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Modular multilevel converters (MMC) have many advantages owing to their power-stage modularity. However, this modularity does not extend directly to the control. Particularly, the balancing control usually requires central coordination and increases in complexity with the system size. This paper presents a balancing control method for a more general modular multilevel converter with series and parallel...
Models of the modular multilevel voltage inverter (MMI) were developed. A quantity of series half-bridge transistor cells with capacitors in each arm is arbitrary. Modeling was implemented in MatLab and in the environment of in-house design ComSim. In ComSim the model was developed by the methodology of system modeling by interconnected subsystems, which allowed small machine time losses for calculations.
This paper describes a synapse circuit that approximately implements the dynamics of the dopamine (DA) modulated synapse proposed by Izhikevich (2007). The dynamics of the model, based on ‘eligibility traces’ generated according to a spike-timing-dependent plasticity (STDP) rule, ensure that causal pre-/post- synaptic spiking activity in the time preceding the reward, signaled by DA, leads to strengthening...
This paper presents a novel topology for LDO regulators, improving load regulation with very low quiescent current. The core of the circuit is made by operating the pass transistor in the linear region, achieving an area reduction above 90%, reducing the gate capacitance and therefore improving loop response. The proposed structure to improve the load regulation is based on transconductance cells...
The Z-source network, as a DC-link energy storage sub-circuit, was proposed to be used in DC-AC power conversion circuits (inverters) due to its advantages compared to the traditional LC DC-link. In this paper a new modified Z-source (MZS) network is proposed in order to reduce the number of switches in a single-phase inverter, from four switches, in a full-bridge converter, to only two switches,...
A new topology for a phase-controlled rectifier circuit is presented. Operation of this circuit is discussed in detail. Single and threephase circuits are shown. Experimental results are presented and a mathematical analysis of the systems' parameters is developed.
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