Ut-battelle, Inc.

Lockheed Martin Energy Research Corporation

Other

Gm Global Technolgoy Operations, Inc.

Donald Joe Adams

John Sheungchun Hsu

Gui-Jia Su

James Michio Nagashima

Constantin C Stancu

Gregory S Smith

Curtis W Ayers

Douglas S Carlson

Laura D Marlino

Chester Coomer

Fang Zheng Peng

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/converter carrying higher power levels than most of the low power circuits previously taught, and does not require using a heat sink.

Method of making cascaded die mountings with springs-loaded contact-bond options

A power supply generates alternating current and direct current from a constant-voltage source. A multi-phase pulse width modulation voltage source inverter is connected across the source to output multi-phase alternating current. At least one waveform generator is bridged in parallel with the inverter, with each waveform generator outputting zero-sequence waveform current compensated to maintain the multi-phase current within a predetermined tolerance from a desired set point. A rectifier receives the waveform current and generates direct current.

Auxiliary power generation in a motor transformer

Cascaded die mountings with spring-loaded contact-bond options

A method for providing additional dc inputs or outputs ( ) from a dc-to-ac inverter ( ) for controlling motor loads ( ) comprises deriving zero-sequence components (V , V , and V ) from the inverter ( ) through additional circuit branches with power switching devices ( ), transforming the voltage between a high voltage and a low voltage using a transformer or motor ( ), converting the low voltage between ac and dc using a rectifier ( ) or an H-bridge ( ), and providing at least one low voltage dc input or output ( ). The transformation of the ac voltage may be either single phase or three phase. Where less than a 100% duty cycle is acceptable, a two-phase modulation of the switching signals controlling the inverter ( ) reduces switching losses in the inverter ( ). A plurality of circuits for carrying out the invention are also disclosed.

Utilizing zero-sequence switchings for reversible converters

This disclosure provides an integrated thermal management system and methods for managing the cooling of electrical devices and components and the heating and cooling of the passengers' compartment in a hybrid or full electric vehicle to reduce the cost and volume of such systems.

Methods and apparatus for thermal management of vehicle systems and components

A method for making a motor and auxiliary devices with a unified stator body comprises providing a piece of material ( ) having an area larger than a cross section of the stator ( ), removing material from the piece of material ( ) to form a pattern for a cross section of a core ( ) for the stator, and removing material from the piece of material ( ) outside the cross section of the core of the stator ( ) to allow positioning of cores ( ) for supporting windings ( ) of least one additional electromagnetic device, such as a transformer ( ) in a dc-to-dc converter ( ) that provides a low. voltage dc output. An article of manufacture made according to the invention is also disclosed and apparatus made with the method and article of manufacture are also disclosed.

Motor stator using corner scraps for additional electrical components

An isolated and soft-switched power converter is used for DC/DC and DC/DC/AC power conversion. The power converter includes two resonant tank circuits coupled back-to-back through an isolation transformer. Each resonant tank circuit includes a pair of resonant capacitors connected in series as a resonant leg, a pair of tank capacitors connected in series as a tank leg, and a pair of switching devices with anti-parallel clamping diodes coupled in series as resonant switches and clamping devices for the resonant leg. The power converter is well suited for DC/DC and DC/DC/AC power conversion applications in which high-voltage isolation, DC to DC voltage boost, bidirectional power flow, and a minimal number of conventional switching components are important design objectives. For example, the power converter is especially well suited to electric vehicle applications and load-side electric generation and storage systems, and other applications in which these objectives are important. The power converter may be used for many different applications, including electric vehicles, hybrid combustion/electric vehicles, fuel-cell powered vehicles with low-voltage starting, remote power sources utilizing low-voltage DC power sources, such as photovoltaics and others, electric power backup systems, and load-side electric storage and generation systems.

Isolated and soft-switched power converter

A hybrid permanent magnet dc motor includes three sets of permanent magnets supported by the rotor and three sets of corresponding stators fastened to the surrounding frame. One set of magnets operates across a radial gap with a surrounding radial gap stator, and the other two sets of magnets operate off the respective ends of the rotor across respective axial gaps.

Permanent magnet energy conversion machine with magnet mounting

A permanent magnet assembly (22) for assembly in large permanent magnet (PM) motors and generators includes a two-piece carrier (23, 24) that can be slid into a slot (13) in the rotor (10) and then secured in place using a set screw (37). The invention also provides an auxiliary carrier device (50) with guide rails (51) that line up with the teeth (12) of the rotor, so that a permanent magnet assembly (22) can be pushed first into a slot (13), and then down the slot (13) to its proper location. An auxiliary tool (50) is provided to move the permanent magnet assembly (22) into position in the slot (13) before it is secured in place. Methods of assembling and disassembling the magnet assemblies (22) in the rotor (10) are also disclosed.

Growing community of inventors

Knoxville, TN, United States of America

Donald Joe Adams