CN102263503B - Bidirectional DC/DC (direct current/direct current) control system and working method thereof - Google Patents
Bidirectional DC/DC (direct current/direct current) control system and working method thereof Download PDFInfo
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Abstract
The invention provides bidirectional DC/DC (direct current/direct current) control system which comprises an energy storage device and a conversion circuit, wherein the conversion circuit is connected with a working unit with an energy feedback function. The DC/DC control system also comprises a logic circuit and a control unit, wherein the control unit sends out a control signal CTR, a first control wave signal PWM1 and a second control wave signal PWM2 to the logic circuit; the logic circuit is used for detecting current IL in the conversion circuit and control the conversion circuit according to the current IL, the control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2. By utilizing the technical proposal, the problems of disorder control, imprecise control and low energy transfer efficiency caused by energy countercurrent when two switching tubes are simply used for complementary conduction control in the traditional technical proposal can be overcome, thus the conversion circuit of the system can be effectively controlled, energy flow between the energy storage device and the working unit can be effectively improved and controlled, and the working performance of the motor can be effectively improved.
Description
Technical field
The present invention relates to a kind of DC/DC control system and method for work thereof, relate in particular to two-way DC/DC control system and method for work thereof in a kind of electric motor car.
Background technology
As everyone knows, electric automobile is to drive Vehicle Driving Cycle by motor as the power source of vehicle, and as the energy storage device (electrokinetic cell) that electric energy is provided for motor, also become the indispensable part of electric automobile, communication between the two and energy delivery system have determined whether energy storage device can provide a satisfactory operating voltage and operating current for motor; Simultaneously, electric automobile is in braking or descending, and motor can reclaim the kinetic energy of wheel, thereby is that electric energy is the energy storage device charging with the kinetic transformation of wheel, realizes the feedback of energy.
By the above, between the energy storage device of electric automobile and motor, need to set up the two-way DC/DC control system of a cover, energy transmission between energy storage device and the motor is control effectively, can either satisfy the job requirement of motor, simultaneously can brake or realize during descending feedback utilization to the vehicle excess energy in electric motor car again.
Two-way DC/DC control system in traditional electric motor car comprises a Boost-Buck circuit, this circuit is arranged between the driver of energy storage device and motor, described Boost-Buck circuit is connected with a DPS controller, be specially: comprise two switching tubes and an inductance in this circuit, wherein the control end of two switching tubes is connected with the DPS controller, this DPS controller can send the operating state that two-way PWM control wave is controlled two switching tubes, complementary conducting by two switching tubes realizes that energy storage device is that motor power supply and motor recovery braking energy are two control procedures of energy storage device charging, namely when one of them switching tube closure of control, when another switching tube disconnected, energy storage device was the motor power supply; Otherwise then be that motor is the energy storage device power supply.Also be provided with current sensor in the described circuit and come electric current in the testing circuit, when this Boost-Buck circuit working during in light condition, on-off state can appear in the electric current in the inductance, in the time of namely can appearing at energy storage device and be the motor power supply, electric current in the circuit can be from the energy storage device flow direction motor, this refluence phenomenon can affect original controller to the control of circuit, the duty ratio of the PWM control wave that sends of dsp controller will change in this case, thereby the operating voltage on motor is brought impact, so that energy storage device can not provide an operating voltage that meets the demands for motor, affect the energy transmission efficiency between energy storage device and the motor, and reduced the service behaviour of motor.
Summary of the invention
Purpose of the present invention be intended to solve energy storage device in the prior art and the energy transmission efficiency that has between the working cell of energy feedback low, the problem that the service behaviour of working cell is poor, provide a kind of two-way DC/DC control system effectively to control energy flow between energy storage device and the working cell, the service behaviour of Effective Raise working cell.
