CN211557151U - Low-delay self-adaptive bidirectional DCDC converter - Google Patents
Low-delay self-adaptive bidirectional DCDC converter Download PDFInfo
- Publication number
- CN211557151U CN211557151U CN201922102174.XU CN201922102174U CN211557151U CN 211557151 U CN211557151 U CN 211557151U CN 201922102174 U CN201922102174 U CN 201922102174U CN 211557151 U CN211557151 U CN 211557151U
- Authority
- CN
- China
- Prior art keywords
- power switch
- diode
- dcdc
- conversion unit
- switch tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a two-way DCDC converter of self-adaptation of low time delay, the two-way DCDC converter of self-adaptation of low time delay include voltage source, first DCDC transform unit, second DCDC transform unit, third DCDC transform unit, first external circuit and second external circuit, the voltage source both links to each other with first DCDC transform unit and first external circuit through diode D1, links to each other with first external circuit after again through second DCDC transform unit and diode D2, and third DCDC transform unit both with second external circuit connection, link to each other with first DCDC transform unit again. The utility model discloses a two reverse parallelly connected DCDC transform units reach the purpose of two-way transform to supplementary parallelly connected DCDC transform unit utilizes the hardware detection mode of logic circuit pressure drop, simplifies the circuit and detects the flow of switching, improves operating speed, and can realize the multiplexed output.
Description
Technical Field
The utility model relates to a power electronics technical field especially relates to a two-way DCDC converter of self-adaptation of low time delay.
Background
DC/DC conversion is an operation mode in which the magnitude of the output effective voltage is controlled by adjusting the PWM (duty ratio) of the original direct current.
The bidirectional DC/DC converter has the advantages of bidirectional energy flow, simple control method, compact topological structure and the like. The advantages enable the bidirectional DC/DC converter to have wide application prospects, but the existing bidirectional DC/DC converter has the defects that the detection mode is slow in detection speed, the switching process is complex, the switching speed is slow, the bidirectional DC/DC converter cannot carry out multi-path output, and the bidirectional DC/DC converter cannot be designed differently, and a lot of troubles are brought to the aspects of design and daily use of the bidirectional DC/DC converter.
At present, the application of the DCDC converter is more and more extensive, two double-interleaving parallel bidirectional DCDC converters are available, and an interleaving parallel technology is adopted, so that the current and current ripples of an input end and an output end can be reduced, the switching frequency is improved, the volume of an energy storage inductor can be further reduced, and the current capacity and the power density of the converter are improved.
However, the interleaved bidirectional DC/DC converter has the disadvantages of large ripple of inductive current and non-uniform inductive current of two phases, and the reaction speed of the whole circuit is reduced by adding a large capacitor to suppress the signal influence caused by voltage fluctuation of the circuit outside the converter. In the signal detection link, a signal sampling module is required to be used for carrying out information sampling on various electronic signals, the electronic signals are subjected to filtering amplification and then are analyzed and calculated through a digital signal processing chip, and then a working mode is selected, so that the sampling process utilizes a plurality of components in circuit topology, the process is complex, the switching flow is long, and the switching speed is low. In addition, the input end and the output end of the traditional staggered parallel bidirectional DC/DC converter are both single ports, so that the multipath output of the circuit cannot be realized, the limitation is brought to the design of the whole circuit, and in the switching-on and switching-off process of the MOS transistor, the loss is large, and the electric energy efficiency is low.
For example, a three-phase interleaved bidirectional high-ratio DCDC converter and a control method thereof disclosed in chinese patent document, whose publication number "CN 108988634A" includes a low-voltage side, a bridge arm unit, and a high-voltage side connected in sequence, the low-voltage side being connected to a first power supply; the high-voltage side is connected with a second power supply; although the DCDC converter carries out control of different time sequences on the three-phase staggered bidirectional high-transformation-ratio DCDC converter, two working modes of Boost and Buck are realized, multi-path output cannot be realized, the circuit switching speed is low, the loss is large due to frequent switching-off of MOS (metal oxide semiconductor) tubes, and the conversion efficiency of electric energy is low.
