Single-source dual-frequency excitation source system for wireless power transmission and control method

Abstract

The invention discloses a single-source dual-frequency excitation source system for wireless power transmission and a control method, and relates to the technical field of wireless power transmission, the single-source dual-frequency excitation source system for wireless power transmission comprises a dual-frequency excitation source module, a wireless power transmission module A, a wireless power transmission module B, a switch S1, a switch S2 and a controller module. In the system control, superposition control based on decoupling is adopted, that is, power decoupling is performed on the wireless electric energy transmission module A and the wireless electric energy transmission module B, relatively independent control is performed on respective power requirements, and linear superposition is performed on respective parameters of the wireless electric energy transmission module A and the wireless electric energy transmission module B in the system control. The single excitation source is adopted to excite wireless electric energy transmission of two different frequencies, the frequency conversion excitation capability is achieved, the system cost is effectively reduced, the circuit structure is simple, reliable and practical, and control is flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless power transmission, and in particular to a single-source dual-frequency excitation source system and a control method for wireless power transmission. Background Art

[0002] In the application of wireless power transmission technology, the wireless power transmission module needs to be excited by an excitation source so that the wireless power transmission module can work. If the resonant frequency of the wireless power transmission module is different, the output frequency of the excitation source required by the wireless power transmission module is also different. In the related art, when multiple wireless power transmission modules have different resonant frequencies, it is necessary to set an excitation source for each wireless power transmission module of each resonant frequency. This results in a large number of excitation sources being set, which consumes a lot of cost. Summary of the invention

[0003] The present invention provides a single-source dual-frequency excitation source system, control method, device and computer program product for wireless power transmission, which uses a single excitation source to excite two or more wireless power transmission modules with different frequencies, effectively reducing circuit costs.

[0004] In a first aspect, a single-source dual-frequency excitation source system for wireless power transmission is provided, comprising: a dual-frequency excitation source module, a first wireless power transmission module, a second wireless power transmission module, a first switch, a second switch and a controller module; the first wireless power transmission module is connected in parallel with the first switch to form a first component, the second wireless power transmission module is connected in parallel with the second switch to form a second component, and the first component is connected in series with the second component; the dual-frequency excitation source module is at the front end of the system, the rear end of the dual-frequency excitation source module is connected to the first component and the second component after being connected in series, and the controller module is used to control the dual-frequency excitation source module; the dual-frequency excitation source module is used to excite the first wireless power transmission module and the second wireless power transmission module respectively, or to excite the first wireless power transmission module and the second wireless power transmission module at the same time; when the first switch is disconnected and the second switch is disconnected, the first switch is disconnected and the second switch is disconnected. When closed, the dual-frequency excitation source module excites only the first wireless power transmission module; when the first switch is closed and the second switch is disconnected, the dual-frequency excitation source module excites only the second wireless power transmission module; when the first switch and the second switch are both disconnected, the dual-frequency excitation source module excites both the first wireless power transmission module and the second wireless power transmission module; the controller module controls the dual-frequency excitation source module by performing waveform superposition and combination on the resonant frequencies and magnitudes of the first wireless power transmission module and the second wireless power transmission module as a signal wave input into the controller module; the dual-frequency excitation source module adopts a power electronic inverter topology; the signal wave of the dual-frequency excitation source module comes from the controller module, and the waveform of the signal wave includes a combination of the first resonant frequency of the first wireless power transmission module and the second resonant frequency of the second wireless power transmission module.

[0005] In combination with the first aspect, the first wireless power transmission module and the second wireless power transmission module adopt a wireless power transmission circuit topology structure, and the power electronic inverter topology adopted by the dual-frequency excitation source module is a half-bridge inverter circuit or a full-bridge inverter circuit.

[0006] In combination with the first aspect, the first resonant frequency of the first wireless power transmission module is the same frequency or different frequency as the second resonant frequency of the second wireless power transmission module, the first resonant frequency of the first wireless power transmission module is fixed frequency or variable frequency, the second resonant frequency of the second wireless power transmission module is fixed frequency or variable frequency, the first wireless power transmission module and the second wireless power transmission module work simultaneously or at different times, and the first wireless power transmission module and the second wireless power transmission module respectively perform output amplitude control.

