Juan Miguel Rivas

US Patent:

20200378372, Dec 3, 2020

Filed:

Mar 23, 2018

Appl. No.:

16/496531

Inventors:

- Stanford CA, US
- Canberra, ACT, AU
Juan M. Rivas Davila - Palo Alto CA, US
Roderick Boswell - Canberra, ACT, AU
Christine Charles - Canberra, ACT, AU

International Classification:

F03H 1/00
B64G 1/42
B64G 1/40
B64G 1/10

Abstract:

According to certain aspects, an electric-propulsion thruster is used as part of a base or platform which also includes a power converter, having a plurality of inductors and other electrical components, and a printed circuit board (PCB). The PCB includes a layer at which the other electrical components and printed circuit inductor traces, for the plurality of inductors, are secured. The electric-propulsion thruster includes a housing (e.g., as part of the base or platform) providing a cavity and having at least one structurally-rigid side wall along the cavity, where the PCB is integrated with the electric-propulsion thruster for a compact arrangement which can be used to propel the apparatus. Such a compact design might be used as an important part of thruster spacecraft architecture such as micro-satellites (e.g., CubeSats).

US Patent:

20200313560, Oct 1, 2020

Filed:

Jun 26, 2017

Appl. No.:

16/311016

Inventors:

- Stanford CA, US
Wei Liang - Stanford CA, US
Juan M. Rivas Davila - Palo Alto CA, US

International Classification:

H02M 3/335
H02M 1/08

Abstract:

A resonant DC-DC converter for generating high voltage MHz bi-polar DC pulses includes a left multi-level resonant rectifier bank [] connected to a positive electrode [] and coupled via capacitive isolation to a left RF amplifier terminal []; a right multi-level resonant rectifier bank [] connected to a negative electrode [] and coupled via capacitive isolation to a right RF amplifier terminal []. Each multi-level resonant rectifier bank comprises multiple resonant rectifier stages [-], where each stage comprises two capacitors for capacitively isolating the stage, an output capacitor, a MOSFET switch connected to an adjacent MOSFET switch of an adjacent stage, and a gating resonant circuit connected to the MOSFET switch, whereby MOSFET switches in the banks can be passively controlled by RF signals from a left RF amplifier and a right RF amplifier.

US Patent:

20190334441, Oct 31, 2019

Filed:

Feb 11, 2019

Appl. No.:

16/272393

Inventors:

- Stanford CA, US
Wei Liang - Stanford CA, US
Juan M. Rivas Davila - Palo Alto CA, US

International Classification:

H02M 3/28

Abstract:

Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.

US Patent:

20190013670, Jan 10, 2019

Filed:

Jul 9, 2018

Appl. No.:

16/030235

Inventors:

- Palo Alto CA, US
Ram Rajagopal - Palo Alto CA, US
Claudio Rivetta - Palo Alto CA, US
Juan M. Rivas Davila - Palo Alto CA, US

International Classification:

H02J 3/14
H02J 3/38
H02H 3/093
H01H 85/02

Abstract:

Improved control of electrical power consumption is provided with “Smart Dim Fuses” (SDF) which can alter their output voltage as provided to the load circuits they are connected to. SDF units can replace conventional circuit breakers in electrical panels. The voltage control capability provided by SDF units can lead to improved control of electrical power consumption, since many loads can smoothly operate at lower power consumption when the voltage they are driven with decreases. SDF units can comply with relevant safety requirements, such as uninterrupted neutral connections between electrical mains and load circuits. SDF units can also provide a current limiting function that can substitute for the protective action of conventional circuit breakers.

US Patent:

20170012535, Jan 12, 2017

Filed:

Jun 30, 2016

Appl. No.:

15/199326

Inventors:

- Palo Alto CA, US
Wei Liang - Stanford CA, US
Juan M. Rivas Davila - Palo Alto CA, US

International Classification:

H02M 3/24
H02M 1/08

Abstract:

Resonant power converters that replace the conventional impedance matching stage with series or parallel connections between resonant inverters and resonant rectifiers are provided. Two or more resonant rectifiers can be connected in series or in parallel to the resonant inverter to provide impedance matching. Similarly, two or more resonant inverters can be connected in series or in parallel to the resonant rectifier to provide impedance matching. Electrical isolation of DC voltage between input and output is provided using only capacitors.