CN209016943U - Control circuit suitable for two-way DC converter - Google Patents

Abstract

The utility model provides a kind of control circuit suitable for two-way DC converter.Two-way DC converter is applied to Vehicular power system, receives input voltage, and exports output voltage and output electric current.Control circuit includes adjustment module, oscillator, phase-shift controller, primary side driving circuit and secondary side driving circuit.Adjustment module is according to output voltage, reference voltage, output electric current and reference current output regulation signal.Oscillator receives adjustment signal, exports switching frequency and first control signal.Phase-shift controller receives switching frequency, obtains phase shifting angle according to input voltage and output voltage, exports second control signal according to switching frequency and phase shifting angle.Primary side driving circuit, secondary side driving circuit are connected to primary circuit, secondary circuit, the primary circuit and secondary circuit according to control signal driving two-way DC converter.The control circuit of the disclosure can satisfy the demand of wide-range voltage gain, and switching loss and lifting system efficiency is effectively reduced.

Description

Control circuit suitable for two-way DC converter

Technical field

The utility model relates to a kind of control circuit, in particular to a kind of control electricity suitable for two-way DC converter Road.

Background technique

Vehicular charger is that electric car must traditionally be based on single charge function to be defined with original part. With being continuously increased for the sustainable development of micro-capacitance sensor technology, the diversification of demand of user experience and on-vehicle battery capacity, has and put The charger of Electricity Functional gradually attracts attention.To realize Bidirectional charging-discharging function, Fig. 1, Fig. 2 or circuit shown in Fig. 3 can be used Structure.Circuit structure as shown in Figure 1, be on the basis of original isolated form charger, additionally increase an isolated form and Inverter with discharging function, however its volume is larger, higher cost.Circuit structure as shown in Figure 2, be using it is non-every Release two-way AC/DC converter, structure is simple, small volume, and the right quarantine measures because lacking rear class are easy electric leakage and jeopardize Personal safety.Circuit structure as shown in Figure 3 is two-way AC/DC converter and the isolation of the non-isolation type using being connected The two-way DC/DC converter of type adjusts output voltage using two-way DC/DC converter, and meets the need of energy in bidirectional flow It asks, and while realizing two-way isolation, volume and cost are ideal.

It follows that two-way DC/DC converter is the important link for developing two-way Vehicular charger.The prior art it is two-way DC/DC converter mostly uses DAB (Dual Active Bridge, double active bridges) circuit or CLLC type circuit.DAB circuit is logical It crosses and phase shift is carried out to control the gain of output voltage to former and deputy side driving signal, however its soft-switching range is limited, increases in majority Switching loss under the conditions of benefit is larger, and efficiency is poor.CLLC type circuit is to be designed for resonance circuit, and take frequency modulation control System, when controlling converter and being charged, efficiency is good, however when control converter is discharged, the idle ingredient of resonance current More, the conduction loss of switch increases, so that efficiency is lower.

Therefore, how to develop a kind of control circuit suitable for two-way DC converter that can improve the above-mentioned prior art, Actually demand urgent at present.

Utility model content

The disclosure is designed to provide a kind of control circuit suitable for two-way DC converter, adjustment module foundation Output voltage, reference voltage, output electric current and reference current generate adjustment signal, through one control signal of oscillator output, phase shift Controller generates another control signal according to corresponding switching frequency and input and output voltage, makes driving circuit according to control signal The switching tube of the former and deputy side circuit of two-way DC converter is controlled.Therefore, the control circuit of the disclosure is to utilize frequency modulation And/or phase shift controls two-way DC converter, can satisfy the demand of wide-range voltage gain, and because it is with resonance Element is able to achieve Sofe Switch, and switching loss and lifting system efficiency is effectively reduced.

In order to achieve the above object, the disclosure provides a kind of control circuit suitable for two-way DC converter.Bidirectional, dc becomes Parallel operation is applied to Vehicular power system, and can switch ground work in charge mode or discharge mode.Two-way DC converter receives Input voltage, and export output voltage and output electric current.Two-way DC converter includes primary side end, primary circuit, resonant cavity, pair Side circuit and secondary side end.Resonant cavity includes transformer.Primary circuit is electrically connected between primary side end and the primary side of resonant cavity, secondary Side circuit is electrically connected between secondary side end and the primary side of resonant cavity.Control circuit includes adjustment module, oscillator, phase shifting control Device, primary side driving circuit and secondary side driving circuit.Adjustment module is according to output voltage, reference voltage, output electric current and reference electricity Flow output regulation signal.Oscillator is connected to adjustment module, and to receive and export switching frequency according to adjustment signal, and foundation is opened Close rate-adaptive pacemaker first control signal.Phase-shift controller is connected to oscillator, to receive switching frequency, and according to input voltage and Output voltage obtains phase shifting angle, and exports second control signal according to switching frequency and phase shifting angle.Primary side driving circuit is connected to Primary circuit, wherein primary side driving circuit receives and according to oscillator institute when two-way DC converter work is in charge mode The first control signal of output exports primary side driving signal to primary circuit, when two-way DC converter works in discharge mode When, primary side driving circuit receives and the second control signal exported according to phase-shift controller exports primary side driving signal to primary side Circuit, to drive the running of primary circuit.Secondary side driving circuit is connected to secondary circuit, wherein when two-way DC converter works It is secondary to be driven when driving circuit receives and the second control signal exported according to phase-shift controller exports secondary in charge mode Signal is to secondary circuit, and when two-way DC converter work is in discharge mode, secondary side driving circuit receives and according to oscillator The first control signal exported exports secondary side driving signal to secondary circuit, to drive the running of secondary circuit.

Further, when two-way DC converter work is in charge mode, it is defeated which exports this Out voltage and this output current to an on-vehicle battery, when the two-way DC converter work in discharge mode, the bidirectional, dc Converter receives the input voltage from the on-vehicle battery.

Further, which includes a first arithmetic device interconnected and a Voltage loop adjuster, this first Arithmetic unit is according to the difference between the output voltage and the reference voltage output output voltage and the reference voltage to the Voltage loop Adjuster, the Voltage loop adjuster export a Voltage loop adjustment signal according to the difference between the output voltage and the reference voltage.

Further, which also includes a comparator, a second arithmetic device and an electric current loop adjuster, this compares Device is connected to the Voltage loop adjuster and the second arithmetic device, which is connected to the second arithmetic device and the oscillation Device, wherein the comparator receives and compares the Voltage loop adjustment signal and the reference current, and according to one letter of comparison result output Number to the second arithmetic device, which exports between the signal and the output electric current according to the signal and the output electric current Difference to the electric current loop adjuster, electric current loop adjuster exports adjusting letter according to the difference between the signal and the output electric current Number to the oscillator.

Further, the signal of comparator output is the Voltage loop adjustment signal or the reference current.

Further, which also includes a second arithmetic device, an electric current loop adjuster and a comparator, this second Arithmetic unit is connected to the electric current loop adjuster, which is connected to the electric current loop adjuster, the Voltage loop adjuster and the vibration Device is swung, wherein the second arithmetic device exports between the output electric current and the reference current according to the output electric current and the reference current Difference is to the electric current loop adjuster, and the electric current loop adjuster is according to one electricity of difference output between the output electric current and the reference current Ring adjustment signal is flowed, which receives and compare the Voltage loop adjustment signal and the electric current loop adjustment signal, and foundation compares As a result the adjustment signal is exported to the oscillator.

