An isolation type DC-DC drive circuit comparison experiment device and method

Abstract

The present invention provides a comparative experimental device for an isolated DC-DC drive circuit, including an independently arranged wireless transmitter, a wireless receiver, a DC-DC drive circuit module, a charging trolley test end, and a host computer end. During the experiment, the DC-DC drive circuit module is arranged in the wireless transmitter, and the wireless transmitter, the wireless receiver, and the charging trolley test end all send data to the host computer end. The present invention updates the isolated DC-DC experimental training equipment from discrete component assembly to detachable modules, reducing the time for trainees to build circuits and reducing the potential safety hazards existing in circuit building.

Description

Technical Field

[0001] The present invention belongs to the technical field of power electronics, and in particular relates to an isolation type DC-DC drive circuit comparison experiment device and method. Background Art

[0002] An experimental training device is an instrument for assisting teaching, used to verify theoretical knowledge or conduct innovative experiments in teaching. It has the characteristics of being reusable, protecting the safety of users, simple operation, and simple circuit connection.

[0003] In the traditional teaching process of electronic courses, when teachers explain the circuit composition and its performance, they mostly use theoretical derivation, waveform analysis, or PPT display. Such teaching methods increase the learning difficulty of electronic courses, and it is impossible to intuitively experience the impact of different circuits on performance from the data, making it difficult for students to understand theoretical concepts.

[0004] In the existing isolation type DC-DC drive circuit experimental training device, generally, the required drive circuit is realized by building discrete components, and then the experimental parameters are read through the measurement of instruments. However, this experimental training scheme requires a lot of time and has certain risks during the circuit building process, and the experimental results are only single data, and it is impossible to intuitively see the impact of different drive circuits on the actual effect. Summary of the Invention

[0005] In view of this, the present invention aims to propose an isolation type DC-DC drive circuit comparison experiment device to solve the problems existing in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] An isolation type DC-DC drive circuit comparison experiment device includes an independently arranged wireless transmitter, wireless receiver, DC-DC drive circuit module, charging trolley test end, and host computer end. During the experiment, the DC-DC drive circuit module is arranged in the wireless transmitter, and the wireless transmitter, wireless receiver, and charging trolley test end all send data to the host computer end.

[0008] Furthermore, the wireless transmitter includes a power interface, a wireless transmitter power switch, a module interface ejector pin, a module magnetic attraction combined part, a wireless transmitter display module, a wireless transmitter combined part, a transmitting coil, a wireless receiver microcontroller, a wireless serial port module, a first current detection module, and a drive signal module, wherein

[0009] The power interface is arranged on the left side of the wireless transmitter, and a power cord can be inserted into the power interface to supply power to the device;

[0010] The module magnetic adsorption bonded component is arranged on the upper surface of the wireless transmitter, including four cylindrical or square grooves containing the first magnetic components;

[0011] The module interface ejector pins are arranged on the upper surface of the wireless transmitter, including two columns and six rows of metal contact retractable ejector pins;

[0012] The wireless transmitter bonding component is arranged on the bottom surface of the wireless transmitter, and is a cylindrical or square convex structure;

[0013] The power switch of the wireless transmitter is installed on the right side of the power interface;

[0014] The transmitting coil is fixed on the right side surface of the wireless transmitter by means of pasting;

[0015] The wireless transmitter microcontroller, wireless serial port module, first current detection module and drive signal module are concentrated on the wireless transmission main control board and placed inside the wireless transmitter.

[0016] Further, the wireless receiver includes a receiving coil, a microcontroller battery compartment, a microcontroller switch, a timing display device, a charging timing button, a wireless receiver bonding component, a receiver display module, a charging interface ejector pin, a charging magnetic adsorption bonded component, an energizable controllable coil, a receiver microcontroller, a voltage detection module, a second current detection module, a serial port and Bluetooth communication module, a rectification module,

[0017] The transmitting coil is fixed on the left side surface of the wireless transmitter by means of pasting;

[0018] The microcontroller charging compartment is located at the central bottom of the rear side of the wireless receiver;

[0019] The microcontroller switch is located on the left side of the microcontroller charging compartment;

[0020] The charging magnetic adsorption bonded component is located on the right side of the wireless receiver, and is two cylindrical or square grooves, and an energizable controllable coil is arranged at the end of the groove;

[0021] The wireless receiver bonding component is arranged at the bottom of the wireless receiver, and is a cylindrical or square convex structure;

[0022] The charging interface ejector pins are arranged at the center of the charging magnetic adsorption bonded component, and are two columns and six rows of metal retractable ejector pins;

[0023] The receiver display module and the timing display device are arranged on the front surface of the wireless receiver, and the charging timing button is located on the right side of the timing display device;

[0024] The wireless receiver microcontroller, voltage detection module, second current detection module, serial port and Bluetooth communication module, rectification module are concentrated on the wireless reception main control circuit board and placed inside the wireless receiver.

