CN107070200B - Resonance apparatus - Google Patents
Resonance apparatus Download PDFInfo
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- CN107070200B CN107070200B CN201710139615.6A CN201710139615A CN107070200B CN 107070200 B CN107070200 B CN 107070200B CN 201710139615 A CN201710139615 A CN 201710139615A CN 107070200 B CN107070200 B CN 107070200B
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
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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
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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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- 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
- H02M3/33592—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 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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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
Abstract
An embodiment of the present application provides a resonance apparatus, including: a bidirectional resonance unit including: the series circuit comprises a first capacitor and a first inductor connected with the first capacitor in series, a first end of the series circuit is connected with a first end of the bidirectional resonance unit, and a second end of the series circuit is connected with a third end of the bidirectional resonance unit; the bidirectional resonance unit further includes: a first end of the second inductor is connected with a first end of the bidirectional resonance unit, and a second end of the second inductor is connected with a second end of the bidirectional resonance unit; and a first end of the third inductor is connected with a third end of the bidirectional resonance unit, and a second end of the third inductor is connected with a fourth end of the bidirectional resonance unit. The resonance equipment of the embodiment of the application can realize the boosting function under the forward working mode and the reverse working mode, so that the utilization rate of the circuit is improved.
Description
Technical Field
The embodiments of the present application relate to the field of electronics, and more particularly, to a resonance apparatus.
Background
With the development of battery technology, the electric motor is widely used, and electric automobiles and electric products are more and more, and people's lives begin to be popularized, but basically, one battery is arranged in the electric equipment, the battery is a single battery when the battery is small, and the battery pack is used for storing electric quantity of several degrees to dozens of degrees when the battery pack is large. The most common function of the charger is to convert 220V or 380V ac into dc required by the battery pack, and then charge the battery pack through the battery management system.
However, as the electric quantity of the battery pack is larger and larger, when the electric quantity reaches dozens of degrees of electricity, another new application requirement is generated, namely, the electric quantity in the battery pack is reversely output, and the direct current of the battery pack is reversely converted into the 220V or 380V alternating current which is used by people at ordinary times. The conventional resonant equipment can realize bidirectional energy transfer, but is limited by a topological structure, only a forward working mode can realize a boosting function, and a reverse working mode cannot realize the boosting function.
Disclosure of Invention
The embodiment of the application provides a resonance device, and the function of boosting can be realized under a forward working mode and a reverse working mode.
In a first aspect, there is provided a resonant device comprising: a bidirectional resonant unit, a first end of the bidirectional resonant unit being connected to a positive electrode of a forward input voltage source of the resonant device, a second end of the bidirectional resonant unit being connected to a negative electrode of the forward input voltage source, a third end of the bidirectional resonant unit being connected to a first end of a first load, a fourth end of the bidirectional resonant unit being connected to a second end of the first load,
or a first end of the bidirectional resonance unit is connected with a first end of the first load, a second end of the bidirectional resonance unit is connected with a second end of the first load, a third end of the bidirectional resonance unit is connected with a positive electrode of a reverse input voltage source of the resonance device, and a fourth end of the bidirectional resonance unit is connected with a negative electrode of the reverse input voltage source;
the bidirectional resonance unit includes: a series circuit comprising a first capacitor (101) and a first inductor (102) connected in series with the first capacitor, a first end of the series circuit being connected with a first end of the bidirectional resonant unit, a second end of the series circuit being connected with a third end of the bidirectional resonant unit;
the bidirectional resonance unit further includes:
a second inductor (103), a first end of the second inductor being connected to a first end of the bidirectional resonant unit, a second end of the second inductor being connected to a second end of the bidirectional resonant unit;
and a third inductor (104), wherein a first end of the third inductor is connected with a third end of the bidirectional resonant unit, and a second end of the third inductor is connected with a fourth end of the bidirectional resonant unit.
Specifically, the bidirectional resonant unit includes first end, second end, third end and fourth end, works as the first end and the second end of bidirectional resonant unit are when the voltage input end of bidirectional resonant unit, the third end and the fourth end of bidirectional resonant unit are the voltage output end of bidirectional resonant unit, works as the third end and the fourth end of bidirectional resonant unit are when the voltage input end of bidirectional resonant unit, the first end and the second end of bidirectional resonant unit are the voltage output end of bidirectional resonant unit. Therefore, the bidirectional resonant unit includes two operation modes of forward and reverse.
The rise and fall of the voltage by the resonant device depends on the frequency of the voltage input at the voltage input. Assuming that the operating frequency of the circuit is Fs, the series resonance frequency of the first capacitor and the first inductor is F1, the series resonance frequency of the first capacitor, the first inductor and the third inductor is F2, the series resonance frequency of the first capacitor, the first inductor and the second inductor is F3, and the gain of the circuit is G. In a forward working mode, the second inductor does not participate in resonance, when Fs is larger than or equal to F1, the circuit is in a voltage reduction mode, and when Fs is larger than or equal to F2 and smaller than or equal to F1, the circuit is in a voltage boosting mode; in a reverse working mode, the third inductor does not participate in resonance, when Fs is larger than or equal to F1, the circuit is in a voltage reduction mode, and when Fs is larger than or equal to F3 and smaller than or equal to F1, the circuit is in a voltage boosting mode.
The resonance equipment of the embodiment of the application can realize the bidirectional boosting function in the forward working mode and the reverse working mode by adjusting the frequency of the input voltage, thereby improving the utilization rate of the circuit.
It should be understood that the resonance device in the embodiment of the present application may be a vehicle-mounted battery charger, and may also be other devices such as a photovoltaic generator, which is not limited in the embodiment of the present application.
In a first possible implementation manner of the first aspect, the bidirectional resonant unit further includes:
and a second capacitor (105), wherein a first end of the second capacitor is connected with a second end of the second inductor, and a second end of the second inductor is connected with a second end of the bidirectional resonance unit through the second capacitor.