Further, the adjustment signal of comparator output is that the Voltage loop adjustment signal or the electric current loop adjust letter Number.

Further, the primary circuit of the two-way DC converter includes one first bridge arm that is connected in parallel with each other and one the Two bridge arms, first bridge arm include the first switch tube and a second switch being connected in series with each other, which includes The third switching tube and one the 4th switching tube being connected in series with each other, wherein have between the first switch tube and the second switch There is a first node, which is electrically connected to one end of the primary side, between the third switching tube and the 4th switching tube With a second node, which is electrically connected to the other end of the primary side, the secondary circuit of the two-way DC converter Comprising the third bridge arm being connected in parallel with each other and a four bridge legs, which includes that one the 5th be connected in series with each other opens Pipe and one the 6th switching tube are closed, which includes one the 7th switching tube and one the 8th switching tube being connected in series with each other, In there is a third node between the 5th switching tube and the 6th switching tube, which is electrically connected to the one of the primary side End, has a fourth node between the 7th switching tube and the 8th switching tube, which is electrically connected to the primary side The other end.

Further, there is a primary side current in the primary side of the resonant cavity, have in the primary side of the resonant cavity Once grade side electric current, the control circuit also include a node voltage detection unit, and the node voltage detection unit framework is in inspection Voltage and the offer of the voltage of the first node, the voltage of the second node, the voltage of the third node and the fourth node are provided Give the phase-shift controller, when two-way DC converter work is in charge mode, and the voltage of the third node detected or When the voltage of the fourth node is in failing edge, the primary side current and the secondary side current are zero, when the bidirectional, dc converts Device works in discharge mode, and when the voltage of the voltage of the first node detected or the second node be in failing edge, this Primary side current and the secondary side current are zero.

Further, there is a primary side current in the primary side of the resonant cavity, have in the primary side of the resonant cavity Once grade side electric current, the control circuit also include a resonant cavity detection unit, which should in detection Primary side current and the secondary side current are simultaneously supplied to the phase-shift controller.

Further, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in charge mode When, the control circuit turn-on instant of the first switch tube He the second switch postponed into the phase shifting angle with obtain respectively this The turn-on instant of six switching tubes and the 8th switching tube, the shutdown moment of the driving signal of the 5th switching tube in the 6th switching tube Conducting a period of time or off state is maintained between at the time of to the primary side current being zero, the driving letter of the 7th switching tube Conducting a period of time or pass is maintained between number at the time of shutdown moment to primary side current of the 8th switching tube is zero Disconnected state, when the output voltage gain of the two-way DC converter is more than or equal to one and work is in discharge mode, the control The turn-on instant of 7th switching tube and the 8th switching tube is postponed the phase shifting angle to obtain the second switch respectively by circuit With the turn-on instant of the 4th switching tube, the driving signal of the first switch tube the second switch the shutdown moment to the secondary Conducting a period of time or maintain off state between at the time of side electric current is zero, the driving signal of the third switching tube this A period of time is connected between at the time of the shutdown moment of four switching tubes to the secondary side current is zero or maintains off state.

Further, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in charge mode When, the control circuit turn-on instant of the first switch tube He the second switch postponed into the phase shifting angle with obtain respectively this The turn-on instant of seven switching tubes and the 5th switching tube, the shutdown moment of the driving signal of the 6th switching tube in the 5th switching tube Conducting a period of time or off state is maintained between at the time of to the primary side current being zero, the driving letter of the 8th switching tube Conducting a period of time or pass is maintained between number at the time of shutdown moment to primary side current of the 7th switching tube is zero Disconnected state, when the output voltage gain of the two-way DC converter is more than or equal to one and work is in discharge mode, the control The turn-on instant of 7th switching tube and the 8th switching tube is postponed the phase shifting angle to obtain the first switch tube respectively by circuit With the turn-on instant of third switching tube, the driving signal of the 4th switching tube the third switching tube the shutdown moment to the secondary Conducting a period of time or maintain off state between at the time of side electric current is zero, the driving signal of the second switch this A period of time is connected between at the time of the shutdown moment of one switching tube to the secondary side current is zero or maintains off state.

Further, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in charge mode When, when which postpones conducting of the phase shifting angle to obtain the 5th switching tube for the turn-on instant of the second switch It carves, the driving signal of the 6th switching tube is complementary with the driving signal of the 5th switching tube, the driving signal of the 7th switching tube A period of time is connected between at the time of shutdown moment to primary side current of the 5th switching tube is zero or maintains shutdown State, the driving signal of the 8th switching tube at the time of shutdown moment to primary side current of the 6th switching tube is zero it Between conducting a period of time or maintain off state, when the output voltage gain of the two-way DC converter be greater than or equal to one and In discharge mode, which postpones the phase shifting angle for the turn-on instant of the 8th switching tube and is opened with obtaining the third for work The turn-on instant of pipe is closed, the driving signal of the 4th switching tube is complementary with the driving signal of the third switching tube, the first switch The driving signal of pipe at the time of shutdown moment to secondary side current of the third switching tube is zero between be connected a period of time Or maintain off state, the driving signal of the second switch the 4th switching tube the shutdown moment to the secondary side current A period of time is connected between at the time of being zero or maintains off state.

Further, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in charge mode When, when which postpones conducting of the phase shifting angle to obtain the 7th switching tube for the turn-on instant of the first switch tube It carves, the driving signal of the 8th switching tube is complementary with the driving signal of the 7th switching tube, the driving signal of the 5th switching tube A period of time is connected between at the time of shutdown moment to primary side current of the 7th switching tube is zero or maintains shutdown State, the driving signal of the 6th switching tube at the time of shutdown moment to primary side current of the 8th switching tube is zero it Between conducting a period of time or maintain off state, when the output voltage gain of the two-way DC converter be greater than or equal to one and In discharge mode, which by the turn-on instant of the 7th switching tube postpones the phase shifting angle to obtain this and first open for work The turn-on instant of pipe is closed, the driving signal of the second switch and the driving signal of the first switch tube are complementary, third switch The driving signal of pipe at the time of shutdown moment to secondary side current of the first switch tube is zero between be connected a period of time Or maintain off state, the driving signal of the 4th switching tube the second switch the shutdown moment to the secondary side current A period of time is connected between at the time of being zero or maintains off state.

Further, when two-way DC converter work is in charge mode, the driving signal of the 5th switching tube exists The voltage of the third node is in conducting a period of time in the time of high level, and the driving signal of the 6th switching tube is in the third The voltage of node is in conducting a period of time in the low level time, and the driving signal of the 7th switching tube is in the fourth node Voltage is in conducting a period of time in the time of high level, and the driving signal of the 8th switching tube is at the voltage of the fourth node In in the low level time be connected a period of time, when the two-way DC converter work in discharge mode, the first switch tube Driving signal be connected within the time that the voltage of the first node is in high level a period of time, the driving of the second switch Signal is in the low level time in the voltage of the first node and a period of time is connected, and the driving signal of the third switching tube exists The voltage of the second node is in conducting a period of time in time of high level, the driving signal of the 4th switching tube this second The voltage of node is in conducting a period of time in the low level time.

Further, which also includes that an input voltage measurement unit, an output voltage detection unit and one are defeated Current detecting unit out, the input voltage measurement unit structure, should in detecting the input voltage and being supplied to the phase-shift controller For output voltage detection unit framework in detecting the output voltage and being supplied to the adjustment module and the phase-shift controller, the output is electric Stream detection unit framework is in the detection output electric current and is supplied to the adjustment module.

