CN109245593A

CN109245593A - Control circuit and method suitable for two-way DC converter

Info

Publication number: CN109245593A
Application number: CN201811221264.4A
Authority: CN
Inventors: 孙浩; 贾民立; 章进法
Original assignee: Delta Electronics Shanghai Co Ltd
Current assignee: Delta Electronics Shanghai Co Ltd
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2019-01-18

Abstract

The present invention provides a kind of control circuit and method 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.

Description

Control circuit and method suitable for two-way DC converter

Technical field

The present invention relates to a kind of control circuit and method, in particular to a kind of control electricity suitable for two-way DC converter Road and method.

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 needs of energy in bidirectional flow, 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 it is a kind of can improve the above-mentioned prior art suitable for two-way DC converter control circuit and Method, actually urgent demand at present.

Summary of the invention

The disclosure is designed to provide a kind of control circuit and method suitable for two-way DC converter, adjusts mould Block generates adjustment signal according to output voltage, reference voltage, output electric current and reference current, believes through one control of oscillator output Number, phase-shift controller generates another control signal according to corresponding switching frequency and input and output voltage, makes driving circuit foundation Control signal controls the switching tube of the former and deputy side circuit of two-way DC converter.Therefore, the control circuit of the disclosure and Method is to be controlled using frequency modulation and/or phase shift two-way DC converter, can satisfy the demand of wide-range voltage gain, And because it is with resonant element, it is able to achieve Sofe Switch, switching loss and lifting system efficiency is effectively reduced.

In order to achieve the above object, the disclosure provides a kind of control circuit, it is suitable for two-way DC converter.Bidirectional, dc transformation Device is applied to Vehicular power system, and switchably works in charge mode or discharge mode.Two-way DC converter receives defeated Enter voltage, and exports output voltage and output electric current.Two-way DC converter includes primary side end, primary circuit, resonant cavity, secondary 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.

In order to achieve the above object, the disclosure also provides a kind of control method, it is suitable for two-way DC converter.Bidirectional, dc becomes Parallel operation is applied to Vehicular power system, and switchably works 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 method includes step: (a) utilizing adjustment module foundation Output voltage, reference voltage, output electric current and reference current generate adjustment signal；(b) using oscillator reception and according to adjusting Signal generates switching frequency, and generates first control signal according to switching frequency；(c) switch frequency is received using phase-shift controller Rate, and phase shifting angle is obtained according to input voltage and output voltage, and generate the second control letter according to switching frequency and phase shifting angle Number；(d) when two-way DC converter work is in charge mode, using the reception of primary side driving circuit and according to first control signal Generate primary side driving signal, when two-way DC converter work in discharge mode, utilize primary side driving circuit receive and foundation Second control signal generates primary side driving signal, to drive the running of primary circuit；And (e) when two-way DC converter works In charge mode, using the secondary driving signal when driving circuit receives and generates secondary according to second control signal, when two-way straight Current converter works in discharge mode, drives letter when driving circuit receives and generates secondary according to first control signal using secondary Number, to drive the running of secondary circuit.

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.

A variety of realities of Figure 11 A, Figure 11 B, Figure 11 C, Figure 11 D, Figure 11 E, Figure 11 F, the resonant cavity that Figure 11 G and Figure 11 H are Fig. 4 Apply the electrical block diagram of mode.

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

Figure 13 is the flow chart of the control method of disclosure preferred embodiment.

Figure 14 is the flow chart of the sub-step of control method shown in Figure 13.

Figure 15 is the flow chart of another embodiment of the sub-step of control method shown in Figure 13.

