CN101478240A - Digital DC-DC voltage boosting converter - Google Patents
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Abstract
本发明公开一种数字直流－直流升压变换器，包括有：控制模块，所述的控制模块连接并控制升压转换电路，所述的控制模块还连接比较电路并通过接收比较电路的信号去控制升压转换电路，所述的升压转换电路还与比较电路相连接，实现对升压电压的闭环控制。所述的控制模块采用复杂可编程逻辑器件或简单可编程逻辑器件或现场可编程门列阵。本发明设计简洁，易于实现，重构的特性使其适应性强，便于参数匹配；全数字化设计，控制精确；具有很高的性价比；能量转换效率高，热负荷小，不使用散热器就可以工作；体积小，适合封装在高压共轨ECU中；抗干扰能力强，适合工作环境恶劣的场所(高温、强振动)。
The invention discloses a digital DC-DC boost converter, which includes: a control module, the control module is connected to and controls a boost conversion circuit, and the control module is also connected to a comparison circuit and receives a signal from the comparison circuit to Controlling the boost conversion circuit, the boost conversion circuit is also connected with the comparison circuit to realize closed-loop control of the boost voltage. The control module adopts complex programmable logic device or simple programmable logic device or field programmable gate array. The present invention is simple in design, easy to realize, and the characteristics of reconfiguration make it highly adaptable and convenient for parameter matching; full digital design, precise control; high cost performance; high energy conversion efficiency, small heat load, and can be done without using a radiator Work; small size, suitable for packaging in high-voltage common rail ECU; strong anti-interference ability, suitable for places with harsh working environments (high temperature, strong vibration).
Description
Technical field
The present invention relates to a kind of digital booster converter.Particularly relate to a kind of digital DC-DC voltage boosting converter that is used for diesel engine high-pressure co-rail ECU unit booster converter.
Background technology
High pressure common rail fuel injection system has very high expulsion pressure, and the independent flexible and controllable of nozzle parameter such as injection pressure, the oil spout moment and distributive value.But,, require common-rail injector to have opening and closing response speed faster to the demands for higher performance of common-rail injector in order to realize the flexible control technology of high pressure co-rail system multiple-pulse fuel injection mode.This at first requires the executive component-electromagnetically operated valve of common-rail injector to have the feature of high-speed response, and the energy input form that drives electromagnetically operated valve has critical effect.The optimum energy input scheme is when armature motion just begins, just can obtain maximum force, armature is all with peak acceleration work in whole motion process almost, and armature pickup time will be the shortest, uses high drive when the common-rail injector electromagnetically operated valve begins work for this reason.Also show the rising along with driving voltage in the practical application, the unlatching speed of common-rail injector will obtain raising to a certain degree, and this provides modulator approach more flexibly for the multiple-pulse fuel oil sprays.
At present, the commercial boost converter of using mostly is to adopt isolating transformer type DC-DC module, and with under the constant power, volume is big, efficient is relatively low, and costs an arm and a leg, and is not suitable for the Boost Converter Design of high-pressure common rail ECU.But not the isolation boosting converter mostly is a monolithic integrated current type PWM booster converter, it integrates power switch pipe and control circuit, and integrated power switch pipe only bears lower booster voltage (being difficult to reach the high pressure of 110V), and the PWM booster converter of employing power switch pipe separate type exists some unavoidable difficult design in the current existing booster circuit.At first, be faced with the Mixed Design of analog circuit and digital circuit in the circuit design, the HF switch noise that has digital circuit to produce disturbs responsive analog circuit easily, as circuit such as band-gap reference, pulse-width modulations; Next is the subharmonic oscillation problem, for PWM current-mode control converter, when duty ratio surpasses 50%, no matter the state of Voltage Feedback outer shroud how, current inner loop all is unsettled, be easy to generate the subharmonic oscillation problem, must solve this problem by adding slope compensation circuit during design, this will cause the complexity of circuit design; The PWM operating frequency depends on oscillating circuit capacitor C T and resistance R T value in the PWM current-mode control converter, though use general electric capacity, resistance to reduce cost, is difficult to guarantee the precision of PWM operating frequency.