Further, the resonant cavity of the two-way DC converter includes a resonant inductance.

Further, the primary side of the resonant cavity includes a primary side inductance, and the primary side of the resonant cavity includes one Secondary inductor, the primary side inductance and the secondary inductor are equivalent to a resonant inductance.

Further, the resonant cavity of the two-way DC converter includes a resonant capacitance.

Further, the primary side of the resonant cavity includes a primary lateral capacitance, and the primary side of the resonant cavity includes one Secondary lateral capacitance, the primary lateral capacitance and the primary side capacitor equivalent are in a resonant capacitance.

Further, the resonant cavity of the two-way DC converter has a resonance frequency, and it is humorous which is greater than this Vibration frequency.

Further, which is a voltage controlled oscillator.

Detailed description of the invention

Fig. 1, Fig. 2 and Fig. 3 are the electrical block diagram of existing charger.

Fig. 4 and Fig. 5 be disclosure preferred embodiment two-way DC converter and control circuit electrical block diagram, Wherein the two-way DC converter of Fig. 4 works in charge mode, and the two-way DC converter of Fig. 5 works in discharge mode.

Fig. 6 is the electrical block diagram of the two-way DC converter of Fig. 4 and another embodiment of control circuit.

Fig. 7 is the two-way DC converter for showing Fig. 4 and Fig. 5 and phase shifting angle, switching frequency and output in control circuit The schematic diagram of relationship between voltage.

The two-way DC converter that Fig. 8 is Fig. 4 is less than switching sequence figure for the moment in output voltage gain.

The two-way DC converter that Fig. 9 A, Fig. 9 B and Fig. 9 C are Fig. 4 is greater than or equal in output voltage gain to be opened for the moment Close timing diagram.

The two-way DC converter that Figure 10 is Fig. 5 is greater than or equal to switching sequence figure for the moment in output voltage gain.

Figure 11 A, Figure 11 B, Figure 11 C, Figure 11 D, Figure 11 E, Figure 11 F, Figure 11 G and Figure 11 H be Fig. 4 resonant cavity it is a variety of The electrical block diagram of embodiment.

Figure 12 is the equivalent circuit structure schematic diagram of the resonant cavity of Fig. 4.

Symbol description

1: two-way DC converter

11: primary side end

12: primary circuit

13: resonant cavity

13 ': equivalent tank chamber

131: transformer

Np: primary side the number of turns of transformer

Ns: primary side the number of turns of transformer

14: secondary circuit

15: secondary side end

2: control circuit

21,21 ': adjustment module

211,211 ': first arithmetic device

212,212 ': Voltage loop adjuster

213,213 ': comparator

214,214 ': second arithmetic device

215,215 ': electric current loop adjuster

22: oscillator

23: phase-shift controller

24: primary side driving circuit

25: secondary side driving circuit

26: node voltage detection unit

27: resonant cavity detection unit

281: input voltage measurement unit

282: output voltage detection unit

283: output electric current measure unit

3: first terminal

4: Second terminal

Vin: input voltage

Vo: output voltage

Vref: reference voltage

Io: output electric current

Iref: reference current

Fs: switching frequency

Ip: primary side current

Is: secondary side current

Lrp: primary side inductance

Lrs: secondary inductor

Lr: resonant inductance

Crp: primary lateral capacitance

Crs: secondary lateral capacitance

Cr: resonant capacitance

Fr: resonance frequency

S1: first switch tube

S2: second switch

S3: third switching tube

S4: the four switching tube

S5: the five switching tube

S6: the six switching tube

S7: the seven switching tube

S8: the eight switching tube

A: first node

VA: the voltage of first node

B: second node

VB: the voltage of second node

C, C ': third node

VC: the voltage of third node

D, D ': fourth node

VD: the voltage of fourth node

VC_D, VC ' _ D ': the voltage between third node and fourth node

Specific embodiment

The some exemplary embodiments for embodying disclosure features and advantages will describe in detail in the explanation of back segment.It should be understood that It is that the disclosure there can be various variations in different embodiments, does not all depart from the scope of the present disclosure, and therein Illustrate and illustrate to be illustrated as being used in itself, and nand architecture is in the limitation disclosure.

Fig. 4 and Fig. 5 be disclosure preferred embodiment two-way DC converter and control circuit electrical block diagram, Wherein the two-way DC converter of Fig. 4 works in charge mode, and the two-way DC converter of Fig. 5 works in discharge mode.Such as Fig. 4 And shown in Fig. 5, two-way DC converter 1 is mainly used in Vehicular power system, and switchably works in charge mode or put Power mode.Two-way DC converter 1 receives input voltage vin, and exports output voltage Vo and output electric current Io, and include primary side End 11, primary circuit 12, resonant cavity 13, secondary circuit 14 and secondary side end 15.Resonant cavity 13 includes transformer 131, primary circuit 12 are electrically connected between primary side end 11 and the primary side of resonant cavity 13, and secondary circuit 14 is electrically connected to secondary side end 15 and resonant cavity 13 Primary side between.Primary side end 11 is connected to first terminal 3, and secondary side end 15 is connected to Second terminal 4, works as two-way DC converter In charge mode, first terminal 3 provides input voltage vin for 1 work, and Second terminal 4 receives what two-way DC converter 1 exported Output voltage Vo and output electric current Io, and when the work of two-way DC converter 1 is in discharge mode, first terminal 3 receives two-way The output voltage Vo and output electric current Io, Second terminal 4 that DC converter 1 exports provide input voltage vin.In some embodiments In, Second terminal 4 is on-vehicle battery, and but not limited to this.

For 2 framework of control circuit of the disclosure in control two-way DC converter 1, control circuit 2 includes adjustment module 21, vibration Swing device 22, phase-shift controller 23, primary side driving circuit 24 and secondary side driving circuit 25.In some embodiments, adjustment module 21, Oscillator 22 and phase-shift controller 23 constitute central controller.

Adjustment module 21 is adjusted according to output voltage Vo, reference voltage Vref, output electric current Io and reference current Iref output Save signal.

Oscillator 22 is connected to adjustment module 21, to receive and export switching frequency fs, while foundation according to adjustment signal Switching frequency fs exports first control signal.Oscillator 22 is preferably but not limited to as voltage controlled oscillator.

Phase-shift controller 23 is connected to oscillator 22, to receive switching frequency fs, and according to input voltage vin and output Voltage Vo obtains phase shifting angle, and export second control signal according to switching frequency fs and phase shifting angle, wherein first control signal Phase and the phase phase difference of the second control signal phase shifting angle.

Primary side driving circuit 24 is connected to primary circuit 12, for driving the running of primary circuit 12.Secondary side driving circuit 25 are connected to secondary circuit 14, for driving the running of secondary circuit 14.When two-way DC converter 1 works in charge mode When, as shown in figure 4, primary side driving circuit 24 is connected to oscillator 22, with the first control for receiving and being exported according to oscillator 22 Signal processed exports primary side driving signal to primary circuit 12.Secondary side driving circuit 25 is connected to phase-shift controller 23, to receive simultaneously The second control signal exported according to phase-shift controller 23 exports secondary side driving signal to secondary circuit 14.Work as bidirectional, dc Converter 1 works in discharge mode, as shown in figure 5, primary side driving circuit 24 is connected to phase-shift controller 23, to receive simultaneously The second control signal exported according to phase-shift controller 23 exports primary side driving signal to primary circuit 12, secondary side driving circuit 25 are connected to oscillator 22, export secondary side driving signal extremely with the first control signal for receiving and being exported according to oscillator 22 Secondary circuit 14.

