CN110311563B - 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 PDFInfo
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- CN110311563B CN110311563B CN201910692176.0A CN201910692176A CN110311563B CN 110311563 B CN110311563 B CN 110311563B CN 201910692176 A CN201910692176 A CN 201910692176A CN 110311563 B CN110311563 B CN 110311563B
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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
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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
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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
- 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
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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
- H02M1/0067—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: a power supply input terminal; the voltage output end comprises a positive electrode interface and a negative electrode interface, the current flowing through the positive electrode interface is set as i1, and the current flowing through the negative electrode interface is set as i 2; the first module is connected between the power supply input end and the second module and used for adjusting the current value of i 1; and the second module is used for forming a second-stage DC-DC conversion and regulating the current value of i2, the power supply input ends of the converters are all coupled to a direct current source, the positive electrode interfaces of the converters are all coupled to one end of a load R, the negative electrode interfaces of the converters are all coupled to the other end of the load R, i1 of different converters are equal through the first module and the second module, and i2 of different converters are equal. The invention also provides a DCDC circulation control method, electronic equipment and a computer readable storage medium.
Description
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 high generally, 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 objects of the present invention is to provide a DCDC circulation control device, which makes i1 of different converters equal through a first module and a second module, i2 of different converters equal, 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 output end outputs the converted voltage, the voltage output end comprises a positive electrode interface and a negative electrode 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 first module is connected between the power supply input end and the second module and used for forming first-stage DC-DC conversion and adjusting the current value of the i 1;
a second module connected between the first module and the voltage output terminal for forming a second stage of DC-DC conversion and adjusting the current value of i2,
the power supply input ends of the converters are all coupled to a direct current source, the positive electrode interfaces of the converters are all coupled to one end of a load R, the negative electrode interfaces of the converters are all coupled to the other end of the load R, and the sum of i1 and i2 of the same converter is made to be zero through the first module and the second module.
Further, the first module comprises an inductor L1, a switching tube S1, a diode D7, and a capacitor C1, the switching tube S1 has a control terminal, a forward terminal and a reverse terminal, the control terminal is connected to the PWM width adjusting device, the voltage of the forward terminal is higher than that of the reverse terminal,
one end of the inductor L1 is coupled to the anode of the power input end, and the other end is coupled to the anode of the diode D7; the forward end of the switch tube S1 is coupled to the anode of the diode D7, and the reverse end is coupled to the cathode of the power input end; two ends of the capacitor C1 are respectively coupled to the cathode of the diode D7 and the reverse end of the switching tube S1; the cathode of the diode D7 and the reverse end of the switch tube S1 are coupled to the positive input end and the negative input end of the second module, respectively.
Further, the first module comprises an inductor L3, a switching tube S3, a diode D9, and a capacitor C3, 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, the voltage of the forward terminal is higher than that of the reverse terminal,
the forward end of the switch tube S3 is coupled to the positive electrode of the power input end, the reverse end is coupled to one end of the inductor L3, and the other end of the inductor L3 is coupled to the positive input end of the second module; the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the anode is coupled to the negative electrode of the power input end and the negative output end of the second module, and two ends of the capacitor C3 are coupled to the anode of the diode D9 and the positive input end of the second module, respectively.
Further, the second module comprises an inductor L2, a diode D8, a switching tube S2, and a capacitor C2, the switching tube S2 has a control terminal, a forward terminal and a reverse terminal, the control terminal is connected to the PWM width adjusting device, the voltage of the forward terminal is higher than that of the reverse terminal,
the forward end of the switch tube S2 is coupled to the anode of the diode D8, and the reverse end of the switch tube S2 is coupled to the negative output end of the first module; the cathode of the diode D8 is coupled to the positive output terminal and the positive interface of the first module; one end of the inductor L2 is coupled to the anode of the diode D8, and the other end is coupled to the negative interface; two ends of the capacitor C2 are respectively coupled to the positive electrode interface and the negative electrode interface.
