CN102324838B - 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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- CN102324838B CN102324838B CN201110105889.6A CN201110105889A CN102324838B CN 102324838 B CN102324838 B CN 102324838B CN 201110105889 A CN201110105889 A CN 201110105889A CN 102324838 B CN102324838 B CN 102324838B
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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 control switch transistor turns on and off maintains a kind of power supply of regulated output voltage, and Switching Power Supply is generally by pulse width modulation (Pulse Width Modulation; Referred to as: PWM) control integration circuit (IntegratedCircuit; Referred to as: IC) and field effect transistor (MOSFET) form.Common Switching Power Supply has electric main is converted to the alternating-current switch power supply of low-voltage direct, high voltage direct current converted to the DC Module power supply of low-voltage direct.
Along with development and the innovation of power electronic technology, switch power technology is also constantly developing and innovating, so there is rearrangeable switch power supply.So-called rearrangeable switch power supply refers to the power supply that output voltage can regulate within the specific limits, for example, can be transferred to 53.5V by 48 volts (V), or be transferred to 48V by 53.5V.In order to regulate more easily the output voltage of power supply, communication chip and singlechip chip on power supply, are increased, for gathering the various states of power supply, the information such as such as output voltage, output current, current operating temperature are also uploaded to host computer, and host computer is regulated the output voltage of power supply as required.
In actual applications, common single power supply cannot meet power demands, therefore, multiple power supplys need to be carried out to parallel connection, jointly gives power receiving equipment (being load) power supply.In the time being powered to power receiving equipment by multiple power supply parallel connections, need these power supplys on average to share the required electric current of power receiving equipment, require to realize current-sharing between each power supply.The mode that realizes at present power supply current-sharing is mainly, between each power supply, current equalizing bus bar is set, and is detected the voltage of other power supplys by current equalizing bus bar; The voltage that other power supplys detected when current equalizing bus bar during higher than self busbar voltage, knows that the load of other power supplys carryings is larger, so this power supply adds the PWM duty ratio of large power supply by its feedback control loop, to heighten its output voltage; The voltage that other power supplys detected when current equalizing bus bar is during lower than self busbar voltage, knows that the load of himself carrying is larger, reduces the PWM duty ratio of power supply by its feedback control loop, to reduce its output voltage.In parallel use and be called as current-sharing power supply by the power supply that current equalizing bus bar carries out current-sharing.
In the time need to regulating the output voltage of current-sharing power supply, prior art is after first the output voltage of a power supply having been regulated, again the output voltage of next power supply is regulated, the all current-sharing power supplies that parallel connection used regulate one by one, in this adjustment process, there will be the inconsistent pilot process of different electrical power output voltage, if it is larger that output voltage differs, the electric current of each power supply output will be unbalance, therefore some power supply may close output, and then may cause whole system to make pressure regulation operation failure because of power down.As shown in Figure 1, power supply 11 and in parallel use of power supply 12 are powered to load 13, 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 to regulating the output voltage of the power supply shown in Fig. 1, host computer is first adjusted to 53.5V by the output voltage of power supply 11 by 48V, power supply output state before the output voltage of power supply 12 is adjusted to 53.5V as shown in Figure 1, now due to the reverse cut-off effect of diode D3 in the protective circuit of power supply 12 and diode D4, power supply 12 cannot power output, now load 13 will be born alone by power supply 11, if the required power of load 13 has exceeded the peak power output of power supply 11, will there will be overpower phenomenon, make power supply 11 enter overcurrent protection pattern and close output.In the time that voltage drops to 48V, power supply 12 starts power supply, and now, 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 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 exceed the peak power output of single power supply, but, this mode can increase system cost, reduce the compatibility of power supply, therefore, how, under the condition load power demand not being limited, successfully the output voltage of current-sharing power supply being regulated is to have problem to be solved.
Summary of the invention
The invention provides a kind of current-sharing power supply voltage adjusting method, device and the network equipment, under the condition load power demand not being limited, realize the adjusting of the output voltage to current-sharing power supply, reduce the compatibility of system cost, raising current-sharing power supply.
The invention provides a kind of current-sharing power supply voltage adjusting method, comprising:
According to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtain adjustable voltage thresholding;
According to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, until the output voltage of each described current-sharing power supply is adjusted to target voltage.
The invention provides a kind of current-sharing power supply voltage regulating device, comprising:
Acquisition module, for according to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtains adjustable voltage thresholding;
Adjustment module, be used for according to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, until the output voltage of each described current-sharing power supply is adjusted to target voltage.
The invention provides a kind of network equipment, comprise 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, according to the rated voltage of current-sharing power supply and the adjustable percentage of voltage, obtain adjustable voltage thresholding, then according to the regulation voltage that is less than or equal to adjustable voltage thresholding, the output voltage of multiple current-sharing power supplies is repeatedly regulated, make the electric current of multiple current-sharing power supply outputs in each adjustment process meet the requirement of current-sharing, solve prior art and caused the problem of some power-off output because there is current unbalance in pressure regulation process, system needn't be limited load power demand, can reach the object of the output voltage that regulates current-sharing power supply, reduce the cost of system, improve the compatibility of current-sharing power supply.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is prior art is carried out voltage-regulation pilot process view to current-sharing power supply;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 2 provides for the embodiment of the present invention one;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 3 provides for the embodiment of the present invention two;
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 4 provides for the embodiment of the present invention three;
The structural representation of the current-sharing power supply voltage regulating device that Fig. 5 provides for the embodiment of the present invention four;
A kind of structural representation of the current-sharing power supply voltage regulating device that Fig. 6 A provides for the embodiment of the present invention five;
Another structural representation of the current-sharing power supply voltage regulating device that Fig. 6 B provides for the embodiment of the present invention five.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 2 provides for the embodiment of the present invention one.As shown in Figure 2, the method for the present embodiment comprises:
Step 201, according to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtain adjustable voltage thresholding.