In this embodiment, control circuit 2 uses the nested type control mode of outer voltage and current inner loop.Such as Fig. 4 and Shown in Fig. 5, adjustment module 21 include first arithmetic device 211, Voltage loop adjuster 212, comparator 213, second arithmetic device 214 and Electric current loop adjuster 215, wherein first arithmetic device 211 is connected to Voltage loop adjuster 212, and comparator 213 is connected to Voltage loop Adjuster 212 and second arithmetic device 214, electric current loop adjuster 215 are connected to second arithmetic device 214 and oscillator 22.First fortune Calculation device 211 exports difference between the two to Voltage loop adjuster 212 according to output voltage Vo and reference voltage Vref.Voltage loop tune After difference between output voltage Vo and reference voltage Vref is adjusted section device 212, output-voltage loop adjustment signal is to comparing Device 213.213 comparison voltage ring adjustment signal of comparator and reference current Iref output signal to the second fortune according to comparison result Calculate device 214.In some embodiments, the signal that comparator 213 exports is Voltage loop adjustment signal or reference current Iref, and is compared The signal exported compared with device 213 can be the smaller in such as, but not limited to Voltage loop adjustment signal and reference current Iref.It is filling Under power mode, second arithmetic device 214 exports the difference between the signal that comparator 213 exports and output electric current Io to electric current loop tune Save device 215.In discharge mode, the difference between the signal that second arithmetic device 214 exports comparator 213 and secondary side current Is It exports to electric current loop adjuster 215.Difference between the signal that electric current loop adjuster 215 exports comparator 213 and output electric current Io After value is adjusted, adjustment signal is converted to frequency information by output regulation signal to oscillator 22, oscillator 22, in order into The movement of row subsequent control.

In addition, control circuit is changed to the control mode in parallel with electric current loop using Voltage loop in other embodiments.Figure The electrical block diagram of another embodiment of 6 two-way DC converters for being Fig. 4 and control circuit, wherein bidirectional, dc becomes Parallel operation works in charge mode.Structure similar in Fig. 4 and element are given the same reference numerals, therefore repeat no more in this.Such as Fig. 6 Shown, adjustment module 21 ' includes first arithmetic device 211 ', Voltage loop adjuster 212 ', second arithmetic device 214 ', electric current loop adjusting Device 215 ' and comparator 213 ', wherein first arithmetic device 211 ' is connected to Voltage loop adjuster 212 ', and second arithmetic device 214 ' is even It is connected to electric current loop adjuster 215 ', comparator 213 ' is connected to electric current loop adjuster 215 ', Voltage loop adjuster 212 ' and oscillation Device 22.First arithmetic device 211 ' exports the difference between output voltage Vo and reference voltage Vref to Voltage loop adjuster 212 '. After difference between output voltage Vo and reference voltage Vref is adjusted Voltage loop adjuster 212 ', output-voltage loop adjusts letter Number to comparator 213 '.Second arithmetic device 214 ' exports the difference between exporting electric current Io and reference current Iref to electric current loop tune Save device 215 '.After difference between exporting electric current Io and reference current Iref is adjusted electric current loop adjuster 215 ', output electricity Ring adjustment signal is flowed to comparator 213 '.213 ' comparison voltage ring adjustment signal of comparator and electric current loop adjustment signal, and foundation Comparison result output regulation signal is to oscillator 22 so that adjustment signal is converted to frequency information by oscillator 22, in order into The movement of row subsequent control.In some embodiments, the adjustment signal that comparator 213 ' exports is Voltage loop adjustment signal or electric current Ring adjustment signal, and the adjustment signal that comparator 213 ' exports can be such as, but not limited to Voltage loop adjustment signal and electric current loop tune Save the smaller in signal.

In some embodiments, the primary circuit 12 of two-way DC converter 1 includes the first bridge arm being connected in parallel with each other And second bridge arm, wherein the first bridge arm includes the first switch tube S1 and second switch S2 being connected in series with each other, the second bridge arm Include the third switching tube S3 and the 4th switching tube S4 being connected in series with each other.Between first switch tube S1 and second switch S2 With first node A, first node A is electrically connected to one end of the primary side of resonant cavity 13, the switch of third switching tube S3 and the 4th Between pipe S4 there is second node B, second node B to be electrically connected to the other end of the primary side of resonant cavity 13.Bidirectional, dc transformation The secondary circuit 14 of device 1 includes the third bridge arm and a four bridge legs being connected in parallel with each other, and wherein third bridge arm includes and mutually goes here and there Join the 5th switching tube S5 and the 6th switching tube S6 of connection, four bridge legs include the 7th switching tube S7 that is connected in series with each other and the Eight switching tube S8.Between 5th switching tube S5 and the 6th switching tube S6 there is third node C, third node C to be electrically connected to resonance One end of the primary side of chamber 13 between the 7th switching tube S7 and the 8th switching tube S8 there is fourth node D, fourth node D to be electrically connected It is connected to the other end of the primary side of resonant cavity 13.

There is primary side current Ip in the primary side of resonant cavity 13, there is secondary side current in the primary side of resonant cavity 13 Is.Be switched on or off when for control switch Guan Qi electric current being zero, to realize Sofe Switch, need to obtain primary side current Ip and The time point that secondary side current Is is zero.In some embodiments, as shown in figs. 4 and 5, control circuit 2 is also examined comprising resonant cavity Unit 27 is surveyed, 27 framework of resonant cavity detection unit is in detection primary side current Ip and secondary side current Is and is supplied to phase shift control Device 23 processed.In other embodiments, as shown in fig. 6, control circuit 2 also includes node voltage detection unit 26, node voltage 26 framework of detection unit is in the detection voltage VA of first node A, the voltage VB of second node B, the voltage VC of third node C and the The voltage VD of four node D, and it is supplied to phase-shift controller 23.When two-way DC converter 1 works in charge mode, and detected The voltage VD of voltage VC or fourth node D of third node C when being in failing edge, primary side current Ip and secondary side current Is It is zero.When the work of two-way DC converter 1 is in discharge mode, and the voltage VA or second node B of first node A detected When voltage VB is in failing edge, primary side current Ip and secondary side current Is are zero.

Fig. 7 is the two-way DC converter for showing Fig. 4 and Fig. 5 and phase shifting angle, switching frequency and output in control circuit The schematic diagram of relationship between voltage.As shown in fig. 7, solid line is switching frequency fs and output voltage Vo in constant input voltage Relation curve under Vin, dotted line are the relation curve of phase shifting angle and output voltage Vo.It is two-way straight as output voltage Vo increases The output voltage gain of current converter 1 also gradually increases, when wherein switching frequency fs is in minimum value, two-way DC converter 1 Output voltage gain close to one, and the minimum value of switching frequency fs is greater than the resonance frequency fr of resonant cavity 13.Work as bidirectional, dc The output voltage gain of converter 1 is less than for the moment, and switching frequency fs is reduced with the increase of output voltage Vo, and phase shifting angle maintains Zero.When the output voltage gain of two-way DC converter 1 is greater than for the moment, switching frequency fs and phase shifting angle are with output voltage Vo's Increase and increases.It follows that no matter the work of two-way DC converter 1 is in charge mode or discharge mode, when bidirectional, dc becomes The output voltage gain of parallel operation 1 is less than for the moment, and control circuit 2 carries out frequency modulation control to two-way DC converter 1, and when two-way straight The output voltage gain of current converter 1 is greater than or equal to for the moment, and control circuit 2 carries out frequency modulation and shifting to two-way DC converter 1 Phase control.

