Mor Mordechai Peretz

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—A time-domain design method for the digital controller of pulsewidth modulation dc–dc converters was developed. The proposed approach is based on the fact that the closed-loop response of a digitally controlled system is largely determined by the first few samples of the compensator. This concept is used to fit a digital PID template to the desired(More)
SPICE simulation is already recognized as a viable tool in Power Electronics. Simulation is particularly useful when dealing with a non-linear behavior that cannot be easily handled analytically. Such a case is the analysis of a switching power converter that includes a non-linear inductor that might affect the inrush current, magnitude of the current(More)
A discrete time-domain based system identification method for PWM DC-DC converters is presented. The proposed procedure is capable of successfully reconstructing the system's model from an arbitrary excitation at the command input. In this study, a step perturbation was applied, which is simple to apply and has an intuitive interpretation of the output(More)
—A new self-adjusting current-fed push-pull parallel inverter (SA-CFPPRI) is presented and tested by simulation and experimentally. The power source includes a soft switching control circuitry and a controllable inductor. The SA-CFPPRI can drive a capacitive load at any frequency within the design range. It will maintain zero voltage switching of the main(More)
Resonant converters and related systems, such as piezoelectric transformers, may require a high-resolution frequency drive when the quality factor of the network is high or to avoid limit cycle oscillations. This high frequency resolution requirement could be beyond the capabilities of low cost microcontrollers. To remedy this problem, a frequency(More)
—The conditions for limit-cycle oscillations in digitally controlled resonant converters are explored theoretically and are tested by simulation and experiment. The analytical analysis reveals that in a manner similar to digital pulsewidth modulation (PWM) control, limit cycles occur in such systems when the LSB of the control changes the output by a value(More)
The closed loop response of voltage feedback converters was reexamined theoretically and tested by simulations and experiments. It was found that the classical second order representation of the closed loop response of a PID controlled system is incomplete due to the contribution of previously neglected factors, such as a closed loop zero and low loop gain,(More)
A digital control method for optimal capacitor charging was developed and tested by simulations and experimentally. The control algorithm follows the concept of first searching for the optimal charging conditions of the given power stage and then using the collected data in the free running operation. The major advantage of this control approach is that it(More)
The conditions for limit cycle oscillations in digitally controlled resonant converters were explored theoretically and tested by simulations and experiments. The analytical analysis reveals that, similar to the case of digital PWM control, limit cycles of such systems will occur when the LSB of the control is changing the output by a value that is larger(More)