Patents by Inventor Santosh Manjunath BHANDARKAR
Santosh Manjunath BHANDARKAR 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).
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Publication number: 20230024604Abstract: Foreign object detection for wireless power transmission and related systems, methods, and devices are disclosed. A controller for a wireless power transmitter is to determine a transmit coil voltage potential at a transmit coil of the wireless power transmitter, determine an input power provided to the wireless power transmitter, determine a transmitter power loss, and determine a transmitted power of the wireless power transmitted to the wireless power receiver based, at least in part, on the input power and the transmitter power loss. The controller is also to compute a power loss responsive to the transmitted power and a received power indicated by the wireless power receiver, and determine that a foreign object is detected responsive to a determination that the power loss is greater than a predetermined threshold.Type: ApplicationFiled: July 21, 2022Publication date: January 26, 2023Inventor: Santosh Manjunath Bhandarkar
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Patent number: 11070091Abstract: In a wireless power transfer system for supplying power to a wireless device, e.g., charging a battery, wireless power transmitter coil voltage is used in place of coil current for communication and power control reference. The transmitter coil voltage waveforms provide phase information, with reference to the pulse width modulation (PWM) waveforms, that can be used to demodulate digital packet communication from a wireless power receiver used to provide a voltage to a device. The DC voltage amplitude of the wireless power transmitter coil is used for controlling the power injected to the wireless power receiver coil, while the phase of the transmitter coil voltage PWM signal is used for demodulation of signal packets from the wireless power receiver to control the transmitter coil voltage and thereby wireless power transfer to the power receiver.Type: GrantFiled: December 30, 2019Date of Patent: July 20, 2021Assignee: MICROCHIP TECHNOLOGY INCORPORATEDInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20210099016Abstract: In a wireless power transfer system for supplying power to a wireless device, e.g., charging a battery, wireless power transmitter coil voltage is used in place of coil current for communication and power control reference. The transmitter coil voltage waveforms provide phase information, with reference to the pulse width modulation (PWM) waveforms, that can be used to demodulate digital packet communication from a wireless power receiver used to provide a voltage to a device. The DC voltage amplitude of the wireless power transmitter coil is used for controlling the power injected to the wireless power receiver coil, while the phase of the transmitter coil voltage PWM signal is used for demodulation of signal packets from the wireless power receiver to control the transmitter coil voltage and thereby wireless power transfer to the power receiver.Type: ApplicationFiled: December 30, 2019Publication date: April 1, 2021Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 10784766Abstract: Adaptive slope compensation for current mode control in a switch mode power supply converter is computed for every switching cycle based upon the input voltage and duty-cycle whereby the quality factor is maintained at a constant value. A digital signal processing (DSP) capable microcontroller comprises a voltage loop compensator and generates a desired current reference for every switching cycle. Slope calculations are adapted for switching frequency, inductance value, current circuit gain, etc. The slope calculation result is applied to a pulse-digital-modulation (PDM) digital-to-analog converter (DAC) capable of changing its output levels at a very fast rate compared to the power supply switching frequency whereby the required current slope is provided within the switching period. Actual inductor current may be used to compare against the slope reference, thereby taking care of changes in the inductance values under load. The slope levels are automatically changed when the switching frequency is changed.Type: GrantFiled: May 31, 2019Date of Patent: September 22, 2020Assignee: MICROCHIP TECHNOLOGY INCORPORATEDInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 10727735Abstract: A circuit arrangement, signal processor, and method for interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an alternating input voltage from a power supply; an output to provide an output voltage to a load; a first interleaved circuit comprising: a first energy storage device; and a first controllable switching device; and one or more secondary interleaved circuits, each comprising: a secondary energy storage device; and a secondary controllable switching device; and a signal processor.Type: GrantFiled: August 1, 2018Date of Patent: July 28, 2020Assignee: MICROCHIP TECHNOLOGY INCORPORATEDInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20200083794Abstract: Adaptive slope compensation for current mode control in a switch mode power supply converter is computed for every switching cycle based upon the input voltage and duty-cycle whereby the quality factor is maintained at a constant value. A digital signal processing (DSP) capable microcontroller comprises a voltage loop compensator and generates a desired current reference for every switching cycle. Slope calculations are adapted for switching frequency, inductance value, current circuit gain, etc. The slope calculation result is applied to a pulse-digital-modulation (PDM) digital-to-analog converter (DAC) capable of changing its output levels at a very fast rate compared to the power supply switching frequency whereby the required current slope is provided within the switching period. Actual inductor current may be used to compare against the slope reference, thereby taking care of changes in the inductance values under load. The slope levels are automatically changed when the switching frequency is changed.Type: ApplicationFiled: May 31, 2019Publication date: March 12, 2020Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 10491106Abstract: A circuit arrangement, a signal processor, and a method of interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an input voltage from a power supply; an output to provide an output voltage to a load; a first interleaved circuit comprising a first energy storage device and a first controllable switching device; one or more secondary interleaved circuits, each comprising a secondary energy storage device, and a secondary controllable switching device; and a signal processor, connected to the controllable switching devices. The signal processor comprises a first switching cycle controller, configured for cycled zero-current switching operation of the first controllable switching device; and one or more secondary switching cycle controllers, configured for cycled zero-current switching operation of the secondary controllable switching devices.Type: GrantFiled: August 1, 2018Date of Patent: November 26, 2019Assignee: MICROCHIP TECHNOLOGY INCORPORATEDInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 