Control for the switching tube in two-way DC converter 1 is varied in response to different condition and demand, with Under various control modes will be described.

In some embodiments, no matter the size of the output voltage gain of two-way DC converter 1, when bidirectional, dc convert Device 1 works in charge mode, driving signal, the driving signal of the 6th switching tube S6, the 7th switching tube of the 5th switching tube S5 The driving signal of S7 and the driving signal of the 8th switching tube S8 can work in synchronous rectification mode, wherein converting in bidirectional, dc The output voltage gain of device 1 be less than for the moment driving signal as shown in figure 8, two-way DC converter 1 output voltage gain More than or equal to for the moment shown in driving signal Fig. 9 C.The driving signal of 5th switching tube S5 is at the voltage VC of third node C In a period of time is connected in the time of high level, the driving signal of the 6th switching tube S6 is in low in the voltage VC of third node C Conducting a period of time, the driving signal of the 7th switching tube S7 are in high level in the voltage VD of fourth node D in the time of level Time in conducting a period of time, the driving signal of the 8th switching tube S8 is when the voltage VD of fourth node D is in low level Interior conducting a period of time.And when two-way DC converter 1 work in discharge mode, the driving signal of first switch tube S1, Driving signal, the driving signal of third switching tube S3 and the driving signal of the 4th switching tube S4 of second switch S2 can work In synchronous rectification mode.The driving signal of first switch tube S1 is led within the time that the voltage VA of first node A is in high level Logical a period of time, the driving signal of second switch S2 is in the low level time in the voltage VA of first node A is connected one The section time, the driving signal of third switching tube S3 is when the voltage VB of second node B is in and is connected one section in the time of high level Between, the driving signal of the 4th switching tube S4 is in the low level time in the voltage VB of second node B is connected a period of time.

It is less than for the moment in the output voltage gain of two-way DC converter 1, control circuit 2 is only to two-way DC converter 1 Frequency modulation control is carried out, carries out phase shift without the driving signal to each switching tube.Fig. 8 is the two-way DC converter of Fig. 4 defeated Voltage gain is less than switching sequence figure for the moment out.As shown in figure 8, control circuit 2 is realized by alternation switch frequency fs to double Control to DC converter 1.It is to control the switching tube work of secondary circuit 14 in synchronous rectification shape in some embodiments State is illustrated by taking a wherein period for primary side current Ip variation as an example, and moment t1, t3 and t5 are that primary side current Ip is The driving signal of zero time point, the 6th switching tube S6 and the 7th switching tube S7 are when being connected one section in the time of moment t1 to t3 Between, the driving signal of the 5th switching tube S5 and the 8th switching tube S8 are in conducting a period of time in the time of moment t3 to t5.Change speech It, the time of moment t1 to t3 is the maximum duration that the 6th switching tube S6 and the 7th switching tube S7 synchronizes rectification, moment t3 Time to t5 is the maximum duration that the 5th switching tube S5 and the 8th switching tube S8 synchronizes rectification.Certainly, in other realities It applies in example, the switching tube of secondary circuit 14 also can control to work in diode rectification state.Due to two-way DC converter 1 Primary circuit 12 and secondary circuit 14 symmetrically, with foregoing description can similarly push away the work of two-way DC converter 1 is being discharged To the control mode of the switching tube of primary circuit 12 when mode, therefore repeated no more in this.

It is greater than or equal to for the moment in the output voltage gain of two-way DC converter 1, control circuit 2 converts bidirectional, dc Device 1 carries out frequency modulation and phase shifting control.Fig. 9 A, 9B and 9C are that the two-way DC converter of Fig. 4 is greater than or waits in output voltage gain In switching sequence figure for the moment, in Fig. 9 A and 9B, two-way DC converter 1 works in charge mode, the duty of driving signal Than being 50%, control circuit 2 carries out phase shifting control for the 6th switching tube S6 and the 8th switching tube S8, and controls the 5th and open Pipe S5 and the 7th switching tube S7 work is closed in diode rectification state or synchronous rectification state, but the control for each switching tube Mode is different.In the control mode shown in Fig. 9 A, control circuit 2 is led first switch tube S1's and second switch S2 Logical moment delay phase shifting angle controls the 5th switch to obtain the turn-on instant of the 6th switching tube S6 and the 8th switching tube S8 respectively The driving signal of pipe S5 and the 7th switching tube S7 maintain off state, and the 5th switching tube S5 and the 7th switching tube S7 is made to work Diode rectification state.In the control mode shown in Fig. 9 B, control circuit 2 is by first switch tube S1's and second switch S2 Turn-on instant postpones phase shifting angle to obtain the turn-on instant of the 6th switching tube S6 and the 8th switching tube S8 respectively, and controls the 5th and open Close pipe S5 driving signal at the time of it is zero that the shutdown moment of the 6th switching tube S6 is to primary side current Ip between be connected For a period of time, and the driving signal of the 7th switching tube S7 of control the 8th switching tube S8 the shutdown moment to the primary side A period of time is connected between at the time of electric current Ip is zero.In the control mode shown in Fig. 9 C, the 5th switch of the control of control circuit 2 A period of time, the 6th switch of control is connected in the driving signal of pipe S5 within the time that the voltage VC of third node C is in high level The driving signal of pipe S6 is in the low level time in the voltage VC of third node C and a period of time is connected, and controls the 5th and open Close pipe S5 driving signal at the time of it is zero that the shutdown moment of the 6th switching tube S6 is to primary side current Ip between be connected For a period of time, and control the 7th switching tube S7 driving signal the 8th switching tube S8 the shutdown moment to the primary side electricity It flows between at the time of Ip is zero and a period of time is connected.

The two-way DC converter that Figure 10 is Fig. 5 is greater than or equal to switching sequence figure for the moment in output voltage gain.Such as Shown in Figure 10, for the work of two-way DC converter 1 in discharge mode, the duty ratio of driving signal is 50%, and control circuit 2 is by the 7th The turn-on instant of switching tube S7 and the 8th switching tube S8 postpone phase shifting angle to obtain second switch S2 and the 4th switching tube respectively The turn-on instant of S4, and control first switch tube S1 and third switching tube S3 driving signal maintains off state, make first to open Pipe S1 and third switching tube S3 work is closed in diode rectification state.Due to the primary circuit 12 and pair of two-way DC converter 1 Symmetrically, and as shown in Fig. 9 A and Figure 10, two-way DC converter 1 works in charge mode and discharge mode side circuit 14 Control mode it is also symmetrical, therefore can the control mode as shown in Fig. 8, Fig. 9 B and 9C push away to obtain 1 work of two-way DC converter Make the corresponding control mode in discharge mode, is repeated no more in this.

Certainly, it is greater than or equal in the output voltage gain of two-way DC converter 1 for the moment, for the controlling party of switching tube Formula is not limited in Fig. 9 A, Fig. 9 B, Fig. 9 C and control mode shown in Fig. 10.