A kind of two-way DC/DC control system, described DC/DC control system comprises with an energy storage device and having the change-over circuit that the working cell of energy feedback function is connected, described change-over circuit comprises two branch roads, wherein article one branch road be used for to connect energy storage device positive pole with the working cell and on the direction along energy storage device to the working cell on this branch road, be serially connected with successively inductance L 1, second switch pipe Q2, the second branch road is used for negative pole and the working cell of connection energy storage device;
Described change-over circuit also comprises and is attempted by respectively the first switching tube Q1 between the first branch road and the second branch road, the first capacitor C 1 and the second capacitor C 2, the tie point of described the first switching tube Q1 and the first branch road is between inductance L 1 and second switch pipe Q2, described the first capacitor C 1 is positioned at the end that inductance L 1 is used for being connected energy storage device with the tie point of the first branch road, and described the second capacitor C 2 is positioned at the end that second switch pipe Q2 is used for being connected the working cell with the tie point of the first branch road;
Described DC/DC control system also comprises logical circuit and control unit,
Control unit is used for carrying out communication with energy storage device and working cell, and sends control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 to described logical circuit;
Described logical circuit, for detection of the electric current I L in the change-over circuit, and according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 output be used for control the first switching tube Q1 the 3rd control wave signal PWM11, be used for the 4th control wave signal PWM22 of control second switch pipe Q2 with the work of control change-over circuit.
The present invention also provides a kind of method of work of above-mentioned two-way DC/DC control system, wherein, communication and the CTR that transmits control signal, the first control wave signal PWM1 and the second control wave signal PWM2 are carried out to described logical circuit in control unit and energy storage device and working cell;
Described logical circuit detects the electric current I L in the change-over circuit, and exports for the 3rd control wave signal PWM11 that controls the first switching tube Q1, is used for the 4th control wave signal PWM22 of control second switch pipe Q2 to control the work of change-over circuit according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2.
In the above technical scheme, by in two-way DC/DC control system, a logical circuit being set, undertaken exporting the control wave signal that another group control switch plumber does after the analyzing and processing by the control wave signal of logical circuit with control unit output, overcome the complementary conducting control of two switching tubes of traditional simple usefulness and caused the control disorder that the energy adverse current is brought, the control inaccuracy, the problem that energy transfer efficiency is low, can effectively control translation circuit wherein, Effective Raise the energy flow between control energy storage device and the working cell, and Effective Raise the service behaviour of working cell.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the two-way DC/DC control system of the present invention;
Fig. 2 is that the logical circuit of the two-way DC/DC control system of the present invention is to the logical circuitry of a kind of embodiment of PWM2 processing;
Fig. 3 is that the logical circuit of the two-way DC/DC control system of the present invention is to the logical circuitry of a kind of embodiment of PWM1 processing;
Fig. 4 is the waveform relationship figure of IL, PWM2 and a PWM22 embodiment in the two-way DC/DC control system of the present invention;
Fig. 5 is the waveform relationship figure of IL, PWM1 and a PWM11 embodiment in the two-way DC/DC control system of the present invention;
Fig. 6 is the workflow diagram of the two-way DC/DC control system of the present invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In conjunction with shown in Figure 1, two-way DC/DC control system of the present invention comprises with an energy storage device 1 and having the change-over circuit 2 that the working cell 3 of energy feedback function is connected, described change-over circuit 2 comprises two branch roads, wherein article one branch road be used for to connect energy storage device 1 positive pole with working cell 3 and be serially connected with successively inductance L 1, second switch pipe Q2 on 3 the direction along energy storage device 1 to the working cell on this branch road, the second branch road is used for negative pole and the working cell 3 of connection energy storage device 1.
Described change-over circuit also comprises and is attempted by respectively the first switching tube Q1 between the first branch road and the first branch road, the first capacitor C 1 and the second capacitor C 2, the tie point of described the first switching tube Q1 and the first branch road is between inductance L 1 and second switch pipe Q2, described the first capacitor C 1 is positioned at the end that inductance L 1 is used for being connected energy storage device 1 with the tie point of the first branch road, and described the second capacitor C 2 is positioned at the end that second switch pipe Q2 is used for being connected working cell 3 with the tie point of the first branch road.
Described DC/DC control system also comprises logical circuit 2 and control unit 5,
Described logical circuit 4, for detection of the electric current I L in the change-over circuit 2, and according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 output be used for control the first switching tube Q1 the 3rd control wave signal PWM11, be used for the 4th control wave signal PWM22 of control second switch pipe Q2 with the work of control change-over circuit 2.
Described inductance L 1 can be used for store electrical energy, and when energy storage device 1 was used for powering to described working cell 3, the electric energy of storage discharged in the inductance L 1, be that energy storage device 1 is powered simultaneously.By the energy storage effect of inductance L 1, when energy storage device was the working cell power supply, inductance L 1 can temporarily improve the voltage that energy storage device offers described working cell 3.For example, the maximum voltage that 1 energy of energy storage device provides for working cell 3 is 12V, pass through so the energy storage for power supply of inductance L 1 after, the voltage at 3 two ends, working cell can be risen to 15V.Equally when the excess energy of motor recovery vehicle is used for generating for energy storage device 1 charging, inductance L 1 too can energy storage, after motor was finished charging to energy storage device 1, it was that energy storage device 1 is proceeded charging that the energy in the inductance L 1 can be used as energy for subsequent use.
