CN219875495U - Bidirectional DCDC non-isolated communication circuit, communication power supply, remote equipment application system and combiner application system - Google Patents
Bidirectional DCDC non-isolated communication circuit, communication power supply, remote equipment application system and combiner application system Download PDFInfo
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 77
- 239000003990 capacitor Substances 0.000 claims abstract description 105
- 238000002955 isolation Methods 0.000 claims abstract description 37
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Abstract
The utility model relates to the technical field of direct-current voltage conversion, in particular to a bidirectional DCDC non-isolated communication circuit, a communication power supply, a remote equipment application system and a combiner application system. The bidirectional DCDC non-isolated communication circuit comprises a first input capacitor, a first switch module, a first non-isolated inductor, a second switch module and a first output capacitor, wherein two ends of the first switch module are respectively connected with two ends of the first input capacitor, a first end of the first non-isolated inductor is connected with the first switch module, a second end of the first non-isolated inductor is connected with the second switch module, a first end of the first output capacitor is connected with a first end of the second switch module, a second end of the first output capacitor is connected with a second end of the second switch module, and a second end of the second switch module is also connected with a second end of the first switch module. The utility model solves the problems of high cost, large volume and inconvenient application of the single-phase and multi-phase H-bridge bidirectional DCDC isolation topology caused by the electric isolation component.
Description
Technical Field
The utility model relates to the technical field of direct-current voltage conversion, in particular to a bidirectional DCDC non-isolated communication circuit, a communication power supply, a remote equipment application system and a combiner application system.
Background
With the rapid development of 5G technology, more and more communication devices are deployed in remote geographical locations, and the power grid and communication infrastructure in these locations are often not complete enough. In order to ensure stable operation of the communication device, a highly reliable communication power supply is required. Meanwhile, because the eliminated 2G/3G base station leaves a large number of lead-acid and lithium batteries, the one-way power supply mode cannot efficiently utilize the old batteries, and therefore bidirectional DCDC topology is required to realize bidirectional power conversion power supply so as to realize more efficient energy utilization.
The inventors found that: the existing single-phase and multi-phase H-bridge bidirectional DCDC topology is generally an isolation topology, and has high cost and large volume, so that the practical application process is not flexible enough.
Disclosure of Invention
The utility model provides a bidirectional DCDC non-isolated communication circuit, a communication power supply, a remote equipment application system and a combiner application system, which solve the problems of high cost, large volume and inconvenient application of a single-phase and multi-phase H-bridge bidirectional DCDC isolation topology caused by an electrical isolation component.
According to an aspect of an embodiment of the present utility model, there is provided a bidirectional DCDC non-isolated communication circuit including: the power supply comprises a first input capacitor, a first switch module, a first non-isolation inductor, a second switch module and a first output capacitor, wherein the first end of the first input capacitor is connected with the positive electrode of the power supply, the second end of the first input capacitor is connected with the negative electrode of the power supply, the first end of the first switch module is connected with the first end of the first input capacitor, the second end of the first switch module is connected with the second end of the first input capacitor, the first end of the first non-isolation inductor is connected with the first switch module, the second end of the first non-isolation inductor is connected with the second switch module, the first end of the first output capacitor is connected with the first end of the second switch module, the second end of the first output capacitor is connected with the second end of the second switch module, and the second end of the second switch module is also connected with the second end of the first switch module.
In an alternative manner, the first switch module includes: the input end of the first switching tube is connected with the first end of the first input capacitor, the output end of the first switching tube is connected with the input end of the second switching tube, the output end of the second switching tube is connected with the second end of the first input capacitor, and the public end of the first switching tube and the public end of the second switching tube are connected with the first end of the first non-isolation inductor.
In an alternative manner, the second switch module includes: the output end of the third switch tube is connected with the input end of the fourth switch tube, the first end of the first output capacitor is connected with the input end of the third switch tube, the output end of the fourth switch tube is connected with the output end of the second switch tube, the second end of the first output capacitor is connected with the output end of the fourth switch tube, and the public end of the third switch tube and the public end of the fourth switch tube are connected with the second end of the first non-isolation inductor.
In an optional manner, the bidirectional DCDC non-isolated communication circuit further includes a control and detection module, the control and detection module is connected to the first output capacitor and the control ends of the first switch tube, the second switch tube, the third switch tube and the fourth switch tube, and the control and detection module is configured to detect an output voltage, and control a power trend according to the output voltage and a set voltage, so that the bidirectional DCDC non-isolated communication circuit is in a BUCK, BOOST and critical conduction working mode in any direction.