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

S10, S20, S30, S40, S50, S11, S12, S13, S14, S15, S13 ', S14 ', S15 ': the step of control method

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 electricity Pressure Vo obtains phase shifting angle, and exports second control signal according to switching frequency fs and phase shifting angle, wherein the phase of first control signal Position 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.When bidirectional, dc becomes Parallel operation 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 foundation The second control signal that phase-shift controller 23 is exported exports primary side driving signal to primary circuit 12, and secondary side driving circuit 25 connects Be connected to oscillator 22, with the first control signal output for receiving and being exported according to oscillator 22 it is secondary while driving signal to it is secondary while electricity Road 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.Have between first switch tube S1 and second switch S2 There are first node A, first node A to be electrically connected to one end of the primary side of resonant cavity 13, third switching tube S3 and the 4th switching tube Between 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.Two-way DC converter 1 Secondary circuit 14 include the third bridge arm and a four bridge legs that are connected in parallel with each other, wherein third bridge arm includes the company of being serially connected The 5th switching tube S5 connect and the 6th switching tube S6, four bridge legs include that the 7th switching tube S7 and the 8th being connected in series with each other is opened Close pipe 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 resonant cavity 13 Primary side one end, there is fourth node D, fourth node D is electrically connected between the 7th switching tube S7 and the 8th switching tube S8 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 for control switch pipe when its electric current is 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 shifting control Device 23.In other embodiments, as shown in fig. 6, control circuit 2 also includes node voltage detection unit 26, node voltage inspection 26 framework of unit is surveyed in the voltage VC and the 4th of the detection voltage VA of first node A, the voltage VB of second node B, third node C The voltage VD of node D, and it is supplied to phase-shift controller 23.When the work of two-way DC converter 1 is in charge mode, and it is detected When the voltage VD of the voltage VC or fourth node D of third node C are in failing edge, primary side current Ip and secondary side current Is are Zero.When two-way DC converter 1 works in discharge mode, and the electricity of the voltage VA or second node B of first node A detected When pressure 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 zero Time point, the driving signal of 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 the original of two-way DC converter 1 Side circuit 12 and secondary circuit 14 symmetrically, with foregoing description can similarly push away the work of two-way DC converter 1 in electric discharge mould To the control mode of the switching tube of primary circuit 12 when formula, 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 switch Pipe S5 and the 7th switching tube S7 works in diode rectification state or synchronous rectification state, but for the control mode of each switching tube It is different.In the control mode shown in Fig. 9 A, when control circuit 2 is by the conducting of first switch tube S1 and second switch S2 Delay phase shifting angle is carved to obtain the turn-on instant of the 6th switching tube S6 and the 8th switching tube S8 respectively, and controls the 5th switching tube S5 And the 7th the driving signal of switching tube S7 maintain off state, so that the 5th switching tube S5 and the 7th switching tube S7 is worked in two poles Pipe rectification state.In the control mode shown in Fig. 9 B, control circuit 2 is by the conducting of first switch tube S1 and second switch S2 Moment 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 switching tube The driving signal of S5 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 one section Time, and the 7th switching tube S7 of control driving signal the 8th switching tube S8 the shutdown moment to primary side current Ip A period of time is connected between at the time of being zero.In the control mode shown in Fig. 9 C, control circuit 2 controls the 5th switching tube S5's A period of time is connected in driving signal within the time that the voltage VC of third node C is in high level, the 6th switching tube S6's of control Driving signal 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 switching tube 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 one section when Between, and the driving signal of the 7th switching tube S7 of control is to primary side current Ip at the shutdown moment of the 8th switching tube S8 A period of time is connected between at the time of zero.

