CN113612389B - Current sharing control system and method, multi-power supply system and integrated circuit - Google Patents

Current sharing control system and method, multi-power supply system and integrated circuit Download PDF

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Publication number
CN113612389B
CN113612389B CN202110729492.8A CN202110729492A CN113612389B CN 113612389 B CN113612389 B CN 113612389B CN 202110729492 A CN202110729492 A CN 202110729492A CN 113612389 B CN113612389 B CN 113612389B
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mos tube
current
voltage
action
current sharing
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CN113612389A (en
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李卓鸣
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Suzhou Inspur Intelligent Technology Co Ltd
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Suzhou Inspur Intelligent Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure

Abstract

The application discloses a current sharing control system, a current sharing control method, a multi-power supply system and an integrated circuit, wherein the current sharing control system comprises a plurality of current sharing modules, and each current sharing module comprises a first MOS tube, a second MOS tube, an output inductor, an action MOS tube, a voltage sampling circuit and a controller; the voltage sampling circuit is used for sampling the voltage between the first end and the second end of the action MOS tube and sending the voltage to the controller; the controller is used for judging whether the voltage exceeds the normal working condition so as to determine whether to disconnect the action MOS tube. According to the method, conventional voltage sampling is achieved through the action MOS tube, and the voltage of the action MOS tube is judged to exceed the normal working condition by the controller to be disconnected, so that the power supply source and other circuits which work abnormally are isolated, the power supply source and the load circuit which work normally are not affected, and powerful technical support is provided for multi-power supply.

