No abstract

Ahstract-This paper deals with spectrum analysis of a PWM signal on the basis of the study of idealized zero (instantaneous switching) and one (non-instantaneous linear switching edges) order models. In the literature, it is shown that high frequency content of a PWM signal is all the more reduced as it is differentiable a large number of times [2]. It is shown in this paper that minimal bound of high frequency spectrum is reached when a gaussian switching pattern is used. This result is proved by using the Heisenberg-Gabor uncertainty principle (widely known by physicists in quantum mechanics).

No abstract

This paper deals with an innovating pulsewidth modulation (PWM) strategy allowing reduction of the dc input current ripples in classical operating area of adjustable-speed drives, and also maintaining a good quality of ac current waveforms and limited switching losses in the inverter. Thus, such a strategy is an interesting solution within embedded systems. Theoretical principles of the proposed method are introduced. Then, simulation results highlight the benefits of this algorithm compared to classical PWM control. Finally, a DSP-base implementation has been performed, and effectiveness of this strategy is confirmed by experiments for a starter-generator application.Index Terms-DC-link capacitor, direct digitalized technique (DDT), inverter control, pulsewidth modulation (PWM) strategy, switching losses.

No abstract

No abstract

No abstract

No abstract