Patents by Inventor Edwin SHIRES

Edwin SHIRES 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).

  • 3-wire transformer-free UPS system and method of control to reduce common mode current
    Patent number: 10340733
    Abstract: A common mode choke in a 3-wire transformer free UPS system with which different rectifier and bypass power sources are used is eliminated by using different types of PWM control depending on whether the inverter is paralleled with the bypass power source. When the inverter is paralleled with the bypass power source, a type of PWM control is used that does not have common mode voltage injection. When the inverter is not paralleled with the bypass power source, a type of PWM control is used that has common mode voltage injection. In an aspect, the PWM control that does not have common mode voltage injection is sine-triangle PWM and the PWM control that has common mode voltage injection is space-vector PWM.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: July 2, 2019
    Assignee: Vertiv Corporation
    Inventors: Edwin Shires, Terry D. Bush, Brian P. Heber, Charles F. Blair
  • Method of controlling an uninterruptible power supply to clear a shorted load
    Patent number: 9825489
    Abstract: An uninterruptible power supply system has a three-level T-Type inverter A method that improves clearing a short of a load coupled to an output of the inverter when the load experiences a short circuit event includes commutating with a controller each phase of the inverter in a two level mode current generation when output voltage and output current of that phase have the same direction and commutating each phase of the inverter in a three level mode current generation when the output voltage and output current of that phase have opposite directions.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: November 21, 2017
    Assignee: Vertiv S.R.L.
    Inventors: Ugo Cinti, Guerino Vassallo, Matteo Lo Torto, Gianni Dipietrangelo, Marco Bonora, Edwin Shires
  • 3-WIRE TRANSFORMER-FREE UPS SYSTEM AND METHOD OF CONTROL TO REDUCE COMMON MODE CURRENT
    Publication number: 20150244206
    Abstract: A common mode choke in a 3-wire transformer free UPS system with which different rectifier and bypass power sources are used is eliminated by using different types of PWM control depending on whether the inverter is paralleled with the bypass power source. When the inverter is paralleled with the bypass power source, a type of PWM control is used that does not have common mode voltage injection. When the inverter is not paralleled with the bypass power source, a type of PWM control is used that has common mode voltage injection. In an aspect, the PWM control that does not have common mode voltage injection is sine-triangle PWM and the PWM control that has common mode voltage injection is space-vector PWM.
    Type: Application
    Filed: February 6, 2015
    Publication date: August 27, 2015
    Applicant: LIEBERT CORPORATION
    Inventors: Edwin SHIRES, Terry D. BUSH, Brian P. HEBER, Charles F. BLAIR