Patents by Inventor David Paul Mohr

David Paul Mohr 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).

  • Patent number: 10447074
    Abstract: Examples herein disclose a first power supply comprising a controller to detect a condition associated with a device. The First power supply includes a converter to modify behavior of the first power supply in response to the detected condition associated with the device.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: October 15, 2019
    Assignee: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
    Inventors: Samantha Jean Castillo, David Paul Mohr
  • Patent number: 9853492
    Abstract: An automatic transfer switch module includes an automatic transfer switch. The automatic transfer switch may receive a first power from a first power source and a second power from a second power source. The automatic transfer switch may selectively provide one of the first power and the second power to a power supply module.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: December 26, 2017
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Samantha Jean Castillo, David Paul Mohr, Daniel Humphrey
  • Publication number: 20170063149
    Abstract: Examples herein disclose a first power supply comprising a controller to detect a condition associated with a device. The First power supply includes a converter to modify behavior of the first power supply in. response to the detected condition associated with the device.
    Type: Application
    Filed: February 27, 2014
    Publication date: March 2, 2017
    Inventors: Samantha Jean CASTILLO, David Paul MOHR
  • Patent number: 9401635
    Abstract: A switching power supply includes power factor correction circuitry and a standby output converter. One or more loads may be coupled to one or more outputs of the switching power supply. The switching power supply is configured to disable the power factor correction circuitry under some load conditions and to enable the power factor correction circuitry under other load conditions. As a consequence, power that would have been drawn by the power factor correction circuitry is conserved when the power factor correction circuitry is disabled.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: July 26, 2016
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Daniel Humphrey, Mohamed Amin Bemat, David Paul Mohr
  • Publication number: 20160118802
    Abstract: An automatic transfer switch module includes an automatic transfer switch. The automatic transfer switch may receive a first power from a first power source and a second power from a second power source. The automatic transfer switch may selectively provide one of the first power and the second power to a power supply module.
    Type: Application
    Filed: June 18, 2013
    Publication date: April 28, 2016
    Inventors: Samantha Jean Castillo, David Paul Mohr, Daniel Humphrey
  • Patent number: 9118243
    Abstract: A power converter (14) can include a switching system (18) to convert a direct current (DC) input voltage to an output voltage based on a switching signal having a duty-cycle. A controller (16) can set the duty-cycle of the switching signal, depending on the DC input voltage, to one of a substantially constant value, such that the output voltage follows the DC input voltage in a normal mode, and a value that varies inversely with respect to the DC input voltage, such that the output voltage is substantially constant in another mode.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: August 25, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Paul Mohr, Daniel Humphrey
  • Publication number: 20150113295
    Abstract: Examples disclose a controller with a meter interface to receive a first input power measurement provided from a meter. The meter delivers input power to a rectifier which delivers power to a load. Additionally, the examples disclose the controller with a rectifier interface to receive a second input power measurement provided from the rectifier. Further, the examples disclose the controller to manage the rectifier based on the first and the second input power measurements.
    Type: Application
    Filed: July 31, 2012
    Publication date: April 23, 2015
    Inventors: David Paul Mohr, Michael G. Waters, Zachary J. Gerbozy
  • Patent number: 9013073
    Abstract: A method for balancing input current with at least two parallel power supplies, including the steps of defining an input current difference tolerance, measuring input current from the at least two parallel power supplies, calculating an absolute value of the difference between the two measured input currents, and when the calculated value exceeds the tolerance, performing the subset of steps including employing an adjustment technique to calculate new operating parameters for the two power supplies, configuring the two power supplies with the new operating parameters, and repeating the steps above except for the defining step.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: April 21, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hsin-Chih Lee, Daniel Humphrey, Zachary J. Gerbozy, David Paul Mohr
  • Patent number: 8817491
    Abstract: An electric power conversion system has an adaptable transformer turns ratio for improved efficiency. The transformer has multiple taps on its primary. Switching circuitry is configured to connect an energy source to the taps in at least two modes such that the transformer operates with a first primary-to-secondary turns ratio in the first mode and with a second primary-to-secondary turns ratio in the second mode. The first turns ratio is greater than the second turns ratio. Control circuitry is configured to operate the switching circuitry in the first mode when a voltage level of the energy source is above a first threshold and to operate the switching circuitry in the second mode when the voltage level is below a second threshold.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: August 26, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Paul Mohr, Mohamed Amin Bemat, Reynaldo P Domingo
  • Patent number: 8648491
    Abstract: Methods, devices, and systems for passive impedance matching are provided. An example of a method of passive impedance matching includes provided a substantially equivalent impedance between a source and a load for three single-phase power supplies via a geometry of a busbar. The busbar can be coupled to the three-phase power supplies as the source and coupled to a plurality of electronic machines as the load.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: February 11, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew James Phelan, Michael Stearns, Minh H. Nguyen, Chanh V. Hua, Raghavan V. Venugopal, David Paul Mohr
  • Patent number: 8564269
    Abstract: Systems and methods for scaling a current signal in a power factor correction circuit are disclosed. An exemplary method may include providing a power factor correction circuit for a power supply, the power factor correction circuit having a first current sensing resistor connected on a return path to a rectified AC line. The method may also include measuring current across the first current sensing resistor. The method may also include switching on at least a second current sensing resistor in parallel with the first current sensing resistor if the measured current increases above a threshold value.