In the present embodiment, by multiple same model power supplys powering load that uses in parallel, these same models power supply using in parallel is all called as current-sharing power supply.Between multiple current-sharing power supplies, be provided with current equalizing bus bar, for making multiple current-sharing power supplies 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., and after current-sharing power supply is determined, above-mentioned parameter is also just definite, and for host computer, the above-mentioned parameter of current-sharing power supply is known.
In the time of the use in parallel of multiple current-sharing power supplies, the electric current of current-sharing power supply output can not be identical, allows the electric current of each current-sharing power supply output to have certain trueness error, and this trueness error is referred to as the unbalanced degree thresholding of current-sharing.If the unbalanced degree of the current-sharing calculating according to the actual output current of current-sharing power supply is not more than the unbalanced degree thresholding of (being less than or equal to) above-mentioned current-sharing, just think that each current-sharing power supply meets the unbalanced degree requirement of current-sharing, notes by abridging as meeting current-sharing requirement.The rated current of wherein, 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.Voltage is adjustable, and percentage refers to when the unbalanced degree of current-sharing that current-sharing power supply is corresponding 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, voltage is adjustable, and percentage is in the process of designing power supply, taking the unbalanced degree of current-sharing as benchmark, fully examine that the factors such as the precision difference of various devices calculate, therefore, once power supply determined, the adjustable percentage of voltage that this power supply is corresponding has also just been determined.Conventionally, adjustable voltage percentage is between 0.5%-1%.
Concrete, host computer multiplies each other the rated voltage of current-sharing power supply and the adjustable percentage of voltage, using product as adjustable voltage thresholding.That is to say, in the time that the voltage difference between two current-sharing power supplies is not more than (being less than or equal to) adjustable voltage thresholding, these two current-sharing power supplies meet respectively the unbalanced degree requirement of current-sharing (the unbalanced degree of current-sharing calculating according to the actual output current of these two current-sharing power supplies is all not more than the unbalanced degree thresholding of current-sharing).
Step 202, the current voltage corresponding according to multiple current-sharing power supplies, the condition that is at every turn less than or equal to adjustable voltage thresholding according to regulation voltage regulates the output voltage of each current-sharing power supply respectively, until the output voltage of each current-sharing power supply is adjusted to target voltage.
In the present embodiment, current voltage refers to the voltage of each current-sharing power supply output before each adjusting, and now the voltage of each current-sharing power supply output is identical.Before host computer regulates for the first time to multiple current-sharing power supplies, current voltage is exactly the initial voltage that need to regulate each current-sharing power supply.In addition, pre-set target voltage corresponding to 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 to regulate each current-sharing power supply.
In the present embodiment, host computer regulates the output voltage of multiple current-sharing power supplies respectively with the regulation voltage that is not more than (being less than or equal to) adjustable voltage thresholding at every turn, the voltage range regulating as required regulates by one or many, and the output voltage of each current-sharing power supply is adjusted to target voltage.Wherein, described " adjusting " can increase the output voltage of current-sharing power supply, can be also the output voltage that reduces current-sharing power supply.
The current-sharing power supply voltage adjusting method of the present embodiment, the adjustable voltage percentage of host computer according to the rated voltage of current-sharing power supply with when meeting the unbalanced degree of current-sharing and requiring, adjustable voltage thresholding when obtaining each current-sharing power supply and meeting current-sharing requirement, and regulation voltage when regulating is not more than (being less than or equal to) adjustable voltage thresholding and carrys out the output voltage to multiple current-sharing power supplies respectively and regulate at every turn, and the output voltage of each current-sharing power supply is adjusted to target voltage the most at last, in each adjustment process, ensure to meet between each current-sharing power supply current-sharing requirement, solve 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 because of part current-sharing power supply close output make whole system power down finally cause the problem of voltage-regulation failure, make to limit the adjusting that can successfully realize the output voltage to each current-sharing power supply to load power demand, reduce the cost of system, improve the compatibility of 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 present invention two.As shown in Figure 3, the method for the present embodiment comprises:
Step 301, according to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtain adjustable voltage thresholding.
This step can refer to the description of step 201 in embodiment mono-, does not repeat them here.
Step 302, obtain current voltage.
Before the output voltage to each current-sharing power supply does not regulate, the current voltage that host computer obtains is the initial voltage need to regulate each current-sharing power supply time.The present embodiment establish and regulate before the output voltage of each current-sharing power supply be V0, and to establish target regulated voltage be V1.