Further, the second module comprises an inductor L4, a diode D10, a switching tube S4, and a capacitor C4, the switching tube S4 has a control terminal, a forward terminal and a reverse terminal, the control terminal is connected to the PWM width adjusting device, the voltage of the forward terminal is higher than that of the reverse terminal,
one end of the inductor L4 is coupled to the negative output end of the first module, and the other end is coupled to the reverse end of the switch tube S4; the positive end of the switch tube S4 is coupled to the positive output end and the positive electrode interface of the first module; the diode D10 has a cathode coupled to the reverse end of the switch tube S4, an anode coupled to the negative terminal, and a capacitor C4 having two ends coupled to the positive terminal and the negative terminal, respectively.
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.
It is another object of the present invention to provide a DCDC circulation control method for rapidly controlling the values of i1 and i2 of each converter to be equal, thereby reducing circulation between converters and reducing the probability of device damage in the converters.
The third 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 value of the current i1 and the value of the current i2 in each converter are equal to the value of iout divided by N, and if not, synchronously controlling the corresponding first module and second module to enable the values of i1 and i2 in each converter to be equal to the value of iout divided by N.
It is a third object of the present invention to provide an electronic device comprising a processor, a storage medium, and a computer program stored in the storage medium, which when executed by the processor implements 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 third 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 circulating flow control device, i1 of different converters is equal and i2 of different converters is equal through the first module and the second module, namely the sum of i1 and i2 of the same converter is zero, so that circulating flow between 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 first module of a second DCDC circulation control device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a first module of a third DCDC circulation control device in accordance with an embodiment of the present invention;
FIG. 4 is a circuit diagram of a second module of a four DCDC circulation control device in accordance with an embodiment of the present invention;
FIG. 5 is a circuit diagram of a second module of a five DCDC circulation control device in accordance with an embodiment of the present invention;
fig. 6 is a circuit diagram of a dc source of a six DCDC circulation control arrangement in accordance with an embodiment of the present invention;
fig. 7 is a block flow diagram of a DCDC circulation control method according to a seventh embodiment of the present invention;
fig. 8 is a block diagram of an electronic device according to an eighth embodiment of the present invention.
In the figure: 1. a converter; 2. a first module; 3. a second 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
In the first embodiment, after the inverters 1 are connected in parallel, i1 of different inverters 1 are equal through the first module 2 and the second module 3, i2 of different inverters 1 are equal, that is, the sum of i1 and i2 of the same inverter 1 is zero, so that the circulation between the inverters 1 can be reduced, the probability of damage to devices in the inverter 1 is reduced, and the service life of the inverter 1 is prolonged.
Specifically, referring to fig. 1, the DCDC circulation control apparatus described above includes an inverter 1 and a load R, where the inverter 1 is provided in at least 2. The converter 1 has a power input, a voltage output, a first module 2, a second module 3, the voltage output having a positive interface and a negative interface. The power input end is connected with the direct current source 4 and receives the voltage which is formed by the direct current source 4 and needs to be converted, and the voltage is direct current voltage.
The voltage output end can be connected with external equipment to supply power to the external equipment. The voltage output end comprises a positive electrode interface and a negative electrode interface, the current flowing from the positive electrode interface to the external equipment is set to be i1, and the current flowing from the external equipment to the negative electrode interface is set to be i 2.
The first module 2 is connected between the power supply input end and the second module 3 and is used for forming a first-stage DC-DC conversion, and the first module 2 is also used for adjusting the current value of i 1; the second module 3 is connected between the first module 2 and the voltage output terminal and is used for forming a second stage of DC-DC conversion, and the second module 3 is also used for adjusting the current value of i 2.
The power input end of each converter 1 is coupled to the dc source 4, the positive interface of each converter 1 is coupled to one end of the load R, and the negative interface of each converter 1 is coupled to the other end of the load R, so that the parallel connection of the converters 1 is realized. I1 of different converters 1 are made equal by the first module 2 and the second module 3, i2 of different converters 1 are equal, i.e. the sum of i1 and i2 of the same converter 1 is zero. Thereby, the circulating current between the transducers 1 can be reduced to reduce the probability of the damage of the devices in the transducers 1.