[0007] In combination with the first aspect, the first resonant frequency of the first wireless power transmission module or the second resonant frequency of the second wireless power transmission module is variable frequency, the controller module and the dual-frequency excitation source module have variable frequency excitation capabilities, and the system has dual variable frequency excitation capabilities.

[0008] In combination with the first aspect, it also includes: a third wireless power transmission module and a third switch, the third wireless power transmission module and the third switch are connected in parallel to form a third component, and the third component is connected in series with the first component and the second component; the dual-frequency excitation source module is used to respectively excite the first wireless power transmission module, the second wireless power transmission module or the third wireless power transmission module, or to excite the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module at the same time; when the third switch is disconnected and the first switch and the second switch are closed, the dual-frequency excitation source module excites only the third wireless power transmission module, and when the first switch, the second switch are closed, the dual-frequency excitation source module excites only the third wireless power transmission module. When the second switch and the third switch are both disconnected, the dual-frequency excitation source module simultaneously excites the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module; the controller module controls the dual-frequency excitation source module by performing waveform superposition and combination on the resonant frequencies and sizes of the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module as a signal wave input into the controller module; the waveform of the signal wave of the dual-frequency excitation source module includes the first resonant frequency of the first wireless power transmission module, the second resonant frequency of the second wireless power transmission module and the third resonant frequency of the third wireless power transmission module.

[0009] In combination with the first aspect, the first wireless power transmission module also includes: a first inductor and a first capacitor, the first inductor is connected in series or in parallel with the first capacitor, the inductance value of the first inductor is adjustable or the capacitance value of the first capacitor is adjustable; the second wireless power transmission module also includes: a second inductor and a second capacitor, the second inductor is connected in series or in parallel with the second capacitor, the inductance value of the second inductor is adjustable or the capacitance value of the second capacitor is adjustable.

[0010] In a second aspect, a control method for a single-source dual-frequency excitation source system for wireless power transmission is provided, which is applied to the single-source dual-frequency excitation source system for wireless power transmission as in the first aspect, and the method comprises: the controller obtains a first resonant frequency and a first amplitude of a first signal of a first wireless power transmission module; the controller obtains a second resonant frequency and a second amplitude of a second signal of a second wireless power transmission module; the controller determines a third frequency and a third amplitude of an output signal of the excitation source based on the first resonant frequency, the first amplitude, the second resonant frequency and the second amplitude; the controller sends the third frequency and the third amplitude to the excitation source.

[0011] In combination with the second aspect, the controller determines the third frequency and third amplitude of the excitation source output signal based on the first resonant frequency, the first amplitude, the second resonant frequency and the amplitude, including: the controller determines the third frequency based on the sum of the first resonant frequency and the second resonant frequency; the controller determines the third amplitude based on the sum of the first amplitude and the second amplitude.

[0012] According to a third aspect, an electronic device is provided, comprising the single-source dual-frequency excitation source system for wireless power transmission according to the first aspect and a housing, wherein the single-source dual-frequency excitation source system for wireless power transmission is arranged in the housing.

[0013] According to a fourth aspect, a computer program product is provided, comprising a computer program, wherein when the computer program is executed by a controller, the method according to the second aspect is implemented.

[0014] According to the above aspects, the solution provided by the embodiment of the present application uses a single excitation source to excite two wireless power transmissions of different frequencies and has variable frequency excitation capability, effectively reducing system costs, and the circuit structure is simple, reliable and practical, and the control is flexible. The circuit topology of this system is simple and practical, the control effect is good and the cost is low, which is a good low-cost solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural block diagram of a single-source dual-frequency excitation source system for wireless power transmission according to an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of waveform superposition and combination according to an embodiment of the present application;

[0017] Figure 3 A schematic diagram of superposition of signals of different frequencies in an embodiment of the present application;

[0018] Figure 4 The waveform of the embodiment of the present application is superimposed with two groups of LC connected in parallel and then in series. Simulink simulation and waveform diagram;

[0019] Figure 5 The waveform of the embodiment of the present application is superimposed with two groups of LC series connected in series and then connected in series with Simulink simulation and waveform diagram;

[0020] Figure 6 This is a control schematic diagram of an embodiment of the present application;

[0021] Figure 7 This is the main circuit diagram of the dual-frequency excitation source module of the embodiment of the present application;

[0022] Figure 8 A main circuit diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0023] Reference Figure 1 , Figure 1 This is a structural block diagram of a single-source dual-frequency excitation source system for wireless power transmission according to an embodiment of the present application.