Described the first capacitor C 1 and the second capacitor C 2 can be carried out filtering to the electric current in the electric current, and can the filtering electric current interchange interference sections of the inside, and the electric current in the circuit is remained in the stable scope.
The control end of described the first switching tube Q1 and second switch pipe Q2 is electrically connected with described logical circuit 4 respectively,
Described the 3rd control wave signal PWM11 controls the work of described the first switching tube Q1; When described PWM11 is 1, described the first switching tube Q1 conducting; When described PWM11 is 0, described the first switching tube Q1 cut-off;
Described the 4th control wave signal PWM22 controls the work of described the first switching tube Q2; When described PWM22 is 1, described the first switching tube Q2 conducting; When described PWM22 is 0, described the first switching tube Q2 cut-off.
As further scheme, also be provided with a current sensor 21 that is electrically connected with described logical circuit 4 between described energy storage device 1 and described inductance L 1, described current sensor 21 is for detection of the electric current I L that flows through inductance L 1 and send this electric current to described logical circuit 4.
Described working cell 3 is for having the working cell of energy feedback function, such as motor etc.Here motor is further described concrete scheme of the present invention and advantage as a kind of embodiment of working cell.
In conjunction with Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, described logical circuit adopts NAND gate circuit, and the 3rd control wave signal PWM11 and the 4th control wave signal PWM22 of final output satisfy logical expression:
CTR is 1 o'clock, and expression energy storage device 1 provides electric energy for working cell 3; CTR is 0 o'clock, and expression working cell 3 control electric power generations are energy storage device 1 charging;
IL is 1 o'clock, and the expression electric current flows to working cell 3 by energy storage device 1; IL is 0 o'clock, and the expression electric current flows to energy storage device 1 by working cell 3;
PWM2 is 1 o'clock, represents that this control signal is high level signal; PWM2 is 0 o'clock, represents that this control signal is low level signal;
PWM1 is 1 o'clock, represents that this control signal is high level signal; PWM1 is 0 o'clock, represents that this control signal is low level signal;
PWM22 is 1 o'clock, represents that this control signal is high level signal; PWM22 is 0 o'clock, represents that this control signal is low level signal;
PWM11 is 1 o'clock, represents that this control signal is high level signal; PWM11 is 0 o'clock, represents that this control signal is low level signal.
Fig. 2 and shown in Figure 3 is the building-block of logic of a kind of embodiment of logical circuit 4.
As a kind of preferred embodiment, logical circuit described in Fig. 2 comprise two not gates, two and door and one or, described control signal CTR by the first not gate U1B be transferred to first with the door U3A on, described electric current I L by the second not gate U1C also be transferred to first with the door U3A on, simultaneously the second waveform signal PWM2 also be sent to this first with door U3A on, namely above-described three signals through first with door U3A after be sent to or door U4A on; Electric current I L and the second control wave signal PWM2 simultaneously through second with the door U2B be delivered to or the door U4A on; Or door U4A has just obtained the 4th control wave signal PWM22 with the signal that receives through logical operation.Namely the 4th control wave signal PWM22 satisfies relational expression:
Its truth table sees Table 1:
Table 1
| CTR | IL | PWM2 | PWM22 |
| 1 | 1 | 1 | 1 |
| 1 | 1 | 0 | 0 |
| 1 | 0 | 1 | 0 |
| 1 | 0 | 0 | 0 |
| 0 | |
1 | 1 |
| 0 | |
0 | 0 |
Can draw in the above form, work as CTR=1, IL=1, during PWM2=1, PWM22=1 is high level; Work as CTR=1, IL=1, during PWM2=0, PWM22=0 is low level; Work as CTR=1, IL=0, during PWM2=1, PWM22=0 is low level; Work as CTR=1, IL=0, during PWM2=0, PWM22=0 is low level; Work as CTR=0, IL=X (no matter being that the value of IL is 1 or 0), during PWM2=1, PWM22=1 is high level; Work as CTR=0, IL=X (no matter being that the value of IL is 1 or 0), during PWM2=0, PWM22=0 is low level.
