CN1625033A - Bidirection DC/DC converter with neutral point - Google Patents
Bidirection DC/DC converter with neutral point Download PDFInfo
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- CN1625033A CN1625033A CN 200310119402 CN200310119402A CN1625033A CN 1625033 A CN1625033 A CN 1625033A CN 200310119402 CN200310119402 CN 200310119402 CN 200310119402 A CN200310119402 A CN 200310119402A CN 1625033 A CN1625033 A CN 1625033A
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- 238000004146 energy storage Methods 0.000 claims abstract description 20
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- 230000002457 bidirectional effect Effects 0.000 claims description 60
- 238000007600 charging Methods 0.000 claims description 8
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- HCOLPNRPCMFHOH-UHFFFAOYSA-N Prodigiosin Natural products CCCCCC1C=C(C=C/2N=C(C=C2OC)c3ccc[nH]3)N=C1C HCOLPNRPCMFHOH-UHFFFAOYSA-N 0.000 description 1
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Abstract
A double way DC/ DC transformation device with neutral point, including: the first DC voltage end and the second DC voltage end with neutral point; the inductor for energy buffering; the first electronic power switch that series connects to the inductor and bridge joint with the positive and the negative poles of the first DC voltage end and controls the storage and delivery of the induction; the second electronic power switch with one end connecting to the inductor and the joint point of the first electronic power switch, and the other end connecting to the positive pole of the DC voltage and controls the energy storage and delivery of the inductor; the first and the second diodes parallel to the first and the second electronic power switches; the condenser bridge joints between the positive end of the first and the second DC voltage to store the delivery of the inductor; the controller connects to the controlling end of the electronic power switch to control the conduction and break of the electronic power switch; this device can carry out double way energy transformation with voltage-doubling circuit with neutral point and semi-voltage circuit of the neutral point.
Description
Technical field
The present invention relates to a kind of DC/DC conversion device, particularly a kind of bidirectional, dc/current/direct-current conversion device of tool neutral point.
Background technology
Commonly use the DC/DC conversion circuit, as shown in Figure 1, it is to belong to a dc/dc boost converter [DC/DC booster converter] 1.This dc/dc boost converter 1 comprises an input 11, an electronic power switch 12, an output 13, an inductor 14, a diode 15 and a capacitor 16.When by these input 11 input DC power voltages, mat is controlled the conduction and cut-off of this electronic power switch 12, making inductor 14 carry out energy storage/release can, releasing of this inductor 14 can be through 15 pairs of capacitors of diode 16 charging, and sets up one at this capacitor 16 and be higher than the output voltage of the voltage of this input 11 with supply output terminal 13.Yet the output of this dc/dc boost converter only has two end points that one neutral point output can't be provided, and makes this dc/dc boost converter be unable to supply the equipotential output dc voltage of two serial connections, and can only allow the energy folk prescription to transmission.Yet in many application, dc/dc boost converter needs the neutral point output, and the function of prodigiosin bi-directional.
The single-phase semi-bridge formula inverter (inverter) of UPS for example, it must be by the neutral point output of dc/dc boost converter, supply two equal direct voltage to two dc capacitors, can make this single-phase semi-bridge formula inverter normal running, but and need the energy bi-directional, so that have the function of reverse charging.
In addition, the three-phase and four-line formula inverter of UPS for example, it also needs the neutral point output by a dc/dc boost converter, supply two equal direct voltage to two dc capacitors, can make this three-phase and four-line formula inverter normal running, but and need the energy bi-directional, so that have the function of reverse charging.
In brief, the dc/dc boost converter of commonly using can't provide the neutral point output, thereby is unable to supply two equal direct voltages, and its energy can't make bi-directional, thereby limits the application of this dc/dc boost converter of commonly using.
Summary of the invention
In view of this, the objective of the invention is above-mentioned shortcoming at prior art, a kind of bidirectional, dc/current/direct-current conversion device of tool neutral point is provided, but it is particularly to the DC/DC conversion device of energy bi-directional, when energy can be supplied two equal VD that the tool neutral point is connected in series by low pressure when the multiplication of voltage running is done in the high pressure transmission, when the step-down running is done in the low pressure transmission, can supply by high pressure when energy and fall half direct voltage of pressing.
Above-mentioned purpose of the present invention is realized by following technical scheme.
