CN106505848A - The start-stop control system of great power bidirectional full-bridge DC DC changers and method - Google Patents
The start-stop control system of great power bidirectional full-bridge DC DC changers and method Download PDFInfo
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- CN106505848A CN106505848A CN201611107813.6A CN201611107813A CN106505848A CN 106505848 A CN106505848 A CN 106505848A CN 201611107813 A CN201611107813 A CN 201611107813A CN 106505848 A CN106505848 A CN 106505848A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of start-stop control system of great power bidirectional full-bridge DC DC changers and method; the system includes that two-way full-bridge DC DC changers, signal condition are produced and drive module, protection module, CPLD, single-chip microcomputer and control station with limit monitoring modular, PWM is crossed; the signal condition is connected with two-way full-bridge DC DC changers with the input for crossing limit monitoring modular, and outfan is connected with CPLD and single-chip microcomputer respectively；The outfan of the CPLD is produced with PWM respectively and is connected with the input of drive module and protection module；The PWM is produced and is connected with two-way full-bridge DC DC changers with the outfan of drive module and protection module；It is connected by communication bus between the single-chip microcomputer and CPLD, single-chip microcomputer is connected with control station also by SPI communication bus.The present invention adopts two-way full-bridge DC DC changers, combines to ensure systematic steady state reliability service using the digital-to-analogue of CPLD and single-chip microcomputer.
Description
Technical field
The present invention relates to a kind of start-stop control system of DC-DC converter and method, especially a kind of great power bidirectional is complete
The start-stop control system of bridge DC-DC converter and method, belong to switch converters field.
Background technology
As country proposes further requirement to energy consumption, in many quadrant jobs systems can realize the storage of energy and release
The two-way full-bridge DC-DC converter that puts receives extensive favor and approves.But DC-DC converter is high frequency switching converter device,
The work of system easily be subject to electromagnetic interference, system cannot ensure when being interfered and breaking down system reliably can stop or
Person is reliably to recover again.And, in high-power place, the start and stop of system can also cause the mutation of voltage and current, may
System can be caused is operated so that system overload works repeatedly.Further, two-way full-bridge DC-DC converter is two-way
It is increasingly complex that job specification also causes the startup of two-way full-bridge DC-DC converter to control.
After pertinent literature is consulted, most of switching on/off circuit for great power bidirectional full-bridge DC-DC converter still stops
Stay in soft starting mode, and soft start is directed to as if main topology soft start, for occurring in system start-up
A kind of reliable Starting mode processed by various problems.
Content of the invention
The invention aims to solving the defect of above-mentioned prior art, there is provided a kind of great power bidirectional full-bridge DC-
The start-stop control system of DC changers, the system adopt two-way full-bridge DC-DC converter, are tied using the digital-to-analogue of CPLD and single-chip microcomputer
Close to ensure systematic steady state reliability service.
Another object of the present invention is to providing a kind of great power bidirectional full-bridge DC-DC converter based on said system
On off control method.
The purpose of the present invention can be reached by adopting the following technical scheme that：
The start-stop control system of great power bidirectional full-bridge DC-DC converter, including two-way full-bridge DC-DC converter, signal
Conditioning is produced and drive module, protection module, CPLD, single-chip microcomputer and control station with limit monitoring modular, PWM is crossed, the signal
Nurse one's health with cross limit monitoring modular input be connected with two-way full-bridge DC-DC converter, outfan respectively with CPLD and single-chip microcomputer
It is connected；The outfan of the CPLD is produced with PWM respectively and is connected with the input of drive module and protection module；The PWM is produced
Life is connected with two-way full-bridge DC-DC converter with the outfan of drive module and protection module；Between the single-chip microcomputer and CPLD
It is connected by communication bus, single-chip microcomputer is connected with control station also by SPI communication bus.
Used as a kind of preferred version, the two-way full-bridge DC-DC converter includes four IGBT modules and a transformator,
Two of which IGBT module is connected with the high-pressure side of transformator, used as blood pressure lowering IGBT modules, two other IGBT module and transformation
The low-pressure end connection of device, used as boosting IGBT modules.
Used as a kind of preferred version, four IGBT modules adopt half-bridge module SKM50GB12T4.