Description

Current sharing control system and method, multi-power supply system and integrated circuit
Technical Field
The present invention relates to the field of system power management, and in particular, to a current sharing control system, a current sharing control method, a multi-power supply system, and an integrated circuit.
Background
With the continuous development of server components, each component requires smaller and smaller voltage amplitude and larger current of a power supply. Meanwhile, the requirements of complex equipment such as a server and the like on continuous power supply, reliability, safety and power consumption of a power supply system are higher and higher. The safety and reliability of the power supply of a single power supply cannot be ensured, so that a parallel redundancy scheme of the power supply is generated.
In the parallel redundancy scheme, a plurality of power supplies are connected in parallel and output current to the same load at the same time, so that the parallel power supplies are controlled in a current sharing mode to ensure uniform output of load power and ensure the reliability of power supply.
The common current sharing control method comprises a passive current sharing method and an active current sharing method, wherein the passive current sharing method realizes negative feedback adjustment of current through a series resistor, the method cannot be applied to a load with small voltage fluctuation, and the power consumption of the series resistor can influence the power supply efficiency; the active current sharing method comprises a master-slave current sharing method and an automatic current sharing method, wherein the master-slave current sharing method is limited by a master module, and if the master module fails, the whole parallel power supply system fails, so that the reliability is insufficient; the reliability of the automatic current equalizing method depends on additionally added switches, fault identification circuits, judging circuits and switch switching circuits, and the automatic current equalizing method is complex in design and high in cost.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a current sharing control system and method, a multi-power supply system and an integrated circuit with good current sharing effect, simple circuit structure and high reliability. The specific scheme is as follows:
the utility model provides a current sharing control system, includes a plurality of current sharing modules, every current sharing module includes first MOS pipe, second MOS pipe, output inductance, action MOS pipe, voltage sampling circuit and controller, wherein:
the control end of the action MOS tube, the control end of the first MOS tube and the control end of the second MOS tube are all connected with the controller;
the first end of the first MOS tube is connected with a corresponding power supply, the second end of the first MOS tube is connected with the first end of the second MOS tube and the first end of the output inductor, the second end of the second MOS tube is grounded, the second end of the output inductor is connected with the first end of the action MOS tube, and the second end of the action MOS tube is used as a voltage output end of the current equalizing module;
the voltage sampling circuit is used for sampling the voltage between the first end and the second end of the action MOS tube and sending the voltage to the controller;
the controller is used for judging whether the voltage exceeds the normal working condition so as to determine whether to disconnect the action MOS tube.
Preferably, the controller is further configured to:
and determining the current of the action MOS tube according to the voltage and the on-resistance of the action MOS tube.
Preferably, the process of determining whether the voltage exceeds a normal operating condition to determine whether to disconnect the action MOS transistor includes:
judging whether the voltage and the current exceed normal working conditions or not;
if yes, the action MOS tube is disconnected.
Preferably, the normal operating conditions include:
the voltage is within a preset voltage range and the current is within a preset current range;
the preset current range is specifically a current range determined according to the minimum percentage and the maximum percentage of the average value of the currents of all the current sharing modules.
Preferably, the controller is further configured to:
acquiring the currents of other current sharing modules and calculating an average value;
and adjusting the control signals of the first MOS tube and/or the second MOS tube according to the average value.
Preferably, the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the average value includes:
and adjusting control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
Preferably, the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the magnitude relation between the average value and the current of the local current sharing module includes:
and adjusting the pulse width of the control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
Correspondingly, the application also discloses a current sharing control method which is applied to the controller of the current sharing control system as any one of the above, and the control method comprises the following steps:
acquiring voltage obtained by sampling voltage between a first end and a second end of the action MOS tube by a voltage sampling circuit;
and judging whether the voltage exceeds a normal working condition so as to determine whether to disconnect the action MOS tube.
Correspondingly, the application also discloses a multi-power supply system, which comprises a plurality of power supplies and a current sharing control system as described in any one of the above.
Accordingly, the application also discloses an integrated circuit comprising the current sharing control system as claimed in any one of the above.
The application discloses a current sharing control system, which comprises a plurality of current sharing modules, wherein each current sharing module comprises a first MOS tube, a second MOS tube, an output inductor, an action MOS tube, a voltage sampling circuit and a controller; the voltage sampling circuit is used for sampling the voltage between the first end and the second end of the action MOS tube and sending the voltage to the controller; the controller is used for judging whether the voltage exceeds the normal working condition so as to determine whether to disconnect the action MOS tube. According to the method, conventional voltage sampling is achieved through the action MOS tube, and the voltage of the action MOS tube is judged to exceed the normal working condition by the controller to be disconnected, so that the power supply source and other circuits which work abnormally are isolated, the power supply source and the load circuit which work normally are not affected, and powerful technical support is provided for multi-power supply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a structural diagram of a current sharing control system according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating steps of a current sharing control method according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The common current sharing control method comprises a passive current sharing method and an active current sharing method, wherein the passive current sharing method realizes negative feedback adjustment of current through a series resistor, the method cannot be applied to a load with small voltage fluctuation, and the power consumption of the series resistor can influence the power supply efficiency; the active current sharing method comprises a master-slave current sharing method and an automatic current sharing method, wherein the master-slave current sharing method is limited by a master module, and if the master module fails, the whole parallel power supply system fails, so that the reliability is insufficient; the reliability of the automatic current equalizing method depends on additionally added switches, fault identification circuits, judging circuits and switch switching circuits, and the automatic current equalizing method is complex in design and high in cost.
According to the method, conventional voltage sampling is achieved through the action MOS tube, and the voltage of the action MOS tube is judged to exceed the normal working condition by the controller to be disconnected, so that the power supply source and other circuits which work abnormally are isolated, the power supply source and the load circuit which work normally are not affected, and powerful technical support is provided for multi-power supply.
The embodiment of the invention discloses a current sharing control system, which is shown in fig. 1 and comprises a plurality of current sharing modules 1, wherein each current sharing module 1 comprises a first MOS tube M1, a second MOS tube M2, an output inductor L, an action MOS tube M-V, a voltage sampling circuit 11 and a controller 12, wherein:
