CN111200309A - Bidirectional direct-current charger circuit - Google Patents
Bidirectional direct-current charger circuit Download PDFInfo
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- CN111200309A CN111200309A CN202010031375.XA CN202010031375A CN111200309A CN 111200309 A CN111200309 A CN 111200309A CN 202010031375 A CN202010031375 A CN 202010031375A CN 111200309 A CN111200309 A CN 111200309A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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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
- H02M3/22—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
- H02M3/33569—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 having several active switching elements
- H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a bidirectional direct-current charger circuit, which comprises a bidirectional AC/DC conversion circuit connected with an alternating-current side and a bidirectional DC/DC conversion circuit connected with a direct-current side, wherein the bidirectional AC/DC conversion circuit is connected with the bidirectional DC/DC conversion circuit through a bus; the bidirectional AC/DC conversion circuit comprises a full-bridge switching circuit, and the bidirectional DC/DC conversion circuit comprises a double-half-bridge LLC circuit with a high-frequency transformer; during forward work, under the full-bridge switching circuit work rectification mode, two half-bridges work in power frequency and high frequency mode alternately, and during reverse work, the full-bridge switching circuit works in inversion mode. The two half bridges of the AC/DC circuit work in a power frequency and high frequency alternating state, so that the switching loss can be effectively reduced, and the heating of a switching tube is reduced.
Description
[ technical field ]
The invention relates to a bidirectional direct-current charger, in particular to a bidirectional direct-current charger circuit.
[ background art ]
With the increasing demand of people for outdoor traveling, some alternating current electric equipment needs to be powered outdoors, but the power battery of the electric automobile is direct current. The traditional vehicle-mounted inverter can also provide an output of 220V alternating current, but the power taking mode is that power is taken from a low-voltage storage battery. The stored electric quantity of the low-voltage storage battery is small. Therefore, the vehicle-mounted DC/DC converter needs to firstly take power from the power battery to the low-voltage storage battery, and then convert the power from the low-voltage storage battery to alternating current 220V through the vehicle-mounted inverter to supply power to the vehicle-mounted alternating current power equipment. Energy loss can be brought in the two-stage energy conversion process, and the vehicle-mounted inverter generally has low power which is only hundreds of watts.
The invention with the application number of CN201110167515.7 discloses a vehicle-mounted bidirectional charger for an electric automobile, which comprises: the DC/DC converter is connected with the AC/DC converter through the DC/DC converter; one end of the AC/DC converter is connected with a power grid through a filter circuit, and the other end of the AC/DC converter is connected with the battery pack through the DC/DC converter; and the microprocessor control circuit is respectively connected with the AC/DC converter and the DC/DC converter. The four switching tubes S5, S6, S7 and S8 of the AC/DC converter are driven synchronously, and the switching loss is large.
[ summary of the invention ]
The invention aims to provide a bidirectional direct current charger circuit with low switching loss and low heat generation of an AC/DC converter.
In order to solve the technical problem, the invention adopts the technical scheme that the bidirectional direct current charger circuit comprises a bidirectional AC/DC conversion circuit connected with an alternating current side and a bidirectional DC/DC conversion circuit connected with a direct current side, wherein the bidirectional AC/DC conversion circuit is connected with the bidirectional DC/DC conversion circuit through a bus; the bidirectional AC/DC conversion circuit comprises a full-bridge switching circuit, and the bidirectional DC/DC conversion circuit comprises a double-half-bridge LLC circuit with a high-frequency transformer; during forward work, under the full-bridge switching circuit work rectification mode, two half-bridges work at power frequency and high frequency mode in turn, and during reverse work, the full-bridge switching circuit work under the contravariant mode, two half-bridges work at power frequency and high frequency mode in turn.
