Patents by Inventor Deepakraj Malhar Divan
Deepakraj Malhar Divan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9299524Abstract: Novel circuits for providing ride-through during unpredictable power line disturbances are disclosed in connection with low-power electronic devices. Such low-power electronics devices are typically subjected to undesirable lock-ups and reboots under momentary power line disturbances such as voltage sags, voltage swells, and other momentary line power disturbances. Diagnostics and visual indication are also integrated in the circuits to allow consumers to correlate equipment lock-up and malfunction with power disturbances, and to provide service providers with various analytics and historical data on the recorded disturbances. To reduce cost, the disclosed circuits utilize a simple DC capacitor without any additional power conditioning switches or converters. In one exemplary embodiment, the disclosed circuits are embedded inside a power line cord to provide a ride-through during the brief interval of time such power line disturbances occur.Type: GrantFiled: December 30, 2011Date of Patent: March 29, 2016Assignee: INNOVOLT, INC.Inventor: Deepakraj Malhar Divan
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Patent number: 9270170Abstract: A sag corrector apparatus for providing voltages temporarily (ride-through) to a load during momentary electrical disturbances in the power supply line. In one embodiment, the disclosed apparatus compensates for voltage sags by using a variable duty cycle boost converter to boost the sagged line voltage to resemble desired voltage levels during occurrence of voltage sags. The boosted voltage available to a connected load during a sag depends on a sequence of operation of various control pulses. Duty cycle of the boost converter is controlled by changing the width (duration) of the control pulses. To prevent voltage shoot-throughs from over-boosting, an energy clamp circuit is provided to dissipate excess energy. Embodiments of the sag corrector circuit can be additionally integrated with power protection functions.Type: GrantFiled: April 18, 2012Date of Patent: February 23, 2016Assignee: INNOVOLT, INC.Inventor: Deepakraj Malhar Divan
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Patent number: 8643989Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: GrantFiled: September 12, 2011Date of Patent: February 4, 2014Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8587913Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: GrantFiled: September 12, 2011Date of Patent: November 19, 2013Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8582262Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: GrantFiled: September 12, 2011Date of Patent: November 12, 2013Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8488285Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: GrantFiled: September 12, 2011Date of Patent: July 16, 2013Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8411403Abstract: Disclosed are various embodiments of voltage protectors that include a first voltage clamping device configured to clamp a voltage of an input power applied to an electrical load, and a second voltage clamping device configured to clamp the voltage applied to the electrical load. A series inductance separates the first and second voltage clamping devices. Also, a switching element is employed to selectively establish a direct coupling of the input power to the electrical load, where a circuit is employed to control the operation of the switching element.Type: GrantFiled: April 29, 2011Date of Patent: April 2, 2013Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8335068Abstract: Disclosed are various embodiments of voltage protectors that include a first voltage clamping device configured to clamp a voltage of an input power applied to an electrical load, and a second voltage clamping device configured to clamp the voltage applied to the electrical load. A series inductance separates the first and second voltage clamping devices. Also, a switching element is employed to selectively establish a direct coupling of the input power to the electrical load, where a circuit is employed to control the operation of the switching element.Type: GrantFiled: April 29, 2011Date of Patent: December 18, 2012Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8325455Abstract: Disclosed are various embodiments of voltage protectors that include a first voltage clamping device configured to clamp a voltage of an input power applied to an electrical load, and a second voltage clamping device configured to clamp the voltage applied to the electrical load. A series inductance separates the first and second voltage clamping devices. Also, a switching element is employed to selectively establish a direct coupling of the input power to the electrical load, where a circuit is employed to control the operation of the switching element.Type: GrantFiled: April 29, 2011Date of Patent: December 4, 2012Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Publication number: 20120262140Abstract: A sag corrector apparatus for providing voltages temporarily (ride-through) to a load during momentary electrical disturbances in the power supply line. In one embodiment, the disclosed apparatus compensates for voltage sags by using a variable duty cycle boost converter to boost the sagged line voltage to resemble desired voltage levels during occurrence of voltage sags. The boosted voltage available to a connected load during a sag depends on a sequence of operation of various control pulses. Duty cycle of the boost converter is controlled by changing the width (duration) of the control pulses. To prevent voltage shoot-throughs from over-boosting, an energy clamp circuit is provided to dissipate excess energy. Embodiments of the sag corrector circuit can be additionally integrated with power protection functions.Type: ApplicationFiled: April 18, 2012Publication date: October 18, 2012Applicant: Innovolt, Inc.Inventor: Deepakraj Malhar Divan
