A new hybrid current controller for single-phase rectifier and DSP implementation |
Posted on:2005-11-15 | Degree:M.Sc | Type:Thesis |
University:University of Alberta (Canada) | Candidate:Zhang, Hao | Full Text:PDF |
GTID:2452390008483059 | Subject:Engineering |
Abstract/Summary: | |
A new hybrid carrier-based current controller is described for single-phase PWM rectifiers. It combines the functionality of both hysteresis-based and carrier-based current controllers. The development of this current controller is described with the aid of generic PWM controllers that use a sinusoidal modulating signal and a signal integrator.; The resultant current controller is relatively insensitive to variations in rectifier parameters such as the supply inductance and the DC link voltage magnitude, and has the following features: constant switching frequency; a near zero current-error over a PWM half cycle; no skewing effects in the current-error signal; excellent current wave shaping capability; real-time generation of the sinusoidal amplitude modulation signal from the PWM signal; elimination of phase-shifts caused by the limited rate-of-change of the rectifier current.; A DSP controller ADSP-21992 is used to execute the control algorithm and generate the PWM switching signals based on the feedback signals applied to the DSP ADC port to drive the single-phase rectifier. |
Keywords/Search Tags: | Current controller, Rectifier, Single-phase, New hybrid, Signal |
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