Disclosure of Invention
The utility model relates to an it is complicated to overcome two-way DC converter circuit sampling process of tradition, the flow is long, circuit switching speed is slow, the technical problem of multidirectional output can not be carried out to the electric energy inefficiency, a two-way DCDC converter of self-adaptation of low time delay is provided, through two reverse parallelly connected DCDC converters, reach the purpose of two-way transform, and supplementary parallelly connected with a DCDC converter, the simplified circuit, utilize the hardware detection mode of logic circuit pressure drop, the flow of detecting the switching has been simplified, the operating speed is improved, and can realize the multiplexed output.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a two-way DCDC converter of self-adaptation of low time delay, including voltage source, first DCDC transform unit, second DCDC transform unit, third DCDC transform unit, first external circuit and second external circuit, the voltage source both links to each other with diode D1's negative pole, and links to each other with the one end of second DCDC transform unit again, and diode D1's positive pole links to each other with the one end of first DCDC transform unit, the other end of second DCDC transform unit links to each other with diode D2's positive pole, the other end of first DCDC transform unit links to each other with diode D2's negative pole all the way, and another way links to each other with first external circuit, and link to each other with the one end of third DCDC transform unit all the way in addition, the third DCDC transform unit other end and second external circuit connection, the voltage source provides driving voltage for first DCDC transform unit. The utility model discloses a two reverse parallelly connected DCDC transform units, reach the purpose of two-way transform, and supplementary parallelly connected with a DCDC transform unit, realize the differentiation design of DCDC converter, simplify the circuit, utilize the reverse function of ending of diode, carry out the system of clamping of voltage, realize that the automation of two one-way DC/DC transform units opens and stops the function, switching speed has been improved, utilize the voltage difference of each node in the logic circuit, reach the hardware detection mode according to voltage automatic identification, the speed of detecting the link has been improved, and the flow of detecting the switching has been simplified, and the operating speed is improved, and can realize multiplexed output.
Preferably, the second DCDC conversion unit is a Boost non-isolated Boost converter, and includes an inductor L1, a power switch tube S1, and a diode D3, one end of the inductor L1 is connected to the anode of the input voltage Vin2, that is, the voltage input by the voltage source, the other end of the inductor L1 is connected to the drain of the power switch tube S1 and the anode of the diode D3, the cathode of the diode D3 is connected to the anode of the output voltage Vou2, that is, the voltage at the anode of the diode D2, the source of the power switch tube S1 is connected to the cathode of the output voltage Vou2, the cathode of the output voltage Vou2 is connected to the cathode of the input voltage Vin2, and the gate of the power switch tube S1 is connected to the PWM signal. The requirement of the fastest reaction is met through the most basic principles of the circuit voltage from high to low, the DC/DC converter low-voltage automatic closing principle and the like, the low-delay quick response can be really realized, and the continuous stability of the voltage is ensured.
Preferably, the first DCDC conversion unit is a Buck non-isolated Buck converter, and includes an inductor L3, a power switch tube S3 and a diode D5, a drain of the power switch tube S3 is connected to an anode of an input voltage Vin1, that is, a voltage provided by a first external circuit, a gate of the power switch tube S3 is connected to a PWM signal, one end of the inductor L3 is connected to both a source of the power switch tube S3 and a cathode of the diode D5, the other end of the inductor L3 is connected to an anode of an output voltage Vou1, that is, a voltage at an anode of the diode D1, an anode of the diode D5 is connected to a cathode of the output voltage Vou1, and a cathode of the output voltage Vou1 is connected to a cathode of the input voltage Vin 1.
Preferably, the first DCDC conversion unit further includes an inductor L4, a diode D6, and a power switch tube S4, and a series circuit of an inductor L4 and a power switch tube S4 is connected in parallel to both ends of a series circuit of the inductor L3 and the power switch tube S3 of the first DCDC conversion unit.
