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A general constant-frequency pulsewidth modulator and its applications

A general constant-frequency pulsewidth modulator and its applications,10.1109/81.669061,IEEE Transactions on Circuits and Systems I-regular Papers,Zh

A general constant-frequency pulsewidth modulator and its applications   (Citations: 40)
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Constant-frequency pulsewidth modulation (PWM) is the most frequently used method in the control of switching converters. This paper proposes a general PWM modulator that realizes various control schemes with either trailing-edge or leading-edge modulation. Based on that a general double-edge modulator ran be constructed. The proposed modulator is applied to feedforward control of a family of converters, current-mode control with linear or nonlinear compensating slope, and a family of unity-power-factor rectifiers at continuous or discontinuous conduction mode to demonstrate its generality. Experimental and PSPICE verifications are provided
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    • ...The proposed work relates HPWM with an OCC clamping technique, already considered as a generalized PWM method [9], combining simplicity of both of these PWM methods...

    Alberto Soto-Locket al. A current control implementation based on a clamping one-cycle control...

    • ...In this sense, OCC is considered a generalized (fixed frequency) PWM modulator [14]...
    • ...now bipolar (ac) waves instead of unipolar (dc) modulating waves obtained for OCC controllers [10-14]...
    • ...V [10-24] and some current delay in the control system...
    • ...This is sort of similar to OCC strategy presented for rectifiers [10-14]...

    Alberto S. Locket al. Application of One-Cycle Control to Stator Field-Oriented Control

    • ...In power applications, PWM is the most frequently used method in the control of switching converters [8], in active power filters [9], or to reduce the inverter input current ripples [10]...

    Giuseppe Fedeleet al. Spectral Analysis of a Class of DC–AC PWM Inverters by Kapteyn Series

    • ...Besides that, the One-Cycle Control (OCC) technique [10] provides power factor control, very low distortion, while regulating the output voltage, with a simple circuit...
    • ...Similarly, it can be proved that Area (ΔPQT)=Area (ΔTSU) and so on. This means that the current error area is the same for each half of the current period, which is consistent with Zero Average Current Error (ZACE) control [10]...
    • ...Since in a controlled rectifier with unity power factor the phase currents should follow the phase voltages, the three-phase rectifier impedance seen from the grid side should be resistive [10] a resistance R e is emulated so then |vg|=Re|ig|...

    Alberto Soto Locket al. A hybrid current control for a controlled rectifier

    • ...On the other hand, One-Cycle Control (OCC), has been used to control ac-dc converters (see Fig.1) and can be seen as a generalized form of PWM modulation [6]...
    • ...grid side has to be a resistance R e [6] which is emulated so that [ ] [ ]...

    Alberto Soto Locket al. One Cycle-Control method for obtaining Discontinuous PWM strategies to...

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