[0025] Furthermore, the receiving coil and the transmitting coil are single-layer coils with a diameter of 10 cm wound in a spiral manner from the inside to the outside using enameled wire with a wire diameter of 2.0, and the distance between the two coils is 4 cm.

[0026] Furthermore, the DC-DC drive circuit module includes a module interface, a module magnetic attraction combination component and electronic components of the corresponding circuit. The module interface is located at the bottom of the DC-DC drive circuit module and is a non-retractable cylindrical metal with two columns and six rows. The module magnetic attraction combination component is located at the bottom of the DC-DC drive circuit module and is a convex component containing a second magnetic part with a position and shape corresponding to the module magnetic attraction combined component.

[0027] Furthermore, the test end of the charging cart includes a charging cart and a bottom plate. Among them,

[0028] The charging cart includes a charging magnetic attraction combination component and a power switch, which are located on the left side of the cart and are convex components with a position and shape corresponding to the charging magnetic attraction combined component;

[0029] The charging interface is a non-retractable cylindrical metal with two columns and six rows located in the center of the charging magnetic attraction combination component and the power switch;

[0030] The bottom plate includes a measurement scale, a runway baffle, a wireless transmitting end combined component, and a wireless receiving end combined component. The side where the 0 scale of the scale is located is the right side perpendicular to the bottom plate of the wireless receiving end, and the scale values are engraved on both sides of the bottom plate. The ultrasonic sensor is located at the right end of the bottom plate and is fixed outside the runway baffle. The wireless transmitting end combined component is 4 concave components, and its position and shape correspond to the wireless transmitting end combination component. The wireless receiving end combined component is 4 concave components, and its position and shape correspond to the wireless receiving end combination component.

[0031] Furthermore, the main control board of the wireless transmitting end, the drive signal module is connected to the module interface pin, the wireless serial port module is connected to the serial port pin of the transmitting end microcontroller, the first current detection module is connected to the AD conversion pin of the transmitting end microcontroller, and the wireless transmitting end display module is connected to the general IO output pin of the transmitting end microcontroller.

[0032] Furthermore, the main control board of the wireless receiving end, the rectification module is connected to the receiving coil. The transmitting end and receiving end of the ultrasonic module located on the bottom plate are respectively connected to the AD output and input pins of the receiving end microcontroller. The voltage dividing voltage detection module is connected to the AD conversion pin of the receiving end microcontroller. The second current detection module is connected to the AD conversion pin of the receiving end microcontroller. The serial port and Bluetooth communication module is connected to the serial port pin of the receiving end microcontroller. The receiving end display module, the timing display device and the charging timing button are connected to the general IO pins of the receiving end microcontroller.

[0033] Further, the timing display device is used to display the remaining time during the charging of the charging trolley, with the unit being seconds.

[0034] Another object of the present invention is to propose a method for comparing isolated DC-DC drive circuits, which specifically includes the following steps:

[0035] Step 1: First, place the bottom plate on the test bench, install the wireless transmitter and the wireless receiver on the bottom plate, and supply power to the wireless transmitter.

[0036] Step 2: Select the DC-DC drive circuit module to be used and install it at the installation position of the wireless transmitter in a magnetic adsorption manner.

[0037] Step 3: Supply power to the wireless transmitter with a power cord, install a battery on the wireless receiver, and turn on the power switch of the wireless receiver controller and the power switch of the wireless transmitter.

[0038] Step 4: Use the display device of the wireless transmitter and the display device of the wireless receiver to read the experimental result parameters.

[0039] Step 5: Pair the Bluetooth device of the experimental training equipment at the upper computer end and set the charging time.

[0040] Step 6: Place the charging trolley at the charging position, press the charging timing button to charge the trolley.

[0041] After the time is up, the trolley will move forward automatically. Wait for the trolley to stop and then read the forward distance of the trolley through the scale.

[0042] Step 7: Perform data analysis and save it at the upper computer.

[0043] Step 8: Press the timing clear button and replace the DC-DC drive circuit module, and repeat Steps 4 to 6 until the tests of all four drive circuits are completed.

[0044] Step 9: Use the upper computer to set the data curve to be generated, observe the efficiency curve, and compare the output current, output power of the transmitter and the open-circuit voltage, short-circuit current and input power of the receiver under the four module states.

[0045] Step 10: Record the efficiency curve and the experimental data.

[0046] Step 11: Turn off the power switch of the wireless transmitter and the power switch of the microcontroller of the wireless receiver, and take out the battery of the wireless receiver.

[0047] Step 12: Disconnect the DC-DC drive circuit module from the wireless transmitter, disconnect the wireless transmitter and the wireless receiver from the bottom plate, and save all the equipment.

