CN108631593B - BUCK-BOOST digital power supply based on bidirectional synchronous rectification - Google Patents
BUCK-BOOST digital power supply based on bidirectional synchronous rectification Download PDFInfo
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- CN108631593B CN108631593B CN201810768513.5A CN201810768513A CN108631593B CN 108631593 B CN108631593 B CN 108631593B CN 201810768513 A CN201810768513 A CN 201810768513A CN 108631593 B CN108631593 B CN 108631593B
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- circuit
- boost
- buck
- power supply
- mos tube
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 36
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 25
- 230000003750 conditioning effect Effects 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/096—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the power supply of the control circuit being connected in parallel to the main switching element
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a bidirectional synchronous rectification BUCK-BOOST-based digital power supply, which comprises a BUCK-BOOST main circuit, an MOS tube, an auxiliary power supply, a driving circuit, a signal conditioning circuit, an ADC module and a main control circuit, wherein the main control circuit is used for controlling, the driving circuit drives the MOS tube, the signal conditioning circuit and the ADC module are used for collecting signals of input voltage, output voltage and output current, and the collected signals are subjected to operation control and constant voltage and constant current output. The synchronous rectifying BUCK-BOOST circuit topology formed by cascading the synchronous BUCK circuit and the synchronous BOOST circuit utilizes the MOS tube to replace a rectifying diode in the circuit, the efficiency of a power supply can be remarkably improved due to the fact that the voltage drop on the MOS tube is relatively low when the MOS tube is turned on, and the STM32F334 high-performance 32-bit ARM Cortex-M4 MCU is adopted to construct a digital power supply, output voltage is tracked in real time, and the stable error of the system is reduced.
Description
Technical Field
The invention belongs to the field of power supplies, and particularly relates to a bidirectional synchronous rectification BUCK-BOOST based digital power supply.
Background
With the increasing reduction of non-renewable resources, the demand of people for novel clean energy sources is increased, the development of industries such as solar power generation, wind power generation and micro-grid industry is promoted, energy storage and release and bidirectional flow of energy are needed in products in the industries, for example, the electricity generated by solar energy and wind power can be connected to a grid after boosting and inversion are needed, a system is needed for charging and discharging a battery or a super capacitor to have boosting and voltage reducing functions at the same time, various energy bidirectional flow function rectifying drive circuit topologies are realized, a bidirectional DC-DC converter can generally obtain a novel topology by replacing a rectifying diode in a classical topology circuit with a MOS (metal oxide semiconductor) tube, for example, a bidirectional Cuk circuit, a Sepic circuit, a Zeta circuit and the like, wherein the bidirectional Cuk circuit needs a plurality of inductors and outputs negative voltage, and the output current is smaller; the Sepic circuit has very complex control loop characteristics and has low efficiency; the Zeta circuit is a double Sepic circuit, and requires a higher input voltage ripple and a large capacitance flying capacitor.
The pure BUCK circuit or BOOST circuit in the current market can only flow in one direction, cannot realize the bidirectional flow of energy, and can only realize the voltage increasing and decreasing function in the same direction.
Accordingly, there is a need for further improvements and developments in the art.
Disclosure of Invention
The invention aims to provide a bidirectional synchronous rectification BUCK-BOOST digital power supply, and aims to solve the problem that a circuit in the current market cannot realize bidirectional flow of energy and can only realize a voltage increasing and decreasing function in the same direction.
The adopted technical scheme is as follows:
a digital power supply based on bidirectional synchronous rectification BUCK-BOOST comprises a BUCK-BOOST main circuit, an MOS tube, an auxiliary power supply, a driving circuit, a signal conditioning circuit, an ADC module and a main control circuit, wherein the main control circuit controls the driving circuit to drive the MOS tube, the signal conditioning circuit and the ADC module collect signals of input voltage, output voltage and output current, the collected signals are subjected to operation control, and constant voltage and constant current are output.
The BUCK-BOOST main circuit is formed by cascading a synchronous BUCK circuit and a synchronous BOOST circuit.
The driving circuit adopts a half-bridge driving chip, a bootstrap diode is integrated inside the chip, and the bootstrap capacitor is externally connected.
The auxiliary power supply takes power from the input end and the output end of the BUCK-BOOST circuit through diode isolation.
The signal conditioning circuit is provided with an operational amplifier TLV237, the signal conditioning circuit comprises an input and output voltage detection circuit and an output current detection circuit, the operational amplifier TLV237 reduces the output voltage by adopting a differential circuit, the ADC module samples to realize the input and output voltage detection, and the operational amplifier TLV237 samples to realize the input and output current detection in a differential mode.
The master control circuit takes STM32F334 as a master control chip, the driving circuit is UCC27211 driving circuit, the HRPWM module of STM32F334 generates PWM, and the UCC27211 driving circuit drives the MOS tube.