the control end of the action MOS tube M-V, the control end of the first MOS tube M1 and the control end of the second MOS tube M2 are all connected with the controller 12;
the first end of the first MOS tube M1 is connected with a corresponding power supply V-in, the first end of the first MOS tube M1 is connected with the first end of the second MOS tube M2 and the first end of the output inductor L, the second end of the second MOS tube M2 is grounded, the second end of the output inductor L is connected with the first end of the action MOS tube M-V, and the second end of the action MOS tube M-V is used as a voltage output end V-out of the current equalizing module 1;
the voltage sampling circuit 11 is used for sampling the voltage between the first end and the second end of the action MOS tube M-V and sending the voltage to the controller 12;
the controller 12 is configured to determine whether the voltage exceeds a normal operating condition to determine whether to turn off the motion MOS transistor M-V.
It can be understood that in this embodiment, since the on-resistance RDSon exists when the motion MOS tube M-V is turned on, the original series resistance can be replaced, so that the voltage of the motion MOS tube M-V can be collected and the working state of the whole current sharing module 1 can be judged according to the voltage.
Specifically, the controller 12 is further configured to:
and determining the current of the action MOS tube M-V according to the voltage and the on-resistance RDSon of the action MOS tube M-V.
Further, the process performed by the controller 12 to determine whether the voltage exceeds the normal operating condition to determine whether to turn off the motion MOS transistor M-V includes:
judging whether the voltage and the current exceed normal working conditions;
if yes, the action MOS tube M-V is disconnected.
Wherein, normal operating conditions include:
the voltage is within a preset voltage range and the current is within a preset current range;
the preset current range is specifically a current range determined according to the minimum percentage and the maximum percentage of the average value of the currents of all the current sharing modules 1.
Specifically, the operating conditions beyond the normal operating conditions include an overvoltage condition and an undervoltage condition, for example, assuming a preset voltage range of [80% ] v 0 ，120％*v 0 ]The preset current range of the current is [50% ] I 0 ，130％*I 0 ]At this time, the overvoltage state is a state where both the voltage and the current are upwardly exceeding their respective ranges, and the undervoltage state is a state where both are downwardly exceeding their ranges.
It can be understood that once the normal working condition is exceeded, the action MOS tube M-V is disconnected, namely the output of the current sharing module 1 is disconnected, the output inductor L is prevented from continuously supplying power to the rear end load connected with the voltage output end V-out, the voltage output end V-out is rapidly powered down, meanwhile, the current sharing module 1 is isolated, and the influence on the normal work of other current sharing modules 1 and the rear end load is avoided.
In some particular embodiments, the controller 12 is further configured to:
acquiring the current of other current sharing modules 1 and calculating an average value;
and adjusting control signals of the first MOS tube M1 and/or the second MOS tube M2 according to the average value.
Further, the controller 12 executes a process of adjusting the control signal of the first MOS transistor M1 and/or the second MOS transistor M2 according to the average value, including:
and adjusting control signals of the first MOS tube M1 and/or the second MOS tube M2 according to the magnitude relation between the average value and the current of the local current equalizing module 1.
Specifically, according to the relation between the average value and the current of the local current sharing module 1, the pulse width of the control signal of the first MOS transistor M1 and/or the second MOS transistor M2 is adjusted.
It can be understood that the controller 12 controls the first MOS transistor M1, the second MOS transistor M2, and the motion MOS transistor M-V by pulse signals, and the pulse signals are generated by the PWM generator. The controller 12 continuously compares the average value with the sampled current through the comparator, and if the sampled current is greater than the comparison value, the pulse width of the control signal of the first MOS tube M1 and/or the second MOS tube M2 is reduced, so that the output current is reduced; if the sampled current is smaller than the comparison value, the pulse width of the control signal of the first MOS tube M1 and/or the second MOS tube M2 is increased, so that the output current is increased. And finally, dynamic current sharing of all current sharing modules 1 is realized.
Correspondingly, the embodiment of the application also discloses a current sharing control method, which is applied to the controller of the current sharing control system as described in any one of the above, and is shown in fig. 2, wherein the control method comprises the following steps:
s1: acquiring voltage obtained by sampling voltage between a first end and a second end of the action MOS tube by a voltage sampling circuit;
s2: and judging whether the voltage exceeds the normal working condition so as to determine whether to disconnect the action MOS tube.
According to the method, conventional voltage sampling is achieved through the action MOS tube, and the voltage of the action MOS tube is judged to exceed the normal working condition by the controller to be disconnected, so that the power supply source and other circuits which work abnormally are isolated, the power supply source and the load circuit which work normally are not affected, and powerful technical support is provided for multi-power supply.
In some specific embodiments, the control method further comprises:
and determining the current of the action MOS tube according to the voltage and the on-resistance of the action MOS tube.
In some specific embodiments, the determining whether the voltage exceeds a normal operating condition to determine whether to disconnect the action MOS transistor specifically includes:
judging whether the voltage and the current exceed normal working conditions or not;
if yes, the action MOS tube is disconnected.
In some specific embodiments, the normal operating conditions include:
the voltage is within a preset voltage range and the current is within a preset current range;
the preset current range is specifically a current range determined according to the minimum percentage and the maximum percentage of the average value of the currents of all the current sharing modules.
In some specific embodiments, the control method further comprises:
acquiring the currents of other current sharing modules and calculating an average value;
and adjusting the control signals of the first MOS tube and/or the second MOS tube according to the average value.
In some specific embodiments, the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the average value specifically includes:
and adjusting control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
In some specific embodiments, the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the magnitude relation between the average value and the current of the local current sharing module specifically includes:
and adjusting the pulse width of the control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
Correspondingly, the embodiment of the application also discloses a multi-power supply system which comprises a plurality of power supplies, and the current sharing control system is as described in any embodiment.
Accordingly, the embodiment of the application also discloses an integrated circuit, which comprises the current sharing control system according to any embodiment.
It can be appreciated that, for details of the current sharing control system in this embodiment, reference may be made to the related content in the above embodiment, which is not described herein.
The multi-power supply system and the integrated circuit in this embodiment have the same technical effects as those of the current sharing control system in the above embodiment, and will not be described here again.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The current sharing control system, the method, the multi-power supply system and the integrated circuit provided by the invention are described in detail, and specific examples are applied to illustrate the principles and the implementation modes of the invention, and the description of the above examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (8)

