CN105580261A - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN105580261A CN105580261A CN201480052330.3A CN201480052330A CN105580261A CN 105580261 A CN105580261 A CN 105580261A CN 201480052330 A CN201480052330 A CN 201480052330A CN 105580261 A CN105580261 A CN 105580261A
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- output voltage
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- power
- supply system
- output
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Classifications
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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
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- 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
Abstract
This power supply system is equipped with multiple power supply devices, input parts and output parts of which are respectively connected parallel to one another, wherein each power supply device is equipped with a converter unit that performs power conversion, a constant-voltage control unit that controls an output voltage of the power supply device to be constant in accordance with a result of comparison between the output voltage of the converter unit and a reference target value, an output current detection unit that detects the output voltage, a droop characteristic generation unit that causes the output voltage to be reduced with an increase in an output current, a serial communication unit that performs serial communication with communication counterpart power supply devices, and an output voltage changing unit that changes the output voltage in response to an output voltage correction command value. At least one of the multiple power supply devices is equipped with an output voltage correction command unit that calculates the output voltage correction command value and sends the output voltage correction command value to the communication counterpart power supply devices through the serial communication unit. The multiple power supply devices operate in parallel in a well-balanced manner with a small data communication amount and without the need for any special terminals and signal lines for current balancing.
Description
Technical field
The present invention relates to and possess multiple supply unit, and the power-supply system that the input part of these supply units and efferent are connected in parallel respectively.
Background technology
Turn to object with high output or the tediously long of circuit, multiple supply unit to be connected in parallel and the power-supply system formed is utilized.When using multiple supply unit, importantly provide electric power from each supply unit equably to load.Such as, in patent documentation 1, illustrate and current balance type terminal is set at each supply unit, utilize current balance type line to be interconnected by these current balance type terminals, thus balance control is carried out to output current.In patent documentation 2, illustrate each supply unit detect output voltage and adjust reference voltage, and to supply unit give instruction thus the output voltage of the power circuit part making output voltage different from reference voltage and reference voltage unanimously, to make in parallel running from the electric current not disequilibrium that each supply unit provides.In addition, in patent documentation 3, illustrate and each supply unit is had along with output current becomes large and described output voltage characteristic, i.e. sagging (DROOP) characteristic of diminishing, by each supply unit parallel running, thus share the output current to common load.
At first technical literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2007-143292 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2009-159692 publication
Patent documentation 3: Japanese Unexamined Patent Publication 8-289468 publication
Summary of the invention
-problem that invention will solve-
As Patent Document 1, the current balance type terminal that to export output current information and input is being set and is connecting, each supply unit carries out controlling in the gimmick of the electric current making to become the signal being equivalent to its terminal, needs special current balance type terminal, and number of terminals increases.In addition, misoperation is caused also to become problem because current balance type line is subject to noise.
As shown in patent documentation 2, given in the gimmick of the instruction making the output voltage of supply unit consistent with reference voltage in suitable timing by data communication, because multiple supply unit is received and dispatched mutually, the data volume of the entirety therefore transmitted in order wire becomes the data volume of expanding.
As shown in patent documentation 3, each supply unit is had in the gimmick of droop characteristic output voltage being reduced along with the increase of output current, and output voltage changes according to output current.That is, load regulation (load-regulation) characteristic reduces.In addition, when changing output voltage, if produce deviation in the change timing of output voltage, electric current can not balance, and produces the phenomenon flowing through larger current in a supply unit.
The object of the invention is to, a kind of power-supply system is provided, to make the special terminal or the holding wire that there is no need for current balance type, and can with the parallel running evenly of less data traffic.In addition, providing a kind of when utilizing droop characteristic to share the output current of each supply unit, also being kept the power-supply system of load regulation characteristic by the reduction compensated based on the output voltage of droop characteristic well.
-solve problem means-
Power-supply system of the present invention possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, it is characterized in that,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of reference voltage by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Increase along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the output voltage changing unit changing output voltage according to output voltage revision directive value,
At least one supply unit among described multiple supply unit possesses output voltage revision directive portion, this output voltage revision directive portion calculates described output voltage revision directive value, provides described output voltage revision directive value by described Department of Communication Force to the supply unit of described communication object.
In addition, power-supply system of the present invention possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, it is characterized in that,
Possess output voltage revision directive portion, this output voltage revision directive portion calculates output voltage revision directive value, and provides described output voltage revision directive value to described multiple supply unit,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of reference voltage by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the output voltage changing unit changing output voltage according to described output voltage revision directive value.
In addition, power-supply system of the present invention possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, it is characterized in that,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of desired value by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the desired value changing unit changing described desired value according to output voltage alteration command value,
At least one supply unit among described multiple supply unit possesses output voltage alteration command portion, and this output voltage alteration command portion provides described output voltage alteration command value by described Department of Communication Force simultaneously to other supply units be connected in parallel,
The described desired value changing unit of the described described supply unit that is connected in parallel and other supply units described, after the sign off of described output voltage alteration command value, changes described desired value simultaneously.