10491131Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device, wherein the signal processor is further configured to determine at least one switching point for the zero-current switching from a first voltage signal and a second voltage signal, wherein the first voltage signal corresponds to the input voltage and the second voltage signal corresponds to the output voltage.Type: GrantFiled: August 1, 2018Date of Patent: November 26, 2019Assignee: Microchip Technology LimitedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 10432085Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device. The signal processor is further configured to determine an on-time period for the switching device in one or more switching cycles based on the output voltage and the output of a crossover frequency control module to provide an improved transient response characteristic of the circuit arrangement.Type: GrantFiled: October 19, 2018Date of Patent: October 1, 2019Assignee: MICROCHIP TECHNOLOGY INCORPORATEDInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20190199204Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device. The signal processor is further configured to determine an on-time period for the switching device in one or more switching cycles based on the output voltage and the output of a crossover frequency control module to provide an improved transient response characteristic of the circuit arrangement.Type: ApplicationFiled: October 19, 2018Publication date: June 27, 2019Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20190052168Abstract: A circuit arrangement, signal processor, and method for interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an alternating input voltage from a power supply; an output to provide an output voltage to a load; a first interleaved circuit comprising: a first energy storage device; and a first controllable switching device; and one or more secondary interleaved circuits, each comprising: a secondary energy storage device; and a secondary controllable switching device; and a signal processor.Type: ApplicationFiled: August 1, 2018Publication date: February 14, 2019Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20190052179Abstract: A circuit arrangement for switched boundary mode power conversion, a corresponding signal processor and a method of switched boundary mode power conversion are provided. The circuit arrangement comprises an input for receiving an input voltage from a power supply, an output to provide an output voltage to a load, an energy storage device, a controllable switching device, and a signal processor. The signal processor is connected to the controllable switching device and being configured for zero-current switching of the switching device, wherein the signal processor is further configured to determine at least one switching point for the zero-current switching from a first voltage signal and a second voltage signal, wherein the first voltage signal corresponds to the input voltage and the second voltage signal corresponds to the output voltage.Type: ApplicationFiled: August 1, 2018Publication date: February 14, 2019Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Publication number: 20190052169Abstract: A circuit arrangement, a signal processor, and a method of interleaved switched boundary mode power conversion are disclosed. The circuit arrangement comprises at least an input for receiving an input voltage from a power supply; an output to provide an output voltage to a load; a first interleaved circuit comprising a first energy storage device and a first controllable switching device; one or more secondary interleaved circuits, each comprising a secondary energy storage device, and a secondary controllable switching device; and a signal processor, connected to the controllable switching devices. The signal processor comprises a first switching cycle controller, configured for cycled zero-current switching operation of the first controllable switching device; and one or more secondary switching cycle controllers, configured for cycled zero-current switching operation of the secondary controllable switching devices.Type: ApplicationFiled: August 1, 2018Publication date: February 14, 2019Applicant: Microchip Technology IncorporatedInventors: Santosh Manjunath Bhandarkar, Alex Dumais
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Patent number: 9490690Abstract: Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal and measured power values are automatically computed according to the measured voltages, the operating frequency and nominal capacitance values, and power change values are calculated based on the difference between the measured and calculated nominal power values, and the change values are evaluated to selectively identify filter capacitor degradation conditions in the filter circuit.Type: GrantFiled: March 11, 2014Date of Patent: November 8, 2016Assignee: Rockwell Automation Technologies, Inc.Inventors: Santosh Manjunath Bhandarkar, Sinuhe Imuris Benitez Escobar
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Patent number: 9488686Abstract: Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal current values are automatically computed according to the measured voltages, the operating frequency and nominal capacitance values, and current change values are calculated based on the difference between the measured currents and the calculated nominal currents, and the change values are evaluated to selectively identify filter capacitor degradation conditions in the filter circuit.Type: GrantFiled: February 24, 2014Date of Patent: November 8, 2016Assignee: Rockwell Automation Technologies, Inc.Inventors: Santosh Manjunath Bhandarkar, Sinuhe Imuris Benitez Escobar
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Publication number: 20150263600Abstract: Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal and measured power values are automatically computed according to the measured voltages, the operating frequency and nominal capacitance values, and power change values are calculated based on the difference between the measured and calculated nominal power values, and the change values are evaluated to selectively identify filter capacitor degradation conditions in the filter circuit.Type: ApplicationFiled: March 11, 2014Publication date: September 17, 2015Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.Inventors: SANTOSH MANJUNATH BHANDARKAR, SINUHE IMURIS BENITEZ ESCOBAR
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Publication number: 20150241503Abstract: Methods and apparatus are presented for detecting filter capacitor degradation in a power converter in which filter circuit branch currents and voltages are concurrently measured, nominal current values are automatically computed according to the measured voltages, the operating frequency and nominal capacitance values, and current change values are calculated based on the difference between the measured currents and the calculated nominal currents, and the change values are evaluated to selectively identify filter capacitor degradation conditions in the filter circuit.Type: ApplicationFiled: February 24, 2014Publication date: August 27, 2015Applicant: Rockwell Automation Technologies, Inc.Inventors: Santosh Manjunath BHANDARKAR, Sinuhe Imuris BENITEZ ESCOBAR