CN212811577U - AC/DC converter - Google Patents
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- CN212811577U CN212811577U CN202021584505.4U CN202021584505U CN212811577U CN 212811577 U CN212811577 U CN 212811577U CN 202021584505 U CN202021584505 U CN 202021584505U CN 212811577 U CN212811577 U CN 212811577U
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Abstract
The embodiment of the utility model provides an AC-DC conversion device, which comprises a rectification inverter circuit, a voltage conversion circuit, a first controller and a second controller; the input end of the rectification inverter circuit is connected with an alternating current signal, the output end of the rectification inverter circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with a load; the first controller is connected with the second controller, is connected with the control end of the rectification inverter circuit, and is used for controlling the rectification inverter circuit to convert the first alternating current into the first direct current and convert the second direct current into the second alternating current; the second controller is connected with the control end of the voltage conversion circuit and is used for controlling the voltage conversion circuit to increase the voltage of the first direct current and decrease the voltage of the second direct current. The power utilization rate and efficiency can be improved through the alternating current-direct current conversion device.
Description
Technical Field
The utility model relates to a current transformation technical field especially relates to an alternating current-direct current conversion equipment.
Background
The alternating current-direct current conversion is widely applied to links such as inverters of energy storage systems, hybrid power supply grid-off and grid-connected inverters, lithium battery factory formation capacity grading, aging detection and the like. However, the current ac/dc conversion device has the problems of low power utilization rate, low efficiency and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides an alternating current-direct current conversion device aims at improving alternating current-direct current conversion device's power utilization and efficiency.
The embodiment of the utility model provides an AC-DC conversion device, which comprises a rectification inverter circuit, a voltage conversion circuit, a first controller and a second controller;
the input end of the rectification inverter circuit is connected with an alternating current signal, the output end of the rectification inverter circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with a load;
the first controller is connected with the second controller, is connected with the control end of the rectification inverter circuit, and is used for controlling the rectification inverter circuit to convert the first alternating current into the first direct current and convert the second direct current into the second alternating current;
the second controller is connected with the control end of the voltage conversion circuit and is used for controlling the voltage conversion circuit to increase the voltage of the first direct current and decrease the voltage of the second direct current.
In some embodiments, the voltage conversion circuit includes a DC/DC unit and a resonant isolated voltage conversion unit.
In some embodiments, the switching tube in the rectification inverter circuit is an IGBT.
In some embodiments, the rectification inverter circuit includes: the electrolytic capacitor comprises a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and an electrolytic capacitor;
the emitter of the first switch tube and the collector of the third switch tube are connected in common and used as the first input end of the rectification inverter circuit to be connected with an alternating current signal, the emitter of the second switch tube and the collector of the fourth switch tube are connected in common and used as the second input end of the rectification inverter circuit to be connected with an alternating current signal, the collector of the first switch tube, the collector of the second switch tube and the first end of the electrolytic capacitor are connected in common, and the emitter of the third switch tube, the emitter of the fourth switch tube and the second end of the electrolytic capacitor are connected in common.
In some embodiments, the DC/DC unit includes: a third capacitor, a fifth switch tube, a sixth switch tube, a fourth inductor and a fourth capacitor;
the first end of the third capacitor is connected with the drain electrode of the fifth switch tube, the second end of the third capacitor, the source electrode of the sixth switch tube and the second end of the fourth capacitor are connected in common, the source electrode of the fifth switch tube, the first end of the fourth inductor and the drain electrode of the sixth switch tube are connected in common, and the second end of the fourth inductor is connected with the first end of the fourth capacitor.
In some embodiments, the resonant isolated voltage translation circuit unit: a fifth capacitor, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, an eleventh switch tube, a twelfth switch tube, a sixth capacitor, a seventh capacitor, an eighth capacitor, a fifth inductor, a sixth inductor, a seventh inductor, a primary side of a first transformer, a secondary side first winding of the first transformer, a secondary side second winding of the first transformer, a primary side of a second transformer, a secondary side first winding of the second transformer, a secondary side second winding of the second transformer, a primary side of a third transformer, a secondary side first winding of the third transformer, a secondary side second winding of the third transformer, a thirteenth switch tube, a fourteenth switch tube, a fifteenth switch tube, a sixteenth switch tube, a seventeenth switch tube, an eighteenth switch tube and a ninth capacitor; the first end of the fifth capacitor, the drain electrode of the seventh switch tube, the drain electrode of the eighth switch tube and the drain electrode of the ninth switch tube are connected in common, the second end of the fifth capacitor, the source electrode of the tenth switching tube, the source electrode of the eleventh switching tube and the source electrode of the twelfth switching tube are connected in common, the source electrode of the seventh switch tube, the drain electrode of the tenth switch tube and the first end of the eighth capacitor are connected in common, a second end of the eighth capacitor is connected with a first end of the seventh inductor, a source of the eighth switch tube, a drain of the eleventh switch tube and a first end of the seventh capacitor are connected in common, a second end of the seventh capacitor is connected with a first end of the sixth inductor, a source electrode of the ninth switching tube, a drain electrode of the twelfth switching tube and a first end of the sixth capacitor are connected in common, and a second end of the sixth capacitor is connected with a first end of the fifth inductor; the first end of the primary side of the first transformer is connected with the second end of the fifth inductor, the first end of the primary side of the second transformer is connected with the second end of the sixth inductor, the first end of the primary side of the third transformer is connected with the second end of the seventh inductor, and the second end of the primary side of the first transformer, the second end of the primary side of the second transformer and the second end of the primary side of the third transformer are connected together;
the first end of the first secondary winding of the first transformer is connected with the drain electrode of the thirteenth switching tube, the first end of the first secondary winding of the second transformer is connected with the drain electrode of the fourteenth switching tube, the first end of the first secondary winding of the third transformer is connected with the drain electrode of the fifteenth switching tube, and the source electrode of the thirteenth switching tube, the source electrode of the fourteenth switching tube and the source electrode of the fifteenth switching tube are connected in common;
the second end of the first transformer secondary side first winding, the second end of the second transformer secondary side first winding, the second end of the third transformer secondary side first winding, the first end of the ninth capacitor and the first end of the first transformer secondary side second winding are connected in common;
the second end of the secondary side second winding of the first transformer is connected with the drain electrode of the sixteenth capacitor, the second end of the secondary side second winding of the second transformer is connected with the drain electrode of the seventeenth capacitor, the second end of the secondary side second winding of the third transformer is connected with the drain electrode of the eighteenth capacitor, and the source electrode of the sixteenth capacitor, the source electrode of the seventeenth capacitor, the source electrode of the eighteenth capacitor and the second end of the ninth capacitor are connected in common.
In some embodiments, hardware fault signal communication is provided between the first controller and the second controller.
In some embodiments, the first controller and the second controller each comprise a digital signal processor, DSP.
The embodiment of the utility model provides an AC-DC conversion device, which comprises a rectification inverter circuit, a voltage conversion circuit, a first controller and a second controller; the input end of the rectification inverter circuit is connected with an alternating current signal, the output end of the rectification inverter circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with a load; the first controller is connected with the second controller, is connected with the control end of the rectification inverter circuit, and is used for controlling the rectification inverter circuit to convert the first alternating current into the first direct current and convert the second direct current into the second alternating current; the second controller is connected with the control end of the voltage conversion circuit and is used for controlling the voltage conversion circuit to increase the voltage of the first direct current and decrease the voltage of the second direct current. The power utilization rate and efficiency can be improved through the alternating current-direct current conversion device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments 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 embodiments of the invention, but do not constitute a limitation of the embodiments of the invention. In the drawings:
fig. 1 is a schematic structural diagram of an ac-dc converter according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ac-dc converter according to another embodiment of the present invention;
fig. 3 is a schematic diagram of a rectification inverter circuit of an ac-dc converter according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a DC/DC unit of an ac-DC converter according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a resonance isolation voltage conversion unit of an ac-dc converter according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of an ac-dc converter provided in an embodiment of the present invention, as shown in fig. 1, the ac-dc converter includes: the voltage conversion circuit comprises a rectification inverter circuit, a voltage conversion circuit, a first controller and a second controller; the input end of the rectification inverter circuit is connected with an alternating current signal, the output end of the rectification inverter circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with a load; the first controller is connected with the second controller, is connected with the control end of the rectification inverter circuit, and is used for controlling the rectification inverter circuit to convert the first alternating current into the first direct current and convert the second direct current into the second alternating current; the second controller is connected with the control end of the voltage conversion circuit and is used for controlling the voltage conversion circuit to increase the voltage of the first direct current and decrease the voltage of the second direct current.
Specifically, the rectification inverter circuit is a bidirectional conversion circuit that can convert alternating current into direct current and also convert direct current into alternating current. The first controller controls the rectification inverter circuit to execute a rectification mode in a charging stage and execute an inversion mode in a discharging stage. The voltage conversion circuit is a circuit that can perform voltage boosting or voltage reduction. The second controller controls the voltage conversion circuit to perform a step-down mode in a charge phase and a step-up mode in a discharge phase.
The embodiment of the utility model provides a AC-DC conversion device can realize rectification and contravariant and be incorporated into the power networks bidirectional operation, has improved AC-DC conversion device's power utilization and efficiency.
Fig. 2 is a schematic structural diagram of an ac-DC converter according to another embodiment of the present invention, as shown in fig. 2, in some embodiments, the voltage conversion circuit includes a DC/DC unit and a resonance isolation voltage conversion unit.
Fig. 3 is a schematic diagram of a rectification inverter circuit of an ac/dc converter according to an embodiment of the present invention, as shown in fig. 3, in some embodiments, the rectification inverter circuit includes: a first switching tube Q1, a second switching tube Q2, a third switching tube Q3, a fourth switching tube Q4 and an electrolytic capacitor EC 1; the emitter of the first switch tube Q1 and the collector of the third switch tube Q3 are connected in common, the emitter of the second switch tube Q2 and the collector of the fourth switch tube Q4 are connected in common, the collector of the first switch tube Q1, the collector of the second switch tube Q2 and the first end of the electrolytic capacitor EC1 are connected in common, and the emitter of the third switch tube Q3, the emitter of the fourth switch tube Q4 and the second end of the electrolytic capacitor EC1 are connected in common. In some embodiments, the ac-dc converter further includes a filter circuit disposed between the ac power grid and the rectification inverter circuit for filtering ripples in the circuit.
Fig. 4 is a schematic diagram of a DC/DC unit of an ac/DC conversion device according to an embodiment of the present invention, as shown in fig. 4, in some embodiments, the DC/DC unit includes: a third capacitor C3, a fifth switch tube Q5, a sixth switch tube Q6, a fourth inductor L4, and a fourth capacitor C4; a first end of the third capacitor C3 is connected to a drain of the fifth switch tube Q5, a second end of the third capacitor C3, a source of the sixth switch tube Q6 and a second end of the fourth capacitor C4 are connected in common, a source of the fifth switch tube Q5, a first end of the fourth inductor L4 and a drain of the sixth switch tube Q6 are connected in common, and a second end of the fourth inductor L4 is connected to a first end of the fourth capacitor C4.
Fig. 5 is a schematic diagram of a resonance isolation voltage conversion unit of an ac-dc converter according to an embodiment of the present invention, as shown in fig. 5, in some embodiments, the resonance isolation voltage conversion circuit unit includes: a fifth capacitor C5, a seventh switch Q7, an eighth switch Q8, a ninth switch Q9, a tenth switch Q10, an eleventh switch Q11, a twelfth switch Q12, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a fifth inductor L5, a sixth inductor L6, a seventh inductor L7, a primary side of the first transformer T7, a secondary side first winding of the first transformer T7, a secondary side second winding of the first transformer T7, a primary side of the second transformer T7, a secondary side first winding of the second transformer T7, a secondary side second winding of the second transformer T7, a primary side of the third transformer T7, a secondary side first winding of the third transformer T7, a secondary side second winding of the third transformer T7, a thirteenth switch Q7, a fourteenth switch Q7, a fifteenth switch Q7, a sixteenth switch Q7, a seventeenth switch Q7, a ninth switch Q7, a seventeenth switch Q7 and a seventeenth switch Q7;
a first end of the fifth capacitor C5, a drain of the seventh switch Q7, a drain of the eighth switch Q8 and a drain of the ninth switch Q9 are commonly connected, a second end of the fifth capacitor C5, a source of the tenth switch Q10, a source of the eleventh switch Q11 and a source of the twelfth switch Q12 are commonly connected, a source of the seventh switch Q7, a drain of the tenth switch Q10 and a first end of the eighth capacitor C8 are commonly connected, a second end of the eighth capacitor C8 is connected to a first end of the seventh inductor L7, a source of the eighth switch Q8, a drain of the eleventh switch Q11 and a first end of the seventh capacitor C7 are commonly connected, a second end of the seventh capacitor C7 is connected to a first end of the sixth inductor L6, a drain of the ninth switch Q9, a drain of the ninth switch Q12 and a drain of the ninth switch Q6 are commonly connected, a second end of the sixth capacitor C6 is connected with a first end of the fifth inductor L5;
a first end of a primary side of the first transformer T1 is connected to a second end of the fifth inductor L5, a first end of a primary side of the second transformer T2 is connected to a second end of the sixth inductor L6, a first end of a primary side of the third transformer T3 is connected to a second end of the seventh inductor L7, and a second end of a primary side of the first transformer T1, a second end of a primary side of the second transformer T2 and a second end of a primary side of the third transformer T3 are connected in common; a first end of a secondary side first winding of the first transformer T1 is connected to a drain of the thirteenth switching tube Q13, a first end of a secondary side first winding of the second transformer T2 is connected to a drain of the fourteenth switching tube Q14, a first end of a secondary side first winding of the third transformer T3 is connected to a drain of the fifteenth switching tube Q15, and a source of the thirteenth switching tube Q13, a source of the fourteenth switching tube Q14, and a source of the fifteenth switching tube Q15 are connected in common; a second end of the secondary side first winding of the first transformer T1, a second end of the secondary side first winding of the second transformer T2, a second end of the secondary side first winding of the third transformer T3, a first end of the ninth capacitor C9, a first end of the secondary side second winding of the first transformer T1, and a first end of the secondary side second winding of the second transformer T2 and a first end of the secondary side second winding of the third transformer T3 are connected in common; the second end of the secondary side second winding of the first transformer T1 is connected to the drain of the sixteenth switching tube Q16, the second end of the secondary side second winding of the second transformer T2 is connected to the drain of the seventeenth switching tube Q17, the second end of the secondary side second winding of the third transformer T3 is connected to the drain of the eighteenth switching tube Q18, and the source of the sixteenth switching tube Q16, the source of the seventeenth switching tube Q17, the source of the eighteenth switching tube Q18 and the second end of the ninth capacitor C9 are connected in common. The embodiment of the utility model provides a LLC topology can realize that ZVS is soft to be opened, is favorable to reducing the loss. The three-phase LLC realizes low output ripple through 120 degrees of phase interleaving, and the utilization rate of devices is high. In some embodiments, hardware fault signal communication is provided between the first controller and the second controller.
Specifically, the first controller and the second controller are connected, specifically, information communication connection may be achieved through a CAN bus, a hardware fault signal is set between the first controller and the second controller, and when at least one circuit in the single-phase ac/dc converter fails, the first controller or the second controller sends a fault instruction to the other side to protect devices of each circuit from being damaged.
In some embodiments, the first controller and the second controller each comprise a digital signal processor, DSP.
The embodiment of the utility model provides a pair of AC/DC conversion device can realize rectification and contravariant and be incorporated into the power networks bidirectional operation, improves AC/DC conversion device's power utilization and efficiency.
The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.
In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.
Claims (8)
1. An alternating current-direct current conversion device is characterized by comprising a rectification inverter circuit, a voltage conversion circuit, a first controller and a second controller;
the input end of the rectification inverter circuit is connected with an alternating current signal, the output end of the rectification inverter circuit is connected with the input end of the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with a load;
the first controller is connected with the second controller, is connected with the control end of the rectification inverter circuit, and is used for controlling the rectification inverter circuit to convert the first alternating current into the first direct current and convert the second direct current into the second alternating current;
the second controller is connected with the control end of the voltage conversion circuit and is used for controlling the voltage conversion circuit to increase the voltage of the first direct current and decrease the voltage of the second direct current.
2. The ac-DC converter according to claim 1, wherein said voltage converting circuit comprises a DC/DC unit and a resonant isolated voltage converting unit.
3. The ac-dc converter according to claim 1, wherein the switching tube in the rectifying inverter circuit is an IGBT.
4. The ac-dc converter according to claim 1, wherein said rectifying inverter circuit comprises: the electrolytic capacitor comprises a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and an electrolytic capacitor;
the emitter of the first switch tube and the collector of the third switch tube are connected in common and used as a first input end of the rectification inverter circuit to be connected with an alternating current signal, the emitter of the second switch tube and the collector of the fourth switch tube are connected in common and used as a second input end of the rectification inverter circuit to be connected with an alternating current signal, the collector of the first switch tube, the collector of the second switch tube and a first end of the electrolytic capacitor are connected in common, and the emitter of the third switch tube, the emitter of the fourth switch tube and a second end of the electrolytic capacitor are connected in common.
5. The ac-DC converter according to claim 2, wherein said DC/DC unit comprises: a third capacitor, a fifth switch tube, a sixth switch tube, a fourth inductor and a fourth capacitor;
the first end of the third capacitor is connected with the drain electrode of the fifth switch tube, the second end of the third capacitor, the source electrode of the sixth switch tube and the second end of the fourth capacitor are connected in common, the source electrode of the fifth switch tube, the first end of the fourth inductor and the drain electrode of the sixth switch tube are connected in common, and the second end of the fourth inductor is connected with the first end of the fourth capacitor.
