CN110311564B - DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium - Google Patents

DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium Download PDF

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Publication number
CN110311564B
CN110311564B CN201910692177.5A CN201910692177A CN110311564B CN 110311564 B CN110311564 B CN 110311564B CN 201910692177 A CN201910692177 A CN 201910692177A CN 110311564 B CN110311564 B CN 110311564B
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voltage
transforming unit
coupled
diode
reverse
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CN110311564A (en
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李锐
代辉
金辉
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Hangzhou Electric Co ltd
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Hangzhou Electric Co ltd
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Priority to PCT/CN2019/128541 priority patent/WO2021017388A1/en
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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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load

Abstract

The invention relates to the technical field of converters, and discloses a DCDC circulation control device, which comprises a load R and at least 2 converters, wherein each converter comprises: the power supply input end is connected with the direct current source and receives voltage which is formed by the direct current source and needs to be converted; the voltage transformation module is connected between the power supply input end and the voltage output end; the voltage output end comprises a positive electrode interface and a negative electrode interface, and the positive input end of the power input end is connected to one end of the load R through the transformation module and the positive electrode interface; the negative input end of the power supply input end is connected to the other end of the load R through the voltage transformation module and the negative interface; the current flowing through the positive electrode interface is set to be i1, and the current flowing through the negative electrode interface is set to be i 2; and the regulating module is connected in series with the negative output end of the voltage transformation module, and enables i1 of different converters to be equal and i2 of different converters to be equal through the current sharing control and regulating module. The invention also provides a DCDC circulation control method, electronic equipment and a computer readable storage medium.

Description

DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium
Technical Field
The present invention relates to the field of converter technologies, and in particular, to a DCDC circulation control device, a DCDC circulation control method, an electronic apparatus, and a medium.
Background
If a dc voltage can be converted to another dc voltage by a converter (e.g. 3.0V to 1.5V or 5.0V), we refer to the converter as a DCDC converter, or as a switching power supply or switching regulator. Large devices often require large dc power supplies. The power capacity of individual power supply components is limited and distributed power systems are often employed where large capacity power is required. The distributed power supply system is a large-capacity power supply system formed by combining a plurality of small-capacity power supply modules.
Theoretically, the distributed power supply system can be formed in a series connection mode, a parallel connection mode, a series connection and parallel connection mixed mode and the like, but in practical application, the requirement on the output current of a power supply is usually high, and the requirement on the output voltage is not high, so that the parallel power supply system is widely applied.
In the prior art, a power module can adopt a non-isolated DCDC converter, the converters are connected in parallel to form a power system, but when the converters are connected in parallel, a circulating current exists between the converters, so that positive and negative currents of the same converter are not equal, further, each converter is heated unevenly, and the converter is easy to damage.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a DCDC circulation control apparatus, which makes i1 of different converters equal and i2 of different converters equal through a current-sharing control and regulation module, i.e. the sum of i1 and i2 of the same converter is zero, so as to reduce circulation between converters and reduce the probability of device damage in the converters.
One of the purposes of the invention is realized by adopting the following technical scheme: a DCDC circulation control apparatus comprising a load R, at least 2 converters, each of said converters comprising:
the power supply input end is connected with a direct current source and receives voltage which is formed by the direct current source and needs to be converted;
the voltage transformation module is connected between a power supply input end and a voltage output end and is used for transforming the voltage received by the power supply input end and outputting the transformed voltage to the voltage output end;
the voltage output end is connected to the output end of the voltage transformation module, the voltage output end comprises a positive electrode interface and a negative electrode interface, and the positive input end of the power supply input end is connected to one end of a load R through the voltage transformation module and the positive electrode interface; the negative input end of the power supply input end is connected to the other end of the load R through the voltage transformation module and the negative interface; the current flowing through the positive electrode interface is set to be i1, and the current flowing through the negative electrode interface is set to be i 2;
and the regulating module is connected in series with the negative output end of the voltage transformation module and is used for regulating i2, and the current sharing control and regulating module enables i1 of different converters to be equal and enables i2 of different converters to be equal.
