Patents by Inventor Juha KOUKKARI

Juha KOUKKARI 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).

  • Block chain for license keys of variable frequency drives
    Publication number: 20200110856
    Abstract: According to an example aspect of the present invention, there is provided servicing variable frequency drives such that servicing history transparency is facilitated. License keys of a variable frequency drive are generated based on a hardware fingerprint of the variable frequency drive, when the hardware fingerprint is changed. The license keys and transactions corresponding to hardware configurations of variable frequency drives are stored in a block chain.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 9, 2020
    Inventors: Mikko Kohvakka, Teemu Tanila, Juha Koukkari
  • Electrical system having a DC link
    Patent number: 9461475
    Abstract: An electrical system and method include a DC link, a controlled rectifier connected between the DC link and a power source, an energy storage, a DC to DC converter connected between the DC link and the energy storage, a motor, and a DC to AC converter connected between the DC link and the motor. The converters are configured to transfer power in both directions. The rectifier controls the DC voltage of the DC link when the DC link voltage is in a first voltage range. The DC to DC converter controls the DC voltage of the DC link by charging the energy storage when the DC link voltage is in a second voltage range, which has higher voltage values than the first voltage range, or by discharging the energy storage when the DC link voltage is in a third voltage range, which has lower voltages than the first voltage range.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: October 4, 2016
    Assignee: ABB Technology OY
    Inventors: Juha Koukkari, Tuomo Leppinen, Teemu Ronkainen
  • ELECTRICAL SYSTEM HAVING A DC LINK
    Publication number: 20140008977
    Abstract: An electrical system and method include a DC link, a controlled rectifier connected between the DC link and a power source, an energy storage, a DC to DC converter connected between the DC link and the energy storage, a motor, and a DC to AC converter connected between the DC link and the motor. The converters are configured to transfer power in both directions. The rectifier controls the DC voltage of the DC link when the DC link voltage is in a first voltage range. The DC to DC converter controls the DC voltage of the DC link by charging the energy storage when the DC link voltage is in a second voltage range, which has higher voltage values than the first voltage range, or by discharging the energy storage when the DC link voltage is in a third voltage range, which has lower voltages than the first voltage range.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 9, 2014
    Applicant: ABB OY
    Inventors: Juha KOUKKARI, Tuomo LEPPINEN, Teemu RONKAINEN