Combined power electronic experiment device

Abstract

The utility model relates to the technical field of teaching aids, and provides a combined power electronic experiment device, which comprises a fixed part and a combined part, and is characterized in that the fixed part comprises a driving power supply and a control module which are electrically connected with each other; the combined part comprises a track and a plurality of functional modules, the track is provided with a plurality of mounting positions, the functional modules are detachably matched with the mounting positions respectively, the functional modules comprise a half-bridge module, a capacitor module, an inductor module and a load module, and the control module is electrically connected with the half-bridge module; through the combination of the plurality of function modules, a plurality of circuit topology structures are simulated. According to the utility model, problems that a conventional power electronic experiment device is single in function, insufficient in flexibility, high in cost and difficult to adapt to various circuit construction requirements are solved.

Description

Technical Field

[0001] This utility model relates to the field of educational demonstration equipment technology, specifically to a combined power electronics experimental device. Background Technology

[0002] Power electronics technology, as a core pillar of modern power systems and new energy technologies, is becoming increasingly important in modern scientific and industrial development. This field not only encompasses the entire process from efficient energy conversion and transmission to precise control, but also profoundly impacts the development of several key areas such as smart grids, electric vehicles, and renewable energy generation. Therefore, the continuous progress and innovation of power electronics technology plays a crucial role in promoting energy transition, improving energy efficiency, and achieving sustainable development goals.

[0003] In the research, teaching, and experimentation of power electronics technology, constructing and testing various types of circuits is an indispensable part of verifying the correctness of theories, optimizing design schemes, and evaluating system performance. These circuits include, but are not limited to, DC-DC converters (such as Buck circuits, Boost circuits, Buck-Boost circuits, etc.) used to achieve voltage boosting and deboosting; DC-AC inverters (single-phase inverters and three-phase inverters) used to convert DC power into AC power to meet the needs of different loads; and AC-DC rectifiers (single-phase rectifiers and three-phase rectifiers) used to efficiently convert AC power into DC power and have the ability to control current waveforms.

[0004] However, traditional power electronics experimental setups often suffer from limitations in design, such as limited functionality and insufficient flexibility. These setups are typically configured only for specific circuit types or experimental needs; once a different type of circuit needs to be tested, the entire setup must be replaced or complex adjustments must be made. This limitation not only significantly reduces the flexibility and efficiency of experiments but also increases the cost and time required.

[0005] Furthermore, with the rapid development of power electronics technology, new circuit topologies are constantly emerging, placing increasingly higher demands on experimental setups. Traditional experimental setups often struggle to adapt to these new requirements, failing to provide sufficient flexibility and scalability to support the construction and testing of new circuits.

[0006] Therefore, developing a power electronics experimental device that can flexibly adapt to various circuit construction needs, is easy to expand and upgrade, and is cost-effective is of great significance for promoting the continuous progress and innovation of power electronics technology. Such a device can not only meet the basic needs of teaching and research, but also provide strong support for the practical application of power electronics technology. Utility Model Content

[0007] Based on the above description, this utility model provides a combined power electronics experimental device to solve at least one of the problems of traditional power electronics experimental devices, such as limited functionality, insufficient flexibility, high cost, and difficulty in adapting to various circuit construction requirements.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A combined power electronics experimental device, comprising a fixing part and a combining part; wherein:

[0009] The fixing part includes a drive power supply and a control module that are electrically connected to each other;

[0010] The assembly includes a track and multiple functional modules. The track has multiple mounting positions, and the various functional modules are detachably coupled to the mounting positions. The various functional modules include a half-bridge module, a capacitor module, an inductor module, and a load module. The control module is electrically connected to the half-bridge module.

[0011] By combining multiple of the aforementioned functional modules, various circuit topologies can be simulated.

[0012] Compared with existing technologies, the technical solution of this application has the following beneficial technical effects: The device provided by this utility model can select corresponding functional modules according to experimental needs to quickly build complex circuit structures. For example, in teaching demonstration scenarios, various functional modules can be detachably and freely combined on the track to flexibly simulate various circuit topologies, making the teaching demonstration effect more intuitive; in practical examination scenarios, it can test students' proficiency in various circuit topologies; in scientific research scenarios, it can also expand and verify new circuit topologies through the device provided by this utility model. The device provided by this utility model can simulate multiple circuit topologies with one device, which can improve the flexibility, fun, and efficiency of teaching experiments and reduce the overall cost of teaching demonstration devices. Due to the modular design, each functional module can be upgraded and maintained independently, thus greatly extending the life cycle of the entire experimental device.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, adjacent to the track are also provided a main power interface and a load interface. The main power interface includes an AC power interface and a DC power interface. The main power interface is located at one end of the track, and the load interface is located at the other end of the track.

