Mostak Mohammad
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View article: Tuning circuitry for a wireless power system
Tuning circuitry for a wireless power system Open
A wireless power supply power supply including first tuning circuitry coupled directly to a transmitter, the first tuning circuitry including an LCC configuration. The wireless power supply may include second tuning circuitry coupled direc…
View article: Shielding system for wireless power transfer
Shielding system for wireless power transfer Open
A shield construction for transfer of wireless power is provided. The shield construction may be a magnetic shield having a plurality of layers and provided for a wireless transmitter or a wireless receiver, or both. The magnetic shield ma…
View article: Speed Variation-Based Power Regulation Concept for Dynamic Wireless Charging
Speed Variation-Based Power Regulation Concept for Dynamic Wireless Charging Open
On-road wireless charging of electric vehicles (EVs) in-motion could potentially reduce range anxiety or battery size with wide-spread deployment. The planning and implementation of such systems are greatly complicated due to their suscept…
View article: Overview of High-Power Wireless Charging Systems and Analysis of Polyphase Wireless Charging System Phase Winding and Resonant Tuning Network Connection Configurations
Overview of High-Power Wireless Charging Systems and Analysis of Polyphase Wireless Charging System Phase Winding and Resonant Tuning Network Connection Configurations Open
In spite of the high energy efficiency and environmental benefits of electric vehicles (EVs), adoption rates are increasing at a relatively slow pace, primarily because of EVs’ limited range and long charging durations. To reduce EV chargi…
View article: Thermal Management System of an Outer-Rotor-Motor-Based Traction Drive With Integrated Power Electronics in its Central Cavity
Thermal Management System of an Outer-Rotor-Motor-Based Traction Drive With Integrated Power Electronics in its Central Cavity Open
Increasing power densities of electric vehicle traction drive systems necessitates combining the electric motor and the power electronics into one unit. A compact, integrated traction drive unit with fewer components also drives production…
View article: Misalignment Tolerant Three-phase Wireless Fast Charging System for Electric Vehicles
Misalignment Tolerant Three-phase Wireless Fast Charging System for Electric Vehicles Open
This project proposes improving the technology level of the three-phase wireless charging technology developed at Oak Ridge National Laboratory (ORNL). Successful commercialization of wireless charging systems require that they meet strict…
View article: Electric Motor Thermal Management
Electric Motor Thermal Management Open
The poster reports the accomplishments of EDT-Electric Motor Thermal Management consortium project for 2024 VTO Annual Merit Review (AMR). The overall aims of the project are to support research enabling compact, reliable, low-cost, and ef…
View article: Fourier Analysis and Design of a Shielded 120 kW Inductive Wireless System
Fourier Analysis and Design of a Shielded 120 kW Inductive Wireless System Open
High-power inductive wireless power transfer (WPT) systems for EVs are designed to meet specifications such as stray field, power level, efficiency, misalignment tolerance, and ground clearance. These metrics are all heavily influenced by …
View article: Rotordynamic Analysis and Comparative Study of High-Speed Outer Rotor Permanent Magnet Motor Designs
Rotordynamic Analysis and Comparative Study of High-Speed Outer Rotor Permanent Magnet Motor Designs Open
High–power density electric motor designs are a requirement in aerospace and automotive applications. Outer rotor permanent magnet motors can offer high power density but have mechanical challenges such as structural stability and rotodyna…
View article: Thermal Analysis of a 100 kW Polyphase Wireless Power Transfer System
Thermal Analysis of a 100 kW Polyphase Wireless Power Transfer System Open
Charging Electric Vehicles (EVs) fast and safely has a crucial role in the future of the EV technology. High-power Wireless Power Transfer (WPT) helps to significantly decrease the charging time. However, when the power transfer levels inc…
View article: Fourier Analysis and Loss Modeling for Inductive Wireless Electric Vehicle Charging With Reduced Stray Field
