CN110994811A - Wireless charging system, control method and automobile wireless charging device - Google Patents
Wireless charging system, control method and automobile wireless charging device Download PDFInfo
- Publication number
- CN110994811A CN110994811A CN201911344024.8A CN201911344024A CN110994811A CN 110994811 A CN110994811 A CN 110994811A CN 201911344024 A CN201911344024 A CN 201911344024A CN 110994811 A CN110994811 A CN 110994811A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resonance
- network
- vehicle
- wireless charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- 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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a wireless charging system, a control method and an automobile wireless charging device, wherein the system comprises: the PFC circuit, the inverter circuit, the primary side resonant network and the infrastructure sampling control circuit are positioned at the infrastructure side; the secondary side resonance network, the controllable rectification adjusting circuit and the vehicle-mounted detection control circuit are positioned on the vehicle-mounted side; adjusting the working parameters of the vehicle-mounted side controllable rectification adjusting circuit according to the detected resonance parameters of the primary and secondary side resonance networks or the related quantity capable of reflecting the resonance state of the system so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control command; the capital construction sampling control circuit is in communication connection with the vehicle-mounted detection control circuit, and controls and adjusts output current and/or output voltage of the PFC circuit and the inverter circuit or a phase-shifting angle of the inverter circuit according to a detection signal or instruction output by the vehicle-mounted detection control circuit, so that output meets requirements.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging system, a control method and an automobile wireless charging device.
Background
Along with the development of new forms of energy, more and more cars begin to adopt electronic, or oil-electricity mixes, and when charging for electric automobile, can utilize the principle of electromagnetic induction, the wireless mode of charging of sampling charges.
In practical application, the ground clearance of the chassis can change along with factors such as load, tire pressure and the like, so that the resonance mismatch between the vehicle and infrastructure is caused. And, different vehicles or same vehicle different time, required charging voltage/electric current is different, and wireless charging system needs to satisfy the different charging voltage/electric current demands of vehicle according to vehicle BMS instruction.
Disclosure of Invention
The invention mainly aims to provide a wireless charging system, a control method and an automobile wireless charging device, aiming at realizing the resonant matching of a resonant network of the wireless charging system and the adjustability of charging voltage/current.
In order to achieve the above object, the present invention provides a wireless charging system, including:
the PFC circuit, the inverter circuit, the primary side resonant network and the infrastructure sampling control circuit are positioned at the infrastructure side;
the secondary side resonance network, the controllable rectification adjusting circuit and the vehicle-mounted detection control circuit are positioned on the vehicle-mounted side; the infrastructure sampling control circuit controls the PFC circuit to correct and rectify power factors of accessed alternating current, controls the inverter circuit to invert the alternating current into alternating current, and transmits the alternating current to the controllable rectification regulating circuit through the primary side resonant network and the secondary side resonant network; the infrastructure sampling control circuit is in communication connection with the vehicle-mounted detection control circuit,
the infrastructure sampling control circuit and/or the vehicle-mounted detection control circuit adjust working parameters of the controllable rectification adjusting circuit according to resonance parameters of the system resonance network detected by the vehicle-mounted detection control circuit and the infrastructure sampling control circuit so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control command;
and controlling and adjusting the output current and/or the output voltage of the PFC circuit and the inverter circuit according to a detection signal and/or a control instruction output by the vehicle-mounted detection control circuit, so that the charging voltage/current is adjustable.
Optionally, the infrastructure sampling control circuit further controls and adjusts a phase shift angle of the inverter circuit according to a detection signal and/or a control instruction output by the vehicle-mounted detection control circuit, so as to adjust an output current and/or an output voltage of the inverter circuit.
Optionally, the wireless charging system further includes a DC-DC circuit on the infrastructure side, and the DC-DC circuit is arranged in series between the PFC circuit and the inverter circuit.
Optionally, the controllable rectification adjusting circuit includes a first upper bridge arm switch, a second upper bridge arm switch, a first lower bridge arm switch, and a second lower bridge arm switch, where the first upper bridge arm switch and the first lower bridge arm switch are connected in series to form a first bridge arm circuit, and the second upper bridge arm switch and the second lower bridge arm switch are connected in series to form a second bridge arm circuit.
Optionally, the wireless charging system further includes a wireless communication circuit separately disposed on the infrastructure side and the vehicle-mounted side, and the infrastructure sampling control circuit and the vehicle-mounted detection control circuit are in communication connection through the wireless communication circuit.
The invention also provides a wireless charging control method, which is suitable for the wireless charging system, and the wireless charging system comprises a PFC circuit, an inverter circuit, a primary side resonance network and a infrastructure sampling control circuit which are positioned on a infrastructure side, and a secondary side resonance network, a controllable rectification regulating circuit and a vehicle-mounted detection control circuit which are positioned on a vehicle-mounted side; the wireless charging control method comprises the following steps:
detecting original secondary side resonance parameters, and controlling the controllable rectification regulating circuit to work according to the detected resonance parameters of the original secondary side resonance network so as to enable the original side resonance network and the secondary side resonance network to be in resonance matching;
detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control command;
and adjusting the output current and/or the output voltage of the PFC circuit and the inverter circuit according to the detection signal and/or the control instruction output by the vehicle-mounted detection control circuit.
Optionally, the detecting a resonance parameter of the system resonance network, and controlling the controllable rectification adjusting circuit to operate according to the detected resonance parameter of the system resonance network, so that the resonant matching of the primary side resonance network and the secondary side resonance network specifically includes:
and looking up a table or calculating working parameters of the controllable rectification regulating circuit according to the detected resonance parameters of the system resonance network so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching.
Optionally, the detecting a resonance parameter of the system resonance network, and controlling the controllable rectification adjusting circuit to operate according to the detected resonance parameter of the primary and secondary resonance networks, so that the resonant matching of the primary resonance network and the secondary resonance network specifically includes:
and continuously adjusting the working parameters of the controllable rectification regulating circuit until the primary side resonance network and the secondary side resonance network are in resonance matching.
Optionally, the operating parameter includes a duty cycle or a phase shift angle of the controllable rectification and regulation circuit, and a phase relationship between the voltage Ve and the current Ie.