Concrete, on each current-sharing power supply, be provided with communication chip and singlechip chip, the state of singlechip chip Real-time Collection current-sharing power supply, the information such as such as output voltage, output current and working temperature, and report host computer by communication chip.The information that host computer reports from each current-sharing power supply, obtain the output voltage of each current-sharing power supply.The output voltage of each current-sharing power supply is identical, is now V0.
Step 303, judge whether the absolute value of the difference of target voltage and current voltage is greater than adjustable voltage thresholding; If the determination result is YES, execution step 304; If judged result is no, execution step 305.
Concrete, host computer obtains after the current voltage of each current-sharing power supply, and current voltage and target voltage are compared, if target voltage is greater than current voltage, deducts current voltage with target voltage, obtains both differences; If target voltage is less than current voltage, deduct target voltage with current voltage, obtain both differences, obtain the absolute value of the difference of target voltage and current voltage; Then, the absolute value of the difference of obtaining and adjustable voltage thresholding are compared; If the absolute value of difference is greater than adjustable voltage thresholding, explanation will be adjusted to target voltage by the output voltage of each current-sharing power supply, need to be through repeatedly regulating; If the absolute value of the difference of obtaining is not more than (being less than or equal to) adjustable voltage thresholding, illustrates and only need the output voltage of each current-sharing power supply to be adjusted to target voltage through Primary regulation.
Step 304, regulation voltage using adjustable voltage thresholding when this regulates regulate the output voltage of each current-sharing power supply successively, and return and continue execution step 302.
Wherein, need to be through repeatedly regulating the output voltage of each current-sharing power supply could be adjusted to target voltage time when knowing, in in the each adjustment process of guarantee, each current-sharing power supply meets current-sharing requirement, regulation voltage when host computer regulates using adjustable voltage thresholding as this, so that regulate least number of times.Wherein, regulation voltage during using adjustable voltage thresholding as each adjusting is a kind of preferably implementation, but be not limited to this, regulation voltage when any magnitude of voltage that is less than adjustable voltage thresholding all also can be used as this and regulates regulates the number of times can be different because of the difference of regulation voltage simultaneously.
Concrete, after the regulation voltage in the time determining that this regulates, host computer regulates control command according to regulation voltage formation voltage, 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 regulates PWM duty ratio separately by feedback control loop, to reach the object of regulation output voltage.
In the present embodiment, host computer is by voltage-regulation control command is sent to current-sharing power supply one by one, so that each current-sharing power supply is regulated one by one.For example: suppose that adjustable threshold voltage (being the regulation voltage of this adjusting) is Δ V, host computer is first adjusted to V0+ Δ V by the output voltage of a current-sharing power supply by V0 by voltage-regulation control command; Then the output voltage of second current-sharing power supply is adjusted to V0+ Δ V, until just completed this adjustment operation after the output voltage of all current-sharing power supplies is adjusted to V0+ Δ V.The output voltage of each current-sharing power supply after this regulates, that is current voltage becomes V0+ Δ V.Wherein, if target voltage is greater than current voltage, Δ V is greater than 0, and, after regulating through this, it is large that the output voltage of each current-sharing power supply becomes; If target voltage is less than current voltage, Δ V is less than 0, and after regulating through this, the output voltage of each current-sharing power supply diminishes.
Afterwards, host computer continues execution step 302.Due to the singlechip chip of each current-sharing power supply can Real-time Collection current-sharing power supply output voltage, and report host computer by communication chip, therefore, now to perform step 302 current voltages that get are output voltages of each current-sharing power supply after Primary regulation to host computer again, i.e. V0+ Δ V.After getting current voltage, continue execution step 303, judge whether the absolute value of the difference of target voltage and current voltage is greater than adjustable voltage thresholding; If judged result is yes, continue execution step 304, the regulation voltage while preferably adjusting using adjustable voltage thresholding as this, host computer continues to control successively each current-sharing power supply and carries out the adjusting of output voltage, the output voltage of each current-sharing power supply after this regulates, that is host computer again performs step 302 current voltages that get and becomes V0+2 Δ V.
Afterwards, continue circulation and carry out above-mentioned steps 302-step 304, turn and perform step 305 until step 303 is judged when the absolute value of the difference of target voltage and current voltage is not more than (being less than or equal to) adjustable voltage thresholding.
Step 305, regulation voltage using the absolute value of difference when this regulates regulate the output voltage of each current-sharing power supply successively, so that the output voltage of each current-sharing power supply is adjusted to target voltage.
In the time judging the absolute value of difference of target voltage and current voltage and be less than adjustable voltage thresholding, illustrate in ensureing that each current-sharing power supply meets current-sharing requirement, Primary regulation operation once or is again carried out in execution can be adjusted to target voltage by the output voltage of each current-sharing power supply.
Therefore, the regulation voltage of host computer using the absolute value of the difference of target voltage and current voltage as this adjusting, because the absolute value of this difference is not more than (being less than or equal to) adjustable voltage thresholding, therefore can ensure that in this adjustment process, each current-sharing power supply meets current-sharing requirement; Then, host computer regulates control command according to the absolute value formation voltage of this difference, and sends to successively each current-sharing power supply, makes each current-sharing power supply regulate PWM duty ratio separately according to control command by 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, in the present embodiment, step 302-step 305 can be regarded a kind of embodiment of step 202 in embodiment mono-as.