[0024] The single-source dual-frequency excitation source system for wireless power transmission includes: a dual-frequency excitation source module 1, a first wireless power transmission module 2 (hereinafter taking wireless power transmission module A as an example), a second wireless power transmission module 3 (hereinafter taking wireless power transmission module B as an example), a first switch (hereinafter taking switch S1 as an example), a second switch (hereinafter taking switch S2 as an example) and a controller module 4. The wireless power transmission module A is connected in parallel with the switch S1 to form a first component, the wireless power transmission module B is connected in parallel with the switch S2 to form a second component, and the first component is connected in series with the second component. The dual-frequency excitation source module is at the front end of the system, and the rear end of the dual-frequency excitation source module is connected to the first component and the second component after being connected in series, and the controller module is used to control the dual-frequency excitation source module. The dual-frequency excitation source module is used to excite the wireless power transmission module A and the wireless power transmission module B respectively, or to excite the wireless power transmission module A and the wireless power transmission module B at the same time. When the switch S1 is disconnected and the switch S2 is closed, the dual-frequency excitation source module excites only the wireless power transmission module A. When the switch S1 is closed and the switch S2 is open, the dual-frequency excitation source module only excites the wireless power transmission module B. When both the switch S1 and the switch S2 are open, the dual-frequency excitation source module excites the wireless power transmission module A and the wireless power transmission module B at the same time. The controller module controls the dual-frequency excitation source module by superimposing and combining the waveforms of the resonant frequencies and magnitudes of the wireless power transmission module A and the wireless power transmission module B as a signal wave input into the controller module. The dual-frequency excitation source module adopts a power electronic inverter topology. The signal wave of the dual-frequency excitation source module comes from the controller module, and the waveform of the signal wave includes a combination of the first resonant frequency of the wireless power transmission module A and the second resonant frequency of the wireless power transmission module B.

[0025] Exemplarily, the first resonant frequency is f1, and the second resonant frequency is f2.

[0026] In some embodiments, the wireless power transmission module A and the wireless power transmission module B adopt a wireless power transmission circuit topology structure, and the power electronic inverter topology adopted by the dual-frequency excitation source module is a half-bridge inverter circuit or a full-bridge inverter circuit.

[0027] In some embodiments, the first resonant frequency of the wireless power transmission module A is the same frequency or different frequency as the second resonant frequency of the wireless power transmission module B, the first resonant frequency of the wireless power transmission module A is fixed frequency or variable frequency, the second resonant frequency of the wireless power transmission module B is fixed frequency or variable frequency, the wireless power transmission module A and the wireless power transmission module B work simultaneously or at different times, and the wireless power transmission module A and the wireless power transmission module B perform output amplitude control respectively.

[0028] In some embodiments, the first resonant frequency f1 of the wireless power transmission module A or the second resonant frequency f2 of the wireless power transmission module B is variable frequency, the controller module and the dual-frequency excitation source module have variable frequency excitation capability, and the system has dual variable frequency excitation capability.

[0029] In some embodiments, the system provided by the embodiment of the present application also includes: a wireless power transmission module C (hereinafter referred to as the wireless power transmission module C) and a switch S3 (hereinafter referred to as the switch S3), the wireless power transmission module C and the switch S3 are connected in parallel to form a third component, and the third component is connected in series with the first component and the second component; the dual-frequency excitation source module is used to respectively excite the wireless power transmission module A, the wireless power transmission module B or the wireless power transmission module C, or to excite the wireless power transmission module A, the wireless power transmission module B and the wireless power transmission module C at the same time; when the switch S3 is disconnected and the switch S1 and the switch S2 are closed, the dual-frequency excitation source module excites only the wireless power transmission module A, the wireless power transmission module B or the wireless power transmission module C. The wireless power transmission module C, when the switch S1, the switch S2 and the switch S3 are all disconnected, the dual-frequency excitation source module simultaneously excites the wireless power transmission module A, the wireless power transmission module B and the wireless power transmission module C; the controller module performs waveform superposition and combination on the resonant frequencies and sizes of the wireless power transmission module A, the wireless power transmission module B and the wireless power transmission module C as a signal wave input into the controller module to control the dual-frequency excitation source module; the waveform of the signal wave of the dual-frequency excitation source module includes the first resonant frequency of the wireless power transmission module A, the second resonant frequency of the wireless power transmission module B and the third resonant frequency of the wireless power transmission module C combined and superimposed.