A kind of bidirectional, dc/current/direct-current conversion device of tool neutral point is characterized in that comprising:
One first direct voltage endpoint groups, it comprises an anode and a negative terminal;
One second direct voltage endpoint groups, it comprises an anode, a negative terminal and a neutral end;
One inductor is in order to be used as energy buffer;
One first electronic power switch, itself and this inductor is contacted the back cross-over connection in the anode and the negative terminal of this first direct voltage endpoint groups, and its conduction and cut-off of mat is controlled the energy storage of this inductor and released can;
One second electronic power switch, the one end is connected in the tie point of this inductor and first electronic power switch, and the other end then is connected in the anode of the second direct voltage endpoint groups, and its mat conduction and cut-off is controlled the energy storage of this inductor and released can;
One first diode, it is connected to first electronic power switch;
One second diode, it is connected to second electronic power switch;
One capacitor, its cross-over connection are between the anode of the anode of this first direct voltage endpoint groups and the second direct voltage endpoint groups, and it can in order to store releasing of this inductor; And
One controller, it is connected to the control end of this electronic power switch, with the conducting of controlling this electronic power switch and end;
This device can carry out the bidirectional energy transmission, when being passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, bidirectional, dc/the current/direct-current conversion device of this tool neutral point is as voltage-multiplying circuit, or when being passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups the bidirectional, dc/current/direct-current conversion device of this tool neutral point as half volt circuit.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, this first electronic power switch continues the control carrying out conducting and end, this second electronic power switch is then kept cut-off state always, make this inductor carry out energy storage from this input dc power potential source, maybe this energy storage is released into this capacitor through this second diode, so that set up a voltage that equates with this input dc power potential source voltage at this capacitor, the anode of this second direct voltage endpoint groups and the voltage between the negative terminal equal the voltage serial connection of the voltage and the capacitor of this input dc power potential source, so the anode of this second direct voltage endpoint groups and the twice that the voltage between the negative terminal equals this input dc power potential source voltage, because the voltage of this capacitor equates with the voltage of this input dc power potential source, so these pressure sides are considered as neutral point output, so it reaches the multiplication of voltage function of tool neutral point output when this energy delivery direction.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that; When energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, this second electronic power switch continues the action carrying out conducting and end, this first electronic power switch is then kept cut-off state always, at this moment, this first direct voltage endpoint groups can be supplied a half voltage that is equivalent to this second direct voltage endpoint groups, so it finishes half compression functions in this energy delivery direction.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: this controller comprises one first voltage detector, one second voltage detector, one first subtracter, one second subtracter, one first controller, one second controller, one first switch, a second switch, a pulse-width modulation circuit, one first drive circuit and one second drive circuit.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: this first voltage detector and second voltage detector detect the voltage of this first direct voltage endpoint groups and the voltage of this capacitor respectively.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: this control circuit comprises a high frequency triangle wave generator in addition, and it is in order to produce a high frequency triangle wave signal and to export this pulse-width modulation circuit to, and the high frequency triangle wave signal is as carrier signal.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: this device can be applicable to single-phase semi-bridge formula inverter, wherein anode, negative terminal and the neutral end of the second direct voltage endpoint groups of this device are connected to the dc terminal of this single-phase semi-bridge formula inverter, can supply two direct voltages of the same size and give this single-phase semi-bridge formula inverter to convert single-phase AC energy to when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups; When energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, can draw AC energy to being connected in the device charging of the first direct voltage endpoint groups by this single-phase semi-bridge formula inverter.
Bidirectional, dc/the current/direct-current conversion device of described tool neutral point; It is characterized in that: this device can be applicable to three-phase and four-line formula inverter, wherein anode, negative terminal and the neutral end of the second direct voltage endpoint groups of this device are connected to the dc terminal of this three-phase and four-line formula inverter, when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, supplies two direct voltages of the same size and give this three-phase and four-line formula inverter to convert the AC energy of three-phase and four-line to; When energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, draw AC energy to being connected in the device charging of the first direct voltage endpoint groups by this three-phase and four-line formula inverter.
The invention has the advantages that:
1, this device can carry out the bidirectional energy transmission, bidirectional, dc/the current/direct-current conversion device of this tool neutral point is as voltage-multiplying circuit when being passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, or when being passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups the bidirectional, dc/current/direct-current conversion device of this tool neutral point as half volt circuit.When energy was passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, an input dc power potential source was connected to this first direct voltage endpoint groups, and this second direct voltage endpoint groups is as output.At this moment, this first electronic power switch continues the action carrying out conducting and end, and this second electronic power switch then is failure to actuate and is kept cut-off state always.This device utilizes the conduction and cut-off action of this first electronic power switch of control, make this inductor carry out energy storage from the direct voltage source of this first direct voltage endpoint groups input, maybe this energy storage is released into this capacitor through this second diode, so that set up a voltage that equates with this input dc power potential source voltage at this capacitor.Because the voltage of the anode of this second direct voltage endpoint groups and voltage that the voltage between the negative terminal equals this input dc power potential source and capacitor serial connection addition, so the anode of this second direct voltage endpoint groups and the twice that the voltage between the negative terminal equals this input dc power potential source voltage, because the voltage of this capacitor equates with the voltage of this input dc power potential source, therefore this second direct voltage endpoint groups etc. the voltage of pressure side just equal half of voltage between the anode of this second direct voltage endpoint groups and negative terminal, so these pressure sides are considered as neutral point output, therefore it can finish the multiplication of voltage function of tool neutral point output in this energy delivery direction, and this capacitor withstand voltage only needs voltage between the anode of this second direct voltage endpoint groups and negative terminal half, therefore can reduce the voltage rating of this capacitor.