In addition, in this explanation, in primary voltage adjustment process, except adopting one by one regulative mode (mode successively each current-sharing power supply being regulated), host computer can also adopt the mode that all current-sharing power supplies are regulated simultaneously to carry out voltage-regulation to each current-sharing power supply, be that host computer sends voltage-regulation control command to all current-sharing power supplies simultaneously, each current-sharing power supply regulates according to voltage-regulation control command simultaneously.Moreover, host computer can also adopt the mode simultaneously part current-sharing power supply being regulated to carry out voltage-regulation to each current-sharing power supply, in primary voltage adjustment process, host computer is not to send voltage-regulation control command to current-sharing power supply one by one, neither send voltage-regulation control command to all current-sharing power supplies simultaneously, but send voltage-regulation control command to a part of current-sharing power supply at every turn, until the output voltage of all current-sharing power supplies has all been regulated to a Δ V.
The current-sharing power supply voltage adjusting method of the present embodiment, the adjustable voltage percentage of host computer according to the rated voltage of current-sharing power supply with when meeting the unbalanced degree of current-sharing and requiring, adjustable voltage thresholding when obtaining each current-sharing power supply and meeting current-sharing requirement, and the regulation voltage when repeatedly regulating carrys out the output voltage to multiple current-sharing power supplies successively and regulates using adjustable voltage thresholding, and the output voltage of each current-sharing power supply is adjusted to target voltage the most at last, in each adjustment process, ensure to meet between each current-sharing power supply current-sharing requirement, solve 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 because of part current-sharing power supply close output make whole system power down finally cause the problem of voltage-regulation failure, make to limit the adjusting that can successfully realize the output voltage to each current-sharing power supply to load power demand, reduce the cost of system, improve the compatibility of current-sharing power supply.Meanwhile, in the present embodiment, regulation voltage when host computer is tried one's best using adjustable voltage thresholding as each adjusting, has reduced adjusting number of times, has the advantage economizing on resources.
The flow chart of the current-sharing power supply voltage adjusting method that Fig. 4 provides for the embodiment of the present invention three.As shown in Figure 4, the method for the present embodiment comprises:
Step 401, according to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtain adjustable voltage thresholding.
This step can refer to the description of step 201 in embodiment mono-, does not repeat them here.
Step 402, obtain current voltage.
In the present embodiment, before current voltage refers to that the output voltage to each current-sharing power supply does not regulate, the output voltage of each current-sharing power supply, i.e. initial voltage, specifically can and report host computer by communication chip by the singlechip chip collection arranging on each current-sharing power supply.
Step 403, according to current voltage, target voltage and adjustable voltage thresholding, obtain and regulate number of times and each regulate corresponding regulation voltage.
The present embodiment provides a kind of host computer to obtain and regulates number of times and each preferred implementation that regulates corresponding regulation voltage, comprise: host computer by the absolute value of the difference of target voltage and current voltage divided by adjustable voltage thresholding, using the business of being divided by as regulate frequency threshold value; Then, regulate the integer of frequency threshold value as regulating number of times using being more than or equal to, and determine each corresponding regulation voltage that regulates according to definite adjusting number of times.Wherein, determine each regulate corresponding regulation voltage according to for ensureing that regulation voltage is not more than adjustable voltage thresholding.For example: if regulate frequency threshold value to equal 15, to regulate number of times can be 15 or be greater than any integer of 15.Be 15.5 if regulate frequency threshold value, to regulate number of times can be 16 or be greater than any integer of 16.
Further, the present embodiment provides a kind of obtaining to regulate number of times and each preferred implementation that regulates corresponding adjustable voltage, specifically comprise: host computer judges whether this adjusting frequency threshold value is integer, judge whether the absolute value of difference can be divided exactly by adjustable voltage thresholding; If judged result is yes, explanation, at every turn using adjustable voltage thresholding as regulation voltage, just can regulate the output voltage of each current-sharing power supply is adjusted to target voltage through integer; If judged result is no, illustrate using adjustable voltage thresholding as regulation voltage, after regulating, integer time also needs again through once with to be less than the adjustment operation of adjustable voltage thresholding as regulation voltage.
Based on this, when judged result is when being, host computer is using adjustable voltage thresholding as regulation voltage corresponding to each adjusting, the corresponding frequency threshold value that regulates is actual adjusting number of times, can, in ensureing in each adjustment process that each current-sharing power supply meets current-sharing requirement, make to regulate least number of times like this.When judged result is while being no, host computer is to regulating frequency threshold value to round processing, get the integer part that regulates frequency threshold value, thereby obtain the number of times using adjustable voltage thresholding as regulation voltage, then target voltage is deducted to current voltage and deducts again the product of adjustable threshold voltage and this integer part, take absolute value afterwards, then using the result taking absolute value as regulation voltage corresponding to last adjusting, and repeatedly regulated corresponding regulation voltage before using adjustable voltage thresholding as last adjusting, actual adjusting number of times is that the integer part of the adjusting frequency threshold value obtained adds 1 again.
For example: suppose the current-sharing power supply that two current voltages are 48V, the adjustable percentage of voltage of each current-sharing power supply is 1%, and rated voltage is 20V, can obtain adjustable voltage thresholding by step 401 is 0.2V.The current-sharing degree of unbalance thresholding of simultaneously supposing two current-sharing power supplies is 5%, and rated current is 20A, and the load of jointly carrying 30A describes as example so that the output voltage of two current-sharing power supplies is adjusted to target voltage 53.5V by 48V.