The invention also provides an automobile wireless charging device, which comprises the wireless charging system; the wireless charging system includes:
the PFC circuit, the inverter circuit, the primary side resonant network and the infrastructure sampling control circuit are positioned at the infrastructure side;
the secondary side resonance network, the controllable rectification adjusting circuit and the vehicle-mounted detection control circuit are positioned on the vehicle-mounted side; the infrastructure sampling control circuit controls the PFC circuit to correct and rectify power factors of accessed alternating current, controls the inverter circuit to invert the alternating current into alternating current, and transmits the alternating current to the controllable rectification regulating circuit through the primary side resonant network and the secondary side resonant network; the infrastructure sampling control circuit is in communication connection with the vehicle-mounted detection control circuit,
the infrastructure sampling control circuit and/or the vehicle-mounted detection control circuit adjust working parameters of the controllable rectification adjusting circuit according to resonance parameters of the system resonance network detected by the vehicle-mounted detection control circuit and the infrastructure sampling control circuit so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control command;
and controlling and adjusting the output current and/or the output voltage of the PFC circuit and the inverter circuit according to a detection signal and/or a control instruction output by the vehicle-mounted detection control circuit, so that the charging voltage/current is adjustable.
The wireless charging system controls a PFC circuit to correct and rectify power factors of accessed alternating current through a infrastructure sampling control circuit positioned on a infrastructure side, controls an inverter circuit to invert the alternating current into alternating current, and transmits the alternating current to a controllable rectification adjusting circuit on a vehicle side through a primary side resonance network and a secondary side resonance network, and adjusts working parameters of the controllable rectification adjusting circuit through the infrastructure sampling control circuit and/or the vehicle detection control circuit according to detected resonance parameters of an original secondary side resonance network so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; and detecting the voltage and/or current output by the controllable rectification regulating circuit, generating a corresponding detection signal and/or control instruction, so that the infrastructure sampling control circuit is in communication connection with the vehicle-mounted detection control circuit, and controlling and regulating the output current and/or output voltage of the PFC circuit and the inverter circuit according to the detection signal and/or control instruction output by the vehicle-mounted detection control circuit. The invention can meet the requirements of the electric automobile on charging voltage/current/power, realize the adjustability of the charging voltage/current, realize the resonant matching of the resonant network of the wireless charging system and solve the problem that the working characteristics of the system are influenced when the resonant network is in a non-resonant matching state.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of a wireless charging system according to an embodiment of the present invention;
fig. 2 is a schematic circuit block diagram of an embodiment of a wireless charging system according to the present invention;
fig. 3 is a schematic circuit block diagram of another embodiment of a wireless charging system according to the present invention;
FIG. 4 is a schematic diagram of the operation of the controllable rectification regulation circuit of FIG. 3;
FIG. 5 is a waveform diagram illustrating duty cycle regulation of the controllably rectifying regulator circuit of FIG. 3;
FIG. 6 is a graph of the real part coefficient of the equivalent load in the controllable rectification and regulation circuit of FIG. 3;
FIG. 7 is a graph of imaginary coefficients of an equivalent load in the controllable rectification and regulation circuit of FIG. 3;
FIG. 8 is a diagram illustrating the phase shift adjustment effect of the inverter circuit shown in FIG. 3;
FIG. 9 is an equivalent circuit diagram of a controllably rectifying regulator circuit;
fig. 10 is a flowchart illustrating a wireless charging control method according to an embodiment of the invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a wireless charging system.
The infrastructure side part of the wireless charging system is arranged under the ground, the vehicle-mounted side part is arranged on the automobile, and when the wireless charging system is charged, a driver drives the automobile to a specified position and starts the wireless charging system to charge. The electric automobile wireless charging mainly utilizes the principle of electromagnetic induction coupling, when a primary side resonance network and a secondary side resonance network are adjusted to be at a uniform resonance frequency, the two resonance networks generate resonance, energy is transmitted to a vehicle-mounted side from a infrastructure side, and power grid energy of the infrastructure side is transmitted to a vehicle-mounted side battery in a non-contact mode, so that wireless charging is realized. However, in practical application, the ground clearance of the chassis varies with the factors such as load, tire pressure and the like, and at the same time, the relative physical positions of the primary and secondary coils of the loosely coupled transformer may be different each time when the vehicle is parked (there is a certain deviation in the front-back and left-right directions), that is, the parameters of the loosely coupled transformer may be different each time when the vehicle is parked, so that the resonant matching state of the resonant network is affected. In addition, in practical applications, different vehicles or the same vehicle need different charging voltages/currents at different times, and the wireless charging system needs to meet different charging voltage/current requirements of the vehicles according to the vehicle BMS command.
In order to solve the above problem, referring to fig. 1 to 3, in an embodiment of the present invention, the wireless charging system includes:
the PFC circuit 110, the inverter circuit 120, the primary side resonant network 130 and the infrastructure sampling control circuit 140 are positioned at the infrastructure side;
referring to fig. 1, based on the above embodiment, the wireless charging system further includes a DC-DC circuit 150 located at a infrastructure side, and the DC-DC circuit 150 is serially disposed between the PFC circuit 110 and the inverter circuit 120.
The auxiliary side resonant network 210, the controllable rectification adjusting circuit 220 and the vehicle-mounted detection control circuit 230 are positioned on the vehicle-mounted side; the infrastructure sampling control circuit 140 controls the PFC circuit 110 to perform power factor correction and rectification on the accessed alternating current, converts the direct current through the DC-DC circuit 150 and controls the inverter circuit 120 to invert the direct current into the alternating current, and then transmits the alternating current to the controllable rectification and adjustment circuit 220 through the primary side resonant network 130 and the secondary side resonant network 210;
the vehicle-mounted detection control circuit 230 and/or the infrastructure sampling control circuit 140 adjust the working parameters of the controllable rectification adjusting circuit 220 according to the obtained resonance parameters of the primary and secondary resonant networks, so that the primary resonant network 130 and the secondary resonant network 210 are in resonant matching; detecting the voltage and/or current output by the controllable rectification regulating circuit 220 and generating a corresponding detection signal and/or a corresponding control command;
the infrastructure sampling control circuit 140 is in communication connection with the vehicle-mounted detection control circuit 230, and controls and adjusts the output current and/or the output voltage of the PFC circuit 110, the inverter circuit 120, and the DC-DC circuit 150 according to the detection signal and/or the control instruction output by the vehicle-mounted detection control circuit 230.
In this embodiment, the input of the PFC circuit 110 is a national standard power grid single-phase or three-phase power; the PFC circuit 110 may be implemented by a PFC switch, a diode, an inductor, and the like. The PFC circuit 110 may be implemented by an active PFC circuit 110 or a passive PFC circuit 110, and the PFC circuit 110 may be a boost PFC circuit 110, a buck PFC circuit 110, or a boost PFC circuit 110. The PFC circuit 110 performs power factor correction and rectification on the accessed alternating current, and the rectified direct current is output to the DC-DC circuit 150 and then accessed to the input terminal of the inverter circuit 120. The input voltage and the input current of the inverter circuit 120 are defined herein as Vdc and Idc, where Vdc/Idc has a certain regulation range, which can be specifically regulated according to the output current and the output voltage of the vehicle.