Fourier Analysis and Loss Modeling for Inductive Wireless Electric Vehicle Charging With Reduced Stray Field Open
With the growth of electric vehicle (EV) popularity, different charging options to increase user convenience and reduce charging times are being considered and researched. Among these, inductive wireless power transfer (WPT) systems for EV…
View article: Comparison of 22 kHz and 85 kHz 50 kW Wireless Charging System Using Si and SiC Switches for Electric Vehicle
Comparison of 22 kHz and 85 kHz 50 kW Wireless Charging System Using Si and SiC Switches for Electric Vehicle Open
Fast charging in transportation application requires high-power (>50 kW) operation. The overall size of wireless charging systems (WCS) must increase to meet the high-power requirement. As a result, high power systems produce more electrom…
View article: A Compact, Single Stage, >1kV MediumVoltage Line Impedance Stabilization Network
A Compact, Single Stage, >1kV MediumVoltage Line Impedance Stabilization Network Open
This paper presents the design of a single-phase, single-stage line impedance stabilization network (LISN) for medium-voltage (MV) applications. More than 1 kV rated widebandgap (WBG) power semiconductor switches are increasingly utilized …
View article: Sensitivity Analysis of a Polyphase Wireless Power Transfer System Under Off-Nominal Conditions
Sensitivity Analysis of a Polyphase Wireless Power Transfer System Under Off-Nominal Conditions Open
Misaligned and/or variable coil airgaps cause coupling coefficient variation in wireless power transfer (WPT) systems, resulting in a decrease in the system’s transmitted power and efficiency. This paper presents sensitivity analyses of a …
View article: Encapsulation Residual Stress and Ferrite Loss in Inductive Coil Assemblies
Encapsulation Residual Stress and Ferrite Loss in Inductive Coil Assemblies Open
As inductive wireless charging reaches higher power levels, thermal management and mechanical durability become more critical. To address these concerns, past works have demonstrated the benefit of encapsulating coil assemblies in thermall…
View article: Pushing to the Distance Boundary of Inductive Wireless Power Transfer
Pushing to the Distance Boundary of Inductive Wireless Power Transfer Open
Wireless power transfer technology constantly involves tradeoffs among transfer distance, power and efficiency. Near-field WPT systems are ideal for high power and efficiency, while far-field WPT prevails at long distance. Pushing to longe…
View article: An integrated traction drive with a high speed surface permanent magnet external rotor motor for electric vehicles
An integrated traction drive with a high speed surface permanent magnet external rotor motor for electric vehicles Open
This work presents the detailed design of an outer rotor motor and integrated drive for passenger electric vehicles. The motor uses non-heavy rare earth permanent magnets and operates at a top speed of 20,000rpm. In-slot ceramic heat excha…
View article: Overview of Electrically Conductive and Active Shielding for Wireless Power Transfer with a Polyphase Wireless Electric Vehicle Charging Study
Overview of Electrically Conductive and Active Shielding for Wireless Power Transfer with a Polyphase Wireless Electric Vehicle Charging Study Open
The development and deployment of wireless power transfer (WPT) is increasing across industries including applications in healthcare, sensing and telecommunications, and electric vehicle charging due to its increased mobility and convenien…
View article: A Novel Honeycomb-DD Multi Coil Design for Wireless Power Transfer Systems
A Novel Honeycomb-DD Multi Coil Design for Wireless Power Transfer Systems Open
Wireless power transfer (WPT) technology has received significant attention recently as an alternative charging method for batteries in a wide range of power levels. In the literature, many types of coil structures have been well-studied. …
View article: A Novel LCC-CLCC Resonant Tuning Network for Light-Load Conditions in Wireless Power Transfer Systems
A Novel LCC-CLCC Resonant Tuning Network for Light-Load Conditions in Wireless Power Transfer Systems Open
In wireless power transfer (WPT) systems, voltage and current distortions are observed at the vehicle side rectifier when power flow is from grid to vehicle (G2V) under light load conditions. These distortions can increase switching losses…