[0048] Compared with the prior art, the isolation type DC-DC drive circuit comparison experiment device and method of the present invention have the following advantages:

[0049] (1) The present invention updates the isolation type DC-DC experiment and training equipment from discrete component assembly to detachable modules, reducing the time for trainees to build circuits and reducing the potential safety hazards in circuit building;

[0050] (2) The present invention is divided into a wireless transmitting end, a wireless receiving end, a trolley test system and a host computer end, and is small in size, facilitating the storage, transfer and carrying of the equipment;

[0051] (3) In the wireless transmitting end and the wireless receiving end of the present invention, after receiving energy, the microcontroller automatically measures and calculates the short-circuit current and its open-circuit voltage, and calculates the input power and output power, and then displays the data on the digital tube display module, avoiding the cumbersome process of using traditional instruments for measurement;

[0052] (4) The trolley measurement system used in the present invention can perform timed charging on the charging trolley by using the interface, switch and timing device of the wireless receiving end. After charging, it can run on the track. By measuring the distance, the efficiency of four circuits can be compared, converting the previous boring data, waveforms and other theoretical analyses into actual visual effects and increasing the interest of the experiment and training;

[0053] (5) This device uses host computer software. Utilizing the data processing ability of the computer, corresponding settings can be made according to the requirements of the course topics, and the processed data is comprehensively processed to form relevant curves that meet the requirements, improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The attached drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0055] Figure 1 is the system block diagram of the experiment and training device provided by the present invention;

[0056] Figure 2 is the schematic diagram of the principle of four DC-DC drive circuit modules provided by the present invention;

[0057] Figure 3 is the overall machine diagram of the experiment and training device provided by the present invention.

[0058] Figure 4 is the schematic diagram of the wireless transmitting end provided by the present invention.

[0059] Figure 5 is the top view of the opened cover of the wireless transmitting end provided by the present invention.

[0060] Figure 6 It is a schematic diagram of the wireless receiver provided by the present invention.

[0061] Figure 7 It is a top view of the opened cover of the wireless receiver provided by the present invention.

[0062] Figure 8 It is a rear view of the wireless receiver provided by the present invention.

[0063] Figure 9 It is a schematic diagram of the magnetic adsorption trolley charging interface provided by the present invention.

[0064] Figure 10 It is a schematic diagram of the charging trolley provided by the present invention.

[0065] Figure 11 It is a schematic diagram of the bottom plate provided by the present invention.

[0066] Figure 12 It is a schematic diagram of the bottom of the DC-DC circuit drive module provided by the present invention.

[0067] Description of the reference numerals:

[0068] 1 - Power cord, 2 - Power interface, 3 - Power switch of the wireless transmitter, 4 - Wireless transmitter, 5 - Module interface ejector pin, 6 - Module magnetic adsorption bonded part, 7 - Display module of the wireless transmitter, 8 - Bonded part of the wireless transmitter, 9 - Transmitting coil, 10 - Receiving coil, 11 - Wireless receiver, 12 - Microcontroller battery compartment, 13 - Power switch of the microcontroller, 14 - Timing display device, 15 - Charging timing button, 16 - Bonded part of the wireless receiver, 17 - Display module of the receiver, 18 - Charging interface ejector pin, 19 - Charging magnetic adsorption bonded part, 20 - DC-DC drive circuit module, 21 - Module interface, 22 - Module magnetic adsorption bonding part, 23 - Charging trolley, 24 - Charging trolley magnetic adsorption bonded part and power switch, 25 - Bottom plate, 26 - Scale, 27 - Track baffle, 28 - Trolley charging interface, 29 - Bonded part of the wireless transmitter, 30 - Bonded part of the wireless receiver, 31 - Microcontroller of the wireless transmitter, 32 - Wireless serial port module, 33 - First current detection module, 34 - Drive signal module, 35 - Energized controllable coil, 36 - Microcontroller of the wireless receiver, 37 - Voltage detection module, 38 - Second current detection module, 39 - Serial port and Bluetooth communication module, 40 - Rectification module, 41 - Ultrasonic sensor. Detailed implementation manners

[0069] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0070] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0071] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0072] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0073] The present invention uses a wireless charging system as a carrier, adopts a detachable modular structure in its drive circuit part, and is attached with four typical isolated DC-DC drive modules, which can be replaced at any time. This reduces the time spent by trainees in building circuits with discrete components and avoids potential safety hazards in circuit building.

[0074] Microcontrollers are added to the wireless transmitting end and the wireless receiving end. The microcontrollers at the wireless transmitting end and the wireless receiving end can continuously scan and measure the input current at the transmitting end, the short-circuit current and open-circuit voltage at the receiving end, calculate them to obtain the input power value and the received power value, and then display the data on the panels of the transmitting end and the receiving end through a digital tube display module. This avoids the cumbersome process of using traditional instruments for measurement and the possibility of data reading errors, and the data can be sent to the PC in the experimental training room, and the software is used to perform arithmetic processing on the collected data to obtain corresponding analysis curves.

[0075] A charging cart test system is attached to the end of the wireless receiver. The charging cart can be charged at a fixed time through the interface module and timing device of the wireless receiver. After the charging is completed, the cart is driven to move forward on the test track, and the experimental results are compared by the control variable method. This makes the experimental results break away from the pure theoretical forms such as past data analysis and waveform analysis, but directly observes the results through the driving distance of the cart in the test system.