The inverter circuit 120 integrates four power switching tubes (S1-S4) which form a two-phase inverter bridge circuit. Each power switch tube can be realized by adopting an MOS tube or an IGBT. The inverter circuit 120 is used to realize DC/AC conversion, that is, convert DC power into high-frequency AC power, and has an operating frequency f, a midpoint voltage/current of the full bridge is Vin/Iin, and an equivalent impedance is Zin.
It can be understood that, since the wireless charging system adopts the electromagnetic induction principle for energy transmission, it inevitably emits an electromagnetic field with a certain power to the outside. When a wireless charging system operates with variable frequency in a certain frequency range, the fundamental frequency or high frequency radiation of the electromagnetic field in these frequency ranges may interfere with sensitive common signals at certain specific frequencies. In order to avoid the situation, the wireless charging system can work at a specific frequency, so that the fundamental frequency or high-frequency radiation of the frequency can avoid the sensitive signal frequency band, namely the wireless charging system is suitable for fixed-frequency wireless charging.
The primary resonant network 130 includes a primary coil Lp and a primary compensation network 131, and the secondary resonant network 210 includes a secondary coil Ls and a secondary compensation network 211, wherein the primary coil Lp and the secondary coil Ls form a loosely coupled transformer to implement energy transmission and reception, and the shape types of the primary coil Lp and the secondary coil Ls are not limited, and may be a circular coil, a rectangular coil, a D-shaped coil, and the like. The air gap between the two coils is large, the characteristics of large leakage inductance and small excitation inductance are achieved, and the power factor of the whole system is low. Therefore, the primary side resonant network 130 and the secondary side resonant network 210 are further respectively provided with a primary side compensation network 131 and a secondary side compensation network 211, which may be composed of compensation capacitors and compensation inductors, and may be implemented in a single-device compensation manner such as a series compensation capacitor or a parallel compensation capacitor, or in a multi-device combination compensation manner such as an LCL or an LCC. The loose coupling transformer and the two compensation networks form a resonant network of the wireless charging system, and when the resonant network is in a resonant matching state, the functions (such as output function size, output voltage/current range and the like) and performances (such as efficiency index and the like) of the whole wireless charging system have better working characteristics; otherwise, the opposite is true.
Referring to fig. 5, 6, and 7, the controllable rectification adjustment circuit 220 is a switch-type full-bridge rectification circuit for converting a high-frequency ac current into a dc current, and implementing resonant network tuning and output characteristic adjustment. The midpoint voltage/current of the full bridge is Ve/Ie respectively, and the equivalent impedance is Re. The vehicle-mounted side is also provided with a vehicle-mounted battery, an output filter capacitor Co, an impedance matching resistor, an electric load Rout and other output networks 240.
The waveform of Ve, Ie of the conventional uncontrolled rectification is shown in fig. 5(a), where Re is estimated approximately as follows:
when the controllable rectification regulating circuit 220 of this patent works Ve, Ie waveforms are as shown in fig. 5(b), the duty ratio D is as marked in the figure, and then the effective impedance at this time is Re, which can be expressed as:
as can be seen from the above equation, the equivalent impedance Re is not purely resistive, and is decomposed into a real part and an imaginary part as follows:
wherein the content of the first and second substances,
for the equivalent load during uncontrolled rectification or synchronous rectification, D is the duty cycle of the controllable rectification regulating circuit 220, i.e. Re is compared with the uncontrolled rectification/synchronous rectification, and its pure resistive load is equivalent to introducing a coefficient kre (as shown in fig. 6), and at the same time, an imaginary part with a coefficient kim (as shown in fig. 7) is added. The real part and the imaginary part of the equivalent impedance can be adjusted by adjusting different duty ratios D, and the real part and the imaginary part are connected with a resonant network of a system, which is equivalent to that a controllable resonant parameter adjusting quantity is connected in series in the original resonant network, and the variable resonant parameter adjusting quantity has the function of adjusting the output voltage/current characteristic.
As shown in fig. 5(b), in this operating mode, the phase of the current Ie leads the zero-crossing point of the fundamental wave of the voltage Ve, and the current Ie and the voltage Ve are in a capacitive operating state, where θ is equal to D/2. Of course, in addition to the capacitive operation mode shown in fig. 5(b), the controllable full bridge may also adjust the phases of the driving and the zero crossing point Ie, that is, adjust the phases of the voltage Ve and the current Ie, so that the controllable full bridge operates in an inductive or resistive state. In fig. 5(c), the fundamental wave zero crossing point of the voltage Ve leads the current Ie zero crossing point, that is, the controllable rectifier module operates in an inductive mode, and the phase of the voltage Ve and the current Ie is θ ═ D/2; in fig. 5(d), the fundamental wave zero crossing point of the voltage Ve and the zero crossing point of the current Ie coincide, that is, the controllable rectifier module operates in the resistive mode, and at this time, the phase of the voltage Ve and the phase of the current Ie are θ equal to 0;
therefore, as described above, the controllable rectifier module can operate in a capacitive, resistive or inductive operation mode by adjusting the phases of the point voltage Ve and the current Ie in the controllable rectifier adjusting circuit 220; and through adjusting duty ratio D, can adjust appearance value, resistance or sense value size, not only can realize the regulation of output characteristic, can also realize the regulation of different resonance parameters simultaneously to finally realize the regulation of resonant network.
The controllable rectification adjusting circuit 220 can also adjust the resonant network by controlling the phase shift angle α, the specific adjusting mode is the same as the mode of adjusting the duty ratio, the working principle is the same, and the realized technical effect is the same, therefore, the imaginary part and the real part of the equivalent impedance can be adjusted by adjusting the different phase shift angle α, the imaginary part is connected with the resonant network of the system, which is equivalent to connecting a controllable resonant parameter adjusting quantity in series in the original resonant network, the real part is adjusted equivalent to adjusting the output voltage/current characteristic, when the original resonant network is in the non-resonant matching state, the real part and the imaginary part of the equivalent load Re can be adjusted by adjusting the phase shift angle α or the duty ratio of the controllable rectification adjusting circuit 220 and the working parameters of the phase relation of the voltage Ve and the current Ie, so that the system is in the resonant matching state again, thereby achieving the better working characteristic of the system.