Further, the adjusting module comprises a switch tube S0, the switch tube S0 has a control end, a forward end and a reverse end, the voltage of the forward end is higher than that of the reverse end,
the control end of the switch tube S0 is coupled to the PWM width-adjusting device or the voltage control device, respectively, the positive end of the switch tube S0 is coupled to the negative output end of the transformer module, the positive end of the switch tube S0 is coupled to the negative output end of the transformer unit, and the reverse end of the switch tube S0 is coupled to the negative interface.
Further, the dc source includes an ac power source and a rectifying module, and the ac power source forms the power input terminal via the rectifying module.
Furthermore, the voltage transformation module at least comprises a first voltage transformation unit, and the first voltage transformation unit is sequentially connected in series between the power input end and the voltage output end.
Further, the first transforming unit includes an inductor L1, a switching tube S1, a diode D7, and a capacitor C1, the switching tube S1 has a control end, a forward end, and a reverse end, the control end is connected to the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
one end of the inductor L1 is a positive input end of the first transforming unit, the other end of the inductor L1 is coupled to an anode of a diode D7, a cathode of the diode D7 is a positive output end of the first transforming unit, a forward end of the switch tube S1 is coupled to an anode of a diode D7, a negative input end and a negative output end of the first transforming unit are both coupled to a reverse end of the switch tube S1, and two ends of the capacitor C1 are respectively coupled to a cathode of the diode D7 and a reverse end of the switch tube S1.
Further, the first transforming unit includes an inductor L3, a switching tube S3, a diode D9, and a capacitor C3, the switching tube S3 has a control end, a forward end, and a reverse end, the control end is connected to the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the positive end of the switch tube S3 is the positive input end of the first transforming unit, the reverse end is coupled to one end of an inductor L3, the other end of the inductor L3 is the positive output end of the first transforming unit, the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the negative input end and the negative output end of the first transforming unit are both coupled to the anode of the diode D9, and two ends of the capacitor C3 are respectively coupled to the anode of the diode D9 and the positive output end of the first transforming unit.
Furthermore, the transformation module at least comprises a second transformation unit, and the first transformation unit and the second transformation unit are connected in series between the power input end and the voltage output end.
The second transforming unit comprises an inductor L3, a switching tube S3, a diode D9 and a capacitor C3, the switching tube S3 has a control end, a forward end and a reverse end, the control end is connected to the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the positive end of the switch tube S3 is the positive input end of the second transforming unit, the reverse end is coupled to one end of an inductor L3, the other end of the inductor L3 is the positive output end of the second transforming unit, the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the negative input end and the negative output end of the second transforming unit are both coupled to the anode of the diode D9, and two ends of the capacitor C3 are coupled to the anode of the diode D9 and the positive output end of the second transforming unit, respectively.
The second purpose of the invention is realized by adopting the following technical scheme: a DCDC circulation control method using the above DCDC circulation control apparatus, comprising:
acquiring the total number of converters and setting the total number as N;
acquiring current passing through a load R and setting the current as iout;
acquiring current i1 and current i2 of each converter;
and judging whether the values of the current i1 and the current i2 of each converter are equal to the value of iout divided by N, if not, enabling the values of i1 and i2 to be equal to the value of iout divided by N through the current sharing control and regulation module.
It is a third object of the present invention to provide an electronic device for performing the second object, comprising a processor, a storage medium, and a computer program, the computer program being stored in the storage medium, the computer program, when executed by the processor, implementing the above-mentioned DCDC circulation control method.
It is a fourth object of the present invention to provide a computer-readable storage medium storing the second object of the present invention, having a computer program stored thereon, which when executed by a processor, implements the above-described DCDC circulation control method.
Compared with the prior art, the invention has the beneficial effects that: in the DCDC circulation control device, i1 of different converters is equal and i2 of different converters is equal through the current sharing control and regulation module, namely the sum of i1 and i2 of the same converter is zero, so that circulation among the converters can be reduced, and the probability of device damage in the converters can be reduced.
Drawings
FIG. 1 is a block diagram of a DCDC circulation control device according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a dc source in a second DCDC circulation control apparatus according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a converter in a second DCDC circulation control apparatus according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a first voltage transforming unit in a third DCDC loop control device according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a first voltage transforming unit in a four-DCDC loop control apparatus according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a voltage transformation module in a five-DCDC loop control device according to an embodiment of the present invention;
FIG. 7 is a block flow diagram of a six DCDC circulation control method in accordance with an embodiment of the present invention;
fig. 8 is a block diagram of a seventh electronic device according to an embodiment of the present invention.