Known according to the relation of adjustable voltage thresholding and the unbalanced degree thresholding of current-sharing, in the time that the output voltage of two current-sharing power supplies differs 0.2V, the unbalanced degree of the output current of two current-sharing power supplies just reaches 5%.Known 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, by calculating 5.5/0.2=27.5, known at least needs through 27.5 adjustment operations, find that through judging this adjusting number of times is not integer, round numbers 27, calculate afterwards 53.5-48-0.2 × 27=0.1, regulation voltage by 0.1V during as last adjusting, and using 0.2V as the regulation voltage repeatedly regulating before, actual regulates through 28 times.
In this explanation, regulation voltage when the above-mentioned adjusting number of times obtaining and each adjusting is not limited to this, all passable as long as the regulation voltage while meeting each 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 minimal adjustment number of times, can all be set to 0.1V by the regulation voltage when at every turn regulating, practical adjustments number of times is 55 times; In addition, also the regulation voltage that wherein several times regulate is set to 0.1V, the regulation voltage of several times is set to 0.15V again, regulation voltage in residual accommodation number of times is set to 0.2V, now corresponding adjusting number of times also can adaptability change, in addition can also there be other multiple set-up modes, do not enumerate at this.
The regulation voltage that step 404, basis are obtained regulates the output voltage of each current-sharing power supply successively, and adjusting number of times is subtracted to 1.
Concrete, obtain after regulation voltage corresponding while regulating number of times and each adjusting, host computer is therefrom selected a regulation voltage, and regulate control command with this regulation voltage formation voltage, successively voltage-regulation control command is sent to each current-sharing power supply, make each current-sharing power supply complete the adjusting to output voltage by feedback loop control PWM duty ratio separately.The voltage-regulation control command all generating according to this regulation voltage when all current-sharing power supplies completes after adjusting, and this adjustment operation finishes.Meanwhile, host computer subtracts 1 by adjusting number of times, to regulate number of times to judge whether the output voltage of each current-sharing power supply to be adjusted to the operation of target voltage by record.
Step 405, judge regulate number of times whether equal 0; If the determination result is YES, execution step 407; If judged result is no, execution step 406.
Host computer judges to regulate number of times whether to equal 0, if regulate number of times to equal 0, illustrates the output voltage of each current-sharing power supply is adjusted to target voltage, performs step 407; Be not equal to 0 if reconcile number of times, illustrate and also need to proceed adjustment operation, perform step 406.
Step 406, obtain and regulate corresponding regulation voltage next time, and return and continue execution step 404.
Host computer continues in regulation voltage corresponding to each adjusting of obtaining from step 403, obtain and regulate corresponding regulation voltage next time, and continue execution step 404, and continue according to the regulation voltage newly obtaining, the output voltage of each current-sharing power supply to be regulated, be 0 until regulate number of times.
Step 407, end operation.
Continue to describe with above-mentioned example, the regulation voltage of this adjusting that host computer gets is 0.2V, first the output voltage of one of them current-sharing power supply is adjusted to 48.2V.Now, from above-mentioned formula (1), (2) and (3), the unbalanced degree of current-sharing of two current-sharing power supplies reaches 5%, and the output current of the current-sharing power supply that output voltage is 48.2V is 16A, and the output current of another current-sharing power supply is 14A.Then, the output voltage of another current-sharing power supply is also adjusted to 48.2V by host computer, and now because the output voltage of two current-sharing power supplies is identical, the unbalanced degree of the current-sharing of two current-sharing power supplies is 0%, the output current of two current-sharing power supplies is respectively 50% of total current, is 15A.
Through judging that regulating number of times is not 0, need to continue the output voltage of a current-sharing power supply to be adjusted to after 48.4V, then the output voltage of another current-sharing power supply is also adjusted to 48.4V.The like, until the output voltage of two current-sharing power supplies is adjusted to 53.4V.
Now, through judging that demodulation number of times is not still 0, but now need the output voltage of a current-sharing power supply to regulate increase 0.1V to be adjusted to 53.5V, now from above-mentioned formula (1), (2) and (3), the unbalanced degree of current-sharing of two current-sharing power supplies reaches 2.5%, 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, the output voltage of another current-sharing power supply is also adjusted to 53.5V by host computer, and now because the output voltage of two current-sharing power supplies is identical, the unbalanced degree of the current-sharing of two current-sharing power supplies is 0%, the output current of two current-sharing power supplies is respectively 50% of total current, is 15A.
Wherein, above-mentioned steps 403-step 407 can be regarded a kind of embodiment of step 202 in embodiment mono-as.
The current-sharing power supply voltage adjusting method of the present embodiment, the adjustable voltage percentage of host computer according to the rated voltage of current-sharing power supply with when meeting the unbalanced degree of current-sharing and requiring, adjustable voltage thresholding when obtaining each current-sharing power supply and meeting current-sharing requirement, and the regulation voltage when repeatedly regulating carrys out the output voltage to multiple current-sharing power supplies successively and regulates using adjustable voltage thresholding, and by regulating number of times to judge whether the output voltage of each current-sharing power supply to be adjusted to target voltage, in each adjustment process, ensure to meet between each current-sharing power supply current-sharing requirement, solve 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 because of part current-sharing power supply close output make whole system power down finally cause the problem of voltage-regulation failure, make to limit the adjusting that can successfully realize the output voltage to each current-sharing power supply to load power demand, reduce the cost of system, improve the compatibility of current-sharing power supply.Meanwhile, in the present embodiment, regulation voltage when host computer is tried one's best using adjustable voltage thresholding as each adjusting, has reduced adjusting number of times, has the advantage economizing on resources.