In addition, power-supply system of the present invention possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, it is characterized in that,
Possess output voltage alteration command portion, this output voltage alteration command portion provides output voltage alteration command value to described multiple supply unit,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of desired value by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the desired value changing unit changing described desired value according to described output voltage alteration command value,
Described output voltage alteration command portion provides described output voltage alteration command value by described Department of Communication Force simultaneously to described multiple supply unit,
The described desired value changing unit of described multiple supply unit, after the sign off of described output voltage alteration command value, changes described desired value simultaneously.
According to above-mentioned formation, the special terminal or the holding wire that there is no need for current balance type can be configured to, with the power-supply system of less data traffic parallel running evenly.
Described output voltage revision directive portion or the choosing of described output voltage alteration command quality award from the ministry are configured to by setting described output voltage revision directive value or described output voltage alteration command value, increase to make the output voltage of supply unit become large along with output current, compensate the reduction of the output voltage that droop characteristic generating unit causes thus.
According to above-mentioned formation, can the load regulation characteristic of power-supply system do not reduced, in addition, when not setting current balance type terminal, make output current impartial.
Above-mentioned power-supply system possesses output electric current measure portion, this output electric current measure portion detects or obtains the output current of supply unit or the output current of power-supply system, described output voltage revision directive portion or described output voltage alteration command portion are preferably by the described output voltage revision directive value of setting or described output voltage alteration command value, increase to make the output voltage of described supply unit become large along with described output current, compensate the reduction of the output voltage that described droop characteristic generating unit causes thus.By this formation, output voltage revision directive value or output voltage alteration command value can be set with less operand.
Possess the output voltage test section of the output voltage detecting described power-supply system, output voltage is set to controlled quentity controlled variable, output voltage revision directive value or output voltage alteration command value is set to operational ton to carry out FEEDBACK CONTROL by described output voltage revision directive portion or the choosing of described output voltage alteration command quality award from the ministry.By this formation, output voltage can be controlled accurately.
Described output voltage revision directive portion or output voltage alteration command portion produce output voltage revision directive value or output voltage alteration command value preferably by the DA conversion of shaking or PWM.By this formation, the change of output voltage can be carried out with high-resolution.In addition, when the PWM ripple shaken, and only generate PWM ripple, smoothly obtain direct voltage by making it and compare, more can shorten the cycle of PWM, suppress the reduction of the response based on smoothing filter.
-invention effect-
According to the present invention, a kind of special terminal or the holding wire that there is no need for current balance type can be formed, and can with the power-supply system of less data traffic parallel running evenly.In addition, can output voltage be revised, compensate the reduction of the output voltage that droop characteristic generating unit causes, and load regulation characteristic can be kept well thus.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the power-supply system involved by the 1st execution mode.
Fig. 2 represents the figure of output voltage relative to the relation of the output current from power subsystem.
Fig. 3 is the figure of the relation representing output voltage alteration command value Δ Vref and droop characteristic.
Fig. 4 be using as main equipment using carry out action controller 10A and as the figure carrying out to the circuit in each controller carrying out the controller 10B of action or functional block graphing representing from equipment.
Fig. 5 is the circuit diagram of the power-supply system involved by the 2nd execution mode.
Fig. 6 be using as main equipment using carry out action controller 10A and as the figure carrying out to the circuit in each controller carrying out the controller 10B of action or functional block graphing representing from equipment.
Fig. 7 is the circuit diagram of the power-supply system involved by the 3rd execution mode.
Fig. 8 is the block diagram of the power-supply system involved by the 4th execution mode.
Fig. 9 is the circuit diagram of the power subsystem 100 that power-supply system possesses.
Figure 10 (A), Figure 10 (B) are the figure of the formation of the desired value changing unit represented involved by the 5th execution mode.
Figure 11 is the figure of the formation representing the voltage signal produced the desired value that the desired value changing unit involved by the 6th execution mode is given.
Figure 12 is the oscillogram of the realization example of shake (dithering) PWM represented based on controller 10.
Figure 13 is the figure of the relation representing output voltage Vo and PWM duty ratio (duty).
Figure 14 is the oscillogram in each portion of power-supply system involved by Fig. 7 execution mode.
Figure 15, by the enlarged drawing of the part of the dotted line shown in Figure 14, is the figure representing the oscillogram of clock signal and data-signal and the bag (packet) of data.
Embodiment
Below, reference accompanying drawing also enumerates several concrete example, represents for implementing multiple mode of the present invention.In the drawings and in which, prosign is given to same position.Each execution mode is example, certainly can carry out aliquot replacement or the combination of the formation represented in different execution modes.
" the 1st execution mode "
Fig. 1 is the circuit diagram of the power-supply system involved by the 1st execution mode.This power-supply system 201 possesses multiple supply unit unit (hreinafter referred to as " unit ") 100A, 100B ..., and be configured to its input part and efferent is connected in parallel respectively.In FIG, the diagram of the 3rd later unit is omitted.Unit 100A, 100B ... be substantially identical formation respectively, but in this example, unit 100A carries out action as main equipment, other unit 100B etc. are as carrying out action from equipment.
If for unit 100A, unit 100A possesses: converter unit 1, PWM control part 2, controller 10A, output voltage detecting circuit 3, output current detection circuit 5, sagging generative circuit 6 and add circuit 7.Converter unit 1 possesses: switch element Q1, diode D1, inductor L1 and capacitor C1, form uninsulated step-down controller circuit.PWM control part 2 possesses: error amplifier OPAMP1, PWM comparator CMP1, triangular wave generating circuit 21.