6. The ac-dc conversion device according to claim 3, wherein the resonance isolation voltage conversion circuit unit: a fifth capacitor, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, an eleventh switch tube, a twelfth switch tube, a sixth capacitor, a seventh capacitor, an eighth capacitor, a fifth inductor, a sixth inductor, a seventh inductor, a primary side of a first transformer, a secondary side first winding of the first transformer, a secondary side second winding of the first transformer, a primary side of a second transformer, a secondary side first winding of the second transformer, a secondary side second winding of the second transformer, a primary side of a third transformer, a secondary side first winding of the third transformer, a secondary side second winding of the third transformer, a thirteenth switch tube, a fourteenth switch tube, a fifteenth switch tube, a sixteenth switch tube, a seventeenth switch tube, an eighteenth switch tube and a ninth capacitor;
the first end of the fifth capacitor, the drain electrode of the seventh switch tube, the drain electrode of the eighth switch tube and the drain electrode of the ninth switch tube are connected in common, the second end of the fifth capacitor, the source electrode of the tenth switching tube, the source electrode of the eleventh switching tube and the source electrode of the twelfth switching tube are connected in common, the source electrode of the seventh switch tube, the drain electrode of the tenth switch tube and the first end of the eighth capacitor are connected in common, a second end of the eighth capacitor is connected with a first end of the seventh inductor, a source of the eighth switch tube, a drain of the eleventh switch tube and a first end of the seventh capacitor are connected in common, a second end of the seventh capacitor is connected with a first end of the sixth inductor, a source electrode of the ninth switching tube, a drain electrode of the twelfth switching tube and a first end of the sixth capacitor are connected in common, and a second end of the sixth capacitor is connected with a first end of the fifth inductor;
the first end of the primary side of the first transformer is connected with the second end of the fifth inductor, the first end of the primary side of the second transformer is connected with the second end of the sixth inductor, the first end of the primary side of the third transformer is connected with the second end of the seventh inductor, and the second end of the primary side of the first transformer, the second end of the primary side of the second transformer and the second end of the primary side of the third transformer are connected together;
the first end of the first secondary winding of the first transformer is connected with the drain electrode of the thirteenth switching tube, the first end of the first secondary winding of the second transformer is connected with the drain electrode of the fourteenth switching tube, the first end of the first secondary winding of the third transformer is connected with the drain electrode of the fifteenth switching tube, and the source electrode of the thirteenth switching tube, the source electrode of the fourteenth switching tube and the source electrode of the fifteenth switching tube are connected in common;
the second end of the first transformer secondary side first winding, the second end of the second transformer secondary side first winding, the second end of the third transformer secondary side first winding, the first end of the ninth capacitor and the first end of the first transformer secondary side second winding are connected in common;
the second end of the secondary side second winding of the first transformer is connected with the drain electrode of a sixteenth capacitor, the second end of the secondary side second winding of the second transformer is connected with the drain electrode of a seventeenth capacitor, the second end of the secondary side second winding of the third transformer is connected with the drain electrode of an eighteenth capacitor, and the source electrode of the sixteenth capacitor, the source electrode of the seventeenth capacitor, the source electrode of the eighteenth capacitor and the second end of the ninth capacitor are connected in common.
7. The ac-dc converter according to claim 1, wherein a hardware fault signal communication is provided between said first controller and said second controller.
8. The ac-dc converter according to claim 1, wherein said first controller and said second controller each comprise a Digital Signal Processor (DSP).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021584505.4U CN212811577U (en) | 2020-08-03 | 2020-08-03 | AC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021584505.4U CN212811577U (en) | 2020-08-03 | 2020-08-03 | AC/DC converter |
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| CN212811577U true CN212811577U (en) | 2021-03-26 |
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| CN202021584505.4U Active CN212811577U (en) | 2020-08-03 | 2020-08-03 | AC/DC converter |
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| CN (1) | CN212811577U (en) |
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Effective date of registration: 20211203 Address after: 518000 Room 203, building B, weihuada Industrial Park, No. 5, Lirong Road, Xinshi community, Dalang street, Longhua District, Shenzhen, Guangdong Patentee after: Shenzhen Fuhai Times Electronics Co.,Ltd. Address before: 518000 room 1309, Pioneer Park, Lishan road University Town, Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Fuhai times Technology Co.,Ltd. |
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