CN112928807A - Double-circuit transformer parallel control circuit - Google Patents
Double-circuit transformer parallel control circuit Download PDFInfo
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- CN112928807A CN112928807A CN202110117728.2A CN202110117728A CN112928807A CN 112928807 A CN112928807 A CN 112928807A CN 202110117728 A CN202110117728 A CN 202110117728A CN 112928807 A CN112928807 A CN 112928807A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a two-way transformer parallel control circuit, which comprises a first Type circuit, a second Type circuit and a parallel control unit, wherein the first Type circuit is connected with the first Type circuit; the first Type circuit and the second Type circuit are electrically connected with the parallel control unit to form a parallel control circuit; the first Type circuit and the second Type circuit are used for detecting the inserted PD equipment and judging whether the PD equipment belongs to single-circuit insertion equipment or double-circuit insertion equipment; when the single circuit plug-in equipment belongs to the single circuit plug-in equipment, detecting whether the power of the single circuit plug-in equipment reaches a preset voltage range, and controlling the first Type circuit and the second Type circuit to be connected in parallel when the power of the single circuit plug-in equipment reaches the preset voltage range, and controlling the balanced output current through the first Type circuit and the second Type circuit; when the dual-circuit plug-in device belongs to the dual-circuit plug-in device, the first Type circuit and the second Type circuit respectively output current independently.
Description
Technical Field
The invention relates to the technical field of charging, in particular to a parallel control circuit of a double-circuit transformer.
Background
At present, with the rapid development of consumer electronics technology, the charging requirement for point electronic devices is higher and higher, and the rapid charging with high power, high efficiency and multi-port output is a future trend.
The multi-port charger in the market at present, as shown in fig. 2, is limited by the topology of the scheme, and has the following problems:
(1) through AC-DC conversion, and multiple DC-DC output ports are used, so that the conversion efficiency is low;
(2) the scheme has low conversion efficiency and is difficult to treat the temperature rise problem;
(3) the charging requirements of a notebook computer, a tablet computer, a mobile phone and the like cannot be considered simultaneously.
Disclosure of Invention
The invention provides a two-way transformer parallel control circuit which is used for solving the problems that the conversion efficiency of the existing multi-port charger is low, the temperature rise problem is difficult to process and the charging requirements of a notebook computer, a tablet computer, a mobile phone and the like cannot be met simultaneously by using a plurality of DC-DC output ports through AC-DC conversion.
A two-way transformer parallel control circuit comprises a first Type circuit, a second Type circuit and a parallel control unit;
the first Type circuit and the second Type circuit are electrically connected with the parallel control unit to form a parallel control circuit; wherein
The first Type circuit and the second Type circuit are used for detecting the inserted PD equipment and judging whether the inserted PD equipment belongs to single-circuit insertion equipment or double-circuit insertion equipment;
when the single circuit plug-in equipment belongs to the single circuit plug-in equipment, detecting whether the power of the single circuit plug-in equipment reaches a preset voltage range, and controlling the first Type circuit and the second Type circuit to be connected in parallel when the power of the single circuit plug-in equipment reaches the preset voltage range, and controlling the balanced output current through the first Type circuit and the second Type circuit;
when the dual-circuit plug-in device belongs to the dual-circuit plug-in device, the first Type circuit and the second Type circuit respectively output current independently.
As an embodiment of the present invention: the first Type circuit includes: the power supply comprises a first transformer, a first PWM controller, a first switch tube and a first Type interface;
the first transformer is electrically connected with the first PWM controller, and the first PWM controller is used for outputting voltage;
the first transformer is further electrically connected with the first switch tube, the first switch tube is electrically connected with the first Type interface, and the first Type interface is used for controlling voltage to be output to the first Type interface;
the first PWM controller is electrically connected with the first switch, the first switch is electrically connected with the first Type interface, and the first switch is used for detecting a first demand voltage of an insertion device with a first Type interface inserted and controlling the first PWM controller to output a voltage corresponding to the first demand voltage.
