Multifunctional circuit design method based on UUV-WPT system

Abstract

The invention provides a multifunctional circuit design method based on a UUV-WPT system. The method comprises the steps that a multifunctional circuit module composed of a control circuit and a main power circuit is designed; the connection relation of at least one capacitor, one inductor, one resistor and / or one field effect transistor power module in the main power circuit is processed. The full-bridge type high-frequency inverter circuit, the single-phase bridge type high-frequency rectifier circuit, the interleaved Boost type adjustable direct-current conversion circuit and the bridge type Buck type adjustable direct-current conversion circuit are used in the UUV wireless electric energy transmission system. The multifunctional circuit design method based on the UUV wireless electric energy transmission system has the advantages of being high in adaptability and universality, easy to debug, wide in application range and the like, the research and development period of the UUV wireless electric energy transmission system can be greatly shortened, and the research and development cost and the production cost can be relatively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless power transmission for underwater unmanned vehicles, and in particular relates to a multifunctional circuit design method based on a UUV-WPT system. Background Art

[0002] At present, in the field of wireless power transmission (WPT) of underwater unmanned vehicles (UUV), a wireless power transmission system based on magnetic coupling resonance is usually used. The system is generally composed of a high-frequency inverter circuit, a transmitter resonance compensation circuit, a transmitting coil, a receiving coil, a receiving compensation circuit, a high-frequency rectifier circuit, an adjustable DC conversion circuit, and other parts. The unit circuits involved are numerous and the design is complex, resulting in a relatively long R&D cycle and relatively high cost for the entire system. In addition, the application conditions of the UUV wireless power transmission system are complex, the operating voltage level is high, the operating voltage range is wide, and the physical space of the UUV is very limited. Relevant designers usually design multiple topological circuits according to requirements, which undoubtedly increases the R&D cost and R&D cycle. Therefore, it is very necessary to provide a multifunctional circuit design method that can be used for the UUV wireless power transmission system.

[0003] Therefore, how to provide a multifunctional circuit design method based on the UUV-WPT system has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional circuit design method based on a UUV-WPT system.

[0005] The present invention provides a multifunctional circuit design method based on a UUV-WPT system, comprising:

[0006] Step S1: designing a multifunctional circuit module consisting of a control circuit and a main power circuit;

[0007] Step S2: by processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect tube power module in the main power circuit, a full-bridge high-frequency inverter circuit, a single-phase bridge high-frequency rectifier circuit, an interleaved parallel Boost step-up adjustable DC conversion circuit and a bridge Buck step-down adjustable DC conversion circuit for use in the UUV wireless power transmission system are obtained respectively;

[0008] Among them, processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect transistor power module in the main power circuit includes: short-circuiting at least one capacitor, resistor, inductor or field effect transistor power module; and non-welding at least one resistor.

[0009] Optionally, the control circuit includes a power supply circuit, a DSP circuit connected to the power supply circuit, an isolation optocoupler circuit, a communication circuit, an isolation amplifier circuit, a signal processing circuit and an analog-to-digital conversion circuit;

[0010] The power supply circuit converts 24V instrument power into different voltages required by each circuit; the DSP circuit generates independent PWM signals, which are isolated by the isolation optocoupler circuit and sent to the drive circuit of the main power circuit respectively. At the same time, the fault signal fed back by the main power circuit is isolated by the isolation optocoupler circuit and sent to the DSP circuit; the voltage and current signals collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit, and the overvoltage and overcurrent signals are generated. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally the collected voltage and current signals are directly sent to the DSP circuit through the SPI bus; the communication signals of the DSP circuit are converted into CAN signals and 485 signals after being processed by the communication circuit to communicate with the host computer.

[0011] Optionally, the main power circuit is composed of a bridge topology circuit, a power conversion circuit, a drive circuit, a sampling circuit, a fuse, a plurality of capacitors, a plurality of resistors and a plurality of inductors;

[0012] Wherein, the bridge topology circuit is composed of two half-bridge field effect tube power modules;

[0013] The drive circuit includes a first drive circuit, a second drive circuit, a third drive circuit and a fourth drive circuit; the power conversion circuit is composed of three 24V to 24V isolated power supplies, the first isolated power supply realizes the conversion of 24V instrument power into a 24V power supply with 24V isolated output, which is used to directly power the third drive circuit and the fourth drive circuit, and provide energy to the second isolated power supply and the third isolated power supply at the same time, the isolated 24V power supply output by the second isolated power supply is used to power the first drive circuit, and the isolated 24V power supply output by the third isolated power supply is used to power the second drive circuit;

[0014] The sampling circuit includes a plurality of sampling resistors. A voltage sampling signal is obtained by voltage division of the sampling resistors, and a current sampling signal is obtained by current flowing through corresponding sampling resistors.

[0015] Optionally, the step S2 specifically includes:

[0016] Step S21: short-circuiting the resistor R3, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit and unwelding the capacitor C2, the resistor R6 and the resistor R7 to obtain a full-bridge high-frequency inverter circuit for the UUV wireless power transmission system.

[0017] Optionally, the step S2 specifically includes:

[0018] Step S22: short-circuiting the resistor R4, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit, and not welding the capacitor C2, the resistor R6 and the resistor R7, so as to obtain a high-frequency rectification circuit for the UUV wireless power transmission system;

[0019] Alternatively, by short-circuiting the resistor R4, the resistor R8, the inductor L1, the inductor L2 and the control ends of the two field effect tube power modules, and not welding the capacitor C2, the resistor R6 and the resistor R7, a high-frequency rectification circuit for the UUV wireless power transmission system is obtained.

[0020] Optionally, the step S2 specifically includes:

[0021] Step S23: short-circuiting the resistors R4 and R8 in the main power circuit and the control ends of the upper tubes of the two field effect tube power modules, and not welding the capacitor C2, the resistor R6 and the resistor R7, so as to obtain an interleaved parallel Boost type DC conversion circuit for the UUV wireless power transmission system.

[0022] Optionally, the step S2 specifically includes:

[0023] Step S24: short-circuiting the resistor R3, the resistor R4, the control end of the lower tube of the left half-bridge field effect tube power module, and the control end of the upper tube of the right half-bridge field effect tube power module in the main power circuit, and not welding the resistor R1 and the resistor R2, so as to obtain a bridge Buck step-down DC conversion circuit for the UUV wireless power transmission system.

[0024] Optionally, the field effect transistor power module is a silicon carbide metal oxide field effect transistor power module.

[0025] Optionally, the isolation amplifier used in the isolation amplifier circuit is of model AMC1311 or AMC1301; and the operational amplifier used in the signal processing circuit is of model LMV358.

[0026] Optionally, the driving circuit uses an integrated negative voltage bias driver IVCR1401.

[0027] The beneficial effects brought by the present invention are as follows:

[0028] It can be seen from the above scheme that the embodiment of the present invention provides a multifunctional circuit design method based on the UUV-WPT system, which has the following beneficial effects:

[0029] The present invention provides a multifunctional circuit design method based on a UUV wireless power transmission system. Through appropriate device selection and deformation, multiple functional modules such as a high-frequency inverter circuit, a high-frequency rectifier circuit, a boost-type adjustable DC conversion circuit, and a buck-type adjustable DC conversion circuit required in the UUV wireless power transmission system can be designed, which can better adapt to various complex application scenarios of the UUV wireless power transmission system; and the present invention adopts a modular design of a control circuit and a main power circuit, and designs the strong current of the power part and the weak current of the control part into independent circuit boards, which can better avoid mutual interference between the strong and weak currents; the control circuit and the main power circuit can be debugged and produced separately, reducing the difficulty of debugging and the cost of production; therefore, the multifunctional circuit design method based on the UUV wireless power transmission system of the present invention has the characteristics of strong adaptability, strong versatility, simple debugging, wide application range, etc., which can not only greatly reduce the research and development cycle of the UUV wireless power transmission system, but also relatively reduce the research and development cost and production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic flow chart of a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0031] Figure 2 It is a design block diagram of a multifunctional circuit module in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0032] Figure 3 It is a design block diagram of a high frequency inverter circuit in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0033] Figure 4 A design framework for a high-frequency rectifier circuit in a multifunctional circuit design method based on a UUV-WPT system provided in an embodiment Figure 1 ;

[0034] Figure 5 A design framework for a high-frequency rectifier circuit in a multifunctional circuit design method based on a UUV-WPT system provided in an embodiment Figure 2 ;

[0035] Figure 6 It is a design block diagram of an interleaved parallel Boost circuit in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0036] Figure 7 It is a design block diagram of a bridge Buck circuit in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0037] Figure 8 It is a schematic diagram of a driving circuit in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment;

[0038] Fig. 9 It is a schematic diagram of a sampling circuit in a multifunctional circuit design method based on a UUV-WPT system provided according to an embodiment. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 As shown, an embodiment of the present invention provides a multifunctional circuit design method based on a UUV-WPT system, comprising:

[0041] Step S1: designing a multifunctional circuit module consisting of a control circuit and a main power circuit;

[0042] Step S2: by processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect tube power module in the main power circuit, a full-bridge high-frequency inverter circuit, a single-phase bridge high-frequency rectifier circuit, an interleaved parallel Boost step-up adjustable DC conversion circuit and a bridge Buck step-down adjustable DC conversion circuit for use in the UUV wireless power transmission system are obtained respectively;

[0043] Among them, processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect transistor power module in the main power circuit includes: short-circuiting at least one capacitor, resistor, inductor or field effect transistor power module; and non-welding at least one resistor.

[0044] The multifunctional circuit design method based on the UUV wireless power transmission system of the embodiment of the present invention is implemented by a control circuit and a main power circuit topology structure, which can adapt to multiple unit modules in the UUV wireless power transmission system and various complex application scenarios of the UUV wireless power transmission system. Combined with the power, efficiency, frequency and other requirements in the UUV wireless power transmission system, the high-frequency inverter circuit usually adopts a full-bridge high-frequency inverter circuit; the high-frequency rectifier circuit usually adopts a single-phase bridge rectifier circuit; the adjustable DC conversion circuit generally has a boost type and a buck type, the boost type adjustable DC conversion circuit can adopt an interleaved parallel Boost circuit, and the buck type adjustable DC conversion circuit can adopt a bridge Buck circuit.

[0045] Alternatively, see Figure 2 As shown, in the multifunctional circuit design method based on the UUV wireless power transmission system according to the embodiment of the present invention, the control circuit includes a power supply circuit, a DSP circuit connected to the power supply circuit, an isolation optocoupler circuit, a communication circuit, an isolation amplifier circuit, a signal processing circuit, and an analog-to-digital conversion circuit;

[0046] The power supply circuit converts the 24V instrument power into different voltages required by each circuit; the DSP circuit generates independent PWM signals, which are isolated by the isolation optocoupler circuit and sent to the drive circuit of the main power circuit respectively. At the same time, the fault signal fed back by the main power circuit is isolated by the isolation optocoupler circuit and sent to the DSP circuit; the voltage and current signals collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit, and the overvoltage and overcurrent signals are generated. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally the collected voltage and current signals are directly sent to the DSP circuit through the SPI bus; the communication signals of the DSP circuit are converted into CAN signals and 485 signals after being processed by the communication circuit to communicate with the host computer.

[0047] Alternatively, see Figure 2 As shown, in the multifunctional circuit design method based on the UUV wireless power transmission system according to the embodiment of the present invention, the main power circuit consists of a bridge topology circuit, a power conversion circuit, a drive circuit, a sampling circuit, a fuse, a plurality of capacitors, a plurality of resistors and a plurality of inductors;

[0048] Among them, the bridge topology circuit is composed of two half-bridge field effect tube power modules; the drive circuit includes a first drive circuit, a second drive circuit, a third drive circuit and a fourth drive circuit; the power conversion circuit is composed of three 24V to 24V isolated power supplies, the first isolated power supply converts the 24V instrument power into a 24V power supply with a 24V isolated output, which is used to directly power the third drive circuit and the fourth drive circuit, and provide energy to the second isolated power supply and the third isolated power supply at the same time. The isolated 24V power supply output by the second isolated power supply is used to power the first drive circuit, and the isolated 24V power supply output by the third isolated power supply is used to power the second drive circuit; the sampling circuit includes multiple sampling resistors, and a voltage sampling signal is obtained by dividing the sampling resistors, and the current flows through the corresponding sampling resistors to obtain a current sampling signal.

[0049] The high-frequency inverter, high-frequency rectifier and adjustable DC conversion circuit in the UUV wireless power transmission system are all implemented using a control circuit and a main power circuit topology. The control circuit uses a high-performance DSP as the main control, and the main power circuit uses two half-bridge field effect transistor power modules as power devices. The control circuit and the main power circuit are designed as two circuit boards of the same size. The design block diagram is shown in the figure. Figure 2As shown, some circuits in the figure are optional circuits, which can be selected according to actual functional requirements. The optional methods are short-circuiting, non-welding of devices, etc. The control circuit is composed of DSP circuit, power supply circuit, isolation optocoupler circuit, communication circuit, isolation amplifier circuit, signal processing circuit, and analog-to-digital conversion circuit. The working principle of the control circuit is: the power supply circuit converts the 24V instrument power into different voltages required by each unit circuit; the DSP circuit generates independent PWM signals, which are isolated by the isolation optocoupler circuit and sent to the drive circuit of the main power circuit respectively. At the same time, the fault signal fed back by the main power circuit is isolated by the isolation optocoupler circuit and sent to the DSP circuit; the voltage and current signals collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit, and the overvoltage and overcurrent signals are generated. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally the data is exchanged with the DSP through the SPI bus. The generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signal of the DSP is converted into CAN signal and 485 signal after being processed by the communication circuit to communicate with the host computer. The main power circuit is composed of a bridge topology circuit, a power conversion circuit, a drive circuit, a sampling circuit, a fuse, a capacitor, an inductor, etc. The bridge topology circuit is composed of two half-bridge field effect tube power modules; the power circuit is composed of three 24V to 24V isolated power modules, wherein the first isolated power supply (24V to 24V isolated power supply 1) realizes the conversion of 24V instrument power into a 24V power supply with an isolated output of 24V, which is used to directly power the third drive circuit (drive circuit 3) and the fourth drive circuit (drive circuit 4), and at the same time provides energy to the second isolated power supply (24V to 24V isolated power supply 2) and the third isolated power supply (24V to 24V isolated power supply 3); the isolated 24V power supply output by the second isolated power supply is used to power the first drive circuit (drive circuit 1); the isolated 24V power supply output by the third isolated power supply is used to power the third drive circuit; the four drive circuits are relatively independent; the sampling circuit is composed of multiple sampling devices, and the corresponding sampling is selected according to different functions.

[0050] For example, for modules such as high-frequency inverter circuit, high-frequency rectifier circuit, and adjustable DC conversion circuit, the common control circuit for all three is composed of DSP circuit, power supply circuit, isolation optocoupler circuit, communication circuit, isolation amplifier circuit, signal processing circuit, and analog-to-digital conversion circuit. The core controller DSP uses TMS320F28335 from Texas Instruments, the optocoupler used for PWM output isolation uses TLP2766 from Toshiba, the optocoupler used for fault signal input isolation uses PC817 from Shenzhen Huaxuanyang Electronics Co., Ltd., the CAN communication chip uses ISO1050 from Texas Instruments, the 485 communication chip uses CA-IS3082 from Shanghai Chuantu Microelectronics Co., Ltd., the isolation amplifier used for voltage sampling uses AMC1311 from Texas Instruments, the isolation amplifier used for current sampling uses AMC1301 from Texas Instruments, the operational amplifier used for signal processing circuit uses LMV358 from Texas Instruments, and the analog-to-digital conversion chip used in the analog-to-digital conversion circuit uses ADS8354 ​​from Texas Instruments.

[0051] Optionally, step S2 in the multifunctional circuit design method based on the UUV wireless power transmission system of an embodiment of the present invention specifically includes: step S21: short-circuiting the resistor R3, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit, and not welding the capacitor C2, the resistor R6 and the resistor R7 to obtain a full-bridge high-frequency inverter circuit for the UUV wireless power transmission system.

[0052] Specifically, through certain device selection and deformation, Figure 3 The circuit structure shown can realize the high-frequency inverter circuit function in the UUV wireless power transmission system. The specific operation method is: short-circuit the resistor R3, short-circuit the inductor L1 and the inductor L2, do not weld the capacitor C2, the resistor R6, and the resistor R7, and short-circuit the resistor R8. The design block diagram of the deformed high-frequency inverter circuit is as follows: Figure 3As shown. The working principle of the high-frequency inverter circuit is as follows: the high-voltage direct current provided by the UUV mother ship at the transmitting end of the UUV wireless power transmission system is input into the main power circuit of the high-frequency inverter circuit through terminals P1 and P2, and first passes through the fuse F1 to achieve severe input overcurrent protection; then it is filtered by capacitor C1; the input voltage is applied to resistors R1 and R2, and the input voltage can be calculated by collecting the voltage across R2 according to the voltage division ratio; the input current flows through resistor R4, and the input current can be calculated according to I=U / R by collecting the voltage across R4; then the four PWM signals (PWM11, PWM22, PWM33, PWM44) generated by the control circuit are passed through four independent drive circuits (drive circuit 1, drive circuit 2, drive circuit 3, drive circuit 4), and the conduction of the two half-bridge field effect tube power modules is controlled, so that high-frequency alternating current can be obtained between the output terminals DESAT3 and DESAT4 of the half-bridge structure; then severe output overcurrent protection is achieved through fuse F2; finally, high-frequency alternating current is output from terminals P3 and P4. The control circuit converts the 24V instrument power into different voltages required by each unit circuit by the power supply circuit; the DSP circuit generates independent PWM signals (PWM1, PWM2, PWM3, PWM4), which are isolated by the isolation optocoupler circuit to generate isolated PWM signals (PWM11, PWM22, PWM33, PWM44), which are sent to the drive circuit of the main power circuit respectively. At the same time, the fault signals (fault signal 1, fault signal 2, fault signal 3, fault signal 4) fed back by the main power circuit are isolated by the isolation optocoupler circuit to generate isolated fault signals (FO1, FO2, FO3, FO4) is sent to the DSP circuit; the voltage (V_Sam1) and current signals (I_Sam1) collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit, and the overvoltage (OV) and overcurrent signals (OC) are generated. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally the data is exchanged with the DSP through the SPI bus, and the generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signals of the DSP are converted into CAN signals and 485 signals after being processed by the communication circuit to communicate with the host computer.

[0053] For example, Figure 3 The figure shows the design block diagram of the high-frequency inverter circuit through certain device selection and deformation, in which the 24V to 24V isolated power supply 1 uses the URB2424YMD power module of Guangzhou Jinshengyang Technology Co., Ltd.; the 24V to 24V isolated power supply 2 and the 24V to 24V isolated power supply 3 both use the H2424S power module of Guangzhou Jinshengyang Technology Co., Ltd.; the capacitor C1 uses the C3D3L405 metallized polypropylene film high-voltage capacitor of Xiamen Farad; the drive circuit uses Figure 7In the circuit shown, the core driver chip is the IVCR1401 integrated negative voltage bias driver of Shanghai Zhanxin Electronic Technology Co., Ltd.; the half-bridge silicon carbide metal oxide field effect tube power module is the IV1B12013HA1L power module of Shanghai Zhanxin Electronic Technology Co., Ltd.; assuming that the input voltage of the high-frequency inverter circuit is a 600V DC voltage, the DC voltage is converted into a high-frequency AC power after passing through a full-bridge voltage-type inverter circuit composed of two half-bridge silicon carbide metal oxide field effect tube power modules VTL, VTR and capacitor C1. The half-bridge silicon carbide metal oxide field effect tube power module is controlled to be turned on and off by the isolated PWM signal generated by the control circuit after passing through the drive circuit.

[0054] Optionally, step S2 in the multifunctional circuit design method based on the UUV wireless power transmission system of the embodiment of the present invention specifically includes: step S22: by short-circuiting the resistor R4, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit, and not welding the capacitor C2, the resistor R6 and the resistor R7, to obtain a high-frequency rectification circuit used in the UUV wireless power transmission system; or, by short-circuiting the resistor R4, the resistor R8, the inductor L1, the inductor L2 and the control ends of the two field effect tube power modules, and not welding the capacitor C2, the resistor R6 and the resistor R7, to obtain a high-frequency rectification circuit used in the UUV wireless power transmission system.

[0055] Specifically, since a fast recovery body diode VDsd is integrated inside the field effect tube, through certain device selection and deformation, Figure 1 The circuit structure shown can realize the high-frequency rectification circuit function in the UUV wireless power transmission system. There are two operation methods. Operation method 1 is: short-circuit resistor R4, short-circuit inductor L1 and inductor L2, do not weld capacitor C2, resistor R6, and resistor R7, and short-circuit resistor R8. The design block diagram of the deformed high-frequency rectification circuit is as follows: Figure 4 The second operation method is: short-circuit the resistor R4, short-circuit the inductor L1 and the inductor L2, do not weld the capacitor C2, the resistor R6, and the resistor R7, short-circuit the resistor R8, and short-circuit the control end (gate-source) of the field effect tube. The design block diagram of the deformed high-frequency rectifier circuit is as follows: Figure 5As shown. The working principle of the high-frequency inverter circuit is as follows: the high-frequency alternating current after receiving coil and receiving compensation at the receiving end of the UUV wireless power transmission system is input into the high-frequency rectifier circuit from terminals P3 and P4, and severe input overcurrent protection is achieved through fuse F2; after passing through the rectifier bridge composed of two half-bridge field effect tube power modules, a rippled direct current is obtained, and then a smooth direct current is obtained after filtering by capacitor C1, and severe output overcurrent protection is achieved through fuse F1, and finally output from terminals P1 and P2; the output voltage is applied to resistors R1 and R2, and the output voltage can be calculated by collecting the voltage across R2 and then according to the voltage division ratio; the output current flows through resistor R3, and the output current can be calculated according to I=U / R by collecting the voltage across R3; if the operation method 1 is executed, the control circuit converts the 24V instrument power into different voltages required by each unit circuit by the power supply circuit; the DSP circuit generates low-level PWM signals (PWM11=PWM 22=PWM33=PWM44=0), which are sent to the driving circuit of the main power circuit respectively to turn off the four field effect tubes, and the body diodes inside the field effect tubes are turned on to work. At the same time, the fault signals (fault signal 1, fault signal 2, fault signal 3, fault signal 4) fed back by the main power circuit are isolated by the isolation optocoupler circuit to generate isolated fault signals (FO1, FO2, FO3, FO4) and sent to the DSP; the voltage (V_Sam1) and current signals (I_Sam) collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit to generate overvoltage (OV) and overcurrent (OC) signals. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally data is exchanged with the DSP through the SPI bus, and the generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signals of the DSP are converted into CAN signals and 485 signals after being processed by the communication circuit to communicate with the host computer. If the second operation method is followed, the control circuit converts the 24V instrument power into different voltages required by each unit circuit by the power supply circuit; the DSP circuit does not need to generate a control signal, and the four field effect tubes are all closed at this time, and the body diode inside the field effect tube is turned on to work; the voltage (V_Sam1) and current signal (I_Sam) collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit to generate overvoltage (OV) and overcurrent signals (OC). The processed signal is sent to the analog-to-digital conversion circuit to be converted into a digital signal, and finally the data is exchanged with the DSP through the SPI bus, and the generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signal of the DSP is converted into CAN signal and 485 signal after being processed by the communication circuit to communicate with the host computer. The two operation methods have their own advantages and disadvantages, and can be selected according to actual needs.

[0056] For example, Figure 4 The figure shows a design block diagram of a high-frequency rectifier circuit with certain device selection and deformation. The 24V to 24V isolated power supply 1 uses the URB2424YMD power module of Guangzhou Jinshengyang Technology Co., Ltd.; the 24V to 24V isolated power supply 2 and the 24V to 24V isolated power supply 3 both use the H2424S power module of Guangzhou Jinshengyang Technology Co., Ltd.; the capacitor C1 uses the C3D3L405 metallized polypropylene film high-voltage capacitor of Xiamen Farad; the drive circuit uses Figure 7 In the circuit shown, the core driver chip is the IVCR1401 integrated negative voltage bias driver of Shanghai Zhanxin Electronic Technology Co., Ltd.; the half-bridge silicon carbide metal oxide field effect tube power module is the IV1B12013HA1L power module of Shanghai Zhanxin Electronic Technology Co., Ltd.; assuming that the input voltage of the high-frequency rectification circuit is 700V AC voltage, the AC voltage is converted into high-voltage DC after passing through the bridge rectification circuit composed of two half-bridge silicon carbide metal oxide field effect tube power modules VTL, VTR and capacitor C1. The half-bridge silicon carbide metal oxide field effect tube power module generates four low-level signals from the control circuit, which control the field effect tube to be turned off after passing through the drive circuit, and the body diode inside the field effect tube is turned on to realize rectification.

[0057] Figure 5 The figure shows a design block diagram of a high-frequency rectifier circuit 2 through certain device selection and deformation, wherein capacitor C1 uses Xiamen Farah's C3D3L405 metallized polypropylene film high-voltage capacitor; the half-bridge silicon carbide metal oxide field effect tube power module uses Shanghai Zhanxin Electronic Technology Co., Ltd.'s IV1B12013HA1L power module; assuming that the input voltage of the high-frequency rectifier circuit is 700V AC voltage, the AC voltage is converted into high-voltage DC after passing through a bridge rectifier circuit composed of two half-bridge silicon carbide metal oxide field effect tube power modules VTL, VTR and capacitor C1. The field effect tube in the half-bridge silicon carbide metal oxide field effect tube power module is always in the off state, and rectification is achieved by turning on the body diode inside the field effect tube.

[0058] Due to the different application scenarios of the UUV wireless power transmission system, different ratios of transceiver coils, different resonance compensation circuit parameters and different UUV battery voltage levels, the DC power after high-frequency rectification may be less than the charging voltage required by the UUV battery, or may be greater than the charging voltage required by the UUV battery, and the charging voltage and current of the UUV battery need to be adjusted in real time. Therefore, it is necessary to add an adjustable DC conversion circuit between the high-frequency rectification output and the UUV battery. However, whether the adjustable DC conversion design is a step-up or step-down type needs to be determined according to specific needs. The present invention is based on Figure 1 The circuit design block diagram shown provides design methods for two circuits: a boost type adjustable DC conversion circuit and a buck type adjustable DC conversion circuit.

[0059] Optionally, step S2 in the multifunctional circuit design method based on the UUV wireless power transmission system in an embodiment of the present invention specifically includes: step S23: short-circuiting the resistors R4, R8 and the control ends of the upper tubes of the two field effect transistor power modules in the main power circuit, and not welding the capacitor C2, the resistor R6 and the resistor R7, so as to obtain an interleaved parallel Boost type DC conversion circuit for the UUV wireless power transmission system.

[0060] Specifically, since a fast recovery body diode VDsd is integrated inside the field effect tube, through certain device selection and deformation, Figure 1 The circuit structure shown can realize the boost type DC conversion circuit function in the UUV wireless power transmission system, and its core circuit is the staggered parallel Boost circuit. The specific operation method is: do not weld the capacitor C2, resistor R6, and resistor R7, short-circuit the resistor R8, short-circuit the resistor R4, and short-circuit the control ends (gate-source) of the upper tubes of the two half-bridge silicon carbide metal oxide field effect tube power modules. The design block diagram of the deformed boost type DC conversion circuit is shown in the figure below. Figure 6As shown. The working principle of the boost type DC conversion circuit is as follows: the high voltage DC power rectified by the high frequency rectification circuit at the receiving end of the UUV wireless power transmission system is input from the terminal P3, the terminal P4 and the terminal P5, firstly passes through the fuse F2 to achieve severe input overcurrent protection, and then passes through the staggered parallel Boost circuit composed of two half-bridge silicon carbide metal oxide field effect tube power modules, inductors L1 and L2 and capacitors C1; the control circuit generates two PWM signals (PWM33, PWM44) through two independent drive circuits (drive After the circuit 3 and the driving circuit 4), the conduction of the lower tubes of the two half-bridge silicon carbide metal oxide field effect tube power modules is controlled, and then the serious output overcurrent protection is realized through the fuse F1, and finally the high voltage direct current not less than the input is output at the terminal P1 and the terminal P2; the output voltage is applied to the resistor R1 and the resistor R2, and the output voltage can be calculated according to the voltage division ratio by collecting the voltage across the two ends of R2; the output current flows through the resistor R3, and the output current can be calculated according to I=U / R by collecting the voltage across the two ends of the resistor R3; the control circuit The routing power supply circuit converts the 24V instrument power into different voltages required by each unit circuit; the DSP circuit generates independent PWM signals (PWM3, PWM4), which are isolated by the isolation optocoupler circuit to generate isolated PWM signals (PWM33, PWM44), which are sent to the drive circuit of the main power circuit respectively. At the same time, the fault signal (fault signal 3, fault signal 4) fed back by the main power circuit is isolated by the isolation optocoupler circuit to generate isolated fault signals (FO3, FO4) and sent to the DSP; the voltage (V_Sam1) and current signal (I_Sam) collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit to generate overvoltage (OV) and overcurrent (OC) signals. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally data is exchanged with the DSP through the SPI bus, and the generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signal of the DSP is converted into CAN signal and 485 signal after being processed by the communication circuit to communicate with the host computer.

[0061] For example, Figure 6 The figure shows the design block diagram of the staggered parallel Boost type adjustable DC conversion circuit through certain device selection and deformation, in which the 24V to 24V isolated power supply 1 uses the URB2424YMD power module of Guangzhou Jinshengyang Technology Co., Ltd.; the capacitor C1 uses the C3D3L405 metallized polypropylene film high-voltage capacitor of Xiamen Farad; the drive circuit uses Figure 7In the circuit shown, the core driver chip uses the IVCR1401 integrated negative bias driver of Shanghai Zhanxin Electronic Technology Co., Ltd.; the half-bridge silicon carbide metal oxide field effect tube power module uses the IV1B12013HA1L power module of Shanghai Zhanxin Electronic Technology Co., Ltd.; the inductor uses the PQ3220 skeleton and PC95 magnetic core of TDK for winding. Assuming that the output voltage of the high-frequency rectifier circuit is 300V DC voltage, the DC voltage is converted into a DC voltage greater than 300V to charge the UUV battery after passing through the staggered parallel Boost circuit composed of inductor L1, inductor L2, two half-bridge silicon carbide metal oxide field effect tube power modules VTL, VTR, and capacitor C1. The upper tubes of the two half-bridge silicon carbide metal oxide field effect tube power modules are always in the off state, and the lower tube is controlled to be turned on and off by the isolated PWM signal generated by the control circuit after passing through the drive circuit.

[0062] Optionally, step S2 in the multifunctional circuit design method based on the UUV wireless power transmission system in an embodiment of the present invention specifically includes: step S24: short-circuiting the resistor R3, the resistor R4, the control end of the lower tube of the left half-bridge field effect tube power module, and the control end of the upper tube of the right half-bridge field effect tube power module in the main power circuit, and not welding the resistor R1 and the resistor R2 to obtain a bridge-type Buck step-down DC conversion circuit for the UUV wireless power transmission system.

[0063] Specifically, since a fast recovery body diode VDsd is integrated inside the field effect tube, through certain device selection and deformation, Figure 1 The circuit structure shown can realize the buck type DC conversion circuit function in the UUV wireless power transmission system, and its core circuit is a bridge Buck circuit. The specific operation method is: do not weld the resistor R1 and the resistor R2, short the resistor R3 and the resistor R4, short the control end (gate-source) of the lower tube of the left half-bridge silicon carbide metal oxide field effect tube power module and the control end (gate-source) of the upper tube of the right half-bridge silicon carbide metal oxide field effect tube power module. The design block diagram of the deformed buck type DC conversion circuit is as follows: Figure 7As shown. The working principle of the step-down DC conversion circuit is as follows: the high-voltage DC power rectified by the high-frequency rectification circuit at the receiving end of the UUV wireless power transmission system is input from terminals P1 and P2, first passing through fuse F1 to achieve severe input overcurrent protection; then passing through a bridge Buck circuit composed of two half-bridge silicon carbide metal oxide field effect tube power modules, inductors L1 and L2, and capacitors C2; the control circuit generates two PWM signals (PWM11, PWM44) and then passes through two independent drive circuits (drive circuit 1, drive circuit 4). , control the conduction of the lower tube of the left half-bridge silicon carbide metal oxide field effect tube power module and the upper tube of the right half-bridge silicon carbide metal oxide field effect tube power module, and then achieve severe output overcurrent protection through the fuse F1, and finally output a high-voltage direct current less than the input at the terminal P2 and the terminal P3; the output voltage is applied to the resistor R6 and the resistor R7, and the output voltage can be calculated by collecting the voltage across R7 and then according to the voltage division ratio; the output current flows through the resistor R8, and the output current can be calculated by collecting the voltage across the resistor R8 according to I=U / R Current; the control circuit converts the 24V instrument power into different voltages required by each unit circuit by the power supply circuit; the DSP circuit generates independent PWM signals (PWM1, PWM4), which are isolated by the isolation optocoupler circuit to generate isolated PWM signals (PWM11, PWM44), which are sent to the drive circuit of the main power circuit respectively. At the same time, the fault signal (fault signal 1, fault signal 4) fed back by the main power circuit is isolated by the isolation optocoupler circuit to generate isolated fault signals (FO1, FO4) and sent to the DSP; the voltage (V_Sam2) and current signal (I_Sam2) collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit to generate overvoltage (OV) and overcurrent (OC) signals. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally data is exchanged with the DSP through the SPI bus, and the generated overvoltage OV and overcurrent OC signals are directly sent to the DSP; the communication signal of the DSP is converted into CAN signal and 485 signal after being processed by the communication circuit to communicate with the host computer.

[0064] For example, Figure 7 The figure shows the design block diagram of the bridge-type Buck step-down adjustable DC conversion circuit through certain device selection and deformation, in which the 24V to 24V isolated power supply 1 uses the URB2424YMD power module of Guangzhou Jinshengyang Technology Co., Ltd.; the 24V to 24V isolated power supply 2 uses the H2424S power module of Guangzhou Jinshengyang Technology Co., Ltd.; capacitors C1 and C2 are both C3D3L405 metallized polypropylene film high-voltage capacitors from Xiamen Farad; the drive circuit uses Figure 7In the circuit shown, the core driver chip uses the IVCR1401 integrated negative bias driver of Shanghai Zhanxin Electronic Technology Co., Ltd.; the half-bridge silicon carbide metal oxide field effect tube power module uses the IV1B12013HA1L power module of Shanghai Zhanxin Electronic Technology Co., Ltd.; the inductor uses the GU30 skeleton and PC95 magnetic core of TDK for winding. Assuming that the output voltage of the high-frequency rectifier circuit is 600V DC voltage, the DC voltage is converted into a DC voltage less than 600V to charge the UUV battery after passing through the bridge Buck circuit composed of inductor L1, inductor L2, capacitor C2, two half-bridge silicon carbide metal oxide field effect tube power modules VTL, VTR, and capacitor C1. The lower tube of the left half-bridge silicon carbide metal oxide field effect tube power module is always in the off state, and the upper tube is controlled to be turned on and off by the isolated PWM signal generated by the control circuit after passing through the drive circuit. The upper tube of the right half-bridge silicon carbide metal oxide field effect tube power module is always in the off state, and the lower tube is controlled to be turned on and off by the isolated PWM signal generated by the control circuit after passing through the drive circuit.

[0065] Preferably, the field effect transistor power module in the multifunctional circuit design method based on the UUV wireless power transmission system in the embodiment of the present invention is a silicon carbide metal oxide field effect transistor power module.

[0066] Optionally, the isolation amplifier model used in the isolation amplifier circuit in the multifunctional circuit design method based on the UUV wireless power transmission system in the embodiment of the present invention is AMC1311 or AMC1301; the operational amplifier model used in the signal processing circuit is LMV358.

[0067] Optionally, the driving circuit uses an integrated negative voltage bias driver IVCR1401.

[0068] Specifically, the driving circuit in this embodiment adopts the integrated negative voltage bias driver IVCR1401 of Shanghai Zhanxin Electronic Technology Co., Ltd., and the circuit diagram is as shown in FIG. Figure 8As shown, the main reasons for selecting the IVCR1401 driver are: the driver is a single-channel driver, has a wide power supply range, an internally integrated negative voltage bias, and provides a 5V power supply output; the single-channel driver allows the four field effect transistors in this solution to be driven and controlled independently, the wide power supply range makes the design of the drive power supply more flexible and simple, the internally integrated negative voltage bias can accelerate the shutdown of the field effect transistor, and is conducive to the application of high-frequency switching field effect transistors, and provides a 5V power supply output that can be directly used to power the isolation optocoupler. Since the lower tube driving power supplies of the two half-bridge silicon carbide metal oxide field effect tube power modules in the bridge circuit share a common ground, the lower tubes of the two half-bridge silicon carbide metal oxide field effect tube power modules use the same power supply (VDD_24V1 / GND_24V1); the upper tubes of the two half-bridge silicon carbide metal oxide field effect tube power modules independently use two isolated power supplies (VDD_24V2 / GND_24V2 and VDD_24V3 / GND_24V3). The working principle of the drive circuit is: converting the PWM signal generated by the control circuit into a PWM signal with a negative voltage bias, and then controlling the opening and closing of the field effect tube, while feeding back the drive fault, and providing a 5V power output for powering the isolated optocoupler of the drive signal and the fault signal.

[0069] For example, in this embodiment, the voltage and current sampling is composed of a sampling circuit, an isolation amplifier circuit, a signal processing circuit and an analog-to-digital conversion circuit, wherein the sampling circuit adopts a resistor voltage divider to sample voltage and a sampling resistor to sample current; the isolation amplifier circuit adopts an isolation amplifier of TI Company of the United States, AMC1311 is selected for voltage sampling, and AMC1301 is selected for current sampling. The isolation amplifier isolates and amplifies the voltage and current sampling signals on the main power circuit; the operational amplifier used in the signal processing circuit adopts LMV358 of TI Company of the United States, and the isolation amplifier circuit and the signal processing circuit are as follows Fig. 9As shown in the figure, the working principle of voltage and current sampling is as follows: the voltage sampling signal is obtained by resistor voltage division in the main power circuit, and the current sampling signal is obtained by current flowing through the sampling resistor, and then sent to the input end of the isolation amplifier. The input end of the isolation amplifier is powered by an isolated power supply (5V_ISO / GND_ISO). After isolation and amplification by the isolation amplifier, the differential signal is output, and the differential signal is sent to the addition and subtraction operation circuit composed of the operational amplifier to obtain a single-ended positive voltage signal. The single-ended positive voltage signal is divided by resistors to obtain a voltage detection signal (V_ADC) and a current monitoring signal (I_ADC) and sent to the input end of the analog-to-digital converter, and sent to the comparison circuit composed of the operational amplifier to obtain a hardware overvoltage signal (OV) and a hardware overcurrent signal (OC). The ratio of the addition and subtraction operation circuit, the resistor voltage division ratio, the overvoltage protection value, and the overcurrent protection value can all be set through hardware parameters. The isolation gain GV1 in the voltage sampling circuit is 1, the ratio of addition and subtraction operations GV2 is RS204 / RS203, the resistor voltage division ratio GV3 is RS206 / (RS205+RS206), and the overall ratio GV of the voltage sampling circuit is GV1*GV2*GV3=(RS204 / RS203)*[RS206 / (RS205+RS206)]. The isolation gain GI1 in the current sampling circuit is 8.2, the ratio of addition and subtraction operations GI2 is RS404 / RS403, the resistor voltage division ratio GI3 is RS406 / (RS405+RS406), and the overall ratio GI of the current sampling circuit is GI1*GI2*GI3=8.2*(RS404 / RS403)*[RS406 / (RS405+RS406)].

[0070] Fig. 9The signal isolation amplification and signal processing circuit for voltage sampling and current sampling is shown, and the circuit can be used for high-frequency inverter circuit, high-frequency rectifier circuit, boost type DC conversion circuit and buck type DC conversion circuit. (1) If used in a high-frequency inverter circuit, the circuit is used to process input voltage and input current sampling signals; assuming that the input voltage is 800V, R1 uses a high-precision resistor with a resistance of 399kΩ, and R2 uses a high-precision resistor with a resistance of 1kΩ, that is, the voltage sampling is V_Sam1=800V / 400kΩ*1kΩ=2V; RS203 uses a high-precision resistor with a resistance of 1kΩ, RS204 uses a high-precision resistor with a resistance of 2kΩ, RS205 uses a high-precision resistor with a resistance of 2kΩ, and RS206 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the voltage sampling isolation amplification and signal processing circuit, GV=(RS204 / RS203)*[RS206 / (RS205+RS206)]=1.2, that is, the analog input voltage of the voltage acquisition is 2.4V. Assuming that the hardware overvoltage protection value is 880V, the analog input voltage of the hardware overvoltage protection comparator is (880 / 400)*(RS204 / RS203)=4.4V, that is, the comparison point voltage of the hardware overvoltage protection is 4.4V, and then the resistance values ​​of resistors RS208 and RS209 can be selected according to [5V / (RS208+RS209)]*RS209=4.4V. Assuming the input current is 10A, R4 uses a high-precision shunt with a resistance of 10mΩ, that is, the current sampling is I_Sam1=10A*10mΩ=0.1V; RS403 uses a high-precision resistor with a resistance of 2kΩ, RS404 uses a high-precision resistor with a resistance of 10kΩ, RS405 uses a high-precision resistor with a resistance of 2kΩ, and RS406 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the current sampling isolation amplification and signal processing circuit, GI=8.2*(RS404 / RS403)*[RS406 / (RS405+RS406)]=24.6, that is, the analog input voltage of current acquisition is 2.46V. Assuming that the hardware overcurrent protection value is 12A, the analog input voltage of the hardware overcurrent protection comparator is (12A*0.01Ω)*8.2*(RS404 / RS203)=4.92V, that is, the comparison point voltage of the hardware overcurrent protection is 4.92V, and then the resistance values ​​of resistors RS408 and RS409 can be selected according to [5V / (RS408+RS409)]*RS409=4.92V.

[0071] (2) If used in a high-frequency rectification circuit, the circuit is used to process the output voltage and output current sampling signals; assuming that the output voltage is 600V, R1 selects a high-precision resistor with a resistance of 299kΩ, and R2 selects a high-precision resistor with a resistance of 1kΩ, that is, the voltage sampling is V_Sam1=600V / 300kΩ*1kΩ=2V; RS203 selects a high-precision resistor with a resistance of 1kΩ, RS204 selects a high-precision resistor with a resistance of 2kΩ, RS205 selects a high-precision resistor with a resistance of 2kΩ, and RS206 selects a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the voltage sampling isolation amplification and signal processing circuit, GV=(RS204 / RS203)*[RS206 / (RS205+RS206)]=1.2, that is, the analog input voltage of the voltage acquisition is 2.4V. Assuming that the hardware overvoltage protection value is 880V, the analog input voltage of the hardware overvoltage protection comparator is (660 / 300)*(RS204 / RS203)=4.4V, that is, the comparison point voltage of the hardware overvoltage protection is 4.4V, and then the resistance values ​​of resistors RS208 and RS209 can be selected according to [5V / (RS208+RS209)]*RS209=4.4V. Assuming the output current is 10A, R3 uses a high-precision shunt with a resistance of 10mΩ, that is, the current sampling is I_Sam=10A*10mΩ=0.1V; RS403 uses a high-precision resistor with a resistance of 2kΩ, RS404 uses a high-precision resistor with a resistance of 10kΩ, RS405 uses a high-precision resistor with a resistance of 2kΩ, and RS406 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the current sampling isolation amplification and signal processing circuit, GI=8.2*(RS404 / RS403)*[RS406 / (RS405+RS406)]=24.6, that is, the analog input voltage of current acquisition is 2.46V. Assuming that the hardware overcurrent protection value is 12A, the analog input voltage of the hardware overcurrent protection comparator is (12A*0.01Ω)*8.2*(RS404 / RS203)=4.92V, that is, the comparison point voltage of the hardware overcurrent protection is 4.92V, and then the resistance values ​​of resistors RS408 and RS409 can be selected according to [5V / (RS408+RS409)]*RS409=4.92V.

[0072] (3) If used in a step-up adjustable DC conversion circuit, the circuit is used to process the output voltage and output current sampling signals; assuming that the output voltage is 700V, R1 uses a high-precision resistor with a resistance of 349kΩ, and R2 uses a high-precision resistor with a resistance of 1kΩ, that is, the voltage sampling is V_Sam1=700V / 350kΩ*1kΩ=2V; RS203 uses a high-precision resistor with a resistance of 1kΩ, RS204 uses a high-precision resistor with a resistance of 2kΩ, RS205 uses a high-precision resistor with a resistance of 2kΩ, and RS206 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the voltage sampling isolation amplification and signal processing circuit, GV=(RS204 / RS203)*[RS206 / (RS205+RS206)]=1.2, that is, the analog input voltage of the voltage acquisition is 2.4V. Assuming that the hardware overvoltage protection value is 770V, the analog input voltage of the hardware overvoltage protection comparator is (770 / 350)*(RS204 / RS203)=4.4V, that is, the comparison point voltage of the hardware overvoltage protection is 4.4V, and then the resistance values ​​of resistors RS208 and RS209 can be selected according to [5V / (RS208+RS209)]*RS209=4.4V. Assuming the output current is 10A, R3 uses a high-precision shunt with a resistance of 10mΩ, that is, the current sampling is I_Sam=10A*10mΩ=0.1V; RS403 uses a high-precision resistor with a resistance of 2kΩ, RS404 uses a high-precision resistor with a resistance of 10kΩ, RS405 uses a high-precision resistor with a resistance of 2kΩ, and RS406 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the current sampling isolation amplification and signal processing circuit, GI=8.2*(RS404 / RS403)*[RS406 / (RS405+RS406)]=24.6, that is, the analog input voltage of current acquisition is 2.46V. Assuming that the hardware overcurrent protection value is 12A, the analog input voltage of the hardware overcurrent protection comparator is (12A*0.01Ω)*8.2*(RS404 / RS203)=4.92V, that is, the comparison point voltage of the hardware overcurrent protection is 4.92V, and then the resistance values ​​of resistors RS408 and RS409 can be selected according to [5V / (RS408+RS409)]*RS409=4.92V.

[0073] (4) If used in a step-down adjustable DC conversion circuit, the circuit is used to process the output voltage and output current sampling signals; assuming that the output voltage is 700V, R6 uses a high-precision resistor with a resistance of 349kΩ, and R7 uses a high-precision resistor with a resistance of 1kΩ, that is, the voltage sampling is V_Sam1=700V / 350kΩ*1kΩ=2V; RS203 uses a high-precision resistor with a resistance of 1kΩ, RS204 uses a high-precision resistor with a resistance of 2kΩ, RS205 uses a high-precision resistor with a resistance of 2kΩ, and RS206 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the voltage sampling isolation amplification and signal processing circuit, GV=(RS204 / RS203)*[RS206 / (RS205+RS206)]=1.2, that is, the analog input voltage of the voltage acquisition is 2.4V. Assuming that the hardware overvoltage protection value is 770V, the analog input voltage of the hardware overvoltage protection comparator is (770 / 350)*(RS204 / RS203)=4.4V, that is, the comparison point voltage of the hardware overvoltage protection is 4.4V, and then the resistance values ​​of resistors RS208 and RS209 can be selected according to [5V / (RS208+RS209)]*RS209=4.4V. Assuming the output current is 10A, R8 uses a high-precision shunt with a resistance of 10mΩ, that is, the current sampling is I_Sam2=10A*10mΩ=0.1V; RS403 uses a high-precision resistor with a resistance of 2kΩ, RS404 uses a high-precision resistor with a resistance of 10kΩ, RS405 uses a high-precision resistor with a resistance of 2kΩ, and RS406 uses a high-precision resistor with a resistance of 3kΩ. According to the overall ratio of the current sampling isolation amplification and signal processing circuit, GI=8.2*(RS404 / RS403)*[RS406 / (RS405+RS406)]=24.6, that is, the analog input voltage of current acquisition is 2.46V. Assuming that the hardware overcurrent protection value is 12A, the analog input voltage of the hardware overcurrent protection comparator is (12A*0.01Ω)*8.2*(RS404 / RS203)=4.92V, that is, the comparison point voltage of the hardware overcurrent protection is 4.92V, and then the resistance values ​​of resistors RS408 and RS409 can be selected according to [5V / (RS408+RS409)]*RS409=4.92V.