When the bidirectional direct current charger circuit works in the forward direction, the first half bridge connected with the bus by the double half-bridge LLC circuit works in a PFM or PWM + Burst mode as a primary side; when a first half bridge of the double-half-bridge LLC circuit works in a PWM + Burst mode, a second half bridge connected with the direct current side is not driven as a secondary side, and body diodes of the switching tubes are used for rectification; when the double-half-bridge LLC circuit works reversely, the second half bridge of the double-half-bridge LLC circuit works in a PFM or PWM + Burst mode as a primary side, the first half bridge of the double-half-bridge LLC circuit is not driven as a secondary side, and the body diode of the switching tube is used for rectification.
When the bidirectional direct current charger circuit works in the forward direction, the full-bridge switching circuit works in the SPWM rectification mode, and the two half bridges alternately work in the power frequency and high frequency modes modulated by the unipolar SPWM; when the two half-bridges work in the power frequency and high-frequency mode modulated by the unipolar SPWM, the two half-bridges work alternately in the SPWM inversion mode.
In the bidirectional dc charger circuit, the double half-bridge LLC circuit with the high-frequency transformer includes a resonant component and a blocking capacitor, where the resonant component includes a resonant inductor and a resonant capacitor; the middle point of the first half bridge of the double-half-bridge LLC circuit is connected in series with the first winding of the high-frequency transformer through the resonance part, and the middle point of the second half bridge of the double-half-bridge LLC circuit is connected in series with the second winding of the high-frequency transformer through the blocking capacitor.
The bidirectional direct current charger circuit, the bidirectional AC/DC conversion circuit include an inductor, the midpoint of the first half-bridge of the full-bridge switching circuit is connected to the first alternating current terminal through the inductor, and the midpoint of the second half-bridge of the full-bridge switching circuit is connected to the second alternating current terminal.
When the bidirectional direct current charger circuit is in forward heavy load, the switching tube of the second half bridge of the double-half-bridge LLC circuit is synchronously rectified along with the switching tube of the first half bridge of the double-half-bridge LLC circuit, PFM frequency modulation is adopted, the adjusting range of the switching frequency is between the minimum switching frequency and the maximum switching frequency, and the duty ratio is fixed to the maximum value.
In the bidirectional direct current charger circuit, when the bidirectional direct current charger circuit is in forward light load or no load, the switching tube of the first half bridge of the double-half-bridge LLC circuit is modulated by PWM duty ratio; keeping the switching frequency as the maximum switching frequency, and adjusting the duty ratio change range between the maximum value and the minimum value.
According to the bidirectional direct current charger circuit, when the bidirectional direct current charger circuit is in a forward light load or no load state, the switching tube of the first half bridge of the double-half-bridge LLC circuit is modulated by the PWM pulse Burst, the switching frequency is kept to be the maximum switching frequency during the PWM pulse Burst modulation period, and the PWM duty ratio is kept to be the minimum value.
The two half-bridges of the AC/DC circuit of the bidirectional direct current charger circuit work in a power frequency and high frequency alternating state, so that the switching loss can be effectively reduced, and the heating of a switching tube is reduced.
[ diagram ] A
The present invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is an outline view of a bidirectional dc charger according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a bidirectional dc charger circuit according to an embodiment of the invention.
FIG. 3 is a driving waveform diagram of a bidirectional AC/DC full bridge circuit according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating the heavy-duty driving waveforms and current-voltage mapping of the bidirectional DC/DC circuit according to the embodiment of the present invention.
FIG. 5 is a waveform diagram of the driving of the first half-bridge switching tube of the bidirectional DC/DC circuit under light load or no load.
Wherein A) is PWM duty ratio modulation, and B) is PWM pulse Burst modulation.
Fig. 6 is a modulation gain diagram for a bi-directional DC/DC circuit in accordance with an embodiment of the present invention.