[0030] In some embodiments, the system provided by the embodiment of the present application further includes: a fourth component, a fifth component, an Nth component, etc., where N is an integer. The configuration of the fourth component, the fifth component, and the Nth component in the system can refer to the first component, the second component, or the third component, and will not be repeated.

[0031] In some embodiments, N is less than 10. By setting the number of components within 10, the dual-frequency excitation source module does not need to excite more modules, thereby ensuring the stability of the system.

[0032] For example, refer to Figure 2 , Figure 2 This is a schematic diagram of the waveform superposition combination of an embodiment of the present application.

[0033] This embodiment adopts the waveform superposition principle to obtain the reference signal wave u R The two sine waves u1 and u2 of different frequencies are superimposed to obtain the signal wave u R Output. The frequency of the sine wave u1 is f1, which corresponds to the resonant frequency f1 of the wireless power transmission module A; the frequency of the sine wave u2 is f2, which corresponds to the resonant frequency f2 of the wireless power transmission module B; under working condition 1, the reference signal wave u R =u1, working condition 2 u R =u2, reference signal wave u in working condition 3 R =u1+u2. According to actual work needs, different signal waves u are obtained by control. R .

[0034] Reference Figure 3 , Figure 3 Schematic diagram of signal superposition of different frequencies in the embodiment of the present application. Take the sine wave u1 as the resonance signal of the wireless power transmission module A and the sine wave u2 as the resonance signal of the wireless power transmission module B as an example. Figure 3 In the figure, the sine wave u1 is represented by a dotted line, with a frequency of f1 = 150kHz and an amplitude of U A1 =1V. The sine wave u2 is represented by a dotted line, with a frequency of f2 = 50kHz and an amplitude of U A2 =1V. The signal waveform after the superposition of sine waves u1 and u2 is shown as a solid line. It should be noted that the frequencies f1 and f2 of the sine waves u1 and u2 in the embodiment of the present application are only an example. In actual applications, the frequencies f1 and f2 are determined by actual needs, and both f1 and f2 can be changed dynamically as needed.

[0035] In some embodiments, the switch S1 and the switch S2 are AC switches.

[0036] In some embodiments, the first wireless power transmission module further includes: a first inductor and a first capacitor. Exemplarily, the first inductor is connected in series with the first capacitor. Exemplarily, the first inductor is connected in parallel with the first capacitor.

[0037] In some embodiments, the second wireless power transmission module further includes: a second inductor and a second capacitor. Exemplarily, the second inductor is connected in series with the second capacitor. Exemplarily, the second inductor is connected in parallel with the second capacitor.

[0038] In some embodiments, the inductance value of the first inductor is adjustable or the capacitance value of the first capacitor is adjustable. The inductance value of the second inductor is adjustable or the capacitance value of the second capacitor is adjustable.

[0039] When the first inductor or the first capacitor changes, the resonant frequency of the first wireless power transmission module may change. The controller module can obtain the fourth resonant frequency of the first wireless power transmission module after the change, and transmit the fourth resonant frequency to the excitation source module. Alternatively, when both the first wireless power transmission module and the second wireless power transmission module are working, for example, both switch S1 and switch S2 are disconnected, the controller module can determine the fifth frequency based on the fourth resonant frequency and the second resonant frequency, and send the fifth frequency to the excitation source. Among them, the fifth frequency is the signal frequency required for the first wireless power transmission module and the second wireless power transmission module to resonate together.