[0015] Furthermore, a circuit breaker is also provided on the track at one end near the main power interface.

[0016] Furthermore, the various circuit topologies include Buck converters, Boost converters, Buck-Boost converters, bidirectional DC-DC converters, single-phase inverters, three-phase inverters, single-phase PWM rectifiers, and three-phase PWM rectifiers.

[0017] Furthermore, the functional module is equipped with a standard interface, and when constructing the circuit topology, multiple standard interfaces are detachably connected through plug wires that match the standard interfaces.

[0018] Furthermore, the functional module is provided with an installation structure, which is detachably coupled with the track.

[0019] Furthermore, the mounting structure may be a clamp, a buckle, a bolt, a mounting groove, or a mounting hole.

[0020] Furthermore, the functional module is equipped with indicator lights. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the connection between the switching devices, control module, and drive power supply in the half-bridge module of the present invention.

[0022] Figure 2(a) is a schematic diagram of the main circuit topology of a Buck converter provided in a certain embodiment, and Figure 2(b) is a schematic diagram of the combination of various modules of a Buck converter provided in a certain embodiment.

[0023] Figure 3(a) is a schematic diagram of the main circuit topology of a Boost converter provided in a certain embodiment, and Figure 3(b) is a schematic diagram of the combination of modules of a Buck converter provided in a certain embodiment.

[0024] Figure 4(a) is a schematic diagram of the main circuit topology of a Buck-Boost converter provided in a certain embodiment, and Figure 4(b) is a schematic diagram of the combination of various modules of a Buck-Boost converter provided in a certain embodiment.

[0025] Figure 5(a) is a schematic diagram of the main circuit topology of a bidirectional DC-DC converter provided in a certain embodiment, and Figure 5(b) is a schematic diagram of the combination of modules of a bidirectional DC-DC converter provided in a certain embodiment.

[0026] Figure 6(a) is a schematic diagram of the main circuit topology of a single-phase inverter provided in a certain embodiment, and Figure 6(b) is a schematic diagram of the combination of modules of a single-phase inverter provided in a certain embodiment.

[0027] Figure 7(a) is a schematic diagram of the main circuit topology of a three-phase inverter provided in a certain embodiment, and Figure 7(b) is a schematic diagram of the combination of modules of a three-phase inverter provided in a certain embodiment.

[0028] Figure 8(a) is a schematic diagram of the main circuit topology of a single-phase PWM rectifier provided in a certain embodiment, and Figure 8(b) is a schematic diagram of the combination of modules of a single-phase PWM rectifier provided in a certain embodiment.

[0029] Figure 9(a) is a schematic diagram of the main circuit topology of a three-phase PWM rectifier provided in a certain embodiment, and Figure 9(b) is a schematic diagram of the combination of modules of a three-phase PWM rectifier provided in a certain embodiment. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0033] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0035] Based on the defects pointed out in the background technology, combined with Figure 1 Figure 9 illustrates a combined power electronics experimental device, comprising a fixing part and a combining part; wherein:

[0036] The fixing part includes a drive power supply and a control module that are electrically connected to each other;

[0037] The assembly includes a track and multiple functional modules. The track has multiple mounting positions, and the various functional modules are detachably coupled to the mounting positions. The various functional modules include a half-bridge module, a capacitor module, an inductor module, and a load module. The control module is electrically connected to the half-bridge module.

[0038] By combining the half-bridge module, capacitor module, inductor module, and load module, various circuit topologies can be simulated.

[0039] The combined power electronics experimental device provided in this embodiment integrates various discrete components, including controllable switching devices (such as MOSFETs or IGBTs, with MOSFETs being used as an example below), inductors, capacitors, and resistors, into multiple independent functional modules. For example, the upper and lower transistors of a half-bridge module are each a MOSFET, and these functional modules can be freely combined and installed on a track. This design allows the power line to flexibly connect multiple discrete functional modules through the main circuit interface to construct the required main circuit path; simultaneously, the control signal line is connected to the control module and the control terminals of the power electronic devices through the control signal interface, achieving efficient signal transmission.