[ detailed description of the invention ]
As shown in fig. 1, the bidirectional low-power dc charger according to the embodiment of the present invention is composed of three parts: an alternating current plug and cable 10, a bidirectional low-power direct current charger main body 20, a direct current charging gun head and cable 30. The alternating current plug and cable 10 and the direct current charging gun head and cable 30 are respectively connected with an alternating current side port and a direct current side port of the bidirectional low-power direct current charger main body. When the bidirectional low-power direct-current charger works in the forward direction, single-phase alternating current obtained by the alternating-current plug and the cable 10 is converted into direct current by the power conversion circuit of the bidirectional low-power direct-current charger, and the direct current is used for charging a power battery of the electric automobile by the direct-current charging gun head and the cable 30. When the bidirectional low-power direct-current charger works reversely, direct current of a power battery can be obtained through the direct-current gun head and the cable 30, converted into alternating current through a power conversion circuit of the bidirectional low-power direct-current charger, and supplied to electric equipment on an alternating-current side through the alternating-current plug and the cable 10.
As shown in fig. 2, the bidirectional low-power DC charger circuit according to the embodiment of the present invention mainly includes two stages, one stage is a bidirectional AC/DC conversion circuit and adopts a full-bridge switching circuit, the other stage is a bidirectional DC/DC conversion circuit and adopts a double half-bridge LLC circuit with a high-frequency transformer. The DC sides of the two-stage circuit are connected through a bus capacitor.
When the AC/DC full-bridge switching circuit works in the SPWM rectification mode in the forward direction, the single-phase alternating current at the alternating current port is modulated into the direct current of the bus. Two half-bridges of the full-bridge switching circuit alternately work under the power frequency and high-frequency mode modulated by the unipolar SPWM, so that each switching tube can uniformly heat, and half of switching loss can be reduced compared with a single-machine frequency multiplication SPWM modulation mode. The first half bridge of the DC/DC LLC can work in a PFM + PWM + Burst working mode as a primary side. Under the heavy load condition, the LLC primary side of the DC/DC half bridge works in a PFM frequency modulation mode to adjust transmission gain, and the second half bridge is used as a secondary side to carry out synchronous rectification. Under a light load or no-load mode, the first half bridge of the DC/DC LLC serves as a primary side and works in a PFM frequency modulation mode or a PWM pulse Burst mode, the second half bridge serves as a secondary side half bridge and is not driven, a body diode is used for rectification, and the direct current output side charges a power battery.
When the power battery works reversely, the second half bridge works in a PFM + PWM + Burst working mode as a primary side, and the first half bridge works in a rectification mode to convert the voltage of the power battery into the voltage of a direct current bus. The AC/DC full bridge switching circuit works in an SPWM inversion mode, and modulates the voltage of a direct-current bus into single-phase alternating current to be output. Two half bridges of the full-bridge switch alternately work in a unipolar SPWM modulation power frequency and high-frequency mode.
As shown in fig. 2, the AC side of the bidirectional AC/DC full bridge circuit 21 is connected to an AC terminal, and the AC side is connected to a full bridge switching circuit composed of 4 switching tubes Q1, Q2, Q3, and Q4 through an AC inductor L1. The DC side of the bi-directional AC/DC full bridge circuit is connected to bus capacitor C1. One side of the bidirectional DC/DC double half-bridge LLC circuit 22 is connected with a DC bus capacitor C1, and the other side is connected with a capacitor C3 of a DC port. The bus capacitor C1 is connected to a first half bridge circuit 220 composed of switching tubes Q5 and Q6, and the midpoint of the first half bridge circuit 220 is connected in series to the first winding of the high-frequency transformer T1 via a resonance block 221. The resonance section 221 is composed of a resonance inductance Lr and a resonance capacitance Cr. The second winding of the high frequency transformer T1 is connected to the midpoint of the second half bridge circuit 224 via a dc blocking capacitor C2. The second half-bridge circuit 224 is composed of switching tubes Q7, Q8. The dc terminal of the second half-bridge circuit is connected to a dc port capacitor C3.
