General Electric Company

Transportation IP Holdings, LLC

Ajith Kuttainnair Kumar

Bret Dwayne Worden

Arvind Kumar Tiwari

Somakumar Ramachandrapanicker

Paul Lloyd Flynn

Arijit Banerjee

Theodore Clark Brown

Rupam Mukherjee

Emil Nikolaev Nikolov

Sudhir Kumar Gupta

Boyanapally Srilatha

Thomas D Stitt

Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on information provided by signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the information. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Systems and methods for diagnosing an engine

A system includes a grid coupled to an electrical bus; an electrical power modulation device coupled to the electrical bus that can output modified electrical power received from the electrical bus; a blower motor coupled to the electrical power modulation device that can receive the modified electrical power output and can provide a stream of air to affect a temperature of the grid, and a controller. A speed of the blower motor may be based at least in part on an amount of the modified electrical power. The controller can receive an operating parameter, and is responsive to that parameter by causing the electrical power modulation device to vary the amount of the modified electrical power. A blower motor speed may be controlled based at least in part on the operating parameter.

Blower system and method

A system includes a grid coupled to an electrical bus; an electrical power modulation device coupled to the electrical bus that can output modified electrical power received from the electrical bus: a blower motor coupled to the electrical power modulation device that can receive the modified electrical power output and can provide a stream of air to affect a temperature of the grid, and a controller. A speed of the blower motor may be based at least in part on an amount of the modified electrical power. The controller can receive an operating parameter, and is responsive to that parameter by causing the electrical power modulation device to vary the amount of the modified electrical power. A blower motor speed may be controlled based at least in part on the operating parameter.

A method and apparatus for controlling an inverter circuit to convert dc voltage to variable amplitude and frequency ac voltage use firing pattern tables which are stored and selected in accordance with a required voltage level for the ac voltage. The firing pattern tables are accessed by writable timers which both address the firing pattern tables and define the times between readout of consecutive entires of the firing pattern tables. If requirements of the ac voltage being produced are changed, a new firing pattern table is selected at the end of the currently selected pattern table. Further, as the required frequency of the ac voltage being produced changes during the readout of a selected firing pattern table, the times written into the writable timers are changed accordingly to vary the frequency of the ac signal on the fly. Angle tables corresponding to the pattern tables are stored and accessed by a control processor to determine the times written into the timers. The angle tables are stored in terms of angles between transitions of the pattern tables and one or more angle tables are provided for each pattern table. The amplitude of the ac voltage being produced is determined by pattern table selection and angle table section, if more than one angle table is provided for a given pattern table, and the frequency of the ac voltage being produced is determined by the time signals generated by the processor.

Inverter control method and apparatus

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Erie, PA, United States of America

Ajith Kuttainnair Kumar