[0040] The mounting section can also be fixed using a track, mounting the control module and drive power supply on a dedicated track. In practical use, appropriate functional modules can be selected according to experimental needs to quickly build complex circuit structures. For example, in teaching demonstration scenarios, various functional modules can be detachably and freely combined on the track to flexibly simulate various circuit topologies, making the teaching demonstration more intuitive. In practical examination scenarios, it can test students' proficiency in various circuit topologies. In scientific research scenarios, the device provided by this invention can also be used to expand and verify new circuit topologies. The device provided in this embodiment can simulate multiple circuit topologies with a single device, improving the flexibility, interest, and efficiency of teaching experiments while reducing the overall cost of the teaching demonstration device. Because the modular design allows each functional module to be upgraded and maintained independently, the lifespan of the entire experimental device is greatly extended.

[0041] The preferred power supply is a DC 24V power supply, which can serve as both the operating power for the control module and the drive source for the half-bridge module. The control module can be implemented using a microcontroller or a DSP. Figure 1 The diagram shows the electrical connection between the control module and the half-bridge module. The control module is connected to the control terminal of the half-bridge module, such as the gate of a MOSFET, via a drive circuit. The control module outputs control signals to the drive circuit, and the drive circuit sends corresponding drive signals to the gates of the MOSFETs according to the control signals, thereby controlling the on / off state of each MOSFET in the half-bridge module. In practical applications, the body diode of the MOSFET can also be used as a diode by changing the wiring method of the MOSFET in the half-bridge module. Preferably, the drive circuit can be integrated with the control module, with the power supply of the fixed part providing operating power to both the control module and the drive module; alternatively, the MOSFET can be integrated with a dedicated drive circuit, and... Figure 1 The diagram shows the reserved main circuit connection port and control signal connection port.

[0042] The following examples, in conjunction with Figures 2 to 9, illustrate the application of this device using several possible circuit topology embodiments. Specifically, for various power electronic converters such as Buck converters, Boost converters, Buck-Boost converters, bidirectional DC-DC converters, single-phase inverters, three-phase inverters, single-phase PWM rectifiers, and three-phase PWM rectifiers, although their main circuit topologies have their own characteristics, they can all be modularly constructed using the combined power electronic experimental device proposed in this utility model.

[0043] Figure 2(a) shows the main circuit topology of the Buck converter, and Figure 2(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 2(a). Combining Figures 2(a) and 2(b), the Buck converter can be constructed by mounting one half-bridge module (where the lower transistor remains off, and only its body diode conducts electricity), one inductor module, and one capacitor module on a rail, for DC-DC buck conversion. The resistor R in Figure 2(a) can be implemented using a single resistor module mounted on the rail.

[0044] Figure 3(a) shows the main circuit topology of the Boost converter, and Figure 3(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 3(a). Combining Figures 3(a) and 3(b), the Boost converter can be constructed by mounting one half-bridge module (where the upper transistor remains off, using only its body diode), one inductor module, and one capacitor module on a rail, for DC-DC boost conversion. The resistor R in Figure 3(a) can be implemented using a single resistor module mounted on the rail.

[0045] Figure 4(a) shows the main circuit topology of the Buck-Boost converter, and Figure 4(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 4(a). Combining Figures 4(a) and 4(b), the Buck-Boost converter can be constructed by mounting one half-bridge module, one inductor module, and one capacitor module on a rail, for DC-DC buck-boost conversion. The resistor R in Figure 4(a) can be implemented using a single resistor module mounted on the rail.

[0046] Figure 5(a) shows the main circuit topology of the bidirectional DC-DC converter, and Figure 5(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 5(a). Combining Figures 5(a) and 5(b), the bidirectional DC-DC converter can be constructed by mounting one half-bridge module (with the upper and lower transistors working alternately) and one inductor module on a rail, for bidirectional DC-DC conversion. The resistor R in Figure 5(a) can be implemented using a single resistor module mounted on the rail.