Example two
The second embodiment is performed on the basis of the first embodiment, and referring to fig. 1 and fig. 2, a DCDC circulation control device is provided, which implements a first-stage DC-DC conversion on a voltage to be converted, and further implements i1 adjustment through the first module 2.
The first module 2 may include an inductor L1, a switching tube S1, a diode D7, and a capacitor C1. One end of the inductor L1 is coupled to the positive electrode of the power output terminal, and the other end is coupled to the anode of the diode D7.
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 coupled to the positive electrode of the power input end, and the other end is coupled to the anode of the diode D7; the forward end of the switch tube S1 is coupled to the anode of the diode D7, and the reverse end is coupled to the cathode of the power input end; two ends of the capacitor C1 are respectively coupled to the cathode of the diode D7 and the reverse end of the switching tube S1; the cathode of the diode D7 and the reverse terminal of the switch tube S1 are respectively coupled to the positive input terminal and the negative input terminal of the second module 3.
Among them, the capacitor C1 is preferably an electrolytic capacitor, which has the advantages of large capacitance and low cost, and when installed, the positive plate of the electrolytic capacitor is coupled to the cathode of the diode D7, and the negative plate is coupled to the reverse terminal of the switching tube S1.
The duty ratio of the switching tube S1 is adjusted by adjusting the PWM width adjusting device connected to the switching tube S1, so as to adjust the voltage across the capacitor C1, thereby implementing adjustment of i1, so that i1 of each converter 1 is equal, i.e. the value and direction of i1 in each converter 1 are equal.
EXAMPLE III
Third embodiment is performed on the basis of the first embodiment, and referring to fig. 1 and fig. 3, a DCDC circulating current control device is provided, which implements a first stage DC-DC conversion on the voltage to be converted, and also implements the adjustment of i1 through the first module 2, respectively.
The first module 2 includes an inductor L3, a switching tube S3, a diode D9, and a capacitor C3.
The switch tube S3 can be any one of MOSFET, IGBT, GaN, and triode, and is preferably a depletion type N-MOSFET. The switch 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, that is, the control end, the forward end and the reverse end of the switch tube S3 may correspond to the gate, the drain and the source of the depletion type N-MOSFET.
The forward end of the switch tube S3 is coupled to the positive electrode of the power input end, the reverse end is coupled to one end of the inductor L3, and the other end of the inductor L3 is coupled to the positive input end of the second module 3; the diode D9 has a cathode coupled to the inverted terminal of the switch tube S3, and an anode coupled to the negative terminal of the power input terminal and the negative output terminal of the second module 3.
The capacitor C3 is preferably an electrolytic capacitor with the advantages of large capacitance and low cost, and when installed, the positive plate of the electrolytic capacitor is coupled to the end of the inductor L3 away from the switch S3, and the negative plate is coupled to the anode of the diode D9.
The duty ratio of the switching tube S3 is adjusted by adjusting the PWM width adjusting device connected to the switching tube S3, so as to adjust the voltage across the capacitor C3, thereby implementing adjustment of i1, so that i1 of each converter 1 is equal, i.e. the value and direction of i1 in each converter 1 are equal.
Example four
The fourth embodiment is performed on the basis of the first embodiment or the second embodiment or the third embodiment, and referring to fig. 1 and 4, a DCDC circulation control device is provided, which implements the second stage DC-DC conversion on the voltage output by the first module 2 and also implements the adjustment on i2 through the second module 3 respectively.
The second module 3 may include an inductor L2, a switching tube S2, a diode D8, and a capacitor C2.
The switch tube S2 can be any one of MOSFET, IGBT, GaN, and triode, and is preferably a depletion type N-MOSFET. The switch tube S2 has a control end, a forward end and a reverse end, wherein 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 S2 correspond to the gate, the drain and the source of the depletion type N-MOSFET.