In forward operation, the bidirectional AC/DC full bridge circuit 21 operates in the SPWM rectification mode. Fig. 3 shows the driving waveform of the AC/DC full bridge switch tube of the embodiment corresponding to the AC input voltage. The switching tubes Q1 and Q2 of the first half bridge and the Q3 and Q4 of the second half bridge are divided into two stages to work alternately in a power frequency mode and a high frequency mode. Compare in fixed two switch tube work at the high frequency, two switch tube work at the power frequency, this kind of drive mode in turn can let the loss of every switch tube approximately equal, is favorable to the heat even. Compared with the driving of four switching tubes which are all operated in a high-frequency mode, the switching loss of the switching tubes can be reduced by half. The forward operation converts the energy on the alternating current side into the direct current energy of the direct current bus.
When the alternating-current/direct-current (AC/DC) full-bridge circuit works in a Sinusoidal Pulse Width Modulation (SPWM) inversion mode, the wave generating mode of the alternating-current/direct-current (AC/DC) full-bridge circuit is consistent with the forward direction, and a power frequency and high frequency alternating working mode is also adopted. The reverse operation inverts the DC energy of the DC bus into single-phase AC at the AC side for output.
In forward operation, the first half-bridge switch 220 of the bi-directional DC/DC half-bridge circuit 22 acts as an input side switch and the resonant component 221 participates in resonance. The secondary side second half-bridge switch 224 operates in a rectifying mode. The dc blocking capacitor C2 is mainly used to prevent magnetic saturation caused by bias of the high frequency transformer. The forward work converts the energy of the direct current bus into the energy of a direct current port and outputs the energy to the power battery of the electric automobile for charging.
In fig. 4, the driving waveforms of the first half-bridge switching transistor and the second half-bridge switching transistor of the bidirectional DC/DC half-bridge circuit 22, and the waveforms of the primary current Ip and the secondary current Is are shown under a heavy load in the forward operation. At this time, the driving of the second half-bridge switching tubes Q7 and Q8 follows the driving of the first half-bridge switching tubes Q5 and Q6 to perform synchronous rectification. The modulation at this time is PFM frequency modulation, the switching frequency fs is adjusted within a range fmin (minimum switching frequency) < fs < fmax (maximum switching frequency), and the duty ratio is unchanged by 50% at maximum.
In fig. 5, two modulation modes of the first half-bridge switching tube of the bidirectional DC/DC half-bridge circuit 22 are shown in forward operation with light load or no load. A) in fig. 5 shows the modulation as PWM duty cycle modulation. Keeping the switching frequency at the maximum switching frequency fmax, and the duty ratio variation range Dmin < D < Dmax. In this embodiment, the minimum duty ratio Dmin is 0.3, and the maximum duty ratio Dmax is 0.5. B) in fig. 5 shows that the modulation is PWM pulse Burst modulation, where the Burst period is 5 switching periods and the number of Burst pulses is 4, so that the Burst value is 4/5 ═ 0.8. During the PWM pulse Burst modulation, the transmission gain of the circuit can be adjusted to 0 by keeping the switching frequency at the maximum switching frequency, keeping the PWM duty ratio at the minimum 0.3 and adjusting the Burst value from the maximum 1 to the minimum 0.
Fig. 6 shows the modulation method and gain range of a bi-directional DC/DC double half-bridge LLC circuit in the full-to-empty load range. The control method of the reverse operation is kept the same as that of the forward operation. Under different load conditions, the change of transmission gain is realized through frequency modulation PFM control, PWM duty ratio control and PWM pulse Burst control of an input side switch. The output side switch drives the follow input side switch to carry out synchronous rectification when in heavy load, and utilizes the body diode to carry out rectification when in light load or no load.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Variations, modifications, substitutions and alterations of the above-described embodiments may occur to those of ordinary skill in the art without departing from the scope of the present invention.