According to another aspect of the present utility model, there is provided a bidirectional DCDC non-isolated communication circuit including: the power supply comprises a first input capacitor, a first output capacitor, a third switch module, a fourth switch module, a fifth switch module, a sixth switch module, a second non-isolation inductor and a third non-isolation inductor, wherein the first end of the first switch module is connected with the positive electrode of the power supply, the second end of the first switch module is connected with the negative electrode of the power supply, the first end of the third switch module is connected with the first end of the first switch module, the second end of the third switch module is connected with the second end of the second input capacitor, the first end of the second non-isolation inductor is connected with the third switch module, the second end of the second non-isolation inductor is connected with the fifth switch module, the second end of the fifth switch module is connected with the second end of the third switch module and the second end of the fourth switch module, the first end of the fourth switch module is connected with the first end of the third switch module, the first end of the third switch module is connected with the first end of the fourth switch module, the first end of the sixth switch module is connected with the second end of the sixth switch module, and the sixth switch module is connected with the second end of the fourth switch module.
In an optional manner, the third switching module includes a fifth switching tube and a sixth switching tube, an input end of the fifth switching tube is connected to the first end of the second input capacitor, an output end of the fifth switching tube is connected to the input end of the sixth switching tube, an output end of the sixth switching tube is connected to the second end of the second input capacitor, and a first end of the second non-isolated inductor is connected to a common end of the fifth switching tube and the sixth switching tube.
In an optional manner, the fourth switching module includes a seventh switching tube and an eighth switching tube, an input end of the seventh switching tube is connected to an input end of the fifth switching tube, an output end of the seventh switching tube is connected to an input end of the eighth switching tube, an output end of the eighth switching tube is connected to the fifth switching module and the sixth switching module, and a first end of the third non-isolated inductor is connected to a common end of the seventh switching tube and the eighth switching tube.
In an optional manner, the fifth switching module includes a ninth switching tube and a tenth switching tube, an input end of the ninth switching tube is connected with the sixth switching module, an output end of the ninth switching tube is connected with an input end of the tenth switching tube, an output end of the tenth switching tube is connected with an output end of the sixth switching tube and an output end of the eighth switching tube, and a common end of the ninth switching tube and the tenth switching tube is connected with a second end of the second non-isolated inductor.
In an optional manner, the sixth switching module includes an eleventh switching tube and a twelfth switching tube, an input end of the eleventh switching tube is connected to an input end of the ninth switching tube, an output end of the eleventh switching tube is connected to an input end of the twelfth switching tube, an output end of the twelfth switching tube is connected to an output end of the eighth switching tube, a common end of the eleventh switching tube and the twelfth switching tube is connected to a second end of the third non-isolated inductor, a first end of the second output capacitor is connected to an input end of the eleventh switching tube, and a second end of the second output capacitor is connected to an output end of the twelfth switching tube.
In an optional manner, the bidirectional DCDC non-isolated communication circuit further includes a control and detection module, where the control and detection module is connected to the second output capacitor and the control ends of the fifth switching tube, the sixth switching tube, the seventh switching tube, the eighth switching tube, the ninth switching tube, the tenth switching tube, the eleventh switching tube, and the twelfth switching tube, and the control and detection module is configured to detect an output voltage, and control a power trend according to the output voltage and a set voltage, so that the bidirectional DCDC non-isolated communication circuit is in a BUCK, BOOST, and critical conduction working mode in any direction.
According to yet another aspect of the present utility model, there is provided a communication power supply comprising a bi-directional DCDC non-isolated communication circuit as described above.
According to yet another aspect of the present utility model, there is provided a remote device application system comprising a bidirectional DCDC non-isolated communication circuit as any one of the above.
According to yet another aspect of the present utility model, there is provided a combiner application system comprising a bidirectional DCDC non-isolated communication circuit as any one of the above.
The beneficial effects of the utility model are as follows: compared with the prior art, the bidirectional DCDC non-isolated communication circuit provided by the utility model comprises a first input capacitor, a first switch module, a first non-isolated inductor, a second switch module and a first output capacitor, wherein a first end of the first input capacitor is connected with the positive electrode of a power supply, and a second end of the first input capacitor is connected with the negative electrode of the power supply; the first end of first switch module connects the first end of first input electric capacity, and the second end of first switch module connects the second end of first input electric capacity, and first switch module is connected to the first end of first non-isolation inductance, and the second switch module is connected to the second end of first non-isolation inductance, and the first end of first output electric capacity is connected the first end of second switch module, and the second end of second switch module is connected to the second end of first output electric capacity, and the second end of second switch module still is connected the second end of first switch module. The utility model solves the problems of high cost, large volume and inconvenient application of the single-phase and multi-phase H-bridge bidirectional DCDC isolation topology caused by the electric isolation component.