[0047] Figure 6(a) shows the main circuit topology of a single-phase inverter, and Figure 6(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 6(a). Combining Figures 6(a) and 6(b), a single-phase inverter can be constructed by mounting two half-bridge modules and one inductor module on a rail. The resistor R in Figure 6(a) can be implemented using a single resistor module mounted on the rail, used to convert DC power into AC power.

[0048] Figure 7(a) shows the main circuit topology of the three-phase inverter, and Figure 7(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 7(a). Combining Figures 7(a) and 7(b), the three-phase inverter circuit can be constructed by mounting three half-bridge modules and three inductor modules on a rail. The three resistors R in Figure 7(a) can be implemented using three resistor modules mounted on the rail. This three-phase inverter is used to convert DC power into three-phase AC power.

[0049] Figure 8(a) shows the main circuit topology of a single-phase PWM rectifier, and Figure 8(b) is a schematic diagram of the combination of functional modules within the dashed box in Figure 8(a). Combining Figures 8(a) and 8(b), the main circuit of the single-phase PWM rectifier consists of two half-bridge modules, one inductor module, and one capacitor module mounted on a rail. The resistor R in Figure 8(a) can be implemented using a single resistor module mounted on the rail to achieve PWM rectification from AC to DC.

[0050] Figure 9(a) shows the topology of the three-phase PWM rectifier main circuit, and Figure 9(b) is a schematic diagram of the combination of each functional module within the dashed box in Figure 9(a). Combining Figures 9(a) and 9(b), the three-phase PWM rectifier main circuit consists of 3 half-bridge modules, 3 inductor modules, and 1 capacitor module. The resistor R in Figure 9(a) can be implemented using a single resistor module mounted on the rail to achieve PWM rectification of three-phase AC to DC.

[0051] To construct a complete experimental setup, adjacent tracks are also equipped with a main power interface and a load interface. The main power interface includes an AC power interface and a DC power interface for connecting to an external AC / DC power supply. The load interface is used to connect a resistor module or an external resistor according to usage requirements. The main power interface is located at one end of the track, and the load interface is located at the other end of the track. For example, if the track is horizontally oriented, the main power interface is located at the left end of the track, and the load interface is located at the right end; or, the main power interface is located at the right end of the track, and the load interface is located at the left end of the track. Since the resistor R is located at the end furthest from the main power supply in the circuit topology shown in Figures 2-9, the main power interface and the load interface are positioned far apart from each other along the length of the track. This facilitates the installation of other functional modules besides the resistor module on the track, and the resistor module is installed last, improving the efficiency of circuit assembly.

[0052] In order to provide power supply protection for the device during the experiment, a circuit breaker can also be installed on the track at one end near the main power interface. The circuit breaker is installed on the track as a functional module and connected in series in the circuit.

[0053] Taking the modular combination of the three-phase inverter shown in Figures 7(a) and 7(b) as an example, the construction and testing of the three-phase inverter circuit can be easily realized by reasonably selecting and configuring the above basic functional units.

[0054] Specifically, the main circuit topology of the three-phase inverter is shown in Figure 7(a). Based on the functional characteristics and design optimization principles, the three-phase inverter circuit can be decomposed into the following key modules: (1) three independent half-bridge circuit modules, each half-bridge module is responsible for the output control of one phase; (2) three inductor modules, which correspond to the filter inductors in the three-phase circuit respectively; (3) a circuit breaker module, which is used for the safety protection of the entire system and the circuit on / off control; (4) a core main circuit control module, which is responsible for receiving external instructions and sending control signals to the controllable switching transistors of each half-bridge module through the control signal interface to achieve precise control of the circuit.

[0055] In one possible implementation, each functional module is equipped with a standard interface, and when constructing the circuit topology, multiple standard interfaces are detachably connected to each other via plug-in cables that match the standard interfaces. The plug-in cables can be configured as wire harnesses with plug terminals, depending on functional requirements, to facilitate connection and disconnection from the standard interfaces.

[0056] In one possible implementation, each functional module is provided with a mounting structure that detachably engages with the track. Specifically, the mounting structure can take the form of clamps, buckles, bolts, mounting grooves, or mounting holes to connect with the track. For example, a standard interface is provided on the side of each functional module facing the operator to facilitate electrical connection between modules; a through-groove is provided on the side of each functional module away from the operator. The groove serves as a mounting groove, and its shape / size is adapted to the track. By fitting the groove onto the outer periphery of the track, the functional module can be installed on the track, and the installed functional module can slide along the length of the track to adjust its position and meet electrical safety distance requirements.