The forward terminal of the switch tube S2 is coupled to the anode of the diode D8, the reverse terminal is coupled to the negative output terminal of the first module 2, the cathode of the diode D8 is coupled to the positive output terminal of the first module 2, and one terminal of the inductor L2 is coupled to the forward terminal of the switch tube S2.
One end of the capacitor C2 is coupled to the cathode of the diode D8, and the other end is coupled to an end of the inductor L2 away from the switching tube S2, that is, the capacitor C2 is connected in parallel between the positive terminal interface and the negative terminal interface. Capacitor C2 is preferably an electrolytic capacitor having a large capacitance and low cost, and when installed, the positive plate of the electrolytic capacitor is coupled to the positive terminal and the negative plate is coupled to the negative terminal.
The duty ratio of the switching tube S2 is adjusted by adjusting the PWM width adjusting device connected to the switching tube S2, so as to adjust the voltage across the capacitor C2, thereby implementing adjustment of i2, so that i2 of each converter 1 is equal, i.e. the value and direction of i2 in each converter 1 are equal.
EXAMPLE five
The fifth embodiment is performed on the basis of the first embodiment or the second embodiment or the third embodiment, and referring to fig. 1 and 5, a DCDC circulation control device is provided, which implements the second stage DC-DC conversion on the voltage output by the first module 2 and also implements the adjustment on i2 through the second module 3 respectively.
The second module 3 includes an inductor L4, a diode D10, a switch tube S4, and a capacitor C4. The switch tube S4 can be any one of MOSFET, IGBT, GaN, and triode, and is preferably a depletion type N-MOSFET. The switch tube S4 has a control terminal, a forward terminal and a reverse terminal, wherein the voltage of the forward terminal is higher than that of the reverse terminal.
One end of the inductor L4 is coupled to the negative output terminal of the first module 2, and the other end is coupled to the inverting terminal of the switching tube S4; the positive end of the switch tube S4 is coupled to the positive output end and the positive interface of the first module 2; the diode D10 has a cathode coupled to the reverse terminal of the switch tube S4 and an anode coupled to the negative terminal.
The capacitor C4 is connected in parallel between the positive and negative interfaces. Capacitor C4 is preferably an electrolytic capacitor having a large capacitance and low cost, and when installed, the positive plate of the electrolytic capacitor is coupled to the positive terminal and the negative plate is coupled to the negative terminal.
The duty ratio of the switching tube S4 is adjusted by adjusting the PWM width adjusting device connected to the switching tube S4, so as to adjust the voltage across the capacitor C4, thereby implementing adjustment of i2, so that i2 of each converter 1 is equal, i.e. the value and direction of i2 in each converter 1 are equal.
EXAMPLE six
The sixth embodiment may be implemented on the basis of any one of the first to fifth embodiments, and provides a DCDC circulation control apparatus, specifically, referring to fig. 1 and 6, the dc source 4 may be configured as a dc power source, or may be configured as a combination of an ac power source 41 and a rectification module 42, where the ac power source 41 forms a power input terminal via the rectification module 42.
Referring to fig. 6, the AC power source 41 may be provided as multi-phase AC power or single phase AC power, the AC power source 41 in fig. 6 is provided as three-phase AC power, and the rectifying module 42 may include a plurality of diodes D1 and a diode D2, wherein each of the diodes D1 and D2 may be provided in three, to correspond to the three-phase AC power. The anodes of the diodes D1 are coupled to the corresponding interfaces of the ac power source 41 in a one-to-one correspondence, and the cathodes are coupled in a corresponding correspondence; the cathodes of the diodes D2 are respectively coupled to the anodes of the corresponding diodes D1, and the anodes are correspondingly coupled.
The number of the rectifying modules 42 is the same as that of the converter 1, and the rectifying modules 42 are arranged in a one-to-one correspondence, cathodes of the diodes D1 in the rectifying modules 42 are coupled to a positive input end of the first module 2 in the converter 1, and anodes of the diodes D2 in the rectifying modules 42 are coupled to a negative input end of the first module 2, so that the direct current is output from the rectifying modules 42.