As a kind of preferred embodiment, logical circuit described in Fig. 2 comprise a not gate U1D, one the 3rd and a door U2C, one the 4th with door U3B and one or a U4B.Electric current I L by not gate U1D send to the 3rd with a door U2C, simultaneously the second control wave signal PWM2 also send to the 3rd with a door U2C, the 3rd carries out the signal that receives to send to or door U4B after the logical operation with door U2C; Control signal CTR, electric current I L and the first control wave signal PWM1 send to the 4th with a door U3B, carry out sending to or door U4B after the logical operation with a door U3B through the 4th; Or door U4B has just obtained the 3rd control wave signal shape signal PWM11 with the signal that receives through logical operation.Namely the 3rd control wave signal PWM11 satisfies relational expression:
Its truth table sees Table 2:
Table 2
| CTR | IL | PWM1 | PWM11 |
| 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 1 |
| 0 | 1 | 0 | 0 |
| 0 | 1 | 1 | 0 |
| 1 | |
1 | 1 |
| 1 | |
0 | 0 |
Can draw in the above form, work as CTR=0, IL=0, during PWM1=0, PWM11=0 is low level; Work as CTR=0, IL=0, during PWM1=1, PWM11=1 is high level; Work as CTR=0, IL=1, during PWM1=0, PWM11=0 is low level; Work as CTR=0, IL=1, during PWM1=1, PWM11=0 is low level; Work as CTR=0, IL=X (no matter being that the value of IL is 1 or 0), during PWM1=1, PWM11=1 is high level; Work as CTR=0, IL=X (no matter being that the value of IL is 1 or 0), during PWM1=0, PWM11=0 is low level.
Corresponding, as shown in Figure 4, namely when CTR is 1, electric current I L, the second control wave signal PWM2, oscillogram corresponding to the 4th control wave signal PWM22, this figure has comprised electric current I L, the second control wave signal PWM2 and oscillogram corresponding to the 4th control wave signal PWM22 in five intervals (0-t1, t1-t2, t2-t3, t3-t4, t4-t5); Shown in Figure 5, namely when CTR is, electric current I L, the first control wave signal PWM2 and oscillogram corresponding to the 3rd control wave signal PWM11, this figure also is divided into five intervals.
In the above technical scheme, described the first switching tube Q1 and second switch Q2 are preferably igbt transistor or metal-oxide-semiconductor.Described control unit is preferably the DSP control chip that model is TI2812.
The below describes the method for work of this two-way DC/DC control system in detail:
Described logical circuit 4 is also for detection of the electric current I L in the change-over circuit 2, and according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 output be used for control the first switching tube Q1 the 3rd control wave signal PWM11, be used for the 4th control wave signal PWM22 of control second switch pipe Q2 with the work of control change-over circuit 2.
When system starts working, at first control unit 5 carries out communication with energy storage device 1 and working cell 3, judgement is that energy storage device 1 is powered for working cell 3 or the working cell is the energy storage device charging, and send a control signal CTR to logical circuit 4, the value of CTR is 1 o'clock, show that vehicle needs to start, motor needs work, and energy storage device 1 need to be to working cell 3 power supplies; CTR is 0 o'clock, and when showing car brakeing or descending, the energy that vehicle need to be reclaimed in the working cell is energy storage device 1 charging.
Then control unit sends the first control wave signal PWM1, the second control wave signal PWM2 to described logical circuit 4.
Logical circuit 4 carries out further work according to the electric current I L in the change-over circuit 2 that detects, the first control wave signal PWM1, the second control wave signal PWM2 and control signal CTR.
A kind of embodiment of the present invention, when described working cell was motor, as shown in Figure 6, step 1 judged whether CTR is 1;
When CTR=1, this moment, energy storage device 1 was working cell 3 power supplies;
When CTR=0, electric power generation is energy storage device 1 charging.
Step 2 is when CTR=1;
If IL=1, PWM2=0 and PWM1=1, then the 3rd control wave signal PWM11=1 of logical circuit 4 final outputs is a high level signal; The 4th control wave signal PWM22=0 that exports is a low level signal; Two paths of signals is just controlled respectively the first switching tube Q1 conducting, control second switch pipe Q2 cut-off, and energy storage device 1 is inductance L 1 power supply, inductance L 1 energy storage; System returns step 1.
