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公开(公告)号：US10317484B2
公开(公告)日：2019-06-11
申请号：US15517132
申请日：2015-10-08
发明人： Viswanathan Kanakasabai , Adnan Kutubuddin Bohori , Rajendra Naik , Suma Memana Narayana Bhat , Arun Kumar Raghunathan
IPC分类号： G01V3/00 , G01R33/385 , A61B5/055 , G01R33/36
摘要： A gate driver unit is presented. The gate driver unit includes a first power exchanging coil operatively coupled to a power source. The gate driver unit includes a second power exchanging coil configured to receive power from the first power exchanging coil via a magnetic field and a field focusing element disposed between the first power exchanging coil and the second power exchanging coil and configured to focus the magnetic field onto the second power exchanging coil. The gate driver unit also includes a first circuit coupled to the second power exchanging coil. The gate driver unit includes a gate drive subunit operatively coupled to the first circuit and configured to provide an output signal to a control terminal corresponding to a controllable switch of a second circuit. A magnetic resonance imaging system and a method of contactless power transfer in a magnetic resonance imaging system are also presented.
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公开(公告)号：US09863893B2
公开(公告)日：2018-01-09
申请号：US14396580
申请日：2013-05-29
发明人： Praful Sharma , Manoj Kumar Koyithitta Meethal , Aparna Chakrapani Sheila-Vadde , Suma Memana Narayana Bhat , Vipin Velayudhan
摘要： A material constituent sensor includes one or more metamaterial assisted antennas located to probe a material that is a multiphase composition. A signal source excites at least one metamaterial assisted antenna in a desired range of radio frequency (RF) signals, a desired range of microwave signals, or a combination RF signals and microwave signals. A data processing device is programmed to estimate material constituent fractions associated with the probed material based on amplitude data, phase data, frequency shift data, or a combination of amplitude data, phase data and frequency shift data in response to transmitted energy from at least one excited metamaterial assisted antenna, reflected energy received by at least one metamaterial assisted antenna, frequency shift data, or a combination of the transmitted energy, the reflected energy and the frequency shift.
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公开(公告)号：US20170209127A1
公开(公告)日：2017-07-27
申请号：US15328540
申请日：2015-07-28
发明人： Arun Kumar Raghunathan , Sigmund Frigstad , Adnan Bohori , Srinivas Varna , Viswanathan Kanakasabai , Suma Memana Narayana Bhat
CPC分类号： A61B8/56 , A61B8/4427 , A61B8/4433 , A61B8/4472 , G01S7/52096 , H02J7/025 , H02J50/10 , H02J50/40
摘要： A wireless charging system for wirelessly charging an ultrasound imaging system is disclosed. The wireless charging system comprise one or more primary coils connected to a power source and is capable of transmitting power from the power source. The primary coil of the one or more primary coils is disposed in a charging unit of the ultrasound imaging system. One or more secondary coils are configured to receive power transmitted from the primary coil. One or more field focusing elements are positioned between the primary coil and the secondary coil. A field focusing element is capable of focusing the magnetic field from the primary coil onto the secondary coil for wirelessly transferring power to one or more of the ultrasound device and the probe of the ultrasound imaging system.
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24.发明授权公开(公告)号：US11909226B2
公开(公告)日：2024-02-20
申请号：US17612805
申请日：2020-05-20
发明人： Rupam Basak , Jayanti Ganesh , Viswanathan Kanakasabai , Suma Memana Narayana Bhat , Subbarao Tatikonda
CPC分类号： H02J50/402 , H02J7/0013 , H02J50/12 , H02J50/80 , H02J50/90
摘要： This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a wireless power transmission apparatus that supports charging of one or more wireless power receiving apparatuses. The wireless power transmission apparatus may include multiple primary coils organized in groups (referred to as zones). Each zone may have a local controller for managing operation of one primary coil in the zone at a time. A master controller may selectively couple the primary coils to the local controllers. When a first primary coil is coupled to the local controller for a zone, the other primary coils in that zone may be disabled. The master controller may manage which primary coils from neighboring zones are coupled to their respective local controllers. Thus, when the first primary coil is activated, the adjacent primary coils (near the first primary coil) can be muted or disabled to mitigate undesirable interference.
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公开(公告)号：US20240030754A1
公开(公告)日：2024-01-25
申请号：US18256539
申请日：2021-12-08
CPC分类号： H02J50/80 , H02J50/10 , H02J50/60 , H04L25/4902
摘要： This disclosure provides systems, methods and apparatuses for a new communication technique between a wireless power transmission apparatus and a wireless power reception apparatus. The new communication technique may be more efficient for communication of a feedback parameter or other control information compared to a legacy packet-based digital communication technique. The new communication technique may use a pulse width modulation (PWM) signal as an analog representation of a feedback parameter or other control information. In some implementations, the PWM communication technique in this disclosure can be used for a variety of control or feedback information from the wireless power reception apparatus to the wireless power transmission apparatus. Furthermore, in some implementations, the PWM communication technique may be used for feedforward information from the wireless power transmission apparatus to the wireless power reception apparatus.