Today, the essence variation has all taken place in the method for designing of digital electronic system and design means, just by the discrete digital circuit to programmable logic device (PLD, Programmable Logic Device) and programmable asic (ASIC, Application Specific Integrated Circuit) change.CPLD (CPLD) is one of programmable asic that is most widely used at present, be based on the chip of electric design automation (EDA) technology, but it has static state overprogram and dynamic characteristic at system reconfiguration, make the function of hardware to revise by programming, improved electronic system design flexibility and versatility greatly as software design.And, not only can realize the total digitalization design of boosting unit based on the digital DC-DC booster converter of CPLD, improve anti-interference, reliability, and improved the flexibility of design and the adaptability of boosting unit.
Summary of the invention
Technical problem to be solved by this invention is, a kind of PWM (pulse width modulated wave) energizing switch power tube that utilizes certain frequency is provided, make energy storage inductor constantly charging and discharge, and making the voltage pump liter after the energy storage inductor energy storage discharge, the high-tension electricity potential energy after voltage pump rises is stored at the digital DC-DC voltage boosting converter that is used for diesel engine high-pressure co-rail ECU unit booster converter in the electric capacity by rectifier diode.
The technical solution adopted in the present invention is: a kind of digital DC-DC voltage boosting converter, include: control module, described control module connects and the control voltage up converting circuit, described control module also connects comparison circuit and removes to control voltage up converting circuit by the signal that receives comparison circuit, described voltage up converting circuit also is connected with comparison circuit, realizes the closed-loop control to booster voltage.
Described control module adopts CPLD or simple programmable logical device or Field Programmable Gate Array.
Described voltage up converting circuit includes power tube chip for driving U12, among the described chip for driving U12: 1 pin connects the 12V power supply; 2,5,6,7,8,9,10,11 and 15 pin connect the 12V power supply by capacitor C 105, go back earth terminal VSS; The output pin PWM1 of 3 pin link control modules; 4 pin are by capacitor C 106 earth terminal VSS; 16 pin connect the 12V power supply by diode D44, also by capacitor C 109 earth terminal VSS; The source electrode of 13 pin and power tube Q2 is together by resistance R 118 earth terminal VSS; 14 pin connect the grid of power tube Q2 by resistance R 116, and the grid of power tube Q2 is also by diode D45 earth terminal VSS; The drain electrode of power tube Q2 connects power port BAT_POWER by inductance L 4, also connects 110V power supply and capacitor C 104 respectively by rectifier diode D42, the other end earth terminal VSS of capacitor C 104, and the two ends of described capacitor C 104 also connect comparison circuit.
Described comparison circuit includes comparator U11B, among the described comparator U11B: 6 pin are by the series connection 110V power supply and the voltage up converting circuit of resistance R 114 and resistance R 113, also connect voltage up converting circuit by resistance R 117,6 pin also pass through the parallel connection of capacitor C 107 and C108 with pin 4 earth terminal VSS; Pin 5 and pin 8 connect the 3.3V power supply; Pin 7 connects the 3.3V power supply by resistance R 115, also the input pin FEEDBACK1 of link control module.
Digital DC-DC voltage boosting converter of the present invention has following characteristics:
1, design is succinct, is easy to realize that the characteristic of reconstruct makes its adaptability strong, is convenient to parameter matching;
2, total digitalization design, control are accurately; Has very high cost performance;
3, energy conversion efficiency height, heat load is little, does not use radiator just can work;
4, volume is little, is fit to be encapsulated among the high-pressure common rail ECU; Antijamming capability is strong, is fit to the place (high temperature, strong vibration) of work under bad environment.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is control module circuit theory diagrams of the present invention;
Fig. 3 is the circuit theory diagrams of voltage up converting circuit of the present invention and comparison circuit.
Embodiment
Below in conjunction with embodiment and accompanying drawing digital DC-DC voltage boosting converter of the present invention is made a detailed description.
The present invention is in the series loop of power supply, switching power tube and energy storage inductor, utilize PWM (pulse width modulated wave) the energizing switch power tube of certain frequency, make energy storage inductor constantly charging and discharge, and the energy storage inductor energy storage has the effect that voltage pump is risen after discharging, high-tension electricity potential energy after voltage pump rises is stored in the electric capacity by rectifier diode, i.e. the chopped mode principle of boosting.Wherein adopt VHDL (Very High Speed Integrated Circuit (VHSIC) hardware description language) software programming to go up to produce and decide the PWM field wave of frequency at CPLD (CPLD), can accurately realize accounting for arbitrarily wide field wave, utilize the closed-loop control that comparison circuit just can real booster voltage simultaneously than (0-100%) and certain frequency (1-5MHZ).
