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The Five-Level Active-Neutral-Point-Clamped (5L-ANPC) inverters are receiving more attentions as one of preferred solutions for medium and high power applications because of the combination of the features of the conventional Flying-Capacitor (FC) type and Neutral-Point-Clamped (NPC) type inverters. This paper proposes a new DC-link capacitor voltages balancing technique for the Seven-Switch 5L-ANPC...
The Five-Level Active-Neutral-Point-Clamped (5L-ANPC) inverter is one of the most popular topologies among five-level inverters since it combines the features of Flying-Capacitor (FC) type and Neutral-Point-Clamped (NPC) type inverters and was commercially used for industrial applications. This paper proposes a novel modulation strategy for a Six-Switch 5L-ANPC (6S-5L-ANPC) topology to keep voltages...
The five-level active-neutral-point-clamped (ANPC) converters are newly hybrid topologies which have the advantages of traditional neutral-point-clamped (NPC) and flying-capacitor (FC) multilevel converters. A novel seven-switch five-level ANPC (7S-5L-ANPC) inverter topology is proposed, which reduces the number of active semiconductor switches over traditional 5L-ANPC inverter topologies. It is capable...
Multilevel converters are a popular solution for medium-voltage and high-power applications, including renewable energy conversion. Five-level active neutral-point-clamped converter (5L-ANPC) is one of the most advantageous topologies among five-level multilevel converters. A six-switch 5L-ANPC (6S-5L-ANPC) topology is proposed, which can achieve low-cost because several fast recovery diodes are employed...
Neutral-Point Clamped (NPC), such as diode-clamped, multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. However, the NPC Multilevel topology also has variable type of structure which cannot be found due to lack of systematic derivation methodology. A new system method, called NPC Flow Graph (NPC-FG), is proposed...
In this paper, the concept of the adaptive CSDs is proposed for high frequency synchronous buck converters. The idea of the adaptive CSDs is to achieve optimal design of the switching loss reduction and the drive loss reduction for wide load range. It should be noted that the adaptive concept is suitable for both the continuous and discontinuous CSDs regardless the drive circuit topologies. Through...
In this paper, a practical control strategy is presented which is capable of controlling a 12V–1.5V Buck converter and an auxiliary converter to achieve significantly improved unloading response performance. The auxiliary circuit is controlled by peak current mode method for a predictable number of auxiliary switching, while the charge balance controller minimizes the settling time of the Buck converter...
A new driving method for SR is presented. By applying a zero-crossing noise filter to the MOSFET, the false-triggering of the SR can be effectively eliminated. Moreover, the resistor and the capacitor in the filter can be used as a compensator to solve the duty cycle loss issue caused by the trace inductance of the MOSFET package. Only three passive components are needed in the proposed filter which...
Recently, optimal control on Buck converter for powering the latest computer central processor units (CPUs) has attracted more and more attention. In this paper, a novel digital control algorithm is presented to achieve the time-optimal response for dc-dc Buck converters without relying on any knowledge of converter design parameters such as output inductance, capacitance and even ESR value. This...
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