Patents by Inventor Prasad Kulkarni

Prasad Kulkarni has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250183823
    Abstract: A motor controller that is operable to control a motor includes drive current generation circuitry having an output coupled to the motor. The motor controller further includes a velocity control path. The velocity control path includes angular velocity estimation circuitry having an input adapted to be coupled to the motor, a velocity comparator having first input coupled to a target velocity input and a second input coupled to an output of the angular velocity estimation circuitry, and an adaptive velocity controller having a first input coupled to an output of the velocity comparator and having an output coupled to a first input of the drive current generation circuitry. The motor controller further includes controller parameter determination circuitry having a first input coupled to the output of the angular velocity estimation circuitry and having an output coupled to a second input of the adaptive velocity controller.
    Type: Application
    Filed: January 7, 2025
    Publication date: June 5, 2025
    Inventors: Sameer Pradeep Kulkarni, Prasad Kulkarni, Ganapathi Hegde
  • Patent number: 12212270
    Abstract: A motor controller that is operable to control a motor includes drive current generation circuitry having an output coupled to the motor. The motor controller further includes a velocity control path. The velocity control path includes angular velocity estimation circuitry having an input adapted to be coupled to the motor, a velocity comparator having first input coupled to a target velocity input and a second input coupled to an output of the angular velocity estimation circuitry, and an adaptive velocity controller having a first input coupled to an output of the velocity comparator and having an output coupled to a first input of the drive current generation circuitry. The motor controller further includes controller parameter determination circuitry having a first input coupled to the output of the angular velocity estimation circuitry and having an output coupled to a second input of the adaptive velocity controller.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: January 28, 2025
    Assignee: Texas Instruments Incorporated
    Inventors: Sameer Pradeep Kulkarni, Prasad Kulkarni, Ganapathi Hegde
  • Patent number: 12170495
    Abstract: Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
    Type: Grant
    Filed: April 3, 2023
    Date of Patent: December 17, 2024
    Assignee: Texas Instruments Incorporated
    Inventors: Prasad Kulkarni, Venkata Pavan Mahankali, Ganapathi Hegde
  • Publication number: 20240380343
    Abstract: In some examples, an apparatus includes a filter having first and second inputs, a current signal input, and an output. The apparatus also includes a speed observer having a voltage signal input, a current signal input, and an output, the output of the speed observer coupled to the second input of the filter. The apparatus also includes a ripple counter having an input and an output, the input of the ripple counter coupled to the output of the filter. The apparatus also includes a ripple processor having first and second inputs, and an output, the first input of the ripple processor coupled to the output of the ripple counter, the second input of the ripple processor coupled to the output of the speed observer, and the output of the ripple processor coupled to the first input of the filter.
    Type: Application
    Filed: October 27, 2023
    Publication date: November 14, 2024
    Inventors: Vikram Dilip DANGE, Venkata Naresh KOTIKELAPUDI, Prasad KULKARNI
  • Patent number: 12081158
    Abstract: A method for determining a position of a rotor of a brushless direct current (BLDC) motor at standstill. The method includes providing a plurality of current pulses to a plurality of windings of the BLDC motor while the rotor of the BLDC motor is at a standstill position. The method further includes measuring a plurality of times that it takes for the plurality of current pulses to reach a threshold for respective ones of the plurality of windings. A first position corresponding to a shortest time of the plurality of times is determined. A position detection value is determined based on the shortest time and based on times corresponding to positions that are adjacent to the first position. A position of the rotor at the standstill position is determined based on the position detection value and an interpolation function.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: September 3, 2024
    Assignee: Texas Instruments Incorporated
    Inventors: Prasad Kulkarni, Sameer Pradeep Kulkarni, Venkata Pavan Mahankali
  • Publication number: 20240283785
    Abstract: Various methods, apparatuses/systems, and media for optimizing user experience for a customer who is interacting with an authorization server are disclosed. A resource server provides corresponding context information when passing the customer to an authorization server. The context information is used by the authorization server to identify the customer in context, and once identified, the authorization server determines whether the customer has credentials or not. When it is determined that the customer is not a new customer and has credentials, he/she is prompted to login. When it is determined that the customer is a new customer, he/she is prompted to create an account first and then create digital identity and associated credentials. Existing customer without credentials is prompted to follow a registration flow to provision credentials. Once credentials have been created, the customer is automatically logged in and the authorization flow continues to a consent step for completing a transaction.