In the figure: 1. a converter; 2. a voltage transformation module; 21. a first voltage transformation unit; 22. a second voltage transformation unit; 3. an adjustment module; 4. a direct current source; 41. an alternating current power supply; 42. a rectification module; 5. an electronic device; 51. a processor; 52. a memory; 53. an input device; 54. and an output device.
Detailed Description
The present invention will now be described in more detail with reference to the accompanying drawings, in which the description of the invention is given by way of illustration and not of limitation. The various embodiments may be combined with each other to form other embodiments not shown in the following description.
Example one
The first embodiment provides a DCDC circulation control device, which can make i1 of each converter 1 equal and i2 of each converter 1 equal through the current-sharing control and regulation module 3, so that the sum of positive and negative currents of the same converter 1 is zero, and circulation between the converters 1 is reduced.
Specifically, referring to fig. 1, a DCDC circulation control device includes a load R and converters 1, where N is greater than or equal to 2, the converters 1 are connected with a dc source 4 and connected in series to two ends of the load R, and each converter 1 includes a power input terminal, a voltage output terminal, a regulation module 3, and a transformation module 2.
The power input end has a positive input end and a negative input end, and is connected with the direct current source 4 and receives the voltage to be converted, which is the direct current voltage.
The transformation module 2 is connected with the power input end, and the transformation module 2 is used for receiving the voltage which needs to be transformed and is input from the power input end, performing voltage boosting/voltage reducing transformation on the voltage and outputting the voltage from the voltage output end, so that the DC-DC transformation of each converter 1 is realized.
The voltage output end is used for outputting the converted voltage, the voltage output end comprises a positive interface and a negative interface, and the positive input end of the power input end is connected to one end of the load R through the voltage transformation module 2 and the positive interface; the negative input end of the power input end is connected to the other end of the load R through the transformation module 2 and the negative interface, so as to realize the parallel connection of the converters 1. The current flowing through the positive interface is set to i1, and the current flowing through the negative interface is set to i 2.
The adjusting module 3 is connected in series with the negative output end of the transforming module 2, so that the value of i2 can be adjusted. The voltage output ends can be respectively connected with the voltage regulating devices, when the converters 1 are connected in parallel, the voltage output by the converters 1 can be regulated through the variable voltage regulating devices, so that the current sharing control of the converters 1 is realized, and the i1 of the converters 1 are equal.
Therefore, when each converter 1 is connected to the load R in parallel and is correspondingly connected with the direct current source 4, i1 of each converter 1 and i2 of each converter 1 can be equal through each voltage regulating device and the regulating module 3, and since the sum of i1 in each converter 1 is equal to the value of the current iout flowing through the load R and the sum of i2 in each converter 1 is equal to the value of the current iout flowing through the load R, the sum of i1 and i2 of each converter 1 is zero, so that the circulating current between each converter 1 is reduced, and the service life of the converter 1 is prolonged.
Example two
The second embodiment is performed on the basis of the first embodiment, and referring to fig. 1 and fig. 2, the dc source 4 may be a dc power supply, or may be a combination of an ac power supply 41 and a rectifier module 42. The rectifying modules 42 may be arranged in a one-to-one correspondence with the number of the converters 1, wherein the rectifying modules 42 are connected between the ac power source 41 and the transforming modules 2, and the rectifying modules 42 are configured to rectify the ac power output by the ac power source 41 and output the dc power.
In which the AC power supply 41 may be configured as multi-phase AC power or unidirectional AC power, the AC power supply 41 shown in fig. 2 is configured as three-phase AC power, and the rectifying module 42 may include three rectifying units, each of which corresponds to one of each phase of AC power. The rectifying units each include a diode D1 and a diode D2, cathodes of the diodes D1 are coupled to form a positive output terminal of the rectifying module 42 and are coupled to a positive input terminal of the transforming module D2, and each phase of AC power is coupled to an anode of the diode D1; the cathode of the diode D1 is coupled to the anode of the diode D1 in the same rectifying unit, and the anodes of the diodes D2 are both coupled to form the negative output terminal of the rectifying module 42 and are coupled to the negative input terminal of the transforming module 2.
