Abstract
A new single-input multiple-output (SIMO) converter is proposed in this work by incorporating flyback and buck converters in a master–slave configuration. The objective of this work is to address the cross regulation problem, achieve tight voltage regulation, improve the circuit form factor and attain a fast transient response for a SIMO flyback converter. The flyback converter maintains the output channels within 10% of their rated voltages and the SIMO buck converter is placed in series with the flyback converter such that it compensates for the output voltage deviation. Moreover, a time multiplexing switching scheme decouples output channel to eliminate the cross-regulation problem and remove the need for an additional winding transformer per each output channel. A type II compensator with a peak current mode controller was designed to achieve faster transient response which is critical for the proposed configuration. A thorough steady-state analysis was carried out on a triple output channel topology to obtain the design criteria and component values. MATLAB/Simscape modelling and simulation was used to validate the effectiveness of the proposed converter with the result yielding satisfactory transience even with load disturbance. Additionally, the result of the proposed converter is compared with previously published works.
Highlights
The advancement in Electrical Vehicles (EVs), grid technology, medical instrumentation, military technology, building and factory automation has led to a high demand of dc–dc converters with galvanic isolation and multi-channeled output
The objective of this paper is to develop a single-input multiple-output (SIMO) power supply based on a flyback converter, to achieve independent output control, no cross regulation and minimal deviation on output voltages
Lr is shown as the tertiary winding of the flyback transformer, while in practice it can be substituted with a fixed inductor to use the same number of components as a resistor–capacitor–diode (RCD) snubber circuit and decrease the overall form factor
Summary
The advancement in Electrical Vehicles (EVs), grid technology, medical instrumentation, military technology, building and factory automation has led to a high demand of dc–dc converters with galvanic isolation and multi-channeled output. The primary goal of a multiple output DC/DC converter is to offer an efficient, compact and simple power supply that accommodates different load conditions at the same time. The simplest but not the most efficient topology is conventionally formed by incorporating N independent converters to drive N outputs. This configuration offers simplicity, effective performance and independent control, the final product is bulky and costly especially when galvanic isolation is necessary
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