be used for carrying out method flow embodiment illustrated in fig. 3, and its operation principle repeats no more, and sees the description of method embodiment for details.In the present embodiment; The current-sharing power supply voltage regulating device is through obtaining each output voltage of regulating each current-sharing power supply of back; And the size of judging itself and target voltage determines whether the output voltage of current-sharing power supply is adjusted to target voltage, has the advantage of accuracy of judgement.
Further, shown in 6B, the adjustment module 52 of present embodiment also can comprise following submodule: second obtains submodule the 525, the 3rd regulates submodule 526 and control submodule 527.
Concrete, second obtains submodule 525, is used for according to current voltage, target voltage and adjustable voltage thresholding, obtains and regulates number of times and the corresponding regulation voltage of each adjusting; Second obtains the information of the current-sharing power supply that submodule 525 can report through communication chip from the singlechip chip of each current-sharing power supply and obtains current voltage; According to current voltage, target voltage and adjustable voltage thresholding, obtain and regulate number of times and each regulation voltage of regulating correspondence then.The 3rd regulates submodule 526, obtains submodule 525 and is connected with second, is used for the regulation voltage that basis obtains and successively the output voltage of each current-sharing power supply is regulated, and will regulate number of times and subtract 1; Control submodule 527; Regulate submodule 526 and be connected with the 3rd, be used for judging whether the adjusting number of times equals 0, and in judged result when being; Control the 3rd and regulate this adjusting operation of submodule 526 end;, control the 3rd and regulate the regulation voltage that submodule continues to carry out according to obtaining and successively the output voltage of each current-sharing power supply is regulated for not the time in judged result, and will regulate number of times and subtract 1 operation.
Wherein, second obtain submodule 525 and specifically comprise: acquiring unit and definite unit.Acquiring unit is used for absolute value with the difference of target voltage and current voltage divided by the adjustable voltage thresholding, obtains the adjusting frequency threshold value; Confirm that the unit is used for confirming being the adjusting number of times more than or equal to the integer of regulating frequency threshold value, and obtain each corresponding regulation voltage of regulating according to the adjusting number of times of determining.Wherein, confirm that it serves as according to confirming each corresponding regulation voltage of regulating that the unit is not more than the adjustable voltage thresholding with each adjusting.
Present embodiment provides a kind of operation principle of definite unit, is specially: confirm that the unit judges at first whether regulate frequency threshold value is integer; If judged result is for being, the regulation voltage with the adjustable voltage thresholding during as each the adjusting, and will regulate the adjusting number of times of frequency threshold value as reality.If judged result is for denying; Then round processing, promptly obtain the integer part of regulating frequency threshold value, then target voltage is deducted the product that current voltage deducts adjustable threshold voltage and this integer part again regulating frequency threshold value; Take absolute value afterwards; Regulation voltage with the result who takes absolute value during as last adjusting the, and the regulation voltage when the adjustable voltage thresholding regulated as other times, then the adjusting number of times of reality is that the integer part of the adjusting frequency threshold value obtained adds 1 again.
Above-mentioned each function sub-modules or unit can be used for carrying out method flow embodiment illustrated in fig. 4, and its operation principle repeats no more, and see the description of method embodiment for details.In the present embodiment, whether the current-sharing power supply voltage regulating device is 0 to determine whether the output voltage of current-sharing power supply to be adjusted to target voltage, the advantage that have the efficient height, is easy to realize through judge regulating number of times.
The current-sharing power supply voltage regulating device of present embodiment; It mainly is the voltage regulation function that utilizes the inner flow equalizing circuit self of current-sharing power supply; Within the corresponding voltage adjustable extent of the adjustable percentage of voltage, carry out repeatedly pressure regulation among a small circle through the control current-sharing power supply, to reach the purpose of final pressure regulation.The current-sharing power supply voltage regulating device of present embodiment is in the process that the output voltage of the current-sharing power supply that adopts sequencing that two or more parallel connections are used is regulated; All the time let current-sharing power supply be in equal stream mode; Solve the different problem that can't current-sharing of current-sharing power supply output voltage in the pilot process that occurs when two or more current-sharing power supplies carry out pressure regulation successively in the prior art, and then solved the problem that consequent current-sharing power supply overload causes the main frame power down.Simultaneously; Current-sharing power supply voltage regulating device at present embodiment carries out in the process of pressure regulation, and bearing power is unrestricted, need in the pressure regulation process, not have a mind to reduce load power consumption; Need not limit the protected mode of current-sharing power supply yet; Improve the reliability of current-sharing power supply and the compatibility and the ease for use of whole set equipment, improved competitiveness of product, reduced the purchase cost and the maintenance cost of current-sharing power supply.
The embodiment of the invention six provides a kind of network equipment, comprises the current-sharing power supply voltage regulating device.Wherein, the structure of stream supply voltage adjusting device can be referring to shown in Fig. 5, Fig. 6 A or Fig. 6 B, and its operation principle can be corresponding to Fig. 2, Fig. 3 or embodiment shown in Figure 4, repeats no more at this.
The network equipment of present embodiment comprises the current-sharing power supply voltage regulating device, can be used for the output voltage of current-sharing power supply is regulated, and can be the equipment such as host computer that are connected with each current-sharing power supply.The network equipment of present embodiment can be used for carrying out the flow process of the current-sharing power supply voltage adjusting method that said method embodiment provides; In the process that the output voltage of the current-sharing power supply that adopts sequencing that two or more parallel connections are used is regulated; Let current-sharing power supply be in equal stream mode equally, solved various defective of the prior art.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (10)
1. a current-sharing power supply voltage adjusting method is characterized in that, comprising:
Rated voltage and the adjustable percentage of voltage according to a plurality of same model current-sharing power supplies obtain the adjustable voltage thresholding;
According to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage.
