Patents by Inventor Matti Kivioja

Matti Kivioja 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: 10877098
    Abstract: A method for detecting a fault in an AC/AC exciter having an exciter rotor and an exciter stator. A signal reflecting the current or voltage, is obtained at an exciter rotor winding or at an exciter stator winding. A frequency analysis is applied and on the basis of a presence of a frequency component, a rotor current or voltage signal, at a first frequency fs*(2?s), where fs is a supply frequency of the exciter stator and s is an exciter slip, it is determined whether the exciter suffers from an inter-turn short circuit in an exciter stator winding or not. On the basis of a presence of a frequency component, in the case of a stator current signal or a stator voltage signal, at a second frequency fs*(1?2*s), it is determined whether the exciter suffers from an inter-turn short circuit in an exciter rotor winding or not. Presence of frequency components at the first and/or second frequencies in windings of an AC/AC exciter indicate the mentioned fault conditions.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: December 29, 2020
    Assignee: ABB Schweiz AG
    Inventors: Pedro Rodriguez, Matti Kivioja, Janne Holla, Tapio Rauhala, Ilari Karkkainen
  • Publication number: 20200367448
    Abstract: A method and a system for growing plants on multilayer principle in mobile gutter farming is described, whereby, in the process of growing plants planted in cultivation gutters, said plants are conveyed in cultivation layers present on top of each other in a cultivation space in a longitudinal direction of the cultivation space in one or opposite directions. The cultivation gutters and the plants contained therein, are treated in the cultivation space by means of a processing arrangement in a cultivation layer-specific manner, whereby the cultivation gutters and the plants contained therein are first of all conveyed by motion elements in each cultivation layer of the cultivation space in the longitudinal direction of the cultivation space in opposite directions and are treated by processing elements in each cultivation layer of the cultivation space separately, in a manner substantially independent of the other cultivation layers.
    Type: Application
    Filed: July 3, 2018
    Publication date: November 26, 2020
    Applicant: NETLED OY
    Inventor: Niko-Matti KIVIOJA
  • Publication number: 20200057110
    Abstract: A method for detecting a fault in an AC/AC exciter having an exciter rotor and an exciter stator. A signal reflecting the current or voltage, is obtained at an exciter rotor winding or at an exciter stator winding. A frequency analysis is applied and on the basis of a presence of a frequency component, a rotor current or voltage signal, at a first frequency fs*(2?s), where fs is a supply frequency of the exciter stator and s is an exciter slip, it is determined whether the exciter suffers from an inter-turn short circuit in an exciter stator winding or not. On the basis of a presence of a frequency component, in the case of a stator current signal or a stator voltage signal, at a second frequency fs*(1?2*s), it is determined whether the exciter suffers from an inter-turn short circuit in an exciter rotor winding or not. Presence of frequency components at the first and/or second frequencies in windings of an AC/AC exciter indicate the mentioned fault conditions.
    Type: Application
    Filed: September 22, 2017
    Publication date: February 20, 2020
    Inventors: Pedro RODRIGUEZ, Matti KIVIOJA, Janne HOLLA, Tapio RAUHALA, Ilari KARKKAINEN
  • Publication number: 20190246572
    Abstract: An apparatus for controlling conditions in a plant cultivation facility is provided, said apparatus comprising at least: a lighting system arranged in connection with plants present in an environmentally sealable and closable cultivation facility; a hydronic cooling arrangement for lowering or impeding the rise of temperature in the cultivation facility, said cooling arrangement comprising a cooling manifold present in connection with plants in the cultivation facility and a heat recovery arrangement for utilizing excess heat generated in the cultivation facility, said heat recovery arrangement including a heat storing system.
    Type: Application
    Filed: June 8, 2017
    Publication date: August 15, 2019
    Applicant: NETLED OY
    Inventor: Niko-Matti KIVIOJA
  • Publication number: 20180249644
    Abstract: A lighting system for growing of plants, comprising a lighting arrangement arranged in connection with the plants, which includes several electric lamps, and a cooling arrangement at least for cooling down light producing components of the lamps due to heat being generated by the same while producing light. The lighting system is arranged to be utilized in connection with a cooling arrangement, being separate with respect to the lamps of the lighting arrangement, and comprising a cooling structure, being mounted in connection with the plants. A lamp comprises a mechanical fastening frame, being coupled in a built-in manner in connection with its one or more electric components in order to attach the lamp externally against an outer surface of the cooling structure, for cooling down the lamp conductively through the cooling structure.
    Type: Application
    Filed: June 13, 2016
    Publication date: September 6, 2018
    Applicant: NETLED OY
    Inventor: Niko-Matti KIVIOJA
  • Patent number: 5612277
    Abstract: A catalyst is made of at least two metal foil strips, the transverse corrugations having been formed in at least one of them. The metal foil strips are formed into a honeycomb containing channels. The strips are coated with a support or with supports, and at least one catalytically active agent such as a noble metal is added to the coated strips in order to produce a catalytic surface. In this case the catalytic surface has the physical structure derived from the coating. The honeycomb has at least two catalytic surfaces differing from each other with respect to at least the support or the physical structure.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: March 18, 1997
    Assignee: Kemira OY
    Inventors: Matti H ark onen, Thomas Slotte, Matti Kivioja
  • Patent number: 5580533
    Abstract: The invention relates to a catalyst intended for purifying diesel exhaust gases, the catalyst comprising a honeycomb and a support which has been prepared by using titanium dioxide and an inorganic sol, and at least one catalytically active agent.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: December 3, 1996
    Assignee: Kemira OY
    Inventors: Matti Kivioja, Sointu Ravola, Thomas Slotte, Teuvo Maunula, Matti H ark onen, Pirkko Virta