If IL=1, PWM2=1 and PWM1=0, then the 3rd control wave signal PWM11=0 of logical circuit 4 final outputs is a low level signal; The 4th control wave signal PWM22=1 that exports is a high level signal; Two paths of signals is just controlled respectively the first switching tube Q1 cut-off, control second switch pipe Q2 conducting, energy storage device 1 is working cell 3 power supplies, thereby inductance L 1 also discharges the energy of storing in the inductance L 1 for the working cell power supply simultaneously, will effectively raise the voltage at two ends, working cell like this, can effectively utilize a lower energy storage device 1 of voltage ratio to satisfy the demand of working cell, effectively reduce the weight of vehicle; System returns step 1.
If IL=0, PWM2=0 and PWM1=1, then the 3rd control wave signal PWM11=1 of logical circuit 4 final outputs is a high level signal; The 4th control wave signal PWM22=0 that exports is a low level signal; Two paths of signals is just controlled respectively the first switching tube Q1 conducting, control second switch pipe Q2 cut-off, and energy storage device 1 is again inductance L 1 power supply, inductance L 1 energy storage; System returns step 1.
If IL=0, PWM2=1 and PWM1=0, then the 3rd control wave signal PWM11=0 of logical circuit 4 final outputs is a low level signal; The 4th control wave signal PWM22=0 that exports is a low level signal; Two paths of signals is just controlled respectively the first switching tube Q1 cut-off, control second switch pipe Q2 conducting, and energy storage device 1 namely is not that working cell 3 power supplies are not again inductance L 1 power supply energy storage, this stage is a transition stage.Then system returns step 1.
By above control program, when energy storage device 1 is powered for working cell 3, can effectively prevent counter the pouring in inductance L 1 or the energy storage device 1 of electric energy that working cell 3 produces, bring the adverse effect to control, can effectively control the energy flow between energy storage device and the motor, the service behaviour of Effective Raise motor.
If IL=1, PWM2=0 and PWM1=1, then the 3rd control wave signal PWM11=0 of logical circuit 4 final outputs is a low level signal; The 4th control wave signal PWM22=0 that exports is a low level signal; Two paths of signals is just controlled respectively the first switching tube Q1 cut-off, control second switch pipe Q2 cut-off, although the motor generating, be not inductance L 1 power supply this moment, is not energy storage device 1 charging yet; Then system returns step 1.
If IL=1, PWM2=1 and PWM1=0, then the 3rd control wave signal PWM11=0 of logical circuit 4 final outputs is a low level signal; The 4th control wave signal PWM22=1 that exports is a high level signal; Two paths of signals is just controlled respectively the first switching tube Q1 cut-off, control second switch pipe Q2 conducting, and this moment, motor reclaimed the braking energy generating, for energy storage device 1 charging, was inductance L 1 energy storage simultaneously.Then system returns step 1.
If IL=0, PWM2=0 and PWM1=1, then the 3rd control wave signal PWM11=1 of logical circuit 4 final outputs is a high level signal; The 4th control wave signal PWM22=0 that exports is a low level signal; Two paths of signals is just controlled respectively the first switching tube Q 1 conducting, control second switch pipe Q2 cut-off, it is energy storage device 1 charging that the inner energy of storing of inductance L 1 release this moment comes, Effective Raise motor send out the p electrical efficiency, be the same electric energy of battery storage, only need to use the relatively little motor of power just can realize, Effective Raise the operating efficiency of motor, reduced simultaneously cost.Then system returns step 1.
If IL=0, PWM2=1 and PWM1=0, then the 3rd control wave signal PWM11=0 of logical circuit 4 final outputs is a low level signal; The 4th control wave signal PWM22=1 that exports is a high level signal; Two paths of signals is just controlled respectively the first switching tube Q1 cut-off, control second switch pipe Q2 conducting, and motor charges for energy storage device 1 again and is simultaneously inductance L 1 energy storage at this moment.Then system returns step 1.