As an embodiment of the present invention: the second Type circuit includes: the second transformer, the second PWM controller, the second switch tube and the second Type interface;
the second transformer is electrically connected with the second PWM controller, and the second PWM controller is used for outputting voltage;
the second transformer is further electrically connected with the second switching tube, the second switching tube is electrically connected with the second Type interface, and the second Type interface is used for controlling voltage to be output to the second Type interface;
the second PWM controller is electrically connected with the second switch, the second switch is electrically connected with the second Type interface, and the second switch is used for detecting the second demand voltage of the insertion equipment inserted into the second Type interface and controlling the second PWM controller to output the voltage corresponding to the second demand voltage.
As an embodiment of the present invention: a parallel control unit is arranged between the first Type circuit and the second Type circuit;
the parallel control unit comprises a first triode, a second triode, a third switching tube and a fourth switching tube;
the emitting electrodes of the first triode and the second triode are electrically connected;
the collector electrode of the first triode is electrically connected with the grid electrode of the third switching tube;
the third switching tube is electrically connected with the source electrode of the fourth switching tube;
and the grid electrode of the fourth switching tube is electrically connected with the collector electrode of the second triode.
As an embodiment of the present invention: the first switch of the first Type circuit is electrically connected with the base electrode of the first triode, the second switch of the second Type circuit is electrically connected with the base electrode of the second triode, the first switch is electrically connected with the second switch to form a double-transformer parallel circuit
The first transformer of the first Type circuit and the second transformer of the second Type circuit are connected with the same external power supply.
As an embodiment of the present invention: the grid electrode of the third switching tube is also connected with a first resistor and a second resistor; wherein the content of the first and second substances,
the other end of the first resistor is electrically connected with the drain electrode of the third switching tube;
the other end of the second resistor is electrically connected with the collector of the first triode;
and the first resistor and the second resistor perform voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the third switching tube is opened.
As an embodiment of the present invention: the grid electrode of the fourth switching tube is also connected with a third resistor and a fourth resistor; wherein the content of the first and second substances,
the other end of the third resistor is electrically connected with the drain electrode of the fourth switching tube;
the other end of the fourth resistor is electrically connected with the collector of the second triode;
and the third resistor and the fourth resistor execute voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the fourth switching tube is turned on.
As an embodiment of the present invention: when belonging to a dual circuit insertion device:
the first switch of the first Type circuit does not provide a signal to the first PWM controller, and mos of the third switching tube is closed;
and the second switch of the second Type circuit does not provide signals for the second PWM controller, and mos of the fourth switch tube is closed.
As an embodiment of the present invention: first Type circuit and second Type circuit still are connected with voltage detector, voltage detector is used for judging whether voltage surpasss preset voltage to report to the police when surpassing preset voltage:
the voltage detection steps of the voltage detector are as follows:
step 1: determining, from the voltage detector, a current change characteristic during charging by:
wherein, the I1tRepresenting a current characteristic of the first Type circuit at time t; the I2tRepresenting a current characteristic of the second Type circuit at time t; w represents an error coefficient of current detection;
step 2: determining a current steady state characteristic during charging from the voltage detector by:
and step 3: according to the pressure sensing device, determining the current variation trend characteristics in the charging process through the following formula:
and 4, step 4: judging whether the constant voltage exceeds a preset voltage or not according to the current change characteristic, the current steady-state characteristic and the current change trend characteristic:
wherein the IF represents a preset voltage threshold;
when G < 1, the preset voltage is not exceeded; and when G is more than or equal to 1, the voltage exceeds a preset voltage.
The invention has the beneficial effects that: the invention relates to a 100W high-power double-port Type-C quick charging method, which adopts a double-way transformer parallel balance control technology; by a microcontroller; when the single-port charging power reaches a certain range, the two transformers are connected in parallel to equally divide the load, so that the multi-port small-volume charger which is higher in conversion efficiency, lower in product heat productivity and more comprehensive in product application is realized. The invention is a highly integrated GaN control scheme, has few peripheral elements and simple circuit, and has a volume reduced by 30 percent compared with a charger with the same grade power; the invention has high conversion efficiency and low product calorific value, does not need to improve the product temperature too much, is compatible with various chargeable devices and has higher user experience.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a circuit diagram of a parallel control circuit of a two-way transformer according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a multi-port charger according to the prior art in an embodiment of the invention.