The infrastructure side sampling control circuit and the on-board detection control circuit 230 each include a sampling circuit and a control circuit, wherein the sampling circuit can adopt independent devices such as a current transformer, a Hall sensor and the like, or a detection circuit consisting of elements such as a resistor, a capacitor and the like to detect current/voltage, the control circuit can adopt microprocessors such as a DSP, a singlechip, an FPGA and the like to realize, so as to sample the corresponding signals of current, voltage and the like and sample the PFC circuit 110, the DC-DC circuit 150 and the inverter circuit 120 on the capital construction side, the vehicle-mounted controllable rectification regulating circuit 220 performs related logic control, for example, the full-bridge midpoint current Iin/voltage Vin of the inverter circuit 120 and the sampling amount of the voltage and current phase thereof, the sampling amount of the input voltage Vdc and current Idc of the inverter circuit 120, and the sampling amount of the current Ip of the primary coil Lp can be detected; the sampling amount of the system output voltage Vout/current Iout, the sampling amount of the midpoint current Ie/voltage Ve in the full bridge of the controllable rectification regulating circuit 220, the sampling amount of the voltage current phase thereof, the secondary coil Ls current Is or the sampling amount of the phase angle of the secondary impedance Zs.
The control circuits on the infrastructure side and the vehicle side can also realize communication connection through the primary coil Lp and the secondary coil Ls so as to transmit detection signals and respective working states and realize signal interaction. The vehicle-mounted side detection circuit may obtain the resonance parameter by detecting the midpoint voltage/current of the controllable rectification adjusting circuit 220, looking up a table or calculating, and may also directly detect the parameter (such as the mutual inductance M, or the coupling coefficient K, etc.) of the current loosely-coupled transformer. Of course, the resonance parameters may also be obtained through parameters such as the phase angle quantity of the primary Vin/Iin, the sampling quantity of the phase angle of the secondary impedance Zs, the magnitude of the secondary transformer current Is (during resonance matching, the reactive power Is minimum, and the current Is minimum), and the system efficiency (during resonance matching, the system efficiency Is highest).
When the wireless charging system is charging, the vehicle detection control circuit 230 sends information such as charging voltage, current, power and the like of the vehicle side to the infrastructure sampling control circuit 140 in a wireless communication manner, and the infrastructure sampling control circuit 140 can realize control of the charging current through the output voltage Vin or the primary coil current Ip of the infrastructure side according to the current power grid voltage and the required charging current.
Or when the wireless charging system is charging, the vehicle-mounted detection control circuit 230 calculates or looks up the table according to the charging voltage, current, power and other information of the vehicle-mounted side to generate a primary parameter control reference (or continuously adjusts the primary parameter control reference), sends the primary parameter control reference to the infrastructure sampling control circuit 140 in a wireless communication mode, and the infrastructure sampling control circuit 140 controls and adjusts and responds to the primary parameter according to the parameter control reference, and controls the charging current.
The wireless charging system controls the PFC circuit 110 to correct and rectify the power factor of the accessed alternating current through the infrastructure sampling control circuit 140 positioned on the infrastructure side, converts the direct current through the DC-DC circuit 150, controls the inverter circuit 120 to invert the direct current into the alternating current, and transmits the alternating current to the controllable rectification regulating circuit 220 on the vehicle side through the primary side resonance network 130 and the secondary side resonance network 210. The infrastructure sampling control circuit 140 and/or the vehicle-mounted detection control circuit 230 adjust the working parameters of the controllable rectification adjusting circuit 220 according to the resonance parameters of the system resonance network detected by the vehicle-mounted detection control circuit 230 and the infrastructure sampling control circuit 140, so that the primary side resonance network 130 and the secondary side resonance network 210 are in resonance matching; the infrastructure sampling control circuit 140 further detects the voltage and/or current output by the controllable rectification regulating circuit 220, and generates a corresponding detection signal and/or control instruction, so that the infrastructure sampling control circuit 140 is in communication connection with the vehicle-mounted detection control circuit 230, and controls and regulates the output current and/or output voltage of the PFC circuit 110, the DC-DC circuit 150, and the inverter circuit 120 according to the detection signal and/or control instruction output by the vehicle-mounted detection control circuit 230, thereby realizing the adjustability of charging voltage/current. The invention can meet the requirements of the electric automobile on charging voltage/current/power, realize the adjustability of the charging voltage/current, realize the resonant matching of the resonant network of the wireless charging system and solve the problem that the working characteristics of the system are influenced when the resonant network is in a non-resonant matching state.
Referring to fig. 1, fig. 2, and fig. 8, in an embodiment, the infrastructure sampling control circuit 140 may further control and adjust a phase shift angle and/or a control command of the inverter circuit 120 according to a control demand, so as to adjust an output current and/or an output voltage of the inverter circuit 120.
When the inverter circuit 120 operates in the non-phase-shifting non-modulated duty cycle mode, the input voltage of the inverter circuit 120 can be represented as:
when the full bridge operates in the phase shift mode, the phase shift angle is defined as α, and the input voltage of the inverter circuit 120 is:
that is, by controlling the phase shift angle α, it is equivalent to introducing an adjustment coefficient based on the original input voltage, and by changing the adjustment coefficient values at different phase shift angles, the input voltage can be adjusted, and under the same power condition, the adjustment of the input voltage Vin can be equivalent to the adjustment of the input current Iin, that is, the output current and/or the output voltage of the inverter circuit 120 can be adjusted, and the adjustment of the output voltage/the output current of the controllable rectifier bridge circuit can be realized.
It should be noted that, when the inverter circuit 120 adopts a phase-shift control mode and each power switch in the inverter circuit 120 adopts a MOS transistor, the inverter full bridge needs to operate under soft switching.
The adjustment of the output voltage/output current of the infrastructure side may be achieved by adjusting the output voltage/output current of the PFC circuit 110 and the DC-DC circuit, or by performing phase shift control on the inverter circuit 120, or by performing adjustment by using the three, which is not limited herein.
Referring to fig. 4, in one embodiment, the controllable rectification and regulation circuit 220 includes a first upper leg switch Q1, a second upper leg switch Q2, a first lower leg switch Q3, and a second lower leg switch Q4, the first upper leg switch Q1 is connected in series with the first lower leg switch Q3 to form a first leg circuit, and the second upper leg switch Q2 is connected in series with the second lower leg switch Q4 to form a second leg circuit.