Drawings
FIG. 1 is a block diagram of a bidirectional DCDC non-isolated communication circuit provided by an embodiment of the present utility model;
FIG. 2 is a circuit block diagram of a bi-directional DCDC non-isolated communication circuit provided by an embodiment of the present utility model;
FIG. 3 is a block diagram of a bidirectional DCDC non-isolated communication circuit according to an embodiment of the present utility model;
FIG. 4 is a circuit block diagram of a bi-directional DCDC non-isolated communication circuit provided by an embodiment of the present utility model;
FIG. 5 is a block diagram of a remote device application system according to an embodiment of the present utility model;
fig. 6 is a block diagram of a combiner application system according to an embodiment of the present utility model.
Detailed Description
In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
With the rapid development of 5G technology, more and more base stations need to work in remote areas or in severe environments, the base stations need to support a boosting function to meet the requirement of a remote load, and meanwhile, a large number of obsolete 2G/3G base stations leave a large number of lead-acid and lithium batteries which can be utilized to supply power, but the existing unidirectional power supply mode of a communication power supply is difficult to efficiently utilize the old batteries. Therefore, there is a need to implement bi-directional power conversion power supply using bi-directional DCDC topology to achieve the goal of efficient use of these old batteries, and not only is the price of the communication power supply higher due to the isolation components in the communication power supply, etc., but also the search for more economical and efficient solutions is promoted.
Referring to fig. 1, fig. 1 is a block diagram illustrating a bidirectional DCDC non-isolated communication circuit according to an embodiment of the present utility model. The bidirectional DCDC non-isolated communication circuit 1 includes: the first end of the first input capacitor is connected with the positive electrode of the power supply, the second end of the first input capacitor is connected with the negative electrode of the power supply, the first end of the first switch module 11 is connected with the first end of the first input capacitor, the second end of the first switch module 11 is connected with the second end of the first input capacitor, the first end of the first non-isolation inductor is connected with the first switch module 11, the second end of the first non-isolation inductor is connected with the second switch module 12, the first end of the first output capacitor is connected with the first end of the second switch module 12, the second end of the first output capacitor is connected with the second end of the second switch module 12, and the second end of the second switch module 12 is also connected with the second end of the first switch module 11.
Referring to fig. 2, fig. 2 is a circuit configuration diagram of a bidirectional DCDC non-isolated communication circuit according to an embodiment of the present utility model. The first input capacitor is specifically C1, the first non-isolation inductor is specifically L1, the first output capacitor is specifically C2, the first switch module 11 comprises a first switch tube Q1 and a second switch tube Q3, the input end of the first switch tube Q1 is connected with the first end of the first input capacitor C1, the output end of the first switch tube Q1 is connected with the input end of the second switch tube Q3, the output end of the second switch tube Q3 is connected with the second end of the first input capacitor C1, and the public end of the first switch tube Q1 and the public end of the second switch tube Q3 is connected with the first end of the first non-isolation inductor L1.
The second switch module 12 includes a third switch tube Q2 and a fourth switch tube Q4, where an output end of the third switch tube Q2 is connected to an input end of the fourth switch tube Q4, a first end of the first output capacitor C2 is connected to an input end of the third switch tube Q2, an output end of the fourth switch tube Q4 is connected to an output end of the second switch tube Q3, a second end of the first output capacitor C2 is connected to an output end of the fourth switch tube Q4, a public end of the third switch tube Q2 and the fourth switch tube Q4 is connected to a second end of the first non-isolation inductor L1, and the first output capacitor C2 is also connected to the first output port.
