Parameter set-based wireless power transfer system

Abstract

This invention provides a wireless power transfer system based on a parameter set, comprising: a Boost circuit module, an inverter circuit module, a resonant circuit module, a rectifier circuit module, and a multi-parameter set controller. The Boost circuit module is powered by an external solar array. The inverter circuit module is connected to the Boost circuit module and is used to invert DC power into AC power. The resonant circuit module is connected to both the inverter circuit module and the rectifier circuit module and is used to transmit AC power to the rectifier circuit module. The rectifier circuit module is used to rectify the AC power into DC power to supply the load. The multi-parameter set controller is connected to the external solar array, the Boost circuit module, the resonant circuit module, and the rectifier circuit module to control each module according to its parameters. Applying the technical solution of this invention can solve the technical problem of reduced reliability caused by contact wear in traditional contact slip ring power transfer mechanisms in wireless power transfer technology.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a wireless power transmission system based on a parameter set. Background Technology

[0002] Electromagnetic induction wireless power transfer technology enables contactless energy transfer between power sources and loads, offering advantages such as high efficiency, high reliability, and flexible application. Therefore, it has broad application prospects in situations where direct wire connections are impossible, such as rotating joints and confined spaces. However, with the deepening research into wireless power transfer and the increasing demand for it in various fields in recent years, conventional wireless power transfer control systems cannot yet meet the complex variations in input / output conditions. For example, when satellite power transfer technology is applied to satellites to replace existing SADA mechanisms, the input of the wireless power transfer system is a solar array, whose characteristics vary with illumination and temperature conditions. The output is connected to different satellite payloads, and its power varies with the satellite's operating conditions. Satellite power transfer involves complex variations in input / output conditions. Therefore, researching advanced control technologies for wireless power transfer is of great significance for its development and application, especially in the aerospace field, to solve technical problems that traditional methods cannot address. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] This invention provides a parameter-based wireless power transfer system, comprising: a Boost circuit module, an inverter circuit module, a resonant circuit module, a rectifier circuit module, and a multi-parameter set controller; the Boost circuit module is powered by an external solar array and is used to boost the output voltage of the solar array; the inverter circuit module is connected to the Boost circuit module and is used to invert DC power into AC power; the resonant circuit module is connected to both the inverter circuit module and the rectifier circuit module and is used to transmit AC power to the rectifier circuit module; the rectifier circuit module is used to rectify the AC power into DC power for supplying the load; the multi-parameter set controller is connected to the external solar array, the Boost circuit module, the resonant circuit module, and the rectifier circuit module to control each module according to the parameters of each module.

[0005] Furthermore, the Boost circuit module includes an inductor L1, a diode D1, and a MOSFET switch Sa. The inductor L1 and the MOSFET switch Sa are respectively connected to the solar cell array, and the diode D1 is connected to the inductor L1 and the MOSFET switch Sa.

[0006] Furthermore, the inverter circuit module is a full-bridge inverter circuit module, which includes four MOSFET switches S1, S2, S3 and S4. The multi-parameter set controller is connected to the four MOSFET switches S1, S2, S3 and S4 respectively to control the opening and closing of each MOSFET switch.

[0007] Furthermore, the resonant circuit module can be configured to include a primary resonant capacitor C1, a secondary resonant capacitor C2, and a loosely coupled transformer T1.

[0008] Furthermore, the rectifier circuit module includes a full-bridge rectifier circuit module, which includes diodes D2, D3, D4, and D5.

[0009] Furthermore, the rectifier circuit module also includes a capacitor Cf, which is connected in parallel with the full-bridge rectifier circuit module. The capacitor Cf is used for filtering and energy storage.

[0010] Furthermore, the inputs of the multi-parameter set controller are multiple parameters, including: the output current and output voltage of the solar cell array, the output current and output voltage of the Boost circuit module, the current of the loosely coupled transformer T1, and the output voltage of the wireless power transfer system.

[0011] Furthermore, the multi-parameter set controller adopts DSP control, including a front-end Boost circuit and a rear-end wireless power transmission circuit.

