Kusumba
Srujan Kusumba, Fargo, ND US
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20120212162 | METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MOTOR WITH COMPENSATION FOR TIME DELAY IN POSITION DETERMINATION - A sensor detects position data for a rotor of the motor at a first time. A data processor receives the detected position data associated with a first time delay. A sensing circuit senses an analog current at the motor during a second time delay. An analog-to-digital converter converts the analog current to a digital current data during a third time delay. The fourth time delay is detected between actual current reading instant and position reading instant in a data processor. The digital phase current data is transformed into measured direct and quadrature axes control current data based on synchronization or temporal alignment of the position data with the actual measured analog phase current at the starting time by compensating the position data by a sum of the second time delay, the third time delay and the fourth time delay, where the first time delay is subtracted from the sum. | 08-23-2012 |
20120217916 | Device And Method For Generating An Initial Controller Lookup Table For An IPM Machine - Embodiments of the present invention provide a device and method for generating initial operating points for controlling an interior permanent magnet (IPM) machine. The method includes loading an inductance lookup table, first calculating a maximum torque per Ampere (MTPA) trajectory for a first threshold speed based on machine parameters of the IPM machine, second calculating a truncated voltage limit ellipse with monotonically increasing torque for a first speed based on the machine parameters, if the first speed is higher than the first threshold speed, determining an operating trajectory at the first speed based on at least one of the calculated MTPA trajectory and the calculated truncated voltage limit ellipse, and generating an I | 08-30-2012 |
Srujan Kusumba, Louisville, KY US
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20150226195 | METHOD FOR MONITORING A LINEAR COMPRESSOR - A method for monitoring a linear compressor is provided. The method includes determining a velocity dependent induced voltage in a driving coil of the linear compressor, extracting a higher order harmonic from the velocity dependent induced voltage, and establishing that a piston of the linear compressor is crashing if the higher order harmonic is greater than a reference value. | 08-13-2015 |
Subhash Kusumba, Hyderabad IN
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20130245259 | PROCESS FOR THE PREPARATION OF BOSENTAN MONOHYDRATE - The invention relates to improved processes for the preparation of bosentan monohydrate which provide higher yield and purity. | 09-19-2013 |
Vijaya Gopal Kusumba, Andhra Pradesh IN
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20100285075 | Novel Hemioxalate Salt of Eletriptan - The present invention relates to novel hemioxalate salt of eletriptan, process for preparation, pharmaceutical compositions, and method of treating thereof. The present invention relates to solid forms of eletriptan hemioxalate, processes for preparation, pharmaceutical compositions, and method of treating thereof. The solid form of eletriptan hemioxalate is useful for preparing eletriptan free base or a pharmaceutically acceptable salt thereof, particularly eletriptan hydrobromide, in high purity. The present invention also provides a process for preparing substantially pure eletriptan hydrobromide using eletriptan hemioxalate. | 11-11-2010 |
20120027816 | HIGHLY PURE ELETRIPTAN OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF SUBSTANTIALLY FREE OF ELETRIPTAN N-OXIDE IMPURITY - Provided herein is an impurity of eletriptan, eletriptan N-oxide, (R)-5-[2- (phenylsulfonypethyl]-3-[(1-methyl-2-pyrrolidinyl-N-oxide)methyl]-1H-indole, and a process for the preparation and isolation thereof. Provided further herein is a highly pure eletriptan or a pharmaceutically acceptable salt thereof substantially free of eletriptan N-oxide impurity, processes for the preparation thereof, and pharmaceutical compositions comprising highly pure eletriptan or a pharmaceutically acceptable salt thereof substantially free of eletriptan N-oxide impurity. | 02-02-2012 |