Used as a kind of preferred version, the PWM is produced includes buck PWM controller and boosting PWM controls with drive module
Device.
As a kind of preferred version, UC3825 chip of the buck PWM controller using T1 companies, the boosting PWM
UC3875 chip of the controller using T1 companies.
Used as a kind of preferred version, the protection module includes multiple overvoltage crowbars and multiple start and stop protection circuits.
Used as a kind of preferred version, the overvoltage crowbar includes single limit comparator and first resistor, single limit ratio
Compared with the input termination super-capacitor voltage of device, outfan is connected with first resistor；The start and stop protection circuit include stagnant chain rate compared with
Device, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and diode, the input of the hysteresis comparator pass through second
Resistance connects super-capacitor voltage, and outfan is connected with the 4th resistance by 3rd resistor, the positive pole of the diode and stagnant chain rate
Connect compared with the outfan of device, negative pole is connected with the input of hysteresis comparator by the 5th resistance.
Used as a kind of preferred version, single-chip microcomputer of the single-chip microcomputer using TI companies model MSP430F5438 is described
CPLD adopts altera corp's model 5M160ZE64；The single-chip microcomputer and CPLD carry out logic level using 7 logical I/Os
One-way communication, realizes the information exchange of whole system.
Another object of the present invention can be reached by adopting the following technical scheme that：
The on off control method of the great power bidirectional full-bridge DC-DC converter of base said system, methods described includes following
Step：
Indicate now not allow to start system for low level by the quick I/O that shuts down of hardware circuit initialization after S1, start
System；
S2, single-chip microcomputer read failure instruction state, if now fault-free, single-chip microcomputer is given by timer interruption online
Square wave, CPLD judge single-chip microcomputer whether normal work by the online square wave of circulatory monitoring, while single-chip microcomputer reads control station
Control model is indicated, and indicates that the control model that CPLD is required is voltage mode control or current control by control mode switch
Pattern；
S3, CPLD confirm single-chip microcomputer online in the case of read control model indicate, and monitoring signals conditioning with cross limit
The state of monitoring modular, if signal condition with cross limit monitoring modular data indicate system without exception, enable PWM produce with
Drive module, and power direction instruction is given, indicate that the power direction that single-chip microcomputer now works is boosting direction or blood pressure lowering side
To；If starting fault-free, system carries out homeostatic control and realizes systemic-function；
If S4 start-up courses break down, the communication of system will be blocked, and system then enters protected mode, modification event
Barrier indicates that I/O is high level, indicates that system failure, single-chip microcomputer send the instruction that system enters guard mode to control station；
If S5 systems enter guard mode, CPLD maintains indicating fault, the intervalometer of single-chip microcomputer to carry out fault time
Judge, if within 1min, the system failure indicates not cut away, then single-chip microcomputer sends the instruction for turning off system to control station, control
Automatically modification quickly shuts down I/O for low level to platform, and disability pattern starts, and wait control station is instructed next time；If within 1min, being
System failure vanishes, then enter failure vanishes and confirm program, carry out 30s judgements by intervalometer, if this period does not enter back into being
System malfunction, then reenter step S2；
If S6 system control positions indicate to shut down, single-chip microcomputer provides quick shutdown instruction, and CPLD indicates that system is entered and shuts down
Pattern, control PWM are produced and are supplied and discharge magneticss energy with drive module and protection module cut-out energy source, when signal is adjusted
Reason and all pwm signals to enter idle pulley etc. to be controlled of when crossing limit monitoring modular and indicating that magneticss noenergy is stored, disabling
Platform instruction processed.
Used as a kind of preferred version, the signal condition is accurate used in same voltage channel with limit monitoring modular excessively
Voltage source carries out voltage order one division, is divided into two grades of high voltage and low-voltage；Secondary voltage is carried out again with precision resistance
Divide, high voltage is divided into：Urgent resistance consumption threshold value, overvoltage threshold and the stagnant ring value of high pressure；Low-voltage is divided into：Nominal reference,
The stagnant ring value of low pressure and brownout threshold；Wherein, threshold value class voltage is realized by single limit comparator, touches threshold value in monitoring voltage
Moment, hardware protection is realized by hardware at once；Stagnant ring value class voltage is realized by hysteresis comparator, is met in start and stop
Voltage jump is caused to finally result in the badness of system repeatedly start and stop in journey by load changing；In the same manner, to current signal and
Temperature signal carries out same division.
