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公开(公告)号：US11153961B2
公开(公告)日：2021-10-19
申请号：US17085694
申请日：2020-10-30
发明人： Terrence E. Rogers
IPC分类号： H05H1/46
摘要： A system for plasma ignition and maintenance of an atmospheric pressure plasma. The system has a variable frequency alternating current (AC) power source, a transformer, a cable connected to a secondary winding of the transformer, a programmed microprocessor for control of power to the atmospheric pressure plasma. The microprocessor is configured to a) at pre-ignition, power the AC power source at an operational frequency fop higher than the resonant frequency fr, b) decrease the operational frequency fop of the AC power source until there is plasma ignition, and c) after the plasma ignition, further decrease the operational frequency fop of the AC power source to a frequency lower than the resonant frequency fr.
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公开(公告)号：US20240349417A1
公开(公告)日：2024-10-17
申请号：US18645324
申请日：2024-04-24
发明人： Terrence E. Rogers
CPC分类号： H05H1/36 , H01F27/385 , H01F38/10 , H03M1/1245 , H05H2240/10
摘要： A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.
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公开(公告)号：US11706866B2
公开(公告)日：2023-07-18
申请号：US17318852
申请日：2021-05-12
CPC分类号： H05H1/30 , H01F27/24 , H01F27/2876 , H01F27/325 , H01F38/10 , H05B41/16 , H05H2242/26
摘要： A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.
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公开(公告)号：US20230354500A1
公开(公告)日：2023-11-02
申请号：US18217574
申请日：2023-07-02
CPC分类号： H05H1/30 , H01F27/24 , H01F27/2876 , H01F27/325 , H01F38/10 , H05B41/16 , H05H2242/26
摘要： A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.
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公开(公告)号：US20210274629A1
公开(公告)日：2021-09-02
申请号：US17318852
申请日：2021-05-12
摘要： A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.
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公开(公告)号：US11019713B2
公开(公告)日：2021-05-25
申请号：US17085604
申请日：2020-10-30
摘要： A ballast transformer and system using the ballast transformer to couple power to a plasma load. The ballast transformer has a magnetic core, a first primary winding on a primary side of the magnetic core, a secondary winding on a secondary side of the magnetic core, and a second primary winding connected in series with the first primary winding and wound in proximity to the secondary winding on the secondary side of the magnetic core. The first primary winding is connectable to the AC power source, and the secondary winding is connectable to the plasma load via a coaxial cable.
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公开(公告)号：US11974385B2
公开(公告)日：2024-04-30
申请号：US18132906
申请日：2023-04-10
发明人： Terrence E. Rogers
CPC分类号： H05H1/36 , H01F27/385 , H01F38/10 , H03M1/1245 , H05H2240/10
摘要： A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.
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公开(公告)号：US11641709B2
公开(公告)日：2023-05-02
申请号：US17318300
申请日：2021-05-12
发明人： Terrence E. Rogers
摘要： A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.
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公开(公告)号：US20230363078A1
公开(公告)日：2023-11-09
申请号：US18132906
申请日：2023-04-10
发明人： Terrence E. Rogers
CPC分类号： H05H1/36 , H01F38/10 , H03M1/1245 , H01F27/385 , H05H2240/10
摘要： A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.
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公开(公告)号：US20210274630A1
公开(公告)日：2021-09-02
申请号：US17318300
申请日：2021-05-12
发明人： Terrence E. Rogers
摘要： A system for determining an operational state of an atmospheric pressure plasma. The system has a transformer for coupling power into the atmospheric pressure plasma, a current sampling circuit configured to sample at least one current pulse flowing through a primary winding of the transformer, and a programmed microprocessor configured to determine, from a waveform of the current pulse, the operational state of the atmospheric pressure plasma. The operational state is one of: a no plasma state, a plasma origination state indicative of an ignited arc expanding into a plasma by gas flow thereinto, and a plasma maintenance state indicative of the plasma being expanded.
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