With reference to the foregoing possible implementation manners of the first aspect, in a second possible implementation manner of the first aspect, the bidirectional resonant unit further includes:
and a third capacitor (106), wherein a first end of the third capacitor is connected with a second end of the third inductor, and a second end of the third inductor is connected with a fourth end of the bidirectional resonance unit through the third capacitor.
Therefore, in the forward working mode, the first capacitor, the first inductor, the third capacitor and the third inductor participate in resonance, and the second capacitor and the second inductor do not participate in resonance and only serve for providing excitation current; in the reverse operation mode, the first capacitor, the first inductor, the second capacitor and the second inductor participate in resonance, and the third capacitor and the third inductor do not participate in resonance and only serve to provide excitation current.
The resonance equipment of the embodiment of the application can improve the boosting capacity of the circuit on the basis of realizing the bidirectional boosting function in the forward working mode and the reverse working mode, thereby improving the efficiency of the circuit and the flexibility of design.
With reference to the foregoing possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the resonance device further includes:
a first end and a second end of the isolation transformer are respectively connected with the anode and the cathode of the positive input voltage source, a third end and a fourth end of the isolation transformer are respectively connected with the first end and the second end of the bidirectional resonance unit,
the isolation transformer is used for:
and converting the direct current voltage of the forward input voltage source into alternating current voltage and outputting the alternating current voltage to the bidirectional resonance unit.
It should be understood that the isolation transformer may be a single-winding transformer, or may be a multi-winding transformer, which is not limited in this embodiment of the present application. The position of the isolation transformer in the topology may be at an input position of the circuit, may be at an output position of the circuit, and may also be in the middle of the bidirectional resonant unit, which is not limited in the embodiments of the present application.
With reference to the foregoing possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the isolation transformer is a multi-winding transformer, and the isolation transformer further includes: the fifth end and the sixth end of the isolation transformer are respectively connected with the first end and the second end of the second load;
the isolation transformer is further configured to:
and converting the direct-current voltage of the forward input voltage source into alternating-current voltage and outputting the alternating-current voltage to the second load.
It should be understood that the voltages at the fifth terminal and the sixth terminal of the multi-winding transformer are not affected by the change of the frequency because the voltages are obtained only by the multi-winding transformer and not by the bidirectional resonant unit, and are only affected by the transformation ratio and the magnitude of the input voltage of the multi-winding transformer. Therefore, no matter how the voltage frequency changes in the forward direction and the reverse direction, a fixed auxiliary source voltage can be obtained as long as the voltage of the input multi-winding transformer is ensured to be consistent, and the method is very suitable for application occasions with the requirements.
The resonant equipment of the embodiment of the application can save the design of the auxiliary power supply and save the cost after the auxiliary winding is added to the isolation transformer.
With reference to the foregoing possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the resonance device further includes:
a first FM generating unit and a first rectifying unit, wherein a first terminal and a second terminal of the first FM generating unit are respectively connected with a positive electrode and a negative electrode of the forward input voltage source, a third terminal and a fourth terminal of the first FM generating unit are respectively connected with a first terminal and a second terminal of the isolation transformer, a third terminal and a fourth terminal of the bidirectional resonant unit are respectively connected with a first terminal and a second terminal of the first rectifying unit, a third terminal and a fourth terminal of the first rectifying unit are respectively connected with a first terminal and a second terminal of the first load,
the first FM generation unit is configured to:
converting the direct-current voltage of the forward input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the isolation transformer;
the first rectifying unit is used for:
and converting the alternating current voltage output by the bidirectional resonance unit into direct current voltage and outputting the direct current voltage to the first load.
It should be understood that the partial unit is generally composed of metal-oxide-semiconductor field-effect transistors (MOSFETs), including but not limited to half-bridge MOSFETs and full-bridge MOSFETs. The first FM generation unit is configured to generate a frequency-modulated (FM) dc pulse wave by switching an input dc voltage with a 50% duty ratio when the input dc voltage is input in the forward direction, and input the frequency-modulated (FM) dc pulse wave to the bidirectional resonance unit. The first rectifying unit is used for performing output rectification by using a MOSFET body diode when the output voltage is output in the forward direction, so that the alternating-current voltage output by the isolation transformer is changed into direct-current voltage.
With reference to the foregoing possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the resonance device further includes:
a second FM generation unit and a second rectification unit, wherein a third terminal and a fourth terminal of the second FM generation unit are respectively connected to the positive electrode and the negative electrode of the reverse input voltage source, a first terminal and a second terminal of the second FM generation unit are respectively connected to the third terminal and the fourth terminal of the bidirectional resonance unit, a first terminal and a second terminal of the isolation transformer are respectively connected to the third terminal and the fourth terminal of the second rectification unit, and a first terminal and a second terminal of the second rectification unit are respectively connected to a first terminal and a second terminal of a third load,
the second FM generation unit is configured to:
converting the direct-current voltage of the reverse input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the bidirectional resonance unit;
the isolation transformer is further configured to:
converting the direct-current pulse voltage output by the bidirectional resonance unit into alternating-current voltage and outputting the alternating-current voltage to the second rectifying unit;
the second rectifying unit is used for:
and converting the alternating current voltage output by the isolation transformer into direct current voltage and outputting the direct current voltage to the third load.
It should be understood that the first FM generation unit and the second FM rectification unit may be two independent units or may be integrated into one unit, and the second FM generation unit and the first FM rectification unit may be two independent units or may be integrated into one unit, which is not limited in this embodiment of the present application.
With reference to the foregoing possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the resonance device further includes:
an FM control unit connected to the first FM generation unit and the second FM generation unit,
the FM control unit is used for:
and determining the voltage input direction of the bidirectional resonance unit, and inputting the direct-current pulse voltage to the first FM generation unit or inputting the direct-current pulse voltage to the second FM generation unit according to the voltage input direction.