[0076] Specifically, as Figures 3 - 8 shown, a comparative experiment device for an isolated DC-DC drive circuit includes a wireless transmitter, a wireless receiver, a DC-DC drive circuit module, a charging cart test terminal and a host computer software terminal.

[0077] The wireless transmitter 4 includes a power interface 2, a wireless transmitter power switch 3, a module interface probe 5, a module magnetic attraction combined part 6, a wireless transmitter display module 7, a wireless transmitter combined part 8, a transmitting coil 9, a wireless receiver microcontroller 31, a wireless serial port module 32, a current detection module 33, and a drive signal module 34. The power interface 2 provided on the left side of the wireless transmitter 4 can be used to supply power to the device by inserting a power cord 1 into the power interface 2. The module magnetic attraction combined part 6 is four cylindrical or square grooves containing first magnetic parts on the upper surface of the wireless transmitter 4. The module interface probe 5 is a two-column and six-row metal contact retractable probe. The wireless transmitter combined part 8 is a cylindrical or square convex structure on the bottom surface of the wireless transmitter 4. The wireless transmitter power switch 3 is installed on the right side of the power interface 2. The transmitting coil 9 is fixed to the right side of the wireless transmitter 4 by pasting. The wireless receiver microcontroller 31, the wireless serial port module 32, the first current detection module 33 and the drive signal module 34 are concentrated on the wireless transmission main control board and placed inside the wireless transmitter 4.

[0078] The wireless receiver 11 includes a receiving coil 10, a microcontroller battery compartment 12, a microcontroller switch 13, a timing display device 14, a charging timing button 15, a wireless receiver combining component 16, a receiver display module 17, a charging interface ejector pin 18, a charging magnetic absorption combined component 19, an energizable controllable coil 35, a receiver microcontroller 36, a voltage detection module 37, a current detection module 38, a serial port and Bluetooth communication module 39, and a rectification module 40. The transmitting coil 10 is fixed to the left side surface of the wireless transmitter 11 by means of pasting. The microcontroller charging compartment 12 is located at the central bottom of the rear side of the wireless receiver 11. The microcontroller switch 13 is located on the left side of the microcontroller charging compartment 12. The charging magnetic absorption combined component 19 is located on the right side of the wireless receiver 11 and is two cylindrical or square grooves. An energizable controllable coil 35 is provided at the end of the groove. The wireless receiver combining component 16 is a cylindrical or square convex structure at the bottom of the wireless receiver 11. The charging interface ejector pin 18 is in the center of the charging magnetic absorption combined component 19 and is a two-column and six-row metal retractable ejector pin. The receiver display module 17 and the timing display device 14 are on the front surface of the wireless receiver 11. The charging timing button 15 is located on the right side of the timing display device. The receiver microcontroller 36, the voltage detection module 37, the second current detection module 38, the serial port and Bluetooth communication module 39, and the rectification module 40 are concentrated on the wireless receiving main control board and are placed inside the wireless receiver 11.

[0079] The DC-DC drive circuit module 20 includes a module interface 21, a module magnetic absorption combining component 22 and electronic components of the corresponding circuit. The module interface is at the bottom of the DC-DC drive circuit module and is a two-column and six-row non-retractable cylindrical metal. The module magnetic absorption combining component 22 is a convex component containing a second magnetic part located at the bottom of the DC-DC drive circuit module 20, with its position and shape corresponding to those of the module magnetic absorption combined component 6. The upper surface of the DC-DC drive circuit module is the electronic components necessary for the module circuit.

[0080] The charging cart test system includes a charging cart 23 and a bottom plate 25. Among them, the charging cart 25 includes a charging magnetic adsorption combination component and a power switch 24, which is located on the left side of the cart. A convex component with a position and shape corresponding to the charging magnetic adsorption combined component 19. The charging interface 28 is an inextensible cylindrical metal with two columns and six rows located in the center of the charging magnetic adsorption combination component and the power switch 24. The bottom plate 25 includes a measuring scale 26, a runway baffle 27, a wireless transmitting end combined component 29, and a wireless receiving end combined component 30. The 0 scale of the scale 26 is the side perpendicular to the bottom plate on the right side of the wireless receiving end 11, and the scale values are engraved on both sides of the bottom plate 25. The ultrasonic sensor is fixed on the outer side of the runway baffle 27 at the right end of the bottom plate. The wireless transmitting end combined component 29 is 4 concave components, and its position and shape correspond to the wireless transmitting end combined component 8. The wireless receiving end combined component 30 is 4 concave components, and its position and shape correspond to the wireless receiving end combined component 19.

[0081] The above-mentioned DC-DC drive circuit module 20 can be magnetically combined with the module magnetic adsorption combined component 6 through the module magnetic adsorption combined component 22. When the two are combined, the module interface 21 compresses the module interface ejector pin 5, causing the module interface ejector pin 5 to retract inward, and making the module interface 21 in contact connection with the module interface ejector pin 5.

[0082] The above-mentioned wireless transmitting end 4 can be installed and disassembled with the wireless transmitting end combined component 29 on the bottom plate 25 through the wireless transmitting end combined component 8 by plugging and unplugging. The wireless receiving end 11 can be installed and disassembled with the wireless receiving end combined component 30 on the bottom plate 25 through the wireless receiving end combined component 16 by plugging and unplugging.

[0083] The above-mentioned wireless transmitting end display module 7, timing display device 14, wireless receiving end display module 17, and received power display component 18 are standard four-digit digital tubes.

[0084] The above-mentioned power switch 3 and microcontroller power switch 13 are standard two-position boat switches.

[0085] The above-mentioned receiving coil 9 and transmitting coil 10 are single-layer coils with a diameter of 10CM wound in a spiral manner from the inside to the outside using enameled wire with a wire diameter of 2.0, and the distance between the two coils is 4CM.

[0086] The above-mentioned charging timing button 15 is a standard tactile button. Its right button is the start charging button. Pressing this button starts the timing device and the wireless receiving end attracts and charges the cart; the left button is the clear timing button, which is used to clear the previous timing before recharging.

[0087] The above-mentioned microcontroller battery compartment 12 can be installed with a replaceable 9V square battery to supply power to the microcontroller.

[0088] The diameter of the ejector pin 5 of the above module interface is smaller than the diameter of the module interface 21, and the diameter of the ejector pin 19 of the charging interface of the wireless transmitter is smaller than the diameter of the charging interface 28 of the trolley.

[0089] The first magnetic material of all the above magnetic materials has an attracting effect on the second magnetic material. The shapes of all the combining parts and the parts to be combined correspond to each other, and the length and diameter of the combining parts are slightly smaller than those of the combining parts.

[0090] The forward conversion circuit module of the above DC-DC drive module consists of an isolation transformer, a power MOSFET, a diode, an inductor, and a capacitor. The source of the power MOSFET T1 is connected to the primary winding. The drain of T1 is connected to the anode of the diode VD3 and also connected to the negative pole of the power supply. The gate of T1 is connected to the drive signal. The cathode of the diode VD3 is connected to the reset winding. The other side of the primary winding is connected to the other side of the reset winding and also connected to the positive pole of the power supply. One end of the secondary winding is connected to the anode of the diode VD2, and the other end is connected to the anode of the diode VD3. The cathodes of the diodes VD2 and VD3 are connected and then connected to the inductor L. One end of the inductor L is connected to the positive pole of the capacitor C, and the negative pole of the capacitor C is connected to the anode of the diode VD2. The push-pull conversion circuit module consists of an isolation transformer, a power MOSFET, a diode, an inductor, and a capacitor. The source of the power MOSFET T1 is connected to the primary winding. The drain of T1 is connected to the drain of the power MOSFET T2 and also connected to the negative pole of the input power supply. The source of T2 is connected to the other end of the primary winding. The gates of T1 and T2 are connected to the drive signal. The center tap of the primary winding is connected to the positive pole of the power supply. One end of the secondary winding is connected to the anode of the diode VD1, and the other end is connected to the anode of the diode VD2. The cathodes of the diodes VD1 and VD2 are connected to the center tap of the secondary winding, and the cathode of VD1 is connected to the inductor L. The other end of the inductor L is connected to the positive pole of the capacitor C, and the other end of the capacitor C is connected to the center tap of the secondary winding. The half-bridge conversion circuit module consists of an isolation transformer, a power MOSFET, a diode, an inductor, and a capacitor. The source of the MOS transistor T1 is connected to the positive pole of the capacitor C1 and the positive pole of the power supply. The drain of T1 is connected to the drain of the MOS transistor T2 and one end of the primary winding. The gate of T1 is connected to the drive signal. The source of T2 is connected to the negative pole of the capacitor C2 and the negative pole of the power supply. The positive pole of the capacitor C2 is connected to the negative pole of C1 and one end of the primary winding. The secondary winding is connected to the anode of the diode VD1, and the other end is connected to the anode of the diode VD2. The cathodes of VD1 and VD2 are connected together and connected to the center tap of the secondary winding. The cathode of VD1 is connected to the inductor L. The other end of L is connected to the positive pole of the capacitor C3, and the negative pole of C3 is connected to the center tap of the secondary winding. The full-bridge conversion circuit module consists of an isolation transformer, a power MOSFET, a diode, an inductor, and a capacitor. The source of the MOS transistor T1 is connected to the source of T3 and the positive pole of the power supply. The drain of T1 is connected to the drain of T2 and the primary winding. The drain of T3 is connected to the drain of T4 and the other end of the primary winding. The source of T2 is connected to the source of T4 and the negative pole of the power supply. The cathode of the diode VD1 is connected to the cathode of VD3 and one end of the inductor L. The anode of VD1 is connected to one end of the secondary winding and the cathode of VD2. The anode of VD3 is connected to one end of the secondary winding and the cathode of VD4. The anodes of VD2 and VD4 are connected.

[0091] For the above-mentioned main control board of the wireless transmitter, the drive signal module 34 is connected to the module interface probe 5, the wireless serial port module 32 is connected to the serial port pin of the transmitter microcontroller 31, the ACS712 current detection module 33 is connected to the AD conversion pin of the transmitter microcontroller 33, and the wireless transmitter display module 7 is connected to the general IO output pin of the microcontroller.

[0092] For the above-mentioned main control board of the wireless receiver, the rectification module 40 is connected to the receiving coil 10. The transmitting end and the receiving end of the HC-SR04 ultrasonic module 41 located on the bottom board are respectively connected to the AD output and input pins of the receiver microcontroller 36. The voltage division type voltage detection module 37 is connected to the AD conversion pin of the receiver microcontroller 36. The ACS712 current detection module 38 is connected to the AD conversion pin of the receiver microcontroller 36. The serial port and Bluetooth communication module 39 is connected to the serial port pin of the receiver microcontroller 36. The receiver microcontroller 36, the timing display device 14, and the charging timing button 15 are connected to the general IO pins of the receiver microcontroller 36.

[0093] The magnetic absorption joint part and the power switch 24 of the above-mentioned charging cart are long-stemmed touch buttons. The stem is made of metal and is in a retracted state under normal conditions. The stem can be stretched when force is applied. The magnetic absorption joint part and the power switch 24 of the charging cart are also the power switch of the charging cart 23. When it is in the retracted state, the power switch of the cart is turned on, and when it is in the stretched state, the power switch of the cart is turned off. When charging the cart, place the charging cart 23 on the right side of the wireless receiver 11. After manually combining the magnetic absorption joint part and the power switch 24 of the charging cart with the magnetic absorption joint part 19 for charging, press the start charging button 15. After the timer of the receiver microcontroller 36 is started, the controllable energized coil 35 is energized, the magnetic absorption of the cart is fixed in position, and the stem of the button is stretched. At this time, the charging interface 28 compresses the charging interface probe 18 and makes a contact connection. Since the stem of the button is stretched, the power switch of the cart is turned off, and the cart is powered off and cannot move forward, and charging of the cart starts. A super capacitor bank is set inside the cart as the energy storage device of the cart. When the timing time is up, the timer is turned off, the controllable energized coil 35 is powered off, the magnetic attraction disappears, the stem of the button retracts, the power switch of the cart is turned on, and the cart moves forward on the runway until the electric energy is exhausted.

[0094] The function of the above-mentioned timing display device 14 is to display the remaining time in seconds when the charging cart 23 is charging.

[0095] In the above system, the wireless transmitter controller connects the JDY-40 wireless serial module to its serial port 1, and packs and sends the collected data through the wireless module. The wireless receiver connects the JDY-40 wireless serial module to its serial port 2, and the wireless IDs, device IDs, and channel settings of the JDY-40 wireless serial modules 1 and 2 are the same. At this time, the wireless receiver will read and identify the data sent by the wireless transmitter, and then aggregate the data collected by the wireless receiver and send it out again through the Bluetooth module connected to the serial port of the wireless receiver controller. After the Bluetooth module at the host computer end is paired with the Bluetooth module at the device end, the host computer end can receive all the data at the device end, read and identify whether it is a valid signal. If it is valid, the data in the serial port is read and stored and visualized, and the visualization method is selected according to the predetermined settings, and then the comprehensive processing operation of the data is performed, and the processed data is displayed on the display according to the set visualization method. The host computer end can set the charging time, send the set time value to the receiving end microcontroller through the Bluetooth module, and modify the set value of the timer in the microcontroller.

[0096] When the trainee needs to conduct a comparative experiment on the isolated DC-DC drive circuit, install the wireless transmitter 4, the wireless receiver 11, and the trolley test system on the combined components of the bottom plate 25. Power the wireless transmitter of the device through the power interface 2 and the power cord 1. Select the DC-DC drive circuit module 20 required for the experiment, and then turn on the power switch 3 of the wireless transmitter and the power switch 13 of the wireless receiver controller. Observe and record the input current, input power, output short-circuit current, output open-circuit voltage, and output power data through the wireless transmitter display module 7 and the wireless receiver display module 17, and then replace another DC-DC drive circuit module 20 and repeat the above experimental steps.

[0097] The present invention also proposes a method for comparing isolated DC-DC drive circuits, including the following steps:

[0098] Step 1: First, place the bottom plate on the test bench, install the wireless transmitter and the wireless receiver on the bottom plate, and power the wireless transmitter.

[0099] Step 2: Select the DC-DC drive circuit module to be used and install it at the installation position of the wireless transmitter by magnetic attraction.

[0100] Step 3: Power the wireless transmitter with a power cord, install a battery on the wireless receiver, and turn on the power switch of the wireless receiver controller and the power switch of the wireless transmitter.

[0101] Step 4: Use the wireless transmitter display device and the wireless receiver display device to read the experimental result parameters.

[0102] Step 5: Pair the Bluetooth device of the experimental training equipment at the host computer side and set the charging time.

[0103] Step 6: Place the charging cart at the charging position, press the charging timing button to charge the cart. After the time is up, the cart will move forward automatically. Wait for the cart to stop and then read the forward distance of the cart through the scale.

[0104] Step 7: Conduct data analysis on the host computer and save it.

[0105] Step 8: Press the timing clear button and replace the DC-DC drive circuit module. Repeat Steps 4 to 6 until all four drive circuits have been tested.

[0106] Step 9: Use the host computer to set the data curve to be generated, observe the efficiency curve, and compare the output current and output power of the transmitting end and the open-circuit voltage, short-circuit current, and input power of the receiving end under four module states.

[0107] Step 10: Record the efficiency curve and experimental data.

[0108] Step 11: Turn off the power switch of the wireless transmitting end and the power switch of the microcontroller of the wireless receiving end, and take out the battery of the wireless receiving end.

[0109] Step 12: Unplug the DC-DC drive circuit module from the wireless transmitting end, unplug the wireless transmitting end and the wireless receiving end from the base plate, and save all the equipment.

[0110] Specifically, if it is necessary to actually observe the benefits of different DC-DC drive circuit modules, the charging cart 23 can be placed at the starting point of the track and its charging cart magnetic attraction is combined with the joint part and the power switch 24 and the charging magnetic attraction joint component 19. The timing device is cleared and timed through the charging timing button 15. Press the charging button 15 to charge the charging cart 23. After reaching the preset charging time, the charging cart 23 will automatically be powered on and move forward, making the charging cart 23 move forward on the track until the electric energy of the cart is exhausted and stops. The trainee observes and records the farthest distance traveled through the scale 26. Then clear the timing device, replace another DC-DC drive circuit module 20 and repeat the above experimental steps. And the experimental result data can be comprehensively calculated and analyzed on the PC-side software to generate relevant curves or data tables corresponding to the experimental purpose.

[0111] After the experiment, the trainee saves or prints the PC data, turns the power switch 13 of the microcontroller to the off position, turns the power switch 3 of the wireless transmitting end to the off position, unplug the power cord 1 and the DC-DC drive circuit module 20, and remove and save the wireless transmitting end 4, the wireless receiving end 11 and the cart test system from the base plate 25.

[0112] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An isolation type DC-DC drive circuit comparison experiment device, characterized in that: It includes an independently set wireless transmitter, a wireless receiver, a DC-DC drive circuit module, a charging cart test terminal, and a host computer terminal. During the experiment, the DC-DC drive circuit module is set inside the wireless transmitter, and the wireless transmitter, the wireless receiver, and the charging cart test terminal all send data to the host computer terminal; The wireless transmitter includes a power interface, a wireless transmitter power switch, module interface pins, a module magnetic absorption combined component, a wireless transmitter display module, a wireless transmitter combined component, a transmitting coil, a wireless receiver microcontroller, a wireless serial port module, a first current detection module, and a drive signal module, where The power interface is set on the left side of the wireless transmitter, and a power cord can be inserted into the power interface to supply power to the device; The module magnetic absorption combined component is set on the upper surface of the wireless transmitter, including four cylindrical or square grooves containing first magnetic parts; The module interface pins are set on the upper surface of the wireless transmitter, including two columns and six rows of metal contact retractable pins; The wireless transmitter combined component is set on the bottom surface of the wireless transmitter, and is a cylindrical or square convex structure; The wireless transmitter power switch is installed on the right side of the power interface; The transmitting coil is fixed on the right side of the wireless transmitter by pasting; The wireless transmitter microcontroller, the wireless serial port module, the first current detection module, and the drive signal module are concentrated on the wireless transmission main control board and placed inside the wireless transmitter; The wireless receiver includes a receiving coil, a microcontroller battery compartment, a microcontroller switch, a timing display device, a charging timing button, a wireless receiver combined component, a receiver display module, a charging interface pin, a charging magnetic absorption combined component, a power-on controllable coil, a receiver microcontroller, a voltage detection module, a second current detection module, a serial port and Bluetooth communication module, a rectification module, The transmitting coil is fixed on the left side of the wireless transmitter by pasting; The microcontroller charging compartment is located at the central bottom of the rear side of the wireless receiver; The microcontroller switch is located on the left side of the microcontroller charging compartment; The charging magnetic absorption combined component is located on the right side of the wireless receiver, and is two cylindrical or square grooves, and a power-on controllable coil is provided at the end of the groove; The wireless receiver combined component is set on the bottom of the wireless receiver, and is a cylindrical or square convex structure; The charging interface pins are set in the center of the charging magnetic absorption combined component, and are two columns and six rows of non-retractable cylindrical metals; The receiver display module and the timing display device are set on the front of the wireless receiver, and the charging timing button is located on the right side of the timing display device; The wireless receiver microcontroller, the voltage detection module, the second current detection module, the serial port and Bluetooth communication module, and the rectification module are concentrated on the wireless reception main control circuit board and placed inside the wireless receiver; The charging cart test terminal includes a charging cart and a bottom plate, where The charging cart includes a charging magnetic absorption combined component and a power switch, which are located on the left side of the cart, and the position and shape are convex components corresponding to the charging magnetic absorption combined component; The charging interface is two columns and six rows of non-retractable cylindrical metals located in the center of the charging magnetic absorption combined component and the power switch; The bottom plate includes a measuring scale, a runway baffle, a wireless transmitting end bonding component, and a wireless receiving end bonding component. The side where the 0 scale of the scale is located is the right side perpendicular to the bottom plate of the wireless receiving end. The scale values are engraved on both sides of the bottom plate. The ultrasonic sensor is located at the right end of the bottom plate and is fixed on the outside of the runway baffle. The wireless transmitting end bonding component is 4 concave components, whose positions and shapes correspond to those of the wireless transmitting end bonding component. The wireless receiving end bonding component is 4 concave components, whose positions and shapes correspond to those of the wireless receiving end bonding component; The charging cart is charged regularly through the wireless receiving end. After the charging is completed, the cart is driven to move forward on the bottom plate. The experimental results are compared by the control variable method, and the results are visually observed through the traveling distance of the cart in the test system.

