-
公开(公告)号：US20230024604A1
公开(公告)日：2023-01-26
申请号：US17814181
申请日：2022-07-21
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar
Abstract: 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.
-
2.发明授权公开(公告)号：US10432085B2
公开(公告)日：2019-10-01
申请号：US16165384
申请日：2018-10-19
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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.
-
公开(公告)号：US11070091B2
公开(公告)日：2021-07-20
申请号：US16730264
申请日：2019-12-30
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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.
-
公开(公告)号：US20190052169A1
公开(公告)日：2019-02-14
申请号：US16052026
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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. The signal processor is configured to control, in a given switching cycle, an on-time period of each of the secondary controllable switching devices to correspond to an on-time period of the first controllable switching device. The signal processor is further configured to control phases between the on-time periods of the first and the one or more secondary switching controllers, so that the on-time periods are distributed over the given switching cycle to reduce an overall current ripple at the input.
-
公开(公告)号：US12074455B2
公开(公告)日：2024-08-27
申请号：US17814181
申请日：2022-07-21
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20190052179A1
公开(公告)日：2019-02-14
申请号：US16052208
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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.
-
7.发明申请公开(公告)号：US20190052168A1
公开(公告)日：2019-02-14
申请号：US16051872
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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. The signal processor is connected to the controllable switching devices and comprises at least 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 one or more secondary controllable switching devices The signal processor is configured to disable one or more of the interleaved circuits when the alternating input voltage is lower than a first threshold voltage to reduce the zero-crossing time.
-
公开(公告)号：US20210099016A1
公开(公告)日：2021-04-01
申请号：US16730264
申请日：2019-12-30
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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.
-
公开(公告)号：US10784766B2
公开(公告)日：2020-09-22
申请号：US16428094
申请日：2019-05-31
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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.
-
10.发明授权公开(公告)号：US10727735B2
公开(公告)日：2020-07-28
申请号：US16051872
申请日：2018-08-01
Applicant: Microchip Technology Incorporated
Inventor： Santosh Manjunath Bhandarkar , Alex Dumais
Abstract: 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. The signal processor is connected to the controllable switching devices and comprises at least 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 one or more secondary controllable switching devices The signal processor is configured to disable one or more of the interleaved circuits when the alternating input voltage is lower than a first threshold voltage to reduce the zero-crossing time.
-
-
-
-
-
-
-
-
-
Search Results
12
records
(took 0.013 seconds)