1. The utility model provides a current sharing control system, its characterized in that includes a plurality of current sharing modules, every current sharing module includes first MOS pipe, second MOS pipe, output inductance, action MOS pipe, voltage sampling circuit and controller, wherein:
the control end of the action MOS tube, the control end of the first MOS tube and the control end of the second MOS tube are all connected with the controller;
the first end of the first MOS tube is connected with a corresponding power supply, the second end of the first MOS tube is connected with the first end of the second MOS tube and the first end of the output inductor, the second end of the second MOS tube is grounded, the second end of the output inductor is connected with the first end of the action MOS tube, and the second end of the action MOS tube is used as a voltage output end of the current equalizing module;
the voltage sampling circuit is used for sampling the voltage between the first end and the second end of the action MOS tube and sending the voltage to the controller;
the controller is used for judging whether the voltage exceeds a normal working condition or not so as to determine whether to disconnect the action MOS tube or not;
the controller is further configured to:
determining the current of the action MOS tube according to the voltage and the on-resistance of the action MOS tube;
the process of judging whether the voltage exceeds the normal working condition to determine whether to disconnect the action MOS tube comprises the following steps:
judging whether the voltage and the current exceed normal working conditions or not;
if yes, the action MOS tube is disconnected.
2. The current sharing control system of claim 1, wherein the normal operating conditions comprise:
the voltage is within a preset voltage range and the current is within a preset current range;
the preset current range is specifically a current range determined according to the minimum percentage and the maximum percentage of the average value of the currents of all the current sharing modules.
3. The current sharing control system of claim 1 or 2, wherein the controller is further configured to:
acquiring the currents of other current sharing modules and calculating an average value;
and adjusting the control signals of the first MOS tube and/or the second MOS tube according to the average value.
4. The current sharing control system according to claim 3, wherein the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the average value includes:
and adjusting control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
5. The current sharing control system according to claim 4, wherein the process of adjusting the control signal of the first MOS transistor and/or the second MOS transistor according to the magnitude relation between the average value and the current of the local current sharing module includes:
and adjusting the pulse width of the control signals of the first MOS tube and/or the second MOS tube according to the magnitude relation between the average value and the current of the local current equalizing module.
6. A current sharing control method, characterized in that it is applied to the controller of the current sharing control system according to any one of claims 1 to 5, comprising:
acquiring voltage obtained by sampling voltage between a first end and a second end of the action MOS tube by a voltage sampling circuit;
judging whether the voltage exceeds a normal working condition or not to determine whether to disconnect the action MOS tube or not;
the current sharing control method further comprises the following steps:
determining the current of the action MOS tube according to the voltage and the on-resistance of the action MOS tube;
the process of judging whether the voltage exceeds the normal working condition to determine whether to disconnect the action MOS tube comprises the following steps:
judging whether the voltage and the current exceed normal working conditions or not;
if yes, the action MOS tube is disconnected.
7. A multi-power supply system comprising a plurality of power supplies, a current sharing control system according to any one of claims 1 to 5.
8. An integrated circuit comprising a current sharing control system as claimed in any one of claims 1 to 5.
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CN103580450B (en) * 2012-07-20 2017-03-29 中兴通讯股份有限公司 A kind of circuit for realizing parallel electric source module automatic current equalizing in proportion
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