2. current-sharing power supply voltage adjusting method according to claim 1; It is characterized in that; Said according to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage, comprises:
Obtain said current voltage;
Whether the absolute value of difference of judging said target voltage and said current voltage is greater than said adjustable voltage thresholding;
If judged result is for being, the regulation voltage when said adjustable voltage thresholding is regulated as this is regulated the output voltage of each said current-sharing power supply successively, and returns the operation that said current voltage is obtained in the continuation execution;
If judged result is that the regulation voltage the when absolute value of said difference is regulated as this is not regulated the output voltage of each said current-sharing power supply successively, is adjusted to said target voltage with the output voltage with each said current-sharing power supply.
3. current-sharing power supply voltage adjusting method according to claim 1; It is characterized in that; Said according to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage, comprises:
According to said current voltage, said target voltage and said adjustable voltage thresholding, obtain and regulate number of times and each regulation voltage of regulating correspondence;
Said regulation voltage according to obtaining is regulated the output voltage of each said current-sharing power supply successively, and said adjusting number of times is subtracted 1;
Judge whether said adjusting number of times equals 0;
If judged result is for being end operation;
If judged result is obtained and is regulated corresponding regulation voltage for not, and returns the said regulation voltage that continues to carry out according to obtaining and successively the output voltage of each said current-sharing power supply is regulated, and said adjusting number of times is subtracted 1 operation next time.
4. current-sharing power supply voltage adjusting method according to claim 3 is characterized in that, and is said according to said current voltage, said target voltage and said adjustable voltage thresholding, obtains the regulation voltage of regulating number of times and each adjusting correspondence and comprises:
The absolute value of the difference of said target voltage and said current voltage divided by said adjustable voltage thresholding, is obtained said adjusting frequency threshold value;
Will be more than or equal to the integer of said adjusting frequency threshold value as said adjusting number of times, and confirm each corresponding regulation voltage of regulating according to said adjusting number of times.
5. current-sharing power supply voltage adjusting method according to claim 4 is characterized in that, said will be more than or equal to the integer of said adjusting frequency threshold value as said adjusting number of times, and confirm to regulate corresponding regulation voltage and comprise at every turn according to said adjusting number of times:
Judge whether said adjusting frequency threshold value is integer;
If judged result is for being, with said adjusting frequency threshold value as said adjusting number of times, and with said adjustable voltage thresholding as said each regulation voltage of regulating correspondence;
If judged result rounds processing for not to said adjusting frequency threshold value, obtain said adjusting number of times and regulate corresponding regulation voltage, and said adjustable voltage thresholding is regulated corresponding regulation voltage as other times with last.
6. a current-sharing power supply voltage regulating device is characterized in that, comprising:
Acquisition module is used for rated voltage and the adjustable percentage of voltage according to a plurality of same model current-sharing power supplies, obtains the adjustable voltage thresholding;
Adjustment module; Be used for according to the corresponding current voltage of a plurality of said current-sharing power supplies; The condition that at every turn is less than or equal to said adjustable voltage thresholding according to regulation voltage is regulated the output voltage of each said current-sharing power supply respectively, till the output voltage with each said current-sharing power supply is adjusted to target voltage.
7. current-sharing power supply voltage regulating device according to claim 6 is characterized in that, said adjustment module comprises:
First obtains submodule, is used to obtain said current voltage;
Judge submodule, whether the absolute value of difference that is used to judge said target voltage and said current voltage is greater than said adjustable voltage thresholding;
First regulates submodule; Be used in the judged result of said judgement submodule when being; Regulation voltage when said adjustable voltage thresholding is regulated as this is regulated the output voltage of each said current-sharing power supply successively, and triggers said first and obtain the operation that said current voltage is obtained in submodule continuation execution;
Second regulates submodule; Be used in the judged result of said judgement submodule for not the time; Regulation voltage when the absolute value of said difference is regulated as this is regulated the output voltage of each said current-sharing power supply successively, is adjusted to said target voltage with the output voltage with each said current-sharing power supply.
8. current-sharing power supply voltage regulating device according to claim 6 is characterized in that, said adjustment module comprises:
Second obtains submodule, is used for according to said current voltage, said target voltage and said adjustable voltage thresholding, obtains and regulates number of times and each regulation voltage of regulating correspondence;
The 3rd regulates submodule, is used for successively the output voltage of each said current-sharing power supply being regulated according to the said regulation voltage that obtains, and said adjusting number of times is subtracted 1;
The control submodule; Be used to judge whether said adjusting number of times equals 0; And in judged result when being, control the said the 3rd and regulate submodule and finish this and regulate operation, in judged result for not the time; Control said the 3rd adjusting submodule continuation execution and successively the output voltage of each said current-sharing power supply is regulated, and said adjusting number of times is subtracted 1 operation according to the said regulation voltage that obtains.
9. current-sharing power supply voltage regulating device according to claim 8 is characterized in that, said second obtains submodule comprises:
Acquiring unit is used for absolute value with the difference of said target voltage and said current voltage divided by said adjustable voltage thresholding, obtains said adjusting number of times;
Confirm the unit, be used for more than or equal to the integer of said adjusting frequency threshold value as said adjusting number of times, and confirm each corresponding regulation voltage of regulating according to said adjusting number of times.
10. a network equipment is characterized in that, comprises each described current-sharing power supply voltage regulating device of claim 6-9.
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