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 5th The shutdown moment of switching tube S5 to primary side current Ip be zero at the time of between conducting a period of time or maintain off state, the The driving signal of eight switching tube S8 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 A period of time maintains off state, and when the work of two-way DC converter 1 is in discharge mode, control circuit 2 is opened the 7th The turn-on instant delay phase shifting angle of pipe S7 and the 8th switching tube S8 is closed to obtain first switch tube S1 and third switching tube S3 respectively Turn-on instant, the driving signal of the 4th switching tube S4 third switching tube S3 the shutdown moment to secondary side current Is be zero A period of time is connected between moment or maintains off state, the driving signal of second switch S2 is in the pass of first switch tube S1 The disconnected moment 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 Press detection unit 282 and output electric current measure unit 283,281 framework of input voltage measurement unit in detection input voltage vin simultaneously Be supplied to phase-shift controller 23,282 framework of output voltage detection unit in detection output voltage Vo and be supplied to adjustment module 21, 21 ' and phase-shift controller 23,283 framework of output electric current measure unit in detection output electric current Io and be 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, resonance The primary side of 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 11 D, The electrical block diagram of the numerous embodiments of Figure 11 E, Figure 11 F, the resonant cavity that Figure 11 G and Figure 11 H are Fig. 4.In Figure 11 A institute In the embodiment shown, the primary side of resonant cavity 13 includes primary side inductance Lrp and primary lateral capacitance Crp, time of resonant cavity 13 Grade side includes secondary inductor Lrs and secondary lateral capacitance Crs.In the embodiment shown in Figure 11 B, the primary side of resonant cavity 13 Comprising primary lateral capacitance Crp, the primary side of resonant cavity 13 includes resonant inductance Lr and secondary lateral capacitance Crs.Shown in Figure 11 C In embodiment, the primary side of resonant cavity 13 includes primary side inductance Lrp and resonant capacitance Cr, and the primary side of resonant cavity 13 includes Secondary inductor Lrs.In the embodiment shown in Figure 11 D, the primary side of resonant cavity 13 includes primary side inductance Lrp, resonance The primary side of chamber 13 includes secondary inductor Lrs and resonant capacitance Cr.In the embodiment shown in Figure 11 E, resonant cavity 13 Primary side includes resonant inductance Lr and resonant capacitance Cr.In the embodiment shown in Figure 11 F, the primary side of resonant cavity 13 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, the primary side packet of resonant cavity 13 Cr containing resonant capacitance, the primary side of resonant cavity include 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.

Figure 13 is the flow chart of the control method of disclosure preferred embodiment.The control method of this embodiment is suitable for Fig. 4 And two-way DC converter 1 shown in fig. 5 and control circuit 2, and comprise the following steps:

Firstly, using adjustment module 21,21 ' according to output voltage Vo, reference voltage Vref, output electric current Io and reference electricity It flows Iref and generates adjustment signal (as shown in step S10).

Then, it is received using oscillator 22 and generates switching frequency fs according to adjustment signal, and produced according to switching frequency fs Raw first control signal (as shown in step S20).

Then, switching frequency fs is received using phase-shift controller 23, and is obtained according to input voltage vin and output voltage Vo Phase shifting angle, and generate second control signal according to switching frequency fs and phase shifting angle (as shown in step S30).

Then, it when the work of two-way DC converter 1 is in charge mode, is received using primary side driving circuit 24 and according to the One control signal generate primary side driving signal, when two-way DC converter 1 work in discharge mode, utilize primary side driving circuit 24 receive and generate primary side driving signal according to second control signal, to drive the running of primary circuit 12 (such as step S40 institute Show), wherein switching tube in primary circuit 12 is controlled using any control mode above-mentioned.

Finally, being received using secondary side driving circuit 25 and when the work of two-way DC converter 1 is in charge mode according to the Two control signals generate secondary side driving signals, when the work of two-way DC converter 1 is in discharge mode, utilize secondary side driving circuit 25 receive and generate secondary side driving signal according to first control signal, to drive the running of secondary circuit 14 (such as step S50 institute Show), wherein switching tube in secondary circuit 14 is controlled using any switch controlled mode above-mentioned.

Figure 14 is the flow chart of the sub-step of control method shown in Figure 13.In some embodiments, as shown in figure 14, control The step S10 of method processed also includes substep:

Output voltage Vo and ginseng are generated according to output voltage Vo and reference voltage Vref using first arithmetic device 211,211 ' Examine the difference between voltage Vref (as shown in step S11)；

Voltage is generated according to the difference between output voltage Vo and reference voltage Vref using Voltage loop adjuster 212,212 ' Ring adjustment signal (as shown in step S12)；

It is received using comparator 213 and comparison voltage ring adjustment signal and reference current Iref, foundation comparison result generates Signal (as shown in step S13), the signal that wherein comparator 213 exports are Voltage loop adjustment signal or reference current Iref；

The difference between signal and output electric current Io is generated (such as using 214 basis signal of second arithmetic device and output electric current Io Shown in step S14)；And

Adjustment signal (such as step S15 is generated using the difference between 215 basis signal of electric current loop adjuster and output electric current Io It is shown).