With reference to the foregoing possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, at least one of the first inductor, the second inductor, and the third inductor is a single magnetic inductor or a magnetic integrated inductor.
With reference to the foregoing possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the resonance apparatus further includes: a voltage sampling and error amplifying unit connected with the FM controller and the first load or the third load, the FM control unit further configured to: generating a reference voltage and transmitting the reference voltage to the voltage sampling and error amplifying unit; the voltage sampling and error amplifying unit is used for: acquiring direct-current voltage output by the first load or the third load, comparing the direct-current voltage with the reference voltage to obtain a first error amplification value, and transmitting the first error amplification value to the FM control unit; the FM control unit is further configured to: and adjusting the frequency of the direct current voltage output by the FM according to the first error amplification value.
Drawings
Fig. 1 is a schematic circuit diagram of a resonance device provided in an embodiment of the present application.
Fig. 2 is a schematic circuit diagram of another resonance device provided in the embodiment of the present application.
Fig. 3 is a schematic diagram of an equivalent circuit of a resonant device in a forward operation mode according to an embodiment of the present application.
Fig. 4 is a graph of normalized gain of the resonant device in the forward operation mode according to the embodiment of the present application.
Fig. 5 is a schematic diagram of an equivalent circuit of a resonant device in a reverse operation mode according to an embodiment of the present application.
Fig. 6 is a graph of normalized gain of the resonant device in the reverse operation mode according to the embodiment of the present application.
Fig. 7 is a schematic circuit diagram of another resonance device provided in the embodiments of the present application.
Fig. 8 is a schematic circuit diagram of another resonance device provided in the embodiments of the present application.
Fig. 9 is a circuit schematic diagram of a bidirectional topology connection of a resonance device according to an embodiment of the present application.
Fig. 10 is a schematic diagram of another bidirectional topological connection of a resonance device provided in an embodiment of the present application.
Fig. 11 is a control block diagram of a resonance device provided in an embodiment of the present application.
Fig. 12 is a control block diagram of another resonance device provided in the embodiment of the present application.
Fig. 13 is a schematic circuit diagram of another resonance device employing two phases connected in parallel according to an embodiment of the present application.
Reference numerals:
101-first capacitance
102-first inductance
103-second inductance
104-third inductance
105-second capacitance
106-third capacitance
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that in the following description, when two elements are "connected," the two elements may be directly connected or indirectly connected through one or more intervening elements/media. The manner in which the two elements are connected may include a contact manner or a non-contact manner, or may include a wired manner or a wireless manner. Equivalent substitutions or modifications of the example connection methods described below may be made by those skilled in the art, and such substitutions or modifications are intended to be within the scope of the present application.
Fig. 1 shows a schematic circuit diagram of a resonance device 100 provided in an embodiment of the present application, where the resonance device 100 includes:
a bidirectional resonant unit 110, a first end (a) of which is connected to a positive electrode of a forward input voltage source of the resonant device, a second end (b) of which is connected to a negative electrode of the forward input voltage source, a third end (c) of which is connected to a first end of a first load, and a fourth end d of which is connected to a second end of the first load,
or a first end (a) of the bidirectional resonance unit is connected with a first end of the first load, a second end (b) of the bidirectional resonance unit is connected with a second end of the first load, a third end (c) of the bidirectional resonance unit is connected with the positive pole of a reverse input voltage source of the resonance equipment, and a fourth end (d) of the bidirectional resonance unit is connected with the negative pole of the reverse input voltage source;
the bidirectional resonance unit includes: a series circuit comprising a first capacitance Cr (101) and a first inductance Lr (102) connected in series with the first capacitance, a first end of the series circuit being connected with a first end (a) of the bidirectional resonant unit, a second end of the series circuit being connected with a third end (c) of the bidirectional resonant unit;
the bidirectional resonance unit further includes:
a second inductance Lm1(103), a first end of the second inductance being connected to a first end (a) of the bidirectional resonant unit, a second end of the second inductance being connected to a second end (b) of the bidirectional resonant unit;
and a third inductor Lm2(104), wherein a first end of the third inductor is connected with a third end (c) of the bidirectional resonance unit, and a second end of the third inductor is connected with a fourth end (d) of the bidirectional resonance unit.
Specifically, as shown in fig. 1, the bidirectional resonant unit includes a first terminal (a), a second terminal (b), a third terminal (c), and a fourth terminal (d), where the first terminal and the second terminal are Vdc, and the third terminal and the fourth terminal are Vdc2, and the first terminal and the second terminal, the third terminal, and the fourth terminal of the bidirectional resonant unit may be respectively used as an input terminal or an output terminal of the bidirectional resonant unit. Specifically, when the first end and the second end of the bidirectional resonant unit are the voltage input ends of the bidirectional resonant unit, the third end and the fourth end of the bidirectional resonant unit are the voltage output ends of the bidirectional resonant unit, and when the third end and the fourth end of the bidirectional resonant unit are the voltage input ends of the bidirectional resonant unit, the first end and the second end of the bidirectional resonant unit are the voltage output ends of the bidirectional resonant unit. Therefore, the bidirectional resonant unit includes two operation modes of forward and reverse. Therefore, Vdc1 in the embodiment of the present application may be used as an input terminal in the forward operation mode or an output terminal in the reverse operation mode, and Vdc2 may be used as an output terminal in the forward operation mode or an input terminal in the reverse operation mode, which is not limited in the embodiment of the present application. It is understood that the forward mode of operation herein refers to energy transfer from Vdc1 to Vdc2 and the reverse mode of operation refers to energy transfer from Vdc2 to Vdc 1. Accordingly, the bidirectional resonant cell may boost a first voltage of Vdc1 in the forward operation mode and output a second voltage at Vdc2, and may boost a third voltage of Vdc2 in the reverse operation mode and output a fourth voltage at Vdc 1.