[0040] Similarly, when the second inductor or the second capacitor changes, the resonant frequency of the second wireless power transmission module may change. The controller module can obtain the changed sixth resonant frequency of the second wireless power transmission module and transmit the sixth resonant frequency to the excitation source module.

[0041] For another example, when the resonant frequency of the first wireless power transmission module and the resonant frequency of the second wireless power transmission module are both changed, the controller module can obtain the fourth resonant frequency of the first wireless power transmission module after the change and the sixth resonant frequency of the second wireless power transmission module after the change, and determine the seventh frequency. Among them, the seventh frequency is the signal frequency required for the first wireless power transmission module and the second wireless power transmission module to resonate together. The controller module transmits the seventh frequency to the excitation source module. Thereby, after the resonant frequencies of the first wireless power transmission module and the second wireless power transmission module change, they can still work simultaneously.

[0042] In some embodiments, the first resonant frequency of the first inductor and the first capacitor is different from the second resonant frequency of the second inductor and the second capacitor. In other words, the resonant frequencies of the first wireless power transmission module and the second wireless power transmission module are different. Through the circuit of the embodiment of the present application, wireless power transmission modules with different resonant frequencies can be made to resonate together, thereby eliminating the need to set up multiple excitation sources, reducing the number of excitation sources, and saving costs.

[0043] See also Figure 4 , Figure 4 To superimpose the waveform, two groups of LC are connected in parallel and then in series. Simulink simulation and waveform diagram.

[0044] Figure 4 a is the Simulink simulation diagram of waveform superposition after two groups of LC are connected in parallel and then in series. Figure 4 In a, the power supply is an AC voltage U1 with a frequency of f1 and an AC voltage U2 with a frequency of f2 connected in series to form a dual-frequency superposition power supply. L1 is connected in series with C1 and the resonant frequency is f1, L2 is connected in series with C2 and the resonant frequency is f2, V4, V5, and V6 are all voltage probes, and Scope is an oscilloscope.

[0045] Figure 4 b is the waveform superposition of two groups of LC in parallel and then in series Simulink simulation result waveform. Figure 4 In b, the blue dashed line is the V4 waveform, the green dotted line is the V5 waveform, and the red solid line is the V6 waveform. The data used in the simulation are as follows: the amplitudes of U1 and U2 are both 100V, R1=1mΩ, f1=50kHz, f2=150kHz, L1=10.13μH, L2=1.1222μH, C1=C2=1μF, the resonant frequency of L1 and C1 is f1=50kHz, and the resonant frequency of L2 and C2 is f2=150kHz. The simulation results show that the voltage waveform of the parallel L1 and C1 resonant cavity is the waveform of the power supply U1, and the voltage waveform of the parallel L2 and C2 resonant cavity is the waveform of the power supply U2, achieving resonant decoupling.

[0046] Figure 5 To superimpose the waveform, two groups of LC are connected in series and then connected in series. Simulink simulation and waveform diagram.

[0047] Figure 5 a is the waveform superposition and then the Simulink simulation diagram of two groups of LC connected in series. Figure 5 In a, the power supply is an AC voltage U1 with a frequency of f1 and an AC voltage U2 with a frequency of f2 connected in series to form a dual-frequency superposition power supply. L1 is connected in parallel with C1 and the resonant frequency is f1, L2 is connected in parallel with C2 and the resonant frequency is f2, V4, V5, and V6 are all voltage probes, and Scope2 is an oscilloscope.

[0048] Figure 5 b is the waveform superposition of two groups of LC in parallel and then in series Simulink simulation result waveform. Figure 5 In b, the red solid line is the V6 waveform, the green dotted line is the V4 waveform, and the blue dashed line is the V5 waveform. The data used in the simulation are as follows: the amplitudes of U1 and U2 are both 100V, R1=1mΩ, f1=50kHz, f2=150kHz, L1=10.13μH, L2=1.1222μH, C1=C2=1μF, the resonant frequency of L1 and C1 is f1, and the resonant frequency of L2 and C2 is f2. The simulation results show that the voltage waveform of the resonant cavity connected in series with L1 and C1 is the waveform of the power supply U2, and the voltage waveform of the resonant cavity connected in series with L2 and C2 is the waveform of the power supply U1, achieving resonant decoupling.