2, when energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, this second electronic power switch continues the action carrying out conducting and end, and this first electronic power switch then is failure to actuate and is kept cut-off state always.At this moment, this first direct voltage endpoint groups can be supplied a half voltage that is equivalent to this second direct voltage endpoint groups, so it can finish half compression functions in this energy delivery direction.
In order to allow above-mentioned and other purposes of the present invention, feature and advantage understand by clearer and more definite quilt, hereinafter will be especially exemplified by preferred embodiment of the present invention, and conjunction with figs., be described in detail below.
Description of drawings
Fig. 1: the circuit diagram of commonly using the DC/DC conversion circuit.
Fig. 2: the circuit diagram of the bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention.
Fig. 3: the calcspar of the control circuit of the bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention.
Fig. 4: the circuit diagram the when bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention is used in single-phase semi-bridge formula inverter applications.
Fig. 5: the circuit diagram the when bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention is used in three-phase and four-line formula inverter applications.
Embodiment
Fig. 2 discloses the circuit diagram of the bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention.Please refer to shown in Figure 2ly, the bidirectional, dc/current/direct-current conversion device 2 of preferred embodiment tool neutral point of the present invention has one first direct voltage endpoint groups 21 and one second direct voltage endpoint groups 22.This first direct voltage endpoint groups 21 comprises an anode 21a and a negative terminal 21b.This second direct voltage endpoint groups 22 comprises an anode 22c, a negative terminal 22b and a neutral end 22a.This DC/DC conversion device 2 comprises an inductor 30, one first electronic power switch 31, one second electronic power switch 32, one first diode 31a, one second diode 32a, a capacitor 33 and a controller 34.This inductor 30 is connected in series the back cross-over connection between the anode 21a and negative terminal 21b of this first direct voltage endpoint groups 21 with this first electronic power switch 31.32 cross-over connections of this second electronic power switch are in this inductor 30 and the tie point of this first electronic power switch 31 and the anode 22c of this second direct voltage endpoint groups 22.This first diode 31a and the second diode 32a are parallel to respectively on this first electronic power switch 31 and second electronic power switch 32.33 cross-over connections of this capacitor are between the anode 22c of the anode 21a of this first direct voltage endpoint groups 21 and the second direct voltage endpoint groups 22.The neutral end 22a of this second direct voltage endpoint groups 22 then is connected directly to the anode 21a of this first direct voltage endpoint groups 21, and the negative terminal 22b of this second direct voltage endpoint groups 22 then is connected directly to the negative terminal 21b of this first direct voltage endpoint groups 21.34 of this controllers are connected to the control end of this first electronic power switch 31 and second electronic power switch 32, to control its conducting or to end.
Referring again to shown in Figure 2, this DC/DC conversion device 2 can carry out the bidirectional energy transmission, be passed to this second direct voltage endpoint groups 22 by this first direct voltage endpoint groups 21, or be passed to this first direct voltage endpoint groups 21 by this second direct voltage endpoint groups 22.
When energy was passed to this second direct voltage endpoint groups 22 by this first direct voltage endpoint groups 21, an input dc power potential source inputed to this first direct voltage endpoint groups 21 and exports from this second direct voltage endpoint groups 22.At this moment, the control that this first electronic power switch 31 will carry out conducting and end, this second electronic power switch 32 then is failure to actuate and is kept cut-off state always.This device 2 utilizes the conduction and cut-off action of this first electronic power switch 31 of control, make this inductor 30 carry out energy storage from the input dc power potential source of these first direct voltage endpoint groups, 21 inputs, and this energy storage is released into this capacitor 33 through this second diode 32a so that this capacitor 33 set up one with the voltage of voltage such as input dc power potential source.Because the voltage of the anode 22c of this second direct voltage endpoint groups 22 and voltage that the voltage between the negative terminal 22b equals this input dc power potential source and capacitor 33 is connected in series and addition, so the anode 22c of this second direct voltage endpoint groups 22 and the twice that the voltage between the negative terminal 22b equals the voltage of this input dc power potential source, and because the voltage of this capacitor 33 equates with the voltage of input dc power potential source, therefore the voltage of the neutral end 22a of this second direct voltage endpoint groups 22 just equals the anode 22c of this second direct voltage endpoint groups 22 and the half voltage of negative terminal 22b, so this neutral end 22a is considered as the neutral point of the second direct voltage endpoint groups, so the bidirectional, dc/direct current transducer 2 of this tool neutral point can be finished the multiplication of voltage function of tool neutral point output in this energy delivery direction.Referring again to Figure 1 and Figure 2, with respect to the capacitor 16 of commonly using dc/dc boost converter 1, the capacitor 33 of the bidirectional, dc/current/direct-current conversion device 2 of tool neutral point of the present invention withstand voltage only needs half of these second direct voltage endpoint groups, 22 output voltages, therefore can reduce the voltage rating of this capacitor 33.