The present invention has following beneficial effect relative to prior art：
1st, the main topology of circuit of the invention adopts two-way full-bridge DC-DC converter, and using CPLD as digital control part,
Using single-chip microcomputer as simulation control part, by signal condition and the state for crossing limit monitoring modular, protection module and control station
Various information in the shutdown process of comprehensive two-way full-bridge DC-DC converter, and by the continuous inquiry system of communication bus
CPLD and the working condition of single-chip microcomputer, comprehensive all information carry out flow control, realize great power bidirectional full-bridge DC-DC converter
Reliable start and stop.
2nd, signal condition of the invention with cross limit monitoring modular using single limit comparator and hysteresis comparator be prevented from be
System should be the mutation of start and stop voltage x current and cause system repeatedly start, while can guarantee that the very first time in system jam again
Disabled pattern by hardware protection.
3rd, single-chip microcomputer and CPLD of the invention carry out logic level one-way communication using 7 logical I/Os, realize whole system
Information exchange, the function of seven logical I/Os include inductive current state instruction, control mode switch indicate, monolithic acc power
The online square wave of direction modification application, single-chip microcomputer is indicated, quick shutdown is indicated, CPLD power directions are indicated, indicating fault, due to
The equal one-way only operation of all of logical I/O, it is ensured that reliability.
4th, the present invention is communicated using unidirectional I/O level, and the reliability of communication is very high, simultaneously as there is seven communications total
Line, communication information are full, can guarantee that whether system moment in start-up course rapidly and accurately holds the modules of system
Normal work simultaneously indicates other systems to certain mode activated, it is ensured that system ensure that the reliable fortune of system in shutdown process
OK.
Description of the drawings
Fig. 1 is the start-stop control system structured flowchart of the great power bidirectional full-bridge DC-DC converter of the present invention.
Fig. 2 is the control sketch of the two-way full-bridge DC-DC converter of the present invention.
Fig. 3 is the structural representation of the half-bridge module SKM50GB12T4 of the present invention.
Fig. 4 is the circuit theory diagrams of the blood pressure lowering IGBT modules of the present invention.
Fig. 5 is the circuit theory diagrams of the boosting IGBT modules of the present invention.
Fig. 6 is the driver circuit schematic diagram of the blood pressure lowering IGBT modules of the present invention and boosting IGBT modules.
Fig. 7 is the buck PWM controller schematic diagram of the present invention.
Fig. 8 is the boosting PWM controller schematic diagram of the present invention
Fig. 9 is the schematic diagram of overvoltage crowbar in protection module of the invention.
Figure 10 is the schematic diagram of start and stop protection circuit in protection module of the invention.
Figure 11 is that the signal condition of the present invention limits schematic diagram of the monitoring modular to voltage division with crossing.
Figure 12 is that the signal condition of the present invention crosses the schematic diagram for limiting observation circuit with crossing in limit monitoring modular.
Figure 13 is the signal condition and the schematic diagram for crossing inductive current modulate circuit in limit monitoring modular of the present invention.
Figure 14 is the communication bus schematic diagram between the single-chip microcomputer and CPLD of the present invention.
Figure 15 is the on off control method flow diagram of the great power bidirectional full-bridge DC-DC converter of the present invention.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment 1：
As shown in figure 1, the start-stop control system of the great power bidirectional full-bridge DC-DC converter of the present embodiment include two-way complete
(Pulse Width ModulatI/On, pulse width are adjusted with limit monitoring modular, PWM is crossed for bridge DC-DC converter, signal condition
System) produce and drive module, protection module, CPLD (Complex Programmable Logic Device, complex programmable
Logical device), single-chip microcomputer and control station；The signal condition and the input and two-way full-bridge DC-DC of crossing limit monitoring modular
Changer is connected, to monitor voltage, electric current and the temperature signal of two-way full-bridge DC-DC converter, outfan respectively with CPLD and
Single-chip microcomputer is connected；The outfan of the CPLD is produced with PWM respectively and is connected with the input of drive module and protection module；Described
PWM is produced and is connected with two-way full-bridge DC-DC converter with the outfan of drive module and protection module, driving power circuit realiration
Power conversion；It is connected by communication bus between the single-chip microcomputer and CPLD, single-chip microcomputer is also by SPI communication bus and control station
It is connected, interacts with control station.