Output voltage detecting circuit 3 is the bleeder circuits comprising resistance R1, R0.The output voltage of error amplifier OPAMP1 to desired value Vr and output voltage detecting circuit 3 compares, and error voltage is supplied to the positive terminal of PWM comparator CMP1.Error amplifier OPAMP1 inverting input be connected capacitor C2 and resistance R2 between output.This circuit works as the phase compensating circuit preventing vibrating for control system.
Triangular wave generating circuit 21 produces the triangular signal of PWM, and provides it to the inverting terminal of PWM comparator CMP1.The input voltage that PWM comparator CMP1 is inputted by subtend positive terminal and triangular signal compare and PWM modulation signal are supplied to switch element Q1.PWM control part 2 is equivalent to " constant voltage control part " involved in the present invention.
The output current Io of sagging generative circuit 6 couples of unit 100A detects, be the circuit generating sagging correction value Δ Vo, this sagging correction value Δ Vo becomes large along with output current Io for making it have and reduces voltage-current characteristic, the i.e. droop characteristic of output voltage.The output voltage revision directive value Vmod exported from controller 10A is added with datum target value Vref by add circuit 7, and deducts above-mentioned sagging correction value Δ Vo, decides desired value Vr.This desired value Vr is provided to the normal phase input end of error amplifier OPAMP1.
Controller 10A is made up of microcontroller unit MCU.Controller 10A calculates output voltage revision directive value Vmod.Controller 10A and add circuit 7 are equivalent to " output voltage changing unit " involved in the present invention.
Switch element Q1 is controlled by the above-mentioned signal crossed by PWM.During the connection of switch element Q1, exciting current flows through inductor L1, at off period, by diode D1, flows through back flow current.
Controller 10A, via universal serial bus 4, transmits output voltage revision directive value Vmod to the controller (10B etc.) of the unit of communication object.Controller 10A is equivalent in " output voltage revision directive portion " involved in the present invention.
Fig. 2 represents the figure of output voltage relative to the relation of the output current from unit.Solid line is controller 10A determined output voltage revision directive value Vmod when being certain value, based on the characteristic of the effect of sagging generative circuit 6.That is, output current Io more increases, and output voltage Vo reduces with constant gradient.If controller 10A determined output voltage revision directive value Vmod increases and decreases, be then accompanied by this, as shown with a dotted line in fig. 2, represent that the line of above-mentioned droop characteristic moves Δ Vc at above-below direction with keeping constant inclination degree.That is, the gradient of droop characteristic does not change itself, and the output level change at the output current place of regulation.Above-mentioned Δ Vc is the ratio value of output voltage revision directive value Vmod.
Fig. 3 is the figure of the relation representing above-mentioned output voltage revision directive value Vmod and droop characteristic.Above-mentioned output voltage revision directive value Vmod is set as that this voltage rise is offset with the voltage drop based on droop characteristic.That is, output current Io more increases, and more increases above-mentioned output voltage revision directive value Vmod, in figure 3, as shown in the dotted line of voltage constant, be set to output current independently, output voltage is constant.By table or functional expression, the relation of Vmod=aIo is set in controller relative to the above-mentioned output voltage revision directive value Vmod of this output current.
Fig. 4 be represent using as main equipment using carry out action controller 10A and as the figure carrying out to the circuit in each controller carrying out the controller 10B of action or functional block graphing representing from equipment.In controller 10A, AD converter 13 input represents the voltage signal of the size of output current Io and is transformed to numerical data.Table 14, based on the value obtained by AD converter 13, generates output voltage revision directive value Vmod.In addition, this output voltage revision directive value Vmod as data, is sent to other controllers (10B etc.) via universal serial bus 4 by serial communication portion 12.Output voltage revision directive value Vmod is transformed to voltage signal and outputs to the add circuit 7 in unit 100A by D/A converter 11.
In controller 10B, serial communication portion 12 receives above-mentioned output voltage revision directive value Vmod via universal serial bus 4, and output voltage revision directive value Vmod is transformed to voltage signal and outputs to the add circuit 7 in unit 100B by D/A converter 11.
Controller 10A in order to correspond to the variation of output current Io, regularly or repeatedly carry out the detection of output current Io, the calculating of output voltage revision directive value Vmod and the instruction based on serial communication intermittently.
As shown above, the change of output voltage is not that each controller in unit carries out, but other controllers of controller instruction.That is, a controller among multiple controller is the main equipment of the instruction carrying out the change of output voltage to other controllers.Main equipment comes to send output voltage revision directive value Vmod to from equipment by serial communication, and what receive command value changes output voltage from equipment based on command value Vmod.Meanwhile, main equipment also with in the same manner as equipment changes output voltage.If use broadcast transmission (sending simultaneously) when the instruction of above-mentioned output voltage revision directive value Vmod, then can the multiple controller of instruction simultaneously.In addition, by applying error detection or error correction in serial communication, the mistake based on noise can be reduced.
Like this, by carrying out the change of output voltage at all power unit simultaneously, thus all unit becomes the droop characteristic of same tilt degree and same level.Thus, the output current balance of each unit.