In the forward mode of operation, Cr, Lr, and Lm2 are engaged in resonance, Lml is not engaged in resonance,only for supplying excitation current. It will be appreciated that the rise and fall of the voltage by the resonant device is dependent on the frequency of the voltage input at the input. The operating frequency of the circuit is Fs, i.e. the frequency of the input voltage Vdc1, the series resonance frequency of Cr and Lr is F1, the series resonance frequency of Cr, Lr and Lm2 is F2, the circuit gain is G, wherein,
when Fs is larger than or equal to F1, the circuit is in a voltage reduction mode, voltage drop is generated on equivalent impedance formed by series connection of Cr and Lr, namely, a part of input voltage is divided, so that the voltage obtained by the output voltage Vdc2 is smaller than Vdcl, the gain G is smaller than 1, and the output voltage Vdc2 is lower than the input voltage Vdcl; when F2 ≦ Fs ≦ F1, the circuit is in boost mode, Lm2 participates in resonance, it supplies the exciting current during the first part of each cycle, and Cr, Lr, Lm2 generates series resonance during the latter part of each cycle, the energy stored on Lm2 is transferred to Cr, so that the voltage on Cr rises, Cr and Lr are output in series during the first part of the next cycle, therefore the output voltage will rise, thus realizing that the output voltage Vdc2 is greater than Vdc1, the gain G is greater than 1, the output voltage Vdc2 is greater than the input voltage Vdc 1; when Fs is less than or equal to F2, the switching tube cannot realize Zero Voltage Switching (ZVS), so the frequency Fs of the input voltage is forbidden to be less than F2.
Similarly, in the reverse mode of operation, Cr, Lr, and Lm1 are involved in resonance, and Lm2 is not involved in resonance and is used only to provide excitation current. The operating frequency of the circuit is Fs, i.e. the frequency of the input voltage Vdc2, the series resonance frequency of Cr and Lr is F1, the series resonance frequency of Cr, Lr and Lm1 is F3, the circuit gain is G, wherein,
when F1 of Fs, the circuit is in a buck mode, the gain G is less than 1, the output voltage Vdc1 is lower than the input voltage Vdc 2; when F3 is less than or equal to Fs less than or equal to F1, the circuit is in a boosting mode, the gain G is greater than 1, and the output voltage Vdcl is higher than the input voltage Vdc 2; when Fs is less than or equal to F3, the switching tube can not realize ZVS, therefore, the frequency Fs of the input voltage is forbidden to be less than F3.
It should be understood that the soft switching technology utilizes the resonance principle of inductive and capacitive elements to make the voltage drop across the power switching device zero before switching on, and to make the current in the power switching device drop to zero before switching off, so as to realize zero-loss switching on and off of the power switching device and reduce the switching stress. With the development of communication technology and power systems, higher requirements are placed on the performance, weight, volume, efficiency and reliability of switching power supplies and power-operated power supplies for communication. The soft switching technology can realize zero-voltage switching or zero-current switching of the switching tube, reduce switching loss and improve the conversion efficiency of the converter.
With the wide application of motors, electric vehicles and electric products are more and more, a battery is arranged in the electric equipment, the battery is a single battery when the battery is small, and the battery pack is used for storing electric quantity of several degrees to dozens of degrees when the battery pack is large. The most common function of the charger is to convert 220V or 380V ac into dc required by the battery pack, and then charge the battery pack through the battery management system. However, as the electric quantity of the battery pack is larger and larger, when the electric quantity reaches dozens of degrees of electricity, another new application requirement is generated, namely, the electric quantity in the battery pack is reversely output, and the direct current of the battery pack is reversely converted into the 220V or 380V alternating current which is used by people at ordinary times. The conventional resonant equipment can realize bidirectional energy transfer, but is limited by a topological structure, only a forward working mode can realize a boosting function, and a reverse working mode cannot realize the boosting function.
The resonant device of the embodiment of the application can realize the bidirectional boosting function in the forward working mode and the reverse working mode by adjusting the frequency of the input voltage, so that the utilization rate of the circuit is improved.
It should be understood that the resonance device in the embodiment of the present application may be a vehicle-mounted battery charger, and may also be other devices such as a photovoltaic generator, which is not limited in the embodiment of the present application.
As an optional embodiment, the bidirectional resonant unit 110 further includes:
a second capacitor Cm1(105), a first terminal of the second capacitor is connected with a second terminal of the second inductor, and a second terminal of the second inductor is connected with the second terminal (b) of the bidirectional resonant unit through the second capacitor.
As an optional embodiment, the bidirectional resonance unit further includes:
a third capacitor Cm2(106), a first terminal of the third capacitor being connected to a second terminal of the third inductor, the second terminal of the third inductor being connected to the fourth terminal (d) of the bidirectional resonant cell via the third capacitor.
Specifically, the bidirectional resonant unit 110 may further include a second capacitor Cm1(105) and/or a third capacitor Cm2(106) to improve the boosting capability of the circuit, thereby improving efficiency. Fig. 2 shows a schematic circuit diagram of another resonant device 200 provided by the embodiment of the present application, in the resonant device 200, the bidirectional resonant unit further includes a second capacitor Cm1 and a third capacitor Cm2, wherein Cm1 is connected in series with Lm1, and Cm2 is connected in series with Lm 2.
Thus, in the forward mode of operation, Cr, Lr, Cm2 and Lm2 are involved in resonance, Lml and Cml are not involved in resonance and only serve to provide excitation current; in the reverse mode of operation, Cr, Lr, Cm1 and Lm1 are in resonance and Lm2 and Cm2 are not in resonance and serve only to provide excitation current.