View article: Severe Temperature Impact Study on Ferrite Electromagnetic Shielding for Wireless Electric Vehicle Charging
Severe Temperature Impact Study on Ferrite Electromagnetic Shielding for Wireless Electric Vehicle Charging Open
Wireless charging of an electric vehicle (EV) is an emerging technology that enables noncontact charging, which has advantages in terms of convenience and flexibility. However, the embedded charging pads under and on the ground expose the …
View article: Optimal Power Sharing Speed Compensation in On-road Wireless EV Charging Systems
Optimal Power Sharing Speed Compensation in On-road Wireless EV Charging Systems Open
Dynamic wireless charging of electric vehicles (EV) is an emerging technology with the potential to address range anxiety and reduce the size of batteries or provide charge-sustaining operation. Charging demand for dynamic wireless chargin…
View article: Efficiency and Output Power Sensitivity to Control Parameter Variations in an LCC-Series Wireless Power Transfer System
Efficiency and Output Power Sensitivity to Control Parameter Variations in an LCC-Series Wireless Power Transfer System Open
In wireless power transfer (WPT) systems, output power (Pout) can be controlled through input parameters such as, input voltage (Vin) , duty cycle (d) , and switching frequency (fsw) . The impact of these control parameters on the overall …
View article: Design Considerations of DC/DC Regulator for High-Power Dynamic Wireless Charging Systems
Design Considerations of DC/DC Regulator for High-Power Dynamic Wireless Charging Systems Open
Due to fast fluctuating input voltage, dynamic wireless charging requires a post-regulator stage for battery charging control and management. This regulator stage has a high requirement on efficiency, size as well as control performance to…
View article: Traction motor design trade-offs with additively manufactured anisotropic bonded magnets
Traction motor design trade-offs with additively manufactured anisotropic bonded magnets Open
Extrusion based big area additive manufacturing (BAAM) has been previously demonstrated for the fabrication of dense anisotropic bonded magnets. This paper reports on design trade-offs when such magnets are employed in a motor designed for…
View article: Interoperability between Three-Phase and Single-Phase WPT Systems
Interoperability between Three-Phase and Single-Phase WPT Systems Open
This paper presents an analysis and optimal position alignments of the transmitting and receiving couplers for achieving interoperability between a three-phase and a single-phase inductive wireless power transfer (WPT) system. In addition,…
View article: Self-Resonant Coil Design for High-frequency High-Power Inductive Wireless Power Transfer
Self-Resonant Coil Design for High-frequency High-Power Inductive Wireless Power Transfer Open
In this paper, the design methodology of a high-frequency, high-power, long-distance inductive wireless power transfer (WPT) is presented. The airgap (d) of a traditional high-power (>1 kW) WPT is limited to a few hundred millimeters, whic…
View article: An Integrated Electric Vehicle Drive Motor and Wireless Charger
An Integrated Electric Vehicle Drive Motor and Wireless Charger Open
This work proposes an in-wheel electric vehicle-motor in which the motor windings also act as receiver coils in a wireless charging system. Vehicle wireless charging systems normally include a receiver coil, compensation network, rectifier…
View article: Modular Power Electronics Approach for High-Power Dynamic Wireless Charging System
Modular Power Electronics Approach for High-Power Dynamic Wireless Charging System Open
Dynamic wireless power transfer (DWPT) can provide energy to EVs in motion and extend the drive range. Upscaling the charging power to 200 kW (High Power DWPT) reduces the percentage of electrified roadway required, and the solution become…
View article: Magnetic Shield Design for the Double-D Coil-Based Wireless Charging System
Magnetic Shield Design for the Double-D Coil-Based Wireless Charging System Open
In this work, magnetic field emission (MFE) of the high-power double-D (DD) coil-based wireless charging system is investigated and a shielding technique is proposed. The MFE pattern produced by the DD coils is significantly different from…