Figure 15 is the flow chart of another embodiment of the sub-step of control method shown in Figure 13.Wherein with phase in Figure 14 As step be given the same reference numerals, therefore repeated no more in this.And compared to the sub-step of step S10 shown in Figure 14, such as scheme Shown in 15, the step S10 of control method is changed to comprising sub-step S11, S12 and substep:

It is generated using second arithmetic device 214 ' according to output electric current Io and reference current Iref and exports electric current Io and with reference to electricity Flow the difference between Iref (shown in such as step S13 ')；

Electric current loop tune is generated according to the difference between output electric current Io and reference current Iref using electric current loop adjuster 215 ' Save signal (shown in such as step S14 ')；And

It is received using comparator 213 ' and comparison voltage ring adjustment signal and electric current loop adjustment signal, foundation comparison result produces Raw adjustment signal (shown in such as step S15 '), wherein generated adjustment signal is that Voltage loop adjustment signal or electric current loop adjust letter Number.

In conclusion the disclosure provides a kind of control circuit and method suitable for two-way DC converter, mould is adjusted Block generates adjustment signal according to output voltage, reference voltage, output electric current and reference current, believes through one control of oscillator output Number, phase-shift controller generates another control signal according to corresponding switching frequency and input and output voltage, makes driving circuit foundation Control signal controls the switching tube of the former secondary circuit of two-way DC converter.Therefore, the control circuit of the disclosure and Method is to be controlled using frequency modulation and/or phase shift two-way DC converter, can satisfy the demand of wide-range voltage gain, And because it is with resonant element, it is able to achieve Sofe Switch, 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

1. a kind of control circuit, is suitable for a 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 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. control circuit as described in claim 1, wherein this is two-way when two-way DC converter work is in charge mode DC converter exports the output voltage and this outputs current to an on-vehicle battery, when two-way DC converter work is being discharged When mode, which receives the input voltage from the on-vehicle battery.

3. control circuit as described in claim 1, wherein the adjustment module includes a first arithmetic device interconnected and one Voltage loop adjuster, the first arithmetic device is according to the output voltage and the reference voltage output output voltage and the reference voltage Between difference to the Voltage loop adjuster, which exports according to the difference between the output voltage and the reference voltage One Voltage loop adjustment signal.

4. control circuit as claimed in claim 3, wherein the adjustment module also includes a comparator, a second arithmetic device and one Electric current loop adjuster, the comparator are connected to the Voltage loop adjuster and the second arithmetic device, which is connected to The second arithmetic device and the oscillator, wherein the comparator receives and compares the Voltage loop adjustment signal and the reference current, and A signal is exported to the second arithmetic device according to comparison result, which should according to the signal and output electric current output Difference between signal and the output electric current is to the electric current loop adjuster, and the electric current loop adjuster is according to the signal and the output electric current Between difference export the adjustment signal to the oscillator.

5. control circuit as claimed in claim 4, wherein the signal of comparator output be the Voltage loop adjustment signal or The reference current.

6. control circuit as claimed in claim 3, wherein the adjustment module also includes a second arithmetic device, electric current loop adjusting Device and a comparator, the second arithmetic device are connected to the electric current loop adjuster, which is connected to the electric current loop adjuster, is somebody's turn to do Voltage loop adjuster and the oscillator, wherein the second arithmetic device exports output electricity according to the output electric current and the reference current Difference between stream and the reference current is to the electric current loop adjuster, and the electric current loop adjuster is according to the output electric current and the reference electricity Difference between stream exports an electric current loop adjustment signal, which receives and compare the Voltage loop adjustment signal and the electric current loop tune Signal is saved, and exports the adjustment signal to the oscillator according to comparison result.

7. control circuit as claimed in claim 6, wherein the adjustment signal of comparator output is that the Voltage loop adjusts letter Number or the electric current loop adjustment signal.