The resonance equipment of the embodiment of the application can improve the boosting capacity of the circuit on the basis of realizing the bidirectional boosting function in the forward working mode and the reverse working mode, thereby improving the efficiency of the circuit and the flexibility of design.
As an alternative embodiment, at least one of the first inductance Lr, the second inductance Lm1, and the third inductance Lm2 is a separate magnetic inductance or a magnetically integrated inductance.
Figure 3 shows a schematic diagram of an equivalent circuit of the resonant device in the forward operation mode provided by the embodiment of the present application,ro is the load. In the forward mode of operation, current will flow through the series circuit of Cr, Lr, Cm2 and Lm2, with the series resonant frequency of Cr and Lr being F1, and the series resonant frequency of Cr, Lr, Cm2 and Lm2 being F2', wherein,
fig. 4 shows a normalized gain curve of the resonant device in the forward operation mode according to the embodiment of the present application.
When Fs is larger than or equal to F1, the circuit is in a voltage reduction mode, the gain G is smaller than 1, the output voltage Vdc2 is lower than the input voltage Vdc1, and the bidirectional resonance unit works in the first area; when Fs is less than or equal to F2' and less than or equal to F1, the circuit is in a boosting mode, the gain G is greater than 1, the output voltage Vdc2 is higher than the input voltage Vdc1, and at the moment, the bidirectional resonant unit works in a second area; when Fs is less than or equal to F2', the switching tube cannot realize ZVS, the switching tube works in a ZCS region, and in the ZCS region, the exciting current of the switching tube is reduced to zero before the switching tube is turned off, so that the exciting current cannot be provided for another switching tube to realize ZVS, and when the other switching tube is turned on, hard switching occurs, the impact current is large, and devices can be damaged. Therefore, the frequency Fs of the input voltage is prohibited from being smaller than F2'.
Fig. 5 shows a schematic diagram of an equivalent circuit of the resonant device in the reverse operation mode according to the embodiment of the present application, where Ro is a load. In the reverse mode of operation, current will flow through the series circuit of Cr, Lr, Cm1 and Lml, with the series resonant frequency of Cr and Lr being F1 and the series resonant frequency of Cr, Lr, Cm and Lml being F3', wherein,
fig. 6 is a graph of normalized gain of the resonant device in the reverse operation mode according to the embodiment of the present application.
When F1 of Fs is detected, the circuit is in a step-down mode, the gain G is smaller than 1, the output voltage Vdc1 is lower than the input voltage Vdc2, and the bidirectional resonant unit works in a first region; when Fs is less than or equal to F3' and less than or equal to F1, the circuit is in a boosting mode, the gain G is greater than 1, the output voltage Vdc1 is higher than the input voltage Vdc2, and at the moment, the bidirectional resonant unit works in a second area; when Fs is less than or equal to F3 ', the switching tube can not realize ZVS, so the frequency Fs of the input voltage is forbidden to be less than F3'.
The resonance equipment of the embodiment of the application can improve the boosting capacity of the circuit on the basis of realizing the bidirectional boosting function in the forward working mode and the reverse working mode, thereby improving the efficiency of the circuit and the flexibility of design.
Optionally, the resonant device may further comprise an isolation transformer for obtaining a desired output voltage. It should be understood that the isolation transformer may be a single-winding transformer, or may be a multi-winding transformer, which is not limited in this embodiment of the present application. The position of the isolation transformer in the topology may be at an input position of the circuit, may be at an output position of the circuit, and may also be in the middle of the bidirectional resonant unit, which is not limited in the embodiments of the present application.
As an optional embodiment, the resonance apparatus further comprises:
a first end and a second end of the isolation transformer are respectively connected with the anode and the cathode of the positive input voltage source, a third end and a fourth end of the isolation transformer are respectively connected with the first end and the second end of the bidirectional resonance unit,
the isolation transformer is used for:
and converting the direct current voltage of the forward input voltage source into alternating current voltage and outputting the alternating current voltage to the bidirectional resonance unit.
As an optional embodiment, the isolation transformer is a multi-winding transformer, and the isolation transformer further includes: the fifth end and the sixth end of the isolation transformer are respectively connected with the first end and the second end of the second load;
the isolation transformer is further configured to:
and converting the direct-current voltage of the forward input voltage source into alternating-current voltage and outputting the alternating-current voltage to the second load.
As an optional embodiment, the isolation transformer is a multi-winding transformer, and the isolation transformer further includes: the third end of the isolation transformer is connected with the voltage output end of the resonance equipment;
the isolation transformer is further configured to:
and converting the direct-current voltage input by the voltage input end of the resonance equipment into alternating-current voltage, and outputting the alternating-current voltage at the third end of the isolation transformer.
It should be understood that the voltage at the third terminal of the multi-winding transformer is not affected by the change of the frequency, only by the transformation ratio and the magnitude of the input voltage of the multi-winding transformer, because the voltage is obtained only by the multi-winding transformer and not by the bidirectional resonant unit. Therefore, no matter how the voltage frequency changes in the forward direction and the reverse direction, a fixed auxiliary source voltage can be obtained as long as the voltage of the input multi-winding transformer is ensured to be consistent, and the method is very suitable for application occasions with the requirements. Therefore, after the auxiliary winding is added to the isolation transformer, the resonant device provided by the embodiment of the application can save the design of the auxiliary power supply, and the cost is saved.
Fig. 7 shows a circuit schematic diagram of another resonance device 700 provided by the embodiment of the present application. As shown in fig. 7, the first terminal (e) and the second terminal (f) of the isolation transformer are respectively connected to the third terminal (c) and the fourth terminal (d) of the bidirectional resonant unit, and the isolation transformer is configured to convert the dc voltage output by the bidirectional resonant unit into an ac voltage and output the ac voltage at the third terminal (g) and the fourth terminal (h) of the isolation transformer, or convert the dc voltage input at the third terminal (g) and the fourth terminal (h) of the isolation transformer into an ac voltage and output the ac voltage at the first terminal (e) and the second terminal (f) of the isolation transformer, that is, transmit the ac voltage to the bidirectional resonant unit.