Referring again to shown in Figure 2, when energy is passed to this first direct voltage endpoint groups 21 by this second direct voltage endpoint groups 22, the DC input voitage source is connected between the anode 22c and negative terminal 22b of this second direct voltage endpoint groups 22, this second electronic power switch 32 will continue the control doing conducting and end this moment, and this first electronic power switch 31 is then kept always and ended.At this moment, this first direct voltage endpoint groups 21 can provide a half voltage that is equivalent to the second voltage endpoint groups 22, so the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point can be finished half compression functions in this energy delivery direction.
Fig. 3 discloses the calcspar of control circuit of the bidirectional, dc/current/direct-current conversion device of preferred embodiment tool neutral point of the present invention.
Please refer to shown in Figure 3ly, the controller 34 of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point comprises one first voltage detector 340a, one second voltage detector 340b, one first subtracter 341a, one second subtracter 341b, one first controller 343a, one second controller 343b, a high frequency triangle wave generator 344, one first switch 345a, a second switch 345b, a pulse-width modulation circuit 346, one first drive circuit 347a and one second drive circuit 347b.
Referring again to Fig. 2 and shown in Figure 3, this controller 34 detects the voltage of this first direct voltage endpoint groups 21 and the voltage of capacitor 33, it is in order to the conducting of controlling this first electronic power switch 31 and second electronic power switch 32 and end, therefore control the energy delivery direction of this device 2, promptly from this first direct voltage endpoint groups 21 be passed to this second direct voltage endpoint groups 22 or certainly this second direct voltage endpoint groups 22 be passed to this first direct voltage endpoint groups 21.
Referring again to Fig. 2 and shown in Figure 3, when energy was passed to this second direct voltage endpoint groups 22 by this first direct voltage endpoint groups 21, the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point had the multiplication of voltage function.At this moment, this first electronic power switch 31 continues the control carrying out conducting and end, and this second electronic power switch 32 then is failure to actuate and is kept cut-off state always, so this first switch 345a and second switch 345b all switch to position " A ".This first voltage detector 340a is in order to detect the voltage of this first direct voltage endpoint groups 21, i.e. input dc power potential source voltage, and it is as the reference signal of output voltage.This second voltage detector 340b is in order to detect the voltage of this capacitor 33.This first subtracter 341a is delivered in the output of this reference signal and this second voltage detector 340b, and both subtract each other and will subtract each other the result and export this first controller 343a to and compensate adjustment, to obtain one first control signal S1.
This high frequency triangle wave generator 344 is in order to producing the high frequency triangle wave signal, and exports this pulse-width modulation circuit 346 to as carrier signal.Because this first switch 345a places position " A ", therefore this first control signal S1 exports this pulse-width modulation circuit 346 to and carries out modulation and export a pulse-width modulation signal as modulating signal, because this second switch 345b places position " A ", the pulse-width modulation signal of these pulse-width modulation circuit 346 outputs exports this first drive circuit 347a again to and produces drive signal, export this first electronic power switch 31 to by this drive signal, with control conducting and cut-off state.
Referring again to Fig. 2 and shown in Figure 3, when these first electronic power switch, 31 conductings, this inductor 30 carries out energy storage; When this first electronic power switch 31 by the time, the energy storage of this inductor 30 through this second diode 32a to these capacitor 33 chargings setting up a voltage, and the voltage on the control capacitor 33 equates with voltage on the first direct voltage endpoint groups 21.Because these capacitor 33 cross-over connections are between the anode 22c of the anode 21a of this first direct voltage endpoint groups 21 and the second direct voltage endpoint groups 22, therefore the anode 22c of this second direct voltage endpoint groups 22 and the total voltage between the negative terminal 22b are the voltage that this input dc power potential source voltage adds this capacitor 33, and this total voltage is that the twice of input dc power potential source voltage forms a voltage-multiplying circuit.Simultaneously, because the anode 21a of this first direct voltage endpoint groups 21 is connected directly to the neutral end 22a of this second direct voltage endpoint groups 22, so the neutral end 22a of this second direct voltage endpoint groups 22 is divided into two equal-sized direct voltages with the anode 22c of this second direct voltage endpoint groups 22 and the voltage of negative terminal 22b.Therefore, the bidirectional, dc/current/direct-current conversion device 2 of tool neutral point of the present invention can obtain multiplication of voltage output at energy when this first direct voltage endpoint groups 21 is passed to this second direct voltage endpoint groups 22, and has neutral point output.Bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point is applicable to the various electronic installations that need neutral point output.
