Simple pole/zero modelling of conductance controllers

Computer Science – Performance

Scientific paper

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Control Systems Design, Controllers, Electrical Impedance, Pulse Duration Modulation, Current Regulators, Design Analysis, Feedback Control, Systems Analysis

Scientific paper

The design analysis of a PWM (pulse width modulation) conductance controller is expanded to predict certain key performance functions of the regulator. These include the input-to-output voltage susceptibility. Input impedance, closed and open loop response, and output impedance. The method used consists of the derivation of the exact polynomial for each of the functions, including the pole/zero representation of the amplifiers. The functions are analyzed and simplified to derive equivalent pole/zero representations for these functions. The resultant pole/zero representation gives the designer a clearer understanding of the importance of each design parameter on the functions to be analyzed and hence, shows where improved performance can be achieved. A result of this analysis shows that the input impedance of a conductance controlled regulator is damped, in a similar manner to the damping exhibited in the conductance control function.

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