The Design Of Inverters Based On The Robust Control Technology

The application of the DC/AC inverter got more and more popular in the department of aviation、industry、correspondence and so on,power quality provided by traditional analogical inverter could not satisfied the needs of practice gradually.In order to obtaining the high grade power quality, this paper studied the drawback and difficulties of the presenting inverter power system, for example, the phase differences existing between the feedback signal and the given signal; output harmonic increased because of wide load changing, applied the new type control technology and digital signal processing to the design of the control system for the inverter power, and achieved the satisfied result. The process of designation is in details as follows:Firstly, based on studying the principle of three typical inverter topologies and combined the practice needs, this paper proposed the system overall scheme of designation which the first-class DC / DC used parallel ways after tandem, the lasted-class DC/AC used robust control strategy. Computed and chose the main devices of the power electric circuit.Secondly, we imposed the H∞control technology into the designing of the inverter’s controller based on the main circuit designed by myself. When we designed the single-loop voltage controller, we made tracking the sine wave as the last control objectives instead to the response indicators of step pulse, which solved the problem of phase difference between the reference input and the output. Using the simulation software-Saber、Mat lab to simulated the circuit of DC/DC、DC/AC.Lastly, expatiated the application on controller using DSP including peripheral circuit designing of DSP hardware, overall structure designing of software and the associated waveforms designed by software.