The first transformer is T1, the second transformer is T2, the first PWM controller is U1, the second PWM controller is U2, the first switch tube is Q1, the second switch tube is Q2, the third switch tube is Q3, the fourth switch tube is Q4, the first switch tube is MOS1, the second switch tube is MOS2, the first triode is C1, the second triode is C2, the first resistor is R1, the second resistor is R2, the third resistor is R3, and the fourth resistor is R4.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
A two-way transformer parallel control circuit comprises a first Type circuit, a second Type circuit and a parallel control unit;
the first Type circuit and the second Type circuit are electrically connected with the parallel control unit to form a parallel control circuit; wherein
The first Type circuit and the second Type circuit are used for detecting the inserted PD equipment and judging whether the inserted PD equipment belongs to single-circuit insertion equipment or double-circuit insertion equipment;
when the single circuit plug-in equipment belongs to the single circuit plug-in equipment, detecting whether the power of the single circuit plug-in equipment reaches a preset voltage range, and controlling the first Type circuit and the second Type circuit to be connected in parallel when the power of the single circuit plug-in equipment reaches the preset voltage range, and controlling the balanced output current through the first Type circuit and the second Type circuit;
when the dual-circuit plug-in device belongs to the dual-circuit plug-in device, the first Type circuit and the second Type circuit respectively output current independently.
The principle and the beneficial effects of the invention are as follows: the invention relates to a 100W high-power double-port Type-C quick charging method, which adopts a double-way transformer parallel balance control technology; by a microcontroller; when the single-port charging power reaches a certain range, the two transformers are connected in parallel to equally divide the load, so that the multi-port small-volume charger which is higher in conversion efficiency, lower in product heat productivity and more comprehensive in product application is realized. The invention is a highly integrated GaN control scheme, has few peripheral elements and simple circuit, and has a volume reduced by 30 percent compared with a charger with the same grade power; the invention has high conversion efficiency and low product calorific value, does not need to improve the product temperature too much, is compatible with various chargeable devices and has higher user experience.
The invention is characterized in that: device for performing single-port insertion
When a Type-C1 interface is inserted into a charging PD device (an inserting device), the MOS1 obtains required voltage and current information, and the MOS1 transmits the obtained voltage and current information to the U1; MOS1 controls U1 to output corresponding voltage current, and MOS2 controls U2 to output corresponding voltage current.
When Vout _ a outputs 20V, voltage is divided by R1, R2, so that Q3Mos is turned on; MOS2 provides a voltage signal to transistor C2 to turn on Q4 MOS; after Q3 and Q4Mos are both opened, two outputs are connected in parallel;
the MOS1 and the MOS2 are communicated in real time, and the fine voltage is mutually controlled and fine adjusted to balance two paths of current.
Performing dual port insertion device
When the Type-C1 and Type-C2 interfaces are plugged into the charging PD device, the MOS1 and the MOS2 communicate to know that the two interfaces are plugged into the device, no signal is provided, and the Q3 and the Q4Mos are in a closed state.
MOS1 controls U1 to output corresponding voltage and current, MOS2 controls U2 to output corresponding voltage and current, and the two ports do not interfere with each other.
As an embodiment of the present invention: the first Type circuit includes: the power supply comprises a first transformer, a first PWM controller, a first switch tube and a first Type interface;
the first transformer is electrically connected with the first PWM controller, and the first PWM controller is used for outputting voltage;
the first transformer is further electrically connected with the first switch tube, the first switch tube is electrically connected with the first Type interface, and the first Type interface is used for controlling voltage to be output to the first Type interface;
the first PWM controller is electrically connected with the first switch, the first switch is electrically connected with the first Type interface, and the first switch is used for detecting a first demand voltage of an insertion device with a first Type interface inserted and controlling the first PWM controller to output a voltage corresponding to the first demand voltage.
The principle and the beneficial effects of the invention are as follows: the first Type circuit realizes the function of charging through the first Type interface.