[0012] Furthermore, the front-end Boost circuit acquires the output voltage U of the solar cell array. sa and output current I sa The reference value U of the solar cell array output voltage is obtained through MPPT calculation. ref_sa Reference value U for the output voltage of the solar cell array ref_sa The given reference voltage used for the BoostMPPT loop is input to the non-inverting input of the BoostMPPT loop operational amplifier, and the output voltage U of the solar cell array is... sa The input is given to the inverting input of the Boost MPPT loop operational amplifier; the reference voltage U of the Boost constant voltage loop is... ref_Boost1 The input is given to the inverting input of the Boost constant-voltage loop operational amplifier, and the output voltage U of the Boost circuit module is... Boost The input is given to the non-inverting input of the Boost constant voltage loop operational amplifier; the switching between Boost MPPT loop and Boost constant voltage loop modes is achieved through competition between the MPPT loop and the constant voltage loop, with the larger value being used as the output; the output after the competition is compared with the given reference current I of the Boost constant voltage loop. ref_Boost The input is given to the inverting input terminal of the inner loop of the Boost current circuit, and the Boost circuit outputs current I. BoostThe input is given to the non-inverting input terminal of the Boost current inner loop, and the Boost current inner loop outputs the control strategy of the Boost circuit's duty cycle D and MOSFET switch Sa.

[0013] Furthermore, in the subsequent wireless power transfer circuit, the given reference voltage U of the WPT input constant voltage loop... ref_Boost2 The input voltage is fed to the non-inverting input of the WPT input voltage constant-voltage loop operational amplifier, and the sampled voltage U sam_Boost The input voltage is fed to the inverting input terminal of the WPT input voltage constant-voltage loop operational amplifier; the reference voltage U of the WPT output voltage constant-voltage loop is... ref_res The input voltage is fed to the inverting input of the WPT output voltage constant-voltage loop operational amplifier, and the output voltage U of the wireless power transfer system is... res The input is given to the non-inverting input of the WPT output voltage constant-voltage loop operational amplifier; the switching between the two modes of the WPT input voltage constant-voltage loop and the WPT output voltage constant-voltage loop is achieved through competition between the two loops, with the larger value being used as the output; the output after competition is compared with the given reference current I of the WPT output voltage constant-voltage loop. ref_res The current I of the loosely coupled transformer T1 is input to the non-inverting input terminal of the WPT inner current loop. res The input is fed to the inverting input terminal of the WPT current inner loop, and the WPT current inner loop outputs the phase shift angle θ of the inverter circuit and the control strategy of MOSFET switches S1, S2, S3 and S4.

[0014] This invention provides a parameter-set-based wireless power transfer system. This system connects to an external solar array, a Boost circuit module, a resonant circuit module, and a rectifier circuit module via a multi-parameter-set controller. The system effectively controls each module based on its parameters. This parameter-set-based control method achieves high-efficiency and high-stability energy transfer under varying light and temperature conditions of the solar array, while also meeting the output voltage stability requirements of the satellite payload under different operating conditions. Compared to existing technologies, this invention solves the technical problem of reduced reliability caused by contact wear in traditional contact slip ring power transfer mechanisms in wireless power transfer technology's SADA system. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the invention and, together with the textual description, explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1 A schematic diagram of a wireless power transfer system based on a parameter set according to a specific embodiment of the present invention is shown;

[0017] Figure 2 The control logic diagram of the front-end Boost circuit in the multi-parameter set controller provided according to a specific embodiment of the present invention is shown;

[0018] Figure 3 The control logic diagram of the downstream wireless power transmission circuit in a multi-parameter set controller provided according to a specific embodiment of the present invention is shown. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] like Figure 1 As shown, a parameter-based wireless power transfer system is provided according to a specific embodiment of the present invention. This system includes a Boost circuit module, an inverter circuit module, a resonant circuit module, a rectifier circuit module, and a multi-parameter set controller. The Boost circuit module is powered by an external solar array and is used to boost the output voltage of the solar array. The inverter circuit module is connected to the Boost circuit module and is used to invert DC power into AC power. The resonant circuit module is connected to both the inverter circuit module and the rectifier circuit module and is used to transmit AC power to the rectifier circuit module. The rectifier circuit module is used to rectify the AC power into DC power for supplying the load. The multi-parameter set controller is connected to the external solar array, the Boost circuit module, the resonant circuit module, and the rectifier circuit module to control each module according to its parameters.