As shown in Figure 1, digital DC-DC voltage boosting converter of the present invention, include: control module C1, described control module C1 connects and control voltage up converting circuit C2, described control module C1 also connects comparison circuit C3 and removes to control voltage up converting circuit C2 by the signal that receives comparison circuit C3, described voltage up converting circuit C2 also is connected with comparison circuit C3, realizes the closed-loop control to booster voltage.
Described control module C1 adopts CPLD (CPLD) or simple programmable logical device (PLD) or Field Programmable Gate Array (FPGA).
As shown in Figure 2, embodiments of the invention are that the employing model is the CPLD (CPLD) of CPLD-MAX3064A.
Control module C1 has mainly realized the function of three parts, comprising clock division function, control switch function and PWM (pulse-width modulation) signal generation function, these functions are based on CPLD-MAX3064A and utilize VHDL (Very High Speed Integrated Circuit (VHSIC) hardware description language) software programming to realize.
The clock frequency that control module C1 disposed is 25MHZ, imports it from high-pressure common rail ECU (ECU (Electrical Control Unit)) from the CLOCK port of control module C1, and ECU uses the little processing of MCF5235 of FREESCALE company, and the clock circuit of MCF5235 is exported this clock signal.In the software design of control module C1, program has realized two concurrent processes, one is the clock division process, the main clock division function that realizes uses 8 binary counters to realize here, and the corresponding frequency in n (0-7) position of corresponding counter is 25/ (2^n) MHZ, when n=2, clock frequency by the 2nd generation of counter is 6.25MHZ, and the clock distribution behind the frequency division to pwm signal generation functional module, is used for setting the operating frequency of PWM field wave; Another is a pwm signal generation process, mainly realizes the generation function of pwm signal.Here use 100 binary shift registers to realize, clock signal is from the clock division process, store in the shift register n continuous ' 1 ', other logical bit are ' 0 ', when n=75, it is 75% PWM field wave that this process can produce the wide ratio of accounting for of one-period property, when the clock frequency is 6.25MHZ, then Shu Chu PWM field wave operating frequency is 62.5KHZ, its PWM field wave directly outputs in the control switch functional module, the modulation that these two processes have well solved PWM field wave operating frequency and accounted for wide ratio.Simultaneously, utilize logic and operation to realize the control switch function, here the feedback signal of FEEDBACK1 port and the PWM field wave of pwm signal generation process generation are carried out logic and operation, signal after logic is synthetic is by the output of the PWM1 port among the control module C1, thereby realization is by the purpose of feedback signal State Control PWM field wave output.
As shown in Figure 3, described voltage up converting circuit C2 includes power tube chip for driving U12, among the described chip for driving U12: 1 pin connects the 12V power supply; 2,5,6,7,8,9,10,11 and 15 pin connect the 12V power supply by capacitor C 105, go back earth terminal VSS; The output pin PWM1 of 3 pin link control modules (C1); 4 pin are by capacitor C 106 earth terminal VSS; 16 pin connect the 12V power supply by diode D44, also by capacitor C 109 earth terminal VSS; The source electrode of 13 pin and power tube Q2 is together by resistance R 118 earth terminal VSS; 14 pin connect the grid of power tube Q2 by resistance R 116, and the grid of power tube Q2 is also by diode D45 earth terminal VSS; The drain electrode of power tube Q2 connects power port BAT_POWER by inductance L 4, also connects 110V power supply and capacitor C 104 respectively by rectifier diode D42, the other end earth terminal VSS of capacitor C 104, and the two ends of described capacitor C 104 also connect comparison circuit (C3).
Described comparison circuit C3 includes comparator U11B, described comparator U11B:6 pin also connects voltage up converting circuit C26 pin by resistance R 117 and also passes through the parallel connection of capacitor C 107 and C108 with pin 4 earth terminal VSS by the series connection 110V power supply and the voltage up converting circuit C2 of resistance R 114 and resistance R 113; Pin 5 and pin 8 connect the 3.3V power supply; Pin 7 connects the 3.3V power supply by resistance R 115, also the input pin FEEDBACK1 of link control module C1.