Referring to fig. 1 and 3, the adjusting module 3 is configured as a switching tube S0, the switching tube S0 has a control terminal, a forward terminal and a reverse terminal, the voltage of the forward terminal is higher than that of the reverse terminal, the control terminal of the switching tube S0 is coupled with a PWM width-adjusting device or a voltage control device, respectively, wherein the switching tube S0 may be any one of a MOS transistor, an IGBT, GaN and a triode, and is preferably a depletion N-MOS transistor with a parasitic diode.
The duty ratio of the switch tube S0 is adjusted through the PWM width adjusting device or the driving voltage of the switch tube S0 is adjusted through the voltage control device, so that the loop impedance of i2 is changed, and the size of i2 is changed.
In summary, after the inverters 1 are connected in parallel, when i2 of each inverter 1 is not equal, i1 of each inverter 1 is equal and i2 of each inverter 1 is equal through the current sharing control of the voltage regulator and the control of the switch tube S0, so that the sum of positive and negative currents of the same inverter 1 is zero, the circulation current between the inverters 1 is reduced, and the service life of the inverter 1 is prolonged.
EXAMPLE III
The third embodiment is performed on the basis of the first embodiment or the second embodiment, specifically referring to fig. 1, fig. 2, fig. 3, and fig. 4, wherein the voltage transformation module 2 includes x first voltage transformation units 21, x of the first voltage transformation units 21 may be greater than or equal to 1, and the first voltage transformation units 21 are sequentially connected in series between the power input end and the voltage output end, so as to implement one-stage or multi-stage DC-DC conversion.
Referring to fig. 4, the first transforming unit 21 includes an inductor L1, a switching tube S1, a diode D7, and a capacitor C1.
The switch tube S1 can be any one of MOSFET, IGBT, GaN, and triode, and is preferably a depletion type N-MOSFET. The switch tube S1 has a control end, a forward end and a reverse end, the control end is connected to the PWM width adjusting device, the voltage of the forward end is higher than that of the reverse end, that is, the control end, the forward end and the reverse end of the switch tube S1 may correspond to the gate, the drain and the source of the depletion type N-MOSFET.
One end of the inductor L1 is a positive input end of the first transforming unit 21, the other end of the inductor L1 is coupled to the anode of the diode D7, the positive end of the switch tube S1 is coupled to the anode of the diode D7, the negative input end and the negative output end of the first transforming unit 21 are both coupled to the reverse end of the switch tube S1, two ends of the capacitor C1 are respectively coupled to the cathode of the diode D7 and the reverse end of the switch tube S1, and the cathode of the diode D7 is the positive output end of the first transforming unit 21.
Referring to fig. 4, when there are a plurality of first transforming units 21, the first transforming units 21 are connected in series in sequence, and referring to fig. 1 and 2, the cathodes of the diodes D1 in the rectifying module 42 are both coupled to the positive input terminal of the first-stage first transforming unit 21; the cathode of the diode D7 in the xth-stage first transforming unit 21 is coupled to the positive terminal interface, and the reverse terminal of the switching tube S1 in the xth-stage first transforming unit 21 is coupled to the forward terminal of the switching tube S0, so as to implement multi-stage DC-DC conversion.
Example four
The fourth embodiment is performed on the basis of the first embodiment or the second embodiment, specifically referring to fig. 1, fig. 2, fig. 3 and fig. 5, wherein the voltage transformation module 2 includes x first voltage transformation units 21, x of the first voltage transformation units 21 may be greater than or equal to 1, and the first voltage transformation units 21 are sequentially connected in series between the power input end and the voltage output end, so as to implement one-stage or multi-stage DC-DC conversion.
Referring to fig. 5, the first transforming unit 21 may include an inductor L3, a diode D9, a switching tube S3, a capacitor C3., and a switching tube S3 which may be any one of a MOSFET, an IGBT, GaN, and a triode, preferably, a depletion type N-MOSFET, the switching tube S3 has a control terminal, a forward terminal, and a reverse terminal, the control terminal is connected to the PWM width-adjusting device, and the voltage of the forward terminal is higher than that of the reverse terminal, that is, the control terminal, the forward terminal, and the reverse terminal of the switching tube S3 may correspond to the gate, the drain, and the source of the depletion type N-MOSFET.