In addition, although according to the variation of output current Io, based on droop characteristic, output voltage Vo changes, and by the correction of above-mentioned output voltage revision directive value Vmod part, the variation of output voltage Vo is cancelled.
According to the present embodiment, the load regulation characteristic of power-supply system can not be reduced, current balance type terminal is not set in addition, just make output current impartial.In addition, owing to having from main equipment to the one-way communication from equipment, therefore the load of communication line and Control on Communication is less.
In addition, above-mentioned " output current " also can be any of the output current of the unit 100A of main equipment or the output current of power-supply system 201 entirety.The output current of power-supply system 201 entirety to be obtained via serial communication by each power subsystem to utilize controller and the output current detected, and added up to obtain.
In the present embodiment, in order to change output voltage, be configured to change the desired value Vr carrying out PWM, but also can control output voltage detecting circuit 3 side.Such as, also via resistance, the normal phase input end of D/A converter with error amplifier OPAMP1 can be connected, and provide control signal to it.
" the 2nd execution mode "
Fig. 5 is the circuit diagram of the power-supply system involved by the 2nd execution mode.This power-supply system 202 is different from the 1st execution mode, and the controller 10A of main equipment does not detect output current, and detects output voltage.Power subsystem 100A possesses output voltage detecting circuit 8.The detection signal of controller 10A input and output voltage testing circuit 8.Function about controller 10A is as follows.Other formation is identical with the 1st execution mode.
Fig. 6 be using as main equipment using carry out action controller 10A and as the figure represented to the circuit in each controller carrying out the controller 10B of action or functional block graphing from equipment.In controller 10A, AD converter 13 input represents the voltage signal of the size of output voltage Vo and is transformed to numerical data.Difference (output voltage error) ev of target output value Vo_ref and output voltage Vo asked for by add circuit 15.Phase compensating circuit 16, based on this output voltage error ev, generates output voltage revision directive value Vmod.In addition, serial communication portion 12 sends this output voltage revision directive value Vmod to other controllers (10B etc.) as data.Output voltage revision directive value Vmod is transformed to voltage signal and outputs to the add circuit 7 in unit 100A by D/A converter 11.
In controller 10B, serial communication portion 12 receives above-mentioned output voltage revision directive value Vmod via universal serial bus, and output voltage revision directive value Vmod is transformed to voltage signal and outputs to the add circuit 7 in unit 100B by D/A converter 11.
Controller 10A in order to correspond to the variation of output voltage Vo, regularly or repeatedly carry out the detection of output voltage Vo, the calculating of output voltage revision directive value Vmod and the instruction based on serial communication intermittently.
Above-mentioned phase compensating circuit 16 determines transfer function, so that the FEEDBACK CONTROL of carrying out output voltage Vo being set to controlled quentity controlled variable, described output voltage revision directive value Vmod being set to operational ton.The transfer function of this phase compensating circuit 16 is represented as K (s)=K
p+ K
i/ s+K
ds.Here, K
pthe coefficient of proportional element, K
ithe coefficient of integral element, K
dit is the coefficient of circuit element.Like this, the FEEDBACK CONTROL of PID is preferably carried out (or by K
dbe set to the FEEDBACK CONTROL of the PI of zero).
Neither all carry out the change of output voltage by each controller in unit in this case, but other controllers of controller instruction.That is, a controller among multiple controller is the main equipment of the instruction carrying out the change of output voltage to other controllers.Main equipment sends output voltage revision directive value Vmod by serial communication to from equipment, and what receive command value changes output voltage from equipment based on command value Vmod.Meanwhile, main equipment also with in the same manner as equipment changes output voltage.If use broadcast transmission when the instruction of above-mentioned output voltage revision directive value Vmod, then can send instruction to multiple controller simultaneously.In addition, by applying error detection or error correction in serial communication, the mistake based on noise can be reduced.
Like this, by carrying out output voltage increase at all power unit simultaneously, thus all unit becomes the droop characteristic of same tilt degree and same level.Thus, the output current balance of each unit.
In addition, although according to the variation of output current Io, by droop characteristic, output voltage Vo changes, and by above-mentioned FEEDBACK CONTROL, output voltage Vo is stabilized.
According to the present embodiment, because output voltage is carried out FEEDBACK CONTROL, therefore, it is possible to improve the precision of output voltage.
" the 3rd execution mode "
Fig. 7 is the circuit diagram of the power-supply system involved by the 3rd execution mode.This power-supply system 203 is different from the 1/ 2nd execution mode, except power subsystem 100A, 100B, also possesses peripheral control unit 20.In addition, the output current detection circuit 9 that the output current Io of power-supply system 203 is detected is possessed.The formation of this peripheral control unit 20 is the formations removing D/A converter 11 from the controller 10A shown in Fig. 4.The detected value of the output current of peripheral control unit 20 input power system 203, carries out the action same with the controller 10A shown in the 1st execution mode.Like this, also controller can be arranged on the outside of unit.
In addition, also the power-supply system shown in the 2nd execution mode can be applied to by this controller being arranged at outside mode.That is, the peripheral control unit in this situation is the structure removing D/A converter 11 from the controller 10A shown in Fig. 6.The detected value of this peripheral control unit input and output voltage, carries out the action same with the controller 10A shown in the 2nd execution mode.