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Publication number: 20120169141Abstract: Novel circuits for providing ride-through during unpredictable power line disturbances are disclosed in connection with low-power electronic devices. Such low-power electronics devices are typically subjected to undesirable lock-ups and reboots under momentary power line disturbances such as voltage sags, voltage swells, and other momentary line power disturbances. Diagnostics and visual indication are also integrated in the circuits to allow consumers to correlate equipment lock-up and malfunction with power disturbances, and to provide service providers with various analytics and historical data on the recorded disturbances. To reduce cost, the disclosed circuits utilize a simple DC capacitor without any additional power conditioning switches or converters. In one exemplary embodiment, the disclosed circuits are embedded inside a power line cord to provide a ride-through during the brief interval of time such power line disturbances occur.Type: ApplicationFiled: December 30, 2011Publication date: July 5, 2012Applicant: INNOVOLT, INC.Inventor: Deepakraj Malhar Divan
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Publication number: 20120063047Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicant: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Publication number: 20120063043Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicant: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Publication number: 20120063048Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicant: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Publication number: 20120063042Abstract: Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal.Type: ApplicationFiled: September 12, 2011Publication date: March 15, 2012Applicant: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 8035938Abstract: Active current surge limiters (100) and methods of use are disclosed. One exemplary system, among others, comprises a current limiter (140), including an interface configured to be connected between a power supply (110) and a load (120); a disturbance sensor (150), configured to monitor the power supply for a disturbance during operation of the load; and an activator (160), configured to receive a control signal (215) from the disturbance sensor (150) and to activate the current limiter (140) based on the control signal.Type: GrantFiled: October 24, 2005Date of Patent: October 11, 2011Assignee: Georgia Tech Research CorporationInventor: Deepakraj Malhar Divan
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Patent number: 7835128Abstract: Systems and methods for implementing line overload control via providing distributed series impedance are disclosed. One system, amongst others, comprises at least one distributed series reactor (DSR). Each DSR comprises a single turn transformer (SST) comprising two split-core sections (132), a winding (120), and an air-gap (138), the air-gap designed such that a magnetizing inductance is produced when the two split-core sections (132) are clamped around a conductor (108). Each DSR further comprises a contact switch (122) that short circuits the winding when the contact switch (122) is in a closed condition, a power supply (128) that derives power from conductor line current, and a controller (130) configured to open the contact switch when the conductor line current reaches a predetermined value, thus causing insertion of the magnetizing inductance into the conductor.Type: GrantFiled: January 30, 2006Date of Patent: November 16, 2010Assignee: Georgia Tech Research CorporationInventors: Deepakraj Malhar Divan, Harjeet Johal
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Publication number: 20090296298Abstract: Active current surge limiters (100) and methods of use are disclosed. One exemplary system, among others, comprises a current limiter (140), including an interface configured to be connected between a power supply (110) and a load (120); a disturbance sensor (150), configured to monitor the power supply for a disturbance during operation of the load; and an activator (160), configured to receive a control signal (215) from the disturbance sensor (150) and to activate the current limiter (140) based on the control signal.Type: ApplicationFiled: October 24, 2005Publication date: December 3, 2009Inventor: Deepakraj Malhar Divan
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Publication number: 20080310069Abstract: Systems and methods for implementing line overload control via providing distributed series impedance are disclosed. One system, amongst others, comprises at least one distributed series reactor (DSR). Each DSR comprises a single turn transformer (SST) comprising two split-core sections (132), a winding (120), and an air-gap (138), the air-gap designed such that a magnetizing inductance is produced when the two split-core sections (132) are clamped around a conductor (108). Each DSR further comprises a contact switch (122) that short circuits the winding when the contact switch (122) is in a closed condition, a power supply (128) that derives power from conductor line current, and a controller (130) configured to open the contact switch when the conductor line current reaches a predetermined value, thus causing insertion of the magnetizing inductance into the conductor.Type: ApplicationFiled: January 30, 2006Publication date: December 18, 2008Inventors: Deepakraj Malhar Divan, Harjeet Johal