8. control circuit as described in claim 1, wherein the primary circuit of the two-way DC converter includes company parallel with one another One first bridge arm and one second bridge arm connect, first bridge arm include that the first switch tube being connected in series with each other and one second open Guan Guan, second bridge arm include the third switching tube and one the 4th switching tube being connected in series with each other, wherein the first switch tube There is a first node between the second switch, which is electrically connected to one end of the primary side, third switch There is a second node, which is electrically connected to the other end of the primary side, this is two-way between pipe and the 4th switching tube The secondary circuit of DC converter includes the third bridge arm and a four bridge legs being connected in parallel with each other, which includes phase One the 5th switching tube being mutually connected in series and one the 6th switching tube, the four bridge legs include one the 7th switch being connected in series with each other Pipe and one the 8th switching tube wherein have a third node, the third node between the 5th switching tube and the 6th switching tube Be electrically connected to one end of the primary side, between the 7th switching tube and the 8th switching tube have a fourth node, Section four Point is electrically connected to the other end of the primary side.

9. control circuit as claimed in claim 8 wherein has a primary side current in the primary side of the resonant cavity, this is humorous There is a secondary side current, which also includes a node voltage detection unit, node electricity in primary side of chamber of shaking Press detection unit framework in the detection voltage of the first node, the voltage of the second node, the third node voltage and this The voltage of four nodes is simultaneously supplied to the phase-shift controller, when two-way DC converter work is in charge mode, and it is detected When the voltage of the third node 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 the voltage of the first node detected or the second node When voltage is in failing edge, the primary side current and the secondary side current are zero.

It, should 10. control circuit as claimed in claim 8 wherein has a primary side current in the primary side of the resonant cavity There is a secondary side current, which also includes a resonant cavity detection unit, the resonant cavity in the primary side of resonant cavity Detection unit framework is in the detection primary side current and the secondary side current and is supplied to the phase-shift controller.

11. the control circuit as described in claim 9 or 10, wherein the output voltage gain when the two-way DC converter is greater than Or be equal to one and work in charge mode, which prolongs the turn-on instant of the first switch tube He the second switch The slow phase shifting angle to obtain the turn-on instant of the 6th switching tube and the 8th switching tube, the driving signal of the 5th switching tube respectively 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, the driving signal of the 7th 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 postpones the phase shifting angle for the turn-on instant of the 7th switching tube and the 8th switching tube for work To obtain the turn-on instant of the second switch and the 4th switching tube respectively, the driving signal of the first switch tube second is opened at this A period of time is connected between at the time of shutdown moment to the secondary side current for closing pipe is zero or maintains off state, the third The driving signal of switching tube at the time of shutdown moment to secondary side current of the 4th switching tube is zero between be connected one section Time maintains off state.

12. the control circuit as described in claim 9 or 10, wherein the output voltage gain when the two-way DC converter is greater than Or be equal to one and work in charge mode, which prolongs the turn-on instant of the first switch tube He the second switch The slow phase shifting angle to obtain the turn-on instant of the 7th switching tube and the 5th switching tube, the driving signal of the 6th switching tube respectively 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 7th 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 7th switching tube and the 8th switching tube for work To obtain the turn-on instant of the first switch tube and third switching tube respectively, the driving signal of the 4th switching tube is opened in the third A period of time is connected between at the time of shutdown moment to the secondary side current for closing pipe is zero or maintains off state, this second The driving signal of switching tube at the time of shutdown moment to secondary side current of the first switch tube is zero between be connected one section Time maintains off state.

13. the control circuit as described in claim 9 or 10, wherein the output voltage gain when the two-way DC converter is greater than Or be equal to one and work in charge mode, which postpones the phase shifting angle for the turn-on instant of the second switch to obtain The turn-on instant of the 5th switching tube is obtained, the driving signal of the 6th switching tube is complementary with the driving signal of the 5th switching tube, The driving signal of 7th switching tube at the time of shutdown moment to primary side current of the 5th switching tube is zero between lead Logical a period of time maintains off state, and the driving signal of the 8th switching tube extremely should at the shutdown moment of the 6th switching tube A period of time is connected between at the time of primary side current is zero or maintains off state, when the output of the two-way DC converter Voltage gain is greater than or equal to one and works in discharge mode, which postpones the turn-on instant of the 8th switching tube The phase shifting angle is to obtain the turn-on instant of the third switching tube, the driving signal of the 4th switching tube and the drive of the third switching tube Dynamic signal is complementary, and the driving signal of the first switch tube is zero in shutdown moment to secondary side current of the third switching tube A period of time is connected between moment or maintains off state, the driving signal of the second switch is in the pass of the 4th switching tube A period of time is connected between at the time of disconnected moment to secondary side current is zero or maintains off state.