The control of the two-way full-bridge DC-DC converter is as shown in Fig. 2 the controller shown in figure refers to CPLD, monolithic
Machine, used as digital control part, single-chip microcomputer is used as simulation control part for CPLD.
The two-way full-bridge DC-DC converter includes four IGBT (Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor) module and a transformator, four IGBT modules adopt half-bridge module
The structure of SKM50GB12T4, each half-bridge module SKM50GB12T4 is as shown in figure 3, two of which IGBT module and transformator
High-pressure side connects, and used as blood pressure lowering IGBT modules, its connection figure is as shown in figure 4, the low pressure of two other IGBT module and transformator
End connection, used as boosting IGBT modules, its connection figure is as shown in Figure 5；The driving electricity of blood pressure lowering IGBT modules and boosting IGBT modules
Road is as shown in Figure 6.The input signal of PWM is input to resistance R4 for PWMin and is followed by optocoupler TLP152, optocoupler TLP152 output levels
Low and high level VO between VDD+15_D2 to VEE-15_D2, is driven resistance selection by D1 and D2 afterwards so that drive
Signal is realized changing down pass soon, protects the driving stage of IGBT pipes without damage；Two-way pipe D7 is driven in order to avoid drive signal exceedes
Ceiling voltage 20V needed for dynamic level；Electric capacity C9, C11, C14 and C15 and stabilivolt D5 and D10 achieve the power supply decoupling of optocoupler
And voltage stabilizing.
The PWM is produced includes buck PWM controller and boosting PWM controller, the blood pressure lowering PWM controls with drive module
UC3825 chip of the device using T1 companies, as shown in fig. 7, BuckCurrentSet is input to the NI feet of buck controller UC3825
Afterwards, by internal oscillator and the trailing edge of comparator modification output PWM, so as to change the dutycycle of output PWM, reach
The effect of PWM duty cycle control.Wherein Ramp_Buck is compensation input pin, and 2 tunnels of PWM waveform point of output, are BUCK_AC
And BUCK_BD；UC3875 chip of the boosting PWM controller using T1 companies, as shown in figure 8, in the same manner, UC3875 is according to defeated
Enter signal BoostCurrentSet and slope compensation signal Ramp_Boost is compared in chip internal and agitator and comparator
The relative phase of modification output PWM, exports different pwm signal BOOST_A to the BOOST_D of four tunnel phase places, reaches PWM duty cycle
The effect of control.
The protection module includes multiple overvoltage crowbars and multiple start and stop protection circuits, and the overvoltage crowbar is such as
Shown in Fig. 9, including single limit comparator (adopting LM319) and first resistor R117, the input termination of single limit comparator LM319
Super-capacitor voltage, outfan are connected with first resistor R117.When super voltage SuperCapVolt exceedes setting voltage
During SuperCapVolt_Set, the OC doors output of the U11A of single limit comparator LM319 is pulled upward to by first resistor R117
VDDA3.3 high level, otherwise output low level.
The start and stop protection circuit as shown in Figure 10, including hysteresis comparator (adopting TL074B), second resistance R120, the
Three resistance R126, the 4th resistance R134, the 5th resistance R113 and diode, the input of the hysteresis comparator TL074B pass through
Second resistance R120 connects super-capacitor voltage, and outfan is connected with the 4th resistance R134 by 3rd resistor R126, two pole
The positive pole of pipe is connected with the outfan of hysteresis comparator TL074B, and negative pole is by the 5th resistance R113 and hysteresis comparator TL074B
Input connection.When super voltage SuperCapVolt exceedes setting voltage SuperCapVolt_Set, hysteresis comparator
The U9A output high level of TL074B, is close to VCC12, is about with the output of the 4th resistance R134 partial pressures by 3rd resistor R126
The SuperCapVolt_StageH signals of 3.3V.Conversely, output low level.
