CN106685228B - A kind of direct current conversion method and direct current transducer - Google Patents
A kind of direct current conversion method and direct current transducer Download PDFInfo
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- CN106685228B CN106685228B CN201710134500.8A CN201710134500A CN106685228B CN 106685228 B CN106685228 B CN 106685228B CN 201710134500 A CN201710134500 A CN 201710134500A CN 106685228 B CN106685228 B CN 106685228B
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- Dc-Dc Converters (AREA)
Abstract
The invention provides a kind of direct current conversion method and direct current transducer, wherein, the closed loop control method based on monte carlo method, comprise the following steps：Every random time intervals t, an output valve U is gatheredout, from being gathered n-th, compare the nearest n U collectedoutWith U1Size, if being more than U1UoutNumber be a, less than U1UoutNumber be b；According to a and b size, Dynamic gene c is calculated；Output valve U is controlled according to Dynamic gene cout；Circulating repetition above step, you can realize output valve UoutClosed-loop control.According to the present invention, it can make in closed loop control process, it is more gentle gentle by controlling value (such as voltage, electric current) makeover process, slow down by the fluctuation of controlling value, it can just be corrected before the closed loop upper limit or lower limit is touched by controlling value, enable preferably to be maintained near setting value by controlling value.
Description
Technical field
The present invention relates to electric current and voltage close loop control field, in particular to a kind of DC-to-dc conversion method and
DC-to-dc converter.
Background technology
The battery output voltage of electric automobile is different with Rated motor voltage and vehicle electronic device control voltage, if thinking
Battery is allowed just to need to change battery output voltage to motor or vehicle electronic device power supply, generally use direct current-
DC converting circuit.
Wherein, the output voltage of battery, the i.e. input voltage of DC-to-dc change-over circuit are Uin, DC-to-dc conversion
The output voltage of circuit is Uout。
Typically, Uout=k*Uin, wherein k is conversion coefficient, can be set manually and adjust, so that output voltage
UoutReach required value, and output voltage UoutNeed to keep stable.
However, input voltage is UinA not constant value, because, with the use of battery, battery
Output voltage can be reduced gradually, also, ambient air temperature also have on the output voltage of battery it is certain influence, battery during low temperature
Output voltage is relatively low, and battery output voltage is higher when temperature is high；In addition, the vibration in vehicle travel process, and other one
A little uncertain factors, certain interference will also result in the course of work of DC-to-dc change-over circuit, cause conversion coefficient k meetings
There is a range of fluctuation.Above-mentioned factor is superimposed so that output voltage UoutAlso certain fluctuation, this ripple can be produced
It is dynamic that both there is overall variation tendency, there is certain randomness again.
In order to ensure the output voltage U of the operating voltage of motor or vehicle electronic device, i.e. DC-to-dc change-over circuitout
Substantially constant to DC-to-dc transfer process, it is necessary to carry out closed-loop control.
The closed loop is also feedback control system, be by the measured value of system output quantity compared with desired set-point
Compared with thus one deviation signal of generation, control is adjusted using this deviation signal, makes output valve as far as possible close to desired value.
Specifically, traditional closed loop control method, is mainly comprised the following steps：Closed loop upper and lower bound is set, if output voltage
UoutMore than or equal to the closed loop upper limit, then conversion coefficient k is reduced, if output voltage UoutLess than or equal to closed loop lower limit, then rise conversion
Coefficient k.
Conventional method, principle are simple, it is easy to accomplish, but also there are some drawbacks.Because output voltage UoutOnce touch
The upper limit or lower limit of closed loop, conversion coefficient k will be reduced or raised immediately, output voltage U may be causedoutSaltus step frequency
Numerous, unitary sampling result is exceeded caused by accidentalia, can cause unnecessary makeover process, and output voltage UoutDuring amendment
Changes in amplitude is not steady enough, easily produces impact to electrical appliance, influences the life-span of electrical appliance.
If output voltage UoutSkew there is certain rule, can be according to rule look-ahead output voltage Uout, and
Conversion coefficient k is corrected in advance, to avoid output voltage UoutThe upper limit or lower limit of closed loop are touched, makes output voltage UoutIt is more steady
It is fixed.But due to output voltage UoutFluctuation have uncertainty, this method can not be general in all occasions.