    Type: Application
    Filed: February 14, 2024
    Publication date: August 22, 2024
    Applicant: JPMorgan Chase Bank, N.A.
    Inventors: Neill CLAYTON-SMITH, Vikrant KSHIRSAGAR, Parul PATIDAR, Prasad KULKARNI, Alain DEMOUR
  • Publication number: 20240242594
    Abstract: A method of setting the address of an addressable network device of a building management system comprises: at the point of installation of the device on a network wiring of the system, operating a code scanner of an installation tool to scan a code on the device, the information in the code including the serial number of the device; collecting location information in the installation tool at the point of installation; connecting the installation tool to a wiring commissioning tool after the device has been installed; downloading the code information and the location information onto the wiring commissioning tool; generating a network address for the device; and setting that network address into the device via the network wiring.
    Type: Application
    Filed: May 16, 2022
    Publication date: July 18, 2024
    Inventors: Prasad KULKARNI, Praveen DESHPANDE, Faruk MEAH, Nikhil KULKARNI, Vishal BHOSALE
  • Patent number: 11916496
    Abstract: A motor controller is operable to control a motor. The motor has a first terminal and the motor controller includes an angular velocity transmission path having an input and an output. A current generator includes a velocity-torque input, an angular position input, and a motor drive output. The velocity-torque input is coupled to the output of the angular velocity transmission path. An angular velocity feedback path is coupled between a first terminal and a first location on the angular velocity transmission path. The first location is between the input and the output of the angular velocity transmission path. A current feedback path is coupled between the first terminal and a second location on the angular velocity transmission path. The second location is disposed between the first location on the angular velocity transmission path and the velocity-torque input of the current generator.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: February 27, 2024
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Prasad Kulkarni, Venkata Pavan Mahankali
  • Patent number: 11894795
    Abstract: Example systems and processes use three-phase vector mutual inductance analysis to detect zero-crossing (ZC) locations of back-electromotive force (BEMF) of an electric motor and to detect its commutation points during start-up or low-speed operation. For each sector of rotation of the rotor, two pairs of three-phase vectors are applied, along with current for the corresponding driving phase. The first pair is alternately applied to move the rotor, and the mutual inductances resulting from such application are compared to detect the zero-crossing (ZC) location in the BEMF of the electric motor in that sector. The second pair is then alternately applied within the same sector to continue to move the rotor, and the mutual inductances from such application are compared to detect the commutation point of the electric motor in that sector. The process may be repeated for each successive sector, changing the driving current at each new sector.
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: February 6, 2024
    Assignee: Texas Instruments Incorporated
    Inventors: Venkata Pavan Mahankali, Prasad Kulkarni, Ganapathi Hegde, Sameer Kulkarni
  • Patent number: 11876471
    Abstract: A motor controller integrated circuit (IC) includes a storage device containing software. The IC also includes a processor core coupled to the storage device. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to implement a resonant controller at a frequency that is a harmonic of a speed of a motor.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: January 16, 2024
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Prasad Kulkarni
  • Publication number: 20240007035
    Abstract: A motor controller adapted to be coupled to a motor having a rotor. The motor controller includes a storage device containing software. The motor controller also includes a processor core coupled to the storage device and adapted to be coupled to the motor. The processor core is configured to operate the motor in an open-loop control in response to determining a speed of the rotor determined based on an inverse exponential function with respect to time.
    Type: Application
    Filed: June 29, 2022
    Publication date: January 4, 2024
    Inventors: Sameer KULKARNI, Prasad KULKARNI, Ganapathi HEGDE
  • Patent number: 11817805
    Abstract: In some examples, an apparatus operable to drive a motor includes driver circuitry adapted to be coupled to the motor and processing logic coupled to the driver circuitry. The processing logic is operable to determine an expected current for controlling the motor, reduce a reference current upon which the motor is controlled from a first value to a second value at an exponential rate, determine that a measured current of the motor is approximately equal to the expected current, and responsive to determining that the measured current of the motor is approximately equal to the expected current, provide a control signal to the driver circuitry based on the expected current to the motor to control the motor to operate according to closed loop control.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: November 14, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Prasad Kulkarni, Sameer Pradeep Kulkarni, Krushal Shah
  • Publication number: 20230353072
    Abstract: Example systems and processes use three-phase vector mutual inductance analysis to detect zero-crossing (ZC) locations of back-electromotive force (BEMF) of an electric motor and to detect its commutation points during start-up or low-speed operation. For each sector of rotation of the rotor, two pairs of three-phase vectors are applied, along with current for the corresponding driving phase. The first pair is alternately applied to move the rotor, and the mutual inductances resulting from such application are compared to detect the zero-crossing (ZC) location in the BEMF of the electric motor in that sector. The second pair is then alternately applied within the same sector to continue to move the rotor, and the mutual inductances from such application are compared to detect the commutation point of the electric motor in that sector. The process may be repeated for each successive sector, changing the driving current at each new sector.