The beneficial effects are that: the invention provides a bidirectional synchronous rectification BUCK-BOOST-based digital power supply, which adopts synchronous rectification BUCK-BOOST circuit topology formed by cascading a synchronous BUCK circuit and a synchronous BOOST circuit, utilizes MOS (metal oxide semiconductor) tubes to replace rectifier diodes in the circuit, can remarkably improve the efficiency of the power supply due to relatively low voltage drop on the MOS tubes when the MOS tubes are turned on, and adopts STM32F334 high-performance 32-bit ARM Cortex-M4MCU to construct the digital power supply, so as to track output voltage in real time and reduce the stable error of the system.
Drawings
FIG. 1 is a schematic diagram of a bidirectional synchronous rectification BUCK-BOOST digital power supply based on the present invention;
FIG. 2 is a circuit diagram of a BUCK-BOOST main circuit based on a bidirectional synchronous rectification BUCK-BOOST digital power supply of the present invention;
FIG. 3 is a circuit diagram of a MOS transistor driving circuit based on a bidirectional synchronous rectification BUCK-BOOST digital power supply;
FIG. 4 is a circuit diagram of an auxiliary power supply based on a bi-directional synchronous rectification BUCK-BOOST digital power supply in accordance with the present invention;
FIG. 5 is a circuit diagram of an input/output voltage detection based on a bi-directional synchronous rectified BUCK-BOOST digital power supply of the present invention;
FIG. 6 is a circuit diagram of an output current detection based on a bi-directional synchronous rectified BUCK-BOOST digital power supply in accordance with the present invention;
FIG. 7 is a circuit diagram of a reference voltage based on a bi-directional synchronous rectified BUCK-BOOST digital power supply in accordance with the present invention;
FIG. 8 is a flow chart of system software based on a bi-directional synchronous rectification BUCK-BOOST digital power supply of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
The digital power supply based on the bidirectional synchronous rectification BUCK-BOOST shown in FIG. 1 comprises a BUCK-BOOST main circuit, a MOS tube, an auxiliary power supply, an OLD driving circuit, a signal conditioning circuit, an ADC module and an STM32F334 main control circuit. STM32F334 is used as a main control chip, HRPWM modules of F334 are used for generating required PWM, and MOS tubes are driven by UCC27211 drivers; the signal conditioning circuit and the ADC module collect signals such as input voltage, output voltage and output current, and the collected signals are utilized for operation control so as to achieve the purpose of constant voltage and constant current output. The auxiliary power supply adopts XL7005A, AMS1117-3.0 to respectively convert and generate two paths of power supplies of 12V and 3.3V and supplies power for the MOS driving circuit, the signal conditioning circuit, the OLED driving circuit and the main control chip; the OLED display system is used for displaying information such as working state, output voltage, output current and the like.
As shown in FIG. 2, the bidirectional synchronous rectification BUCK-BOOST circuit topology is formed by cascading a synchronous BUCK circuit and a synchronous BOOST circuit, the bidirectional synchronous rectification BUCK-BOOST circuit realizes the voltage increasing and decreasing function in the same direction, and the MOS tube is used for replacing a rectifier diode in the circuit in the bidirectional synchronous rectification BUCK-BOOST circuit, and the efficiency of a power supply can be remarkably improved due to relatively low voltage drop on the MOS tube when the MOS tube is turned on.
As shown in fig. 3, the MOS transistor driving circuit adopts a half-bridge driving chip UCC27211 with TI having independent high-side and low-side driving, the inside of the chip is integrated with a bootstrap diode, the outside needs to be connected with a bootstrap capacitor, and the high-side MOS transistor is driven in a bootstrap boosting manner; the bootstrap capacitor is 0.47uF, the peak value of the chip driving current is up to 4A, and the maximum guiding voltage is 120V; adding a 10K pull-down resistor on a PWM signal input pin to prevent the misoperation of the MOS tube when the PWM signal is input to be open or high-resistance; the MOS tube driving resistor adopts 2Ω, the chip has no dead zone function, and in order to prevent the upper and lower bridge arms from being conducted when being conducted, the dead zone function needs to be realized on software.
As shown in FIG. 4, the auxiliary power supply is isolated by a diode and is powered from the input end and the output end of the BUCK-BOOST circuit, and is converted by XL7005A to generate direct current 12V, and is converted by AMS1117-3.3 to generate two paths of power supplies of 3.3V and A3.3V; the direct current 12V supplies power to the driving chip to drive the MOS tube to work; DC 3.3V, A3.3V supply power to STM32F334 and the op-amp.
As shown in fig. 5, the input output voltage is scaled down to the range that the ADC module can sample by using the differential circuit through the operational amplifier TLV2374, and then the ADC module is used for sampling, so that the software calculates the output voltage. The input voltage samples are scaled down by an internal op-amp at F334 and sent to the ADC module for sampling.