[0057] In one possible implementation, indicator lights are provided on some or all functional modules to provide a visual display of the working status of each kinetic energy module, such as whether it is connected to a circuit.

[0058] As a preferred embodiment, the switching device in the half-bridge module can be a silicon carbide MOSFET, which has no reverse recovery time, does not withstand reverse recovery spikes, has lower current stress, improved reliability, and lower losses, enabling higher-speed switching. The silicon carbide MOSFET is pressed onto an aluminum profile heat sink and shielded with a protective cover to prevent it from flying and causing injury in the event of device failure.

[0059] This utility model provides a combined power electronics experimental device, which achieves flexible combination and efficient construction of circuits through the following key innovations:

[0060] 1. Modular Design: The core innovation of the device lies in its unique modular design. Each module contains specific power electronic components (such as switching transistors, resistors, inductors, capacitors, etc.) as well as necessary interfaces and connection points. These modules can be freely combined like building blocks, allowing for the selection of appropriate modules according to experimental needs, and the rapid construction of complex circuit structures. This design not only improves the flexibility of experiments but also significantly reduces the cost of the experimental device.

[0061] 2. Standardized Interface: To ensure seamless connection between modules, this invention adopts a standardized interface design. Each module is equipped with a standardized connector and interface, making the connection between modules simple and reliable. This design not only simplifies the connection process between modules but also improves the stability and reliability of the system. Furthermore, the standardized interface facilitates module interchangeability, allowing users to easily replace or upgrade modules to adapt to different experimental needs.

[0062] 3. Comprehensive Circuit Support: Through ingenious module combination and control system configuration, this invention can support the construction and testing of various power electronic circuits, including but not limited to Buck converters, Boost converters, Buck-Boost converters, bidirectional DC-DC converters, single-phase / three-phase inverters, and single-phase / three-phase PWM rectifier converters. This comprehensive circuit support enables this invention to meet the needs of various power electronic experiments, providing strong support for teaching and research.

[0063] 4. Easy to expand and upgrade: Due to its modular design, the experimental device of this invention can easily add new functional modules to adapt to future developments in power electronics technology. Furthermore, the modular design allows each module to be upgraded and maintained independently, thus greatly extending the overall lifespan of the experimental device.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined power electronics experimental device, characterized in that, It includes a fixing part and a assembly part, wherein: The fixing part includes a drive power supply and a control module that are electrically connected to each other; The assembly includes a track and multiple functional modules. The track has multiple mounting positions, and the various functional modules are detachably coupled to the mounting positions. The various functional modules include a half-bridge module, a capacitor module, an inductor module, and a load module. The control module is electrically connected to the half-bridge module. By combining multiple of the aforementioned functional modules, various circuit topologies can be simulated.

2. The combined power electronics experimental device according to claim 1, characterized in that, The adjacent track is also provided with a main power interface and a load interface. The main power interface includes an AC power interface and a DC power interface. The main power interface is located at one end of the track, and the load interface is located at the other end of the track.

3. The combined power electronics experimental device according to claim 2, characterized in that, A circuit breaker is also installed on the track at the end near the main power interface.

4. The combined power electronics experimental device according to claim 1, characterized in that, The various circuit topologies include Buck converters, Boost converters, Buck-Boost converters, bidirectional DC-DC converters, single-phase inverters, three-phase inverters, single-phase PWM rectifiers, and three-phase PWM rectifiers.

5. The combined power electronics experimental device according to claim 1, characterized in that, The functional module is equipped with a standard interface. When constructing the circuit topology, multiple standard interfaces are detachably connected through plug wires that match the standard interfaces.

6. The combined power electronics experimental device according to claim 1, characterized in that, The functional module is equipped with an installation structure, which is detachably fitted with the track.

7. A combined power electronics experimental device according to claim 6, characterized in that, The mounting structure includes clamps, buckles, bolts, mounting grooves, or mounting holes.

8. The combined power electronics experimental device according to claim 1, characterized in that, The functional module is equipped with indicator lights.

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