[0049] The resonant frequency f1 of the resonant cavity constructed by L1 and C1 is the same as the frequency of the AC power supply U1, and the resonant frequency f2 of the resonant cavity constructed by L2 and C2 is the same as the frequency of the AC power supply U2.

[0050] Reference Figure 6 , Figure 6 This is a control schematic diagram of an embodiment of the present application. Figure 6 a is a schematic diagram of the control of a wireless power transmission module with a dual-frequency excitation source stimulating two sending sides in a parallel structure topology; Figure 6 b is a control schematic diagram of a dual-frequency excitation source stimulating two wireless power transmission modules with a series topology on the sending side.

[0051] In some embodiments, sampling is performed from the wireless power transmission module side, and the system aims to achieve a single-source dual-frequency variable frequency excitation source.

[0052] If the resonant frequencies f1 and f2 are known, the voltage signal from the controller module to the dual-frequency excitation source module is directly u R =u1+u2, u1 frequency is f1, u2 frequency is f2, so that the dual-frequency excitation source module outputs u1+u2.

[0053] The wireless power transmission module A and the wireless power transmission module B are relatively independent. The system control of this embodiment adopts superposition control based on decoupling, that is, the power of the wireless power transmission module A and the wireless power transmission module B is decoupled, and the power requirements of each are controlled relatively independently, and the parameters of the wireless power transmission module A and the wireless power transmission module B are linearly superimposed in the system control.

[0054] The sending side excitation of wireless power transmission module A is u1 and the resonant frequency is f1, the sending side excitation of wireless power transmission module B is u2 and the resonant frequency is f2, then the dual-frequency excitation source output is controlled to be u1+u2; if only wireless power transmission module A needs to be excited, the dual-frequency excitation source output is controlled to be u1; if only wireless power transmission module B needs to be excited, the dual-frequency excitation source output is controlled to be u2.

[0055] Figure 7 This is the main circuit diagram of the dual-frequency excitation source module of an embodiment of the present application.

[0056] The excitation source module can be used to realize pulse excitation of power electronic inverter topology.

[0057] In some embodiments, the dual-frequency excitation source module adopts a full-bridge inverter circuit, and the main circuit is composed of four power switching devices Q1-Q4. The signal wave of the dual-frequency excitation source module comes from the controller module, and the signal waveform includes a combination of the wireless power transmission resonant frequency f1 and the wireless power transmission resonant frequency f2.

[0058] Exemplarily, the power switch device is a metal oxide semiconductor field effect transistor (MOSFET).

[0059] In another exemplary embodiment, the power switch device is a wide bandgap power switch device.

[0060] In other embodiments, the excitation source module is implemented as a half-bridge inverter circuit.

[0061] Figure 8 A main circuit diagram provided for an embodiment of the present application.

[0062] Figure 8 a is a topology diagram in which the sending sides of wireless power transmission module A and wireless power transmission module B both adopt parallel connection.

[0063] The sending sides of wireless power transmission module A and wireless power transmission module B both adopt parallel topology, and AC switches F1 and F2 are installed at the output ends of the receiving sides of wireless power transmission I and II to implement output on-off control.

[0064] Figure 8 b is a topology diagram in which both the wireless power transmission module A and the wireless power transmission module B adopt a series connection on the sending side.

[0065] The sending sides of the wireless power transmission module A and the wireless power transmission module B both adopt a series topology, and AC switches F1 and F2 are installed at the output ends of the receiving sides of the wireless power transmission I and II to implement output on-off control.

[0066] In some embodiments, the dual-frequency excitation source module uses a full-bridge inverter circuit composed of four MOSFET tubes. AC switches F1, F2, S1 and S2 are all AC switches. Exemplarily, the AC switch includes a relay or a power electronic AC switch.

[0067] In some embodiments, the power electronic AC switch is a power switch tube, such as a MOSFET power electronic AC switch. By selecting a MOSFET power electronic AC switch, the conduction loss of the circuit is low and the control is simple.

[0068] In some other embodiments, the circuit topology of the first wireless power transmission module and the second wireless power transmission module is a relay topology.