The operation principle of described voltage up converting circuit C2 and comparison circuit C3 is:
The PWM field wave of control module C1 inserts PWM1 port among the voltage up converting circuit C2; after the amplification of power tube chip for driving U12 (model is IR2125) signal; directly output to the grid of power tube Q2 (model is IXFH58N20E) by resistance R 116; the grid of power tube Q2 is also connecting Transient Suppression Diode D45 (model is 1PMT12AT1) simultaneously, is used for protecting power tube chip for driving U12 to prevent to destroy from the high pressure of forceful electric power.The PWM field wave of power tube Q2 grid is being controlled the conducting in power supply, inductance coil L4, power tube Q2 and loop, resistance R 118 place (loop of boosting) and is being closed, make inductance coil L4 high speed charging and discharging, realize that voltage pump rises output, the electric energy that last pump rises is stored in the capacitor C 104 by rectifier diode D42 (model is MURB1620CT), thereby has realized the conversion of low-voltage direct to high voltage direct current.Here in order to improve the speed of response that engine fuel injector is opened, need with low pressure 24V conversion high pressure 110V for the voltage control after will changing in certain limit, here adopt the resistance ratio circuit to come the value of setting voltage, the resistance ratio circuit is by resistance R 113, R114 and R117 form, the resistance ratio circuit with 110V in proportion scaling to 3.3V, voltage signal behind the scaling is after capacitor C 107 and C108 filtering, be connected to inverting input 6 pin of comparator U11B (model is LM2903) and 3.3V level ratio, comparative result directly outputs to the FEEDBACK1 port to control module C1, when the magnitude of voltage of capacitor C 104 positive poles does not reach the 110V of setting, the FEEDBACK1 port is the high level of 3.3V, otherwise export the low level of 0V, thereby reach purpose the booster voltage closed-loop control.Also designed the overcurrent protection measure in the circuit simultaneously, in the loop of boosting, add sampling resistor R118 on the one hand, detect the maximum current in the loop, feedback signal is passed to power tube chip for driving U12, compare with its internal reference reference voltage (0.23V), thus the output of the PWM field wave of control after power tube chip for driving U12 amplifies, when the electric current in the loop of boosting surpasses set point, turn-off the output of this PWM field wave, thereby reach the function of overcurrent protection; On the other hand at the power port place; resettable fuse F1 (PPTC) JK30 has contacted; the loop is short-circuited or when transshipping in case boost; the big electric current of fuse F1 of flowing through makes its collection temperature rise; when reaching Curie temperature; its density of states reduces rapidly; phase transformation increases; inner electrically conductive links is change of snowslide attitude or fracture, and fuse is phase step type and adjourns high-impedance state, and electric current is by rapid pinch off; thereby circuit is carried out fast; limit accurately and protect, its small electric current makes fuse F1 be in guard mode always, after outage and fault eliminating; its collection temperature drop is low; the density of states increases, and phase transformation is restored, and nanocrystal is reduced into the chain conductive path; resettable fuse reverts to normal condition; need not artificial replacing, thereby avoided fortuitous event that the circuit elements device is caused damage, thereby improve the functional reliability of digital DC-DC voltage boosting converter greatly.
Claims (4)
1. digital DC-DC voltage boosting converter, include: control module (C1), it is characterized in that, described control module (C1) connects and control voltage up converting circuit (C2), described control module (C1) also connects comparison circuit (C3) and removes to control voltage up converting circuit (C2) by the signal that receives comparison circuit (C3), described voltage up converting circuit (C2) also is connected with comparison circuit (C3), realizes the closed-loop control to booster voltage.
2. digital DC-DC voltage boosting converter according to claim 1 is characterized in that, described control module (C1) adopts CPLD or simple programmable logical device or Field Programmable Gate Array.
3. digital DC-DC voltage boosting converter according to claim 1 is characterized in that, described voltage up converting circuit (C2) includes power tube chip for driving U12, among the described chip for driving U12: 1 pin connects the 12V power supply; 2,5,6,7,8,9,10,11 and 15 pin connect the 12V power supply by capacitor C 105, go back earth terminal VSS; The output pin PWM1 of 3 pin link control modules (C1); 4 pin are by capacitor C 106 earth terminal VSS; 16 pin connect the 12V power supply by diode D44, also by capacitor C 109 earth terminal VSS; The source electrode of 13 pin and power tube Q2 is together by resistance R 118 earth terminal VSS; 14 pin connect the grid of power tube Q2 by resistance R 116, and the grid of power tube Q2 is also by diode D45 earth terminal VSS; The drain electrode of power tube Q2 connects power port BAT_P0WER by inductance L 4, also connects 110V power supply and capacitor C 104 respectively by rectifier diode D42, the other end earth terminal VSS of capacitor C 104, and the two ends of described capacitor C 104 also connect comparison circuit (C3).