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公开(公告)号：US20230298810A1
公开(公告)日：2023-09-21
申请号：US18321434
申请日：2023-05-22
摘要： A receiver unit of a wireless power transfer system is presented. The receiver unit includes a main receiver coil, a plurality of auxiliary receiver coils disposed about a central axis of the main receiver coil, and a receiver drive subunit. The receiver drive subunit includes a main converter operatively coupled to the main receiver coil and having a main output terminal. The receiver drive subunit may include a plurality of auxiliary converters operatively coupled to the plurality of auxiliary receiver coils. The plurality of auxiliary converters may be operatively coupled to each other to form an auxiliary output terminal coupled in series to the main output terminal to form a common output terminal. In some implementations, the receiver drive unit may be formed on a substrate of an integrated electronic component. The integrated electronic component may further include a communication subunit and a controller disposed.
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公开(公告)号：US11588349B2
公开(公告)日：2023-02-21
申请号：US16616914
申请日：2018-04-19
发明人： Viswanathan Kanakasabai , Suma Memana Narayana Bhat , Arun Kumar Raghunathan , Rahul Bhujade , Satishbabu Bhogineni , Somakumar Ramachandrapanicker
摘要： A wireless charging device includes a driver unit configured to generate one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency. Also, the wireless charging device includes a transmitting unit having a first coil and a first capacitor and configured to transmit the first AC voltage signal. Further, the transmitting unit includes a second coil and a second capacitor and configured to transmit the second AC voltage signal. Additionally, the wireless charging device includes a control unit configured to detect a first receiver device operating at the first frequency based on a change in a first voltage in the transmitting unit, and detect a second receiver device operating at the second frequency based on a change in a second voltage in the transmitting unit.
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公开(公告)号：US20210152027A1
公开(公告)日：2021-05-20
申请号：US17048429
申请日：2019-03-22
摘要： A receiver unit of a wireless power transfer system is presented. The receiver unit includes a main receiver coil, a plurality of auxiliary receiver coils disposed about a central axis of the main receiver coil, and a receiver drive subunit. The receiver drive subunit includes a main converter operatively coupled to the main receiver coil and having a main output terminal. The receiver drive subunit may include a plurality of auxiliary converters operatively coupled to the plurality of auxiliary receiver coils. The plurality of auxiliary converters may be operatively coupled to each other to form an auxiliary output terminal coupled in series to the main output terminal to form a common output terminal. In some implementations, the receiver drive unit may be formed on a substrate of an integrated electronic component. The integrated electronic component may further include a communication subunit and a controller disposed.
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公开(公告)号：US10330754B2
公开(公告)日：2019-06-25
申请号：US15396968
申请日：2017-01-03
发明人： Daniel Garcia , Tamer Fahed Khalaf , Jason Monclair Pittman , Anton Linz , William John Bonneau , Chinmoy Goswami , Vandana Rallabandi , Rahul Radhakrishna Pillai , Srinivas Satya Sai Mallampalli , Suma Memana Narayana Bhat , Viswanathan Kanakasabai
IPC分类号： G01V3/00 , G01R33/38 , H02K7/14 , H02K11/04 , H02K13/00 , A61B5/055 , H02K1/24 , H02K11/215 , G01R33/28 , G01R33/3815 , H02P25/02
摘要： A stator-less electric motor for an MRI system is provided. The stator-less electric motor includes a body, a rotor rotatable connected to the body, and at least one coil winding disposed on the rotor. The at least one coil winding is arranged so as to rotate the rotor when energized via an electrical current in the presence of a magnetic field generated by a magnet assembly of the MRI system.
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公开(公告)号：US09780575B2
公开(公告)日：2017-10-03
申请号：US14807427
申请日：2015-07-23
发明人： Arun Kumar Raghunathan , Somakumar Ramachandrapanicker , Suma Memana Narayana Bhat , Satishbabu Bhogineni
摘要： A contactless power transfer system is provided. The contactless power transfer system includes a first power exchanging coil configured to exchange power, a power mating coil operatively coupled to a switching unit, and a controller operatively coupled to the switching unit. The controller is configured to control switching operations of the switching unit to actively control a current in the power mating coil to match an impedance of the first power exchanging coil and enable the exchange of power.
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