Referring again to Fig. 2 and shown in Figure 3, when energy was passed to this first direct voltage endpoint groups 21 by this second direct voltage endpoint groups 22, this DC/DC conversion device 2 had half compression functions.At this moment, this second electronic power switch 32 will continue the control carrying out conducting and end, and this first electronic power switch 31 then is failure to actuate and is kept cut-off state always, so this first switch 345a and second switch 345b all switch to position " B ".This first voltage detector 340a is in order to detect the voltage of this first direct voltage endpoint groups 21, this second voltage detector 340b is in order to detect the voltage of this capacitor 33, the output of this first voltage detector 340a and this second voltage detector 340b is delivered to this second subtracter 341b and is subtracted each other, to subtract each other the result again and export this second controller 343b to and compensate adjustment, to obtain one second control signal S2.This high frequency triangle wave generator 344 is in order to producing the high frequency triangle wave signal, and exports this pulse-width modulation circuit 346 to as carrier signal.Because this first switch 345a places position " B ", so this second control signal S2 exports this pulse-width modulation circuit 346 to and carries out modulation and the output pulse width modulating signal as modulating signal; Because this second switch 345b places position " B ", the modulating signal of the output of this pulse-width modulation circuit 346 exports this second drive circuit 347b to and produces drive signal, export this second electronic power switch 32 to by this drive signal, to control this 32 conductings of second electronic power switch and cut-off state.
Referring again to Fig. 2 and shown in Figure 3, by these second electronic power switch, 32 conductings and end, and this first electronic power switch 31 is kept cut-off state always, therefore will produce a high frequency square wave voltage at these first electronic power switch, 31 two ends, its amplitude is the voltage of the input dc power potential source that connect between the anode 22c of this second direct voltage endpoint groups 22 and the negative terminal 22b, all can add a capacitor or storage battery according to different application in this first direct current pressure side group 21, therefore this high frequency square wave voltage is again after these inductor 30 filtering, can produce a stable DC voltage in this first direct voltage endpoint groups 21, this voltage swing is equivalent to half of this input dc power potential source voltage.Therefore, the bidirectional, dc/current/direct-current conversion device 2 of tool neutral point of the present invention has half compression functions at energy when this second direct voltage endpoint groups 22 is passed to this first direct voltage endpoint groups 21.
Circuit diagram when bidirectional, dc/current/direct-current conversion device that Fig. 4 discloses preferred embodiment tool neutral point of the present invention is used in single-phase semi-bridge formula inverter applications.
Please refer to shown in Figure 4ly, this single-phase semi-bridge formula inverter 4 comprises a first arm and one second arm.This first arm is made up of a pair of electronic power switch 40a and 40b, and second arm then is made up of a pair of capacitor 41a and 41b.The output of this single-phase semi-bridge formula inverter 4 comprises a low pass filter in addition, and it is made up of an inductor 42 and a capacitor 43.This single-phase semi-bridge formula inverter 4 is by the conducting of control this electronic power switch 40a and 40b and end, and a direct current voltage transitions is become a high frequency voltage, again through this inductor 42 and a capacitor 43 filtering to supply with AC sine wave voltage to an AC load.At this moment, the capacitor 41a of this single-phase semi-bridge formula inverter 4 and the voltage of 41b must equate, if the unequal normal running that will influence this single-phase semi-bridge formula inverter 4 of voltage of this capacitor 41a and 41b.In practical application,, may cause the Voltage unbalance of this capacitor 41a and 41b owing to the transient state of the asymmetric of this AC load or 4 operations of this single-phase semi-bridge formula inverter.In order to keep the voltage swing unanimity of this capacitor 41a and 41b, this single-phase semi-bridge formula inverter 4 must be provided with a balancing circuitry in addition in order to keep all pressures of this capacitor 41a and 41b, because the anode 22c of the second direct voltage endpoint groups 22 of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point, negative terminal 22b and neutral end 22a can supply two direct voltages of the same size, therefore can be supplied to this single-phase semi-bridge formula inverter 4 by the second direct voltage endpoint groups, 22 outputs of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point, make the balance of voltage of this capacitor 41a and 41b, can save the voltage balancing circuit of establishing in addition.