In some embodiments, control circuit 2 carries out phase shifting control for the 5th switching tube S5 and the 7th switching tube S7, and The 6th switching tube S6 and the 8th switching tube S8 work is controlled in diode rectification state or synchronous rectification state.When bidirectional, dc becomes Parallel operation 1 works in charge mode, and the turn-on instant of first switch tube S1 and second switch S2 are postponed phase shift by control circuit 2 Angle to obtain the turn-on instant of the 7th switching tube S7 and the 5th switching tube S5 respectively, and the driving signal of the 6th switching tube S6 is The shutdown moment of five switching tube S5 to primary side current Ip be zero at the time of between conducting a period of time or maintain shutdown shape State, the driving signal of the 8th switching tube S8 the 7th switching tube S7 the shutdown moment to primary side current Ip be zero at the time of it Between conducting a period of time or maintain off state, when the work of two-way DC converter 1 is in discharge mode, control circuit 2 will The turn-on instant delay phase shifting angle of 7th switching tube S7 and the 8th switching tube S8 is opened with obtaining first switch tube S1 and third respectively Close the turn-on instant of pipe S3, the driving signal of the 4th switching tube S4 third switching tube S3 the shutdown moment to secondary side current Is A period of time is connected between at the time of being zero or maintains off state, the driving signal of second switch S2 is in first switch tube The shutdown moment of S1 to secondary side current Is be zero at the time of between conducting a period of time or maintain off state.

In other embodiments, control circuit 2 carries out phase shifting control for the 5th switching tube S5 and the 6th switching tube S6, And the 7th switching tube S7 and the 8th switching tube S8 work is controlled in diode rectification state or synchronous rectification state.Work as bidirectional, dc Converter 1 works in charge mode, and control circuit 2 is by the turn-on instant delay phase shifting angle of second switch S2 to obtain the 5th The driving signal of the turn-on instant of switching tube S5, the 6th switching tube S6 is complementary with the driving signal of the 5th switching tube S5, and the 7th opens Close pipe S7 driving signal at the time of it is zero that the shutdown moment of the 5th switching tube S5 is to primary side current Ip between be connected one section Time maintains off state, and shutdown moment of the driving signal of the 8th switching tube S8 in the 6th switching tube S6 is electric to primary side A period of time is connected between at the time of stream Ip is zero or maintains off state, when the work of two-way DC converter 1 is in electric discharge mould When formula, the turn-on instant delay phase shifting angle of the 8th switching tube S8 is obtained the turn-on instant of third switching tube S3 by control circuit 2, The driving signal of 4th switching tube S4 is complementary with the driving signal of third switching tube S3, and the driving signal of first switch tube S1 is The shutdown moment of three switching tube S3 to secondary side current Is be zero at the time of between conducting a period of time or maintain off state, The driving signal of second switch S2 at the time of it is zero that the shutdown moment of the 4th switching tube S4 is to secondary side current Is between Conducting a period of time maintains off state.

In other embodiment, control circuit 2 carries out phase shifting control for the 7th switching tube S7 and the 8th switching tube S8, And the 5th switching tube S5 and the 6th switching tube S6 work is controlled in diode rectification state or synchronous rectification state.Work as bidirectional, dc Converter 1 works in charge mode, and control circuit 2 is by the turn-on instant delay phase shifting angle of first switch tube S1 to obtain the 7th The driving signal of the turn-on instant of switching tube S7, the 8th switching tube S8 is complementary with the driving signal of the 7th switching tube S7, and the 5th opens Close pipe S5 driving signal at the time of it is zero that the shutdown moment of the 7th switching tube S7 is to primary side current Ip between be connected one section Time maintains off state, and shutdown moment of the driving signal of the 6th switching tube S6 in the 8th switching tube S8 is electric to primary side A period of time is connected between at the time of stream Ip is zero or maintains off state, when the work of two-way DC converter 1 is in electric discharge mould When formula, the turn-on instant delay phase shifting angle of the 7th switching tube S7 is obtained the turn-on instant of first switch tube S1 by control circuit 2, The driving signal of second switch S2 is complementary with the driving signal of first switch tube S1, and the driving signal of third switching tube S3 is The shutdown moment of one switching tube S1 to secondary side current Is be zero at the time of between conducting a period of time or maintain off state, The driving signal of 4th switching tube S4 at the time of it is zero that the shutdown moment of second switch S2 is to secondary side current Is between lead Logical a period of time maintains off state.

Referring again to Fig. 4.In some embodiments, control circuit 2 is also comprising input voltage measurement unit 281, output electricity Detection unit 282 and output electric current measure unit 283 are pressed, 281 framework of input voltage measurement unit is in detection input voltage vin And it is supplied to phase-shift controller 23,282 framework of output voltage detection unit is in detection output voltage Vo and is supplied to adjustment module 21,21 ' and phase-shift controller 23,283 framework of output electric current measure unit is in detection output electric current Io and is supplied to adjustment module 21、21’。

In some embodiments, the resonant cavity 13 of two-way DC converter 1 includes also resonant element, as shown in figure 4, humorous The primary side of vibration chamber 13 includes resonant inductance Lr and primary lateral capacitance Crp, and the primary side of resonant cavity 13 includes secondary lateral capacitance Crs.In fact, the actual implementation mode of the resonant element of resonant cavity 13 is not limited thereto.Figure 11 A, Figure 11 B, Figure 11 C, figure 11D, Figure 11 E, Figure 11 F, Figure 11 G and Figure 11 H are the electrical block diagram of the numerous embodiments of the resonant cavity of Fig. 4.Yu Tu In embodiment shown in 11A, the primary side of resonant cavity 13 includes primary side inductance Lrp and primary lateral capacitance Crp, resonant cavity 13 primary side includes secondary inductor Lrs and secondary lateral capacitance Crs.In the embodiment shown in Figure 11 B, resonant cavity 13 Primary side include primary lateral capacitance Crp, the primary side of resonant cavity 13 includes resonant inductance Lr and secondary lateral capacitance Crs.Yu Tu In embodiment shown in 11C, the primary side of resonant cavity 13 includes primary side inductance Lrp and resonant capacitance Cr, resonant cavity 13 Primary side includes secondary inductor Lrs.In the embodiment shown in Figure 11 D, the primary side of resonant cavity 13 includes primary side electricity Feel Lrp, the primary side of resonant cavity 13 includes secondary inductor Lrs and resonant capacitance Cr.In the embodiment shown in Figure 11 E, The primary side of resonant cavity 13 includes resonant inductance Lr and resonant capacitance Cr.In the embodiment shown in Figure 11 F, resonant cavity 13 Primary side includes resonant inductance Lr and resonant capacitance Cr.In the embodiment shown in Figure 11 G, the primary side of resonant cavity 13 includes Resonant inductance Lr, the primary side of resonant cavity 13 include resonant capacitance Cr.In the embodiment shown in Figure 11 H, resonant cavity 13 Primary side includes resonant capacitance Cr, and the primary side of resonant cavity includes resonant inductance Lr.

In addition, primary side inductance Lrp and secondary inductor Lrs are equivalent to resonant inductance Lr, relationship meets equation (1). Primary lateral capacitance Crp and secondary lateral capacitance Crs are equivalent to resonant capacitance Cr, and relationship meets equation (2).

Wherein, Np and Ns is respectively primary side the number of turns and primary side the number of turns of transformer 131.

And resonant inductance Lr and resonant capacitance Cr is utilized, it can be calculated by equation (3) and obtain resonance frequency fr.

