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.
The number of power supplies connected to the public household power grid is constantly increasing. For a good mains voltage quality, the harmonic input currents are limited in standards. Many applications also require a lower output voltage with isolation. Today, this is mostly obtained via a multi-stage converter, consisting of a diode bridge rectifier, a boost PFC and a DC-DC converter with galvanic...
The eGaN HEMTs with ZVS technique have emerged in high frequency converters to reduce the switching loss. This paper investigates an eGaN HEMT ZVS isolated SEPIC converter running up to 2 MHz. Furthermore, an inductor optimization method is proposed to ensure ZVS and reduce reverse conduction loss of the SR. The efficiency curve is optimized based on the trade-off method between the switching and...
In this paper, a cascaded multi-stage non-isolated high voltage conversion ratio (VCR) bidirectional DC/DC converter is proposed. The VCR is n times of the conventional buck/boost converter with only n+2 switches. All the switches can achieve full range ZVS whether in the buck or boost mode. The low voltage side current ripple can be reduced with two-phase interleaved structure, which is suitable...
This paper proposes an integrated onboard charger architecture for plug-in electric vehicles (PEVs). In this architecture, the phase shifted full bridge topology (PSFB) with voltage doubler rectifier serves to charge the high voltage battery pack. A half-bridge secondary side regulated LLC based topology (SSR-LLC) is employed to supply power to the onboard auxiliary battery. The half-bridge SSR-LLC...
In this paper, a novel dual-input DC/DC topology is presented. The converter can boost the different voltages of two power sources to a stable output voltage for the load demand. It integrates two boost converts with shared diode and filtering capacitor. Zero voltage switching (ZVS) of all switches is achieved without auxiliary circuit. Hence, the switching losses of the power semiconductors can be...
In a typical plug-in electric vehicle onboard charger, the input voltage of the second stage dc/dc converter is usually kept constant while the battery pack voltage varies in a wide range with the change of battery state of charge. In this application, it is extremely difficult to tune the operation of traditional LLC resonant converter close to its resonant frequency. In this paper, a novel pulse...
This paper presents an adaptive Zero-Voltage-Switching control (ZVS) method and a hybrid current control strategy for the GaN-based MHz Totem-pole PFC rectifier. This novel ZVS control achieves the minimum ZVS time margin and maximum switching frequency clamping by adaptively controlling the synchronous rectifier (SR) turn off current. This adaptive SR turn off current control is a unified control...
This paper presents a hybrid control strategy for a dual active bridge (DAB) based dc-dc converter which combines the benefits of traditional phase shift and burst mode modulation schemes. The advantage of using such a control strategy stems from the fact that it can extend the zero voltage switching (ZVS) range of all power switches in both the primary and secondary bridges when there is a wide variation...
This paper proposes a new high gain soft switching dc-dc topology based on switched inductor boost converter (SIBC). SIBC itself as a high gain boost topology has the issue of high conduction loss in switching diodes and high switching loss in the main switches. Also, it has severe EMI issue due to the diode path between input and switching node. The new topology is derived aiming at zero voltage...
The work presented in this paper focuses on the drawbacks of three limb three winding transformer for use in three port dc-dc converter and proposes a split-winding type transformer approach using three limb core for use in three port dc-dc converter. The three limb three winding type transformer has drawback due to limitation of power flow when one port is idle and also has a very limited ZVS operating...
An unequal pulse-width modulation (PWM) is proposed for the current-fed dual-active bridge (DAB) bidirectional DC-DC converter for battery charging/discharging applications when the battery voltage is wide. The difference of the effective duty cycles between the two sides is constant in spite of the battery voltage and the transferred power. With the proposed control, zero-voltage switching (ZVS)...
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.