This topic is derived from a project commissioned by an enterprise: the development of a high-power two-level vector control inverter. The topic aims at the product development of the induction motor variable frequency speed regulation system, and studies and tests the offline identification technology and controller of the induction motor parameters. In addition to participating in the design and production of the overall system, I independently completed the offline parameter identification work. The article introduces a practical offline parameter identification method, and provides a set of digital solutions based on DSP based on the comprehensive control strategies. The software and hardware debugging of the whole machine is carried out to achieve the design goals. Lay a certain foundation for productization. Chapter 1 of the paper introduces vector control and coordinate transformation, analyzes the influence of motor parameters on vector control, and simulates the influence of motor parameter changes on the inverter output through Matlab. Chapter 2 mainly introduces the algorithm of parameter identification, simplifies the static mathematical model of the induction motor, and obtains the relationship equation between each parameter and voltage and current. The motor parameters are identified through single-phase DC test and single-phase AC test. The numerical value of the nonlinear equation is calculated by iterative algorithm, and a method for calculating the motor power factor based on the instantaneous value of voltage and current is also introduced. Chapter 3 studies the controller and reviews the current more advanced control strategies such as self-disturbance rejection control, adaptive control, and nonlinear inverse control. Finally, the indirect vector control system based on the PI speed regulator is simulated and the simulation results are given. Chapter 4 introduces the universal AC speed regulation test device independently developed by the laboratory based on TI\'s DSP TMS320F2812. According to the design requirements of the universal test device, the control board circuit, power board circuit, power board circuit and other circuits were designed, debugged, and applied to the test, and the performance met the requirements. Chapter 5 introduces the functional software design and functional test results of the entire system, and gives some program flow charts and basic functional test waveforms of the device. Finally, an overall summary of the research on the subject is made, and suggestions are put forward for future follow-up research.
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