Juan Rivas-Davila
Assistant Professor of Electrical Engineering and Center Fellow, by courtesy, at the Precourt Institute for Energy
Web page: http://web.stanford.edu/people/jmrivas
Bio
Professor Rivas came to Stanford as an assistant professor in January 2014. He was an assistant professor in Electrical Engineering at the University of Michigan. Before becoming a faculty member in 2011, he worked for the General Electric Global Research Center developing power electronics for medical imaging and aviation systems. He received the B.Sc. degree in electrical engineering from the Monterrey Institute of Technology (Mexico) in 1998. He obtained his masters (2003) and doctoral degree (2006) at the Massachusetts Institute of Technology. His research interests are in power electronics, RF power amplifiers, resonant converters, soft switching topologies and design of power converters for operation in harsh environments.
Academic Appointments
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Assistant Professor, Electrical Engineering
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Center Fellow (By courtesy), Precourt Institute for Energy
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Member, Cardiovascular Institute
Honors & Awards
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Best Paper: HF Bidirectional Resonant Converter for High Conversion Ratio & Variable Load Operation, Control and Modeling for Power Electronics Workshop (2018)
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Faculty Early Career Development (CAREER) Program”, National Science Foundation (2013)
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Best Paper Award: "13.56 MHz high voltage multi-level resonant DC-DC converter", Control and Modeling for Power Electronics Workshop (2015)
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Transactions Paper Award: "Resistance Compression Networks for Radio-Frequency Power conversion", IEEE Power Electronics Society (2007)
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2nd Prize Award: High Frequency Resonant SEPIC Converter With Wide Input and Output Voltage Ranges'', IEEE Power Electronics Society (2012)
Professional Education
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B.A., ITESM, Mexico City Campus, Electrical and Communications Engineering (1998)
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S.M., Massachusetts Institute of Technology, Output Power Increase at Idle Speed in Alternators (2003)
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Sc.D., Massachusetts Institute of Technology, Radio Frequency dc-dc Power Conversion (2006)
Patents
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Satish Prabhakaran, John Stanley Glaser, Ljubisa Dragoljub Stevanovic, Juan Manuel Rivas Davila. "United States Patent US 8567046 B2 Methods for making magnetic components", General Electric Company, Oct 29, 2013
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Rixin Lai, Luis Jose Garces, Juan Antonio Sabate, Juan Manuel Rivas Davila, Song Chi, Wesley Michael Skeffington,. "United States Patent US 8502539 B2 Gradient amplifier system", General Electric Company, Jul 31, 2013
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Mehmet Arik, Tunc Icoz, Juan Manuel Rivas Davila, Charles Erklin Seeley, Yogen Vishwas Utturkar, Stanton Earl Weaver, Jr.. "United States Patent US 8496049 B2 Heat sinks with distributed and integrated jet cooling", General Electric Company, Jul 30, 2013
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John Stanley Glaser, Juan Manuel Rivas Davila. "United States Patent US 7924580 B2 Switching inverters and converters for power conversion", General Electric Company, Apr 12, 2011
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David J. Perreault, Juan M. Rivas, Anthony D. Sagneri, Olivia Leitermann, Yehui Han, Robert C. N. Pilawa-Podgurski,. "United States Patent 7,889,519 B2 Methods and apparatus for a resonant converter", Massachusetts Institute Of Technology, Feb 15, 2011
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David J. Perreault, Juan M. Rivas, Yehui Han, Olivia Leitermann. "United States Patent 7535133 B2 Methods and apparatus for resistance compression networks", Massachusetts Institute Of Technology, May 19, 2009
Current Research and Scholarly Interests
Modern applications are driving demand for power systems with capabilities beyond what is presently achievable. High performance systems, like medical imaging systems and other applications impose challenging specifications on power density and bandwidth that are difficult to achieve with current circuit topologies. Power density can be improved with better semiconductor components and passive elements, and by reducing the energy storage requirements of the system. By dramatically increasing the switching frequency, it is possible to reduce the energy storage requirements and improve bandwidth. I'm interested in the development of system architectures and circuit topologies for dc-ac and dc-dc power conversion that can reach switching frequencies of 10’s to 100’s of MHz. Switching at these frequencies will lead to efficient converters with inductors and transformers having no magnetic material to limit their high frequency performance, and with small-valued capacitors.
At these switching frequencies, all inductors can be air-cored, eliminating core losses, saturation, and extending their operating temperature range. I have been involved in the development of dc-dc converter that archives a significant reduction in peak switch voltage stress, requires small passive components with low energy storage, and provides the capability for extremely rapid startup and shutdown.
