Suvendu Samanta

A new inductive wireless power transfer topology using current-fed half bridge CLC transmitter LC receiver configuration

A new current-fed topology for wireless inductive power transfer (IPT) application using half-bridge circuit is proposed and analyzed. Conventional IPT circuits employ parallel L-C resonant tank/compensation network to transfer power effectively through air-gap. However, in medium power application, this topology suffers from a major drawback that the voltage stress across the inverter switches are considerably high due to high reactive power consumed by the loosely coupled coil. In the proposed topology, his is mitigated by adding a properly designed capacitor in series with the coils. During grid-to-vehicle (G2V) operation, the power flow is controlled through variable switching frequency modulation to achieve extended ZVS of the inverter switches. For G2V operation, the converter circuit is analyzed and simulated using PSIM 9.3. Analytical and simulation results are verified through experimental results obtained by testing a 1.2AW lab-prototype.

Analysis and Design of Current-Fed Half-Bridge (C)(LC)–( LC) Resonant Topology for Inductive Wireless Power Transfer Application

This paper proposes and analyzes a new power electronics circuit topology for wireless inductive power transfer application using current-fed half-bridge converter with CCL-LC resonant network. The major focus is analysis and implementation of a new current-fed resonant topology with current-sharing and voltage doubling features. Generally, inductive power transfer circuits with current fed converter use parallel CL resonant tank to transfer power effectively through air gap. However, in medium power application, this topology suffers from a major limitation of high voltage stress across the inverter semiconductor devices owing to high reactive power consumed by loosely coupled coil. In proposed topology, this is mitigated by adding a capacitor in series with the coil developing series-parallel CCL tank. The power flow is controlled through variable frequency modulation. Soft-switching of the devices is obtained irrespective of the load current. For grid-to-vehicle or solar-to-vehicle, the converter is analyzed and detailed design procedure is illustrated. Experimental results are presented to verify the analysis and demonstrate the performance.

Bidirectional wireless power transfer topology using current-fed half bridge CLC transmitter LC receiver configuration for medium power applications

This paper presents a new bidirectional wireless power transfer (WPT) topology using current fed half bridge converter. Generally, WPT topology with current fed converter uses parallel LC resonant tank network in the transmitter side to compensate the reactive power. However, in medium power application this topology suffers a major drawback that the voltage stress in the inverter switches are considerably high due to high reactive power consumed by the loosely coupled coil. In the proposed topology this is mitigated by adding a suitably designed capacitor in series with the transmitter coil. Both during grid to vehicle and vehicle to grid operations the power flow is controlled through variable switching frequency to achieve extended ZVS of the inverter switches. Detail analysis and converter design procedure is presented for both grid to vehicle and vehicle to grid operations. A 1.2kW lab-prototype is developed and experimental results are presented to verify the analysis.

A New Inductive Power Transfer Topology Using Direct AC–AC Converter With Active Source Current Waveshaping

Generally, in wireless inductive power transfer (IPT) system, the power is processed through multiple power transfer stages and this leads to lower efficiency and higher cost of the system. Recent research shows that the use of a direct ac–ac converter in an IPT system compensates these limitations significantly. However, one of the major challenges of the IPT circuit with direct ac–ac converter is to achieve multiple control goals through a single converter. These include load power requirement, maintaining high-quality source current and achieving soft switching of inverter switches, etc. In the existing literatures, the research is more focused on meeting load power requirement and soft switching of inverter switches. The major focus of this paper is to propose, analyze, and control a new IPT power converter topology using current-fed direct ac–ac converter. Compare with existing buck derived, i.e., voltage source ac–ac converter topologies, the proposed topology is boost derived; therefore, active source current waveshaping is easily obtained. The complete control is carried out through two loops, where the outer output current loop ensures load requirements and inner loop maintains the high-quality grid current. The detail of steady-state and dynamic analysis and design procedure of the converter is presented. Experimental results obtained from a 1.2-kW lab-build prototype are included to verify the analysis and proposed control.

A new inductive power transfer topology using direct AC-AC converter with active source current control

Generally, in wireless inductive power transfer (IPT) system the power is processed through multiple power transfer stages and this leads to lower efficiency and higher cost of the system. Recent research shows that the use of direct ac-ac converter in IPT system compensates these limitations significantly. However, one of the major challenge of IPT circuit with direct ac-ac converter is to achieve multiple control goals through a single converter. These include load power requirement, maintaining high quality source current and achieving soft-switching of inverter switches etc. In the existing literatures the research is more focused on meeting load power requirement and soft switching of inverter switches. This paper presents a new IPT topology using direct ac-ac converter topology. The control is carried out through conventional two loop method where the outer output voltage loop ensures load requirements and inner loop maintains high quality grid current. Maintaining output power factor of direct ac-ac converter in the lagging side, the ZVS turn on and ZCS turn off of two of the inverter switches are achieved. The detail analysis and design procedure of the converter is presented and experimental results are included to verify the analysis and proposed control.

A novel zero voltage switching inductive power transfer topology using current-fed converter for EV battery charging applications

This paper presents a new inductive power transfer topology for EV battery charging applications. The transmitter side converter is selected as current-fed half bridge to achieve both ZVS turn-on and turn-off of all inverter switches. The receiver side converter is voltage doubler topology to achieve higher voltage gain and to reduce the number of components onboard. To make the converter suitable for higher power application, the transmitter side tank network is used as (C) (LC) type whereas the receiver side tank network is selected as series LC type to keep least number of components in EV. The proposed converter is analyzed and simulated in PSIM 10. A 1.2kW lab prototype is developed and experimental results are included to verify the analysis and simulation results.

Current-fed full-bridge and half-bridge topologies with CCL transmitter and LC receiver tanks for wireless inductive power transfer application

This paper presents a performance comparison between inductive power transfer (IPT) with current fed full bridge and half bridge converter topologies. Generally current-fed IPT topology with parallel LC tank is not suitable for medium power application due to higher voltage stress on inverter switches. In this comparison a modified CCL tank network at transmitter is selected for both the half and full bridge topologies. Mathematical analysis of both converter is presented to perform the comparison. The full bridge topology provides slightly better efficiency compare with half bridge whereas the overall component cost for full bridge is higher due to higher component count. To verify the analysis numerical simulation is performed in PowerSIM 10 for 2.0kW power transfer.

Concept study and feasibility analysis of current-fed power electronics for wireless power transfer system

This paper studies and explores feasibility of wireless inductive power transfer (IPT) systems using current source inverter (CSI) topology for electric vehicle battery charging applications. Possible IPT systems with CSI topology includes current-fed push-pull, half-bridge and full-bridge converters. Also the possible compensation or resonant tank network at transmitter side is parallel LC or CCL type. Receiver side tank network is generally selected as series LC type to keep least number of components onboard. First, a brief overview of all possible IPT power supplies suitable for medium power applications is presented. This IPT topologies include series, parallel and several combinations of series-parallel compensation networks. Then a detailed study and comparison is presented for several current-fed IPT systems. Based on the study both the current-fed full-bridge and half-bridge topologies with CCL tank network provides performances suitable for higher power applications. A 1.2kW hardware prototype is developed and experimental results are presented to verify the comparative study results.