Figure 12 is the equivalent circuit structure schematic diagram of the resonant cavity of Fig. 4.The possible embodiment of above-mentioned each resonant cavity 13 is equal It can be equivalent to equivalent tank chamber 13 ' shown in Figure 12, as shown in figure 12, equivalent tank chamber 13 ' includes resonant inductance Lr and resonance Capacitor Cr, and as shown in equation (4), the voltage between third node and fourth node also changes therewith.

Wherein, VC ' _ D ' is the third node C ' and the 4th when resonant cavity 13 is equivalent to resonant inductance Lr and resonant capacitance Cr Voltage between node D ', VC_D be resonant cavity 13 include transformer 131 and resonant element when third node C and fourth node D Between voltage.

In conclusion the disclosure provides a kind of control circuit suitable for two-way DC converter, adjustment module foundation Output voltage, reference voltage, output electric current and reference current generate adjustment signal, through one control signal of oscillator output, phase shift Controller generates another control signal according to corresponding switching frequency and input and output voltage, makes driving circuit according to control signal The switching tube of the former secondary circuit of two-way DC converter is controlled.Therefore, the control circuit of the disclosure is to utilize frequency modulation And/or phase shift controls two-way DC converter, can satisfy the demand of wide-range voltage gain, and because it is with resonance Element is able to achieve Sofe Switch, and switching loss and lifting system efficiency is effectively reduced.

It may be noted that above-mentioned is only the preferred embodiment proposed to illustrate the disclosure, the present disclosure is not limited to the implementations Example, the scope of the present disclosure are determined by claim.And the disclosure can be applied craftsman by those skilled in the art times and think and carry out various change Into all not departing from claim scope of the claimed so.

Claims (22)

1. a kind of control circuit suitable for two-way DC converter, which is applied to a vehicle power supply system System, and ground work can be switched in charge mode or discharge mode, which receives an input voltage, and exports one Output voltage and an output electric current, the two-way DC converter include a primary side end, a primary circuit, a resonant cavity, a secondary side Circuit and a secondary side end, which includes a transformer, which is electrically connected to the one of the primary side end and the resonant cavity Between primary side, which is electrically connected between the pair side end and a primary side of the resonant cavity, which is characterized in that the control Circuit processed includes:

One adjustment module adjusts letter according to the output voltage, a reference voltage, the output electric current and a reference current output one Number；

One oscillator is connected to the adjustment module, to receive and export a switching frequency according to the adjustment signal, and opens according to this Close one first control signal of rate-adaptive pacemaker；

One phase-shift controller is connected to the oscillator, to receive the switching frequency, and according to the input voltage and the output voltage A phase shifting angle is obtained, and a second control signal is exported according to the switching frequency and the phase shifting angle；

One primary side driving circuit, is connected to the primary circuit, wherein when two-way DC converter work is in charge mode, it should Primary side driving circuit receives and the first control signal exported according to the oscillator exports a primary side driving signal to the original Side circuit, when two-way DC converter work is in discharge mode, which receives and according to the phase shifting control The second control signal that device is exported exports the primary side driving signal to the primary circuit, to drive the fortune of the primary circuit Make；And

One secondary side driving circuit, is connected to the secondary circuit, wherein when two-way DC converter work is in charge mode, it should The secondary driving signal when driving circuit receives and the second control signal exported according to the phase-shift controller exports a pair is extremely The secondary circuit, when two-way DC converter work is in discharge mode, which receives and according to the oscillation The first control signal that device is exported exports the pair side driving signal to the secondary circuit, to drive the fortune of the secondary circuit Make.

2. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that when the bidirectional, dc Converter works in charge mode, which exports the output voltage and this outputs current to a vehicle mounted electric Pond, when two-way DC converter work is in discharge mode, which receives the input from the on-vehicle battery Voltage.

3. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the adjustment module packet Containing a first arithmetic device interconnected and a Voltage loop adjuster, the first arithmetic device is according to the output voltage and the reference electricity Pressure exports the difference between the output voltage and the reference voltage to the Voltage loop adjuster, and the Voltage loop adjuster is according to the output Difference between voltage and the reference voltage exports a Voltage loop adjustment signal.

4. being suitable for the control circuit of two-way DC converter as claimed in claim 3, which is characterized in that the adjustment module is also Comprising a comparator, a second arithmetic device and an electric current loop adjuster, the comparator be connected to the Voltage loop adjuster and this Two arithmetic units, the electric current loop adjuster are connected to the second arithmetic device and the oscillator, and wherein the comparator receives and compares this Voltage loop adjustment signal and the reference current, and a signal is exported to the second arithmetic device, second operation according to comparison result Device exports the difference between the signal and the output electric current to the electric current loop adjuster, the electric current according to the signal and the output electric current Ring adjuster exports the adjustment signal to the oscillator according to the difference between the signal and the output electric current.

5. being suitable for the control circuit of two-way DC converter as claimed in claim 4, which is characterized in that comparator output The signal be the Voltage loop adjustment signal or the reference current.

6. being suitable for the control circuit of two-way DC converter as claimed in claim 3, which is characterized in that the adjustment module is also Comprising a second arithmetic device, an electric current loop adjuster and a comparator, which is connected to the electric current loop adjuster, should Comparator is connected to the electric current loop adjuster, the Voltage loop adjuster and the oscillator, and wherein the second arithmetic device is defeated according to this Electric current and the reference current export the difference between the output electric current and the reference current to the electric current loop adjuster, the electric current loop out Adjuster exports an electric current loop adjustment signal according to the difference between the output electric current and the reference current, which receives and compare The adjustment signal is exported to the oscillator compared with the Voltage loop adjustment signal and the electric current loop adjustment signal, and according to comparison result.

7. being suitable for the control circuit of two-way DC converter as claimed in claim 6, which is characterized in that comparator output The adjustment signal be the Voltage loop adjustment signal or the electric current loop adjustment signal.

8. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the bidirectional, dc becomes The primary circuit of parallel operation includes one first bridge arm and one second bridge arm being connected in parallel with each other, which includes to be serially connected A first switch tube and a second switch for connection, second bridge arm include the third switching tube and one being connected in series with each other 4th switching tube wherein has a first node, first node electrical connection between the first switch tube and the second switch There is a second node between one end of the primary side, the third switching tube and the 4th switching tube, which is electrically connected Be connected to the other end of the primary side, the secondary circuit of the two-way DC converter include the third bridge arm being connected in parallel with each other and One four bridge legs, the third bridge arm include one the 5th switching tube and one the 6th switching tube being connected in series with each other, the four bridge legs Comprising one the 7th switching tube being connected in series with each other and one the 8th switching tube, wherein the 5th switching tube and the 6th switching tube it Between there is a third node, which is electrically connected to one end of the primary side, the 7th switching tube and the 8th switching tube Between there is a fourth node, which is electrically connected to the other end of the primary side.

9. being suitable for the control circuit of two-way DC converter as claimed in claim 8, which is characterized in that the resonant cavity is somebody's turn to do There is a primary side current in primary side, there is a secondary side current in the primary side of the resonant cavity, which also wraps Containing a node voltage detection unit, the node voltage detection unit framework is in voltage, the second node for detecting the first node Voltage, the voltage of the third node and the voltage of the fourth node and be supplied to the phase-shift controller, when the bidirectional, dc become Parallel operation works in charge mode, and when the voltage of the third node detected or the voltage of the fourth node are in failing edge, The primary side current and the secondary side current are zero, when two-way DC converter work is in discharge mode, and it is detected should When the voltage of the voltage of first node or the second node is in failing edge, the primary side current and the secondary side current are zero.

