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This paper proposes a novel Z-source dc-dc converter topology. Compared to the existing dc-dc converter circuits, they can reduce in-rush and harmonic current, provide larger range of output dc voltage and improve reliability. It can operate in voltage-fed and current-fed when the place of the source and load is exchanged each other, and it can be perform buck-boost function in these two conditions...
This paper proposes a novel bidirectional AC-AC converter based on the Z-source concept. This converter can provide bidirectional power flow. It has symmetrical circuit structure, and can reduce in-rush and harmonic current, provide larger range of output AC voltage and improve reliability. Simulation results verify the validity of the proposed converter.
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
This paper describes a new digital control method to enhance the dynamic performance of a dc-dc converter used in Plasma Display Panels (PDP). A simple digital PID compensator with duty ratio feed-forward control is proposed to minimize the output voltage variation for continuously changing load current. The duty ratio feed-forward is calculated using a noise-free load current information, which is...
A boost chopper can link dc battery system and ac drive system to increase the overall efficiency of electric propulsion system in hybrid electric vehicles. Its criterion for the variable voltage command is typically maximum-torque-perampere operation of the ac machine to minimize its copper loss as much as possible. The switching frequency of a boost chopper is generally much higher than that of...
This paper presents a new Adaptive Modulation Control (AMC) method which has proven to be very effective in achieving high bandwidth designs. AMC is a type of nonlinear control since it works only during large dynamic load transitions. Influence of AMC in both the time domain and frequency domain is analyzed. Simulation results and experimental data are included to show a very high bandwidth as well...
In this paper, a digital resistive current (DRC) control for parallel interleaved DC-DC converters is proposed. Converting the effective input characteristic of the converters seen by the source as a resistive load sink for current sharing, the proposed control scheme achieves current mode control, like the conventional analog charge current mode control. Also, the sub-harmonic oscillation at the...
The dynamics is improved to approximately first order by using peak current mode control, because of reducing a system order due to the inductor current is restrained as a control signal. However, the voltage mode control is mainly used, and there are few applications for which peak current mode control is used in VRM application. This paper presents, the transient response of VRM with peak current...
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