As an embodiment of the present invention: the second Type circuit includes: the second transformer, the second PWM controller, the second switch tube and the second Type interface;
the second transformer is electrically connected with the second PWM controller, and the second PWM controller is used for outputting voltage;
the second transformer is further electrically connected with the second switching tube, the second switching tube is electrically connected with the second Type interface, and the second Type interface is used for controlling voltage to be output to the second Type interface;
the second PWM controller is electrically connected with the second switch, the second switch is electrically connected with the second Type interface, and the second switch is used for detecting the second demand voltage of the insertion equipment inserted into the second Type interface and controlling the second PWM controller to output the voltage corresponding to the second demand voltage.
The principle and the beneficial effects of the invention are as follows: the second Type circuit has realized the function that charges through the second Type interface.
As an embodiment of the present invention: a parallel control unit is arranged between the first Type circuit and the second Type circuit;
the parallel control unit comprises a first triode, a second triode, a third switching tube and a fourth switching tube;
the emitting electrodes of the first triode and the second triode are electrically connected;
the collector electrode of the first triode is electrically connected with the grid electrode of the third switching tube;
the third switching tube is electrically connected with the source electrode of the fourth switching tube;
and the grid electrode of the fourth switching tube is electrically connected with the collector electrode of the second triode.
The principle and the beneficial effects of the invention are as follows: the parallel control unit realizes that the first Type circuit and the second Type circuit are connected in parallel to form a parallel control circuit of the double-path transformer.
As an embodiment of the present invention: the first switch of the first Type circuit is electrically connected with the base electrode of the first triode, the second switch of the second Type circuit is electrically connected with the base electrode of the second triode, the first switch is electrically connected with the second switch to form a double-transformer parallel circuit
The first transformer of the first Type circuit and the second transformer of the second Type circuit are connected with the same external power supply.
The principle and the beneficial effects of the invention are as follows: the first Type circuit and the second Type circuit are electrically connected with the parallel control unit respectively, the technical scheme of parallel control is realized, and the problem of load sharing of two parallel transformers is solved.
As an embodiment of the present invention: the grid electrode of the third switching tube is also connected with a first resistor and a second resistor; wherein the content of the first and second substances,
the other end of the first resistor is electrically connected with the drain electrode of the third switching tube;
the other end of the second resistor is electrically connected with the collector of the first triode;
and the first resistor and the second resistor perform voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the third switching tube is opened.
The principle and the beneficial effects of the invention are as follows: the mos of the third switching tube is controlled based on voltage division control, and controllable parallel connection of the first Type circuit and the second Type circuit is further achieved.
As an embodiment of the present invention: the grid electrode of the fourth switching tube is also connected with a third resistor and a fourth resistor; wherein the content of the first and second substances,
the other end of the third resistor is electrically connected with the drain electrode of the fourth switching tube;
the other end of the fourth resistor is electrically connected with the collector of the second triode;
and the third resistor and the fourth resistor execute voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the fourth switching tube is turned on.
The principle and the beneficial effects of the invention are as follows: according to the invention, mos control of the fourth switching tube is realized based on voltage division control, and controllable parallel connection of the first Type circuit and the second Type circuit is further realized.
As an embodiment of the present invention: when belonging to a dual circuit insertion device:
the first switch of the first Type circuit does not provide a signal to the first PWM controller, and mos of the third switching tube is closed;
and the second switch of the second Type circuit does not provide signals for the second PWM controller, and mos of the fourth switch tube is closed.
The principle and the beneficial effects of the invention are as follows: according to the invention, based on non-parallel independent control, the double-device simultaneous charging of the first Type circuit and the second Type circuit is realized, and the two Type interfaces are not interfered with each other.
As an embodiment of the present invention: first Type circuit and second Type circuit still are connected with voltage detector, voltage detector is used for judging whether voltage surpasss preset voltage to report to the police when surpassing preset voltage:
the voltage detection steps of the voltage detector are as follows:
step 1: determining, from the voltage detector, a current change characteristic during charging by:
wherein, the I1tRepresenting a current characteristic of the first Type circuit at time t; the I2tRepresenting a current characteristic of the second Type circuit at time t; w represents an error coefficient of current detection;
step 2: determining a current steady state characteristic during charging from the voltage detector by:
and step 3: according to the pressure sensing device, determining the current variation trend characteristics in the charging process through the following formula:
and 4, step 4: judging whether the constant voltage exceeds a preset voltage or not according to the current change characteristic, the current steady-state characteristic and the current change trend characteristic:
wherein the IF represents a preset voltage threshold;
when G < 1, the preset voltage is not exceeded; and when G is more than or equal to 1, the voltage exceeds a preset voltage.
