Design of an experimental platform for power conversion and control based on modern power electronic devices. Its design philosophy follows three principles: first, comprehensiveness, which can integrate teaching resources such as automatic control principles, programmable controllers, and electrical engineering. In the experimental platform, it is not only necessary to reflect the practice and application of a single discipline, but also to establish a systematic concept for students and comprehensively apply professional knowledge from multiple disciplines; The second is open, with compatible and upgraded interfaces. When designing the controller unit of the electric energy conversion module in the experimental platform, the expansion and upgrading of the platform should be considered, and interfaces should be reserved for future functional expansion and replacement; The third is modularity, graded modularity, which not only makes the use of device drivers more convenient, but also facilitates maintenance.
The project adopts a modular design method and uses various modern power electronic devices to develop an experimental platform for energy conversion and control. The experimental platform consists of power electronic devices, drive modules, protection modules, pulse width modulation modules, and electrical input and output interface modules. By controlling the output electrical energy parameters, the working characteristics of moving loads such as motors or static loads such as resistance networks can be changed. The power conversion and control platform plays a bridging role between the original power supply and the final load in power electronic application systems, converting the coarse electricity provided by the power supply into refined power that meets the load requirements. Among them, the power quality indicators of precision electricity mainly depend on the characteristics of the power conversion and control platform. The specific indicators of the research results are: the coverage range of modern power electronic devices, including typical representatives of fully controlled, composite, and intelligent power electronic devices, such as MOSFET, IGBT, MCT, IGCT, and IEGT. The functions of the driving and protection circuits of power electronic devices. Due to the fact that power electronic devices control strong electrical energy through weak electrical signals, driving and protection circuits are indispensable components. The experimental platform needs to design driving and protection circuits for each power electronic device, which can achieve the transformation and control of electrical energy. The important application area of this experimental platform is the transformation and control of electrical energy. As an evaluation criterion for the implementation of basic functions, it is to test whether the experimental platform can achieve the transformation and control of electrical energy. The control method of power electronic devices is through PWM pulse sequence control. As a widely applicable and important control method, the PWM pulse sequence generation circuit provides control signals for various devices. Compatibility with existing experimental platforms. The proposed experimental platform has interfaces with active loads and passive loads, which can drive passive loads and active loads, demonstrating flexibility and openness in load matching.

The experimental platform adopts a modular design, which can not only adapt to existing experimental devices, achieve upgrades and improvements to existing experimental devices, but also facilitate further technological upgrades in the future. The main research content includes designing corresponding driving and protection circuits for each type of modern power electronic device selected, including power MOSFET, IGBT, MCT, IGCT, and IEGT. The PWM waveform generation unit is designed with the SG3525 pulse width modulation (PWM) control chip as the core, providing driving waveforms for each driving circuit. Design interface circuits for input, testing, and output of electrical energy. Not only can it achieve matching with external power sources and load interfaces, but it can also detect the form of electrical energy during transformation and control processes. Compatibility design of electrical energy output interface. The electrical energy that has been transformed and controlled includes active loads such as the power grid, as well as passive loads such as electric motors or impedance components. Electromagnetic compatibility design and safety protection design of the experimental platform. On the one hand, it meets the needs of electromagnetic compatibility in laboratory environments, and on the other hand, it ensures the safety protection of personnel and equipment during operation.