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公开(公告)号：US20190341840A1
公开(公告)日：2019-11-07
申请号：US15971958
申请日：2018-05-04
申请人： Raytheon Company
摘要： A reconfigurable power converter is provided that includes a pulse-width modulation (PWM) controller. The PWM controller is configured to switch between a first modulation scheme and a second modulation scheme when a current-level property crosses a transition threshold.
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公开(公告)号：US10361698B2
公开(公告)日：2019-07-23
申请号：US15413166
申请日：2017-01-23
申请人： Raytheon Company
IPC分类号： H03K17/687 , H03F3/217 , H03K17/06 , H03K17/691 , H02M3/07 , H03K17/567 , H01L29/16
摘要： A gate drive circuit for generating asymmetric drive voltages comprises a gate drive transformer comprising: a primary winding responsive to a pulse width module (PWM) input signal to generate a bipolar signal having a positive bias voltage and a negative bias voltage; and a secondary winding responsive to the bipolar signal to generate a PWM output signal. A first charge pump is connected to the secondary winding responsive to the PWM output signal to generate a level shifted PWM output signal. A second charge pump is connected to the secondary winding to generate a readjusted PWM output signal by decreasing at least a portion of the level shifted PWM output signal. A gate switching device is connected to the first charge pump and second charge pump. A level shifted PWM output signal establishes an ON condition and the readjusted PWM output signal establishes an OFF condition of the gate MOSFET.
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公开(公告)号：US10778218B2
公开(公告)日：2020-09-15
申请号：US16520241
申请日：2019-07-23
申请人： Raytheon Company
IPC分类号： H03K17/687 , H03F3/217 , H03K17/06 , H03K17/691 , H02M3/07 , H03K17/567 , H01L29/16
摘要： A gate drive circuit for generating asymmetric drive voltages comprises a gate drive transformer comprising: a primary winding responsive to a pulse width module (PWM) input signal to generate a bipolar signal having a positive bias voltage and a negative bias voltage; and a secondary winding responsive to the bipolar signal to generate a PWM output signal. A first charge pump is connected to the secondary winding responsive to the PWM output signal to generate a level shifted PWM output signal. A second charge pump is connected to the secondary winding to generate a readjusted PWM output signal by decreasing at least a portion of the level shifted PWM output signal. A gate switching device is connected to the first charge pump and second charge pump. A level shifted PWM output signal establishes an ON condition and the readjusted PWM output signal establishes an OFF condition of the gate MOSFET.
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公开(公告)号：US11979084B2
公开(公告)日：2024-05-07
申请号：US17893495
申请日：2022-08-23
申请人： Raytheon Company
发明人： Sriram Chandrasekaran , Bruce Stoltz , Marty Perry , Noel Delgado
CPC分类号： H02M1/325 , H02M1/0009 , H02M1/0087 , H02M1/34 , H02M3/28 , H02M3/33573 , H02M3/33592
摘要： An isolated DC/DC converter includes a primary stage, a transformer circuit, a secondary stage, an active clamp, a first current sense node, and a second current sense node. The primary stage includes a primary switching inverter configured to invert the source DC voltage into a high-frequency alternating current (AC) voltage. The transformer circuit adjusts an AC voltage level of the high-frequency AC voltage and outputs an adjusted AC voltage. The secondary stage includes a secondary switching converter to convert the adjusted AC voltage into a secondary voltage, and the active clamp is configured to clamp the secondary voltage to provide an output DC voltage. The first current sense node is included in the primary stage conducts a source current having a first current level, and the second current sense node is included in the secondary stage and conducts a clamp current having a second current level.
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公开(公告)号：US20240072641A1
公开(公告)日：2024-02-29
申请号：US17893495
申请日：2022-08-23
申请人： Raytheon Company
发明人： Sriram Chandrasekaran , Bruce Stoltz , Marty Perry , Noel Delgado
CPC分类号： H02M1/325 , H02M1/0009 , H02M1/0087 , H02M3/28
摘要： An isolated DC/DC converter includes a primary stage, a transformer circuit, a secondary stage, an active clamp, a first current sense node, and a second current sense node. The primary stage includes a primary switching inverter configured to invert the source DC voltage into a high-frequency alternating current (AC) voltage. The transformer circuit adjusts an AC voltage level of the high-frequency AC voltage and outputs an adjusted AC voltage. The secondary stage includes a secondary switching converter to convert the adjusted AC voltage into a secondary voltage, and the active clamp is configured to clamp the secondary voltage to provide an output DC voltage. The first current sense node is included in the primary stage conducts a source current having a first current level, and the second current sense node is included in the secondary stage and conducts a clamp current having a second current level.