EXAMPLE seven
Embodiment seven is to provide a circulation control method, which can adopt the circulation control device described above to rapidly adjust the current value of each i1, i2, with reference to fig. 1 and 7.
The circulation control method comprises the following steps:
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.
In 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, the corresponding first module 2 and second module 3 are synchronously controlled to make the values i1 and i2 of each converter 1 equal to the value of iout divided by N (| iout/N |).
I.e. when i2 | > | iout/N | the corresponding device may be controlled to change the voltage of the capacitor C2 or C4, so that the corresponding voltage across the capacitor C2 or C4 decreases, thereby decreasing | i2 | to equal | iout/N |; when | i2 | < | iout/N |, the corresponding device may be controlled to change the voltage of the capacitor C2 or C4, so that the voltage across the capacitor C2 or C4 increases correspondingly, and | i2 | increases to equal | iout/N |; when | i1 | > | iout/N |, the corresponding device may be controlled to change the voltage of the capacitor C1 or C3, so that the voltage across the capacitor C1 or C3 decreases correspondingly, thereby decreasing | i1 | to equal | iout/N |; when | i1 | < | iout/N |, the corresponding device may be controlled to change the voltage of the capacitor C1 or C3, so that the voltage across the capacitor C1 or C3 increases correspondingly, thereby causing | i1 | to increase to equal | iout/N |.
And step S5, ending the operation.
By the circulating current control method, finally, the | i1 | i2 | iout/N | of the same converter 1 can be obtained, 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 current and the negative current of the same converter 1 are equal, and no circulating current exists between the converters 1, so that the probability of non-uniform heating of the converter 1 is reduced, and the service life of the converter 1 is prolonged.
Example eight
Fig. 8 is a schematic structural diagram of an electronic apparatus according to an eighth 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. 4; 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 circulation control apparatus 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 seventh 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 corresponding instructions, and the capacitor C1 and the capacitor C2 correspond to control equipment to execute the corresponding instructions.
Example nine
An 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 value of the current i1 and the value of the current i2 in each converter 1 are equal to the value of iout divided by N, and if not, synchronously controlling the corresponding first module 2 and second module 3 to enable the values of i1 and i2 in each converter 1 to be equal to the value of iout divided by N.
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.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-only memory (ROM), a Random Access Memory (RAM), a FLASH memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling an electronic device (which may be a mobile phone, a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
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 (5)
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 output end outputs the converted voltage, the voltage output end comprises a positive electrode interface and a negative electrode 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 first module is connected between the power supply input end and the second module and used for forming first-stage DC-DC conversion and adjusting the current value of the i 1;
a second module connected between the first module and the voltage output terminal for forming a second stage of DC-DC conversion and adjusting the current value of i2,
the power supply input ends of the converters are all coupled to a direct current source, the positive electrode interfaces of the converters are all coupled to one end of a load R, the negative electrode interfaces of the converters are all coupled to the other end of the load R, i1 of different converters are equal through the first module and the second module, and i2 of different converters are equal;
the first module adopts a first primary circuit or a first secondary circuit, and the second module adopts a second primary circuit or a second secondary circuit;
the first circuit comprises an inductor L1, a switching tube S1, a diode D7 and a capacitor C1, wherein the switching tube S1 is provided with a control end, a forward end and a reverse end, the control end is connected with 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 coupled to the anode of the power input end, and the other end is coupled to the anode of the diode D7; the forward end of the switch tube S1 is coupled to the anode of the diode D7, and the reverse end is coupled to the cathode of the power input end; two ends of the capacitor C1 are respectively coupled to the cathode of the diode D7 and the reverse end of the switching tube S1; the cathode of the diode D7 and the reverse end of the switch tube S1 are respectively coupled to the positive input end and the negative input end of the second module;
