CN206364703U - High-power DC/DC converter system - Google Patents
High-power DC/DC converter system Download PDFInfo
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- CN206364703U CN206364703U CN201621271475.5U CN201621271475U CN206364703U CN 206364703 U CN206364703 U CN 206364703U CN 201621271475 U CN201621271475 U CN 201621271475U CN 206364703 U CN206364703 U CN 206364703U
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Abstract
The utility model is related to high-power DC/DC converter system, belong to dcdc converter field, including input starting module, IGBT module, drive module, fly-wheel diode, LC filter circuits, control system, voltage sampling circuit, current sampling circuit and display and communication module；The control system includes high input voltage judge module, output voltage judge module and output current judge module；The high input voltage judge module judges whether input high pressure is in normal range of operation, the output voltage judge module judges whether output voltage reaches output voltage rated value, the output current judge module receives the real-time value signal of output current and judges whether output current instantaneous value reaches real-time current limit threshold, the control system is according to the comparative result of high input voltage judge module and output voltage judge module and output current judge module to drive module output signal, and drive module exports respective drive signal to IGBT module.
Description
Technical field
The utility model is related to dcdc converter field, more particularly to high-power DC/DC converter system.
Background technology
Dcdc converter utilizes the on-off action of power semiconductor device, adjusts output voltage, and it reconciles precision height, dynamic
Response is fast, saves electric energy.
It is typically directly to add DC high voltage without any processing, this can draw for DC/DC converters conventional at present
The dash current of moment is played, especially for high-power charger, its extent of injury to electrical device is very high, and this is just needed
Make equipment current peak when upper electric start from scratch it is slow rise, reduce dash current.
The way of traditional dcdc converter is current-limiting resistance plus relay (or controllable silicon) combination, and the shortcoming of the way is not
It can realize that electric current gradually increases from zero, then for high-power DC/DC converter (such as more than 40Kw), still exist larger
Impact, and in order to reduce infringement of the impact to device, the capacity of each component need to be increased, substantially more than 2 times, such case
Under, the loss of start-up course current-limiting resistance is big, and heating is serious；When dcdc converter is frequent powered up, dcdc converter will be continuously more
Task is in starting state, and current-limiting resistance is more serious by heating, dcdc converter is produced failure.
Utility model content
In order to solve the above problems, the utility model provides a kind of high-power DC/DC converter system, solves existing
To reduce infringement of the rush of current to device in technology, current-limiting resistance fever phenomenon caused by the capacity of each component is increased
Seriously, dcdc converter is also easy to produce the defect of failure.
The utility model realizes above-mentioned purpose using following technical scheme：
High-power DC/DC converter system, including input starting module, IGBT module, drive module, fly-wheel diode, LC
Filter circuit, control system, voltage sampling circuit, current sampling circuit and display and communication module；The control system includes
High input voltage judge module, output voltage judge module and output current judge module；The input starting module access high pressure
Input, input starting module is connected with the high input voltage judge module in the C1 terminals and control system of IGBT module respectively, institute
The E1 ends for stating IGBT module are connected with fly-wheel diode and LC filter circuits respectively, the other end and the drive module phase of IGBT module
Even, the drive module is connected with control system, and the LC filter circuits connect voltage sampling circuit and current sampling circuit respectively,
The output voltage judge module and output current of the voltage sampling circuit and current sampling circuit also respectively with control system are sentenced
Disconnected module is connected, and the control system is connected with the display and communication module, and the LC filter circuits are connected with load；It is described
Inputting starting module includes resistance, controllable silicon and input capacitance, and one end of the resistance is extremely connected with controllable silicon A, the other end and
Controllable silicon K poles and input capacitance Ci are connected.
The high input voltage judge module judges whether input high pressure is in normal range of operation, and the output voltage judges
Module judges whether output voltage reaches output voltage rated value, and the output current judge module receives output current instantaneous value
Signal simultaneously judges whether output current instantaneous value reaches real-time current limit threshold, and the control system is according to high input voltage judge module
With the comparative result of output voltage judge module and output current judge module to drive module output signal, drive module to
IGBT module exports respective drive signal.