The bidirectional low-power direct-current charger circuit can work in a forward mode, and converts single-phase alternating current into direct current to charge a power battery; and the power battery works in a reverse mode, and the direct current of the power battery is converted into single-phase alternating current to supply power to alternating current electric equipment. Two half-bridges of a bidirectional AC/DC circuit of the bidirectional low-power direct-current charger circuit work in a power frequency and high-frequency alternating state, so that the switching loss can be effectively reduced, and each switching tube is low in heating. The bidirectional DC/DC circuit can realize transmission gain adjustment from no load to full load through a PFM or PWM + Burst modulation mode. The secondary side switching tube works in a synchronous rectification state when in heavy load, so that the loss can be reduced, and the conversion efficiency is improved.
Claims (8)
1. A bidirectional direct current charger circuit is characterized by comprising a bidirectional AC/DC conversion circuit connected with an alternating current side and a bidirectional DC/DC conversion circuit connected with a direct current side, wherein the bidirectional AC/DC conversion circuit is connected with the bidirectional DC/DC conversion circuit through a bus; the bidirectional AC/DC conversion circuit comprises a full-bridge switching circuit, and the bidirectional DC/DC conversion circuit comprises a double-half-bridge LLC circuit with a high-frequency transformer; during forward work, under the full-bridge switching circuit work rectification mode, two half-bridges work at power frequency and high frequency mode in turn, and during reverse work, the full-bridge switching circuit work under the contravariant mode, two half-bridges work at power frequency and high frequency mode in turn.
2. The bidirectional direct current charger circuit of claim 1, wherein during forward operation, the first half-bridge of the double half-bridge LLC circuit connected to the bus operates as a primary side in PFM or PWM + Burst mode; when a first half bridge of the double-half-bridge LLC circuit works in a PWM + Burst mode, a second half bridge connected with the direct current side is not driven as a secondary side, and body diodes of the switching tubes are used for rectification; when the double-half-bridge LLC circuit works reversely, the second half bridge of the double-half-bridge LLC circuit works in a PFM or PWM + Burst mode as a primary side, the first half bridge of the double-half-bridge LLC circuit is not driven as a secondary side, and the body diode of the switching tube is used for rectification.
3. The bidirectional direct-current charger circuit of claim 1, wherein during forward operation, the full-bridge switching circuit operates in an SPWM rectification mode, and the two half-bridges alternately operate in a single-polarity SPWM-modulated power frequency and high-frequency mode; when the two half-bridges work in the power frequency and high-frequency mode modulated by the unipolar SPWM, the two half-bridges work alternately in the SPWM inversion mode.
4. The bidirectional DC charger circuit of claim 2, wherein the double half-bridge LLC circuit with the high-frequency transformer comprises a resonance component and a DC blocking capacitor, the resonance component comprises a resonance inductor and a resonance capacitor; the middle point of the first half bridge of the double-half-bridge LLC circuit is connected in series with the first winding of the high-frequency transformer through the resonance part, and the middle point of the second half bridge of the double-half-bridge LLC circuit is connected in series with the second winding of the high-frequency transformer through the blocking capacitor.
5. The bidirectional DC charger circuit of claim 1, wherein the bidirectional AC/DC converter circuit includes an inductor, and wherein a midpoint of a first half-bridge of the full-bridge switching circuit is coupled to the first AC terminal via the inductor, and a midpoint of a second half-bridge of the full-bridge switching circuit is coupled to the second AC terminal.
6. The bidirectional dc charger circuit of claim 2, wherein during forward heavy load, the switching tube of the second half-bridge of the double half-bridge LLC circuit is synchronously rectified with the switching tube of the first half-bridge of the double half-bridge LLC circuit, and PFM frequency modulation is used, the switching frequency is adjusted between a minimum switching frequency and a maximum switching frequency, and the duty cycle is fixed to a maximum value.
7. The bidirectional direct current charger circuit of claim 1, wherein, during a forward light load or no load, the switching tube of the first half-bridge of the double half-bridge LLC circuit is modulated with a PWM duty cycle; keeping the switching frequency as the maximum switching frequency, and adjusting the duty ratio change range between the maximum value and the minimum value.