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公开(公告)号：US10784859B2
公开(公告)日：2020-09-22
申请号：US16520253
申请日：2019-07-23
申请人： Raytheon Company
IPC分类号： H03K17/687 , H03F3/217 , H03K17/06 , H03K17/691 , H02M3/07 , H03K17/567 , H01L29/16
摘要： A gate drive circuit for generating asymmetric drive voltages comprises a gate drive transformer comprising: a primary winding responsive to a pulse width module (PWM) input signal to generate a bipolar signal having a positive bias voltage and a negative bias voltage; and a secondary winding responsive to the bipolar signal to generate a PWM output signal. A first charge pump is connected to the secondary winding responsive to the PWM output signal to generate a level shifted PWM output signal. A second charge pump is connected to the secondary winding to generate a readjusted PWM output signal by decreasing at least a portion of the level shifted PWM output signal. A gate switching device is connected to the first charge pump and second charge pump. A level shifted PWM output signal establishes an ON condition and the readjusted PWM output signal establishes an OFF condition of the gate MOSFET.
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公开(公告)号：US10574129B2
公开(公告)日：2020-02-25
申请号：US15971958
申请日：2018-05-04
申请人： Raytheon Company
摘要： A reconfigurable power converter is provided that includes a pulse-width modulation (PWM) controller. The PWM controller is configured to switch between a first modulation scheme and a second modulation scheme when a current-level property crosses a transition threshold.
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公开(公告)号：US20200106435A1
公开(公告)日：2020-04-02
申请号：US16520241
申请日：2019-07-23
申请人： Raytheon Company
IPC分类号： H03K17/687 , H03F3/217 , H03K17/06 , H03K17/691 , H02M3/07 , H03K17/567
摘要： A gate drive circuit for generating asymmetric drive voltages comprises a gate drive transformer comprising: a primary winding responsive to a pulse width module (PWM) input signal to generate a bipolar signal having a positive bias voltage and a negative bias voltage; and a secondary winding responsive to the bipolar signal to generate a PWM output signal. A first charge pump is connected to the secondary winding responsive to the PWM output signal to generate a level shifted PWM output signal. A second charge pump is connected to the secondary winding to generate a readjusted PWM output signal by decreasing at least a portion of the level shifted PWM output signal. A gate switching device is connected to the first charge pump and second charge pump. A level shifted PWM output signal establishes an ON condition and the readjusted PWM output signal establishes an OFF condition of the gate MOSFET.
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公开(公告)号：US20240355528A1
公开(公告)日：2024-10-24
申请号：US18136079
申请日：2023-04-18
申请人： Raytheon Company
CPC分类号： H01F27/28 , H01F27/24 , H01F41/0206 , H01F41/06
摘要： An example integrated transformer is provided having a core. A first set of windings encircles a first region around the core. A second set of windings encircles a second region around the core, wherein the first region and the second region are not the same. At least one insert separates magnetic flux induced by the first set of windings and the second set of windings enabling increased magnetic inductance with reduced winding losses.
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公开(公告)号：US20200106436A1
公开(公告)日：2020-04-02
申请号：US16520253
申请日：2019-07-23
申请人： Raytheon Company
IPC分类号： H03K17/687 , H03F3/217 , H03K17/06 , H03K17/691 , H02M3/07 , H03K17/567
摘要： A gate drive circuit for generating asymmetric drive voltages comprises a gate drive transformer comprising: a primary winding responsive to a pulse width module (PWM) input signal to generate a bipolar signal having a positive bias voltage and a negative bias voltage; and a secondary winding responsive to the bipolar signal to generate a PWM output signal. A first charge pump is connected to the secondary winding responsive to the PWM output signal to generate a level shifted PWM output signal. A second charge pump is connected to the secondary winding to generate a readjusted PWM output signal by decreasing at least a portion of the level shifted PWM output signal. A gate switching device is connected to the first charge pump and second charge pump. A level shifted PWM output signal establishes an ON condition and the readjusted PWM output signal establishes an OFF condition of the gate MOSFET.
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