The chip model of the control system is UC2844；
The chip model of the drive module is 2SD106AI-17；
The model 2MBI450VH-120-50 of the IGBT module；
The model LV25-P of voltage sensor in the voltage sampling circuit；
The utility model also provides the control method using high-power DC/DC converter system, comprises the following steps：
S1：During original state, default high input voltage normal operating value scope and output voltage rated value；
S2：High input voltage is accessed, after the t0 periods, the high input voltage judge module of control system judges that high input voltage is
It is no in the range of normal operating value；If so, step S4 is performed, if it is not, then performing step S3；
S3：Drive signal is forbidden in control system output, and IGBT cut-offs, no output, system does not work；
S4：Input starting module and connect high input voltage, it is defeated that output voltage judge module receiving voltage sample circuit feeds back
Go out voltage signal, and judge whether output voltage reaches rated value；If so, step S7 is performed, if it is not, then performing step S5；
S5：Output current judge module receives the real-time value signal of output current of current sampling circuit feedback, control system
According to the real-time value signal of output current, the threshold value of electric current peak values in real time is gradually tuned up, the dutycycle of drive signal is become larger,
IGBT module is opened, output current instantaneous value is gradually increased continuously, and ensures that electric current peak values in real time is no more than real-time current limiting threshold
Value, performs step S6；
S6：Output voltage judge module judges whether output voltage reaches rated value；If so, step S7 is performed, if it is not, holding
Row step S5；
S7：Stop the increase of electric current peak values in real time threshold value, terminate start-up course.
After the t0 moment, output current, which increases, to be represented by：
I=at (1)
Wherein, I is output current, and t is the time, and a is constant.
Compared with prior art, the beneficial effects of the utility model are, filling greatly when the system effectively prevent electric
Electric surge impact electric current is to component, and the damage particularly to IGBT module prevents the failure propagation of circuit, reduce hardware into
This, improves system reliability, while the changing rule by adjusting dutycycle, can be to output current size and voltage swing
It is adjusted, reaches required starting characteristic.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model high-power DC/DC converter system；
Fig. 2 is the module frame chart of the utility model control system；
Fig. 3 is control method flow chart of the present utility model；
Fig. 4 is task driven oscillogram of the present utility model.
Embodiment
The utility model is described in further detail with reference to embodiment and accompanying drawing.
As shown in figure 1, high-power DC/DC converter system of the present utility model, including input starting module, IGBT module,
Drive module, fly-wheel diode, LC filter circuits, control system, voltage sampling circuit, current sampling circuit and display and communication
Module；Control system includes high input voltage judge module, output voltage judge module and output current judge module；Input starts
Module accesses high input voltage, and input starting module judges with the high input voltage in the C1 terminals and control system of IGBT module respectively
Module is connected, and the E1 ends of IGBT module are connected with fly-wheel diode and LC filter circuits respectively, the other end of IGBT module and drive
Dynamic model block is connected, and drive module is connected with control system, and LC filter circuits connect voltage sampling circuit and current sampling circuit respectively,
The output voltage judge module and output current of voltage sampling circuit and current sampling circuit also respectively with control system judge mould
Block is connected, and control system is connected with display and communication module, and LC filter circuits are connected with load；Inputting starting module includes electricity
Resistance, controllable silicon and input capacitance, one end of resistance are extremely connected with controllable silicon A, the other end and controllable silicon K poles and input capacitance Ci phases
Even.
As shown in Fig. 2 high input voltage judge module judges whether input high pressure is in normal range of operation, output voltage is sentenced
Disconnected module judges whether output voltage reaches output voltage rated value, and output current judge module receives output current instantaneous value letter
Number and judge whether output current instantaneous value reaches real-time current limit threshold, control system is according to high input voltage judge module and output
The comparative result of voltage judge module and output current judge module is to drive module output signal, and drive module is to IGBT module
Export respective drive signal.
In the present embodiment, the chip of control system uses UC2844, and the chip of drive module uses 2SD106AI-17,
IGBT module uses voltage sensor in 2MBI450VH-120-50, voltage sampling circuit to use LV25-P.
As shown in figure 3, being the control method of high-power DC/DC converter of the present utility model, comprise the following steps：
S1：During original state, default high input voltage normal operating value scope and output voltage rated value；
The working value scope that the present embodiment sets each technical parameter is as follows,
| Technical parameter | Numerical value |
| High input voltage normal operating value | (300-900)Vd.c |
| Output voltage rated value | 110Vd.c |
S2：High input voltage is accessed, after the t0 periods, the high input voltage judge module of control system judges that high input voltage is
It is no in normal operating value scope (300-900) Vd.c；If so, step S4 is performed, if it is not, then performing step S3；
S3：Drive signal is forbidden in control system output, and IGBT cut-offs, no output, system does not work；
S4：Input starting module and connect high input voltage, it is defeated that output voltage judge module receiving voltage sample circuit feeds back
Go out voltage signal, and judge whether output voltage reaches rated value 110Vd.c；If so, step S7 is performed, if it is not, then performing step
Rapid S5；
S5：Output current judge module receives the output current peak values in real time signal of current sampling circuit feedback, control system
System gradually tunes up the threshold value of electric current peak values in real time, the dutycycle of drive signal is gradually become according to the real-time value signal of output current
Greatly, IGBT module is opened, as shown in figure 4, making output current instantaneous value gradually increase continuously, and ensures that electric current peak values in real time does not surpass
Real-time current limit threshold is crossed, step S6 is performed；
S6：Output voltage judge module judges whether output voltage reaches rated value；If so, step S7 is performed, if it is not, holding
Row step S5；
S7：Stop the increase of electric current peak values in real time threshold value, terminate start-up course.
