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公开(公告)号：US10804807B2
公开(公告)日：2020-10-13
申请号：US16296103
申请日：2019-03-07
Applicant: Utah State University
Inventor： Tarak Saha , Hongjie Wang , Regan A Zane
Abstract: An apparatus for zero voltage switching includes a ZVS assist circuit connected between a switching node and a negative connection of a converter. The switching node is located between first and second switches of a switching leg of the converter. The converter is fed by a constant current source and feeds a constant current load. The ZVS assist circuit includes a ZVS inductance, a first ZVS switch that allows current through the ZVS inductance to change a voltage of the switching node to a condition for zero voltage switching of the first switch of the switching leg, and a second ZVS switch that allows current through the ZVS inductance to change the voltage of the switching node to a condition for zero voltage switching of the second switch of the switching leg. Current through the first ZVS switch is opposite current through the second ZVS switch.
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公开(公告)号：US10938313B2
公开(公告)日：2021-03-02
申请号：US16417221
申请日：2019-05-20
Applicant: Utah State University
Inventor： Tarak Saha , Hongjie Wang , Anindya Chitta Bagchi , Regan A. Zane
Abstract: An apparatus includes an active bridge section with input terminals that receive power from a constant current source where the active bridge section operates at a fixed switching frequency. The apparatus includes a resonant section with a resonant inductor, a transformer and a resonant capacitor. The inductor is connected in series with a primary winding and the capacitor is connected in parallel with a secondary winding of the transformer. The resonant section is connected to an output of the active bridge section. The apparatus includes an output rectifier section that receives power from the resonant section and includes output terminals for connection to a load, and includes a controller that regulates output voltage to the load where the controller regulates output voltage to the load by controlling switching of the active bridge section. The fixed switching frequency of the active bridge section matches a resonant frequency of the resonant section.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20200373847A1
公开(公告)日：2020-11-26
申请号：US16417221
申请日：2019-05-20
Applicant: Utah State University
Inventor： Tarak Saha , Hongjie Wang , Anindya Chitta Bagchi , Regan A. Zane
Abstract: An apparatus includes an active bridge section with input terminals that receive power from a constant current source where the active bridge section operates at a fixed switching frequency. The apparatus includes a resonant section with a resonant inductor, a transformer and a resonant capacitor. The inductor is connected in series with a primary winding and the capacitor is connected in parallel with a secondary winding of the transformer. The resonant section is connected to an output of the active bridge section. The apparatus includes an output rectifier section that receives power from the resonant section and includes output terminals for connection to a load, and includes a controller that regulates output voltage to the load where the controller regulates output voltage to the load by controlling switching of the active bridge section. The fixed switching frequency of the active bridge section matches a resonant frequency of the resonant section.
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公开(公告)号：US20190296650A1
公开(公告)日：2019-09-26
申请号：US16363643
申请日：2019-03-25
Applicant: Utah State University
Inventor： Hongjie Wang , Regan A. Zane , Tarak Saha
Abstract: A power supply includes an active bridge section with input terminals that receive power from a constant current source where the active bridge section operates at a fixed switching frequency. The power supply includes a resonant section with a resonant inductor and a resonant capacitor. The resonant section is connected to an output of the active bridge section. The power supply includes an output rectifier that receives power from the resonant section and includes output terminals for connection to a load and a controller that regulates output current to the load where the controller regulates output current to the load by controlling switching of the active bridge section. The fixed switching frequency of the active bridge section matches a resonant frequency of the resonant section.
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公开(公告)号：US10770978B2
公开(公告)日：2020-09-08
申请号：US16363643
申请日：2019-03-25
Applicant: Utah State University
Inventor： Hongjie Wang , Regan A Zane , Tarak Saha
Abstract: A power supply includes an active bridge section with input terminals that receive power from a constant current source where the active bridge section operates at a fixed switching frequency. The power supply includes a resonant section with a resonant inductor and a resonant capacitor. The resonant section is connected to an output of the active bridge section. The power supply includes an output rectifier that receives power from the resonant section and includes output terminals for connection to a load and a controller that regulates output current to the load where the controller regulates output current to the load by controlling switching of the active bridge section. The fixed switching frequency of the active bridge section matches a resonant frequency of the resonant section.
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公开(公告)号：US11018529B2
公开(公告)日：2021-05-25
申请号：US16452281
申请日：2019-06-25
Applicant: Utah State University
Inventor： Anindya Chitta Bagchi , Tarak Saha , Abhilash Kamineni , Regan A. Zane
Abstract: An apparatus for inductive power transfer (“IPT”) includes an active bridge section with input terminals that receive power from a constant current source, where the active bridge section operates at a fixed switching frequency, a primary resonant capacitor connected in series with an output terminal of the active bridge section, and a primary IPT coil connected in series with the primary resonant capacitor, where power is transferred wirelessly between the primary IPT coil and a secondary IPT coil, and the secondary IPT coil is connected in series with a secondary resonant capacitor, which is connected in series with an output rectifier section that receives power from the secondary IPT coil and comprising output terminals for connection to a load. The apparatus includes a controller that regulates output voltage to the load, where the controller regulates output voltage to the load by controlling switching of the active bridge section.
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公开(公告)号：US20200287470A1
公开(公告)日：2020-09-10
申请号：US16296103
申请日：2019-03-07
Applicant: Utah State University
Inventor： Tarak Saha , Hongjie Wang , Regan A. Zane
Abstract: An apparatus for zero voltage switching includes a ZVS assist circuit connected between a switching node and a negative connection of a converter. The switching node is located between first and second switches of a switching leg of the converter. The converter is fed by a constant current source and feeds a constant current load. The ZVS assist circuit includes a ZVS inductance, a first ZVS switch that allows current through the ZVS inductance to change a voltage of the switching node to a condition for zero voltage switching of the first switch of the switching leg, and a second ZVS switch that allows current through the ZVS inductance to change the voltage of the switching node to a condition for zero voltage switching of the second switch of the switching leg. Current through the first ZVS switch is opposite current through the second ZVS switch.
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