4. digital DC-DC voltage boosting converter according to claim 1, it is characterized in that, described comparison circuit (C3) includes comparator U11B, among the described comparator U11B: 6 pin are by the series connection 110V power supply and the voltage up converting circuit (C2) of resistance R 114 and resistance R 113, also connect voltage up converting circuit (C2) by resistance R 117,6 pin also pass through the parallel connection of capacitor C 107 and C108 with pin 4 earth terminal VSS; Pin 5 and pin 8 connect the 3.3V power supply; Pin 7 connects the 3.3V power supply by resistance R 115, also the input pin FEEDBACK1 of link control module (C1).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103683244A (en) * | 2013-12-03 | 2014-03-26 | 天津航空机电有限公司 | Power loop driving circuit and current-limiting method of solid-state power controller |
| CN105422963A (en) * | 2015-12-18 | 2016-03-23 | 无锡隆盛科技股份有限公司 | Solenoid valve control circuit of electronic unit pump of engine |
| CN105810163A (en) * | 2016-05-04 | 2016-07-27 | 深圳市华星光电技术有限公司 | Boost direct current-direct current converter |
| CN110018370A (en) * | 2019-03-20 | 2019-07-16 | 成都飞机工业（集团）有限责任公司 | A kind of program-controlled oil mass oil temperature simulator |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN117478134A (en) * | 2023-12-25 | 2024-01-30 | 深圳大学 | Variable delay clock circuit and single-bit ADC chip, electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1295014C (en) * | 1986-08-01 | 1992-01-28 | Christopher Paul Henze | Digitally controlled a.c. to d.c. power conditioner that draws sinusoidal input current |
| JP4916711B2 (en) * | 2005-12-09 | 2012-04-18 | ローム株式会社 | DC / DC converter control circuit, control method, and light emitting device and electronic apparatus using the same |
| WO2007138513A1 (en) * | 2006-05-30 | 2007-12-06 | Nxp B.V. | Digitally controlled dc-dc converter |
| CN201285521Y (en) * | 2008-10-09 | 2009-08-05 | 天津大学 | Digital boost converter based on complicated programmable logic device |
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2008
- 2008-10-09 CN CN 200810152270 patent/CN101478240B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103683244A (en) * | 2013-12-03 | 2014-03-26 | 天津航空机电有限公司 | Power loop driving circuit and current-limiting method of solid-state power controller |
| CN105422963A (en) * | 2015-12-18 | 2016-03-23 | 无锡隆盛科技股份有限公司 | Solenoid valve control circuit of electronic unit pump of engine |
| CN105422963B (en) * | 2015-12-18 | 2018-05-04 | 无锡隆盛科技股份有限公司 | Engine electric-controlled single pump electromagnetic valve control circuit |
| CN105810163A (en) * | 2016-05-04 | 2016-07-27 | 深圳市华星光电技术有限公司 | Boost direct current-direct current converter |
| CN105810163B (en) * | 2016-05-04 | 2018-08-14 | 深圳市华星光电技术有限公司 | Boost DC-direct current transducer |
| US10298008B2 (en) | 2016-05-04 | 2019-05-21 | Shenzhen China Star Optoelectronics Technology Co., Ltd | DC to DC boost converter |
| CN110018370A (en) * | 2019-03-20 | 2019-07-16 | 成都飞机工业（集团）有限责任公司 | A kind of program-controlled oil mass oil temperature simulator |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN111579631B (en) * | 2020-06-11 | 2021-04-27 | 中国地质大学（武汉） | A laser ablation system drives plasma mass spectrometer interface conversion circuit |
| CN117478134A (en) * | 2023-12-25 | 2024-01-30 | 深圳大学 | Variable delay clock circuit and single-bit ADC chip, electronic equipment |
| CN117478134B (en) * | 2023-12-25 | 2024-05-31 | 深圳大学 | Variable delay clock circuit, single-bit ADC chip, and electronic equipment |
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