The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper presents an effective two stage DAB charging-up control method for modular DC-DC converters with low voltage side common DC bus voltage starting from zero. In 1st stage of charging, the DAB controller is modified to allow variable duty cycle control of medium voltage side DAB converter. In this stage, a constant charging-up current is applied so that low voltage side DC link voltage is...
This paper proposes a design of a single-switch non-isolated three-port converter for a standalone photovoltaic (PV) power system with energy storage. The three-port converter is obtained by combining the switches of two conventional cascaded DC-DC converters. Pulse-width modulation (PWM) and pulse-frequency modulation (PFM) are utilized to regulate the two converters respectively. The proposed design...
DC microgrids have sources such as solar power plants, battery storage systems, fuel cell power plants. DC-DC converters are used in each of these systems to interface them with DC bus of the microgrid. For economically optimized operation of microgrid, it is necessary to have a control system enabling desired load sharing between the DC-DC converters. The solution described here is incorporation...
Hysteretic control is widely adopted in the power management units (PMUs) for modern electronic devices due to their simple and stable control architecture, as well as the fast load transient response. However, the switching frequency of a traditional hysteretic converter is not fixed. It changes with operating condition and component aging, and hence brings in electro-magnetic interference (EMI)...
Current unbalance is an important issue in multiphase dc-dc converters. In this paper, three types of three-phase bidirectional dc-dc converters are introduced. Comparing to other two types of converters, the Y-connection type converter reduces the current mismatch significantly due to the inherent current sharing capability. To additionally alleviate current mismatch, a small signal method is applied...
Photo Voltaic (PV) generators today find application in the domestic field, where the decentralized power conversion concept has proven to be more advantageous than the conventional string architecture. According to the decentralized power conversion concept, PV modules are connected to a single phase AC grid through a two stage converter composed of a DC/DC converter and an inverter. The DC/DC converter...
In this paper, an active clamp circuit is applied to a flyback current-fed push pull converter to limit the voltage stress across the switch due to transformer leakage inductance. In addition, this clamp circuit provides soft switching condition for all switches. This allows the designer to increase the switching frequency in order to reduce the converter size. The proposed converter operates under...
In this paper, the small-signal averaged model of a new Sheppard-Taylor-based DC-DC converter, used in single-phase power factor correction (PFC) applications, is derived. Compared to the conventional Sheppard-Taylor converter, this topology allows lower voltage stresses across the capacitors and larger output voltage range for the same operating area. Based on the proposed model, a carrier-based...
A dual-mode input voltage modulation (IVM) control scheme for a three-phase ZCS series resonant (SR) inverter fed three-phase voltage multiplier based DC-DC converter for X-ray power generator is proposed. The three-phase ZCS SR inverter is formed by connecting three single-phase ZCS SR inverters in parallel and delaying the gating signals by 120deg with respect to each other. It operates at constant...
In this paper, a novel type of auxiliary switched capacitor assisted edge resonant soft switching PWM resonant DC-DC converter with two auxiliary edge resonant lossless inductor snubbers. The operation principle of this converter is described using the switching mode equivalent circuits. This newly developed multi resonant DC-DC converter can regulate its dc output AC power under a principle of constant...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.