Preferably, the drain of the power switch tube S4 is connected to the drain of the power switch tube S3, the gate of the power switch tube S4 is connected to the PWM signal, one end of the source of the power switch tube S4 is connected to both one end of the inductor L4 and the cathode of the diode D6, and the anode of the diode D6 is connected to the cathode of the input voltage Vin 1.
Preferably, the second DCDC conversion unit is an isolated converter, and includes a converter primary side circuit and a converter secondary side circuit, which are connected through a transformer T, the converter secondary side circuit includes an inductor L2, a diode D4, a power switch tube S2, a resistor RL and a capacitor Cf, the inductor L2 is connected with the anode of the diode D4, a series circuit of an inductor L2 and a diode D5 is connected in parallel with a series circuit of an inductor L1 and a diode D6, the capacitor Cf and the resistor RL are connected in parallel between the anode of a diode D4 and the cathode of an input voltage Vin2, a power switch tube S2 is connected between the cathode of the diode D4 and the cathode of the input voltage Vin2, the drain of the power switch tube S2 is connected with the anode of the diode D4, the source of the power switch tube S2 is connected with the cathode of the output voltage Vou2, and the gate of the power switch tube S2 is connected with a PWM signal. The transformer adopts a high-frequency transformer, the system obtains higher reliability through electrical isolation, the traditional power frequency transformer is replaced, and the size and the weight of the system are reduced.
Preferably, the primary side circuit of the converter is in a full-bridge structure, is an input end, and comprises four power switch tubes, namely a power switch tube Q1, a power switch tube Q2, a power switch tube Q3 and a power switch tube Q4, gates of the four switch tubes, namely the power switch tube Q1, the power switch tube Q2, the power switch tube Q3 and the power switch tube Q4, are all connected with a PWM signal, a midpoint a is arranged on a bridge arm connecting line between the two switch tubes of the power switch tube Q1 and the power switch tube Q3, a midpoint B is arranged on a bridge arm connecting line between the two switch tubes of the power switch tube Q2 and the power switch tube Q4, and a dc contactor switch K1 is connected between a drain electrode of the power switch tube Q1 and an anode electrode of the input voltage Vin 2. The power switch device of the primary side circuit H bridge can realize soft switching control, the switching loss is reduced, the direct current contactor K1 selects the direct current special vacuum contactor, the working frequency of the whole machine can be improved to more than 10KHz, the arc discharge phenomenon is prevented, the reliability is improved, and the start and stop of the second DCDC conversion unit can be manually controlled.
Preferably, the third DCDC conversion unit is a buck circuit or a boost circuit, the first DCDC conversion unit, the second DCDC conversion unit and the third DCDC conversion unit are unidirectional converters, and the unidirectional converters are isolated converters or non-isolated converters. The third DCDC conversion unit is a BUCK BUCK type circuit, and the function of the third DCDC conversion unit can be set according to actual requirements.
Preferably, the PWM signal is generated by an external single chip or a PWM signal generating circuit, and after the PWM signal with a modulated pulse width is generated, the duty ratio thereof is adjusted through voltage feedback, thereby achieving the purpose of stabilizing the output voltage.
Because the upper and lower unidirectional DC/DC converters are mutually isolated, each DC/DC converter is designed in a differentiation mode, the multi-path output of the circuit can be realized, the multi-path output function of the circuit is realized, the overall design is optimized, and the design difficulty is reduced.
The utility model has the advantages that: (1) the hardware detection mode of the logic circuit is adopted, and the voltage difference of each node in the logic circuit is utilized, so that the hardware detection mode of automatic identification according to the voltage is achieved, and the speed of a detection link is improved; (2) the reverse cut-off function of the diode is utilized to clamp the voltage, the automatic start-stop function of the two unidirectional DC/DC modules is realized, and the switching speed is improved; (3) the novel circuit structure utilizes the principle that two unidirectional DC/DC are mutually isolated from each other from top to bottom, carries out differentiation design on each DC/DC converter, can realize the multi-path output of the circuit, realizes the multi-path output function of the circuit, optimizes the overall design and reduces the design difficulty.