[0023] This configuration provides a parameter set-based wireless power transfer system. This system connects to an external solar array, a boost circuit module, a resonant circuit module, and a rectifier circuit module via a multi-parameter set controller. The system effectively controls each module based on its parameters. This parameter set-based control method achieves high-efficiency and high-stability energy transfer under varying light and temperature conditions of the solar array, while also meeting the output voltage stability requirements of the satellite payload under different operating conditions. Compared to existing technologies, this invention solves the technical problem of reduced reliability caused by contact wear in traditional contact slip ring power transfer mechanisms in wireless power transfer technology's SADA system.

[0024] Furthermore, in this invention, the Boost circuit module includes an inductor L1, a diode D1, and a MOSFET switch Sa. Inductor L1 and MOSFET switch Sa are respectively connected to the solar cell array, and diode D1 is connected to both inductor L1 and MOSFET switch Sa. The Boost circuit module enables the solar cell array to perform voltage boosting, achieving maximum power point tracking (MPPT). By adjusting the duty cycle of the MOSFET switch Sa in the Boost circuit module, the output voltage of the Boost circuit module is controlled to meet the load requirements under different operating conditions, enabling the solar cell array to switch between maximum power output and constant voltage output.

[0025] Furthermore, in this invention, to achieve current inversion, the inverter circuit module can be configured as a full-bridge inverter circuit module. The full-bridge inverter circuit module includes four MOSFET switches S1, S2, S3, and S4. A multi-parameter set controller is connected to each of the four MOSFET switches S1, S2, S3, and S4 to control the switching on and off of each MOSFET switch. The full-bridge inverter circuit module inverts the DC output from the Boost circuit module into a high-frequency AC voltage, with a switching frequency typically greater than 100kHz.

[0026] Furthermore, in this invention, to achieve wireless power transfer, the resonant circuit module can be configured to include a primary-side resonant capacitor C1, a secondary-side resonant capacitor C2, and a loosely coupled transformer T1. The resonant circuit module enables contactless transmission of electromagnetic energy from the primary side to the secondary side. The primary-side resonant capacitor C1 and the secondary-side resonant capacitor C2 compensate for reactive power losses caused by excessive leakage inductance of the loosely coupled transformer T1, thereby achieving high-efficiency transmission from the primary side to the secondary side.

[0027] Furthermore, in this invention, in order to rectify the high-frequency AC power into DC power usable by the load, the rectifier circuit module can be configured to include a full-bridge rectifier circuit module, which includes diodes D2, D3, D4, and D5. The full-bridge rectifier circuit module realizes the conversion of the high-frequency AC energy output from the resonant network into DC output to power the load R.

[0028] In addition, the rectifier circuit module also includes a capacitor Cf, which is connected in parallel with the full-bridge rectifier circuit module. The capacitor Cf is used for filtering and energy storage.

[0029] Furthermore, in this invention, to achieve efficient control of each module by the multi-parameter set controller, the multi-parameter set controller can be configured to use DSP (Digital Signal Processor) control. The multi-parameter set controller receives multiple input parameters, including: the output current and voltage of the solar array, the output current and voltage of the Boost circuit module, the current of the loosely coupled transformer T1, and the output voltage of the wireless power transfer system. Based on the values ​​of its input parameters, the multi-parameter set controller adjusts the switching strategies, the duty cycle of the Boost circuit, and the phase shift angle of the inverter circuit in real time to control the system output voltage and the output voltage of the solar array, thereby achieving stable power supply to the load and maximum power point tracking (MPPT) of the solar array. The multi-parameter set controller allows the solar array to switch between constant voltage and maximum power modes to meet the power requirements of different loads.

[0030] The key feature of this invention is the multi-parameter set controller, which enables stable control of the wireless power transmission system, meets the voltage stability requirements of the load under different operating conditions, and smoothly switches between MPPT (maximum power point tracking) and constant voltage output modes according to the load power demand.

[0031] As a specific embodiment of the present invention, the multi-parameter set controller includes a front-end Boost circuit and a rear-end wireless power transfer circuit. The front-end Boost circuit is used to realize the mode switching between the Boost MPPT loop and the Boost constant voltage loop. The rear-end wireless power transfer circuit is used to realize the mode switching between the WPT input constant voltage loop and the WPT output constant voltage loop.

[0032] Among them, such as Figure 2 As shown, the front-end Boost circuit acquires the output voltage U of the solar cell array. sa and output current I sa The reference value U of the solar array output voltage is obtained through MPPT (Maximum Power Point Tracking) calculation. ref_sa Reference value U for the output voltage of the solar cell array ref_sa The given reference voltage used for the BoostMPPT loop is input to the non-inverting input of the BoostMPPT loop operational amplifier, and the output voltage U of the solar cell array is... sa The input is given to the inverting input of the Boost MPPT loop operational amplifier; the reference voltage U of the Boost constant voltage loop is... ref_Boost1 The input is given to the inverting input of the Boost constant-voltage loop operational amplifier, and the output voltage U of the Boost circuit module is... Boost The input is given to the non-inverting input of the Boost constant voltage loop operational amplifier; the switching between Boost MPPT loop and Boost constant voltage loop modes is achieved through competition between the MPPT loop and the constant voltage loop, with the larger value being used as the output; the output after the competition is compared with the given reference current I of the Boost constant voltage loop. ref_Boost The input is given to the inverting input terminal of the inner loop of the Boost current circuit, and the Boost circuit outputs current I. Boost The input is given to the non-inverting input terminal of the Boost current inner loop, and the Boost current inner loop outputs the control strategy of the Boost circuit's duty cycle D and MOSFET switch Sa.

[0033] like Figure 3 As shown, in the subsequent wireless power transfer (WPT) circuit, the reference voltage U of the WPT input constant voltage loop is... ref_Boost2 The input voltage is fed to the non-inverting input of the WPT constant voltage loop operational amplifier, and the output voltage U of the Boost circuit module is... BoostThe input voltage is fed to the inverting input terminal of the WPT input voltage constant-voltage loop operational amplifier; the reference voltage U of the WPT output voltage constant-voltage loop is... ref_res The input voltage is fed to the inverting input of the WPT output voltage constant-voltage loop operational amplifier, and the output voltage U of the wireless power transfer system is... res The input is given to the non-inverting input of the WPT output voltage constant-voltage loop operational amplifier; the switching between the two modes of the WPT input voltage constant-voltage loop and the WPT output voltage constant-voltage loop is achieved through competition between the two loops, with the larger value being used as the output; the output after competition is compared with the given reference current I of the WPT output voltage constant-voltage loop. ref_res The current I of the loosely coupled transformer T1 is input to the non-inverting input terminal of the WPT inner current loop. res The input is fed to the inverting input terminal of the WPT current inner loop, and the WPT current inner loop outputs the phase shift angle θ of the inverter circuit and the control strategy of MOSFET switches S1, S2, S3 and S4.

[0034] The parameter set-based wireless power transmission system of the present invention can realize wireless power transmission while enabling maximum power point tracking of the solar array. It can stabilize the load voltage under different power output conditions through a multi-parameter set controller, and achieve a smooth transition when the solar array output switches between maximum power and constant voltage output modes.

[0035] In summary, this invention provides a parameter-set-based wireless power transfer system. This system connects to an external solar array, a Boost circuit module, a resonant circuit module, and a rectifier circuit module via a multi-parameter-set controller. It then effectively controls each module based on its parameters. This parameter-set-based control method achieves high-efficiency and highly stable energy transfer under varying illumination and temperature conditions of the solar array, while simultaneously meeting the output voltage stability requirements of the satellite payload under different operating conditions. Compared to existing technologies, this invention solves the technical problem of reduced reliability caused by contact wear in traditional contact slip ring power transfer mechanisms in wireless power transfer technology's SADA system.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wireless power transfer system based on a parameter set, characterized in that, The parameter-based wireless power transfer system includes: a Boost circuit module, an inverter circuit module, a resonant circuit module, a rectifier circuit module, and a multi-parameter set controller. The Boost circuit module is powered by an external solar array and is used to boost the output voltage of the solar array. The inverter circuit module is connected to the Boost circuit module and is used to invert DC power into AC power. The resonant circuit module is connected to both the inverter circuit module and the rectifier circuit module and is used to transmit AC power to the rectifier circuit module. The rectifier circuit module is used to rectify the AC power into DC power to supply the load. The multi-parameter set controller is connected to the external solar array, the Boost circuit module, the resonant circuit module, and the rectifier circuit module to control each module according to its parameters. in, The multi-parameter set controller is controlled by DSP and includes a front-end Boost circuit and a rear-end wireless power transmission circuit. The front-end Boost circuit acquires the output voltage Usea and output current Isa of the solar cell array, and obtains the reference value Uref_sa of the solar cell array output voltage through MPPT calculation. The reference value Uref_sa of the solar cell array output voltage is used as the given reference voltage of the Boost MPPT loop and is input to the non-inverting input of the Boost MPPT loop operational amplifier. The output voltage Usea of ​​the solar cell array is input to the inverting input of the Boost MPPT loop operational amplifier. The given reference voltage Uref_Boost1 of the Boost constant voltage loop is input to the inverting input of the Boost constant voltage loop operational amplifier. The output voltage UBoost of the Boost circuit module is input to the non-inverting input of the Boost constant voltage loop operational amplifier. Through the competition between the MPPT loop and the constant voltage loop, the switching between the two modes of the Boost MPPT loop and the Boost constant voltage loop is realized. The competition logic takes the larger one as the output. The output after the competition and the given reference current Iref_Boost of the Boost constant voltage loop are input to the inverting input of the Boost current inner loop. The output current IBoost of the Boost circuit is input to the non-inverting input of the Boost current inner loop. The Boost current inner loop outputs the control strategy of the duty cycle D of the Boost circuit and the MOSFET switch Sa.

