Patents Assigned to Power Control Technologies, Inc.
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Publication number: 20200227999Abstract: A methods and systems for generating rectified signals are disclosed. For example, a system performing the methods includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: ApplicationFiled: March 23, 2020Publication date: July 16, 2020Applicant: DRS Power & Control Technologies, Inc.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Patent number: 10630162Abstract: A system includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: GrantFiled: July 6, 2018Date of Patent: April 21, 2020Assignee: DRS Power & Control Technologies, Inc.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Patent number: 10491149Abstract: Embodiments of the present invention are directed to a controller that is configured to limit the rate of change of speed of a motor (e.g., the acceleration or deceleration) regardless of the operating mode of the motor (e.g., speed, torque, or power control mode). The controller can include an acceleration estimator which monitors the output speed of a motor and provides an acceleration-limited speed set point. The output of the acceleration estimator may be limited to a range of acceptable acceleration values that correspond to the required limits of acceleration and deceleration. The acceleration estimator can be configured such that it causes the speed regulator to override the torque and/or power regulators when the acceleration range is exceeded.Type: GrantFiled: December 11, 2018Date of Patent: November 26, 2019Assignee: DRS Power & Control Technologies, Inc.Inventor: David J. Gritter
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Patent number: 10256626Abstract: An electrical network configured to suppress voltage transients includes a capacitor and an electrical impedance in parallel with a diode. The capacitor is in series with the parallel connected diode and electrical impedance. The electrical network is configured to suppress voltage transients occurring across the series combination of the capacitor and the parallel connected diode and electrical impedance.Type: GrantFiled: July 28, 2016Date of Patent: April 9, 2019Assignee: DRS Power & Control Technologies, Inc.Inventors: Christopher Harper, Jeffery Fischer, Ian Wallace
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Patent number: 10199973Abstract: Embodiments of the present invention are directed to a controller that is configured to limit the rate of change of speed of a motor (e.g., the acceleration or deceleration) regardless of the operating mode of the motor (e.g., speed, torque, or power control mode). The controller can include an acceleration estimator which monitors the output speed of a motor and provides an acceleration-limited speed set point. The output of the acceleration estimator may be limited to a range of acceptable acceleration values that correspond to the required limits of acceleration and deceleration. The acceleration estimator can be configured such that it causes the speed regulator to override the torque and/or power regulators when the acceleration range is exceeded.Type: GrantFiled: August 26, 2014Date of Patent: February 5, 2019Assignee: DRS Power & Control Technologies, Inc.Inventor: David J. Gritter
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Publication number: 20180316257Abstract: A system includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: ApplicationFiled: July 6, 2018Publication date: November 1, 2018Applicant: DRS Power & Control Technologies, Inc.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Patent number: 10056820Abstract: A system includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: GrantFiled: November 5, 2015Date of Patent: August 21, 2018Assignee: DRS POWER & CONTROL TECHNOLOGIES, INC.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Publication number: 20160336743Abstract: An electrical network configured to suppress voltage transients includes a capacitor and an electrical impedance in parallel with a diode. The capacitor is in series with the parallel connected diode and electrical impedance. The electrical network is configured to suppress voltage transients occurring across the series combination of the capacitor and the parallel connected diode and electrical impedance.Type: ApplicationFiled: July 28, 2016Publication date: November 17, 2016Applicant: DRS Power & Control Technologies, Inc.Inventors: Christopher Harper, Jeffery Fischer, Ian Wallace
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Patent number: 9431819Abstract: An electrical network configured to suppress voltage transients is disclosed. The network includes a capacitor and an electrical impedance in parallel with a diode. The capacitor is in series with the parallel connected diode and electrical impedance, and the electrical network is configured to suppress voltage transients occurring across the series combination of the capacitor and the parallel connected diode and electrical impedance.Type: GrantFiled: January 31, 2014Date of Patent: August 30, 2016Assignee: DRS Power & Control Technologies, Inc.Inventors: Christopher Harper, Jeffery Fischer, Ian Wallace
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Patent number: 9345917Abstract: An injection port is provided for installation on an enclosure to provide quick access for admitting a fire suppressing agent into the enclosure in the event of a fire inside the enclosure. The injection port includes a housing and an injection port cover. The housing includes a mounting plate for mounting the housing to the enclosure and a pin receptacle. The injection port cover includes a cover plate and a pin release mechanism. The pin release mechanism includes a movable pin that engages with the pin receptacle of the housing to secure the injection port cover to the housing when the injection port is in the closed position.Type: GrantFiled: July 2, 2013Date of Patent: May 24, 2016Assignee: DRS Power & Control Technologies, Inc.Inventors: Donald R. Clinger, Jr., Andrew J. Nerbun
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Publication number: 20160126824Abstract: A system includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: ApplicationFiled: November 5, 2015Publication date: May 5, 2016Applicant: DRS Power & Control Technologies, Inc.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Patent number: 9240732Abstract: A system includes a current source rectifier which has a plurality of switches configured to receive an input current from an AC voltage source and to receive a plurality of control signals. The switches are configured to produce a rectified output current based on the input current and the control signals. The system also includes a rectifier controller configured to receive a current sense signal indicative of the rectified output current and to generate the control signals based at least in part on the current sense signal, where the control signals cause the current source rectifier to attenuate at least one of a plurality of harmonic frequencies in the rectified output current.Type: GrantFiled: May 22, 2013Date of Patent: January 19, 2016Assignee: DRS Power & Control Technologies, Inc.Inventors: Robert M. Cuzner, Ashish R. Bendre, William R. Kranz