10. being suitable for the control circuit of two-way DC converter as claimed in claim 8, which is characterized in that the resonant cavity There is a primary side current in the primary side, there is a secondary side current in the primary side of the resonant cavity, the control circuit is also Comprising a resonant cavity detection unit, the resonant cavity detection unit framework is in the detection primary side current and the secondary side current and mentions Supply the phase-shift controller.

11. the control circuit suitable for two-way DC converter as described in claim 9 or 10, which is characterized in that when this pair To the output voltage gain of DC converter be greater than or equal to one and work in charge mode, which first opens this The turn-on instant for closing pipe and the second switch postpones the phase shifting angle to obtain the 6th switching tube and the 8th switching tube respectively Turn-on instant, the driving signal of the 5th switching tube is when shutdown moment to primary side current of the 6th switching tube is zero Conducting a period of time or off state is maintained between quarter, the shutdown of the driving signal of the 7th switching tube in the 8th switching tube A period of time is connected between at the time of moment to the primary side current is zero or maintains off state, when the bidirectional, dc converts The output voltage gain of device be greater than or equal to one and work in discharge mode, the control circuit by the 7th switching tube and this The turn-on instant of eight switching tubes postpones the phase shifting angle to obtain the turn-on instant of the second switch and the 4th switching tube respectively, is somebody's turn to do The driving signal of first switch tube at the time of shutdown moment to secondary side current of the second switch is zero between be connected A period of time maintains off state, the driving signal of the third switching tube the 4th switching tube the shutdown moment to this time A period of time is connected between at the time of grade side electric current is zero or maintains off state.

12. the control circuit suitable for two-way DC converter as described in claim 9 or 10, which is characterized in that when this pair To the output voltage gain of DC converter be greater than or equal to one and work in charge mode, which first opens this The turn-on instant for closing pipe and the second switch postpones the phase shifting angle to obtain the 7th switching tube and the 5th switching tube respectively Turn-on instant, the driving signal of the 6th switching tube is when shutdown moment to primary side current of the 5th switching tube is zero Conducting a period of time or off state is maintained between quarter, the shutdown of the driving signal of the 8th switching tube in the 7th switching tube A period of time is connected between at the time of moment to the primary side current is zero or maintains off state, when the bidirectional, dc converts The output voltage gain of device be greater than or equal to one and work in discharge mode, the control circuit by the 7th switching tube and this The turn-on instant of eight switching tubes postpones the phase shifting angle to obtain the turn-on instant of the first switch tube and third switching tube respectively, is somebody's turn to do The driving signal of 4th switching tube at the time of shutdown moment to secondary side current of the third switching tube is zero between be connected A period of time maintains off state, the driving signal of the second switch the first switch tube the shutdown moment to this time A period of time is connected between at the time of grade side electric current is zero or maintains off state.

13. the control circuit suitable for two-way DC converter as described in claim 9 or 10, which is characterized in that when this pair To the output voltage gain of DC converter be greater than or equal to one and work in charge mode, which second opens this The turn-on instant for closing pipe postpones the phase shifting angle to obtain the turn-on instant of the 5th switching tube, the driving signal of the 6th switching tube It is complementary with the driving signal of the 5th switching tube, the driving signal of the 7th switching tube the 5th switching tube the shutdown moment extremely A period of time is connected between at the time of the primary side current is zero or maintains off state, the driving signal of the 8th switching tube A period of time is connected between at the time of shutdown moment to primary side current of the 6th switching tube is zero or maintains shutdown State, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in discharge mode, the control is electric The turn-on instant of 8th switching tube is postponed the phase shifting angle to obtain the turn-on instant of the third switching tube, the 4th switch by road The driving signal of pipe is complementary with the driving signal of the third switching tube, and the driving signal of the first switch tube is in the third switching tube Shutdown moment to the secondary side current at the time of be zero between conducting a period of time or maintain off state, the second switch The driving signal of pipe at the time of shutdown moment to secondary side current of the 4th switching tube is zero between be connected a period of time Or maintain off state.

14. the control circuit suitable for two-way DC converter as described in claim 9 or 10, which is characterized in that when this pair To the output voltage gain of DC converter be greater than or equal to one and work in charge mode, which first opens this The turn-on instant for closing pipe postpones the phase shifting angle to obtain the turn-on instant of the 7th switching tube, the driving signal of the 8th switching tube It is complementary with the driving signal of the 7th switching tube, the driving signal of the 5th switching tube the 7th switching tube the shutdown moment extremely A period of time is connected between at the time of the primary side current is zero or maintains off state, the driving signal of the 6th switching tube A period of time is connected between at the time of shutdown moment to primary side current of the 8th switching tube is zero or maintains shutdown State, when the output voltage gain of the two-way DC converter is greater than or equal to one and works in discharge mode, the control is electric The turn-on instant of 7th switching tube is postponed the phase shifting angle to obtain the turn-on instant of the first switch tube by road, the second switch The driving signal of pipe and the driving signal of the first switch tube are complementary, and the driving signal of the third switching tube is in the first switch tube Shutdown moment to the secondary side current at the time of be zero between conducting a period of time or maintain off state, the 4th switch The driving signal of pipe at the time of shutdown moment to secondary side current of the second switch is zero between be connected a period of time Or maintain off state.

15. being suitable for the control circuit of two-way DC converter as claimed in claim 9, which is characterized in that when this is two-way straight Current converter works in charge mode, and the driving signal of the 5th switching tube is in high level in the voltage of the third node Conducting a period of time, the driving signal of the 6th switching tube are in the low level time in the voltage of the third node in time Conducting a period of time, the driving signal of the 7th switching tube are connected one within the time that the voltage of the fourth node is in high level The section time, the driving signal of the 8th switching tube is when the voltage of the fourth node is in and is connected one section in the low level time Between, when two-way DC converter work is in discharge mode, the electricity of the driving signal of the first switch tube in the first node Pressure conducting a period of time, driving signal of the second switch within the time of high level are in the voltage of the first node Conducting a period of time, the driving signal of the third switching tube are in high level in the voltage of the second node in the low level time Time in conducting a period of time, the driving signal of the 4th switching tube is in the low level time in the voltage of the second node Interior conducting a period of time.

16. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the control circuit It also include an input voltage measurement unit, an output voltage detection unit and an output electric current measure unit, input voltage inspection Unit structure is surveyed in detecting the input voltage and being supplied to the phase-shift controller, which should in detection Output voltage is simultaneously supplied to the adjustment module and the phase-shift controller, and the output electric current measure unit structure is electric in detecting the output It flows and is supplied to the adjustment module.

17. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the bidirectional, dc The resonant cavity of converter includes a resonant inductance.

18. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the resonant cavity The primary side includes a primary side inductance, and the primary side of the resonant cavity includes a secondary inductor, the primary side inductance with should Secondary inductor is equivalent to a resonant inductance.

19. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the bidirectional, dc The resonant cavity of converter includes a resonant capacitance.

20. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the resonant cavity The primary side includes a primary lateral capacitance, and the primary side of the resonant cavity includes a grade lateral capacitance, the primary lateral capacitance be somebody's turn to do Primary side capacitor equivalent is in a resonant capacitance.

21. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the bidirectional, dc The resonant cavity of converter has a resonance frequency, which is greater than the resonance frequency.

22. being suitable for the control circuit of two-way DC converter as described in claim 1, which is characterized in that the oscillator is One voltage controlled oscillator.