8. The bidirectional DC charger circuit of claim 2, wherein during forward light load or no load, the switching transistor of the first half-bridge of the double half-bridge LLC circuit is modulated with a PWM pulse Burst, and during the PWM pulse Burst modulation, the switching frequency is maintained at a maximum switching frequency and the PWM duty cycle is maintained at a minimum value.
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| CN202010031375.XA CN111200309A (en) | 2020-01-13 | 2020-01-13 | Bidirectional direct-current charger circuit |
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| CN202010031375.XA CN111200309A (en) | 2020-01-13 | 2020-01-13 | Bidirectional direct-current charger circuit |
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| CN111200309A true CN111200309A (en) | 2020-05-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865263A (en) * | 2021-03-15 | 2021-05-28 | 阳光电源股份有限公司 | Charging and discharging control method and application device |
| CN113424426A (en) * | 2020-10-14 | 2021-09-21 | 深圳欣锐科技股份有限公司 | Bidirectional resonance circuit and automobile |
| EP3934081A1 (en) * | 2020-07-03 | 2022-01-05 | Raytheon Systems Limited | Bridge rectifier operation and power fator correction circuit |
| EP4195484A1 (en) * | 2021-12-08 | 2023-06-14 | Huawei Digital Power Technologies Co., Ltd. | Bidirectional direct current converter and control method thereof |
| CN116345943A (en) * | 2023-03-09 | 2023-06-27 | 深圳市正浩创新科技股份有限公司 | Control method and device of AC/DC conversion circuit and readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980975A (en) * | 2019-03-20 | 2019-07-05 | 中山职业技术学院 | High-frequency inverter and its Unipolar sinusoidal pulse width modulation method, computer readable storage medium |
| CN110509796A (en) * | 2019-08-30 | 2019-11-29 | 深圳市高斯宝电气技术有限公司 | A kind of vehicle-mounted bidirectional charger circuit of electric car |
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2020
- 2020-01-13 CN CN202010031375.XA patent/CN111200309A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980975A (en) * | 2019-03-20 | 2019-07-05 | 中山职业技术学院 | High-frequency inverter and its Unipolar sinusoidal pulse width modulation method, computer readable storage medium |
| CN110509796A (en) * | 2019-08-30 | 2019-11-29 | 深圳市高斯宝电气技术有限公司 | A kind of vehicle-mounted bidirectional charger circuit of electric car |
Non-Patent Citations (1)
| Title |
|---|
| 冯兴田 等: ""基于负载匹配的三相交错并联LLC谐振变换器变模式控制策略"", 《电力自动化设备》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3934081A1 (en) * | 2020-07-03 | 2022-01-05 | Raytheon Systems Limited | Bridge rectifier operation and power fator correction circuit |
| GB2596801B (en) * | 2020-07-03 | 2023-01-04 | Raytheon Systems Ltd | Bridge rectifier operation and power factor correction circuit |
| US11606025B2 (en) | 2020-07-03 | 2023-03-14 | Raytheon Systems Limited | Bridge rectifier operation and power factor correction circuit |
| CN113424426A (en) * | 2020-10-14 | 2021-09-21 | 深圳欣锐科技股份有限公司 | Bidirectional resonance circuit and automobile |
| CN112865263A (en) * | 2021-03-15 | 2021-05-28 | 阳光电源股份有限公司 | Charging and discharging control method and application device |
| EP4195484A1 (en) * | 2021-12-08 | 2023-06-14 | Huawei Digital Power Technologies Co., Ltd. | Bidirectional direct current converter and control method thereof |
| CN116345943A (en) * | 2023-03-09 | 2023-06-27 | 深圳市正浩创新科技股份有限公司 | Control method and device of AC/DC conversion circuit and readable storage medium |
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