The positive end of the switch tube S3 is the positive input end of the first transforming unit 21, the reverse end is coupled to one end of the inductor L3, the other end of the inductor L3 is the positive output end of the first transforming unit 21, the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the negative input end and the negative output end of the first transforming unit 21 are coupled to the anode of the diode D9, and two ends of the capacitor C3 are coupled to the anode of the diode D9 and the positive output end of the first transforming unit 21, respectively.
Referring to fig. 4, when there are a plurality of first transforming units 21, the first transforming units 21 are connected in series in sequence, referring to fig. 1 and 2, cathodes of the diodes D1 in the rectifying module 42 are both coupled to a positive input terminal of the first transforming unit 21 of the first stage, referring to fig. 3, one end of the inductor L3 in the first transforming unit 21 of the x-th stage, which is far away from a reverse terminal of the switching tube S3, is coupled to a positive interface, and an anode of the diode D9 in the first transforming unit 21 of the x-th stage is coupled to a positive terminal of the switching tube S0, thereby implementing multi-stage DC-DC conversion.
EXAMPLE five
The fifth embodiment is performed on the basis of the third embodiment, referring to fig. 1, fig. 2, fig. 3 and fig. 6, the transforming module 2 further includes a second transforming unit 22, a plurality of second transforming units 22 may be provided, the first transforming unit 21 and the second transforming unit 22 are connected in series between the power input end and the voltage output end, wherein the number and the arrangement manner of the first transforming unit 21 and the second transforming unit 22 are set according to the actual situation.
Referring to fig. 6 in particular, in fig. 6, a case that one first transforming unit 21 is connected in series with one second transforming unit 22 is shown, the second transforming unit 22 may include an inductor L3, a diode D9, a switching tube S3, a capacitor C3., and a switching tube S3 may be any one of MOSFET, IGBT, GaN, and a triode, and is preferably a depletion type N-MOSFET, the switching tube S3 has a control end, a forward end, and a reverse end, the control end is connected to the PWM width-adjusting device, and the voltage of the forward end is higher than that of the reverse end, that is, the control end, the forward end, and the reverse end of the switching tube S3 may correspond to the gate, the drain, and the source of the depletion type N-MOSFET.
Referring to fig. 2 and 6, one end of the inductor 1 away from the diode 7 may be coupled to a positive output end of the rectification module 42, a reverse end of the switching tube S1 is coupled to a negative output end of the rectification module 42, a forward end of the switching tube S3 is a positive input end of the second transforming unit 22 and is coupled to a cathode of the diode 7, a reverse end of the switching tube S3 is coupled to one end of the inductor L3, the other end of the inductor L3 is a positive output end of the second transforming unit 22 and is coupled to a positive interface, a cathode of the diode D9 is coupled to a reverse end of the switching tube S3, an anode of the diode 9 is a negative input end and a negative output end of the second transforming unit 22 and is coupled to a reverse end of the switching tube S1, and two ends of the capacitor C3 are coupled to an anode of the diode D9 and a positive output end of the second transforming unit 22, respectively, so that the rectification module 42 delivers a DC voltage from a DC input end of the power supply to the transforming module 2, passes through a first stage of the first transforming unit 21 and then passes through a second stage DC.
EXAMPLE six
A sixth embodiment provides a DCDC circulation control method that can employ the circulation control apparatus described above to quickly adjust the current value of each i1, i 2.
Referring to fig. 1 and 7, the DCDC circulation control method includes the steps of:
and step S1, acquiring the total number of the converters 1 and setting the total number to N, wherein N is greater than or equal to 2.
Step S2, obtaining the current passing through the load R, setting the current as iout, and after the converters 1 are connected in parallel, the sum of the added values of i1 of the N converters 1 is equal to the value of iout, and the sum of the added values of i2 of the N converters 1 is also equal to the value of iout.
Step S3, the current i1 of the positive interface and the currents i2, i1 and i2 of the negative interface in each converter 1 are obtained through detection devices such as a transformer, an ammeter, an oscilloscope and various built sampling circuits.