[0069] In other embodiments, when the resonant frequencies f1 and f2 of the wireless power transmission module A and the wireless power transmission module B are variable, the controller module and the dual-frequency excitation source module have corresponding variable frequency excitation capabilities, and the system provided in the embodiment of the present application has dual variable frequency excitation capabilities.

[0070] The present invention uses a single excitation source to excite two wireless power transmissions of different frequencies and has variable frequency excitation capability, effectively reducing system costs, and the circuit structure is simple, reliable and practical, with flexible control. The present invention has a simple and practical circuit topology, good control effect and low cost, and is a good low-cost solution.

[0071] In some embodiments, the circuit provided in the embodiments of the present application can be applied in the field of multi-output civilian household appliances.

[0072] In some embodiments, the circuit provided in the embodiments of the present application can be applied in the field of electric vehicle charging.

[0073] In summary, the circuit provided in the embodiment of the application can excite two wireless power transmission modules of different frequencies through a single excitation source. In addition, each wireless power transmission module can change the frequency. The circuit provided in the embodiment of the application is flexible in control and can effectively reduce system costs.

[0074] The present application also provides a control method for a single-source dual-frequency excitation source system for wireless power transmission, which is applied to the single-source dual-frequency excitation source system for wireless power transmission provided in the above embodiment. The method includes the following steps:

[0075] S100: A controller obtains a first resonant frequency and a first amplitude of a first signal of a first wireless power transmission module.

[0076] S200: The controller obtains a second resonant frequency and a second amplitude of a second signal of a second wireless power transmission module.

[0077] S00. The controller determines a third frequency and a third amplitude of an output signal of an excitation source according to the first resonant frequency, the first amplitude, the second resonant frequency and the second amplitude.

[0078] S400: The controller sends the third frequency and the third amplitude to the excitation source.

[0079] In some embodiments, S300 includes S310 and S320.

[0080] S310: The controller determines the third frequency according to the sum of the first resonant frequency and the second resonant frequency.

[0081] S320: The controller determines the third amplitude according to the sum of the first amplitude and the second amplitude.

[0082] An embodiment of the present application further provides an electronic device, comprising the single-source dual-frequency excitation source system for wireless power transmission provided in the above embodiment and a housing, wherein the single-source dual-frequency excitation source system for wireless power transmission is arranged in the housing.

[0083] The embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a controller, implements the single-source dual-frequency excitation source system control method for wireless power transmission as provided in the embodiment of the present application.

[0084] It should be noted that the above multiple embodiments can be combined and implemented. The execution order between the steps of each process of the method embodiment is only exemplary and does not constitute a limitation on the execution order between the steps. The steps can also be executed in other orders.

Claims

1. A single-source dual-frequency excitation source system for wireless power transmission, characterized in that: include: A dual-frequency excitation source module, a first wireless power transmission module, a second wireless power transmission module, a first switch, a second switch and a controller module; The first wireless power transmission module is connected in parallel with the first switch to form a first component, the second wireless power transmission module is connected in parallel with the second switch to form a second component, and the first component and the second component are connected in series; the dual-frequency excitation source module is at the front end of the system, and the rear end of the dual-frequency excitation source module is connected to the first component and the second component connected in series, and the controller module is used to control the dual-frequency excitation source module; The dual-frequency excitation source module is used to excite the first wireless power transmission module and the second wireless power transmission module respectively, or to excite the first wireless power transmission module and the second wireless power transmission module simultaneously; When the first switch is open and the second switch is closed, the dual-frequency excitation source module excites only the first wireless power transmission module; when the first switch is closed and the second switch is open, the dual-frequency excitation source module excites only the second wireless power transmission module; when both the first switch and the second switch are open, the dual-frequency excitation source module excites both the first wireless power transmission module and the second wireless power transmission module; the controller module controls the dual-frequency excitation source module by performing waveform superposition and combination on the resonant frequencies and magnitudes of the first wireless power transmission module and the second wireless power transmission module as signal waves input into the controller module; The dual-frequency excitation source module adopts a power electronic inverter topology; the signal wave of the dual-frequency excitation source module comes from the controller module, and the waveform of the signal wave includes a combined superposition of a first resonant frequency of the first wireless power transmission module and a second resonant frequency of the second wireless power transmission module.