14. the control circuit as described in claim 9 or 10, wherein the output voltage gain when the two-way DC converter is greater than Or be equal to one and work in charge mode, which postpones the phase shifting angle for the turn-on instant of the first switch tube to obtain The turn-on instant of the 7th switching tube is obtained, the driving signal of the 8th switching tube is complementary with the driving signal of the 7th switching tube, The driving signal of 5th switching tube at the time of shutdown moment to primary side current of the 7th switching tube is zero between lead Logical a period of time maintains off state, and the driving signal of the 6th switching tube extremely should at the shutdown moment of the 8th switching tube A period of time is connected between at the time of primary side current is zero or maintains off state, when the output of the two-way DC converter Voltage gain is greater than or equal to one and works in discharge mode, which postpones the turn-on instant of the 7th switching tube The phase shifting angle is to obtain the turn-on instant of the first switch tube, the drive of the driving signal and the first switch tube of the second switch Dynamic signal is complementary, and the driving signal of the third switching tube is zero in shutdown moment to secondary side current of the first switch tube A period of time is connected between moment or maintains off state, the driving signal of the 4th switching tube is in the pass of the second switch A period of time is connected between at the time of disconnected moment to secondary side current is zero or maintains off state.

15. control circuit as claimed in claim 9, wherein when two-way DC converter work is in charge mode, this A period of time, the 6th switch is connected in the driving signal of five switching tubes within the time that the voltage of the third node is in high level The driving signal of pipe is in the low level time in the voltage of the third node and a period of time is connected, the drive of the 7th switching tube A period of time, the driving signal of the 8th switching tube is connected in dynamic signal within the time that the voltage of the fourth node is in high level It is in the low level time in the voltage of the fourth node and a period of time is connected, when two-way DC converter work is being discharged When mode, the driving signal of the first switch tube is when the voltage of the first node is in and is connected one section in the time of high level Between, the driving signal of the second switch is in the low level time in the voltage of the first node is connected a period of time, should A period of time is connected in the driving signal of third switching tube within the time that the voltage of the second node is in high level, and the 4th opens The driving signal for closing pipe is in the low level time in the voltage of the second node is connected a period of time.

16. control circuit as described in claim 1, wherein the control circuit also include an input voltage measurement unit, it is one defeated Voltage detection unit and an output electric current measure unit out, the input voltage measurement unit structure is in the detection input voltage and mentions The phase-shift controller is supplied, the output voltage detection unit framework is in the detection output voltage and is supplied to the adjustment module and is somebody's turn to do Phase-shift controller, the output electric current measure unit structure is in the detection output electric current and is supplied to the adjustment module.

17. control circuit as described in claim 1, wherein the resonant cavity of the two-way DC converter includes resonance electricity Sense.

18. control circuit as described in claim 1, wherein the primary side of the resonant cavity includes a primary side inductance, this is humorous The primary side of vibration chamber includes a secondary inductor, and the primary side inductance and the secondary inductor are equivalent to a resonant inductance.

19. control circuit as described in claim 1, wherein the resonant cavity of the two-way DC converter includes resonance electricity Hold.

20. control circuit as described in claim 1, wherein the primary side of the resonant cavity includes a primary lateral capacitance, this is humorous The primary side of vibration chamber includes a grade lateral capacitance, and the primary lateral capacitance and the primary side capacitor equivalent are in a resonant capacitance.

21. control circuit as described in claim 1, wherein the resonant cavity of the two-way DC converter has resonance frequency Rate, the switching frequency are greater than the resonance frequency.

22. control circuit as described in claim 1, wherein the oscillator is a voltage controlled oscillator.