    Type: Application
    Filed: April 28, 2022
    Publication date: November 2, 2023
    Inventors: Venkata Pavan Mahankali, Prasad Kulkarni, Ganapathi Hegde, Sameer Kulkarni
  • Patent number: 11764710
    Abstract: A motor controller integrated circuit (IC) includes a storage device containing software, and a processor core. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to operate the motor in an open-loop control, calculate first and second orthogonal components of a back electromotive force (BEMF), calculate a total BEMF value, and determine that the first orthogonal component is within a threshold of the total BEMF value. The processor core is further configured to, responsive to the first orthogonal component being within the threshold of the total BEMF value, operate the motor in a closed-loop control.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: September 19, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Prasad Kulkarni, Venkata Pavan Mahankali, Ganapathi Hegde
  • Patent number: 11756391
    Abstract: The present invention relates to a voice alarm device which forms part of a fire alarm system loop. Upon detection of a fire, a control panel instructs appropriate voice alarm devices to retrieve relevant audio from local storage and output the audio via a local speaker.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: September 12, 2023
    Assignee: JOHNSON CONTROLS FIRE PROTECTION LP
    Inventors: Praveen Deshpande, Faruk Meah, Prasad Kulkarni
  • Patent number: 11728751
    Abstract: A controller is adapted to be coupled to a brushless direct current (DC) motor and includes an analog-to-digital converter (ADC), a computing device, and a driver. The ADC is configured to receive an analog back electromotive force (BEMF) waveform from the brushless DC motor and sample the analog BEMF waveform to produce a digital BEMF waveform. The computing device is coupled to the ADC and is configured to receive the digital BEMF waveform and determine a position and a speed of the rotor based on the digital BEMF waveform. The driver is coupled to the ADC and the computing device and is configured to receive the position and the speed of the rotor and provide a drive signal based on the position and the speed of the rotor of the brushless DC motor.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: August 15, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Ganapathi Hegde, Prasad Kulkarni, Venkata Pavan Mahankali, Sameer Pradeep Kulkarni
  • Publication number: 20230238904
    Abstract: Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
    Type: Application
    Filed: April 3, 2023
    Publication date: July 27, 2023
    Inventors: Prasad Kulkarni, Venkata Pavan Mahankali, Ganapathi Hegde
  • Publication number: 20230134551
    Abstract: In some examples, an apparatus operable to drive a motor includes driver circuitry adapted to be coupled to the motor and processing logic coupled to the driver circuitry. The processing logic is operable to determine an expected current for controlling the motor, reduce a reference current upon which the motor is controlled from a first value to a second value at an exponential rate, determine that a measured current of the motor is approximately equal to the expected current, and responsive to determining that the measured current of the motor is approximately equal to the expected current, provide a control signal to the driver circuitry based on the expected current to the motor to control the motor to operate according to closed loop control.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 4, 2023
    Inventors: Prasad KULKARNI, Sameer Pradeep KULKARNI, Krushal SHAH
  • Patent number: 11621661
    Abstract: Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
    Type: Grant
    Filed: July 23, 2021
    Date of Patent: April 4, 2023
    Assignee: Texas Instruments Incorporated
    Inventors: Prasad Kulkarni, Venkata Pavan Mahankali, Ganapathi Hegde
  • Patent number: 11615680
    Abstract: A voice alarm notification device of a fire alarm system, comprising: a network port for receiving an alarm notification signal; an audio file library in which the audio files include audio voice message files; a speaker; a processor unit connected to the network port for processing an alarm notification signal and for selecting one of the audio files from the library to be played through the speaker; and a Bluetooth module for establishing a Bluetooth communication link to the voice alarm notification device, via which link an audio voice file can be received. The device is arranged to add the audio voice file received via the Bluetooth communication link to the library so as to be available for selection by the processor unit when it receives an alarm notification signal.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 28, 2023
    Assignee: JOHNSON CONTROLS FIRE PROTECTION LP
    Inventors: Sonali Date, Praveen Deshpande, Prasad Kulkarni, Faruk Meah