Drawings
Fig. 1 is a block diagram of a circuit principle connection structure of the present invention.
Fig. 2 is a schematic diagram of a Boost circuit of the second DCDC conversion unit according to the present invention.
Fig. 3 is a schematic diagram of a BUCK circuit of the first DCDC conversion unit according to the present invention.
Fig. 4 is a schematic block diagram of another BUCK circuit of the first DCDC conversion unit according to the present invention.
Fig. 5 is another schematic structure diagram of the Boost circuit of the second DCDC conversion unit according to the present invention.
In the figure, 1, a voltage source, 2, a first DCDC conversion unit, 3, a second DCDC conversion unit, 4, a third DCDC conversion unit, 5, a first external circuit, 6, and a second external circuit.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example 1: a low-delay adaptive bidirectional DCDC converter of this embodiment, as shown in fig. 1, includes a voltage source 1, a first DCDC conversion unit 2, a second DCDC conversion unit 3, a third DCDC conversion unit 4, a first external circuit 5, and a second external circuit 6, where the voltage source 1 is connected to both the cathode of a diode D1 and one end of the second DCDC conversion unit 3, the anode of a diode D1 is connected to one end of the first DCDC conversion unit 2, the other end of the second DCDC conversion unit 3 is connected to the anode of a diode D2, one path of the other end of the first DCDC conversion unit 2 is connected to the cathode of a diode D2, the other path is connected to the first external circuit 5, and another path is connected to one end of the third DCDC conversion unit 4, the other end of the third DCDC conversion unit 4 is connected to the second external circuit 6, and the voltage source 1 provides a driving voltage for the first DCDC conversion unit 2.
As shown in fig. 2, the second DCDC conversion unit 3 is a Boost non-isolated Boost converter, and includes an inductor L1, a power switch tube S1 and a diode D3, one end of the inductor L1 is connected to the positive electrode of the input voltage Vin2, that is, the voltage input by the voltage source (1), the other end of the inductor L1 is connected to both the drain of the power switch tube S1 and the positive electrode of the diode D3, the negative electrode of the diode D3 is connected to the positive electrode of the output voltage Vou2, that is, the voltage at the positive electrode of the diode D2, the source of the power switch tube S1 is connected to the negative electrode of the output voltage Vou2, the negative electrode of the output voltage Vou2 is connected to the negative electrode of the input voltage Vin2, and the gate of the power switch tube S1 is connected to the PWM signal.
DC/DC conversion is an operation mode in which the magnitude of the output effective voltage is controlled by adjusting the PWM (duty ratio) of the original direct current. An external singlechip or a PWM signal generating circuit generates PWM signals with modulatable pulse width, and the duty ratio of the PWM signals is adjusted through voltage feedback, so that the purpose of stabilizing output voltage is achieved.
As shown in fig. 3, the first DCDC conversion unit 2 is a Buck non-isolated Buck converter, and includes an inductor L3, a power switch tube S3 and a diode D5, a drain of the power switch tube S3 is connected to an anode of an input voltage Vin1, that is, a voltage provided by the first external circuit 5, a gate of the power switch tube S3 is connected to a PWM signal, one end of the inductor L3 is connected to both a drain of the power switch tube S3 and a cathode of the diode D5, the other end of the inductor L3 is connected to an anode of an output voltage Vou1, that is, an anode voltage of the diode D1, an anode of the diode D5 is connected to a cathode of the output voltage Vou1, and a cathode of the output voltage Vou1 is connected to a cathode of the input voltage Vin 1.
In embodiment 1, the second DCDC conversion unit 3 and the first DCDC conversion unit employ non-isolated unidirectional converters, and the third DCDC conversion unit is a BUCK type circuit, and its functions may be set according to actual requirements.