Step S4, it is determined whether the value of current i1 and the value of current i2 of each converter 1 are equal to the value of iout divided by N (| iout/N |).
If not, synchronously controlling the voltage regulating device and the switch tube S0 to enable the values of i1 and i2 in each converter 1 to be equal to the value of iout divided by N (| iout/N |).
That is, when | i2| > | iout/N | the value corresponding to i2 can be decreased by the PWM width-adjusting device or the voltage control device of the switching tube S0; that is, when | i2| < | iout/N |, the value corresponding to i2 can be increased by the PWM width-adjusting device or the voltage control device of the switching tube S0; when | i1| > | iout/N |, the output voltage of the strain converter 1 may be changed by the voltage adjusting device, so that | i1| is decreased; when | i1| < | iout/N |, the output voltage of the strain converter 1 can be changed by the voltage adjustment device, so that | i1| is increased.
And step S5, ending the operation.
By the circulating current control method, the | i1| ═ i2| ═ iout/N | of the same converter 1 can be obtained finally, and the values of i1 and i2 between the converters 1 are equal, so that after the converters 1 are connected in parallel, the positive and negative currents of the same converter 1 are equal, and no circulating current exists between the converters 1, the probability of uneven heating of the converters 1 is reduced, and the service life of the converters 1 is prolonged.
EXAMPLE seven
Fig. 8 is a schematic structural diagram of an electronic apparatus according to a seventh embodiment of the present invention, and as shown in fig. 8, the electronic apparatus 5 includes a processor 51, a memory 52, an input device 53, and an output device 54; the number of the processors 51 in the computer device may be one or more, and one processor 51 is taken as an example in fig. 8; the processor 51, the memory 52, the input device 53 and the output device 54 in the electronic apparatus 5 may be connected by a bus or other means, and the bus connection is exemplified in fig. 8.
The memory 52 is a computer-readable storage medium that can be used to store software programs, computer-executable programs, and modules, such as the DCDC circulation control method in the embodiment of the present invention. The processor 51 executes various functional applications and data processing of the electronic device 5 by executing software programs, instructions and modules stored in the memory 52, that is, implements the DCDC circulation control method of the sixth embodiment.
The memory 52 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 52 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 52 may further include memory located remotely from the processor 51, which may be connected to the electronic device 5 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 53 is connected with the corresponding detection equipment and is used for receiving corresponding data; the output device 54 outputs a corresponding instruction, and the switching tube S0 executes the corresponding instruction corresponding to the PWM width adjusting device or the voltage control device or the voltage adjusting device.
Example eight
An eighth embodiment of the present invention further provides a computer-readable storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the above-mentioned DCDC circulation control method, including:
acquiring the total number of the converters 1 and setting the total number as N;
acquiring current passing through a load R and setting the current as iout;
acquiring current i1 and current i2 of each converter 1;
and judging whether the values of the current i1 and the current i2 of each converter 1 are equal to the value of iout divided by N, if not, enabling the values of i1 and i2 to be equal to the value of iout divided by N through the current sharing control and regulation module 3.
Of course, the embodiments of the present invention provide a computer-readable storage medium whose computer-executable instructions are not limited to the above method operations.
Based on the understanding that the technical solutions of the present invention can be embodied in the form of software products, such as floppy disks, Read-only memories (ROMs), Random Access Memories (RAMs), flash memories (F L ASHs), hard disks or optical disks of a computer, and the like, which can store instructions for causing an electronic device (such as a mobile phone, a personal computer, a server, or a network device) to execute the methods of the embodiments of the present invention, the embodiments of the present invention can be implemented by software and necessary general hardware, but the foregoing embodiments are also better implemented in many cases.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (9)

1. A DCDC circulation control apparatus comprising a load R, at least 2 converters, each of said converters comprising:
the power supply input end is connected with a direct current source and receives voltage which is formed by the direct current source and needs to be converted;
the voltage transformation module is connected between a power supply input end and a voltage output end and is used for transforming the voltage received by the power supply input end and outputting the transformed voltage to the voltage output end;
the voltage output end is connected to the output end of the voltage transformation module, the voltage output end comprises a positive electrode interface and a negative electrode interface, and the positive input end of the power supply input end is connected to one end of a load R through the voltage transformation module and the positive electrode interface; the negative input end of the power supply input end is connected to the other end of the load R through the voltage transformation module and the negative interface; the current flowing through the positive electrode interface is set to be i1, and the current flowing through the negative electrode interface is set to be i 2;
the adjusting module is connected in series with the negative output end of the voltage transformation module and is used for adjusting i2, and the current sharing control and adjusting module enables i1 of different converters to be equal and enables i2 of different converters to be equal;
the regulating module comprises a switch tube S0, the switch tube S0 has a control end, a forward end and a reverse end, the voltage of the forward end is higher than that of the reverse end, the control end of the switch tube S0 is respectively coupled to the PWM width-adjusting device or the voltage control device, the forward end of the switch tube S0 is coupled to the negative output end of the voltage transformation module, and the reverse end of the switch tube S0 is coupled to the negative interface.