In the various embodiments described above, host computer can be connected with current-sharing power supply by modes such as RS485.
The various embodiments described above are mainly to utilize the voltage regulation function of the inner flow equalizing circuit self of current-sharing power supply, carry out repeatedly pressure regulation among a small circle, to reach the object of final pressure regulation by PC control current-sharing power supply within voltage adjustable extent corresponding to the adjustable percentage of voltage.The various embodiments described above are in the process that adopts sequencing to regulate the output voltage of two or more current-sharing power supplies that use in parallel, all the time allow current-sharing power supply in equal stream mode, solve in prior art the different problem that cannot current-sharing of current-sharing power supply output voltage in the pilot process occurring when two or more current-sharing power supplies carry out successively pressure regulation, and then solved consequent current-sharing power supply overload and cause the problem of main frame power down.Simultaneously; in the pressure regulation process of the various embodiments described above; bearing power is unrestricted; need in pressure regulation process, not have a mind to reduce load power consumption; do not need to limit the protected mode of current-sharing power supply yet; improve the reliability of current-sharing power supply and the compatibility of whole set equipment and ease for use, improved the competitiveness of product, reduced 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 present invention four.The current-sharing power supply voltage regulating device of the present embodiment can be host computer or the control appliance etc. being connected with each current-sharing power supply.As shown in Figure 5, the device of the present embodiment comprises: acquisition module 51 and adjustment module 52.
Acquisition module 51, for according to the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage, obtains adjustable voltage thresholding; Voltage is adjustable, and percentage refers to when the unbalanced degree of current-sharing that current-sharing power supply is corresponding equals the unbalanced degree thresholding of current-sharing, and the voltage difference of two current-sharing power supply outputs accounts for the percentage of rated voltage.Concrete, acquisition module 51 is for rated voltage and the adjustable percentage of voltage are multiplied each other, using product as adjustable voltage thresholding.Adjustment module 52, be connected with acquisition module 51, for the current voltage corresponding according to multiple current-sharing power supplies, the condition that is at every turn less than or equal to adjustable voltage thresholding according to regulation voltage regulates the output voltage of each current-sharing power supply respectively, until the output voltage of each current-sharing power supply is adjusted to target voltage.
Each functional module of the current-sharing power supply voltage regulating device of the present embodiment can be used for carrying out flow process embodiment illustrated in fig. 2, and its operation principle repeats no more, and refers to the description of embodiment of the method.
The current-sharing power supply voltage regulating device of the present embodiment, adjustable voltage percentage by acquisition module according to the rated voltage of current-sharing power supply and when meeting the unbalanced degree of current-sharing and requiring, adjustable voltage thresholding when obtaining each current-sharing power supply and meeting current-sharing requirement, and successively the output voltage of multiple current-sharing power supplies is regulated with the regulation voltage that is less than or equal to adjustable voltage thresholding at every turn by adjustment module, regulate the output voltage of each current-sharing power supply to be the most at last adjusted to target voltage by one or many, in each adjustment process, ensure to meet between each current-sharing power supply current-sharing requirement, solve 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 because of part current-sharing power supply close output make whole system power down finally cause the problem of voltage-regulation failure, make to limit the adjusting that can successfully realize the output voltage to each current-sharing power supply to load power demand, reduce the cost of system, improve the compatibility of current-sharing power supply.
A kind of structural representation of the current-sharing power supply voltage regulating device that Fig. 6 A provides for the embodiment of the present invention five.The present embodiment is realized based on embodiment five, and as shown in Figure 6A, the adjustment module 52 of the present embodiment comprises: first obtain submodule 521, judge submodule 522, first regulate submodule 523 and second to regulate submodule 524.
Concrete, first obtains submodule 521, for obtaining current voltage; First obtains in the information of the current-sharing power supply that submodule 521 specifically can offer by communication chip from the singlechip chip of current-sharing power supply and obtains the current voltage that each current-sharing power supply is corresponding.Judge submodule 522, obtain submodule 521 and be connected with first whether be greater than adjustable voltage thresholding for the absolute value of the difference that judges target voltage and current voltage.First regulates submodule 523, with judge that submodule 522 and first obtains submodule 521 and is connected, for in the judged result that judges submodule 522 when being, regulation voltage using adjustable voltage thresholding when this regulates regulates the output voltage of each current-sharing power supply successively, and triggers first and obtain submodule 521 and continue to carry out the operation of obtaining current voltage.Second regulates submodule 524, be connected with judging submodule 522, for in the judged result that judges submodule 522 while being no, regulation voltage using the absolute value of difference when this regulates regulates the output voltage of each current-sharing power supply successively, so that the output voltage of each current-sharing power supply is adjusted to target voltage.