the first secondary circuit comprises an inductor L3, a switching tube S3, a diode D9 and a capacitor C3, wherein the switching tube S3 is provided with a control end, a forward end and a reverse end, the control end is connected with the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the forward end of the switch tube S3 is coupled to the positive electrode of the power input end, the reverse end is coupled to one end of the inductor L3, and the other end of the inductor L3 is coupled to the positive input end of the second module; the cathode of the diode D9 is coupled to the reverse end of the switch tube S3, the anode is coupled to the negative electrode of the power input end and the negative input end of the second module, and two ends of the capacitor C3 are coupled to the anode of the diode D9 and the positive input end of the second module, respectively;
the second circuit comprises an inductor L2, a diode D8, a switch tube S2 and a capacitor C2, wherein the switch tube S2 is provided with a control end, a forward end and a reverse end, the control end is connected with the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
the forward end of the switch tube S2 is coupled to the anode of the diode D8, and the reverse end of the switch tube S2 is coupled to the negative output end of the first module; the cathode of the diode D8 is coupled to the positive output terminal and the positive interface of the first module; one end of the inductor L2 is coupled to the anode of the diode D8, and the other end is coupled to the negative interface; two ends of the capacitor C2 are respectively coupled with the positive electrode interface and the negative electrode interface;
the second circuit comprises an inductor L4, a diode D10, a switch tube S4 and a capacitor C4, wherein the switch tube S4 is provided with a control end, a forward end and a reverse end, the control end is connected with the PWM width-adjusting device, the voltage of the forward end is higher than that of the reverse end,
one end of the inductor L4 is coupled to the negative output end of the first module, and the other end is coupled to the reverse end of the switch tube S4; the positive end of the switch tube S4 is coupled to the positive output end and the positive electrode interface of the first module; the diode D10 has a cathode coupled to the reverse end of the switch tube S4, an anode coupled to the negative terminal, and a capacitor C4 having two ends coupled to the positive terminal and the negative terminal, respectively.
2. The DCDC circulation control apparatus of claim 1, wherein the dc source comprises an ac power source and a rectifying module, the ac power source forming the power input terminal via the rectifying module.
3. A DCDC circulation control method characterized by using the DCDC circulation control apparatus according to claim 1 or 2, 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 value of the current i1 and the value of the current i2 in each converter are equal to the value of iout divided by N, and if not, synchronously controlling the corresponding first module and second module to enable the values of i1 and i2 in each converter to be equal to the value of iout divided by N.
4. 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 3.
5. A computer-readable storage medium on which a computer program is stored, the computer program realizing the DCDC circulation control method according to claim 3 when executed by a processor.
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| CN201910692176.0A CN110311563B (en) | 2019-07-29 | 2019-07-29 | DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium |
| PCT/CN2019/128544 WO2021017390A1 (en) | 2019-07-29 | 2019-12-26 | Dcdc circulation control apparatus and control method, electronic device, and medium |
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| CN201910692176.0A CN110311563B (en) | 2019-07-29 | 2019-07-29 | DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium |
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| CN110311563B (en) * | 2019-07-29 | 2021-05-07 | 杭州中恒电气股份有限公司 | DCDC circulation control device, DCDC circulation control method, electronic apparatus, and medium |
| CN113978256B (en) * | 2021-11-10 | 2023-10-20 | 华人运通(江苏)技术有限公司 | Control method, device and equipment for double DCDC of electric automobile and storage medium |
| CN114726044A (en) * | 2022-04-19 | 2022-07-08 | 华为数字能源技术有限公司 | Power module, charging pile and power supply equipment |
| CN115632545B (en) * | 2022-12-06 | 2023-03-21 | 深圳市永联科技股份有限公司 | Control method and system for power supply circulation |
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| WO2021017390A1 (en) | 2021-02-04 |
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Application publication date: 20191008 Assignee: Hangzhou Fuyang Zhongheng Electric Co.,Ltd. Assignor: HANGZHOU ZHONHEN ELECTRIC Co.,Ltd. Contract record no.: X2021330000442 Denomination of invention: DCDC circulating current control device, control method, electronic equipment, medium Granted publication date: 20210507 License type: Common License Record date: 20211018 |
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