As shown in figure 4, after the t0 moment, output current, which increases, to be represented by：
I=at (1)
Wherein, I is output current, and t is the time, and a is constant.
Load in the present embodiment is high capacity cell, and it is I1=300A to reach electric current during rated output voltage, according to
High-power DC/DC converter characteristic, sets a as 60, then used time t=5s.
As shown in figure 1, the input starting module that the present embodiment is used is after access high-tension electricity, first by resistance to electric capacity
Ci charges, when high input voltage judge module detection high-tension electricity is normal (i.e. A, K both end voltage are equal and in normal range of operation)
Afterwards, i.e. resistance R short circuits are inputted start completion by triggering controlled silicon conducting.Input capacitance Ci buffering chargings, generate less than 1A arteries and veins
Electric current is rushed, as shown in figure 4, the electric current that the start-up course is produced is shown in 0 to the waveform between t0.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within right of the present utility model.Separately
Outside, the technical characteristic in each embodiment of the utility model may be used alone, can also be used in combination.
Claims (6)
1. high-power DC/DC converter system, it is characterised in that including input starting module, IGBT module, drive module, afterflow
Diode, LC filter circuits, control system, voltage sampling circuit, current sampling circuit and display and communication module；The control
System includes high input voltage judge module, output voltage judge module and output current judge module；The input starting module
Access high input voltage, input starting module respectively with the high input voltage judge module in the C1 terminals and control system of IGBT module
It is connected, the E1 ends of the IGBT module are connected with fly-wheel diode and LC filter circuits respectively, the other end of IGBT module and drive
Dynamic model block is connected, and the drive module is connected with control system, and the LC filter circuits connect voltage sampling circuit and electric current respectively
Sample circuit, the voltage sampling circuit and current sampling circuit also respectively with the output voltage judge module of control system and defeated
Go out electric current judge module to be connected, the control system is connected with the display and communication module, the LC filter circuits and load
It is connected；The input starting module includes resistance, controllable silicon and input capacitance, and one end of the resistance is extremely connected with controllable silicon A,
The other end is connected with controllable silicon K poles and input capacitance Ci.
2. high-power DC/DC converter system according to claim 1, it is characterised in that：The high input voltage judge module
Judge whether input high pressure is in normal range of operation, the output voltage judge module judges whether output voltage reaches output
Voltage rating, the output current judge module receives the real-time value signal of output current and whether judges output current instantaneous value
Real-time current limit threshold is reached, the control system is according to high input voltage judge module and output voltage judge module and output current
The comparative result of judge module exports respective drive signal to drive module output signal, drive module to IGBT module.
3. high-power DC/DC converter system according to claim 1, it is characterised in that the control system it is chip-shaped
Number be UC2844.
4. high-power DC/DC converter system according to claim 1, it is characterised in that the drive module it is chip-shaped
Number be 2SD106AI-17.
5. high-power DC/DC converter system according to claim 1, it is characterised in that the model of the IGBT module
2MBI450VH-120-50。
6. high-power DC/DC converter system according to claim 1, it is characterised in that electric in the voltage sampling circuit
The model LV25-P of pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271475.5U CN206364703U (en) | 2016-11-25 | 2016-11-25 | High-power DC/DC converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271475.5U CN206364703U (en) | 2016-11-25 | 2016-11-25 | High-power DC/DC converter system |
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| Publication Number | Publication Date |
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| CN206364703U true CN206364703U (en) | 2017-07-28 |
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| CN201621271475.5U Active CN206364703U (en) | 2016-11-25 | 2016-11-25 | High-power DC/DC converter system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549574A (en) * | 2016-11-25 | 2017-03-29 | 沈阳新阳光机电科技有限公司 | High-power DC/DC converter system and its control method |
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2016
- 2016-11-25 CN CN201621271475.5U patent/CN206364703U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549574A (en) * | 2016-11-25 | 2017-03-29 | 沈阳新阳光机电科技有限公司 | High-power DC/DC converter system and its control method |
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