Example 2: a low-delay adaptive bidirectional DCDC converter of this embodiment is shown in fig. 4: the first DCDC conversion unit 2 comprises an inductor L4, a diode D6 and a power switch tube S4, a series circuit of an inductor L4 and a power switch tube S4 is connected in parallel at two ends of a series circuit of the inductor L3 and the power switch tube S3 of the first DCDC conversion unit 2, a drain of the power switch tube S4 is connected with a drain of the power switch tube S3, a gate of the power switch tube S4 is connected with a PWM signal, one end of a drain of the power switch tube S4 is connected with one end of the inductor L4 and a cathode of the diode D6, and an anode of the diode D6 is connected with a cathode of the input voltage Vin 1.
As shown in fig. 5, the second DCDC conversion unit 3 is an isolated converter, and includes a converter primary side circuit and a converter secondary side circuit, which are connected through a transformer T, the converter secondary side circuit includes an inductor L2, a diode D4, a power switch tube S2, a resistor RL and a capacitor Cf, the inductor L2 is connected to the anode of the diode D4, a series circuit of an inductor L2 and a diode D5 is connected in parallel to a series circuit of an inductor L1 and a diode D6, the capacitor Cf and the resistor RL are connected in parallel between the anode of a diode D4 and the cathode of an input voltage Vin2, a power switch tube S2 is connected between the cathode of a diode D4 and the cathode of the input voltage Vin2, the drain of the power switch tube S2 is connected to the anode of the diode D4, the source of the power switch tube S2 is connected to the cathode of the output voltage Vou2, and the gate of the power switch tube S2 is connected to the PWM signal.
The primary side circuit of the converter is in a full-bridge structure and is an input end and comprises four power switching tubes including a power switching tube Q1, a power switching tube Q2, a power switching tube Q3 and a power switching tube Q4, the grids of the four switching tubes including the power switching tube Q1, the power switching tube Q2, the power switching tube Q3 and the power switching tube Q4 are all connected with a PWM signal, a middle point A is arranged on a bridge arm connecting line between the two switching tubes including the power switching tube Q1 and the power switching tube Q3, a middle point B is arranged on a bridge arm connecting line between the two switching tubes including the power switching tube Q2 and the power switching tube Q4, and a direct current contactor switch K1 is connected between the drain electrode of the power switching tube Q1 and the positive electrode of an input voltage Vin 2. The power switch device of the primary side circuit H bridge can realize soft switching control, the switching loss is reduced, the direct current contactor K1 selects the direct current special vacuum contactor, the working frequency of the whole machine can be improved to more than 10KHz, the arc discharge phenomenon is prevented, the reliability is improved, and the start and stop of the second DCDC conversion unit can be manually controlled.
In embodiment 2, the second DCDC conversion unit adopts an isolated full-bridge DCDC converter, and the rest of the structure is the same as that in embodiment 1. The embodiment is a further innovation developed on the basis of the technical scheme of the embodiment 1, realizes high-voltage transformation ratio and high-power bidirectional transmission, realizes zero-voltage switching-on and zero-current switching-off, has higher efficiency, and can realize voltage boosting or voltage reduction by adjusting the turn ratio of the transformer.
The utility model discloses well power switch tube element can adopt the MOS pipe, also can adopt the triode.
The utility model discloses well first DCDC transform unit, second DCDC transform unit and third DCDC transform unit, for the one-way converter, the one-way converter is isolated form converter or non-isolated form converter. The third DCDC conversion unit is a voltage reduction type circuit or a voltage increase type circuit, and the function of the third DCDC conversion unit can be set according to actual requirements. The non-isolated converter has the advantages of high conversion efficiency, small size and low cost, the isolated converter has the advantages of strong anti-interference capability, easiness in realizing buck-boost conversion and high safety, and the isolated converter has small damage to a load after a power supply is in one field and can be selected according to requirements in actual production.