Specifically, in the forward working mode, the voltage firstly passes through the bidirectional resonance unit and then passes through the isolation transformer, the bidirectional resonance unit can process the direct-current voltage input by Vdc1 and transmit the processed direct-current voltage to the isolation transformer, and the isolation transformer converts the direct-current voltage into alternating-current voltage and outputs the alternating-current voltage at Vdc 2; in the reverse operation mode, the voltage firstly passes through the isolation transformer and then passes through the bidirectional resonance unit, the isolation transformer can convert the direct-current voltage input by the Vdc2 into alternating-current voltage and output the alternating-current voltage to the bidirectional resonance unit, and the bidirectional resonance unit processes the alternating-current voltage and outputs the processed alternating-current voltage at the Vdc 1.
Fig. 8 shows a circuit schematic diagram of another resonance device 800 provided by an embodiment of the present application. The resonant device in fig. 8 can achieve isolated multiplexed output, in the forward operation mode, the voltage of Vdc cl to Vdc3 is obtained only through the isolation transformer and not through the bidirectional resonant cell, therefore, the voltage at Vdc3 is not affected by the change of the operation frequency, and is only related to the transformation ratio of the transformer and the magnitude of the input voltage.
Fig. 9 is a schematic diagram illustrating a bidirectional topology connection of a resonance device according to an embodiment of the present application. In fig. 9, a forward input half bridge and an output full bridge are used. Under the forward working mode, a direct current source is input, a switching tube Q1 and a switching tube Q2 are used, a switching tube Q1 and a switching tube Q2 adopt 50% duty ratio and are switched according to a certain frequency Fs, direct current pulse voltage with the frequency of Fs can be obtained, then the direct current pulse voltage is input into a bidirectional resonance unit, an isolation transformer is used, and the direct current pulse voltage is rectified through the switching tube Q3-Q6 to obtain another needed isolated direct current output voltage.
Fig. 10 is a schematic diagram illustrating another bidirectional topology connection of a resonant device provided by an embodiment of the present application. In fig. 10, an inverted input full bridge and an output half bridge method are used. Under a reverse working mode, a direct current source is input, and is switched on and off at a certain frequency Fs by a switching tube Q3-Q6, wherein Q5, Q6, Q3 and Q4 adopt a 50% duty ratio, so that direct current pulse voltage with the frequency of Fs can be obtained, and another needed isolated direct current output voltage can be obtained by an isolation transformer, a bidirectional resonance unit and Q1 and Q2 rectification.
As an optional embodiment, the resonance apparatus further comprises:
a first FM generating unit and a first rectifying unit, wherein a first terminal and a second terminal of the first FM generating unit are respectively connected with a positive electrode and a negative electrode of the forward input voltage source, a third terminal and a fourth terminal of the first FM generating unit are respectively connected with a first terminal and a second terminal of the isolation transformer, a third terminal and a fourth terminal of the bidirectional resonant unit are respectively connected with a first terminal and a second terminal of the first rectifying unit, a third terminal and a fourth terminal of the first rectifying unit are respectively connected with a first terminal and a second terminal of the first load,
the first FM generation unit is configured to:
converting the direct-current voltage of the forward input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the isolation transformer;
the first rectifying unit is used for:
and converting the alternating current voltage output by the bidirectional resonance unit into direct current voltage and outputting the direct current voltage to the first load.
It should be understood that the partial unit is generally composed of metal-oxide-semiconductor field-effect transistors (MOSFETs), including but not limited to half-bridge MOSFETs and full-bridge MOSFETs. The first FM generation unit is configured to generate a frequency-modulated (FM) dc pulse wave by switching an input dc voltage with a 50% duty ratio when the input dc voltage is input in the forward direction, and input the frequency-modulated (FM) dc pulse wave to the bidirectional resonance unit. The first rectifying unit is used for performing output rectification by using a MOSFET body diode when the output voltage is output in the forward direction, so that the alternating-current voltage output by the isolation transformer is changed into direct-current voltage.
As an optional embodiment, the resonance apparatus further comprises:
a second FM generation unit and a second rectification unit, wherein a third terminal and a fourth terminal of the second FM generation unit are respectively connected to the positive electrode and the negative electrode of the reverse input voltage source, a first terminal and a second terminal of the second FM generation unit are respectively connected to the third terminal and the fourth terminal of the bidirectional resonance unit, a first terminal and a second terminal of the isolation transformer are respectively connected to the third terminal and the fourth terminal of the second rectification unit, and a first terminal and a second terminal of the second rectification unit are respectively connected to a first terminal and a second terminal of a third load,
the second FM generation unit is configured to:
converting the direct-current voltage of the reverse input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the bidirectional resonance unit;
the isolation transformer is further configured to:
converting the direct-current pulse voltage output by the bidirectional resonance unit into alternating-current voltage and outputting the alternating-current voltage to the second rectifying unit;
the second rectifying unit is used for:
and converting the alternating current voltage output by the isolation transformer into direct current voltage and outputting the direct current voltage to the third load.
It should be understood that this portion of the cell is generally composed of MOSFETs, including but not limited to half-bridge MOSFETs and full-bridge MOSFETs. The second rectifying unit is used for performing output rectification by using a MOSFET body diode when the output is reversed, so that the alternating-current voltage output by the isolation transformer is changed into direct-current voltage, and the second FM generating unit is used for generating direct-current pulse wave of frequency modulation FM to be input into the bidirectional resonance unit through the input direct-current voltage in a switching mode with 50% duty ratio when the input is reversed.