As shown in figure 11, for load changing when suppression electromagnetic interference and start and stop, the signal condition is monitored with limit is crossed
Module precision voltage source used in same voltage channel carries out voltage order one division, is divided into high voltage and low-voltage two
Grade；Secondary voltage division is carried out again with precision resistance, high voltage is divided into：Urgent resistance consumption threshold value, overvoltage threshold and high pressure are stagnant
Ring value；Low-voltage is divided into：The stagnant ring value of nominal reference, low pressure and brownout threshold；Wherein, threshold value class voltage (urgent resistance consumption threshold
Value, overvoltage threshold, nominal reference, brownout threshold) realized by single limit comparator, in the wink that monitoring voltage touches threshold value
Between, hardware protection is realized by hardware at once；Stagnant ring value class voltage (the stagnant ring value of high pressure, the stagnant ring value of low pressure) by stagnant chain rate compared with
Device realizes that satisfaction is caused voltage jump to finally result in the severe shape of system repeatedly start and stop in shutdown process by load changing
State；In the same manner, same division is carried out to current signal and temperature signal；The object of these signal pins pair includes：Primary voltage with
Totally 10 measurements of four temperature surveys on electric current, secondary voltage and electric current, transformer current and inductive current and fin
Parameter；Wherein, signal condition crosses the principle for limiting observation circuit as shown in figure 12 with crossing to limit in monitoring modular, when the electricity of super capacitor
When pressure exceedes urgent resistance consumption threshold value, single limit comparator output high level enables resistance power consumption resistance and carries out energy release；Work as super capacitor
Voltage when exceeding overvoltage threshold, single limit comparator is protected to CPLD conveying overvoltage promptings；When super capacitor in high pressure and
By hysteresis comparator to the stagnant ring signal of CPLD conveying high-pressures or the stagnant ring signal of low pressure between the stagnant ring value of low pressure；When super electricity
When holding voltage less than brownout threshold, single limit comparator is protected to CPLD conveying low pressure promptings；If whole process system is just
Often, then carry out voltage by nominal reference to give, for the input of control system.
As shown in fig. 13 that signal condition with cross limit monitoring modular in inductive current modulate circuit, electricity of the circuit to inductance
Stream is fed separately to two kinds of different rectification circuits after carrying out rectification, when charging to super capacitor, inductive current is negative, now leads to
Cross two operational amplifiers of U14D and U14A to nurse one's health inductive current, after conditioning, inductive current is changed into positive current.Super
When electric capacity outwards discharges, after being nursed one's health by two operational amplifiers of U14C and U14B, input impedance is enhanced, is reduced
Output impedance, it is ensured that the integrity of signal is obtaining accurate conditioned signal.
The CPLD can adopt altera corp's model 5M160ZE64, the single-chip microcomputer adopt TI company types
Number for MSP430F5438 single-chip microcomputer；The single-chip microcomputer and CPLD carry out logic level one-way communication using 7 logical I/Os, real
The information exchange of existing whole system, the function of seven logical I/Os is respectively as shown in figure 14：1) inductive current state instruction；2) control
Pattern switching processed is indicated；3) single-chip microcomputer power direction modification application；4) the online square wave of single-chip microcomputer is indicated；5) quick shutdown refers to
Show；6) CPLD power directions are indicated；7) indicating fault；The equal one-way only operation of all of logical I/O, it is ensured that reliability.
