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Flett
Fred Flett, Indio, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100322284 | Method For Determining Power Semiconductor Temperature - A method for determining power semiconductor operating temperatures uses a database of measured temperatures. Each temperature is associated with operating conditions and determined by laboratory testing in an environment indicative of operation of the power semiconductors actual operations. | 12-23-2010 |
Fred Flett, Bloomfield, MI US
| Patent application number | Description | Published |
|---|---|---|
| 20080205089 | DC/DC CONVERTER - Power converter system topologies comprise a DC/DC converter. The DC/DC converter includes a transformer coupling a high side to a low side. The high side may include an inverter bridge in the form of an inverter module and an inductor. The low side may include a rectifier in the form of a rectifier module and a pair of inductors. The transformer may take the form of a planar transformer. | 08-28-2008 |
| 20080303138 | INSULATED GATE BIPOLAR TRANSISTOR - An insulated gate bipolar transistor includes bump pad connectors to provide thermal contact with a heat spreader for dissipating heat away form the insulated gate bipolar transistor. | 12-11-2008 |
| 20090012739 | METHOD FOR DETERMINING POWER SEMICONDUCTOR TEMPERATURE - A method for determining power semiconductor operating temperatures uses a database of measured temperatures. Each temperature is associated with operating conditions and determined by laboratory testing in an environment indicative of operation of the power semiconductors actual operations. | 01-08-2009 |
| 20090067109 | OPERATING AND CONTROLLING INSULATED GATE BIPOLAR TRANSISTORS IN HIGH SPEED FAILURE MODE SITUATIONS - A circuit and method to provide dynamic fault protection to transistors are disclosed. The fault protection may be particularly suited for protecting insulated gate bipolar transistors (IGBTs). | 03-12-2009 |
Frederick P. Flett, Indio, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100133025 | Expandable Energy Storage Control System Architecture - A hybrid electric vehicle drive system comprises a first power bus electrically coupled to a motive power subsystem and a drive wheel propulsion assembly; a second power bus electrically coupled to the first power bus and a plurality of energy storage subsystems, wherein the first power bus is configured to allow electrical power to be transmitted among the motive power subsystem, the drive wheel propulsion assembly, and the second power bus, and wherein the second power bus is configured to allow electrical power to be transmitted among the plurality of energy storage subsystems and the first power bus. | 06-03-2010 |
| 20110100735 | Propulsion Energy Storage Control System and Method of Control - A propulsion energy storage control system and method of control interspersed between a heavy duty hybrid-electric drive system and its propulsion energy storage. The control system having an energy storage DC bus, electrical interfaces to the drive system and a plurality of propulsion energy storage subsystems, DC-to-DC converters at each interface, and a controller configured to operate each DC-to-DC converter independently such that power flow may charge, discharge, and shuttle between the plurality of propulsion energy storage subsystems. | 05-05-2011 |
Graham Flett, Dundee GB
| Patent application number | Description | Published |
|---|---|---|
| 20100331014 | NAVIGATION SYSTEM AND METHOD - A navigation system and method which provides direction to visitors in buildings or groups of buildings. The system includes a check-in computer for recording identification information and destination information of a person upon entry into a building, for interrogating a wireless communicator associated with the person to obtain a wireless identifier, and for storing the identification information, the destination information, and the wireless identifier in a record. The system further includes a plurality of navigation stations for receiving the wireless identifier along a route of the person, for determining directions to a next navigation station along the route based upon the destination information in the record, and for providing the directions to the person. | 12-30-2010 |
Magnus Flett, Wakefield GB
| Patent application number | Description | Published |
|---|---|---|
| 20110106095 | DRILL GUIDE ASSEMBLY - A drill guide assembly for determining the axis for drilling a bore in a generally dome-shaped bone to receive a component of an orthopaedic joint prosthesis is described. The drill guide assembly includes a drill guide sleeve, a carriage and a platform. The drill guide sleeve is mounted in the carriage towards a first end so that the angular orientation of the drill guide sleeve relative to the carriage can be adjusted about at least one axis. The carriage includes at least one threaded angle-adjustment screw which extends between the carriage and the drill guide sleeve by which the angular orientation of the drill guide sleeve can be adjusted. The platform is fastenable to the bone, and includes at least three feet depending from the platform to engage the surface of the bone with the bone extending towards the platform into the space between the feet. | 05-05-2011 |