It should also be understood that the first FM generation unit and the second FM rectification unit may be two independent units or may be integrated into one unit, and the second FM generation unit and the first FM rectification unit may be two independent units or may be integrated into one unit, which is not limited in this embodiment of the present application.
As an optional embodiment, the resonance apparatus further comprises:
an FM control unit connected to the first FM generation unit and the second FM generation unit,
the FM control unit is used for:
and determining the voltage input direction of the bidirectional resonance unit, and inputting the direct-current pulse voltage to the first FM generation unit or inputting the direct-current pulse voltage to the second FM generation unit according to the voltage input direction.
As an optional embodiment, the resonance apparatus further comprises: a voltage sampling and error amplifying unit connected with the FM controller and the first load or the third load,
the FM control unit is further configured to:
generating a reference voltage and transmitting the reference voltage to the voltage sampling and error amplifying unit;
the voltage sampling and error amplifying unit is used for:
acquiring direct-current voltage output by the first load or the third load, comparing the direct-current voltage with the reference voltage to obtain a first error amplification value, and transmitting the first error amplification value to the FM control unit;
the FM control unit is further configured to:
and adjusting the frequency of the direct current voltage output by the FM according to the first error amplification value.
Specifically, the FM control unit is typically a Digital Signal Processing (DSP) control chip or other analog control chip that is responsible for receiving the Pi signal from the voltage sampling and error amplifying unit. When the FM pulse wave is output in the forward direction, the FM control unit may send a forward FM control signal to the first FM generation unit to drive the MOSFET in the forward direction to generate an FM pulse wave; when outputting in reverse, the FM control unit may send a reverse FM control signal to the second FM generation unit to drive the reverse MOSFET to generate an FM pulse wave. Therefore, the FM control unit can cause the system to output the set voltage by adjusting the reference voltage of the error amplifier unit.
Fig. 11 shows a control block diagram of another resonance device 1100 provided by the embodiment of the present application, where the resonance device 1100 includes: the bidirectional resonant unit 110, the isolation transformer 120, the first FM generation unit 1102, the first rectification unit 1103, the second FM generation unit 1104, the second rectification unit 1105, the FM control unit 1106, the forward output voltage sampling and error amplification unit 1107, and the reverse output voltage sampling and error amplification unit 1108.
In fig. 11, first, the FM control unit 1106 determines whether to output in the forward direction or in the reverse direction, after the FM control unit 1106 determines that the FM control unit is in the forward operation mode, the FM control unit 1106 outputs a forward FM control signal to the first FM generation unit 1102, the first FM generation unit 1102 changes the input forward dc voltage into an FM pulse voltage and inputs the FM pulse voltage to the bidirectional resonance unit 110, the bidirectional resonance unit 110 outputs an ac voltage through the isolation transformer 120, and the ac voltage enters the first rectification unit 1103 and is output as a dc voltage. The output voltage can be sent into the forward output voltage sampling and error amplifying unit 1107 to be compared with the forward reference voltage generated by the FM control unit 1106, and then the forward output voltage sampling and error amplifying unit 1107 outputs a forward Pi value to be received by the FM control unit 1106, the FM control unit 1106 adjusts the frequency of the FM control signal according to the Pi value, so as to adjust the frequency of the FM pulse voltage input to the bidirectional resonance unit 110 by the first FM generation unit 1102, and the bidirectional resonance unit 110 presents different impedances according to different input FM pulse voltage frequencies, so as to adjust the output voltage, and the adjustment process continues until the forward sampled voltage signal is consistent with the set reference voltage and reaches balance.
It should be understood that the reverse mode of operation is similar to the forward mode of operation and will not be described in detail herein.
Fig. 12 shows a control block diagram of another resonance apparatus 1200 provided by the embodiment of the present application, where the resonance apparatus 1200 includes: the digital FM receiver includes a bidirectional resonance unit 110, a multi-winding transformer 130, a first FM generation unit 1102, a first rectification unit 1103, a second FM generation unit 1104, a second rectification unit 1105, and a third rectification unit 1110.
Specifically, one more winding may be added to the isolation transformer, that is, the isolation transformer is specifically the multi-winding transformer 130, and the multi-winding transformer 130 is placed in front of the bidirectional resonant unit 110. When the FM voltage pulse in the forward direction is input to the isolation transformer 130, a fixed voltage is obtained at the auxiliary source winding by fixing the transformation ratio n (n is less than 1), and when the FM voltage pulse is input in the reverse direction, the auxiliary source winding can also obtain a fixed voltage as long as the voltage output in the reverse direction substantially coincides with the magnitude of the input voltage in the forward direction. Moreover, since the voltage is obtained only by the multi-winding transformer 130 and does not pass through the bidirectional resonant unit 110, it is not affected by the change of the frequency, but only by the transformation ratio of the multi-winding transformer 130 and the magnitude of the input voltage. Therefore, no matter how the FM frequency changes in the forward direction and the reverse direction, a fixed auxiliary source voltage can be obtained as long as the voltage of the input multi-winding transformer 130 is consistent, and the FM frequency converter is very suitable for application occasions with the requirement.
Therefore, after the auxiliary winding is added to the isolation transformer, the resonant device provided by the embodiment of the application can save the design of the auxiliary power supply, and the cost is saved.