23. a kind of control method, is suitable for a 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 includes Following steps:

Step (a) is generated using an adjustment module according to the output voltage, a reference voltage, the output electric current and a reference current One adjustment signal；

Step (b) is received using an oscillator and generates a switching frequency according to the adjustment signal, and is produced according to the switching frequency A raw first control signal；

Step (c) receives the switching frequency using a phase-shift controller, and obtains one according to the input voltage and the output voltage Phase shifting angle, and a second control signal is generated according to the switching frequency and the phase shifting angle；

Step (d) works when the two-way DC converter in charge mode, is received using a primary side driving circuit and according to this First control signal generate a primary side driving signal, when the two-way DC converter work in discharge mode, utilize the primary side Driving circuit receives and generates the primary side driving signal according to the second control signal, to drive the running of the primary circuit；With And

Step (e) works when the two-way DC converter in charge mode, is received and using a secondary side driving circuit according to this Second control signal generates a secondary side driving signal, when two-way DC converter work is in discharge mode, utilizes the pair side Driving circuit receives and generates the pair side driving signal according to the first control signal, to drive the running of the secondary circuit.

24. control method as claimed in claim 23, wherein when two-way DC converter work is in charge mode, this pair The output voltage is exported to DC converter and this outputs current to an on-vehicle battery, when two-way DC converter work is being put When power mode, which receives the input voltage from the on-vehicle battery.

25. control method as claimed in claim 23, wherein the step (a) includes substep:

Step (a1) generates the output voltage and the reference according to the output voltage and the reference voltage using a first arithmetic device Difference between voltage；And

Step (a2) generates a Voltage loop according to the difference between the output voltage and the reference voltage using a Voltage loop adjuster Adjustment signal.

26. control method as claimed in claim 25, wherein the step (a) also includes substep:

Step (a3) receives using a comparator and compares the Voltage loop adjustment signal and the reference current, produces according to comparison result A raw signal；

Step (a4) is generated between the signal and the output electric current using a second arithmetic device according to the signal and the output electric current Difference；And

Step (a5) generates the adjustment signal according to the difference between the signal and the output electric current using an electric current loop adjuster.

27. control method as claimed in claim 26, wherein the generated signal is the Voltage loop in the step (a3) Adjustment signal or the reference current.

28. control method as claimed in claim 25, wherein the step (a) also includes substep:

Step (a3) generates the output electric current and the reference according to the output electric current and the reference current using a second arithmetic device Difference between electric current；

Step (a4) generates an electric current loop according to the difference between the output electric current and the reference current using an electric current loop adjuster Adjustment signal；And

Step (a5) receives using a comparator and compares the Voltage loop adjustment signal and the electric current loop adjustment signal, and foundation compares As a result the adjustment signal is generated.

29. control method as claimed in claim 28, wherein the generated adjustment signal is the electricity in the step (a5) Pressure ring adjustment signal or the electric current loop adjustment signal.

30. control method as claimed in claim 23, wherein the primary circuit of the two-way DC converter includes parallel with one another One first bridge arm and one second bridge arm of connection, first bridge arm include the first switch tube and one second being connected in series with each other Switching tube, second bridge arm include the third switching tube and one the 4th switching tube being connected in series with each other, wherein the first switch There is a first node, which is electrically connected to one end of the primary side, which opens between pipe and the second switch There is a second node, which is electrically connected to the other end of the primary side, this pair between the 4th switching tube of Guan Guanyu It include the third bridge arm and a four bridge legs being connected in parallel with each other to the secondary circuit of DC converter, which includes One the 5th switching tube being connected in series with each other and one the 6th switching tube, the four bridge legs include that one the 7th be connected in series with each other opens Pipe and one the 8th switching tube are closed, wherein there is between the 5th switching tube and the 6th switching tube a third node, the third section Point is electrically connected to one end of the primary side, has a fourth node between the 7th switching tube and the 8th switching tube, and the 4th Node is electrically connected to the other end of the primary side.