The working principle of the technical scheme is as follows: the method is characterized in that whether the voltage has a fault or not is judged based on a voltage detector connected with a first Type circuit and a second Type circuit, and in the detection process, the method is based on a voltage detection technology of PID respectively, the change characteristic, the current steady-state characteristic and the current change trend characteristic of the current are judged, whether the current voltage exceeds the preset voltage or not is judged, and further, whether the voltage exceeds the actual voltage or not is judged.
The beneficial effects of the above technical scheme are: the invention can also judge the voltage in the charging time period, judge whether the voltage exceeds the preset voltage, and further protect the charging equipment and the charger during charging.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A two-way transformer parallel control circuit is characterized in that the two-way transformer comprises a first Type circuit, a second Type circuit and a parallel control unit;
the first Type circuit and the second Type circuit are electrically connected with the parallel control unit to form a parallel control circuit; wherein
The first Type circuit and the second Type circuit are used for detecting the inserted PD equipment and judging whether the inserted PD equipment belongs to single-circuit insertion equipment or double-circuit insertion equipment;
when the single circuit plug-in equipment belongs to the single circuit plug-in equipment, detecting whether the power of the single circuit plug-in equipment reaches a preset voltage range, and controlling the first Type circuit and the second Type circuit to be connected in parallel when the power of the single circuit plug-in equipment reaches the preset voltage range, and controlling the balanced output current through the first Type circuit and the second Type circuit;
when the dual-circuit plug-in device belongs to the dual-circuit plug-in device, the first Type circuit and the second Type circuit respectively output current independently.
2. The two-way transformer parallel control circuit of claim 1, wherein the first Type circuit comprises: the power supply comprises a first transformer, a first PWM controller, a first switch tube and a first Type interface;
the first transformer is electrically connected with the first PWM controller, and the first PWM controller is used for outputting voltage;
the first transformer is further electrically connected with the first switch tube, the first switch tube is electrically connected with the first Type interface, and the first Type interface is used for controlling voltage to be output to the first Type interface;
the first PWM controller is electrically connected with the first switch, the first switch is electrically connected with the first Type interface, and the first switch is used for detecting a first demand voltage of an insertion device with a first Type interface inserted and controlling the first PWM controller to output a voltage corresponding to the first demand voltage.
3. The two-way transformer parallel control circuit of claim 2, wherein the second Type circuit comprises: the second transformer, the second PWM controller, the second switch tube and the second Type interface;
the second transformer is electrically connected with the second PWM controller, and the second PWM controller is used for outputting voltage;
the second transformer is further electrically connected with the second switching tube, the second switching tube is electrically connected with the second Type interface, and the second Type interface is used for controlling voltage to be output to the second Type interface;
the second PWM controller is electrically connected with the second switch, the second switch is electrically connected with the second Type interface, and the second switch is used for detecting the second demand voltage of the insertion equipment inserted into the second Type interface and controlling the second PWM controller to output the voltage corresponding to the second demand voltage.
4. The two-way transformer parallel control circuit according to claim 3, wherein a parallel control unit is arranged between the first Type circuit and the second Type circuit;
the parallel control unit comprises a first triode, a second triode, a third switching tube and a fourth switching tube;
the emitting electrodes of the first triode and the second triode are electrically connected;
the collector electrode of the first triode is electrically connected with the grid electrode of the third switching tube;
the third switching tube is electrically connected with the source electrode of the fourth switching tube;
and the grid electrode of the fourth switching tube is electrically connected with the collector electrode of the second triode.
5. The two-way transformer parallel control circuit according to claim 4, wherein a first switch of the first Type circuit is electrically connected to the base of the first triode, a second switch of the second Type circuit is electrically connected to the base of the second triode, and the first switch is electrically connected to the second switch to form a two-transformer parallel circuit
The first transformer of the first Type circuit and the second transformer of the second Type circuit are connected with the same external power supply.