The content of the invention
Therefore, the main purpose of the invention is to provide a kind of DC-to-dc conversion method and DC-to-dc conversion
Device, to reach following purpose：So that in closed loop control process, it is more gentle by controlling value (such as voltage, electric current) change procedure
Gently, slow down by the fluctuation of controlling value, can be also better maintained at by controlling value near setting value.
To achieve the above object, the present invention provides following technical scheme：
A kind of state according to as the present invention, closed loop control method based on monte carlo method, comprises the following steps：If
Input value is Uin, output valve Uout, conversion coefficient k, closed loop lower limit is U0, closed loop standard value is U1, the closed loop upper limit is U2；It is known
Uout=k*Uin, wherein k can be set manually and adjust, so that output valve UoutReach required value；Every random time
T is spaced, gathers an output valve Uout, from being gathered n-th, compare the nearest n U collectedoutWith U1Size, if being more than
U1UoutNumber be a, less than U1UoutNumber be b；If a>B, Dynamic gene c=(a-b)/n* (U2-U1)/(U2-
U0), k=(1-c) * k are set；Or if a<B, Dynamic gene c=(a-b)/n* (U1-U0)/(U2-U0), k=(1-c) * is set
k；In this way, output valve UoutWill accordingly it change；Circulating repetition above step, you can realize output valve UoutClosed loop control
System.
According to two patterns of the present invention, a kind of DC-to-dc conversion method, comprise the steps of：Step S200 is soft to open
It is dynamic, after start, certain time is waited, control unit sends full-bridge drive signal, the full-bridge according to the voltage to be exported afterwards
Drive signal is square wave；Step S220, to input voltage, input current, output voltage, output current, full-bridge temperature, rectification
Temperature is sampled, and eliminates interference to obtained sampled data using digital filtering algorithm, if input voltage is over-pressed, input electricity
Under-voltage, input current excessively stream is pressed, output voltage overvoltage, output voltage is under-voltage, output current excessively stream, full-bridge inverting unit excess temperature,
Or synchronous rectification unit excess temperature, then shut down, after waiting certain time, then start shooting, return to step S220；Step S230, passes through temperature
Degree, voltage close loop algorithm calculate and export the dutycycle of the full-bridge drive signal, concretely comprise the following steps：Sub-step S300, if adopting
Sample temperature reaches closed loop thermal, every liter of 1 DEG C of reduction rated power 10%, sub-step S310, passes through the state according to as the present invention
The described closed loop control method based on monte carlo method performs voltage close loop control；Return to step S220, and enter simultaneously
Step S240；Step S240, judge whether to meet to open synchronous rectification condition, if so, delayed start-up synchronous rectification, if it is not, fast
Speed closes synchronous rectification.
According to the present invention three patterns, a kind of DC-to-dc converter, including：Control unit, according to the number collected
According to, by according to the present invention two patterns described in DC-to-dc conversion method, the DC-to-dc converter is controlled
System；Full-bridge inverting unit, voltage transformation unit, synchronous rectification unit, are sequentially connected in series between direct-flow input end and DC output end；It is defeated
Enter voltage sampling unit, be connected between the direct-flow input end and described control unit, for being transmitted to described control unit
Input voltage sampled data；Input current sampling unit, it is connected between the direct-flow input end and described control unit, is used for
Input current sampled data is transmitted to described control unit；Output voltage sampling unit, it is connected on the DC output end and institute
Between stating control unit, for transmitting output voltage sampled data to described control unit；Output current sampling unit, is connected on
Between the DC output end and described control unit, for transmitting output current sampled data to described control unit；Full-bridge
Driver element, it is connected between described control unit and the full-bridge inverting unit, for being received according to from described control unit
The signal arrived, drive the full-bridge inverting cell operation；Full-bridge temperature sampling unit, be connected on described control unit with it is described complete
Between bridge inversion unit, transmitted for monitoring the temperature of the full-bridge inverting unit, and by full-bridge temperature data to the control
Unit；Rectification drive unit, it is connected between described control unit and the synchronous rectification unit, for according to from the control
The signal that unit receives, drive the synchronous rectification cell operation；Rectification temperature sampling unit, is connected on described control unit
Between the synchronous rectification unit, for monitoring the temperature of the synchronous rectification unit, and by rectification temperature data transmit to
Described control unit.