It should be understood that the resonant device of the embodiments of the present application can be applied in single-phase or multi-phase parallel, series or other connected circuit topologies, which is not limited by the embodiments of the present application. In one possible implementation, a parallel input-to-parallel and parallel output connection is adopted, as shown in fig. 13, so that two-phase output can be realized, and the output power is doubled.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A resonant device, comprising:
a bidirectional resonant unit, a first end of the bidirectional resonant unit being connected to a positive electrode of a forward input voltage source of the resonant device, a second end of the bidirectional resonant unit being connected to a negative electrode of the forward input voltage source, a third end of the bidirectional resonant unit being connected to a first end of a first load, a fourth end of the bidirectional resonant unit being connected to a second end of the first load,
or a first end of the bidirectional resonance unit is connected with a first end of the first load, a second end of the bidirectional resonance unit is connected with a second end of the first load, a third end of the bidirectional resonance unit is connected with a positive electrode of a reverse input voltage source of the resonance device, and a fourth end of the bidirectional resonance unit is connected with a negative electrode of the reverse input voltage source;
the bidirectional resonance unit includes: a series circuit comprising a first capacitor (101) and a first inductor (102) connected in series with the first capacitor, a first end of the series circuit being connected with a first end of the bidirectional resonant unit, a second end of the series circuit being connected with a third end of the bidirectional resonant unit;
the bidirectional resonance unit further includes:
a second inductor (103), a first end of the second inductor being connected to a first end of the bidirectional resonant unit, a second end of the second inductor being connected to a second end of the bidirectional resonant unit;
a third inductor (104), a first end of the third inductor being connected to a third end of the bidirectional resonant unit, a second end of the third inductor being connected to a fourth end of the bidirectional resonant unit;
the resonance apparatus further includes:
a first end and a second end of the isolation transformer are respectively connected with the anode and the cathode of the positive input voltage source, a third end and a fourth end of the isolation transformer are respectively connected with the first end and the second end of the bidirectional resonance unit,
the isolation transformer is used for:
converting the direct-current voltage of the forward input voltage source into alternating-current voltage and outputting the alternating-current voltage to the bidirectional resonance unit;
the resonance apparatus further includes:
the first FM generating unit and the second FM generating unit are respectively connected with the positive pole and the negative pole of the positive input voltage source, the third FM generating unit and the fourth FM generating unit are respectively connected with the first FM generating unit and the second FM generating unit, the,
the first FM generation unit is configured to:
converting the direct-current voltage of the forward input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the isolation transformer;
the first rectifying unit is used for:
converting the alternating-current voltage output by the bidirectional resonance unit into direct-current voltage and outputting the direct-current voltage to the first load;
the voltage frequency between the positive pole and the negative pole of the forward input voltage source is Fs, the series resonance frequency of the first capacitor and the first inductor is F1, the series resonance frequency of the first capacitor, the first inductor and the third inductor is F2, and F1 is less than or equal to F2 and less than or equal to Fs; alternatively, the first and second electrodes may be,
the voltage frequency between the positive pole and the negative pole of the reverse input voltage source is Fs, the series resonance frequency of the first capacitor and the first inductor is F1, the series resonance frequency of the first capacitor, the first inductor and the second inductor is F3, and F1 is less than or equal to F3 and less than or equal to Fs.
2. The resonating device of claim 1, wherein the bidirectional resonating unit further comprises:
and a second capacitor (105), wherein a first end of the second capacitor is connected with a second end of the second inductor, and a second end of the second inductor is connected with a second end of the bidirectional resonance unit through the second capacitor.
3. The resonating device of claim 1, wherein the bidirectional resonating unit further comprises:
and a third capacitor (106), wherein a first end of the third capacitor is connected with a second end of the third inductor, and a second end of the third inductor is connected with a fourth end of the bidirectional resonance unit through the third capacitor.
4. The resonating apparatus of claim 1, wherein the isolation transformer is a multi-winding transformer, the isolation transformer further comprising: the fifth end and the sixth end of the isolation transformer are respectively connected with the first end and the second end of the second load;
the isolation transformer is further configured to:
and converting the direct-current voltage of the forward input voltage source into alternating-current voltage and outputting the alternating-current voltage to the second load.
5. The resonating device of claim 1, further comprising:
a second FM generation unit and a second rectification unit, wherein a third terminal and a fourth terminal of the second FM generation unit are respectively connected to the positive electrode and the negative electrode of the reverse input voltage source, a first terminal and a second terminal of the second FM generation unit are respectively connected to the third terminal and the fourth terminal of the bidirectional resonance unit, a first terminal and a second terminal of the isolation transformer are respectively connected to the third terminal and the fourth terminal of the second rectification unit, and a first terminal and a second terminal of the second rectification unit are respectively connected to a first terminal and a second terminal of a third load,
the second FM generation unit is configured to:
converting the direct-current voltage of the reverse input voltage source into direct-current pulse voltage and outputting the direct-current pulse voltage to the bidirectional resonance unit;
the isolation transformer is further configured to:
converting the direct-current pulse voltage output by the bidirectional resonance unit into alternating-current voltage and outputting the alternating-current voltage to the second rectifying unit;
the second rectifying unit is used for:
and converting the alternating current voltage output by the isolation transformer into direct current voltage and outputting the direct current voltage to the third load.
6. The resonating device of claim 5, further comprising:
an FM control unit connected to the first FM generation unit and the second FM generation unit,
the FM control unit is used for:
and determining the voltage input direction of the bidirectional resonance unit, and inputting the direct-current pulse voltage to the first FM generation unit or inputting the direct-current pulse voltage to the second FM generation unit according to the voltage input direction.
7. The resonating device of any one of claims 1 to 6, wherein at least one of the first inductance, the second inductance, and the third inductance is a separate magnetic inductance or a magnetically integrated inductance.
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| CN103138580A (en) * | 2011-12-01 | 2013-06-05 | 台达电子企业管理（上海）有限公司 | Direct-current (DC) - DC converter, power converter and control method thereof |
| CN105024551A (en) * | 2014-04-16 | 2015-11-04 | 艾默生网络能源有限公司 | Resonance circuit, charger and uninterrupted power supply |
| CN106787768A (en) * | 2017-02-17 | 2017-05-31 | 珠海英搏尔电气股份有限公司 | A kind of two-way full-bridge resonance DC/DC converter and its control method |
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