Another goal of my work is to implement a value-added strategy in inexpensive printed circuit boards (PCB) by fabricating all passive devices of a power converter (inductors and capacitors) with traces, transforming the PCB into a 3-D resonant structure. This approach will eliminate tuning and component variation while simultaneously maintaining extraordinary levels of performance at reduced cost. Moreover, there a lot of exciting applications for these high frequency circuits.
2018-19 Courses
- Magnetics Design in Power Electronics
EE 356B (Aut) - Power Electronics
EE 153, EE 253 (Spr) -
Independent Studies (5)
- Special Studies and Reports in Electrical Engineering
EE 191 (Aut, Win, Spr, Sum) - Special Studies and Reports in Electrical Engineering
EE 391 (Aut, Win, Spr, Sum) - Special Studies and Reports in Electrical Engineering (WIM)
EE 191W (Aut, Win, Spr, Sum) - Special Studies or Projects in Electrical Engineering
EE 190 (Aut, Win, Spr, Sum) - Special Studies or Projects in Electrical Engineering
EE 390 (Aut, Win, Spr, Sum)
- Special Studies and Reports in Electrical Engineering
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Prior Year Courses
2017-18 Courses
- Power Electronics
EE 153, EE 253 (Win) - Resonant Converters
EE 356A (Aut)
2016-17 Courses
- Advanced Topics in Power Electronics
EE 254 (Spr) - Power Electronics
EE 153, EE 253 (Win)
2015-16 Courses
- Advanced Topics in Power Electronics
EE 254 (Spr) - Power Electronics
EE 153, EE 253 (Win) - Resonant Converters
EE 356A (Aut)
- Power Electronics
Stanford Advisees
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Doctoral Dissertation Reader (AC)
Gustavo Vianna Cezar -
Doctoral Dissertation Advisor (AC)
Jungwon Choi -
Master's Program Advisor
Katherine Pregler, Johnson Underwood, Nicolo Gabriel Zulaybar, Breno de Mello Dal Bianco -
Doctoral Dissertation Co-Advisor (AC)
Nathan Volman -
Doctoral (Program)
Jungwon Choi
All Publications
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Duty Cycle and Frequency Modulations in Class-E DC-DC Converters for a Wide Range of Input and Output Voltages
IEEE TRANSACTIONS ON POWER ELECTRONICS
2018; 33 (12): 10524–38
View details for DOI 10.1109/TPEL.2018.2809666
View details for Web of Science ID 000445355900046
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C-OSS Losses in 600 V GaN Power Semiconductors in Soft-Switched, High- and Very-High-Frequency Power Converters
IEEE TRANSACTIONS ON POWER ELECTRONICS
2018; 33 (12): 10748–63
View details for DOI 10.1109/TPEL.2018.2800533
View details for Web of Science ID 000445355900066
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An Integrated RF Power Delivery and Plasma Micro-Thruster System for Nano-Satellites
FRONTIERS IN PHYSICS
2018; 6
View details for DOI 10.3389/fphy.2018.00115
View details for Web of Science ID 000447153600001
- A Very High Frequency dc-dc Converter Based on a Class 2 Resonant Inverter
- A high-frequency resonant inverter topology with low voltage stress
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Design of a Class-DE Rectifier with Shunt Inductance and Nonlinear Capacitance for High-Voltage Conversion
IEEE TRANSACTIONS ON POWER ELECTRONICS
2018; 33 (3): 2282–94
View details for DOI 10.1109/TPEL.2017.2693271
View details for Web of Science ID 000417819300037
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High-Frequency Resonant Converter with Synchronous Rectification for High Conversion Ratio and Variable Load Operation
IEEE. 2018: 632–38
View details for Web of Science ID 000449328900092
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60 V-to-35 kV Input-Parallel Output-Series DC-DC Converter Using Multi-Level Class-DE Rectifiers
IEEE. 2018: 2235–41
View details for Web of Science ID 000434981902062
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FPGA-based Dynamic Duty Cycle and Frequency Controller for a Class-E-2 DC-DC Converter
IEEE. 2018: 282–88
View details for Web of Science ID 000449328900036
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Vacuum Testing of a Miniaturized Switch Mode Amplifier Powering an Electrothermal Plasma Micro-Thruster
FRONTIERS IN PHYSICS
2017; 5
View details for DOI 10.3389/fphy.2017.00036
View details for Web of Science ID 000409039400001
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Output Capacitance Losses in 600 V GaN Power Semiconductors with Large Voltage Swings at High- and Very-High-Frequencies
IEEE. 2017: 352–59
View details for Web of Science ID 000426933900060
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A Portable Electrostatic Precipitator to Reduce Respiratory Death in Rural Environments