It, should 31. control method as claimed in claim 30 wherein has a primary side current in the primary side of the resonant cavity There is a secondary side current, control circuit also includes a node voltage detection unit, node electricity in the primary side of resonant cavity Press detection unit framework in the detection voltage of the first node, the voltage of the second node, the third node voltage and this The voltage of four nodes is simultaneously supplied to the phase-shift controller, when two-way DC converter work is in charge mode, and it is detected When the voltage of the third node 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 the voltage of the first node detected or the second node When voltage is in failing edge, the primary side current and the secondary side current are zero.

It, should 32. control method as claimed in claim 30 wherein has a primary side current in the primary side of the resonant cavity There is a secondary side current, control circuit also includes a resonant cavity detection unit, resonant cavity inspection in the primary side of resonant cavity Unit structure is surveyed in the detection primary side current and the secondary side current and is supplied to the phase-shift controller.

33. the control method as described in claim 31 or 32, wherein in the step (e), when the two-way DC converter Output voltage gain be greater than or equal to one and work in charge mode, the control circuit by the first switch tube and this second open The turn-on instant for closing pipe postpones the phase shifting angle to obtain the turn-on instant of the 6th switching tube and the 8th switching tube respectively, and the 5th The driving signal of switching tube at the time of shutdown moment to primary side current of the 6th switching tube is zero between be connected one section Time maintains off state, the driving signal of the 7th switching tube the 8th switching tube the shutdown moment to the primary side A period of time is connected between at the time of electric current is zero or maintains off state, in the step (d), 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.

34. the control method as described in claim 31 or 32, wherein in the step (e), when the two-way DC converter Output voltage gain be greater than or equal to one and work in charge mode, the control circuit by the first switch tube and this second open The turn-on instant for closing pipe postpones the phase shifting angle to obtain the turn-on instant of the 7th switching tube and the 5th switching tube respectively, and the 6th The driving signal of switching tube at the time of shutdown moment to primary side current of the 5th switching tube is zero between be connected one section Time maintains off state, the driving signal of the 8th switching tube the 7th switching tube the shutdown moment to the primary side A period of time is connected between at the time of electric current is zero or maintains off state, in the step (d), 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.

35. the control method as described in claim 31 or 32, wherein in the step (e), when the two-way DC converter Output voltage gain be greater than or equal to one and work in charge mode, the control circuit is by the turn-on instant of the second switch Postpone the phase shifting angle to obtain the turn-on instant of the 5th switching tube, the driving signal and the 5th switching tube of the 6th switching tube Driving signal it is complementary, the driving signal of the 7th switching tube is in shutdown moment to primary side current of the 5th switching tube A period of time is connected between at the time of zero or maintains off state, the driving signal of the 8th switching tube is in the 6th switching tube Shutdown moment to the primary side current at the time of be zero between conducting a period of time or maintain off state, in the step (d) in, 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.

36. the control method as described in claim 31 or 32, wherein in the step (e), when the two-way DC converter Output voltage gain be greater than or equal to one and work in charge mode, the control circuit is by the turn-on instant of the first switch tube Postpone the phase shifting angle to obtain the turn-on instant of the 7th switching tube, the driving signal and the 7th switching tube of the 8th switching tube Driving signal it is complementary, the driving signal of the 5th switching tube is in shutdown moment to primary side current of the 7th switching tube A period of time is connected between at the time of zero or maintains off state, the driving signal of the 6th switching tube is in the 8th switching tube Shutdown moment to the primary side current at the time of be zero between conducting a period of time or maintain off state, in the step (d) in, 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.

37. control method as claimed in claim 31, wherein in the step (e), when two-way DC converter work exists When charge mode, the driving signal of the 5th switching tube is connected one section within the time that the voltage of the third node is in high level Time, the driving signal of the 6th switching tube is in the low level time in the voltage of the third node is connected a period of time, The driving signal of 7th switching tube is connected for a period of time within the time that the voltage of the fourth node is in high level, and the 8th The driving signal of switching tube is in the low level time in the voltage of the fourth node and a period of time is connected, in the step (d) In, 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.

38. control method as claimed in claim 23, wherein the resonant cavity of the two-way DC converter has resonance frequency Rate, the switching frequency are greater than the resonance frequency.