    Type: Grant
    Filed: December 13, 2008
    Date of Patent: October 22, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: David Paul Mohr, Zachary J. Garbozy, Mohamed Amin Bemat
  • Publication number: 20130117592
    Abstract: A method for power capping is disclosed. The power supplied to a load from a power supply is compared to a power capping limit 302. When the power drawn by the load exceeds the power capping limit, power to the load is supplied by both the power supply and an energy storage device 304.
    Type: Application
    Filed: September 16, 2010
    Publication date: May 9, 2013
    Inventors: Daniel Humphrey, David Paul Mohr, Zachary J. Gerbozy
  • Publication number: 20130099756
    Abstract: Backup power supply systems and methods are disclosed. An exemplary method includes providing at least one battery module having a first register with at least one battery parameter. The method also includes coupling an intelligent interface converter (IIC) between the at least one battery module and an electrical load, the IIC having a second register with at least one battery parameter. The method also includes communicating the at least one battery parameter to a user for reporting and management operations.
    Type: Application
    Filed: October 26, 2010
    Publication date: April 25, 2013
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: David Paul Mohr, Daniel Humphrey, Zachary J. Gerbozy
  • Publication number: 20130026832
    Abstract: A method for balancing input current with at least two parallel power supplies, including the steps of defining an input current difference tolerance, measuring input current from the at least two parallel power supplies, calculating an absolute value of the difference between the two measured input currents, and when the calculated value exceeds the tolerance, performing the subset of steps including employing an adjustment technique to calculate new operating parameters for the two power supplies, configuring the two power supplies with the new operating parameters, and repeating the steps above except for the defining step.
    Type: Application
    Filed: April 22, 2010
    Publication date: January 31, 2013
    Inventors: Hsin-Chih Lee, Daniel Humphrey, Zachary J. Gerbozy, David Paul Mohr
  • Patent number: 8310100
    Abstract: A redundant power solution system, including at least a first and second input module, each configured for receiving input power, an output converter, wherein a first output line from the first input module and a second output line from the second module both feed into the output converter, and a control mechanism associated with the first and second input modules, wherein the control mechanism monitors the input power received by the first and second input modules and dynamically selects at least one of the first and second input modules to feed power into the output converter.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: November 13, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Daniel Humphrey, Mohamed Amin Bemat, David Paul Mohr, Mark Isagani Bello Rivera
  • Publication number: 20120249110
    Abstract: A power converter (14) can include a switching system (18) to convert a direct current (DC) input voltage to an output voltage based on a switching signal having a duty-cycle. A controller (16) can set the duty-cycle of the switching signal, depending on the DC input voltage, to one of a substantially constant value, such that the output voltage follows the DC input voltage in a normal mode, and a value that varies inversely with respect to the DC input voltage, such that the output voltage is substantially constant in another mode.
    Type: Application
    Filed: October 25, 2010
    Publication date: October 4, 2012
    Inventors: David Paul Mohr, Daniel Humphrey
  • Patent number: 8281172
    Abstract: One exemplary embodiment is a server that includes multiple power supplies. When the server is in a standby state, one power supply is in a standby state and another power supply is in a deep sleep state.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: October 2, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Daniel Humphrey, Mohamed Amin Bemat, Reynaldo P. Domingo, David Paul Mohr
  • Publication number: 20120074783
    Abstract: Methods, devices, and systems for passive impedance matching are provided. An example of a method of passive impedance matching includes providing a substantially equivalent impedance between a source and a load for three single-phase power supplies via a geometry of a busbar. The busbar can be coupled to the three-phase power supplies as the source and coupled to a plurality of electronic machines as the load.
    Type: Application
    Filed: September 28, 2010
    Publication date: March 29, 2012
    Inventors: Andrew James Phelan, Michael Stearns, Minh H. Nguyen, Chanh V. Hua, Raghavan V. Venugopal, David Paul Mohr
  • Publication number: 20120033469
    Abstract: An electric power conversion system has an adaptable transformer turns ratio for improved efficiency. The transformer has multiple taps on its primary. Switching circuitry is configured to connect an energy source to the taps in at least two modes such that the transformer operates with a first primary-to-secondary turns ratio in the first mode and with a second primary-to-secondary turns ratio in the second mode. The first turns ratio is greater than the second turns ratio. Control circuitry is configured to operate the switching circuitry in the first mode when a voltage level of the energy source is above a first threshold and to operate the switching circuitry in the second mode when the voltage level is below a second threshold.
    Type: Application
    Filed: April 27, 2009
    Publication date: February 9, 2012
    Inventors: David Paul Mohr, Mohamed Amin Bemat, Reynaldo P. Domingo
  • Publication number: 20120026763
    Abstract: A switching power supply includes power factor correction circuitry and a standby output converter. One or more loads may be coupled to one or more outputs of the switching power supply. The switching power supply is configured to disable the power factor correction circuitry under some load conditions and to enable the power factor correction circuitry under other load conditions. As a consequence, power that would have been drawn by the power factor correction circuitry is conserved when the power factor correction circuitry is disabled.
    Type: Application
    Filed: April 27, 2009
    Publication date: February 2, 2012
    Inventors: Daniel Humphrey, Mohamed Amin Bemat, David Paul Mohr