In embodiments 1 and 2, the voltage source 1 provides a driving voltage for the second DCDC conversion unit 3, and the output voltage Vou2 of the second DCDC conversion unit 3 is slightly smaller than the port voltage of the first external circuit 5 through the Boost circuit, that is, the voltage at the positive terminal of the diode D2 is smaller than the voltage at the negative terminal of the diode D2;
when the input voltage Vin1 at the right port of the first DCDC conversion unit 2 reaches the start voltage, the first DCDC conversion unit 2 automatically starts to operate;
when the voltage of the first external circuit 5 is stable and the output voltage Vou2 of the second DCDC conversion unit 3 is less than the port voltage of the first external circuit 5, the isolation diode D2 connected in series with the second DCDC conversion unit 3 is turned off in the reverse direction, and the second DCDC conversion unit 3 operates in an idle state;
when the port voltage of the first external circuit 5 is decreased, the first DCDC conversion unit 2 is automatically turned off because the input voltage of the first DCDC conversion unit 2 is lower than the start voltage of the first DCDC conversion unit.
When the port voltage of the first external circuit 5 is lowered due to a fault in the first external circuit 5 and the port voltage of the first external circuit 5 is lower than the output voltage Vou2 of the second DCDC conversion unit 3, the isolation diode D2 is naturally turned on and the second DCDC conversion unit 3 operates in a load state.
The traditional bidirectional DC/DC converter needs to switch function modes through three links of detection, analysis and selection and switching, and has long flow, large fixed time delay and reduced reliability of the whole circuit.
The utility model discloses do not rely on and gather voltage signal, change into the hardware detection mode that utilizes the logic circuit pressure drop from original software detection mode that utilizes digital signal processing technique, utilize the voltage difference of each node among the logic circuit, reach the hardware detection mode according to voltage automatic identification, simplified the flow that detects the switching, improved the speed that detects the link, improve operating speed, can realize the quick response of low time delay, realize automated inspection automatic switch-over, the loaded down with trivial details unnecessary step has been saved.
The utility model discloses utilized two diodes to reach the function of two-way end, carried out the voltage clamp system, carried out automatic switch-over according to the conducting state that outside voltage automatic change diode, realized the automatic start-stop function of two one-way DC/DC modules, improved the switching speed of whole module, shortened work flow; the requirement of the fastest reaction is met through the most basic principles of forward conduction and reverse cut-off of the diode, circuit voltage from high to low, low-voltage automatic closing principle of the DC/DC converter and the like, the low-delay quick response can be really realized, and the continuous stability of the voltage is ensured. The design is simpler, the design difficulty is reduced, the reliability of the bidirectional DC/DC module is improved, and the safety of the storage battery is ensured.
The traditional bidirectional DC/DC module is difficult to realize the differential design of input voltage and output voltage, and because a staggered parallel connection structure is adopted and only single-path input and single-path output are adopted, great limitation is brought to the design of the whole circuit.
The utility model discloses utilize the principle of one-way DC/DC mutual isolation, carry out the differentiation design to every DC/DC converter to can realize the multiplexed output of circuit, realize the multiplexed output function of circuit, make the design of whole circuit simpler, reduce the design degree of difficulty, and carry out the differentiation design of circuit according to actual conditions, can satisfy the requirement of circuit design under the different circumstances, it is more nimble; because the unidirectional DC/DC structure is simpler, the electric energy loss in the electric energy transmission process is smaller, the electric energy conversion efficiency is higher, the circuit structure is simplified, the switching times of the power tube are reduced, the loss in the circuit is reduced, and the electric energy conversion efficiency is improved.
Claims (9)
1. A low-delay self-adaptive bidirectional DCDC converter is characterized by comprising a voltage source (1), a first DCDC conversion unit (2), a second DCDC conversion unit (3), a third DCDC conversion unit (4), a first external circuit (5) and a second external circuit (6), wherein the voltage source (1) is connected with the cathode of a diode D1 and one end of the second DCDC conversion unit (3), the anode of a diode D1 is connected with one end of the first DCDC conversion unit (2), the other end of the second DCDC conversion unit (3) is connected with the anode of a diode D2, the other end of the first DCDC conversion unit (2) is connected with the cathode of a diode D2, the other end of the diode D1 is connected with the first external circuit (5), the other end of the diode D1 is connected with one end of the third DCDC conversion unit (4), and the other end of the third DCDC conversion unit (4) is connected with the second external circuit (6), the voltage source (1) provides a driving voltage for the first DCDC conversion unit (2).