The bidirectional DCDC non-isolated communication circuit 1 further comprises a control and detection module 13, wherein the control and detection module 13 is connected with the control ends of the first output port, the upper computer, the first switching tube Q1, the second switching tube Q3, the third switching tube Q2 and the fourth switching tube Q4. The control and detection module 13 can detect the output voltage and control the power trend according to the output voltage and the set voltage, so that the bidirectional DCDC non-isolated communication circuit 1 is in the BUCK, BOOST and critical conduction working modes in any direction. The control and detection module 13 includes a first DSP chip and a first driving unit, the first DSP chip is connected to the first output port, the upper computer and the first driving unit to detect the output voltage, and compare the detected output voltage with the set voltage to output a control signal to the first driving unit, the first driving unit includes but is not limited to a first driving chip, and the first driving chip is connected to the first DSP chip and the control ends (not labeled in fig. 2) of the first switching tube Q1, the second switching tube Q3, the third switching tube Q2 and the fourth switching tube Q4, and controls the on/off of each switching tube according to the control signal to switch the operation mode of the bidirectional DCDC non-isolated communication circuit 1. It will be appreciated that capacitor C2 may also be the first input capacitor and capacitor C1 the first output capacitor.
The bidirectional DCDC non-isolated communication circuit 1 has three operation modes, namely a BUCK operation mode, a BOOST operation mode and a critical conduction mode, and the following is specifically analyzed:
the bidirectional DCDC non-isolated communication circuit 1 is in a BUCK working mode, if C1 is used as a first input capacitor, C2 is used as a first output capacitor, a first switching tube Q1 is a main switching tube, a second switching tube Q3 is a shunt tube, a fourth switching tube Q4 is a normally open switch, a third switching tube Q2 is a normally closed switch, when Ton, the main switching tube Q1 is closed to charge a first non-isolated inductor L1, meanwhile, the third switching tube Q2 can realize power-on buffering, current impact on the first output capacitor C2 is reduced, when Toff, the main switching tube Q1 is opened, the shunt tube Q3 is closed, and inductive current is charged to the first output capacitor C2 through Q3 in a freewheeling mode; if C2 is used as the first input capacitor, C1 is used as the first output capacitor, the third switching tube Q2 is a main switching tube, the fourth switching tube Q4 is a follow-up tube, the first switching tube Q1 is a normally closed switch, the second switching tube Q3 is a normally open switch, when Ton, the main switching tube Q2 is closed to charge the first non-isolated inductor L1, meanwhile, the first switching tube Q1 can realize power-on buffering, current impact on the first output capacitor C1 is reduced, when Toff, the main switching tube Q2 is opened, the follow-up tube Q4 is closed, and the inductor current is charged to the first output capacitor C1 through Q4 follow-up. In the BOOST working mode, the fourth switching tube Q4 is a main switching tube, the third switching tube Q2 is a follow-up tube, the second switching tube Q3 is a normally open switch, the first switching tube Q1 is a normally closed switch, the main switching tube Q4 is closed to charge the first non-isolated inductor L1 in Ton, meanwhile, the first switching tube Q1 acts as a power-on buffer function to reduce current impact on the first output capacitor C2, the main switching tube Q4 is opened in Toff, the follow-up tube Q2 is closed, and the input voltage and the inductive current charge the first output capacitor C2 through the main switching tube Q2. Only C1 is analyzed as the first input capacitor, and C2 is analyzed as the power trend of the first output capacitor, and because the H-bridge symmetrical structure is adopted, the other power trend is the same, so that the description is omitted. And in the critical conduction mode, the input and output pass-through state is adopted, voltage is not regulated, and the input voltage is equal to the output voltage.
Compared with the prior art, the bidirectional DCDC non-isolated communication circuit provided by the utility model comprises a first input capacitor, a first switch module, a first non-isolated inductor, a second switch module and a first output capacitor, wherein a first end of the first input capacitor is connected with the positive electrode of a power supply, and a second end of the first input capacitor is connected with the negative electrode of the power supply; the first end of first switch module connects the first end of first input electric capacity, and the second end of first switch module connects the second end of first input electric capacity, and first switch module is connected to the first end of first non-isolation inductance, and the second switch module is connected to the second end of first non-isolation inductance, and the first end of first output electric capacity is connected the first end of second switch module, and the second end of second switch module is connected to the second end of first output electric capacity, and the second end of second switch module still is connected the second end of first switch module. According to the utility model, the electric isolation component is replaced by the non-isolation inductor, and the problems of high cost, large volume and inconvenient application of the single-phase H-bridge bidirectional DCDC isolation topology are solved based on the connection relation.