Referring again to Fig. 3 and shown in Figure 4, when the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point should be used for supplying direct current to single-phase semi-bridge formula inverter 4, this first direct voltage endpoint groups 21 was connected to an input dc power potential source, as storage battery.Anode 22c, the negative terminal 22b of the second direct voltage endpoint groups 22 of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point and neutral end 22a are connected to the capacitor 41a and the 41b of this single-phase semi-bridge formula inverter 4.The operating technology content of this DC/DC conversion device 2 of Fig. 4 has been disclosed in the above stated specification content, incorporates reference in this, will not give unnecessary details in detail.The capacitor 33 of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point can be merged into a single capacitor with the capacitor 41a of this single-phase semi-bridge formula inverter 4 when practical application.
When energy was passed to this second direct voltage endpoint groups 22 by this first direct voltage endpoint groups 21 of the bidirectional, dc/flow directing device of this tool neutral point, this first electronic power switch 31 continues to carry out conducting and this second electronic power switch 32 of action of ending then is failure to actuate kept cut-off state always.At this moment, bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point utilizes the conduction and cut-off action of this first electronic power switch 31 of control, make this inductor 30 carry out energy storage from the input dc power potential source of these first direct voltage endpoint groups, 21 inputs, and this energy storage is released into this capacitor 33 through this second diode 32a so that this capacitor 33 set up one with the voltage of voltage such as input dc power potential source.Because the voltage of the anode 22c of this second direct voltage endpoint groups 22 and voltage that the voltage between the negative terminal 22b equals this input dc power potential source and capacitor 33 is connected in series and addition, so the anode 22c of this second direct voltage endpoint groups 22 and the twice that the voltage between the negative terminal 22b equals the voltage of this input dc power potential source, and because the voltage of this capacitor 33 equates with the voltage of input dc power potential source, therefore the voltage of the neutral end 22a of this second direct voltage endpoint groups 22 is divided into this output voltage two equirotal direct voltages just, therefore bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point can be supplied two direct voltages of the same size to this single-phase semi-bridge formula inverter 4, so that can this single-phase semi-bridge formula inverter 4 of normal running.
Bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point has energy bi-directional function.When the output of this single-phase semi-bridge formula inverter 4 connects an AC power, convert alternating voltage to direct voltage, and input to the second direct voltage endpoint groups 22 of this DC/DC conversion device 2, form energy and be passed to this first direct voltage endpoint groups 21 by this second direct voltage endpoint groups 22.At this moment, this second electronic power switch 32 continues the action carrying out conducting and end, and this first electronic power switch 31 then is failure to actuate and is kept cut-off state always.A half voltage to the storage battery that these first direct voltage endpoint groups, 21 supplies are equivalent to this second direct voltage endpoint groups 22 charges, and so can save and additionally put a battery charger.
Circuit diagram when bidirectional, dc/current/direct-current conversion device that Fig. 5 discloses preferred embodiment tool neutral point of the present invention is used in three-phase and four-line formula inverter applications.
Please refer to shown in Figure 5ly, this three-phase four-line dc-to-ac converter 5 comprises a three phase full bridge formula electric power converter 50 in order to supply three-phase and four-line output.This three-phase four-line dc-to-ac converter 5 comprises pair of series capacitor 51a and 51b in addition, and it forms the neutral output of one the 4th pin supply.This three-phase four-line dc-to-ac converter 5 comprises a low pass filter 52 in addition as filtering high-frequency harmonic usefulness, the alternating voltage of these three-phase four-line dc-to-ac converter 5 exportable three-phase and four-lines.
Referring again to Fig. 3 and shown in Figure 5, the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point should be used for supplying DC quantity can give this three-phase four-line dc-to-ac converter 5 time, and this first direct voltage endpoint groups 21 is connected to an input dc power potential source, as storage battery.Capacitor 51a and 51b that anode 22c, the negative terminal 22b of the second direct voltage endpoint groups 22 of the bidirectional, dc/current/direct-current conversion device 2 of this tool neutral point and neutral end 22a are connected to this this three-phase four-line dc-to-ac converter 5.The operating technology content of the DC/DC conversion device 2 of this tool neutral point of Fig. 3 has been disclosed in the above stated specification content, incorporates reference in this, will not give unnecessary details in detail.For these three-phase four-line dc-to-ac converter 5 operations are normal, the second direct voltage endpoint groups 22 of this DC/DC conversion device 2 is supplied to the voltage swing unanimity of this capacitor 51a and 51b.The capacitor 33 of this DC/DC conversion device 2 can be merged into a single capacitor with the capacitor 51a of this three-phase four-line dc-to-ac converter 5 when practical application.
