Gui-Jia Su
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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: 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: Stacked-Die SiC Half-Bridge Module with Minimum Loop Inductance
Stacked-Die SiC Half-Bridge Module with Minimum Loop Inductance Open
Minimizing parasitic inductance of power modules is needed to advance their electrical performance. Innovation in the past decade has driven down the inductance of SiC half-bridge power modules to around 1–2 nH by using multilayer, embedde…
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: Medium-Duty Delivery Truck Integrated Bidirectional Wireless Power Transfer System With Grid and Stationary Energy Storage System Connectivity
Medium-Duty Delivery Truck Integrated Bidirectional Wireless Power Transfer System With Grid and Stationary Energy Storage System Connectivity Open
Electric vehicles (EVs) can provide power to the grid or buildings similar to distributed energy resources (DER) for energy balancing applications or optimizing the operation of the microgrids in harmony with the other DER assets. This art…
View article: Predictive Control to Further Reduce DC-Link Capacitor Current Stress for Segmented Inverter
Predictive Control to Further Reduce DC-Link Capacitor Current Stress for Segmented Inverter Open
Two three-phase interleaved inverters have been used in traction drive applications to reduce the current stress in a DC link capacitor bank. In such applications, either carrier-based or space vector modulation is used to select the optim…
View article: Wireless power system
Wireless power system Open
A method for wirelessly or conductively (non-wireless) providing AC or DC power in AC or DC load applications and bidirectional applications.
View article: System and method of inverter control
System and method of inverter control Open
A control system and method for an inverter that reduces capacitor current through a DC bus capacitor of the inverter. The control system and method may generate switching signals for a plurality of switching circuits in a manner that redu…
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: A High-Power Density Segmented Traction Drive Inverter
A High-Power Density Segmented Traction Drive Inverter Open
High power density is one of the requirements for traction drive inverters for meeting increasing demand for higher power and performance electrical vehicles (EV). This paper presents design and preliminary experimental results for a 100 k…
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: 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: 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: 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: Cascaded die mountings with spring-loaded contact-bond options
Cascaded die mountings with spring-loaded contact-bond options Open
A cascaded die mounting device and method using spring contacts for die attachment, with or without metallic bonds between the contacts and the dies, is disclosed. One embodiment is for the direct refrigerant cooling of an inverter/convert…
View article: Method of making cascaded die mountings with springs-loaded contact-bond options
Method of making cascaded die mountings with springs-loaded contact-bond options Open
A cascaded die mounting device and method using spring contacts for die attachment, with or without metallic bonds between the contacts and the dies, is disclosed. One embodiment is for the direct refrigerant cooling of an inverter/convert…
View article: Power conversion apparatus and method
Power conversion apparatus and method Open
A power conversion apparatus includes an interfacing circuit that enables a current source inverter to operate from a voltage energy storage device (voltage source), such as a battery, ultracapacitor or fuel cell. The interfacing circuit, …
View article: Triple voltage dc-to-dc converter and method
Triple voltage dc-to-dc converter and method Open
A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolatio…
View article: Motor stator using corner scraps for additional electrical components
Motor stator using corner scraps for additional electrical components Open
A method for making a motor and auxiliary devices with a unified stator body comprises providing a piece of material (10) having an area larger than a cross section of the stator (11), removing material from the piece of material (10) to f…
View article: Effective switching frequency multiplier inverter
Effective switching frequency multiplier inverter Open
A switching frequency multiplier inverter for low inductance machines that uses parallel connection of switches and each switch is independently controlled according to a pulse width modulation scheme. The effective switching frequency is …
View article: Integrated Inverter For Driving Multiple Electric Machines
Integrated Inverter For Driving Multiple Electric Machines Open
An electric machine drive (50) has a plurality of inverters (50a, 50b) for controlling respective electric machines (57, 62), which may include a three-phase main traction machine (57) and two-phase accessory machines (62) in a hybrid or e…
View article: Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages
Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages Open
A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connect…
View article: Utilizing zero-sequence switchings for reversible converters
Utilizing zero-sequence switchings for reversible converters Open
A method for providing additional dc inputs or outputs (49, 59) from a dc-to-ac inverter (10) for controlling motor loads (60) comprises deriving zero-sequence components (V.sub.ao, V.sub.bo, and V.sub.co) from the inverter (10) through ad…
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…
View article: A 100-kW Wireless Power Transfer System Development Using Polyphase Electromagnetic Couplers
A 100-kW Wireless Power Transfer System Development Using Polyphase Electromagnetic Couplers Open
Wireless power transfer (WPT) is an essential technology enabling automated charging of electric vehicles with safety, convenience, and flexibility while having high efficiencies. High-power wireless charging systems will be one of the dom…
View article: Modeling and Analysis of a Polyphase Wireless Power Transfer System for EV Charging Applications
Modeling and Analysis of a Polyphase Wireless Power Transfer System for EV Charging Applications Open
Extreme fast charging is an emerging technology targeting to significantly decrease charging times of electric vehicles to 10–20 minutes, similar to an interstate gas refueling practice. High-power wireless power transfer (WPT) systems wit…
View article: Design and Analysis of a 200 kW Dynamic Wireless Charging System for Electric Vehicles
Design and Analysis of a 200 kW Dynamic Wireless Charging System for Electric Vehicles Open
Dynamic wireless charging of electric vehicles can significantly alleviate or eliminate range anxiety while reducing the required on-board battery capacity. To achieve an electric vehicle charging balance with minimal infrastructure costs,…