Above-described several step alternate cycles is carried out, when inductance L 1 continues charging for energy storage device 1 until the energy in the inductance L 1 discharges complete electric current when being zero, can prevent effectively that by above step the electric energy of energy storage device 1 from flowing into again the control disorder that inductance L 1 is brought for inductance L 1 charging, also can effectively control the energy flow between energy storage device and the motor, the service behaviour of Effective Raise motor.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. two-way DC/DC control system, described DC/DC control system comprises with an energy storage device (1) and having the change-over circuit (2) that the working cell (3) of energy feedback function is connected, described change-over circuit (2) comprises two branch roads, wherein the first branch road positive pole of be used for connecting energy storage device (1) and working cell (3) and be serially connected with successively inductance L 1, second switch pipe Q2 on along energy storage device (1) to the direction of working cell (3) on this branch road, the second branch road is for negative pole and working cell (3) of connection energy storage device (1);
Described change-over circuit also comprises and is attempted by respectively the first switching tube Q1 between the first branch road and the second branch road, the first capacitor C 1 and the second capacitor C 2, the tie point of described the first switching tube Q1 and the first branch road is between inductance L 1 and second switch pipe Q2, described the first capacitor C 1 is positioned at the end that inductance L 1 is used for being connected energy storage device (1) with the tie point of the first branch road, and described the second capacitor C 2 is positioned at the end that second switch pipe Q2 is used for being connected working cell (3) with the tie point of the first branch road;
It is characterized in that described DC/DC control system also comprises logical circuit (4) and control unit (5),
Control unit (5) is used for carrying out communication with energy storage device (1) and working cell (3), and sends control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 to described logical circuit;
Described logical circuit (4), for detection of the electric current I L in the change-over circuit (2), and according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 output be used for control the first switching tube Q1 the 3rd control wave signal PWM11, be used for the 4th control wave signal PWM22 of control second switch pipe Q2 with the work of control change-over circuit (2), and the 3rd control wave signal PWM11 and the 4th control wave signal PWM22 of final output satisfy logical expression:
2. two-way DC/DC control system according to claim 1 is characterized in that, described logical circuit (4) is the NAND gate logical circuit.
3. two-way DC/DC control system according to claim 2 is characterized in that, the control end of described the first switching tube Q1 and second switch pipe Q2 is electrically connected with described logical circuit (4) respectively,
Described the 3rd control wave signal PWM11 controls the work of described the first switching tube Q1; When described PWM11 is 1, described the first switching tube Q1 conducting; When described PWM11 is 0, described the first switching tube Q1 cut-off;
Described the 4th control wave signal PWM22 controls the work of described the first switching tube Q2; When described PWM22 is 1, described the first switching tube Q2 conducting; When described PWM22 is 0, described the first switching tube Q2 cut-off.
4. two-way DC/DC control system according to claim 1, it is characterized in that, also be provided with a current sensor (21) that is electrically connected with described logical circuit (4) between described energy storage device (1) and described inductance L 1, described current sensor (21) is for detection of the electric current I L that flows through inductance L 1 and send this electric current to described logical circuit (4).
5. two-way DC/DC control system according to claim 1 is characterized in that, described the first switching tube Q1 and second switch pipe Q2 are igbt transistor or metal-oxide-semiconductor.
6. two-way DC/DC control system according to claim 1 is characterized in that, described control unit (5) is the DSP control chip of TI2812 for model.
7. the method for work of a two-way DC/DC control system, described DC/DC control system comprises with an energy storage device (1) and having the change-over circuit (2) that the working cell (3) of energy feedback function is connected, described change-over circuit (2) comprises two branch roads, wherein article one branch road be used for to connect the positive pole of energy storage device (1) and working cell (3) and is being serially connected with successively inductance L 1 on along energy storage device (1) to the direction of working cell (3) on this branch road, second switch pipe Q2, the second branch road is used for connecting negative pole and working cell (3) of energy storage device (1);
Described change-over circuit also comprises and is attempted by respectively the first switching tube Q1 between the first branch road and the second branch road, the first capacitor C 1 and the second capacitor C 2, the tie point of described the first switching tube Q1 and the first branch road is between inductance L 1 and second switch pipe Q2, described the first capacitor C 1 is positioned at the end that inductance L 1 is used for being connected energy storage device (1) with the tie point of the first branch road, and described the second capacitor C 2 is positioned at the end that second switch pipe Q2 is used for being connected working cell (3) with the tie point of the first branch road;
Also comprise the logical circuit (4) that is electrically connected with change-over circuit (2) and the control unit (5) that is electrically connected with logical circuit (4), wherein,
Control unit (5) carries out communication and the CTR that transmits control signal, the first control wave signal PWM1 and the second control wave signal PWM2 to described logical circuit (4) with energy storage device (1) and working cell (3);
Described logical circuit (4) detects the electric current I L in the change-over circuit (2), and according to described electric current I L, control signal CTR, the first control wave signal PWM1 and the second control wave signal PWM2 output be used for control the first switching tube Q1 the 3rd control wave signal PWM11, be used for the 4th control wave signal PWM22 of control second switch pipe Q2 with the work of control change-over circuit (2), wherein, described method of work is further comprising the steps of:
Step 1, the value of judgement control signal CTR;
Control the work of the first switching tube Q1 and second switch pipe Q2 according to the judged result of step 1 and electric current I L, the first control wave signal PWM1 and the second control wave signal PWM2, wherein, described control signal CTR, electric current I L, the first control wave signal PWM1, the second control wave signal PWM2, the 3rd control wave signal PWM11 and the 4th control wave signal PWM22 satisfy condition:
8. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=1, IL=1, PWM2=0 and PWM1=1, controls the first switching tube Q1 conducting, second switch pipe Q2 cut-off; And return step 1.
9. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=1, IL=1, PWM2=1 and PWM1=0, controls the first switching tube Q1 cut-off, second switch pipe Q2 conducting; And return step 1.
10. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=1, IL=0, PWM2=0 and PWM1=1, controls the first switching tube Q1 conducting, second switch pipe Q2 cut-off; And return step 1.
11. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=1, IL=0, PWM2=1 and PWM1=0, controls the first switching tube Q1 cut-off, second switch pipe Q2 cut-off; And return step 1.
12. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=0, IL=1, PWM2=0 and PWM1=1, controls the first switching tube Q1 cut-off, second switch pipe Q2 cut-off; And return step 1.
13. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=0, IL=1, PWM2=1 and PWM1=0, controls the first switching tube Q1 cut-off, second switch pipe Q2 conducting; And return step 1.
14. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=0, IL=0, PWM2=0 and PWM1=1, controls the first switching tube Q1 conducting, second switch pipe Q2 cut-off; And return step 1.
15. the method for work of two-way DC/DC control system according to claim 7 is characterized in that, when CTR=0, IL=0, PWM2=1 and PWM1=0, controls the first switching tube Q1 cut-off, second switch pipe Q2 conducting; And return step 1.
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| CN103166276A (en) * | 2011-12-19 | 2013-06-19 | 深圳市沃特玛电池有限公司 | Power protection and conversion circuit |
| CN103378728A (en) * | 2012-04-24 | 2013-10-30 | 比亚迪股份有限公司 | DC/DC for dual-direction constant voltage and method for controlling dual-direction constant voltage |
| CN102694468A (en) * | 2012-05-22 | 2012-09-26 | 奇瑞汽车股份有限公司 | Control method for bidirectional power supply conversion |
| CN103731061A (en) * | 2012-10-10 | 2014-04-16 | 江苏固德威电源科技有限公司 | Both-way energy storing inverter topological structure |
| CN102931849A (en) * | 2012-11-26 | 2013-02-13 | 宁德时代新能源科技有限公司 | Bidirectional DC (direct current)/DC conversion device |
| CN103171452A (en) * | 2013-04-09 | 2013-06-26 | 上海电机学院 | Dual-power supply management system and dual-power supply management method for electric vehicle |
| CN103516213B (en) * | 2013-09-09 | 2016-08-31 | 深圳市佳华利道新技术开发有限公司 | Bidirectional DC-DC converter circuit control system and hybrid motor vehicle |
| CN103532379A (en) * | 2013-09-09 | 2014-01-22 | 深圳市佳华利道新技术开发有限公司 | Bidirectional DC-DC converter and hybrid electric vehicle |
| CN105098863B (en) * | 2014-05-22 | 2018-06-26 | 上海汽车集团股份有限公司 | Cell apparatus, driving device, the control method of drive system and drive system |
| CN105896963B (en) * | 2014-09-30 | 2018-11-27 | 杭州硅星科技有限公司 | A kind of electric power controller and its energy reclaiming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355260A (en) * | 2008-09-17 | 2009-01-28 | 中国航天时代电子公司第七七一研究所 | Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof |
| CN101640476A (en) * | 2009-03-25 | 2010-02-03 | 杭州矽力杰半导体技术有限公司 | Power regulator and control method thereof |
-
2010
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355260A (en) * | 2008-09-17 | 2009-01-28 | 中国航天时代电子公司第七七一研究所 | Transformation controller for charging and discharging lithium ion accumulator as well as transformation control method thereof |
| CN101640476A (en) * | 2009-03-25 | 2010-02-03 | 杭州矽力杰半导体技术有限公司 | Power regulator and control method thereof |
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