Referring to fig. 3, fig. 3 is a block diagram illustrating a bidirectional DCDC non-isolated communication circuit according to an embodiment of the present utility model. The bidirectional DCDC non-isolated communication circuit 2 comprises a second input capacitance, a second output capacitance, a third switching module 21, a fourth switching module 22, a fifth switching module 23, a sixth switching module 24, a second non-isolated inductance and a third non-isolated inductance. The first end of the second input capacitor is connected with the positive electrode of the power supply, the second end of the second input capacitor is connected with the negative electrode of the power supply, the first end of the third switch module 21 is connected with the first end of the second input capacitor, the second end of the third switch module 21 is connected with the second end of the second non-isolated inductor, the first end of the second non-isolated inductor is connected with the third switch module 21, the second end of the second non-isolated inductor is connected with the fifth switch module 23, the second end of the fifth switch module 23 is connected with the second end of the third switch module 21 and the second end of the fourth switch module 22, the first end of the fourth switch module 22 is connected with the first end of the third switch module 21, the second end of the third non-isolated inductor is connected with the sixth switch module 24, the first end of the sixth switch module 24 is connected with the first end of the fifth switch module 23, the second end of the sixth switch module 24 is connected with the second end of the fourth switch module 22, the first end of the second output capacitor is connected with the second end of the sixth switch module 24.
Referring to fig. 4, fig. 4 is a circuit structure diagram of a bidirectional DCDC non-isolated communication circuit according to an embodiment of the present utility model. The second input capacitor is C3, the second output capacitor is C4, the second non-isolated inductor is L2, and the third non-isolated inductor is L3.
The third switch module 21 includes a fifth switch tube Q1A and a sixth switch tube Q3A, where an input end of the fifth switch tube Q1A is connected to a first end of the second input capacitor C3, an output end of the fifth switch tube Q1A is connected to an input end of the sixth switch tube Q3A, an output end of the sixth switch tube Q3A is connected to a second end of the second input capacitor C3, and a first end of the second non-isolated inductor L2 is connected to a common end of the fifth switch tube Q1A and the sixth switch tube Q3A.
The fourth switch module 22 includes a seventh switch tube Q1B and an eighth switch tube Q3B, an input end of the seventh switch tube Q1B is connected to an input end of the fifth switch tube Q1A, an output end of the seventh switch tube Q1B is connected to an input end of the eighth switch tube Q3B, an output end of the eighth switch tube Q3B is connected to the fifth switch module Q1A and the sixth switch module Q3A, and a first end of the third non-isolated inductor L3 is connected to a common end of the seventh switch tube Q1B and the eighth switch tube Q3B.
The fifth switching module 23 includes a ninth switching tube Q2A and a tenth switching tube Q4A, an input end of the ninth switching tube Q2A is connected to the sixth switching module 24, an output end of the ninth switching tube Q2A is connected to an input end of the tenth switching tube Q4A, an output end of the tenth switching tube Q4A is connected to an output end of the sixth switching tube Q3A and an output end of the eighth switching tube Q3B, and a common end of the ninth switching tube Q2A and the tenth switching tube Q4A is connected to a second end of the second non-isolated inductor L2.
The sixth switching module 24 includes an eleventh switching tube Q2B and a twelfth switching tube Q4B, where an input end of the eleventh switching tube Q2B is connected to an input end of the ninth switching tube Q2A, an output end of the eleventh switching tube Q2B is connected to an input end of the twelfth switching tube Q4B, an output end of the twelfth switching tube Q4B is connected to an output end of the eighth switching tube Q3B, a common end of the eleventh switching tube Q2B and the twelfth switching tube Q4B is connected to a second end of the third non-isolated inductor L3, a first end of the second output capacitor C4 is connected to an input end of the eleventh switching tube Q2B, a second end of the second output capacitor C4 is connected to an output end of the twelfth switching tube Q4B, and the second output capacitor C4 is also connected to the second output port.
The bidirectional DCDC non-isolated communication circuit 2 further comprises a control and detection module 25, the control and detection module 25 is connected with the second output port, the upper computer, the fifth switching tube Q1A, the sixth switching tube Q3A, the seventh switching tube Q1B, the eighth switching tube Q3B, the ninth switching tube Q2A, the tenth switching tube Q4A, the eleventh switching tube Q2B and the twelfth switching tube Q4B, and the control and detection module 25 is used for detecting an output voltage and controlling a power trend according to the output voltage and a set voltage, so that the bidirectional DCDC non-isolated communication circuit 2 is in a BUCK, a BOOST and a critical conduction working mode in any direction. The control and detection module 25 includes a second DSP chip and a second driving unit, where the second DSP chip is connected to the second output port, the upper computer and the second driving unit to detect the output voltage, and compare the detected output voltage with the set voltage to output a control signal to the second driving unit, where the second driving unit includes but is not limited to a second driving chip, and the second driving chip is connected to the second DSP chip and the fifth switching tube Q1A, the sixth switching tube Q3A, the seventh switching tube Q1B, the eighth switching tube Q3B, the ninth switching tube Q2A, the tenth switching tube Q4A, the eleventh switching tube Q2B and the control end (not labeled in fig. 4) of the twelfth switching tube Q4B, and controls the on and off of each switching tube according to the control signal to perform a bidirectional communication in a dc-dc mode. It will be appreciated that capacitor C4 may also be the first input capacitor and capacitor C3 the first output capacitor.