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 refers to the description of embodiment of the method.In the present embodiment, current-sharing power supply voltage regulating device is by obtaining the output voltage of each current-sharing power supply after each adjusting, and the size that judges itself and target voltage determines whether the output voltage of current-sharing power supply to be adjusted to target voltage, there is the advantage of accuracy of judgement.
Further, as shown in 6B, the adjustment module 52 of the present embodiment also can comprise following submodule: second obtains submodule 525, the 3rd regulates submodule 526 and control submodule 527.
Concrete, second obtains submodule 525, for according to current voltage, target voltage and adjustable voltage thresholding, obtains and regulates number of times and regulation voltage corresponding to each adjusting; Second obtains the information of the current-sharing power supply that submodule 525 can report by communication chip from the singlechip chip of each current-sharing power supply and obtains current voltage, then according to current voltage, target voltage and adjustable voltage thresholding, obtain and regulate number of times and regulation voltage corresponding to each adjusting.The 3rd regulates submodule 526, obtains submodule 525 and is connected with second, for successively the output voltage of each current-sharing power supply being regulated according to the regulation voltage obtaining, and adjusting number of times is subtracted to 1; Control submodule 527, regulate submodule 526 to be connected with the 3rd, be used for judging to regulate number of times whether to equal 0, and in judged result when being, controlling the 3rd regulates submodule 526 to finish this adjustment operation,, control the 3rd regulation voltage that regulates submodule to continue to carry out according to obtaining and successively the output voltage of each current-sharing power supply is regulated while being no in judged result, and will regulate number of times to subtract 1 operation.
Wherein, second obtain submodule 525 and specifically comprise: acquiring unit and determining unit.Acquiring unit for by the absolute value of the difference of target voltage and current voltage divided by adjustable voltage thresholding, obtain adjusting frequency threshold value; Determining unit regulates the integer of frequency threshold value for regulating number of times for determining to be more than or equal to, and obtains regulation voltage corresponding to each adjusting according to the adjusting number of times of determining.Wherein, determining unit is not more than adjustable voltage thresholding as regulate corresponding regulation voltage according to determining at every turn to regulate at every turn.
The present embodiment provides a kind of operation principle of determining unit, is specially: first determining unit judges whether adjusting frequency threshold value is integer; If judged result is yes, the regulation voltage during using adjustable voltage thresholding as each adjusting, and will regulate frequency threshold value as actual adjusting number of times.If judged result is no, to regulating frequency threshold value to round processing, obtain the integer part that regulates frequency threshold value, then target voltage is deducted to current voltage and deducts again the product of adjustable threshold voltage and this integer part, take absolute value afterwards, regulation voltage during using the result taking absolute value as last adjusting, and using adjustable voltage thresholding the regulation voltage when other times regulate, actual adjusting number of times 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 refer to the description of embodiment of the method.In the present embodiment, current-sharing power supply voltage regulating device is by judging that whether regulate number of times is 0 to determine whether the output voltage of current-sharing power supply to be adjusted to target voltage, have efficiency high, be easy to the advantage that realizes.
The current-sharing power supply voltage regulating device of the present embodiment, it is mainly the voltage regulation function that utilizes the inner flow equalizing circuit self of current-sharing power supply, within voltage adjustable extent corresponding to the adjustable percentage of voltage, carry out repeatedly pressure regulation among a small circle by controlling current-sharing power supply, to reach the object of final pressure regulation.The current-sharing power supply voltage regulating device of the present embodiment is in the process that adopts sequencing to regulate the output voltage of two or more current-sharing power supplies that use in parallel, all the time allow current-sharing power supply in equal stream mode, solve in prior art the different problem that cannot current-sharing of current-sharing power supply output voltage in the pilot process occurring when two or more current-sharing power supplies carry out successively pressure regulation, and then solved consequent current-sharing power supply overload and cause the problem of main frame power down.Simultaneously; carry out in the process of pressure regulation at the current-sharing power supply voltage regulating device of the present embodiment; bearing power is unrestricted; need in pressure regulation process, not have a mind to reduce load power consumption; do not need to limit the protected mode of current-sharing power supply yet; improve the reliability of current-sharing power supply and the compatibility of whole set equipment and ease for use, improved the competitiveness of product, reduced purchase cost and the maintenance cost of current-sharing power supply.
The embodiment of the present invention six provides a kind of network equipment, comprises 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 the embodiment shown in Fig. 2, Fig. 3 or Fig. 4, do not repeat them here.
The network equipment of the present embodiment comprises current-sharing power supply voltage regulating device, can be used for the output voltage of current-sharing power supply to regulate, and can be the equipment such as the host computer being connected with each current-sharing power supply.The network equipment of the 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 adopts sequencing to regulate the output voltage of two or more current-sharing power supplies that use in parallel, allow equally current-sharing power supply in equal stream mode, solved various defect 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 complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a current-sharing power supply voltage adjusting method, is characterized in that, comprising:
The rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage are multiplied each other, obtain adjustable voltage thresholding; Voltage is adjustable, and percentage refers to when the unbalanced degree of current-sharing that current-sharing power supply is corresponding 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; The rated current of wherein, 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;
According to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, until the output voltage of each described 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, described according to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, comprises until the output voltage of each described current-sharing power supply is adjusted to target voltage:
Obtain described current voltage;
Whether the absolute value that judges the difference of described target voltage and described current voltage is greater than described adjustable voltage thresholding;
If the determination result is YES, the regulation voltage using described adjustable voltage thresholding when this regulates regulates the output voltage of each described current-sharing power supply successively, and returns and continue to carry out the operation of obtaining described current voltage;
If judged result is no, the regulation voltage using the absolute value of described difference when this regulates regulates the output voltage of each described current-sharing power supply successively, so that the output voltage of each described current-sharing power supply is adjusted to described target voltage.