When energy is passed to this second direct voltage endpoint groups 22 by this first direct voltage endpoint groups 21 of the bidirectional, dc/flow directing device of this tool neutral point, this first electronic power switch 31 continues the action carrying out conducting and end, and this second electronic power switch 32 then is failure to actuate and is kept cut-off state always.At this moment, bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point utilizes the conduction and cut-off action of this first electronic power switch 31 of control, make this inductor 30 carry out energy storage from the input dc power potential source of these first direct voltage endpoint groups, 21 inputs, and this energy storage is released into this capacitor 33 through this second diode 32a so that this capacitor 33 set up one with the voltage of voltage such as input dc power potential source.Because the voltage of the anode 22c of this second direct voltage endpoint groups 22 and voltage that the voltage between the negative terminal 22b equals this input dc power potential source and capacitor 33 is connected in series and addition, therefore the anode 22c of this direct voltage endpoint groups 22 of the and the twice that the voltage between the negative terminal 22b equals the voltage of this input dc power potential source, and owing to the voltage of this capacitor 33 equates with the voltage of input dc power potential source, therefore the voltage of the neutral end 22a of this second direct voltage endpoint groups 22 is divided into this output voltage two equirotal direct voltages just, therefore bidirectional, dc/the current/direct-current conversion device 2 of this tool neutral point can be supplied two direct voltages of the same size to this three-phase four-line dc-to-ac converter 5, so that can this three-phase four-line dc-to-ac converter 5 of normal running.
The DC/DC conversion device 2 of this tool neutral point has energy bi-directional function.When the output of this three-phase four-line dc-to-ac converter 5 connects an AC power, convert alternating voltage to direct voltage, and input to the second direct voltage endpoint groups 22 of this DC/DC conversion device 2, form energy and be passed to this first direct voltage endpoint groups 21 by this second direct voltage endpoint groups 22.At this moment, this second electronic power switch 32 continues the action carrying out conducting and end, and this first electronic power switch 31 then is failure to actuate and is kept cut-off state always.A half voltage to the storage battery that these first direct voltage endpoint groups, 21 supplies are equivalent to this second direct voltage endpoint groups 22 charges, and so a battery charger is additionally put in saving.
The present invention can not depart under main spirit and the feature with other different forms enforcement.Therefore, above-mentioned preferred embodiment is just enumerated by way of example, it should be considered as restriction of the present invention.Scope of the present invention is defined by the claim scope, but not is defined by the content of specification.Person very, the variation or revise that belongs to the equivalence of claim scope all falls within the scope of this invention.
Claims (8)
1, a kind of bidirectional, dc/current/direct-current conversion device of tool neutral point is characterized in that comprising:
One first direct voltage endpoint groups, it comprises an anode and a negative terminal;
One second direct voltage endpoint groups, it comprises an anode, a negative terminal and a neutral end;
One inductor is in order to be used as energy buffer;
One first electronic power switch, itself and this inductor is contacted the back cross-over connection in the anode and the negative terminal of this first direct voltage endpoint groups, and its conduction and cut-off of mat is controlled the energy storage of this inductor and released can;
One second electronic power switch, the one end is connected in the tie point of this inductor and first electronic power switch, and the other end then is connected in the anode of the second direct voltage endpoint groups, and its mat conduction and cut-off is controlled the energy storage of this inductor and released can;
One first diode, it is connected to first electronic power switch;
One second diode, it is connected to second electronic power switch;
One capacitor, its cross-over connection are between the anode of the anode of this first direct voltage endpoint groups and the second direct voltage endpoint groups, and it can in order to store releasing of this inductor; And
One controller, it is connected to the control end of this electronic power switch, with the conducting of controlling this electronic power switch and end;
This device can carry out the bidirectional energy transmission, when being passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, bidirectional, dc/the current/direct-current conversion device of this tool neutral point is as voltage-multiplying circuit, or when being passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups the bidirectional, dc/current/direct-current conversion device of this tool neutral point as half volt circuit.
2, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 1; It is characterized in that: when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, this first electronic power switch continues the control carrying out conducting and end, this second electronic power switch is then kept cut-off state always, make this inductor carry out energy storage from this input dc power potential source, maybe this energy storage is released into this capacitor through this second diode, so that set up a voltage that equates with this input dc power potential source voltage at this capacitor, the anode of this second direct voltage endpoint groups and the voltage between the negative terminal equal the voltage serial connection of the voltage and the capacitor of this input dc power potential source, so the anode of this second direct voltage endpoint groups and the twice that the voltage between the negative terminal equals this input dc power potential source voltage, because the voltage of this capacitor equates with the voltage of this input dc power potential source, so these pressure sides are considered as neutral point output, so it reaches the multiplication of voltage function of tool neutral point output when this energy delivery direction.
3, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 1; It is characterized in that: when energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, this second electronic power switch continues the action carrying out conducting and end, this first electronic power switch is then kept cut-off state always, at this moment, this first direct voltage endpoint groups can be supplied a half voltage that is equivalent to this second direct voltage endpoint groups, so it finishes half compression functions in this energy delivery direction.
4, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 1; It is characterized in that: this controller comprises one first voltage detector, one second voltage detector, one first subtracter, one second subtracter, one first controller, one second controller, one first switch, a second switch, a pulse-width modulation circuit, one first drive circuit and one second drive circuit.
5, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 3; It is characterized in that: this first voltage detector and second voltage detector detect the voltage of this first direct voltage endpoint groups and the voltage of this capacitor respectively.
6, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 3; It is characterized in that: this control circuit comprises a high frequency triangle wave generator in addition, and it is in order to produce a high frequency triangle wave signal and to export this pulse-width modulation circuit to, and the high frequency triangle wave signal is as carrier signal.
7, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 1; It is characterized in that: this device can be applicable to single-phase semi-bridge formula inverter, wherein anode, negative terminal and the neutral end of the second direct voltage endpoint groups of this device are connected to the dc terminal of this single-phase semi-bridge formula inverter, can supply two direct voltages of the same size and give this single-phase semi-bridge formula inverter to convert single-phase AC energy to when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups; When energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, can draw AC energy to being connected in the device charging of the first direct voltage endpoint groups by this single-phase semi-bridge formula inverter.
8, the bidirectional, dc/current/direct-current conversion device of tool neutral point according to claim 1; It is characterized in that: this device can be applicable to three-phase and four-line formula inverter, wherein anode, negative terminal and the neutral end of the second direct voltage endpoint groups of this device are connected to the dc terminal of this three-phase and four-line formula inverter, when energy is passed to this second direct voltage endpoint groups by this first direct voltage endpoint groups, supplies two direct voltages of the same size and give this three-phase and four-line formula inverter to convert the AC energy of three-phase and four-line to; When energy is passed to this first direct voltage endpoint groups by this second direct voltage endpoint groups, draw AC energy to being connected in the device charging of the first direct voltage endpoint groups by this three-phase and four-line formula inverter.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101194025A CN100376075C (en) | 2003-12-04 | 2003-12-04 | Bidirection DC/DC converter with neutral point |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101194025A CN100376075C (en) | 2003-12-04 | 2003-12-04 | Bidirection DC/DC converter with neutral point |
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| CN1625033A true CN1625033A (en) | 2005-06-08 |
| CN100376075C CN100376075C (en) | 2008-03-19 |
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| CNB2003101194025A Expired - Fee Related CN100376075C (en) | 2003-12-04 | 2003-12-04 | Bidirection DC/DC converter with neutral point |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375366C (en) * | 2005-07-08 | 2008-03-12 | 珠海金电电源工业有限公司 | Charge-discharge system and charge-discharge method |
| CN101728945B (en) * | 2008-10-17 | 2012-09-05 | 盈正豫顺电子股份有限公司 | Bi-directional direct-current/direct-current voltage conversion device with neutral point |
| CN103066588A (en) * | 2011-10-18 | 2013-04-24 | 积能环保电机工程科技有限公司 | Direct current distribution circuit |
| CN103731573A (en) * | 2013-12-31 | 2014-04-16 | 华为终端有限公司 | Power supply circuit and telephone system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5493486A (en) * | 1995-03-17 | 1996-02-20 | Motorola, Inc. | High efficiency compact low power voltage doubler circuit |
| JP2001078458A (en) * | 1999-09-03 | 2001-03-23 | Kyosan Electric Mfg Co Ltd | Single phase rectifier |
-
2003
- 2003-12-04 CN CNB2003101194025A patent/CN100376075C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375366C (en) * | 2005-07-08 | 2008-03-12 | 珠海金电电源工业有限公司 | Charge-discharge system and charge-discharge method |
| CN101728945B (en) * | 2008-10-17 | 2012-09-05 | 盈正豫顺电子股份有限公司 | Bi-directional direct-current/direct-current voltage conversion device with neutral point |
| CN103066588A (en) * | 2011-10-18 | 2013-04-24 | 积能环保电机工程科技有限公司 | Direct current distribution circuit |
| CN103066588B (en) * | 2011-10-18 | 2015-03-25 | 积能环保电机工程科技有限公司 | Direct current distribution circuit |
| CN103731573A (en) * | 2013-12-31 | 2014-04-16 | 华为终端有限公司 | Power supply circuit and telephone system |
| WO2015101299A1 (en) * | 2013-12-31 | 2015-07-09 | 华为终端有限公司 | Power supply circuit and telephone system |
| CN103731573B (en) * | 2013-12-31 | 2015-11-25 | 华为终端有限公司 | A kind of power supply circuits and telephone system |
| CN105282350A (en) * | 2013-12-31 | 2016-01-27 | 华为终端有限公司 | Power supply circuit and telephone system |
| CN105282350B (en) * | 2013-12-31 | 2019-05-07 | 华为终端有限公司 | A kind of power supply circuit and telephone system |
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| Publication number | Publication date |
|---|---|
| CN100376075C (en) | 2008-03-19 |
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