The two-phase bidirectional DCDC non-isolated communication circuit is the same as the single-phase bidirectional DCDC non-isolated communication circuit in the above embodiment, and the following examples can be specifically mentioned by referring to the working ideas of the single-phase bidirectional DCDC non-isolated communication circuit in the above embodiment:
for example: when the capacitor C3 is used as a second input capacitor and the capacitor C4 is used as a second output capacitor, and the two-phase bidirectional DCDC non-isolated communication circuit 2 works in the Buck working mode, the fifth switching tube Q1A and the seventh switching tube Q1B are main switching tubes, the sixth switching tube Q3A and the eighth switching tube Q3B are follow-up tubes, and when Ton, the main switching tube Q1A and the seventh switching tube Q1B are closed to charge the second non-isolated inductor L2 and the third non-isolated inductor L3, and when Toff, the main switching tube Q1A and the seventh switching tube Q1B are opened, the follow-up tubes Q3A and Q3B are closed, and the currents of the second non-isolated inductor L2 and the third non-isolated inductor L3 are charged together to the second output capacitor C4 through the follow-up tubes Q3A and Q3B, respectively. The three-phase and above bidirectional DCDC non-isolated communication circuits are connected in a similar way to the connection way between the two-phase bidirectional DCDC non-isolated communication circuits, and are formed by a plurality of single-phase H-bridge four-switch non-isolated staggered parallel connection.
The two-phase bidirectional DCDC non-isolated communication circuit 2 is 180 degrees out of phase compared with the single-phase bidirectional DCDC non-isolated communication circuit 1, and the power level is improved. The utility model solves the problems of high cost, large volume and inconvenient application of the multi-phase H-bridge bidirectional DCDC isolation topology caused by the electric isolation component.
The embodiment of the utility model provides a communication power supply, which comprises the bidirectional DCDC non-isolated communication circuit described in the embodiment, and technical details and beneficial effects which are not described in detail in the embodiment can be seen in the bidirectional DCDC non-isolated communication circuit provided in the embodiment of the utility model.
Referring to fig. 5, fig. 5 is a block diagram of a remote device application system according to an embodiment of the present utility model. The remote equipment application system 3 comprises an input module 31, a DC/DC boosting module 32 and an output module 33, wherein the input module 31 is connected with the DC/DC boosting module 32, and the DC/DC boosting module 32 is also connected with the output module 33.
The input module 31 includes a resistor RS1 and a switch KMD1, the DC/DC boost module 32 includes a DC/DC boost unit 1, a DC/DC boost unit 2, and a DC/DC boost unit 3, and the output module 33 includes a resistor QFB1, a resistor QFB2, a resistor QFB3, a resistor QFB4, and a resistor QFB5.
The first end of the resistor RS1 is connected with minus 48V, the second end of the resistor RS1 is connected with the first end of the switch KMD1, the second end of the switch KMD1 is connected with the second end of the DC/DC boosting unit 1, the first end of the DC/DC boosting unit 1 is connected with RTN+, the third end of the DC/DC boosting unit 1 is grounded, and the fourth end and the fifth end of the DC/DC boosting unit 1 are connected with a load. The connection ideas of the DC/DC boosting unit 2 and the DC/DC boosting unit 3 are the same as the DC/DC boosting unit 1, and the connection relation of each port of the DC/DC boosting unit 1 can be specifically referred. In some embodiments, the remote device application system 3 further includes a detection and monitoring unit, where the detection and monitoring unit is connected to the sixth end of the DC/DC boost unit 1, the sixth end of the DC/DC boost unit 2, the sixth end of the DC/DC boost unit 3, and each output port. The load is a remote device, and the DC/DC BOOST module 32 includes the bidirectional DCDC non-isolated communication circuit 1 described in the above embodiment, and the output voltage is 57V-60V when the bidirectional DCDC non-isolated communication circuit works in the BOOST working mode.