As shown in figure 15, the present embodiment additionally provides a kind of on off control side of great power bidirectional full-bridge DC-DC converter
Method, the method are realized based on said system, are comprised the following steps：
Indicate now not allow to start system for low level by the quick I/O that shuts down of hardware circuit initialization after S1, start
System；
S2, single-chip microcomputer read failure instruction state, if now fault-free, single-chip microcomputer is given by timer interruption online
Square wave, CPLD judge single-chip microcomputer whether normal work by the online square wave of circulatory monitoring, while single-chip microcomputer reads control station
Control model is indicated, and indicates that the control model that CPLD is required is voltage mode control or current control by control mode switch
Pattern；
S3, CPLD confirm single-chip microcomputer online in the case of read control model indicate, and monitoring signals conditioning with cross limit
The state of monitoring modular, if signal condition with cross limit monitoring modular data indicate system without exception, enable PWM produce with
Drive module, and power direction instruction is given, indicate that the power direction that single-chip microcomputer now works is boosting direction or blood pressure lowering side
To now, according to control model and the power direction of control station, system has been able to be operated in the mode of operation of determination and descends；
If starting fault-free, system carries out homeostatic control and realizes systemic-function；
If S4 start-up courses break down, the communication of system will be blocked, and system then enters protected mode, modification event
Barrier indicates that I/O is high level, indicates that system failure, single-chip microcomputer send the instruction that system enters guard mode to control station；
On the one hand the energy supply of energy source is cut off, and anti-locking system continues energy storage and finally damages system；On the other hand protection module is opened,
The energy of magneticss is discharged by resistance, prevents from turning off spike damage system；
If S5 systems enter guard mode, CPLD maintains indicating fault, the intervalometer of single-chip microcomputer to carry out fault time
Judge, if within 1min, the system failure indicates not cut away, then single-chip microcomputer sends the instruction for turning off system to control station, control
Automatically modification quickly shuts down I/O for low level to platform, and disability pattern starts, and wait control station is instructed next time；If within 1min, being
System failure vanishes, then enter failure vanishes and confirm program, carry out 30s judgements by intervalometer, if this period does not enter back into being
System malfunction, then reenter step S2；
If S6 system control positions indicate to shut down, single-chip microcomputer provides quick shutdown instruction, and CPLD indicates that system is entered and shuts down
Pattern, control PWM are produced and are supplied and discharge magneticss energy with drive module and protection module cut-out energy source, when signal is adjusted
When reason is with the instruction magneticss noenergy storage of limit monitoring modular is crossed, all pwm signals are simultaneously for disability (i.e. from enabling to not enabling)
Enter idle pulley and wait console instruction.
In sum, the main topology of circuit of the invention adopts two-way full-bridge DC-DC converter, and using CPLD as numeral control
Part processed, using single-chip microcomputer as simulation control part, by signal condition and crosses limit monitoring modular, protection module and control station
The various information comprehensive in the shutdown process of two-way full-bridge DC-DC converter of state, and constantly inquired by communication bus and be
The working condition of CPLD and single-chip microcomputer in system, comprehensive all information carry out flow control, realize that great power bidirectional full-bridge DC-DC is converted
The reliable start and stop of device.
The above, patent preferred embodiment only of the present invention, but the protection domain of patent of the present invention is not limited to
This, any those familiar with the art in the scope disclosed in patent of the present invention, according to the skill of patent of the present invention
Art scheme and its inventive concept equivalent or change in addition, belong to the protection domain of patent of the present invention.
Claims (10)
1. the start-stop control system of great power bidirectional full-bridge DC-DC converter, it is characterised in that：Become including two-way full-bridge DC-DC
Parallel operation, signal condition are produced and drive module, protection module, CPLD, single-chip microcomputer and control station with limit monitoring modular, PWM is crossed,
The signal condition with cross limit monitoring modular input be connected with two-way full-bridge DC-DC converter, outfan respectively with CPLD
It is connected with single-chip microcomputer；The outfan of the CPLD is produced with PWM respectively and is connected with the input of drive module and protection module；Institute
State PWM and produce and be connected with two-way full-bridge DC-DC converter with the outfan of drive module and protection module；The single-chip microcomputer with
It is connected by communication bus between CPLD, single-chip microcomputer is connected with control station also by SPI communication bus.
2. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 1, it is characterised in that：
The two-way full-bridge DC-DC converter includes four IGBT modules and a transformator, two of which IGBT module and transformator
High-pressure side connection, used as blood pressure lowering IGBT modules, two other IGBT module is connected with the low-pressure end of transformator, used as boosting
IGBT modules.
3. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 2, it is characterised in that：
Four IGBT modules adopt half-bridge module SKM50GB12T4.
4. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 1, it is characterised in that：
The PWM is produced includes buck PWM controller and boosting PWM controller with drive module.
5. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 4, it is characterised in that：
UC3825 chip of the buck PWM controller using T1 companies, UC3875 core of the boosting PWM controller using T1 companies
Piece.
6. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 1, it is characterised in that：
The protection module includes multiple overvoltage crowbars and multiple start and stop protection circuits.
7. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 6, it is characterised in that：
The overvoltage crowbar includes single limit comparator and first resistor, the input termination super capacitor electricity of single limit comparator
Pressure, outfan are connected with first resistor；The start and stop protection circuit include hysteresis comparator, second resistance, 3rd resistor, the 4th
Resistance, the 5th resistance and diode, the input of the hysteresis comparator connect super-capacitor voltage, outfan by second resistance
It is connected with the 4th resistance by 3rd resistor, the positive pole of the diode is connected with the outfan of hysteresis comparator, and negative pole passes through
5th resistance is connected with the input of hysteresis comparator.
8. the start-stop control system of great power bidirectional full-bridge DC-DC converter according to claim 1, it is characterised in that：
Single-chip microcomputer of the single-chip microcomputer using TI companies model MSP430F5438, the CPLD adopt altera corp's model
5M160ZE64；The single-chip microcomputer and CPLD carry out logic level one-way communication using 7 logical I/Os, realize the letter of whole system
Breath interaction.
9. the on off control method based on the great power bidirectional full-bridge DC-DC converter of system described in claim 1-8, its feature
It is：The method comprising the steps of：
Indicate now not allowing activation system for low level by the quick I/O that shuts down of hardware circuit initialization after S1, start；
S2, single-chip microcomputer read failure instruction state, if now fault-free, single-chip microcomputer provides online side by timer interruption
Ripple, CPLD judge single-chip microcomputer whether normal work by the online square wave of circulatory monitoring, while single-chip microcomputer reads the control of control station
Molding formula is indicated, and indicates that the control model that CPLD is required is voltage mode control or current control mould by control mode switch
Formula；
S3, CPLD confirm single-chip microcomputer online in the case of read control model indicate, and monitoring signals conditioning with cross limit monitoring
The state of module, if with the data for crossing limit monitoring modular, signal condition indicates that system is without exception, enables PWM and produces and drive
Module, and power direction instruction is given, indicate that the power direction that single-chip microcomputer now works is boosting direction or blood pressure lowering direction；If
Start fault-free, then system carries out homeostatic control and realizes systemic-function；
If S4 start-up courses break down, the communication of system will be blocked, and system then enters protected mode, and modification failure refers to
Show I/O for high level, indicate that system failure, single-chip microcomputer send the instruction that system enters guard mode to control station；
If S5 systems enter guard mode, CPLD maintains indicating fault, the intervalometer of single-chip microcomputer to sentence fault time
Disconnected, if within 1min, the system failure indicates not cut away, then single-chip microcomputer sends the instruction for turning off system, control station to control station
Automatically for low level, disability pattern starts the quick I/O that shuts down of modification, waits control station to instruct next time；If within 1min, system
Failure vanishes, then enter failure vanishes and confirm program, carry out 30s judgements by intervalometer, if this period does not enter back into system
Malfunction, then reenter step S2；
If S6 system control positions indicate to shut down, single-chip microcomputer provides quick shutdown instruction, and CPLD indicates that system is entered and shuts down mould
Formula, control PWM are produced and are supplied and discharge magneticss energy with drive module and protection module cut-out energy source, work as signal condition
With all pwm signals to enter idle pulley etc. to be controlled of when crossing limit monitoring modular and indicating that magneticss noenergy is stored, disabling
Platform is instructed.
10. the on off control method of great power bidirectional full-bridge DC-DC converter according to claim 9, it is characterised in that：
The signal condition carries out voltage order one division with limit monitoring modular precision voltage source used in same voltage channel is crossed, and draws
It is divided into two grades of high voltage and low-voltage；Secondary voltage division is carried out again with precision resistance, high voltage is divided into：Urgent resistance consumption
The stagnant ring value of threshold value, overvoltage threshold and high pressure；Low-voltage is divided into：The stagnant ring value of nominal reference, low pressure and brownout threshold；Wherein,
Threshold value class voltage is realized by single limit comparator, in the moment that monitoring voltage touches threshold value, is realized by hardware at once hard
Part is protected；Stagnant ring value class voltage is realized by hysteresis comparator, meets and caused voltage in shutdown process by load changing
Mutation finally results in the badness of system repeatedly start and stop；In the same manner, same division is carried out to current signal and temperature signal.
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