IEEE. 2017
View details for Web of Science ID 000426864800040
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Isolated Resonant DC-DC Converters with a Loosely Coupled Transformer
IEEE. 2017
View details for Web of Science ID 000426864800017
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Implementing an impedance compression network to correct misalignment in a wireless power transfer system
IEEE. 2017
View details for Web of Science ID 000426864800057
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Power Loss of GaN Transistor Reverse Diodes in a High Frequency High Voltage Resonant Rectifier
IEEE. 2017: 1942–45
View details for Web of Science ID 000403242802009
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Universal Line Input Power Factor Preregulator Using VFX Technique
IEEE. 2017: 1810–15
View details for Web of Science ID 000403242801143
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A Unified Model for High-Power, Air-Core Toroidal PCB Inductors
IEEE. 2017
View details for Web of Science ID 000426864800125
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3-D-Printed Air-Core Inductors for High-Frequency Power Converters
IEEE TRANSACTIONS ON POWER ELECTRONICS
2016; 31 (1): 52-64
View details for DOI 10.1109/TPEL.2015.2441005
View details for Web of Science ID 000361908600008
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A Design Methodology for Class-D Resonant Rectifier with Parallel LC Tank
IEEE. 2016
View details for Web of Science ID 000389467400096
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Evaluation of a 900 V SiC MOSFET in a 13.56 MHz 2 kW resonant inverter for wireless power transfer
IEEE. 2016
View details for Web of Science ID 000389467400091
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Comparison of SiC and eGaN devices in a 6.78 MHz 2.2 kW resonant inverter for wireless power transfer
IEEE. 2016
View details for Web of Science ID 000400778402013
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13.56 MHz High Density DC-DC Converter With PCB Inductors
IEEE TRANSACTIONS ON POWER ELECTRONICS
2015; 30 (8): 4291-4301
View details for DOI 10.1109/TPEL.2014.2357398
View details for Web of Science ID 000353128500025
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27.12MHz GaN Resonant Power Converter with PCB Embedded Resonant Air Core Inductors and Capacitors
IEEE. 2015: 4251–56
View details for Web of Science ID 000378882904083
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13.56 MHz 1.3 kW Resonant Converter with GaN FET for Wireless Power Transfer
IEEE. 2015
View details for Web of Science ID 000380542500072
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27.12MHz GaN Bi-directional Resonant Power Converter
IEEE. 2015
View details for Web of Science ID 000380547800005
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Performance evaluation of diodes in 27.12 MHz Class-D resonant rectifiers under high voltage and high slew rate conditions
IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL)
IEEE. 2014
View details for Web of Science ID 000345760200035
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3D Printed Air Core Inductors for High Frequency Power Converters
IEEE. 2014: 971–79
View details for Web of Science ID 000411444300137
- A 13.56 MHz High Density dc-dc Converter with PCB Inductors 2013
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13.56 MHz High Density dc-dc Converter with PCB Inductors
IEEE. 2013: 633–40
View details for Web of Science ID 000324988600100
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27.12 MHz Large Voltage Gain Resonant Converter with Low Voltage Stress
IEEE. 2013: 1820–27
View details for Web of Science ID 000345216902017
- 27.12 MHz large voltage gain resonant converter with low voltage stress 2013
- A Very High Frequency dc-dc Converter Based on a Class 2 Resonant Inverter IEEE Transactions on Power Electronics 2011; 26 (10): 2980-2992
- Opportunities and Challenges in Very High Frequency Power Conversion 2009
- A High-Frequency Resonant Inverter Topology With Low-Voltage Stress IEEE Transactions on Power Electronics 2008; 23 (4): 1759-1771
- Design Considerations for Very High Frequency dc-dc Converters 2006
- New Architectures for Radio-Frequency dc-dc Power Conversion IEEE Transactions on Power Electronics 2006; 21 (2): 380-393
- Performance improvement of alternators with Switched-Mode Rectifers IEEE Transactions on Energy Conversion. 2004; 19 (3): 561-568
- New Architectures for Radio-Frequency dc-dc Power Conversion 2004
- Performance improvement of alternators with switched-mode rectifiers 2003