According to the utility model, the bidirectional DCDC non-isolated communication circuit is applied to a remote equipment application system, and the bidirectional DCDC non-isolated communication circuit is set to be in a BOOST working mode, namely, the input voltage is subjected to BOOST conversion until the input voltage is boosted to a required voltage, so that independent voltage power supply is provided for a plurality of remote equipment.
Referring to fig. 6, fig. 6 is a block diagram of a combiner application system according to an embodiment of the present utility model. The combiner application system 4 comprises a switching power supply, a communication device, a battery common manager 41, a battery module 42 and a used lead-acid battery. The battery common manager 41 includes a monitoring module and a plurality of bidirectional power modules, the bidirectional power modules include bidirectional DCDC non-isolated communication circuits, the number of the bidirectional power modules is the same as the number of the batteries, and the number of the bidirectional power modules and the batteries are set according to practical situations, which is not particularly limited in the present utility model. The switching power supply is respectively connected with a plurality of bidirectional power supply modules, the switching power supply is also connected with the old lead-acid battery through the 48V busbar, the communication equipment is also connected with the switching power supply, and the bidirectional power supply modules are connected with the batteries in a one-to-one correspondence manner. In some embodiments, the combiner application system 4 further includes an FSU connected to the monitoring module, and the monitoring module is connected to the 48V busbar and each of the bidirectional power modules.
The combiner application system 4 has two working modes, the mode 1 is from top to bottom, the upper ends of the DCDC modules are connected to the 48V busbar in parallel, the lower ends of the DCDC modules are not connected in parallel, different batteries are connected independently, the batteries can be charged, meanwhile, the equipment can be supplied with power, the mode 2 combiner outputs, the lower ends of the DCDC modules are connected to different 48V power supply system inputs from bottom to top, and the upper ends of the DCDC modules and the lead-acid batteries are combined to output. Wherein the 48V power system input includes, but is not limited to, a battery, a DC input source.
According to the utility model, the bidirectional DCDC non-isolated communication circuit is applied to the combiner application system, so that bidirectional energy transfer and power supply between the battery and the equipment and mixed use of different types of power supplies can be realized, a large amount of lead-acid batteries and lithium batteries left by the eliminated 2/3G base station are utilized, and a large amount of resources are saved.
It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.
Claims (13)
1. A bidirectional DCDC non-isolated communication circuit, the bidirectional DCDC non-isolated communication circuit comprising:
the first switch module is connected with the first non-isolated inductor;
the first end of the first input capacitor is connected with the positive electrode of the power supply, and the second end of the first input capacitor is connected with the negative electrode of the power supply; the first end of the first switch module is connected with the first end of the first input capacitor, the second end of the first switch module is connected with the second end of the first input capacitor, the first end of the first non-isolation inductor is connected with the first switch module, the second end of the first non-isolation inductor is connected with the second switch module, the first end of the first output capacitor is connected with the first end of the second switch module, the second end of the first output capacitor is connected with the second end of the second switch module, and the second end of the second switch module is also connected with the second end of the first switch module.
2. The bi-directional DCDC non-isolated communication circuit of claim 1, wherein the first switch module comprises: a first switching tube and a second switching tube;
the input end of the first switching tube is connected with the first end of the first input capacitor, the output end of the first switching tube is connected with the input end of the second switching tube, the output end of the second switching tube is connected with the second end of the first input capacitor, and the public end of the first switching tube and the public end of the second switching tube are connected with the first end of the first non-isolation inductor.
3. The bi-directional DCDC non-isolated communication circuit of claim 2, wherein the second switch module comprises: a third switching tube and a fourth switching tube;
the output end of the third switch tube is connected with the input end of the fourth switch tube, the first end of the first output capacitor is connected with the input end of the third switch tube, the output end of the fourth switch tube is connected with the output end of the second switch tube, the second end of the first output capacitor is connected with the output end of the fourth switch tube, and the public end of the third switch tube and the public end of the fourth switch tube are connected with the second end of the first non-isolation inductor.
4. A bidirectional DCDC non-isolated communication circuit according to any of claims 1-3, further comprising a control and detection module, the control and detection module being connected to the control ends of the first output capacitor and the first, second, third, and fourth switching tubes;
the control and detection module is used for detecting output voltage and controlling power trend according to the output voltage and set voltage so that the bidirectional DCDC non-isolated communication circuit is in a BUCK, BOOST and critical conduction working mode in any direction.