In this embodiment, the first upper arm switch Q1, the second upper arm switch Q2, the first lower arm switch Q3, and the second lower arm switch Q4 constitute two arm circuits, and the two arm circuits have 2 operation modes in total: the synchronous/uncontrolled rectifying mode and the short-circuit mode are shown in fig. 4(a) and 4(b), respectively, taking the positive half cycle of the current Ie as an example. As shown in fig. 4(a), when the first upper arm switch Q1 and the second lower arm switch Q4 are turned on, the Ie current supplies power to the load through the rectifier bridge, which is a synchronous rectification mode; or all the MOS switches are turned off at the moment, and the Ie current supplies power to the load through the MOS tube body diode at the moment, which is in an uncontrolled rectification mode; when the first lower bridge arm switch Q3 and the second lower bridge arm switch Q4 are simultaneously conducted, Re is equivalent to short circuit, Ve is zero at the moment, and the load Rout is provided with energy by the capacitor Co; the negative half cycle mode is similar to the positive half cycle and will not be described in detail.
Referring to fig. 4, in the duty ratio adjusting operation mode, the upper and lower tubes of each bridge arm are driven complementarily to prevent straight-through, and the high level conduction time is mainly driven by adjustment. The ratio of the simultaneous on-time of second lower leg switch Q4 and first lower leg switch Q3 to a switching cycle is defined as D, where T is a system switching cycle. The controllable rectifier circuit will be short-circuited for 2 DT times per switching cycle. The value range of the duty ratio D is 0-0.5. When the duty ratio D is equal to 0, the first upper arm switch Q1 and the second lower arm switch Q4 are turned on in the positive half cycle of the equivalent current Ie; the first lower bridge arm switch Q3 and the second upper bridge arm switch Q2 are conducted in the negative half cycle of the equivalent current Ie, and at the moment, the circuit is synchronous rectification, and the effect is similar to that of uncontrolled rectification. When the duty ratio D is 0.5, that is, the first lower arm switch Q3 and the second lower arm switch Q4 are continuously turned on, which is equivalent to a short circuit, theoretically, there is a maximum imaginary part, all energy is converted into reactive power, and no current is output to the load Rout side.
And under the phase-shifting working mode, the drive of each MOS tube is kept at 0.5, and the drive of the upper tube and the lower tube of each bridge arm are complementary to prevent straight-through. There are 2 possible operating modes for its short circuit condition: first upper arm switch Q1 and second upper arm switch Q2 are turned on and operated at the same time, and first lower arm switch Q3 and second lower arm switch Q4 are turned on and operated at the same time. In the time period, the equivalent load Re is equivalent to a short circuit, the energy received by the secondary side of the loosely coupled transformer cannot be transferred to the load Rout, and the load is powered by a capacitor Co; in other working periods, the diode is conducted, Ve is clamped by the output voltage, the loosely coupled transformer receives energy and transfers the energy to a load, and the output capacitor Co is charged.
It can be understood that the duty ratio D of the duty ratio adjustment for the operating characteristic during the phase shift control is similar in this embodiment, the operating principle is the same, and the function is equivalent, which is not described herein again. Therefore, the adjustment of the real part and the imaginary part of the equivalent load Re can be realized by adjusting the phase shift angle or adjusting the duty ratio, and the output load characteristic and the capability of tuning the resonant network are realized.
It can be understood that, in practical engineering applications, a method of simultaneously adjusting the phase shift and the duty ratio may also be adopted, and the functions are the same and will not be described herein again.
It is further understood that the controllable rectifying and regulating circuit 220 is illustrated by using a full bridge circuit composed of 4 switching tubes, but it is not meant that the present invention is illustrated by the embodiment, and includes but is not limited to some common circuit topologies as shown in fig. 9, and these circuit topologies can all realize the equivalent load Re adjustable through a certain control algorithm.
Referring to fig. 1 to 3, in an embodiment, the wireless charging system further includes wireless communication circuits (not shown) respectively disposed on a infrastructure side and a vehicle side, and the infrastructure sampling control circuit 140 and the vehicle detection control circuit 230 are communicatively connected through the wireless communication circuits.
In this embodiment, the wireless communication circuit may be a coupling circuit formed by the secondary coil Ls and the primary coil Lp, and the vehicle-mounted detection control circuit 230 may transmit information such as charging voltage, current, and power or control demand to the infrastructure sampling control circuit 140 through the secondary coil Ls. The infrastructure sampling control circuit 140 adjusts the output voltage by controlling the PFC circuit 110 and/or the DC-DC circuit and/or the inverter circuit 120 to adjust the current of the primary coil of the transformer. The wireless communication circuit can also adopt a wireless communication circuit which can be used for receiving and sending signals, such as a WIFI module, a radio frequency module, a Bluetooth module and the like.
Referring to fig. 1-3, in one embodiment, the wireless charging system further includes a battery manager (not shown) coupled to an output of the controllably rectifying regulator circuit 220.
The Battery manager, namely, a BMS (Battery Management System), is configured to detect and manage the electric quantity, voltage, and current of the Battery, and is connected to the vehicle-mounted detection control circuit 230 to output the working parameters to the vehicle-mounted detection control circuit 230, and the vehicle-mounted detection control circuit 230 may generate corresponding detection signals or control instructions to the infrastructure sampling control circuit 140 according to the working parameters detected by the Battery manager, so as to adjust and output the output voltage/output current at the infrastructure side. The battery manager improves the automation level of the whole automobile wireless charging system.
The invention also provides a wireless charging control method, which is suitable for the wireless charging system, and the wireless charging system comprises a PFC circuit, an inverter circuit, a primary side resonance network and a infrastructure sampling control circuit which are positioned on a infrastructure side, and a secondary side resonance network, a controllable rectification regulating circuit and a vehicle-mounted detection control circuit which are positioned on a vehicle-mounted side; referring to fig. 10, the wireless charging control method includes the steps of:
s100, detecting resonance parameters of an original secondary resonance network, and controlling the controllable rectification regulating circuit to work according to the detected resonance parameters of the original secondary resonance network so as to enable the primary resonance network and the secondary resonance network to be in resonance matching;
the resonance parameter can be obtained by detecting the midpoint voltage/current of the controllable rectifying and regulating circuit, looking up a table or calculating, and can also be obtained by directly detecting the parameter (such as mutual inductance M, or coupling coefficient K, etc.) of the current loosely coupled transformer. Of course, the resonance parameters may also be obtained through parameters such as the phase angle quantity of the primary Vin/Iin, the sampling quantity of the phase angle of the secondary impedance Zs, the magnitude of the secondary transformer current Is (during resonance matching, the reactive power Is minimum, and the current Is minimum), and the system efficiency (during resonance matching, the system efficiency Is highest).