2. The low-delay self-adaptive bidirectional DCDC converter as claimed in claim 1, wherein said second DCDC conversion unit (3) is a Boost non-isolated Boost converter, and comprises an inductor L1, a power switch tube S1 and a diode D3, one end of said inductor L1 is connected to the positive electrode of the input voltage Vin2, i.e. the voltage inputted by the voltage source (1), the other end of the inductor L1 is connected to both the drain of the power switch tube S1 and the positive electrode of the diode D3, the negative electrode of said diode D3 is connected to the positive electrode of the output voltage Vou2, i.e. the voltage at the positive electrode of the diode D2, the source of said power switch tube S1 is connected to the negative electrode of the output voltage Vou2, the negative electrode of the output voltage Vou2 is connected to the negative electrode of the input voltage Vin2, and the gate of said power switch tube S1 is connected to the PWM signal.
3. The low-delay self-adaptive bidirectional DCDC converter as claimed in claim 1, wherein said first DCDC conversion unit (2) is a Buck-type non-isolated Buck converter, and comprises an inductor L3, a power switch tube S3 and a diode D5, the drain of said power switch tube S3 is connected to the positive pole of the input voltage Vin1, i.e. the voltage provided by the first external circuit (5), the gate of said power switch tube S3 is connected to the PWM signal, one end of said inductor L3 is connected to both the source of the power switch tube S3 and the negative pole of the diode D5, the other end of said inductor L3 is connected to the positive pole of the output voltage Vou1, i.e. the voltage at the positive pole of the diode D1, the positive pole of the diode D5 is connected to the negative pole of the output voltage Vou1, and the negative pole of the output voltage Vou1 is connected to the negative pole of the input voltage 1.
4. The low-latency adaptive bidirectional DCDC converter according to claim 3, wherein said first DCDC conversion unit (2) further comprises an inductor L4, a diode D6 and a power switch tube S4, and a series circuit of an inductor L4 and a power switch tube S4 is connected in parallel to two ends of a series circuit of an inductor L3 and a power switch tube S3 of said first DCDC conversion unit (2).
5. The adaptive bidirectional DCDC converter with low delay time of claim 4, wherein the drain of said power switch tube S4 is connected to the drain of power switch tube S3, the gate of said power switch tube S4 is connected to the PWM signal, one end of the source of said power switch tube S4 is connected to both one end of inductor L4 and the cathode of diode D6, and the anode of said diode D6 is connected to the cathode of input voltage Vin 1.
6. The low-delay self-adaptive bidirectional DCDC converter as claimed in claim 2, wherein said second DCDC conversion unit (3) is an isolated converter comprising a converter primary side circuit and a converter secondary side circuit, both of which are connected through a transformer T, the converter secondary side circuit comprises an inductor L2, a diode D4, a power switch tube S2, a resistor RL and a capacitor Cf, the inductor L2 is connected with the anode of the diode D4, the series circuit of the inductor L2 and the diode D5 is connected in parallel with the series circuit of the inductor L1 and the diode D6, the capacitor Cf and the resistor RL are connected in parallel between the anode of the diode D4 and the cathode of the input voltage Vin2, the power switch tube S2 is connected between the cathode of the diode D4 and the cathode of the input voltage Vin2, the drain of the power switch tube S2 is connected with the anode of the diode D4, the source of the power switch tube S2 is connected with the cathode of the output voltage Vou2, the gate of the power switch S2 is connected to the PWM signal.
7. The low-delay self-adaptive bidirectional DCDC converter as claimed in claim 6, wherein said converter primary side circuit is a full bridge structure, and is an input end, and comprises four power switch transistors of power switch transistor Q1, power switch transistor Q2, power switch transistor Q3 and power switch transistor Q4, the gates of said four power switch transistors of power switch transistor Q1, power switch transistor Q2, power switch transistor Q3 and power switch transistor Q4 are all connected with PWM signal, the bridge arm connecting line between two power switch transistors of power switch transistor Q1 and power switch transistor Q3 is provided with midpoint A, the bridge arm connecting line between two power switch transistors of power switch transistor Q2 and power switch transistor Q4 is provided with midpoint B, and a DC contactor K1 is connected between the drain of power switch transistor Q1 and the positive pole of input voltage 2.
