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REDUCTION OF REVERSE RECOVERY LOSSES IN SOFT SWITCHED PWM CONVERTERS BY SATURABLE REACTORS
Svetlana Hacharnov,Sam Ben-Yaakov 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
The objective of this study was to investigate the effect of the saturable reactor on the reverse recovery process of diode. This was done by PSPICE (MicroSim Inc.) simulation of an equivalent circuit that represents the problem on hand including a qualitative account of all major losses. The simulation that was verified by experimental results, point out to the merit of connecting a bypass resistor in parallel with the saturable reactor. The simulation methodology developed in the paper could be helpful in studying other reverse recovery problems.
NEURAL NETWORK CONTROL OF SWITCH MODE SYSTEMS: OFF LINE TRAINING BY AN "IDEAL CONTROLLER" DATA SET
Natalia Kodner,Daniel Adar,Sam Ben-Yaakov 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10
A novel method is proposed for designing Neural Network Controllers (NNC) for switch mode systems. The method applies a new concept: "The Ideal Controller" which is run 'off-line' to generate a record of 'perfect' control signals in response to input and output perturbations. The record is then used as an 'off-line' training set for a Neural Network controller. The advantages of the proposed method are three fold: (a) the training set is the best possible, (b) training is done 'off line' by simulation and (c) there is no need to derive or guess the control law. The present study demonstrates by simulation the potential excellent performance of a NNC for DC-DC Switch-Mode converters when trained by the proposed methodology. The proposed methodology can be readily expanded to other Switch-Mode systems such as inverters and power factor conditioners.