The midpoint voltage/current of the full bridge of the controllable rectification regulating circuit is Ve/Ie respectively, and the equivalent impedance is Re. And the vehicle-mounted side is also provided with a vehicle-mounted battery, an output filter capacitor Co, an impedance matching resistor, an electric load and the like Rout. When the waveforms of the operation Ve and Ie of the controlled rectification and regulation circuit are as shown in fig. 5(b), the effective impedance at this time is Re, which can be expressed as:
as can be seen from the above equation, the equivalent impedance Re is not purely resistive, and is decomposed into a real part and an imaginary part as follows:
wherein the content of the first and second substances,
d is the duty ratio of the controllable rectification regulating circuit, namely Re is compared with the uncontrolled rectification/synchronous rectification, and the pure resistive load is equivalent to an introduction coefficient kreWhile adding a coefficient kimThe imaginary part of (c). The real part and the imaginary part of the equivalent impedance can be adjusted by adjusting different duty ratios D, and the real part and the imaginary part are connected with a resonant network of a system, which is equivalent to that a controllable resonant parameter adjusting quantity is connected in series in the original resonant network, and the variable resonant parameter adjusting quantity has the function of adjusting the output voltage/current characteristic.
The controllable rectification adjusting circuit can also adjust the resonant network by controlling the phase shift angle α, the specific adjusting mode of the controllable rectification adjusting circuit is the same as the mode of adjusting the duty ratio, the working principle is the same, and the realized technical effect is the same, therefore, the imaginary part and the real part of the equivalent impedance can be adjusted by adjusting the different phase shift angle α, the imaginary part is connected with the resonant network of the system, which is equivalent to connecting a controllable resonant parameter adjusting quantity in series in the original resonant network, the adjustment of the real part is equivalent to adjusting the output voltage/current characteristic, when the original resonant network is in the non-resonant matching state, the equivalent load imaginary part Re can be adjusted by adjusting the phase shift angle α of the controllable rectification adjusting circuit or the working parameter of the duty ratio, so that the system is in the resonant matching state again, and the better working characteristic of the system is achieved.
Step S200, detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control instruction;
in this embodiment, a current/voltage may be detected by using a current transformer, a hall sensor, or a detection circuit composed of resistors, capacitors, and other devices, so as to sample signals such as current and voltage of each controllable rectifying and regulating circuit.
Step S300, adjusting the output current and/or the output voltage of the inverter circuit of the PFC circuit according to the detection signal output by the vehicle detection control circuit 230.
The input voltage and the input current of the inverter circuit are defined herein as Vdc and Idc, where Vdc/Idc has a certain regulation range, which can be specifically regulated according to the output current and the output voltage of the vehicle-mounted side.
The wireless charging control method controls a PFC circuit to correct and rectify power factors of accessed alternating current through a infrastructure sampling control circuit positioned on a infrastructure side, controls an inverter circuit to invert the alternating current into alternating current, and transmits the alternating current to a controllable rectification adjusting circuit on a vehicle side through a primary side resonance network and a secondary side resonance network, and the infrastructure sampling control circuit and/or the vehicle detection control circuit adjust working parameters of the controllable rectification adjusting circuit according to resonance parameters of a system resonance network detected by the vehicle detection control circuit and the infrastructure sampling control circuit so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; the infrastructure sampling control circuit also detects the voltage and/or current output by the controllable rectification regulating circuit and generates a corresponding detection signal and/or control instruction, so that the infrastructure sampling control circuit is in communication connection with the vehicle-mounted detection control circuit 230, and the output current and/or output voltage of the PFC circuit and the inverter circuit are controlled and regulated according to the detection signal and/or control instruction output by the vehicle-mounted detection control circuit 230, and the charging voltage/current is adjustable. The invention realizes the resonance matching of the resonance network of the wireless charging system and the adjustability of the charging voltage/current.
In addition, it should be noted that, in another embodiment, the output current and/or the output voltage of the DC-DC circuit may also be controlled and adjusted to achieve charging voltage/current adjustability, or the output current and/or the output voltage of one or more combinations of the PFC circuit, the DC-DC circuit, and the inverter circuit may also be controlled and adjusted to achieve charging voltage/current adjustability. The DC-DC circuit is an optional circuit, that is, in practical engineering application, the circuit may be omitted, and the system regulation and control principle after the omission is not changed, which is not described herein again; in addition, since the inverter circuit output voltage Vin and the primary coil current Ip are in a proportional relationship, the primary coil current Ip and the inverter circuit output voltage Vin are equivalent and interchangeable in the control description of this patent.
In an embodiment, the step of detecting a resonance parameter of a system resonance network and controlling the controllable rectification adjusting circuit to operate according to the detected resonance parameter of the primary and secondary resonance networks to enable the primary resonance network and the secondary resonance network to be in resonance matching specifically includes:
and looking up a table or calculating working parameters of the controllable rectification regulating circuit according to the detected resonance parameters of the primary and secondary resonance networks, or continuously adjusting the working parameters of the controllable rectification regulating circuit until the primary resonance network and the secondary resonance network are in resonance matching.
The real part and the imaginary part of the equivalent impedance can be adjusted by adjusting different duty ratios D or phase shift angles, the imaginary part is connected with a resonant network of the system, and equivalently, a controllable resonant parameter adjusting quantity is connected in series in the original resonant network; the adjustment of the real part is equivalent to the adjustment of the output voltage/current characteristic. When the original resonant network is in a non-resonant matching state, the duty ratio D or the phase shift angle of the controllable rectification adjusting circuit and/or the working parameters of the phases of the voltage Ve and the Ie can be directly generated according to the difference value between the detected resonant parameter and the preset resonant parameter, or the duty ratio D or the phase shift angle of the controllable rectification adjusting circuit and/or the phases of the voltage Ve and the Ie can be continuously adjusted according to the detection result until the current resonant parameter is matched with the preset resonant parameter, so that the system is in a resonant matching state again, and the optimal working characteristic of the system is achieved.
For better illustration of the wireless charging system and method, referring to fig. 3, in conjunction with all the above embodiments, the primary side compensation network and the secondary side compensation network are both LCCs as an example for illustration. The primary LCC compensation network comprises a compensation inductor L1, a compensation capacitor C1 and a compensation capacitor Cp; the secondary LCC compensation network comprises a compensation inductor L2, a compensation capacitor C2 and a compensation capacitor Cs as compensation parameters.
