Patents by Inventor Prasanth VENUGOPAL
Prasanth VENUGOPAL 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: 20230361566Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.Type: ApplicationFiled: July 13, 2023Publication date: November 9, 2023Applicant: WiTricity CorporationInventors: Marcel Fischer, Mircea-Florian Vancu, Hans Peter Widmer, Prasanth Venugopal
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Patent number: 11728647Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.Type: GrantFiled: September 15, 2022Date of Patent: August 15, 2023Assignee: WiTricity CorporationInventors: Marcel Fischer, Mircea-Florian Vancu, Hans Peter Widmer, Prasanth Venugopal
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Publication number: 20230010790Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.Type: ApplicationFiled: September 15, 2022Publication date: January 12, 2023Applicant: WiTricity CorporationInventors: Marcel Fischer, Mircea-Florian Vancu, Hans Peter Widmer, Prasanth Venugopal
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Patent number: 11482921Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.Type: GrantFiled: May 3, 2019Date of Patent: October 25, 2022Assignee: WiTricity CorporationInventors: Marcel Fischer, Mircea-Florian Vancu, Hans Peter Widmer, Prasanth Venugopal
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Publication number: 20200350816Abstract: Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.Type: ApplicationFiled: May 3, 2019Publication date: November 5, 2020Applicant: WiTricity CorporationInventors: Marcel Fischer, Mircea-Florian Vancu, Hans Peter Widmer, Prasanth Venugopal
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Patent number: 10771033Abstract: Certain aspects of the present disclosure are generally directed to apparatus for attenuating unwanted frequencies using a feed line with integrated filtering. In certain aspects, a feed line for filtering unwanted frequencies in a wireless power transfer system is provided, the feed line including a first end, wherein the first end is configured to connect to a power source that generates a driving signal having a driving signal frequency, and a second end, wherein the second end is configured to connect to a wireless power transfer element configured to wirelessly transmit power. The feed line further includes a conductor core, wherein the conductor core is configured to transfer the driving signal from the power source to the wireless transfer element. The feed line further includes an integrated filter configured to attenuate at least one frequency generated by the wireless power transfer system.Type: GrantFiled: June 19, 2018Date of Patent: September 8, 2020Assignee: WiTricity CorporationInventors: Prasanth Venugopal, Martin Pavlovsky, Nicholas Athol Keeling, Stefan Raabe, Daniel Kuerschner, Roman Heinrich, Simon Islinger
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Publication number: 20190386628Abstract: Certain aspects of the present disclosure are generally directed to apparatus for attenuating unwanted frequencies using a feed line with integrated filtering. In certain aspects, a feed line for filtering unwanted frequencies in a wireless power transfer system is provided, the feed line including a first end, wherein the first end is configured to connect to a power source that generates a driving signal having a driving signal frequency, and a second end, wherein the second end is configured to connect to a wireless power transfer element configured to wirelessly transmit power. The feed line further includes a conductor core, wherein the conductor core is configured to transfer the driving signal from the power source to the wireless transfer element. The feed line further includes an integrated filter configured to attenuate at least one frequency generated by the wireless power transfer system.Type: ApplicationFiled: June 19, 2018Publication date: December 19, 2019Inventors: Prasanth VENUGOPAL, Martin PAVLOVSKY, Nicholas Athol KEELING, Stefan RAABE, Daniel KUERSCHNER, Roman HEINRICH, Simon ISLINGER