MODELING OF HIGH-POWER-FACTOR RECTIFIERS BASED ON SWITCHING CONVERTERS WITH NONLINEAR-CARRIER CONTRO - Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
نویسندگان
چکیده
The paper presents unified modeling and analysis of high-power-factor rectifiers based on switching converters with nonlinear-carrier control (NLC). In NLC control, which offers simple, high-performance power-factor correction (PFC), the switch duty ratio is obtained by comparing a signal derived from the switch current with a periodic nonlinear carrier. A general expression is derived for the required nonlinear carrier waveshape with any PWM switching converter. A unified sampled-data model is used to demonstrate stability of the current loop under all operating conditions. A continuous-time, switching-frequency averaged model is derived to determine the bandwidth of the current loop, and facilitate the input Alter design. A line-frequency averaged model is presented for the purpose of designing the output filter and the voltage-regulating loop. Experimental verification results are described for a 150W flyback rectifier.
منابع مشابه
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In this paper, nonlinear-carrier (NLC) control is proposed for high-power-factor rectifiers based on flyback, Cuk or Sepic converters operated in the continuous conduction mode. In the NLC controller, the switch duty ratio is determined by comparing a signal proportional to the integral of the switch current with a periodic nonlinear carrier waveform. The shape of the NLC waveform is determined...
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