The equivalent resistance Re of the controllable rectifying and regulating circuit is further decomposed into an imaginary part and a real part, wherein the secondary impedance can be expressed as:
the primary input impedance is as follows:
therefore, as can be seen from the above formula, when the equivalent resistance Re changes, the secondary impedance Zs and the primary input impedance Zin are further affected; similarly, when the primary self-inductance Lp, the secondary self-inductance Ls and the mutual inductance M of the parameters of the loosely coupled transformer are changed, the resonant network and the impedance of the whole system can be further adjusted by adjusting the real part and the imaginary part of Re.
The invention also provides an automobile wireless charging device which comprises the wireless charging system. The detailed structure of the wireless charging system can refer to the above embodiments, and is not described herein again; it can be understood that, because the wireless charging system is used in the wireless charging device for an automobile of the present invention, embodiments of the wireless charging device for an automobile of the present invention include all technical solutions of all embodiments of the wireless charging system, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A wireless charging system, comprising:
the PFC circuit, the inverter circuit, the primary side resonant network and the infrastructure sampling control circuit are positioned at the infrastructure side;
the secondary side resonance network, the controllable rectification adjusting circuit and the vehicle-mounted detection control circuit are positioned on the vehicle-mounted side; the infrastructure sampling control circuit controls the PFC circuit to correct and rectify power factors of accessed alternating current, controls the inverter circuit to invert the alternating current into alternating current, and transmits the alternating current to the controllable rectification regulating circuit through the primary side resonant network and the secondary side resonant network; the infrastructure sampling control circuit is in communication connection with the vehicle-mounted detection control circuit,
the infrastructure sampling control circuit and/or the vehicle-mounted detection control circuit adjust working parameters of the controllable rectification adjusting circuit according to resonance parameters of the system resonance network detected by the vehicle-mounted detection control circuit and the infrastructure sampling control circuit so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching; detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or a corresponding control command;
and controlling and adjusting the output current and/or the output voltage of the PFC circuit and the inverter circuit according to a detection signal and/or a control instruction output by the vehicle-mounted detection control circuit, so that the charging voltage/current is adjustable.
2. The wireless charging system of claim 1, wherein the infrastructure sampling control circuit further controls and adjusts a phase shift angle of the inverter circuit according to a detection signal and/or a control command output by the on-board detection control circuit to adjust an output current and/or an output voltage of the inverter circuit.
3. The wireless charging system of claim 1, wherein the controlled rectifier regulation circuit comprises a first upper leg switch in series with a first lower leg switch to form a first leg circuit, a second upper leg switch in series with a second lower leg switch to form a second leg circuit, a first lower leg switch, and a second lower leg switch.
4. The wireless charging system according to any one of claims 1 to 3, further comprising wireless communication circuits respectively disposed on a infrastructure side and a vehicle-mounted side, wherein the infrastructure sampling control circuit and the vehicle-mounted detection control circuit are communicatively connected through the wireless communication circuits.
5. The wireless charging system according to any one of claims 1 to 3, further comprising a DC-DC circuit on a infrastructure side, the DC-DC circuit being disposed in series between the PFC circuit and the inverter circuit.
6. A wireless charging control method is applied to a wireless charging system, and the wireless charging system comprises a PFC circuit, an inverter circuit, a primary side resonance network and a infrastructure sampling control circuit which are positioned on a infrastructure side, and a secondary side resonance network, a controllable rectification regulating circuit and a vehicle-mounted detection control circuit which are positioned on a vehicle-mounted side; the wireless charging control method is characterized by comprising the following steps:
detecting original secondary side resonance parameters, and controlling the controllable rectification regulating circuit to work according to the detected resonance parameters of the original secondary side resonance network so as to enable the original side resonance network and the secondary side resonance network to be in resonance matching;
detecting the voltage and/or current output by the controllable rectification regulating circuit and generating a corresponding detection signal and/or control signal;
and adjusting the output current and/or the output voltage of the PFC circuit and the inverter circuit according to the detection signal and/or the control instruction output by the vehicle-mounted detection control circuit.
7. The wireless charging control method according to claim 6, wherein the step of detecting a resonance parameter of the system resonance network and controlling the operation of the controllable rectification regulating circuit according to the detected resonance parameter so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching specifically comprises:
and looking up a table or calculating working parameters of the controllable rectification regulating circuit according to the detected resonance parameters of the system resonance network so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching.
8. The wireless charging control method according to claim 6, wherein the step of detecting the resonance parameter of the system resonance network and controlling the operation of the controllable rectification regulating circuit according to the detected resonance parameter of the resonance network so as to enable the primary side resonance network and the secondary side resonance network to be in resonance matching specifically comprises:
and continuously adjusting the working parameters of the controllable rectification regulating circuit until the primary side resonance network and the secondary side resonance network are in resonance matching.
9. The wireless charge control method according to claim 7 or 8, wherein the operating parameters include a duty cycle or phase shift angle of the controllable rectification regulation circuit, and a phase relationship of the voltage Ve and the current Ie.