" the 4th execution mode "
Fig. 8 is the block diagram of the power-supply system involved by the 4th execution mode.This power-supply system 204 possesses multiple power subsystem 100, and the input part and the efferent that are configured to these power subsystems are connected in parallel respectively.Each power subsystem 100 possesses converter unit and controller 10.The basic comprising of each power subsystem 100 is identical, but the controller 10 of a power subsystem carries out action as main equipment, and the controller 10 of other power subsystems carries out action as from equipment.
In the present embodiment, send output voltage alteration command value Δ Vref via universal serial bus 41 to the controller 10 carrying out action as main equipment from load, the controller 10 carrying out action as main equipment sends output voltage alteration command value Δ Vref via universal serial bus 42 to as the multiple controllers 10 carrying out action from equipment.
Fig. 9 is the circuit diagram of the power subsystem 100 that above-mentioned power-supply system 204 possesses.The power-supply system of present embodiment is not reduced to object with what compensate output voltage that droop characteristic generating unit causes, and can be changed the power-supply system of output voltage by instruction.In the present embodiment, output voltage alteration command value Δ Vref is the value from controller 10 instruction of load or other power subsystems in Fig. 8, is not the output voltage alteration command value of the object of the reduction compensating the output voltage that droop characteristic generating unit causes.It is the value for output voltage being set in arbitrarily in prescribed limit.
Desired value amount of change Δ Va is supplied to desired value changing unit by controller 10, and output voltage alteration command value Δ Vref is added with the correction value Vmod of reduction and the correction value Vcal that calibrates compensating the output voltage that droop characteristic generating unit causes the value obtained by this desired value amount of change Δ Va.Thus, output voltage is changed.In addition, the correction value Vcal of calibration is the precision changed to improve output voltage further, the value be written in the factory when dispatching from the factory.
" the 5th execution mode "
In the 5th execution mode, represent other configuration examples that desired value is provided to desired value changing unit.
Figure 10 (A), Figure 10 (B) are the figure of the formation of the desired value changing unit represented involved by the 5th execution mode.In the example of Figure 10 (A), controller 10 exports the desired value added up to by datum target value Vref and output voltage alteration command value Δ Vref to PWM control part 2.In above shown each execution mode, illustrate with analog circuit and change datum target value Vref and the add circuit 7 being set as desired value, but in the present embodiment, in controller 10, carry out this change by digital processing.
In addition, as shown in Figure 9, when also considering sagging correction value Vmod and calibration correction value Vcal, as long as controller 10 carries out the computing of Vref+ Δ Vref+Vmod+Vcal, DA conversion is carried out to its result, and exports the desired value as analog voltage.
In the example of Figure 10 (B), normal phase input end to error amplifier OPAMP1 applies reference voltage, to the detection signal of inverting input input and output voltage testing circuit 3, and via resistance, to the inversion signal of the input voltage superposition desired value to this inverting input.Like this, the detected value side of output voltage also can be made to change.
In addition, in any formation of Figure 10 (A), Figure 10 (B), also can be set to the formation of the anti-phase input side output voltage of the sagging generative circuit 6 being used for making it have droop characteristic being input to error amplifier OPAMP1.In this case, output voltage change is set to contrary relation relative to the direction of output current change.
" the 6th execution mode "
In the 6th execution mode, represent the configuration example being exported desired value by PWM.
Figure 11 represents the figure producing and be supplied to the formation of the voltage signal of the desired value of desired value changing unit.Controller 10 output shown in Figure 11 is equivalent to the pwm signal of the desired value beyond the sagging correction value for making it have droop characteristic.The smoothing circuit and the buffer circuit B that comprise resistance R and capacitor C is connected at this lead-out terminal.
In order to carry out the change of desired value with high-resolution, need the PWM shown in the DA conversion shown in Figure 10 (A), Figure 10 (B), Figure 11 to be set to high-resolution.But if use high-resolution D/A converter, PWM, then cost uprises.Further, if produced the analog signal of desired value by PWM and smoothing circuit, if then do not increase the cycle of PWM, the voltage resolution specified just can not be guaranteed.Therefore, response worsens.Such as, when least unit is on a timeline 10ns, in order to PWM resolution is set to 10 grades, as the PWM cycle, needing is 100ns, and in order to PWM resolution is set to 100 grades, as the PWM cycle, needing is 1000ns.Due to pwm signal by smoothing filter by smoothly, if therefore the cycle elongated, then correspond to this, the time constant of smoothing filter becomes large, becomes the change can not carrying out output voltage at high speed.
In order to eliminate the problems referred to above, in the present embodiment, produce by the DA that shakes conversion or PWM the signal being equivalent to above-mentioned desired value, and carry out the change of desired value with high-resolution.
Figure 12 is the oscillogram of the example of the shake PWM represented based on controller 10.Here, be the value of the timer conter in controller 10 with " timer conter " of triangle wave change, " period ratio comparatively " is the value compared with the value of timer conter, the value of timer conter reach period ratio compared with value time be eliminated.Thus, the value of timer conter changes repeatedly so that triangle is wavy." duty ratio compares " is the value of comparison other relative to timer conter.In this example, according to the sequential shifts of M → M → M+1 → M+1 → M+1 → N → N+1 → N+1." DMA transmits with memory [1] ~ [5] " represents during DMA (DirectMemoryAccess, direct memory access) transmission is used the value of the memory that can guarantee." timer interruption " is the interrupt signal produced at some cycles, and " DMA interruption " is the interrupt signal transmitted for DMA produced at some cycles.In this example, timer interrupts having the ratio of 1 time to produce with every 5 times." PWM output " is the binary signal of the comparative result of the value that the value of timer conter compares with duty ratio.
The action of the shake PWM of present embodiment is as follows.
Timer conter adds 1 with constant timing always, if more consistent with period ratio, being cleared is zero.
If timer conter is less than duty ratio and compares, then PWM is exported and is set to H (High), if duty ratio relatively more than, then PWM exports as L (Low).That is, by making duty ratio compare the duty ratio changing and change PWM.
If dma controller is cleared as zero with timer conter, the timer produced interrupts, for triggering, the data of preserving in DMA transmission memory [1] ~ [5] being sent to duty ratio successively and comparing.
Dma controller transmit the number (or its integral multiple) of memory by every DMA carries out DMA interruption, upgrades DMA and transmits memory-aided content.
If the integer portion of actual effect duty ratio is expressed as i, fractional part is expressed as d, then the value of preserving in the DMA transmission memory value that to be the ratio of the quantity of i or i+1, i and i+1 be closest to d/10.Such as, when actual effect duty ratio is 15.6, in i=15, d=6, DMA transmission memory, i is saved 2, and i+1 is saved 3.
Figure 13 is the figure of the relation representing output voltage Vo and PWM duty ratio.The relation of this output voltage Vo and PWM duty ratio is preset in table.Such as, be 12.7V at current output voltage Vo, when sagging correction value Δ Vo is 0.3V, in order to compensate the reduction of this sagging caused output voltage, output voltage is set to 13V, and PWM duty ratio is set to 15.6.The action of shake PWM when PWM duty ratio is 15.6 as already indicated.
By utilizing above shown shake PWM to export desired value, thus play following effect.
(1) due to the shake of hardware formation also can be can't help, therefore special hardware is not needed.In addition, can change the shake cycle etc. by software, flexibility is higher.
(2) owing to not needing each PWM process, therefore the process load of CPU is lighter.
(3) if directly shake to be applied to the PWM of the switch controlling signal of T.G Grammar device, the impact of shaking may be there is in the output (voltage or electric current) of then transducer, to this, as mentioned above, when shake is applied to the signal being supplied to PWM control part 2, there is RC filter or control circuit before output due to transducer, the impact of therefore shaking there will not be in the output.
In addition, controller 10 be not limited to produce datum target value Vref is added with output voltage alteration command value Δ Vref the desired value obtained.Such as, the output voltage correction value Vmod shown in Fig. 1, Fig. 5, Fig. 7 can be produced by shake PWM, also can produce the desired value amount of change Δ Va shown in Fig. 9 by shake PWM.
Example above illustrates the example of the high-resolution based on the shake in PWM, but also in D/A converter, similarly can carry out high-resolution by shake.That is, such as, carried out the signal of DA conversion according to the Sequential output of the data M shown in Figure 12 → M → M+1 → M+1 → M+1 → N → N+1 → N+1, by circuit, it is level and smooth.
" Fig. 7 execution mode "
In Fig. 7 execution mode, represent the synchronization action of the controller of each power subsystem.
Figure 14 is the oscillogram in each portion of power-supply system involved by Fig. 7 execution mode.The circuit of power-supply system is formed as shown in Figure 8.Such as, in the power-supply system 204 shown in Fig. 8, the controller 10 carrying out action as main equipment and the load of power subsystem 100 < that carries out communicating to communicate 1>, from load-receipt output voltage alteration command value Δ Vref.This < communication 1> carries out from the controller 10 carrying out action as main equipment with some cycles or regulation timing.This < communicate 1> by from controller 10 to the request of load or from load to the request of controller 10 comes.
Be different from above-mentioned < communication 1>, to be communicated 2> by <, using the constant cycle carry out the instruction of output voltage alteration command value Δ Vref, output open/close instruction, as the acquisition etc. of information of controller 10 carrying out action from equipment.
If to be communicated 2> by <, output voltage alteration command value is provided simultaneously to as the controller 10 carrying out action from equipment from the controller 10 carrying out action as main equipment, then the desired value changing unit of each power subsystem 100 is after the communication (reception) of output voltage alteration command value terminates, and changes desired value simultaneously.Now, comprise and carry out the desired value changing unit of the power subsystem 100 of the controller 10 of action also after the communication of output voltage alteration command value (transmission) terminates as main equipment, change desired value.
In fig. 14, change output voltage alteration command value by the < communication 2> of moment t1, be accompanied by this, at moment t2, output voltage Vo changes.This time lag T1 is after the controller 10 of each power subsystem 100 terminates the communication of output voltage alteration command value, the time required to desired value changing unit changes desired value simultaneously.Because this time is identical for all power unit 100, therefore the output voltage of each power subsystem 100 is changed according to output voltage alteration command value simultaneously.
Figure 15, by the enlarged drawing of the part of the dotted line shown in Figure 14, is the figure representing the oscillogram of above-mentioned clock signal and data-signal and the bag of data.In this example, a series of data (bag) are set up by 5 data bytes.The data 00 of front end are broadcast addressing (generalcalladdress), represent for the order all from equipment.Data 21 are the orders representing the instruction being output voltage change.The code A101 (01A1) of 2 bytes after following closely is values of output voltage alteration command value.Last data 22 are error detection bytes.
Like this, due to according to output voltage alteration command, all power unit 100 is synchronous and output voltage Vo change, therefore, it is possible to the parallel running unchangeably of maintenance current balance type.
" other execution modes "
In above shown each execution mode, illustrate the example that converter unit is uninsulated step-down controller circuit, but converter unit also can be boost converter or type of voltage step-up/down converter.In addition, the insulated type of insulating transformer can be also the use of.
In addition, in each execution mode shown in above, illustrate the example being formed the analogue enlargement of constant voltage control part by the combination of error amplifier and passive component, but also can be set to by MCU to its process digital control.
In addition, in Fig. 1,5,7 etc., the Department of Communication Force illustrating supply unit carries out the example communicated via the bus of many lines, but the line number used in communication also can be single line.In addition, the communication employing universal serial bus is not limited in.
-symbol description-
C1 ... capacitor
CMP1 ... PWM comparator
D1 ... diode
L1 ... inductor
OPAMP1 ... error amplifier
Q1 ... switch element
1 ... converter unit
2 ... PWM control part
3 ... output voltage detecting circuit
4 ... universal serial bus
5 ... output current detection circuit
6 ... sagging generative circuit
7 ... add circuit
8 ... output voltage detecting circuit
9 ... output current detection circuit
10A, 10B ... controller
11 ... D/A converter
12 ... serial communication portion
13 ... AD converter
14 ... table
15 ... add circuit
16 ... phase compensating circuit
20 ... peripheral control unit
21 ... triangular wave generating circuit
41,42 ... universal serial bus
100A, 100B ... power subsystem
201 ~ 204 ... power-supply system
Claims (12)
1. a power-supply system, possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, and the feature of described power-supply system is,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of reference voltage by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Increase along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the output voltage changing unit changing output voltage according to output voltage revision directive value,
At least one supply unit among described multiple supply unit possesses output voltage revision directive portion, this output voltage revision directive portion calculates described output voltage revision directive value, provides described output voltage revision directive value by described Department of Communication Force to the supply unit of described communication object.
2. a power-supply system, possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, and the feature of described power-supply system is,
Possess output voltage revision directive portion, this output voltage revision directive portion calculates output voltage revision directive value, and provides described output voltage revision directive value to described multiple supply unit,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of reference voltage by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the output voltage changing unit changing output voltage according to described output voltage revision directive value.
3. a power-supply system, possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, and the feature of described power-supply system is,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of desired value by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the desired value changing unit changing described desired value according to output voltage alteration command value,
At least one supply unit among described multiple supply unit possesses output voltage alteration command portion, and this output voltage alteration command portion provides described output voltage alteration command value by described Department of Communication Force simultaneously to other supply units be connected in parallel,
The described desired value changing unit of the described described supply unit that is connected in parallel and other supply units described, after the sign off of described output voltage alteration command value, changes described desired value simultaneously.
4. a power-supply system, possesses multiple supply unit, and input part and the efferent of these supply units are connected in parallel respectively, and the feature of described power-supply system is,
Possess output voltage alteration command portion, this output voltage alteration command portion provides output voltage alteration command value to described multiple supply unit,
Described supply unit possesses: the converter unit of carrying out power converter; Be constant constant voltage control part according to the output voltage of described converter unit and the comparative result of desired value by the output voltage control of described supply unit; Detect the output electric current measure portion of output current; Become large along with described output current and reduce the droop characteristic generating unit of described output voltage; And carry out the Department of Communication Force communicated between the supply unit of communication object; With the desired value changing unit changing described desired value according to described output voltage alteration command value,
Described output voltage alteration command portion provides described output voltage alteration command value by described Department of Communication Force simultaneously to described multiple supply unit,
The described desired value changing unit of described multiple supply unit, after the sign off of described output voltage alteration command value, changes described desired value simultaneously.
5. power-supply system according to claim 1, wherein,
Described output voltage revision directive portion compensates the reduction of the output voltage that described droop characteristic generating unit causes by setting described output voltage revision directive value, increase to make the output voltage of described supply unit become large along with described output current, compensate the reduction of the output voltage that described droop characteristic generating unit causes thus.
6. power-supply system according to claim 3, wherein,
Described output voltage alteration command portion, by the described output voltage alteration command value of setting, increases to make the output voltage of described supply unit become large along with described output current, compensates the reduction of the output voltage that described droop characteristic generating unit causes thus.
7. power-supply system according to claim 2, wherein,
Described power-supply system possesses output electric current measure portion, and this output electric current measure portion detects or obtains the output current of described power-supply system,
Described output voltage revision directive portion is by the described output voltage revision directive value of setting, increase to make the output voltage of described power-supply system become large along with the output current detected by described output electric current measure portion, compensate the reduction of the output voltage that described droop characteristic generating unit causes thus.
8. power-supply system according to claim 4, wherein,
Described power-supply system possesses output electric current measure portion, and this output electric current measure portion detects or obtains the output current of described power-supply system,
Described output voltage alteration command portion is by the described output voltage alteration command value of setting, increase to make the output voltage of described power-supply system become large along with the output current detected by described output electric current measure portion, compensate the reduction of the output voltage that described droop characteristic generating unit causes thus.
9. the power-supply system according to claims 1 or 2, wherein,
Described power-supply system possesses output voltage test section, and this output voltage test section detects the output voltage of described power-supply system,
Described output voltage revision directive portion asks for output voltage revision directive value, to make the output voltage of described power-supply system to be set to controlled quentity controlled variable, the output voltage revision directive value of described power-supply system is set to operational ton to carry out FEEDBACK CONTROL.
10. the power-supply system according to claim 3 or 4, wherein,
Described power-supply system possesses output voltage test section, and this output voltage test section detects the output voltage of described power-supply system,
Described output voltage alteration command portion asks for output voltage alteration command value, to make the output voltage of described power-supply system to be set to controlled quentity controlled variable, the output voltage alteration command value of described power-supply system is set to operational ton to carry out FEEDBACK CONTROL.
11. power-supply systems according to any one of claim 1,2,5,7,9, wherein,
Described output voltage revision directive portion is by the DA conversion of shake or PWM and at least produce described output voltage revision directive value.
12. power-supply systems according to any one of claim 3,4,6,8,10, wherein,
Described output voltage alteration command portion is by the DA conversion of shake or PWM and at least produce described output voltage alteration command value.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-207254 | 2013-10-02 | ||
| JP2013207254 | 2013-10-02 | ||
| JP2013237284 | 2013-11-15 | ||
| JP2013-237284 | 2013-11-15 | ||
| PCT/JP2014/075984 WO2015050093A1 (en) | 2013-10-02 | 2014-09-30 | Power supply system |
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| Publication Number | Publication Date |
|---|---|
| CN105580261A true CN105580261A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480052330.3A Pending CN105580261A (en) | 2013-10-02 | 2014-09-30 | Power supply system |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JP6206500B2 (en) |
| CN (1) | CN105580261A (en) |
| DE (1) | DE112014004589T5 (en) |
| WO (1) | WO2015050093A1 (en) |
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| CN109155590A (en) * | 2016-06-23 | 2019-01-04 | 株式会社达谊恒 | Power-supply system, power supply device, control method and control program |
| CN110488901A (en) * | 2019-09-18 | 2019-11-22 | 深圳市友华通信技术有限公司 | The output voltage adjusting method and device of power module |
| CN111628634A (en) * | 2020-06-19 | 2020-09-04 | 西安微电子技术研究所 | Output isolation power supply sampling circuit and method |
| CN112821753A (en) * | 2021-02-25 | 2021-05-18 | 中国电子科技集团公司第十八研究所 | Multi-module power distribution topological circuit |
| CN113346473A (en) * | 2021-05-25 | 2021-09-03 | 上海辛格林纳新时达电机有限公司 | Grid-connected control method and grid-connected control device |
| US11642735B2 (en) | 2017-07-05 | 2023-05-09 | Daihen Corporation | Power supply system, power supply device, and control method |
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| JP6609506B2 (en) * | 2016-04-11 | 2019-11-20 | 株式会社日立産機システム | Power converter |
| JP7018847B2 (en) * | 2018-08-03 | 2022-02-14 | Ntn株式会社 | Switching power supply system and DC power supply system |
| JP7030033B2 (en) * | 2018-08-31 | 2022-03-04 | 株式会社デンソー | Power conversion system |
| JP7291592B2 (en) * | 2019-10-01 | 2023-06-15 | 日鉄テックスエンジ株式会社 | Converter device and its output control method |
| JP7200901B2 (en) * | 2019-10-03 | 2023-01-10 | 株式会社豊田自動織機 | power supply |
| WO2022030363A1 (en) * | 2020-08-05 | 2022-02-10 | パナソニックＩｐマネジメント株式会社 | Power system, controller, power conversion device, power system control method, and program |
| JPWO2022097538A1 (en) * | 2020-11-06 | 2022-05-12 | ||
| JP2022086418A (en) * | 2020-11-30 | 2022-06-09 | 株式会社アドバンテスト | Power supply device, power supply unit, and test device |
| JP2022086417A (en) * | 2020-11-30 | 2022-06-09 | 株式会社アドバンテスト | Power supply device, power supply unit, and test device |
| JP7370482B2 (en) | 2021-01-27 | 2023-10-27 | 株式会社三社電機製作所 | Power system and power unit |
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Also Published As
| Publication number | Publication date |
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| JP2017127195A (en) | 2017-07-20 |
| JP6206500B2 (en) | 2017-10-04 |
| JPWO2015050093A1 (en) | 2017-03-09 |
| WO2015050093A1 (en) | 2015-04-09 |
| DE112014004589T5 (en) | 2016-08-18 |
| JP6296192B2 (en) | 2018-03-20 |
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