8. The adaptive bidirectional DCDC converter with low latency according to claim 1, wherein the third DCDC conversion unit is a buck-type circuit or a boost-type circuit, the first DCDC conversion unit, the second DCDC conversion unit and the third DCDC conversion unit are unidirectional converters, and the unidirectional converters are isolated converters or non-isolated converters.
9. A low-delay adaptive bidirectional DCDC converter as recited in claim 2, 3, 5 or 6, wherein said PWM signal is generated by an external single-chip microcomputer or PWM signal generating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102174.XU CN211557151U (en) | 2019-11-26 | 2019-11-26 | Low-delay self-adaptive bidirectional DCDC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102174.XU CN211557151U (en) | 2019-11-26 | 2019-11-26 | Low-delay self-adaptive bidirectional DCDC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211557151U true CN211557151U (en) | 2020-09-22 |
Family
ID=72502747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922102174.XU Active CN211557151U (en) | 2019-11-26 | 2019-11-26 | Low-delay self-adaptive bidirectional DCDC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211557151U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968610A (en) * | 2021-02-24 | 2021-06-15 | 北京交通大学 | Bidirectional isolation type DC/DC converter |
-
2019
- 2019-11-26 CN CN201922102174.XU patent/CN211557151U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112968610A (en) * | 2021-02-24 | 2021-06-15 | 北京交通大学 | Bidirectional isolation type DC/DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108448913B (en) | Single-stage isolated AC-DC converter based on staggered parallel bridgeless PFC circuit and LLC resonance | |
| CN103944397A (en) | Boost type isolated DC/DC converter and control method thereof | |
| CN102299649B (en) | Supply convertor | |
| CN110719035B (en) | Topological structure of single-stage DAB-LLC hybrid bidirectional DC-DC converter | |
| CN100438286C (en) | Dual-tube dual-forward-excitation boosting type single-stage power factor correction circuit | |
| CN106487226B (en) | Tri- level Buck converter of IPOP, cascade system and its control method | |
| CN106026749A (en) | Topology variable micro inverter and digital control device thereof | |
| CN108631604B (en) | Environment-friendly double-transformer type zero-current resonance three-level direct current converter | |
| CN110957922A (en) | Single-stage high-frequency isolated bidirectional direct-current converter and grid-connected energy storage system | |
| CN110277912B (en) | Direct current boost conversion circuit | |
| CN110957923A (en) | High-frequency isolation bidirectional direct current converter based on phase-shifted full bridge and grid-connected energy storage system | |
| CN210724563U (en) | T gamma novel boost DC-DC converter topology | |
| CN215934730U (en) | DC-DC converter with high step-up ratio | |
| CN114465479A (en) | Three-port bidirectional DC/DC converter soft switching circuit and device thereof | |
| CN205490142U (en) | Switched inductor boost converter | |
| CN112398330B (en) | Bridgeless PFC converter and control method thereof | |
| CN211557151U (en) | Low-delay self-adaptive bidirectional DCDC converter | |
| CN213243821U (en) | Boost converter with tap inductor and active side resonance unit | |
| CN106787900B (en) | Boosting gird-connected inverter and its control method | |
| CN112072914B (en) | Three-port direct current converter for hybrid energy storage | |
| CN102158090A (en) | Boost converter with built-in transformer and voltage-doubling unit of switching capacitor | |
| CN109698633A (en) | A kind of enhancement type bi-directional Z-source inverter | |
| CN111130351B (en) | Low-delay self-adaptive bidirectional DCDC converter and control method thereof | |
| CN212381120U (en) | Efficient bidirectional four-pipe BUCK-BOOST converter | |
| CN114205954A (en) | Electrolytic-capacitor-free control method for improved Sepic-LED driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |