Wireless energy transfer teaching demonstration device

Abstract

The utility model discloses a wireless energy transfer teaching demonstration device, which relates to the technical field of teaching demonstration and comprises a coupling receiving module and an energy transmitting module. The energy emission module comprises a square wave oscillation circuit, an isolation type drive circuit, a half-bridge drive and inverter circuit and an LC resonance emission unit which are electrically connected in sequence. The coupling receiving module comprises an LC resonance receiving unit, a double voltage rectifying circuit and a BUCK type direct current constant current source circuit which are electrically connected in sequence, the LC resonance receiving unit is matched with the LC resonance transmitting unit, and the BUCK type direct current constant current source circuit is used for driving a load; the distance between the transmitting coil of the LC resonance transmitting unit and the receiving coil of the LC resonance receiving unit is adjustable. The device can be used for teaching demonstration of wireless energy transmission, is good in reliability and visual, and has flexible operability.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching demonstration, in particular to a wireless energy transmission teaching demonstration device. Background Art

[0002] In the modern teaching environment, teaching demonstration devices play an indispensable role, providing teachers with the necessary tools to display course content and conduct experimental demonstrations. However, traditional teaching demonstration devices have many limitations and problems, including complex structure, unintuitive operation, cumbersome wiring, inconvenient use, and potential safety hazards. First, the structure of traditional teaching demonstration devices is usually complex. Due to the involvement of various electronic components and connection lines, the operation process is cumbersome and the use efficiency is low. This requires teachers to spend a lot of time and energy to prepare and operate these devices during the teaching process, affecting the fluency and effectiveness of teaching. Secondly, traditional teaching demonstration devices have the problem of unintuitive operation, and students often find it difficult to intuitively understand the teaching content, which affects their absorption and understanding of knowledge. This unintuitive operation also limits the application scope and flexibility of teaching demonstration devices. In addition, since traditional teaching demonstration devices need to be connected to the power supply through cables, there are problems of complex wiring and inconvenient use. This not only increases the installation and maintenance costs of the equipment, but also may have safety hazards, such as electric shock caused by loose or damaged cables, which poses a potential threat to the teaching environment and the safety of teachers and students. Therefore, in view of the various problems and limitations of traditional teaching demonstration devices, it is necessary to design a wireless energy transmission teaching demonstration device. Utility Model Content

[0003] The utility model provides a wireless energy transmission teaching demonstration device, which can solve the above problems.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0005] The utility model provides a wireless energy transmission teaching demonstration device, comprising a coupling receiving module and an energy transmitting module; the energy transmitting module comprises a square wave oscillation circuit, an isolated driving circuit, a half-bridge driving and inverter circuit, and an LC resonance transmitting unit which are electrically connected in sequence; the coupling receiving module comprises an LC resonance receiving unit, a double voltage rectifier circuit and a BUCK type DC constant current source circuit which are electrically connected in sequence, the LC resonance receiving unit is matched with the LC resonance transmitting unit, and the BUCK type DC constant current source circuit is used to drive a load; the spacing between the transmitting coil of the LC resonance transmitting unit and the receiving coil of the LC resonance receiving unit is adjustable.

[0006] In a preferred embodiment of the present invention, the square wave oscillation circuit includes a timing pulse chip U1, capacitors C1 and C2, an adjustable resistor R1, and a resistor R2, wherein the model of the timing pulse chip U1 is NE555, the capacitance of capacitors C1 and C2 are both 100nF, the resistance of resistor R2 is 10KΩ, and the adjustable resistor R1 is used to adjust the pulse frequency, and the maximum resistance is 10KΩ.

[0007] In a preferred embodiment of the present invention, the isolated driving circuit includes a driving isolation chip U2 and a 100nF capacitor C3, wherein the driving isolation chip U2 is electrically connected to the timing pulse chip U1 and has a model number of UCC37321P.

[0008] In a preferred embodiment of the utility model, the half-bridge drive and inverter circuit includes a drive chip U3, capacitors C4, C5, C6, C7 and C8, diodes D1, D2 and D3, adjustable resistors R3 and R4, field effect transistors Q1 and Q2, wherein the drive chip U3 is electrically connected to the drive isolation chip U2, and the model is IR2110STRPBF, the capacitors C4, C5 and C6 are all 2200μF polar capacitors, the capacitance of the capacitors C7 and C8 is 100nF, the model of the diodes D1 and D2 is 1N4148WS, the model of the diode D3 is 1N4007, the maximum resistance of the adjustable resistors R3 and R4 is 10KΩ, and the model of the field effect transistors Q1 and Q2 is IRF540NPBF.

[0009] In a preferred embodiment of the present invention, the LC resonance transmitting unit includes a transmitting coil L1 and a 100nF capacitor C9, wherein the transmitting coil L1 is an 18μH coil.

[0010] In a preferred embodiment of the present invention, the LC resonance receiving unit includes a receiving coil L2 and a 100nF capacitor C10, wherein the receiving coil L2 is an 18μH coil.

[0011] In a preferred embodiment of the present invention, the double voltage rectifier circuit includes polar capacitors C11, C12 and C13, each with a capacitance of 100 μF, and diodes D4 and D5, each with a model of MBR1545.

[0012] In a preferred embodiment of the present invention, the BUCK type DC constant current source circuit includes resistors R5, R6, R7 and R8, capacitors C14, C15, C16, C17, C18 and C19, a power management chip U4, a diode D6, a 330μH inductor L3, a current regulation management chip U5, and an adjustable resistor R9 with a maximum resistance of 10KΩ, wherein the resistance values ​​of resistors R5 and R6 are both 1KΩ, and the resistance value of resistor R7 is 10KΩ, the resistance of resistor R8 is 0.02Ω, the capacitance of capacitors C14, C15 and C18 are all 100nF, the capacitance of capacitor C16 is 10nF, the capacitance of capacitor C17 is 47nF, capacitor C19 is a polar capacitor with a capacitance of 100μF, the model of power management chip U4 is TPS54331DR, the model of diode D6 is MBR1545, and the model of current regulation management chip U5 is INA168NA / 3K.

[0013] In a preferred embodiment of the utility model, the wireless energy transmission teaching demonstration device also includes a cabinet, a metal support frame fixed to the cabinet and a cross bar horizontally installed on the metal support frame; the transmitting coil of the energy transmitting module is hung on the cross bar, and other structures are arranged in the cabinet; the receiving coil of the coupling receiving module is hung on the cross bar, and other structures are arranged in the cabinet.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) By adopting square wave oscillation circuit, isolated drive circuit, half-bridge drive and inverter circuit and other technologies, efficient energy transmission can be achieved. This wireless energy transmission teaching demonstration device can effectively demonstrate the transmission of energy to the receiving end and realize wireless power supply.

[0016] 2) The spacing between the LC resonant receiving unit and the LC resonant transmitting unit coils is adjustable, so that the receiving device can be flexibly adjusted and optimized according to actual teaching demonstration requirements.

[0017] 3) By adopting the BUCK type DC constant current source circuit, a stable DC current source can be provided to drive the load to work. This design can ensure the stability of the output current and improve the reliability and stability of the device.

[0018] 4) The wireless energy transmission teaching demonstration device involved in this patent has a wide range of applications and can be used in various teaching demonstration scenarios, such as science and technology education, physical experiments and other fields, providing new technical means and methods for teaching.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a structural schematic diagram of the wireless energy transmission teaching demonstration device described in the embodiment;

[0022] Figure 2 is a circuit schematic diagram of the energy transmission module described in the embodiment;

[0023] Figure 3 is a circuit schematic diagram of the coupling receiving module described in the embodiment;

[0024] In the figure: 1. Cabinet; 2. Metal support frame; 3. Crossbar; 4. Receiving coil; 5. Transmitting coil; 6. Coupling receiving module; 7. Energy transmitting module; 8. Load; 9. External power supply access cable. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0026] Please refer to Figure 1 This embodiment provides a wireless energy transmission teaching demonstration device, including a coupling receiving module 6, an energy transmitting module 7, a cabinet 1, a metal support frame 2 fixed to the cabinet 1, and a crossbar 3 horizontally installed on the metal support frame 2.

[0027] like Figure 2 As shown, the energy transmitting module 7 includes a square wave oscillation circuit, an isolated driving circuit, a half-bridge driving and inverter circuit, and an LC resonant transmitting unit which are electrically connected in sequence. The square wave oscillation circuit is used to generate a PMW signal with a duty cycle of 50%. The isolated driving circuit is used to perform anti-phase isolation on the oscillation signal to generate a dual-channel complementary PWM to the half-bridge driving unit of the half-bridge driving and inverter circuit. The half-bridge driving and inverter circuit is used to control the half-bridge circuit to output a high-frequency AC voltage to drive the energy excitation transmitting unit (i.e., the LC resonant transmitting unit).

[0028] The square wave oscillation circuit includes a timing pulse chip U1, capacitors C1 and C2, an adjustable resistor R1, and a resistor R2, wherein the model of the timing pulse chip U1 is NE555, the capacitance of capacitors C1 and C2 are both 100nF, the resistance of resistor R2 is 10KΩ, and the adjustable resistor R1 is used to adjust the pulse frequency, and the maximum resistance is 10KΩ.

[0029] The isolated driving circuit includes a driving isolation chip U2 and a 100nF capacitor C3, wherein the driving isolation chip U2 is electrically connected to the timing pulse chip U1 and has a model number of UCC37321P.

[0030] The half-bridge drive and inverter circuit includes a drive chip U3, capacitors C4, C5, C6, C7 and C8, diodes D1, D2 and D3, adjustable resistors R3 and R4, and field effect transistors Q1 and Q2. The drive chip U3 is electrically connected to the drive isolation chip U2, and its model is IR2110STRPBF. Capacitors C4, C5 and C6 are all 2200μF polar capacitors. The capacitance of capacitors C7 and C8 is 100nF. The models of diodes D1 and D2 are 1N4148WS, the model of diode D3 is 1N4007, the maximum resistance of adjustable resistors R3 and R4 is 10KΩ, and the models of field effect transistors Q1 and Q2 are IRF540NPBF.

[0031] The LC resonance transmitting unit includes a transmitting coil L1 and a 100nF capacitor C9, wherein the transmitting coil L1 is a 18μH coil.

[0032] Figure 2 The transmitting coil L1 in the Figure 1 The transmitting coil 5 is hung on the crossbar 3 and can slide along the crossbar 3. The transmitting coil 5 is a hollow coil with an outer diameter of 20±2cm. 2 The pure copper wire is wound 8 times. Except for the transmitting coil 5 , the other structures of the energy transmitting module 7 are all arranged in the cabinet 1 .

[0033] like Figure 3 As shown, the coupling receiving module 6 includes an LC resonance receiving unit, a double voltage rectifier circuit and a BUCK type DC constant current source circuit which are electrically connected in sequence. The LC resonance receiving unit is matched with the LC resonance transmitting unit and is used to receive energy from the LC resonance transmitting unit. The double voltage rectifier circuit is used to rectify the resonantly received AC into a pulsating DC. The BUCK type DC constant current source circuit is used to output a constant current to drive the load. Figure 3 The load in Figure 1 The load 8 is a 2W LED lamp bead.

[0034] The LC resonance receiving unit includes a receiving coil L2 and a 100nF capacitor C10, wherein the receiving coil L2 is a 18μH coil.

[0035] Figure 3 The receiving coil L2 in the Figure 1 The receiving coil 4 is hung on the crossbar 3 and can slide along the crossbar 3. The receiving coil 4 is a hollow coil with an outer diameter of 20±2cm. 2 The pure copper wire is wound 8 times. Except for the receiving coil 4 , the other structures of the coupling receiving module 6 are all arranged in the cabinet 1 .

[0036] This design makes the distance between the transmitting coil 5 of the energy transmitting module 7 (ie, the transmitting coil L1 of the LC resonance transmitting unit) and the receiving coil 4 of the coupling receiving module 6 (ie, the receiving coil L2 of the LC resonance receiving unit) adjustable.

[0037] Adjust the distance between the two coils on the crossbar 3, observe the brightness of the load 8, and record the distance at the brightest moment, which is the optimal transmission distance of the two coils.

[0038] The voltage doubling rectifier circuit includes polar capacitors C11, C12 and C13, each with a capacitance of 100 μF, and diodes D4 and D5, each with a model of MBR1545.

[0039] The BUCK type DC constant current source circuit includes resistors R5, R6, R7 and R8, capacitors C14, C15, C16, C17, C18 and C19, a power management chip U4, a diode D6, a 330μH inductor L3, a current regulation management chip U5, and an adjustable resistor R9 with a maximum resistance of 10KΩ, wherein the resistance values ​​of resistors R5 and R6 are both 1KΩ, the resistance value of resistor R7 is 10KΩ, the resistance value of resistor R8 is 0.02Ω, the capacitance values ​​of capacitors C14, C15 and C18 are all 100nF, the capacitance value of capacitor C16 is 10nF, the capacitance value of capacitor C17 is 47nF, capacitor C19 is a polar capacitor with a capacitance value of 100μF, the model of power management chip U4 is TPS54331DR, the model of diode D6 is MBR1545, and the model of current regulation management chip U5 is INA168NA / 3K. The current delivered to the load by the BUCK type DC constant current source circuit can be adjusted by the adjustable resistor R9.

[0040] Figure 1 The external power supply access cable 9 is used to connect the external power supply to provide +5V power for the square wave oscillation circuit of the energy transmission module 7.

[0041] As an extended structure of the wireless energy transmission teaching demonstration device described in the utility model, a boat-shaped switch, a button, an output information display screen and an input information display screen can be set in the cabinet 1, wherein the output information display screen is used to display the voltage, current and power parameters of the coupling receiving module 6, the input information display screen is used to display the resonant frequency, voltage, current and power parameters of the energy transmitting module 7, the button is used to switch the display content, set the resonant frequency, voltage and current parameters, and the boat-shaped switch is used to turn on the power supply of the device, that is, to connect the +5V power supply to the energy transmitting module 7.

[0042] The wireless energy transmission teaching demonstration device described in this embodiment is a device designed to facilitate the teaching of power electronics and electromagnetic technology courses. It aims to stimulate students' autonomous learning by intuitively displaying technical characteristics, facilitating parameter changes, and promoting classroom teaching. The device uses wireless energy transmission technology to transmit electrical energy from one end to the other without using traditional wire connections. This wireless energy transmission technology has important applications in the field of modern science and technology, such as wireless charging, wireless sensor networks, etc.

[0043] The teaching demonstration device has the following features:

[0044] 1. Demonstration of technical characteristics: The device can intuitively demonstrate the principle and working mode of wireless energy transmission. Students can gain a deeper understanding of related concepts such as electromagnetic induction, electromagnetic field theory, and power transmission through observation and experiments.

[0045] 2. Adjustable parameters: The device is designed flexibly, and the resonant frequency parameters, transmission power, etc. can be adjusted. The transmission distance, transmission power, etc. can also be adjusted by changing the coil spacing. By changing these parameters, students can observe and analyze the energy transfer effects under different conditions and gain a deeper understanding of the relevant physical phenomena and engineering applications.

[0046] 3. Convenient for classroom teaching: The device is easy to carry and set up, and is suitable for demonstration and experiments in the classroom. Teachers can use the demonstration device to show and explain in real time, adjust the coil distance and resonant frequency, and intuitively see the brightness of the load LED, helping students better understand and master relevant knowledge.

[0047] 4. Stimulation of autonomous learning: The design of the device encourages students to actively participate in experiments and explorations, stimulating their autonomous learning ability. Students can conduct further research and experiments based on their interests and curiosity to expand their knowledge and skills.

[0048] The introduction of this wireless energy transfer teaching demonstration device can provide a more vivid and practical way for the teaching of power electronics and electromagnetic technology, helping students to better understand and apply relevant theoretical knowledge. At the same time, it can also stimulate students' interest and independent learning ability, and cultivate their innovative thinking and problem-solving ability.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wireless energy transmission teaching demonstration device, characterized in that: It comprises a coupling receiving module and an energy transmitting module; the energy transmitting module comprises a square wave oscillation circuit, an isolated driving circuit, a half-bridge driving and inverter circuit, and an LC resonance transmitting unit which are electrically connected in sequence; the coupling receiving module comprises an LC resonance receiving unit, a double voltage rectifier circuit and a BUCK type DC constant current source circuit which are electrically connected in sequence, the LC resonance receiving unit is matched with the LC resonance transmitting unit, and the BUCK type DC constant current source circuit is used to drive a load; the spacing between the transmitting coil of the LC resonance transmitting unit and the receiving coil of the LC resonance receiving unit is adjustable.

2. The wireless energy transmission teaching demonstration device according to claim 1, characterized in that: The square wave oscillation circuit includes a timing pulse chip U1, capacitors C1 and C2, an adjustable resistor R1, and a resistor R2, wherein the timing pulse chip U1 is of model NE555, the capacitances of capacitors C1 and C2 are both 100nF, the resistance of resistor R2 is 10KΩ, and the adjustable resistor R1 is used to adjust the pulse frequency, and the maximum resistance is 10KΩ.

3. The wireless energy transmission teaching demonstration device according to claim 2, characterized in that: The isolated driving circuit includes a driving isolation chip U2 and a 100nF capacitor C3, wherein the driving isolation chip U2 is electrically connected to the timing pulse chip U1 and has a model number of UCC37321P.

4. The wireless energy transmission teaching demonstration device according to claim 3 is characterized in that: The half-bridge drive and inverter circuit includes a drive chip U3, capacitors C4, C5, C6, C7 and C8, diodes D1, D2 and D3, adjustable resistors R3 and R4, and field effect transistors Q1 and Q2, wherein the drive chip U3 is electrically connected to the drive isolation chip U2, and its model is IR2110STRPBF, capacitors C4, C5 and C6 are all 2200μF polar capacitors, the capacitance of capacitors C7 and C8 is 100nF, the models of diodes D1 and D2 are 1N4148WS, the model of diode D3 is 1N4007, the maximum resistance of adjustable resistors R3 and R4 is 10KΩ, and the model of field effect transistors Q1 and Q2 is IRF540NPBF.

5. The wireless energy transmission teaching demonstration device according to claim 4, characterized in that: The LC resonance transmitting unit includes a transmitting coil L1 and a 100nF capacitor C9, wherein the transmitting coil L1 is a 18μH coil.

6. The wireless energy transmission teaching demonstration device according to claim 5, characterized in that: The LC resonance receiving unit includes a receiving coil L2 and a 100nF capacitor C10, wherein the receiving coil L2 is a 18μH coil.

7. The wireless energy transmission teaching demonstration device according to claim 6, characterized in that: The voltage doubling rectifier circuit includes polar capacitors C11, C12 and C13, each with a capacitance of 100 μF, and diodes D4 and D5, each with a model of MBR1545.

8. The wireless energy transmission teaching demonstration device according to claim 7, characterized in that: The BUCK type DC constant current source circuit includes resistors R5, R6, R7 and R8, capacitors C14, C15, C16, C17, C18 and C19, a power management chip U4, a diode D6, an inductor L3 of 330μH, a current regulation management chip U5, and an adjustable resistor R9 with a maximum resistance of 10KΩ, wherein the resistance values ​​of resistors R5 and R6 are both 1KΩ, the resistance value of resistor R7 is 10KΩ, the resistance value of resistor R8 is 0.02Ω, the capacitance values ​​of capacitors C14, C15 and C18 are all 100nF, the capacitance value of capacitor C16 is 10nF, the capacitance value of capacitor C17 is 47nF, capacitor C19 is a polar capacitor with a capacitance value of 100μF, the model of the power management chip U4 is TPS54331DR, the model of the diode D6 is MBR1545, and the model of the current regulation management chip U5 is INA168NA / 3K.

9. The wireless energy transmission teaching demonstration device according to claim 1, characterized in that: The device also includes a cabinet, a metal support frame fixed to the cabinet and a crossbar horizontally installed on the metal support frame; the transmitting coil of the energy transmitting module is hung on the crossbar, and other structures are arranged in the cabinet; the receiving coil of the coupling receiving module is hung on the crossbar, and other structures are arranged in the cabinet.

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