[0074] In summary, the embodiment of the present invention provides a multifunctional circuit design method based on the UUV wireless power transmission system. Through appropriate device selection and deformation, multiple functional modules such as high-frequency inverter circuit, high-frequency rectifier circuit, boost type adjustable DC conversion circuit and buck type adjustable DC conversion circuit required in the UUV wireless power transmission system can be designed, which can better adapt to various complex application scenarios of the UUV wireless power transmission system. In addition, the multifunctional circuit of the embodiment of the present invention adopts a modular design of the control circuit and the main power circuit, and the strong current of the power part and the weak current of the control part are designed as independent circuit boards, which can better avoid mutual interference between strong and weak currents; the control circuit and the main power circuit can be debugged and produced separately, reducing the difficulty of debugging and the cost of production. The multifunctional circuit design method provided by the embodiment of the present invention has the characteristics of strong adaptability, strong versatility, simple debugging, and wide application range. It can not only greatly reduce the research and development cycle of the UUV wireless power transmission system, but also relatively reduce the research and development cost and production cost.

[0075] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A multifunctional circuit design method based on UUV-WPT system, characterized in that: include: Step S1: designing a multifunctional circuit module consisting of a control circuit and a main power circuit; Step S2: by processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect tube power module in the main power circuit, a full-bridge high-frequency inverter circuit, a single-phase bridge high-frequency rectifier circuit, an interleaved parallel Boost step-up adjustable DC conversion circuit and a bridge Buck step-down adjustable DC conversion circuit for use in the UUV wireless power transmission system are obtained respectively; Among them, processing the connection relationship of at least one capacitor, inductor, resistor and / or field effect transistor power module in the main power circuit includes: short-circuiting at least one capacitor, resistor, inductor or field effect transistor power module; and non-welding at least one resistor.

2. The multifunctional circuit design method based on the UUV-WPT system according to claim 1 is characterized in that: The control circuit includes a power supply circuit, a DSP circuit connected to the power supply circuit, an isolation optocoupler circuit, a communication circuit, an isolation amplifier circuit, a signal processing circuit and an analog-to-digital conversion circuit; The power supply circuit converts the 24V instrument power into different voltages required by various circuits; the DSP circuit generates independent PWM signals, which are isolated by the isolation optocoupler circuit and sent to the drive circuit of the main power circuit respectively; meanwhile, the fault signal fed back by the main power circuit is isolated by the isolation optocoupler circuit and sent to the DSP circuit; The voltage and current signals collected by the main power circuit are first isolated and amplified by the isolation amplifier circuit, and then amplified and filtered by the signal processing circuit, and overvoltage and overcurrent signals are generated. The processed signals are sent to the analog-to-digital conversion circuit to be converted into digital signals, and finally the collected voltage and current signals are directly sent to the DSP circuit through the SPI bus; the communication signals of the DSP circuit are converted into CAN signals and 485 signals after being processed by the communication circuit to communicate with the host computer.

3. The multifunctional circuit design method based on the UUV-WPT system according to claim 2 is characterized in that: The main power circuit is composed of a bridge topology circuit, a power conversion circuit, a drive circuit, a sampling circuit, a fuse, a plurality of capacitors, a plurality of resistors and a plurality of inductors; Wherein, the bridge topology circuit is composed of two half-bridge field effect tube power modules; The driving circuit includes a first driving circuit, a second driving circuit, a third driving circuit and a fourth driving circuit; The power conversion circuit is composed of three 24V to 24V isolated power supplies. The first isolated power supply converts the 24V instrument power into a 24V isolated output 24V power supply, which is used to directly power the third drive circuit and the fourth drive circuit, and provide energy to the second isolated power supply and the third isolated power supply. The isolated 24V power supply output by the second isolated power supply is used to power the first drive circuit, and the isolated 24V power supply output by the third isolated power supply is used to power the second drive circuit; The sampling circuit includes a plurality of sampling resistors. A voltage sampling signal is obtained by voltage division of the sampling resistors, and a current sampling signal is obtained by current flowing through corresponding sampling resistors.

4. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The step S2 specifically includes: Step S21: short-circuiting the resistor R3, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit and unwelding the capacitor C2, the resistor R6 and the resistor R7 to obtain a full-bridge high-frequency inverter circuit for the UUV wireless power transmission system.

5. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The step S2 specifically includes: Step S22: short-circuiting the resistor R4, the inductor L1, the inductor L2 and the resistor R8 in the main power circuit, and not welding the capacitor C2, the resistor R6 and the resistor R7, so as to obtain a high-frequency rectification circuit for the UUV wireless power transmission system; Alternatively, by short-circuiting the resistor R4, the resistor R8, the inductor L1, the inductor L2 and the control ends of the two field effect tube power modules, and not welding the capacitor C2, the resistor R6 and the resistor R7, a high-frequency rectification circuit for the UUV wireless power transmission system is obtained.

6. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The step S2 specifically includes: Step S23: short-circuiting the resistors R4 and R8 in the main power circuit and the control ends of the upper tubes of the two field effect tube power modules, and not welding the capacitor C2, the resistor R6 and the resistor R7, so as to obtain an interleaved parallel Boost type DC conversion circuit for the UUV wireless power transmission system.

7. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The step S2 specifically includes: Step S24: short-circuiting the resistor R3, the resistor R4, the control end of the lower tube of the left half-bridge field effect tube power module, and the control end of the upper tube of the right half-bridge field effect tube power module in the main power circuit, and not welding the resistor R1 and the resistor R2, so as to obtain a bridge Buck step-down DC conversion circuit for the UUV wireless power transmission system.

8. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The field effect tube power module is a silicon carbide metal oxide field effect tube power module.

9. The multifunctional circuit design method based on the UUV-WPT system according to claim 2 is characterized in that: The isolation amplifier used in the isolation amplifier circuit is of model AMC1311 or AMC1301; the operational amplifier used in the signal processing circuit is of model LMV358.

10. The multifunctional circuit design method based on the UUV-WPT system according to claim 3 is characterized in that: The driving circuit adopts an integrated negative voltage bias driver IVCR1401.

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