2. The wireless power transmission system based on parameter sets according to claim 1, characterized in that, The Boost circuit module includes an inductor L1, a diode D1, and a MOSFET switch Sa. The inductor L1 and the MOSFET switch Sa are respectively connected to the solar cell array, and the diode D1 is connected to the inductor L1 and the MOSFET switch Sa.

3. The wireless power transmission system based on parameter sets according to claim 1, characterized in that, The inverter circuit module is a full-bridge inverter circuit module, which includes four MOSFET switches S1, S2, S3 and S4. The multi-parameter set controller is connected to the four MOSFET switches S1, S2, S3 and S4 respectively to control the opening and closing of each MOSFET switch.

4. The wireless power transmission system based on parameter sets according to claim 1, characterized in that, The resonant circuit module can be configured to include a primary resonant capacitor C1, a secondary resonant capacitor C2, and a loosely coupled transformer T1.

5. The wireless power transmission system based on parameter sets according to claim 1, characterized in that, The rectifier circuit module includes a full-bridge rectifier circuit module, which includes diodes D2, D3, D4, and D5.

6. The wireless power transmission system based on parameter sets according to claim 5, characterized in that, The rectifier circuit module also includes a capacitor Cf, which is connected in parallel with the full-bridge rectifier circuit module. The capacitor Cf is used for filtering and energy storage.

7. The wireless power transfer system based on parameter sets according to claim 4, characterized in that, The inputs of the multi-parameter set controller are multiple parameters, including: the output current and output voltage of the solar cell array, the output current and output voltage of the Boost circuit module, the current of the loosely coupled transformer T1, and the output voltage of the wireless power transmission system.

8. The wireless power transmission system based on parameter sets according to claim 1, characterized in that, In the subsequent wireless power transfer circuit, the reference voltage U of the WPT input constant voltage loop is... ref_Boost2 The input voltage is fed to the non-inverting input of the WPT input voltage constant-voltage loop operational amplifier, and the sampled voltage U sam_Boost The input voltage is fed to the inverting input terminal of the WPT input voltage constant-voltage loop operational amplifier; the reference voltage U of the WPT output voltage constant-voltage loop is... ref_res The input voltage is fed to the inverting input of the WPT output voltage constant-voltage loop operational amplifier, and the output voltage U of the wireless power transfer system is... res The input is given to the non-inverting input of the WPT output voltage constant-voltage loop operational amplifier; the switching between the two modes of the WPT input voltage constant-voltage loop and the WPT output voltage constant-voltage loop is achieved through competition between the two loops, with the larger value being used as the output; the output after competition is compared with the given reference current I of the WPT output voltage constant-voltage loop. ref_res The current I of the loosely coupled transformer T1 is input to the non-inverting input terminal of the WPT inner current loop. res The input is given to the inverting input terminal of the WPT current inner loop, and the phase shift angle of the WPT current inner loop output inverter circuit is [value missing]. Control strategies for MOSFET switches S1, S2, S3 and S4.

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