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 introduces two new hybrid architectures for active balancing of serially connected batteries string. These architectures feature simple sensorless implementation, modularity, design flexibility and reduced component count. The key point of the balancing concept is that by merging two active balancing approaches, additional power paths between batteries cells are created, but without the...
This paper introduces a new isolated converter topology for parallel balancing of serially connected batteries string. The system uses a low voltage bus capacitor as an energy buffer that is common for all the cells and balancing of the string is achieved by voltage equalizing of the cells. Each converter is in charge of balancing three adjacent cells, reducing the components count of the system....
This study presents a novel, triangular current shaped, low power, low input and high output capacitor charger with current sourcing characteristics. Unlike the Flyback topology, which is commonly used for high voltage low power chargers, high leakage of the isolation transformer is allowed here. Consequently, the primary and the secondary windings need not be kept close to each other, and the transformer...
This paper introduces a new balancing topology for serially connected batteries string. The balancing operation provides fast convergence of the cells using a non-isolated parallel balancing approach with a low voltage bus that is used as an energy buffer. Balancing of the string is achieved through voltage equalization of the cells. The converter is operated in DCM and the current that flows between...
This paper introduces a new topology for parallel balancing of serially connected batteries string. The main advantage of the balancing concept is that energy is transferred only when the cells are unbalanced. As a result, the power losses are significantly reduced since no current circulates through the system when balanced. This has been enabled by a modification of an isolated series-resonant converter...
This study investigates the applicability of parallelly connected SiC MOSFETs to high voltage, high input current, and fast transient modulator. The behavior of the proposed approach was tested experimentally on a 650W prototype. The SiC MOSFET transistors were operated at nominal voltage of 840V and current of 800A. The modulator was loaded by a 30kV magnetron. Rise and fall times obtained at the...
The energy, generated by photovoltaic (PV) module consisting of serially connected PV cells is considerably reduced when a unit is shadowed or has a defect. This problem can be remedied by bypassing the weak units by an active circuitry, such as power converter, connected in parallel to the PV units. This way the power converter balances the power between the PV units. This study evaluates the effectiveness...
When driving constant voltage loads that call for the stabilization of the output current, rather than output voltage, the use of topologies that have an output current sourcing behavior could be advantageous. This study proposes and analyses a one-stage, zero current switched, high voltage gain current sourcing converter to drive such a load. The topology is based on the parallel resonant converter,...
Two approaches of operating inductors in switched mode power converters are compared. The classic method, utilized in most PWM converters, is to place the inductor in a path that has a non-zero average current. Such inductors are referred to here as "DC inductors". In contrast, inductors that operate with zero average current are denoted "AC inductors". The theoretical analysis...
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.