2. The comparative experiment device of an isolated DC-DC drive circuit according to claim 1, characterized in that: The receiving coil and the transmitting coil are single-layer coils with a diameter of 10 CM wound in a spiral manner from the inside to the outside using enameled wire with a wire diameter of 2.0, and the distance between the two coils is 4 CM.

3. An isolation type DC-DC drive circuit comparison experiment device according to claim 1, characterized in that: The DC-DC drive circuit module includes a module interface, a module magnetic attraction bonding component and electronic components of the corresponding circuit. The module interface is located at the bottom of the DC-DC drive circuit module and is an inextensible cylindrical metal with two columns and six rows. The module magnetic attraction bonding component is located at the bottom of the DC-DC drive circuit module and is a convex component containing a second magnetic part whose position and shape correspond to those of the module magnetic attraction bonded component.

4. An isolation type DC-DC drive circuit comparison experiment device according to claim 1, characterized in that: For the wireless transmitting end main control board, the drive signal module is connected to the module interface pin, the wireless serial port module is connected to the serial port pin of the transmitting end microcontroller, the first current detection module is connected to the AD conversion pin of the transmitting end microcontroller, and the wireless transmitting end display module is connected to the general IO output pin of the transmitting end microcontroller.

5. The comparative experiment device of an isolated DC-DC drive circuit according to claim 3, wherein: For the wireless receiving end main control board, the rectification module is connected to the receiving coil. The transmitting end and the receiving end of the ultrasonic module located on the bottom plate are respectively connected to the AD output and input pins of the receiving end microcontroller. The voltage dividing type voltage detection module is connected to the AD conversion pin of the receiving end microcontroller. The second current detection module is connected to the AD conversion pin of the receiving end microcontroller. The serial port and Bluetooth communication module is connected to the serial port pin of the receiving end microcontroller. The receiving end display module, the charging timing display device and the charging timing button are connected to the general IO pins of the receiving end microcontroller.

6. The comparative experiment device of an isolated DC-DC drive circuit according to claim 5, characterized in that: The charging timing display device is used to display the remaining time when the charging cart is charging, and the unit is seconds.

7. A method of comparison using the isolated DC-DC drive circuit comparison experiment device according to any one of claims 1-6, characterized in that: Specifically, it includes the following steps: Step 1: First, place the bottom plate on the test bench, install the wireless transmitting end and the wireless receiving end on the bottom plate, and supply power to the wireless transmitting end; Step 2: Select the DC-DC drive circuit module to be used and install it at the installation position of the wireless transmitting end by magnetic attraction; Step 3: Supply power to the wireless transmitting end with a power cord, install a battery on the wireless receiving end, and turn on the power switch of the wireless receiving end controller and the power switch of the wireless transmitting end; Step 4: Use the wireless transmitting end display device and the wireless receiving end display device to read the experimental result parameters; Step 5: Pair the Bluetooth device of the experimental training equipment at the upper computer end and set the charging time; Step 6: Place the charging cart at the charging position, press the charging timer button to charge the cart. After the time is up, the cart will move forward automatically. After the cart stops, read the forward distance of the cart through the scale; Step 7: Conduct data analysis on the host computer and save it; Step 8: Press the timing clear button and replace the DC-DC drive circuit module. Repeat steps 4 to 6 until the tests of all four drive circuits are completed; Step 9: Use the host computer to set the data curve to be generated, observe the efficiency curve, and compare the output current and output power of the transmitting end and the open-circuit voltage, short-circuit current, and input power of the receiving end under the four module states; Step 10: Record the efficiency curve and experimental data; Step 11: Turn off the power switch of the wireless transmitting end and the power switch of the microcontroller of the wireless receiving end, and take out the battery of the wireless receiving end; Step 12: Unplug the DC-DC drive circuit module from the wireless transmitting end, unplug the wireless transmitting end and the wireless receiving end from the base plate, and save all the equipment.

Images