5. A bidirectional DCDC non-isolated communication circuit, the bidirectional DCDC non-isolated communication circuit comprising: the second switch module is connected with the second input capacitor, the second output capacitor, the third switch module, the fourth switch module, the fifth switch module, the sixth switch module, the second non-isolation inductor and the third non-isolation inductor;
the first end of the second input capacitor is connected with the positive electrode of the power supply, the second end of the second input capacitor is connected with the negative electrode of the power supply, the first end of the third switch module is connected with the first end of the second input capacitor, the second end of the third switch module is connected with the second end of the second input capacitor, the first end of the second non-isolated inductor is connected with the third switch module, the second end of the second non-isolated inductor is connected with the fifth switch module, the second end of the fifth switch module is connected with the second end of the third switch module and the second end of the fourth switch module, the first end of the fourth switch module is connected with the first end of the third switch module, the first end of the third non-isolated inductor is connected with the fourth switch module, the first end of the sixth switch module is connected with the first end of the fifth switch module, the second end of the sixth switch module is connected with the fourth end of the sixth switch module, and the fourth end of the sixth switch module is connected with the fourth end of the sixth switch module.
6. The bidirectional DCDC non-isolated communication circuit of claim 5, wherein the third switching module comprises a fifth switching tube and a sixth switching tube;
the input end of the fifth switching tube is connected with the first end of the second input capacitor, the output end of the fifth switching tube is connected with the input end of the sixth switching tube, the output end of the sixth switching tube is connected with the second end of the second input capacitor, and the first end of the second non-isolated inductor is connected with the common end of the fifth switching tube and the sixth switching tube.
7. The bi-directional DCDC non-isolated communication circuit of claim 6, wherein said fourth switching module comprises a seventh switching tube and an eighth switching tube;
the input end of the seventh switching tube is connected with the input end of the fifth switching tube, the output end of the seventh switching tube is connected with the input end of the eighth switching tube, the output end of the eighth switching tube is connected with the fifth switching module and the sixth switching module, and the first end of the third non-isolated inductor is connected with the common end of the seventh switching tube and the eighth switching tube.
8. The bidirectional DCDC non-isolated communication circuit of claim 7, wherein the fifth switching module comprises a ninth switching tube and a tenth switching tube;
the input end of the ninth switching tube is connected with the sixth switching module, the output end of the ninth switching tube is connected with the input end of the tenth switching tube, the output end of the tenth switching tube is connected with the output end of the sixth switching tube and the output end of the eighth switching tube, and the public end of the ninth switching tube and the tenth switching tube is connected with the second end of the second non-isolated inductor.
9. The bidirectional DCDC non-isolated communication circuit of claim 8, wherein the sixth switching module includes an eleventh switching tube and a twelfth switching tube;
the input end of the eleventh switching tube is connected with the input end of the ninth switching tube, the output end of the eleventh switching tube is connected with the input end of the twelfth switching tube, the output end of the twelfth switching tube is connected with the output end of the eighth switching tube, the common end of the eleventh switching tube and the twelfth switching tube is connected with the second end of the third non-isolated inductor, the first end of the second output capacitor is connected with the input end of the eleventh switching tube, and the second end of the second output capacitor is connected with the output end of the twelfth switching tube.
10. The bidirectional DCDC non-isolated communication circuit of any of claims 5-9, further comprising a control and detection module, the control and detection module connecting the second output capacitor and the control terminals of the fifth switching tube, the sixth switching tube, the seventh switching tube, the eighth switching tube, the ninth switching tube, the tenth switching tube, the eleventh switching tube, the twelfth switching tube;
the control and detection module is used for detecting output voltage and controlling power trend according to the output voltage and set voltage so that the bidirectional DCDC non-isolated communication circuit is in a BUCK, BOOST and critical conduction working mode in any direction.
11. A communication power supply comprising the bidirectional DCDC non-isolated communication circuit of any of claims 1-10.
12. A remote device application system, characterized in that it comprises the bidirectional DCDC non-isolated communication circuit according to any of claims 1-10.
13. A combiner application, characterized in that it comprises the bidirectional DCDC non-isolated communication circuit of any of claims 1-10.
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|---|---|---|---|
| CN202321113468.2U CN219875495U (en) | 2023-05-06 | 2023-05-06 | Bidirectional DCDC non-isolated communication circuit, communication power supply, remote equipment application system and combiner application system |
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| CN202321113468.2U CN219875495U (en) | 2023-05-06 | 2023-05-06 | Bidirectional DCDC non-isolated communication circuit, communication power supply, remote equipment application system and combiner application system |
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