As shown in fig. 6, the output current detection circuit is implemented by an operational amplifier TLV2374 sampling differential amplification circuit; if the sampling resistor is arranged at the low end and the sampling resistor is arranged at the high end, larger common mode voltage can cause inaccurate sampling current, the sampling resistor is 10mΩ, and the voltage drop on the sampling resistor is smaller due to smaller sampling resistor, so that direct sampling is not facilitated, and the sampling is needed to be carried out after amplification; because the current flows in two directions with positive and negative values in the design, the MCU cannot sample the negative voltage, so that a reference voltage is needed to lift the amplified negative voltage to positive voltage for the MCU to sample; as shown in fig. 7, the reference voltage is divided by 3.3V through 1:1 resistors to generate 1.65V, and the voltage follower output composed of operational amplifier TLV2374 is 1.65V for circuit use.
Pins of the F334 master circuit are shown in table 1.
TABLE 1
The digital power supply adopts a voltage control mode, namely an error signal is generated by comparing the sampled output voltage with the expected output voltage, the error is input into a PID algorithm to calculate the required duty ratio, and the purpose of voltage stabilizing output is achieved by changing the duty ratio. As shown in fig. 8, PID calculation and update of the duty ratio are performed in the interrupt program of the timer 3, and the PID algorithm is divided into an incremental type and a positional type.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (6)
1. The digital power supply is characterized by comprising a BUCK-BOOST main circuit, an MOS tube, an auxiliary power supply, a driving circuit, a signal conditioning circuit, an ADC module and a main control circuit, wherein the main control circuit is used for controlling, the driving circuit drives the MOS tube, the signal conditioning circuit and the ADC module are used for collecting signals of input voltage, output voltage and output current, the collected signals are subjected to operation control, and constant voltage and constant current are output;
the BUCK-BOOST main circuit comprises a first MOS tube and a second MOS tube which are respectively arranged at the input end and the output end of the circuit, an inductor is arranged between the first MOS tube and the second MOS tube, and a third MOS tube and a fourth MOS tube are connected across the two ends of the inductor;
The output current detection circuit of the ADC module is an operational amplifier TLV2374 sampling differential amplification circuit; wherein the sampling resistor is arranged at the low end.
2. The bidirectional synchronous rectification based BUCK-BOOST digital power supply according to claim 1, wherein the BUCK-BOOST main circuit is formed by cascading a synchronous BUCK circuit and a synchronous BOOST circuit.
3. The digital power supply based on bidirectional synchronous rectification BUCK-BOOST according to claim 1, wherein the driving circuit adopts a half-bridge driving chip, a bootstrap diode is integrated inside the chip, and a bootstrap capacitor is connected outside the chip.
4. The bi-directional synchronous rectification BUCK-BOOST based digital power supply according to claim 1, wherein the auxiliary power supply draws power from the input and output of the BUCK-BOOST circuit through diode isolation.
5. The bidirectional synchronous rectification block-BOOST based digital power supply according to claim 1, wherein the signal conditioning circuit is provided with an operational amplifier TLV237, the signal conditioning circuit comprises an input-output voltage detection circuit and an output current detection circuit, the operational amplifier TLV237 uses a differential circuit to reduce the output voltage, the ADC module samples to realize the input-output voltage detection, and the operational amplifier TLV237 samples the differential to realize the input-output current detection.
6. The bidirectional synchronous rectification BUCK-BOOST digital power supply based on claim 1, wherein the master control circuit takes STM32F334 as a master control chip, the driving circuit is a UCC27211 driving circuit, a HRPWM module of the STM32F334 generates PWM, and the UCC27211 driving circuit drives the MOS tube.
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| CN201810768513.5A CN108631593B (en) | 2018-07-13 | 2018-07-13 | BUCK-BOOST digital power supply based on bidirectional synchronous rectification |
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| CN201810768513.5A CN108631593B (en) | 2018-07-13 | 2018-07-13 | BUCK-BOOST digital power supply based on bidirectional synchronous rectification |
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| CN108631593B true CN108631593B (en) | 2024-05-07 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108258886A (en) * | 2017-12-29 | 2018-07-06 | 河南北瑞电子科技有限公司 | A kind of SCM Based single-phase sine-wave inverter |
| CN109672339A (en) * | 2019-02-26 | 2019-04-23 | 上海醇加能源科技有限公司 | A kind of multi-channel digital power supply |
| CN111614255A (en) * | 2020-04-29 | 2020-09-01 | 南宁学院 | Portable voltage converter |
| EP4220197A4 (en) * | 2020-11-30 | 2023-11-29 | Huawei Digital Power Technologies Co., Ltd. | Voltage conversion circuit, voltage converter and electronic device |
| CN115932639A (en) * | 2022-12-05 | 2023-04-07 | 七四九(南京)电子研究院有限公司 | Electronic load DC end control method and system |
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|---|---|---|---|---|
| CN208461697U (en) * | 2018-07-13 | 2019-02-01 | 青岛华勋光电科技有限公司 | One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization |
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| CN208461697U (en) * | 2018-07-13 | 2019-02-01 | 青岛华勋光电科技有限公司 | One kind rectifying BUCK-BOOST digital power based on bi-directional synchronization |
Non-Patent Citations (1)
| Title |
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| 一款双向DC-DC变换器的设计;张一娇;王旭;;实验室科学(04);全文 * |
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