10. A wireless charging device for a vehicle, comprising the wireless charging system according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344024.8A CN110994811A (en) | 2019-12-20 | 2019-12-20 | Wireless charging system, control method and automobile wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911344024.8A CN110994811A (en) | 2019-12-20 | 2019-12-20 | Wireless charging system, control method and automobile wireless charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110994811A true CN110994811A (en) | 2020-04-10 |
Family
ID=70076029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911344024.8A Pending CN110994811A (en) | 2019-12-20 | 2019-12-20 | Wireless charging system, control method and automobile wireless charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110994811A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463876A (en) * | 2020-05-15 | 2020-07-28 | 中兴新能源汽车有限责任公司 | Wireless charging control method, system and storage medium thereof |
| CN111740505A (en) * | 2020-07-03 | 2020-10-02 | 浙江大学 | Method for realizing PFC (Power factor correction) only through primary side phase shift control |
| CN112217294A (en) * | 2020-08-19 | 2021-01-12 | 浙江大学 | Non-communication constant current control method applied to bidirectional wireless power transmission circuit |
| CN112421790A (en) * | 2021-01-21 | 2021-02-26 | 深圳赫兹创新技术有限公司 | Derating control method and device for wireless charging system and wireless charging system |
| CN114347814A (en) * | 2020-10-13 | 2022-04-15 | 许继集团有限公司 | Ground terminal mode soft switching method and system for wireless charging system of electric vehicle |
| CN115986960A (en) * | 2023-02-15 | 2023-04-18 | 合肥有感科技有限责任公司 | Wireless charging system configuration method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170346344A1 (en) * | 2016-05-27 | 2017-11-30 | Rohm Co., Ltd. | Wireless power receiver |
| CN109302070A (en) * | 2018-10-09 | 2019-02-01 | 李建科 | Power converter circuit topological structure and its control method |
| CN109391044A (en) * | 2018-11-14 | 2019-02-26 | 中国矿业大学 | A kind of efficient pressure stabilizing complex control system of inductive electric energy transmission system and method |
| CN109747443A (en) * | 2019-03-24 | 2019-05-14 | 哈尔滨理工大学 | A kind of magnet coupled resonant type wireless charging system for electric automobile |
| CN110228378A (en) * | 2019-05-30 | 2019-09-13 | 西安交通大学 | A kind of bilateral multiple feedback loop method for electric car wireless charging |
| US20190366866A1 (en) * | 2018-06-01 | 2019-12-05 | Hyundai Motor Company | Method and apparatus for controlling wireless power transfer to electric vehicle using bridgeless rectifier |
| JP2019213265A (en) * | 2018-05-31 | 2019-12-12 | 株式会社Ｓｏｋｅｎ | Non-contact power reception device |
| CN110562061A (en) * | 2019-09-02 | 2019-12-13 | 中兴新能源汽车有限责任公司 | wireless charging vehicle terminal voltage control circuit, method and device and charging equipment |
-
2019
- 2019-12-20 CN CN201911344024.8A patent/CN110994811A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170346344A1 (en) * | 2016-05-27 | 2017-11-30 | Rohm Co., Ltd. | Wireless power receiver |
| JP2019213265A (en) * | 2018-05-31 | 2019-12-12 | 株式会社Ｓｏｋｅｎ | Non-contact power reception device |
| US20190366866A1 (en) * | 2018-06-01 | 2019-12-05 | Hyundai Motor Company | Method and apparatus for controlling wireless power transfer to electric vehicle using bridgeless rectifier |
| CN109302070A (en) * | 2018-10-09 | 2019-02-01 | 李建科 | Power converter circuit topological structure and its control method |
| CN109391044A (en) * | 2018-11-14 | 2019-02-26 | 中国矿业大学 | A kind of efficient pressure stabilizing complex control system of inductive electric energy transmission system and method |
| CN109747443A (en) * | 2019-03-24 | 2019-05-14 | 哈尔滨理工大学 | A kind of magnet coupled resonant type wireless charging system for electric automobile |
| CN110228378A (en) * | 2019-05-30 | 2019-09-13 | 西安交通大学 | A kind of bilateral multiple feedback loop method for electric car wireless charging |
| CN110562061A (en) * | 2019-09-02 | 2019-12-13 | 中兴新能源汽车有限责任公司 | wireless charging vehicle terminal voltage control circuit, method and device and charging equipment |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463876A (en) * | 2020-05-15 | 2020-07-28 | 中兴新能源汽车有限责任公司 | Wireless charging control method, system and storage medium thereof |
| CN111740505A (en) * | 2020-07-03 | 2020-10-02 | 浙江大学 | Method for realizing PFC (Power factor correction) only through primary side phase shift control |
| CN111740505B (en) * | 2020-07-03 | 2022-02-08 | 浙江大学 | Method for realizing PFC (Power factor correction) only through primary side phase shift control |
| CN112217294A (en) * | 2020-08-19 | 2021-01-12 | 浙江大学 | Non-communication constant current control method applied to bidirectional wireless power transmission circuit |
| CN112217294B (en) * | 2020-08-19 | 2022-05-13 | 浙江大学 | Non-communication constant current control method applied to bidirectional wireless power transmission circuit |
| CN114347814A (en) * | 2020-10-13 | 2022-04-15 | 许继集团有限公司 | Ground terminal mode soft switching method and system for wireless charging system of electric vehicle |
| CN112421790A (en) * | 2021-01-21 | 2021-02-26 | 深圳赫兹创新技术有限公司 | Derating control method and device for wireless charging system and wireless charging system |
| CN112421790B (en) * | 2021-01-21 | 2021-05-28 | 深圳赫兹创新技术有限公司 | Derating control method and device for wireless charging system and wireless charging system |
| CN115986960A (en) * | 2023-02-15 | 2023-04-18 | 合肥有感科技有限责任公司 | Wireless charging system configuration method |
| CN115986960B (en) * | 2023-02-15 | 2023-11-10 | 合肥有感科技有限责任公司 | Wireless charging system configuration method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110949152B (en) | Wireless charging system and method and automobile wireless charging device | |
| CN110936827B (en) | Wireless charging system, wireless charging control method and automobile wireless charging device | |
| CN110994811A (en) | Wireless charging system, control method and automobile wireless charging device | |
| Chen et al. | A switching hybrid LCC-S compensation topology for constant current/voltage EV wireless charging | |
| WO2022021950A1 (en) | Bilateral lcc compensation network adjustment method and system for wireless charging system | |
| US20210226473A1 (en) | Receive end and transmit end of wireless charging system, method, electrical terminal, and system | |
| CN110979042B (en) | Wireless charging receiving device, wireless charging control method and wireless charging system | |
| WO2021082408A1 (en) | Wireless charging receiving end, system and control method | |
| Wu et al. | A dual-sided control strategy based on mode switching for efficiency optimization in wireless power transfer system | |
| CN210608706U (en) | Induction type wireless power transmission system for realizing constant-current and constant-voltage output switching | |
| CN112366777B (en) | Constant-current constant-voltage induction type wireless charging system based on secondary variable structure | |
| Kavimandan et al. | Analysis and demonstration of a dynamic ZVS angle control using a tuning capacitor in a wireless power transfer system | |
| CN112219333B (en) | Wireless charging transmitting device, transmitting method and wireless charging system | |
| US11557921B2 (en) | Wireless power system | |
| WO2021083287A1 (en) | Wireless charging receiver, system and control method | |
| Wang et al. | A novel converter topology for a primary-side controlled wireless EV charger with a wide operation range | |
| Cao et al. | An IPT system with constant current and constant voltage output features for EV charging | |
| Zhang et al. | A hybrid compensation topology with single switch for battery charging of inductive power transfer systems | |
| Wang et al. | Widening the operating range of a wireless charging system using tapped transmitter winding and bifrequency pulse train control | |
| Yang et al. | An LCC-SP compensated inductive power transfer system and design considerations for enhancing misalignment tolerance | |
| CN211236016U (en) | Frequency online detection circuit for constant voltage or constant current output in wireless power transmission | |
| CN110936828A (en) | Wireless charging receiving device, wireless charging control method and electric automobile | |
| CN112706643B (en) | Charging current control method and wireless charging system of electric automobile | |
| CN112260416B (en) | Constant-current constant-voltage induction type wireless charging system based on variable primary parameters | |
| EP3669438B1 (en) | Contactless electrical energy transfer system and operating method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |