Patents by Inventor Efore Oyj

Efore Oyj 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).

  • Publication number: 20130140890
    Abstract: An overload protection circuit for supplying electric power has advantageous applications especially in supplying power to capacitive loads. In prior art circuits, the charging current is lead to the capacitive load through a linearly operating transistor or through a power resistor. Therefore, prior art circuits often involve a risk of exceeding safe operating area of a power transistor, or circuits with a large number of components are needed. The present overload protection circuit has an inductor (L) coupled in series with a switching element (Q). Load current is measured (35, 38), and the switching element (Q) is controlled (35, 36) to supply current to the load via the inductor (L) until a determined current limit is achieved. After achieving the current limit the switching element (Q) is controlled to off-state, during which the freewheeling current of the inductor (L) is lead through a voltage dependent element (Z).
    Type: Application
    Filed: December 3, 2012
    Publication date: June 6, 2013
    Applicant: EFORE OYJ
    Inventor: Efore Oyj