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.
A single switch multi-inductor buck-boost converter topology is presented for paralleling LED-networks. The proposed technique is based on discontinuous inductor currents to achieve a homogenous light-distribution of parallel connected high-brightness LEDs. In contrast to the common approach of driving LED-strings with constant-current, the proposed topology supplies the LEDs with constant-power....
In this paper, a review of Bridgeless Boost power factor correction (PFC) converters is presented at first. Performance comparison on conduction losses and common mode electromagnetic interference (EMI) are analyzed between conventional Boost PFC converter and members of Bridgeless PFC family. Experiment results are given to validate the efficiency analysis and EMI model building.
This paper proposes a non-isolated single-stage high power factor rectifier suitable for applications requiring low-voltage and high-current output. The proposed converter integrates two buck-boost converters with a buck converter. As a result, the proposed converter can operate over a wide range of input voltage with extended low output voltage capability, making it suitable for universal input applications...
This paper describes about how to utilize the industry standard critical conduction mode (CRM) boost interleaved power factor correction (PFC) control IC in a bridgeless environment. The proposed control technique is based on control signal diversion. It makes the bridgeless CRM boost interleaved PFC control signal looks like a conventional bridged-CRM boost interleaved PFC to the control IC. The...
The paper proposes a generalized circuit configuration of a new multilevel current-source inverter (CSI) with no-isolated switching devices. In this new multilevel inverter topology, all of the power-switches in the inverter are connected on a common-potential level. Hence, all of the power switches only need a single gate drive power supply without using isolated power supplies or conventional bootstrap...
This paper presents a PV inverter system formed by a DC-DC converter and a full-bridge DC-AC converter. The DC-DC converter combines the boost and flyback topologies to produce a semi-sinusoidal output current and to achieve the high step-up objective. A full-bridge DC-AC converter controlled with low-frequency switching techniques is then used to convert the current into sinusoidal form and to feed...
New bridgeless single phase AC-DC power factor correction (PFC) rectifiers based on Sepic and Cuk topologies are proposed. The absence of an input diode bridge and the presence of only two semiconductor switches in the current flowing path during each switching cycle results in less conduction losses and improved thermal management compared to the conventional Sepic and Cuk PFC converters. The proposed...
A novel squarewave current inverter suitable for arc welding is proposed in this paper. Current-steering diodes connected across the output chokes keep the inductor current continuous and retain the energy during the commutation period. The commutation time can thus be reduced to ensure a better welding performance. Also the stored energy can be released in the next energy transfer cycle to raise...
This paper presents a new single-stage singleswitch (S4) high power factor correction (PFC) AC/DC converter suitable for low power applications (< 150 W) with a universal input voltage range (90-265 Vrms). The proposed topology integrates a buck-boost input current shaper followed by a buck and a buck-boost converter, respectively. As a result, the proposed converter can operate with larger duty...
A novel topology of a double two-phase machine drive system is proposed. It is shown that by connecting the neutral lines of a two-phase permanent magnet machine (TPPM) and a two-phase induction machine (TPIM), only four switches need to be used for each machine and the two machines share one set capacitors. This paper develops the mathematical model of this system and establishes the simulation model...
This paper presented a power conditioning system integrating microturbine (MTG) and solid oxide fuel cells (SOFC) for auxiliary power units (APU) applications. Cascaded multilevel inverters are applied to achieve the power conversion between MTG and SOFC. Two different switching schemes, i.e. independent switching scheme and unified switching scheme, are proposed to eliminate low-order harmonics of...
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.