6. The parallel control circuit of two-way transformer according to claim 4, wherein the grid of the third switching tube is further connected with a first resistor and a second resistor; wherein the content of the first and second substances,
the other end of the first resistor is electrically connected with the drain electrode of the third switching tube;
the other end of the second resistor is electrically connected with the collector of the first triode;
and the first resistor and the second resistor perform voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the third switching tube is opened.
7. The parallel control circuit of the two-way transformer according to claim 4, wherein the grid of the fourth switching tube is further connected with a third resistor and a fourth resistor; wherein the content of the first and second substances,
the other end of the third resistor is electrically connected with the drain electrode of the fourth switching tube;
the other end of the fourth resistor is electrically connected with the collector of the second triode;
and the third resistor and the fourth resistor execute voltage division when the power of the single-circuit plug-in equipment reaches a preset voltage range, and mos of the fourth switching tube is turned on.
8. The two-way transformer parallel control circuit according to claim 4, wherein when belonging to a two-way insertion device:
the first switch of the first Type circuit does not provide a signal to the first PWM controller, and mos of the third switching tube is closed;
and the second switch of the second Type circuit does not provide signals for the second PWM controller, and mos of the fourth switch tube is closed.
9. The two-way transformer parallel control circuit according to claim 1, wherein the first Type circuit and the second Type circuit are further connected with a voltage detector, and the voltage detector is used for judging whether the voltage exceeds a preset voltage and giving an alarm when the voltage exceeds the preset voltage:
the voltage detection steps of the voltage detector are as follows:
step 1: determining, from the voltage detector, a current change characteristic during charging by:
wherein, the I1tRepresenting a current characteristic of the first Type circuit at time t; the I2tRepresenting a current characteristic of the second Type circuit at time t; w represents an error coefficient of current detection;
step 2: determining a current steady state characteristic during charging from the voltage detector by:
and step 3: according to the pressure sensing device, determining the current variation trend characteristics in the charging process through the following formula:
and 4, step 4: judging whether the constant voltage exceeds a preset voltage or not according to the current change characteristic, the current steady-state characteristic and the current change trend characteristic:
wherein the IF represents a preset voltage threshold;
when G < 1, the preset voltage is not exceeded; and when G is more than or equal to 1, the voltage exceeds a preset voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117728.2A CN112928807B (en) | 2021-01-28 | 2021-01-28 | Double-circuit transformer parallel control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110117728.2A CN112928807B (en) | 2021-01-28 | 2021-01-28 | Double-circuit transformer parallel control circuit |
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| Publication Number | Publication Date |
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| CN112928807A true CN112928807A (en) | 2021-06-08 |
| CN112928807B CN112928807B (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110117728.2A Active CN112928807B (en) | 2021-01-28 | 2021-01-28 | Double-circuit transformer parallel control circuit |
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| CN110380489A (en) * | 2019-08-08 | 2019-10-25 | 珠海英集芯半导体有限公司 | A kind of fast charge circuit that can automatically adjust power and method |
| EP3675339A1 (en) * | 2018-12-27 | 2020-07-01 | Yazaki Corporation | 3-phase dual active bridge dc/dc converter with auxilary secondary output |
| CN112000164A (en) * | 2019-05-27 | 2020-11-27 | 宏碁股份有限公司 | Power supply |
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| JP2002051550A (en) * | 2000-08-01 | 2002-02-15 | Matsushita Electric Ind Co Ltd | Switching power supply and semiconductor device therefor |
| US20070076446A1 (en) * | 2005-10-05 | 2007-04-05 | Sanken Electric Co., Ltd. | Power converter |
| CN107706972A (en) * | 2017-09-30 | 2018-02-16 | 湖南海翼电子商务股份有限公司 | Power output control method, circuit and charging device for charging device |
| EP3675339A1 (en) * | 2018-12-27 | 2020-07-01 | Yazaki Corporation | 3-phase dual active bridge dc/dc converter with auxilary secondary output |
| CN112000164A (en) * | 2019-05-27 | 2020-11-27 | 宏碁股份有限公司 | Power supply |
| CN110289658A (en) * | 2019-07-16 | 2019-09-27 | 青米（北京）科技有限公司 | A kind of more mouthfuls of out-put supply managing devices of USB |
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| CN112928807B (en) | 2022-09-23 |
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