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Publication number: 20150222114Abstract: An electrical network configured to suppress voltage transients is disclosed. The network includes a capacitor and an electrical impedance in parallel with a diode. The capacitor is in series with the parallel connected diode and electrical impedance, and the electrical network is configured to suppress voltage transients occurring across the series combination of the capacitor and the parallel connected diode and electrical impedance.Type: ApplicationFiled: January 31, 2014Publication date: August 6, 2015Applicant: DRS Power & Control Technologies, Inc.Inventors: Christopher Harper, Jeffery Fischer, Ian Wallace
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Patent number: 9075593Abstract: An integrated power system suitable for simultaneously powering marine propulsion and service loads. The system includes: (a) at least one generator configured with at least first and second armature windings configured to output respective first and second alternating current power signals of different voltages, the at least two armature windings positioned within the same stator slots so that they magnetically couple; (b) at least first and second rectifier circuits coupled to said generator to convert said first and second alternating current power signals into first and second direct current power signals; (c) a first load to which said first direct current power signal is coupled and a second load to which said second direct current power signal is coupled.Type: GrantFiled: June 30, 2014Date of Patent: July 7, 2015Assignee: DRS Power & Control Technologies, Inc.Inventors: Gene Castles, Edgar S. Thaxton
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Patent number: 8928292Abstract: An integrated power system suitable for simultaneously powering marine propulsion and service loads. The system includes: (a) at least one generator configured with at least first and second armature windings configured to output respective first and second alternating current power signals of different voltages, the at least two armature windings positioned within the same stator slots so that they magnetically couple; (b) at least first and second rectifier circuits coupled to said generator to convert said first and second alternating current power signals into first and second direct current power signals; and (c) a first load to which said first direct current power signal is coupled and a second load to which said second direct current power signal is coupled.Type: GrantFiled: August 24, 2009Date of Patent: January 6, 2015Assignee: DRS Power & Control Technologies, Inc.Inventors: Gene Castles, Edgar S. Thaxton
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Patent number: 8873261Abstract: Systems and methods disclosed herein include a controller for a current source rectifier that is configured to facilitate operation in both continuous and discontinuous conduction modes. The controller comprises a discontinuous mode detection unit configured to determine when input current of the current source rectifier becomes discontinuous and a duty cycle calculation unit adapted to calculate duty cycles for the current source rectifier differently for operation in continuous or discontinuous mode. The controller is adapted to transition to a mode of operation to provide an input current that approximates a sinusoidal current during both the continuous and discontinuous modes of operation. The controller outputs control signals to turn on one or more of the electrical switches in the current source rectifier based on the calculated duty cycles.Type: GrantFiled: May 29, 2013Date of Patent: October 28, 2014Assignee: DRS Power & Control Technologies, Inc.Inventor: Robert M. Cuzner
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Patent number: 8737098Abstract: A high voltage inverter is provided which includes a plurality of k-level flying capacitor H bridge modules, k being greater than 2, each having a positive dc terminal, a negative dc terminal, and two ac terminals, a connecting unit for connecting said ac terminals of said plurality of k-level flying capacitor H bridge modules in series to form a cascading set of modules, and a dc source connected to an ac source and having a transformer, a rectifier rectifying an output voltage of said transformer, and a capacitor connected between the positive and negative dc terminals.Type: GrantFiled: February 17, 2012Date of Patent: May 27, 2014Assignee: DRS Power & Control Technologies, Inc.Inventors: Ashish R. Bendre, Slobadan Krstic
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Patent number: 8693227Abstract: An inverter controller comprising a current regulator unit, a voltage regulator unit coupled to the current regulator unit, an inverter unit coupled to the voltage regulator unit, and a drive unit controlled by the inverter unit.Type: GrantFiled: September 19, 2011Date of Patent: April 8, 2014Assignee: DRS Power & Control Technologies, Inc.Inventors: David J. Gritter, James Ulrich
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Publication number: 20130070505Abstract: An inverter controller comprising a current regulator unit, a voltage regulator unit coupled to the current regulator unit, an inverter unit coupled to the voltage regulator unit, and a drive unit controlled by the inverter unit.Type: ApplicationFiled: September 19, 2011Publication date: March 21, 2013Applicant: DRS POWER & CONTROL TECHNOLOGIES, INC.Inventors: David J. Gritter, James Ulrich
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Publication number: 20130051094Abstract: A high voltage inverter is provided which includes a plurality of k-level flying capacitor H bridge modules, k being greater than 2, each having a positive dc terminal, a negative dc terminal, and two ac terminals, a connecting unit for connecting said ac terminals of said plurality of k-level flying capacitor H bridge modules in series to form a cascading set of modules, and a dc source connected to an ac source and having a transformer, a rectifier rectifying an output voltage of said transformer, and a capacitor connected between the positive and negative dc terminals.Type: ApplicationFiled: February 17, 2012Publication date: February 28, 2013Applicant: DRS Power & Control Technologies, Inc.Inventors: Ashish R. Bendre, Slobodan Krstic