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A bidirectional integrated bus voltage conditioner (IBVC) is proposed for isolated phase shifted full bridge (PSFB) DC-DC converter to improve the DC bus voltage stability in cascaded power converter system. In this method, the load converter is controlled tightly with high control bandwidth. Unlike those separate converter based DC bus voltage stabilization methods with auxiliary switches, multiplexing...
A new ripple current reduction method utilizing a LLC type ripple current steering circuit is proposed in this paper to significantly reduce 100Hz ripple current in an isolated DC-AC dual active bridge (DAB) converter. Unlike some of the proposed ripple reduction methods for which auxiliary circuit consists of additional switches is applied, this new method benefits from less switching components...
Active ripple current reduction method is proposed for isolated DC/AC dual active bridge (DAB) converter to reduce the double grid frequency ripple in the DC current. Unlike those active methods that require extra switches to construct separate ripple reduction circuit, in this method, one or two branches of LC ripple steering circuits are used along with existing full bridge switches in a multiplexing...
Low-frequency switching strategies are considered as an effective way of achieving efficient performance in multilevel inverters. Selective harmonic elimination (SHE) is a modulation technique of this category which gives a superior outcome suppressing low-order detrimental harmonics. Limited number of decision variables offered by SHE in the corresponding nonlinear equations hinders obtaining quality...
Power and control isolation is necessary for many applications including isolated gate drive supply, device characterisation and the testing of power electronics converters. Commonly the isolation stage is integrated directly into the converter and therefore cannot easily be repurposed for another project, serviced in case of failure or easily adjusted for other power supply requirements. This paper...
This paper proposes a novel modulation strategy for a phase controlled Capacitor-Inductor-Capacitor (CLC) Resonant Dual Active Bridge (RDAB). The proposed modulation strategy improves the soft turn-on, Zero-Current-Switching (ZCS) and Zero-Voltage-Switching (ZVS) range of the converter while only minimally increasing the required reactive currents in the ac link. A mathematical analysis of the proposed...
This paper proposes a linear large signal state-space model for a phase controlled CLC (Capacitor Inductor Capacitor) Resonant Dual Active Bridge (RDAB). The proposed model is useful for fast simulation and for the estimation of state variables under large signal variation. The model is also useful for control design because the slow changing dynamics of the dq variables are relatively easy to control...
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