2. The single-source dual-frequency excitation source system for wireless power transmission according to claim 1, characterized in that: The first wireless power transmission module and the second wireless power transmission module adopt a wireless power transmission circuit topology structure, and the power electronic inverter topology adopted by the dual-frequency excitation source module is a half-bridge inverter circuit or a full-bridge inverter circuit.

3. The single-source dual-frequency excitation source system for wireless power transmission according to claim 1 or 2, characterized in that: The first resonant frequency of the first wireless power transmission module is the same frequency or different frequency as the second resonant frequency of the second wireless power transmission module, the first resonant frequency of the first wireless power transmission module is fixed frequency or variable frequency, the second resonant frequency of the second wireless power transmission module is fixed frequency or variable frequency, the first wireless power transmission module and the second wireless power transmission module work simultaneously or at different times, and the first wireless power transmission module and the second wireless power transmission module respectively perform output amplitude control.

4. The single-source dual-frequency excitation source system for wireless power transmission according to claim 1 or 2, characterized in that: The first resonant frequency of the first wireless power transmission module or the second resonant frequency of the second wireless power transmission module is variable frequency, the controller module and the dual-frequency excitation source module have variable frequency excitation capabilities, and the system has dual variable frequency excitation capabilities.

5. The single-source dual-frequency excitation source system for wireless power transmission according to claim 1 or 2 is characterized in that: Also includes: A third wireless power transmission module and a third switch, wherein the third wireless power transmission module and the third switch are connected in parallel to form a third component, and the third component is connected in series with the first component and the second component; The dual-frequency excitation source module is used to excite the first wireless power transmission module, the second wireless power transmission module or the third wireless power transmission module respectively, or to excite the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module simultaneously; When the third switch is disconnected and the first switch and the second switch are closed, the dual-frequency excitation source module excites only the third wireless power transmission module; when the first switch, the second switch and the third switch are all disconnected, the dual-frequency excitation source module excites the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module at the same time; The controller module controls the dual-frequency excitation source module by superimposing and combining the resonant frequencies and sizes of the first wireless power transmission module, the second wireless power transmission module and the third wireless power transmission module as a signal wave input to the controller module; The waveform of the signal wave of the dual-frequency excitation source module includes a first resonant frequency of the first wireless power transmission module, a second resonant frequency of the second wireless power transmission module, and a third resonant frequency of the third wireless power transmission module.

6. The circuit according to claim 1 or 2, characterized in that: The first wireless power transmission module further includes: a first inductor and a first capacitor, the first inductor and the first capacitor are connected in series or in parallel, the inductance value of the first inductor is adjustable or the capacitance value of the first capacitor is adjustable; The second wireless power transmission module further includes: a second inductor and a second capacitor, the second inductor and the second capacitor are connected in series or in parallel, and the inductance value of the second inductor is adjustable or the capacitance value of the second capacitor is adjustable.

7. A control method for a single-source dual-frequency excitation source system for wireless power transmission, applied to the single-source dual-frequency excitation source system for wireless power transmission as claimed in any one of claims 1 to 6, characterized in that: The method comprises: The controller obtains a first resonant frequency and a first amplitude of a first signal of the first wireless power transmission module; The controller acquires a second resonant frequency and a second amplitude of a second signal of the second wireless power transmission module; The controller determines a third frequency and a third amplitude of an output signal of the excitation source according to the first resonant frequency, the first amplitude, the second resonant frequency and the second amplitude; The controller sends the third frequency and the third amplitude to the excitation source.

8. The method according to claim 7, characterized in that The controller determines a third frequency and a third amplitude of an output signal of an excitation source according to the first resonant frequency, the first amplitude, the second resonant frequency and the amplitude, comprising: The controller determines the third frequency according to the sum of the first resonant frequency and the second resonant frequency; The controller determines the third amplitude according to the sum of the first amplitude and the second amplitude.

9. An electronic device, characterized in that: It comprises the single-source dual-frequency excitation source system for wireless power transmission as described in any one of claims 1 to 6 and a shell, wherein the single-source dual-frequency excitation source system for wireless power transmission is arranged in the shell.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a controller, the method according to claim 7 or 8 is implemented.

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