It according to the closed loop control method based on monte carlo method of the present invention, can make in closed loop control process, be controlled
Value (such as voltage, electric current) makeover process processed is more gentle gentle, slows down by the fluctuation of controlling value, closed loop is being touched by controlling value
It can just be corrected before the upper limit or lower limit, enable preferably to be maintained near setting value by controlling value.The present invention's closes
Ring control method is applied in voltage/current closed loop control process, and the process for correcting voltage/current will be more gentle gentle,
And unnecessary makeover process is reduced, voltage/current is better maintained near setting value, reach the basic of voltage/current
It is constant, the impact to electrical appliance is reduced, is more stably worked using electrical equipment, extends the life-span of electrical appliance.
According to the DC-to-dc conversion method of closed loop control method of the use based on monte carlo method of the present invention and directly
Stream-direct current transducer, the energy conversion efficiency of electric energy is improved, realize voltage, electric current and converter to inputting, exporting
Temperature monitor in real time, realize temperature closed loop, voltage close loop, voltage and current is stably exported.
Brief description of the drawings
Fig. 1 is the flow of the closed loop control method based on monte carlo method of the exemplary embodiment of present inventive concept
Figure；
Fig. 2 is the straight of closed loop control method of the use based on monte carlo method of the exemplary embodiment of present inventive concept
The pie graph of stream-direct current transducer；
Fig. 3 is the straight of closed loop control method of the use based on monte carlo method of the exemplary embodiment of present inventive concept
The flow chart of stream-direct current conversion method；
Fig. 4 is the temperature of closed loop control method of the use based on monte carlo method of the exemplary embodiment of present inventive concept
Degree, the flow chart of voltage close loop control；
Fig. 5 is that the exemplary embodiment of present inventive concept does not make output voltage U during voltage close loop controloutCurve map；
Fig. 6 is that closed loop control method of the use of the exemplary embodiment of present inventive concept based on monte carlo method is carried out
Output voltage U when voltage close loop controlsoutCurve map.
Embodiment
Detailed content and technology on the invention illustrate, are now described further with embodiment, it will be appreciated that
, these embodiments are only to be used to illustrate, and are not necessarily to be construed as the limitation of the invention implementation.
For example, the input voltage U of the DC-to-dc converter of the voltage of accumulator of electric car, the i.e. embodiment of the present inventionin
Initial value be 700V, with the use of battery, voltage gradually reduces；Known output voltage Uout=k*Uin, wherein k is to turn
Coefficient is changed, initial value is manually set to 0.05, with the operation of transfer process, there is fluctuation within a narrow range.Voltage close loop upper limit U2For
37V, closed loop voltage setting value U1For 35V, closed loop lower limit U0For 33V.If not to output voltage UoutIt is modified, output voltage
Uout27.23V will be displaced to always from 35V (as shown in the row of table 1 the 1st~4 and Fig. 5).
Therefore need using the present invention based on the closed loop control method of monte carlo method to output voltage UoutRepaiied
Just.
Fig. 1 is the stream according to the closed loop control method based on monte carlo method of the exemplary embodiment of present inventive concept
Cheng Tu.Reference picture 1, according to the present invention the closed loop control method based on monte carlo method, applied to electric automobile direct current-
DC converting circuit, with the output voltage U to DC-to-dc change-over circuitoutClosed-loop control is carried out, is comprised the following steps that：
Every random time intervals t (step S10), an output voltage U is gatheredout(step S20), from being gathered n-th
(step S30), compare the nearest n U collectedoutWith U1Size, if being more than U1UoutNumber be a, less than U1Uout
Number be b (step S40).
In the present embodiment, t=0.01+0.005r (second) could be arranged to, r is the random number between 0~1, n=10, i.e.,
From the 10th U of collectionoutRise, compare nearest 10 U collectedoutWith U1Size；
If a>B (step S50), Dynamic gene c=(a-b)/n* (U2-U1)/(U2-U0) (step S60)；
If a<B (step S51), Dynamic gene c=(a-b)/n* (U1-U0)/(U2-U0), (step S61)；
Otherwise c=0 (step S62)；
K=(1-c) * k are set, consequently, it is possible to output voltage Uout(step S70) will accordingly be changed；
Circulating repetition above step, you can realize output voltage UoutClosed-loop control (as shown in table 1 and Fig. 6).
With reference to the row of table the 1, the 1st~10, conversion coefficient k is equal to former conversion coefficient k before correcting；From the 11st row, each collection
After amendment when conversion coefficient k is all upper collection moment t before amendment during moment t after conversion coefficient k superpositions small sample perturbations
Result；The output voltage U collected during each collection moment toutFor output voltage U before amendmentout, output voltage before the amendment
UoutTo change coefficient k and input voltage U before the t amendmentinProduct.
Table 1
Here, it is illustrated by taking voltage as an example, above Uin、Uout、U1、U2And U0Electric current is readily applicable to, to carry out
Closed-loop current control.
Monte carlo method, also referred to as statistical simulation methods, it is development and electronics of 1940 mid-nineties 90s due to science and technology
The invention of computer, and a kind of numerical computation method using Probability Statistics Theory as guidance proposed, are that one kind uses random number
(or more conventional pseudo random number) solves the method for many computational problems.
Monte carlo method is applied closed-loop control in voltage (or electric current) by the present invention, by generating random number, with
The time interval of machine is to output voltage UoutSampled, and fully take into account the randomness of sampled result, with output voltage Uout
Based on the probability statistics result of distribution, to output voltage UoutIt is modified, realizes the sampling covering of more science, avoid
The interference of accidentalia, make Closed-cycle correction process more gentle gentle.
It according to the closed loop control method based on monte carlo method of the present invention, can make in closed loop control process, be controlled
Value (such as voltage, electric current) makeover process processed is more gentle gentle, slows down by the fluctuation of controlling value, closed loop is being touched by controlling value
It can just be corrected before the upper limit or lower limit, enable preferably to be maintained near setting value by controlling value.The present invention's closes
Ring control method is applied in voltage/current closed loop control process, and the process for correcting voltage/current will be more gentle gentle,
And unnecessary makeover process is reduced, voltage/current is better maintained near setting value, reach the basic of voltage/current
It is constant, the impact to electrical appliance is reduced, is more stably worked using electrical equipment, extends the life-span of electrical appliance.
More than, to the closed loop control method based on monte carlo method of the exemplary embodiment according to present inventive concept
Flow is illustrated.Then, the closing based on monte carlo method of the use to the exemplary embodiment according to present inventive concept
The operation principle of the DC-to-dc converter of ring control method is described as follows.
Fig. 2 is the straight of closed loop control method of the use based on monte carlo method of the exemplary embodiment of present inventive concept
The pie graph of stream-direct current transducer；Fig. 3 is use the closing based on monte carlo method of the exemplary embodiment of present inventive concept
The flow chart of the DC-to-dc conversion method of ring control method；Fig. 4 is that the use of the exemplary embodiment of present inventive concept is based on
The temperature of the closed loop control method of monte carlo method, the flow chart of voltage close loop control.
Referring to Fig. 2, according to closed-loop control of the use of the exemplary embodiment of present inventive concept based on monte carlo method
The operation principle of the DC-to-dc converter of method is as follows：Input dc power inputs full-bridge inverting unit through direct-flow input end 100
101 are converted to alternating current, and after voltage transformation unit 102 is boosted or is depressured, the synchronized rectification of rectification unit 103 is direct current, warp
DC output end 104 exports.Wherein, enable input 131 and receive enable signal, then control unit 130 is started working, control
Unit 130 exports full-bridge drive signal to full-bridge driver element 121, and full-bridge driver element 121 drives the work of full-bridge inverting unit 101
Make；Control unit 130 exports synchronous rectification signal to rectification drive unit 122, and rectification drive unit 122 drives synchronous rectification list
Member 103 works.When the DC-to-dc converter works, input voltage sampling unit 111 gathers direct-flow input end 100
Voltage data, and it is sent to control unit 130；Input current sampling unit 112 gathers the current data of direct-flow input end 100,
And it is sent to control unit 130；Output voltage sampling unit 115 gathers the voltage data of DC output end 104, and is sent to control
Unit 130 processed；Output current sampling unit 116 gathers the current data of DC output end 104, and is sent to control unit 130；
Full-bridge temperature sampling unit 113 gathers the temperature data of full-bridge inverting unit 101, and is sent to control unit 130；Rectification temperature
Sampling unit 114 gathers the temperature data of synchronous rectification unit 103, and is sent to control unit 130；The basis of control unit 130
The data such as the voltage that collects, electric current, temperature, adjust the dutycycle of full-bridge drive signal in real time, and whether control synchronous rectification opens
Open, and the dutycycle of adjustment rectification drive signal.
Here, the synchronous rectification refers to control sense of current in rectifier bridge by rectification drive signal, so as to avoid
Pressure drop caused by diode in conventional rectification bridge, energy is saved, improve the energy conversion efficiency of electric energy.
Referring to Fig. 3, the use according to the exemplary embodiment of present inventive concept is described in detail based on monte carlo method
The workflow of the DC-to-dc converter of closed loop control method.Direct-flow input end 100 connects direct current, enable signal input
End 131 receives enable signal, DC-to-dc converter soft start, that is, waits certain time (such as 2s), makes each component voltage
Stable, control unit 130 sends full-bridge drive signal, the full-bridge drive signal is square wave (step according to the voltage to be exported
Rapid S200)；Input voltage sampling unit 111 gathers input voltage, and input current sampling unit 112 gathers input current, output
Voltage sampling unit 115 gathers output voltage, and output current sampling unit 116 gathers output current, full-bridge temperature sampling unit
The temperature of 113 collection full-bridge inverting units 101, rectification temperature sampling unit 114 gather the temperature of synchronous rectification unit 103, control
Unit 130 processed eliminates interference using digital filtering algorithm to obtained sampled data, judges whether input voltage overvoltage, input electricity
Under-voltage, input current excessively stream is pressed, output voltage overvoltage, output voltage is under-voltage, output current excessively stream, full-bridge inverting unit excess temperature,
Or synchronous rectification unit excess temperature (step S220), if there is one of the above situation, shut down (step S221), wait certain time
(such as 2s) starts shooting (step S222) afterwards, and whether decision circuitry under-voltage again, over-pressed, excessively stream, excess temperature (step S220).Above-mentioned step
It is rapid to serve the described DC/DC convertor circuitry of protection, and the effect of protection load electrical appliance.
According to full-bridge temperature, rectification temperature, output voltage, the output current collected, according to the voltage of rated output, electricity
Stream and power, using closed loop algorithm, control unit 130 adjusts the dutycycle of full-bridge drive signal, temperature, voltage is reached closed loop
State (step S230).
The step of coming back to whether under-voltage decision circuitry, over-pressed, excessively stream, excess temperature (step S220), and enter simultaneously and sentence
Disconnected the step of whether meeting to open the condition of synchronous rectification (step S240).
Judge whether to meet the condition (such as output voltage is more than 25V, and output current is more than 50A) for opening synchronous rectification
(step S240), if satisfied, delayed start-up synchronous rectification (step S241), otherwise closes rapidly synchronous rectification (step S242).
Referring to Fig. 4, the temperature, voltage close loop control, and idiographic flow is as follows：First determine whether full-bridge temperature or rectification temperature
Whether closed loop thermal (step S300) is reached, if reaching, temperature often raises 1 DEG C, rated power is reduced by 10% (step S301),
Otherwise voltage close loop control (step S310) is performed, the voltage close loop control (step S310) is the special based on covering of the present invention
The closed loop control method (step S10~S70) of Carlow method.
According to the DC-to-dc conversion method of closed loop control method of the use based on monte carlo method of the present invention and directly
Stream-direct current transducer, the energy conversion efficiency of electric energy is improved, realize voltage, electric current and converter to inputting, exporting
Temperature monitor in real time, realize temperature closed loop, voltage close loop, voltage and current is stably exported.
The above is only the preferred embodiment of the invention, it is impossible to the implementation model of the invention is limited with this
Enclose, i.e., every simple equivalent changes and modifications made according to the invention claim and innovation and creation description,
All still fall within the scope that the invention is covered.
Claims (2)
1. a kind of DC-to-dc conversion method, it is characterised in that comprise the steps of：
Step S200, soft start, after start, certain time is waited, control unit sends full-bridge according to the voltage to be exported afterwards
Drive signal, the full-bridge drive signal are square wave；
Step S220, input voltage, input current, output voltage, output current, full-bridge temperature, rectification temperature are sampled,
And interference is eliminated to obtained sampled data using digital filtering algorithm, and if input voltage is over-pressed, input voltage is under-voltage, input electricity
Flow through, output voltage overvoltage, output voltage is under-voltage, output current excessively stream, full-bridge inverting unit excess temperature, or synchronous rectification unit
Excess temperature, then shut down, after waiting certain time, then start shooting, return to step S220；
Step S230, calculated by temperature, voltage close loop algorithm and export the dutycycle of the full-bridge drive signal, specific steps
For：Sub-step S300, if sample temperature reaches closed loop thermal, every liter of 1 DEG C of reduction rated power 10%, sub-step S310, pass through
Closed loop control method based on monte carlo method performs voltage close loop control；
Return to step S220, and enter step S240 simultaneously；
Step S240, judge whether to meet to open synchronous rectification condition, if so, delayed start-up synchronous rectification, if it is not, rapid close
Synchronous rectification；
Wherein, the closed loop control method based on monte carlo method described in sub-step S310, comprises the following steps：
If input value is Uin, output valve Uout, conversion coefficient k, closed loop lower limit is U0, closed loop standard value is U1, the closed loop upper limit is
U2；Known Uout=k*Uin, wherein can be set manually and adjust, so that output valve UoutReach required value；
Every random time intervals t, an output valve U is gatheredout, from being gathered n-th, compare the nearest n U collectedout
With U1Size, if being more than U1UoutNumber be a, less than U1UoutNumber be b；
If a>B, Dynamic gene c=(a-b)/n* (U2-U1)/(U2-U0), k=(1-c) * k are set；Or
If a<B, Dynamic gene c=(a-b)/n* (U1-U0)/(U2-U0), k=(1-c) * k are set；
In this way, output valve UoutWill accordingly it change；
Circulating repetition above step, that is, realize output valve UoutClosed-loop control.
A kind of 2. DC-to-dc converter, it is characterised in that including：
Control unit, according to the data collected, by DC-to-dc conversion method according to claim 1, to described
DC-to-dc converter is controlled；
Full-bridge inverting unit, voltage transformation unit, synchronous rectification unit, are sequentially connected in series between direct-flow input end and DC output end；
Input voltage sampling unit, it is connected between the direct-flow input end and described control unit, for single to the control
Member transmission input voltage sampled data；
Input current sampling unit, it is connected between the direct-flow input end and described control unit, for single to the control
Member transmission input current sampled data；
Output voltage sampling unit, it is connected between the DC output end and described control unit, for single to the control
Member transmission output voltage sampled data；
Output current sampling unit, it is connected between the DC output end and described control unit, for single to the control
Member transmission output current sampled data；
Full-bridge driver element, it is connected between described control unit and the full-bridge inverting unit, for according to from the control
The signal that unit receives, drive the full-bridge inverting cell operation；
Full-bridge temperature sampling unit, it is connected between described control unit and the full-bridge inverting unit, it is described complete for monitoring
The temperature of bridge inversion unit, and full-bridge temperature data is transmitted to described control unit；
Rectification drive unit, it is connected between described control unit and the synchronous rectification unit, for according to from the control
The signal that unit receives, drive the synchronous rectification cell operation；
Rectification temperature sampling unit, it is connected between described control unit and the synchronous rectification unit, it is described same for monitoring
The temperature of rectification unit is walked, and rectification temperature data is transmitted to described control unit.
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| CN103973105A (en) * | 2013-12-10 | 2014-08-06 | 国家电网公司 | Method for controlling high-dynamic properties of high-power bidirectional DC/DC converters |
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