3. current-sharing power supply voltage adjusting method according to claim 1, it is characterized in that, described according to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, comprises until the output voltage of each described current-sharing power supply is adjusted to target voltage:
According to described current voltage, described target voltage and described adjustable voltage thresholding, obtain and regulate number of times and regulation voltage corresponding to each adjusting;
Successively the output voltage of each described current-sharing power supply is regulated according to the described regulation voltage obtaining, and described adjusting number of times is subtracted to 1;
Judge whether described adjusting number of times equals 0;
If the determination result is YES, end operation;
If judged result is no, obtains and regulate corresponding regulation voltage next time, and return to continue to carry out according to the described regulation voltage that obtains and successively the output voltage of each described current-sharing power supply is regulated, and described adjusting number of times is subtracted to 1 operation.
4. current-sharing power supply voltage adjusting method according to claim 3, is characterized in that, described according to described current voltage, described target voltage and described adjustable voltage thresholding, obtains and regulates number of times and regulation voltage corresponding to each adjusting to comprise:
The absolute value of the difference of described target voltage and described current voltage, divided by described adjustable voltage thresholding, is obtained to described adjusting frequency threshold value;
Using the integer that is more than or equal to described adjusting frequency threshold value as described adjusting number of times, and determine each corresponding regulation voltage that regulates according to described adjusting number of times.
5. current-sharing power supply voltage adjusting method according to claim 4, is characterized in that, described using the integer that is more than or equal to described adjusting frequency threshold value as described adjusting number of times, and determines that according to described adjusting number of times regulation voltage corresponding to each adjusting comprises:
Judge whether described adjusting frequency threshold value is integer;
If the determination result is YES, using described adjusting frequency threshold value as described adjusting number of times, and using described adjustable voltage thresholding as regulation voltage corresponding to described each adjusting;
If judged result is no, described adjusting frequency threshold value is rounded to processing, obtain described adjusting number of times and regulation voltage corresponding to last adjusting, and described adjustable voltage thresholding is regulated to corresponding regulation voltages as other times.
6. a current-sharing power supply voltage regulating device, is characterized in that, comprising:
Acquisition module, for the rated voltage of multiple same model current-sharing power supplies and the adjustable percentage of voltage are multiplied each other, obtains adjustable voltage thresholding; Voltage is adjustable, and percentage refers to when the unbalanced degree of current-sharing that current-sharing power supply is corresponding 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; The rated current of wherein, 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;
Adjustment module, be used for according to current voltage corresponding to multiple described current-sharing power supplies, the condition that is at every turn less than or equal to described adjustable voltage thresholding according to regulation voltage regulates the output voltage of each described current-sharing power supply respectively, until the output voltage of each described 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, described adjustment module comprises:
First obtains submodule, for obtaining described current voltage;
Judge submodule, whether be greater than described adjustable voltage thresholding for the absolute value of the difference that judges described target voltage and described current voltage;
First regulates submodule, for in the described judged result that judges submodule when being, regulation voltage using described adjustable voltage thresholding when this regulates regulates the output voltage of each described current-sharing power supply successively, and triggers described first and obtain submodule and continue to carry out the operation of obtaining described current voltage;
Second regulates submodule, when being no in the described judged result that judges submodule, regulation voltage using the absolute value of described difference when this regulates regulates the output voltage of each described current-sharing power supply successively, so that the output voltage of each described current-sharing power supply is adjusted to described target voltage.
8. current-sharing power supply voltage regulating device according to claim 6, is characterized in that, described adjustment module comprises:
Second obtains submodule, for according to described current voltage, described target voltage and described adjustable voltage thresholding, obtains and regulates number of times and regulation voltage corresponding to each adjusting;
The 3rd regulates submodule, for successively the output voltage of each described current-sharing power supply being regulated according to the described regulation voltage obtaining, and described adjusting number of times is subtracted to 1;
Control submodule, be used for judging whether described adjusting number of times equals 0, and in judged result when being, controlling the described the 3rd regulates submodule to finish this adjustment operation, in judged result while being no, control the described the 3rd described regulation voltage that regulates submodule to continue to carry out according to obtaining and successively the output voltage of each described current-sharing power supply is regulated, and described adjusting number of times is subtracted to 1 operation.
9. current-sharing power supply voltage regulating device according to claim 8, is characterized in that, described second obtains submodule comprises:
Acquiring unit, for by the absolute value of the difference of described target voltage and described current voltage divided by described adjustable voltage thresholding, obtain described adjusting number of times;
Determining unit, for using the integer that is more than or equal to described adjusting frequency threshold value as described adjusting number of times, and determines each corresponding regulation voltage that regulates according to described adjusting number of times.
10. a network equipment, is characterized in that, comprises the current-sharing power supply voltage regulating device described in claim 6-9 any one.
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