2. A circulation control apparatus according to claim 1, wherein the dc power source includes an ac power source and a rectifying module, and the ac power source forms the power input terminal via the rectifying module.
3. The DCDC circulation control device according to any of claims 1-2, wherein the transforming module comprises at least one first transforming unit, and the first transforming unit is connected in series between the power input terminal and the voltage output terminal.
4. The DCDC circulation control device of claim 3, wherein said first transforming unit comprises an inductor L1, a switch tube S1, a diode D7, and a capacitor C1, said switch tube S1 has a control terminal, a forward terminal and a reverse terminal, the control terminal is connected to the PWM widening device, the voltage of the forward terminal is higher than that of the reverse terminal,
one end of the inductor L1 is a positive input end of the first transforming unit, the other end of the inductor L1 is coupled to an anode of a diode D7, a cathode of the diode D7 is a positive output end of the first transforming unit, a forward end of the switch tube S1 is coupled to an anode of a diode D7, a negative input end and a negative output end of the first transforming unit are both coupled to a reverse end of the switch tube S1, and two ends of the capacitor C1 are respectively coupled to a cathode of the diode D7 and a reverse end of the switch tube S1.
5. The DCDC circulation control device of claim 3,
the first transforming unit comprises an inductor L3, a switching tube S3, a diode D9 and a capacitor C3, wherein the switching tube S3 has a control end, a forward end and a reverse end, the control end is connected to the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the positive end of the switch tube S3 is the positive input end of the first transforming unit, the reverse end is coupled to one end of an inductor L3, the other end of the inductor L3 is the positive output end of the first transforming unit, the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the negative input end and the negative output end of the first transforming unit are both coupled to the anode of the diode D9, and two ends of the capacitor C3 are respectively coupled to the anode of the diode D9 and the positive output end of the first transforming unit.
6. The DCDC circulation control device of claim 4, wherein said transforming module further comprises at least a second transforming unit, said first transforming unit and said second transforming unit are connected in series between said power input terminal and said voltage output terminal,
the second transforming unit comprises an inductor L3, a switching tube S3, a diode D9 and a capacitor C3, the switching tube S3 has a control end, a forward end and a reverse end, the control end is connected to the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the positive end of the switch tube S3 is the positive input end of the second transforming unit, the reverse end is coupled to one end of an inductor L3, the other end of the inductor L3 is the positive output end of the second transforming unit, the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the negative input end and the negative output end of the second transforming unit are both coupled to the anode of the diode D9, and two ends of the capacitor C3 are coupled to the anode of the diode D9 and the positive output end of the second transforming unit, respectively.
7. A DCDC circulation control method characterized by using the circulation control apparatus according to any one of claims 1 to 6, comprising:
acquiring the total number of converters and setting the total number as N;
acquiring current passing through a load R and setting the current as iout;
acquiring current i1 and current i2 of each converter;
and judging whether the values of the current i1 and the current i2 of each converter are equal to the value of iout divided by N, if not, enabling the values of i1 and i2 to be equal to the value of iout divided by N through the current sharing control and regulation module.
8. An electronic device comprising a processor, a storage medium, and a computer program, the computer program being stored in the storage medium, wherein the computer program, when executed by the processor, implements the DCDC circulation control method of claim 7.
9. A computer-readable storage medium on which a computer program is stored, the computer program realizing the DCDC circulation control method according to claim 7 when executed by a processor.
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