Patents Assigned to PHILIPS IP VENTURES B.V.
  • Patent number: 10069350
    Abstract: An inductive power transfer system comprises a primary unit operable to generate an electromagnetic field and at least one secondary device, separable from the primary unit, and adapted to couple with the field when the secondary device is in proximity to the primary unit so that power can be received inductively by the secondary device from the primary unit without direct electrical conductive contacts therebetween. The system detects if there is a substantial difference between, on the one hand, a power drawn from the primary unit and, on the other hand, a power required by the secondary device or, if there is more than one secondary device, a combined power required by the secondary devices. Following such detection, the system restricts or stops the inductive power supply from the primary unit. Such a system can detect the presence of unwanted parasitic loads in the vicinity of the primary unit reliably.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: September 4, 2018
    Inventors: Michael Craig Stevens, Alexander Charles Knill, John Robert Dunton, Julian Andrew John Fells
  • Patent number: 10014722
    Abstract: A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal to the oscillator that is representative of the current in the resonant tank circuit. The current feedback signal drives the frequency of the ballast circuit causing the ballast circuit to seek resonance. The ballast circuit preferably includes a current limit circuit that is inductively coupled to the resonant tank circuit. The current limit circuit disables the ballast circuit when the current in the ballast circuit exceeds a predetermined threshold or falls outside a predetermined range.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: July 3, 2018
    Assignee: Philips IP Ventures B.V.
    Inventors: Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Ronald C. Markham, Dennis J. Denen
  • Patent number: 10007297
    Abstract: Wireless power receiving apparatus 150 is retrofitted to a portable electrical device 100 to enable the device to receive power wirelessly. The apparatus comprises a power-receiving element 200 adapted to be attached to the device, e.g. by adhesive 201, and also being adapted to receive power wirelessly from a transmitter of power when the element and transmitter are in proximity with one another. One or more power connectors 203 are connected electrically to the power-receiving element and are adapted to be connected, when the apparatus is in use, to one or more corresponding power connectors 101 of the portable electrical device to deliver power received by the element to the device. The power-receiving element may be in the form of a sticker or may be carried by or incorporated in a replacement cover portion for the portable electrical device.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: June 26, 2018
    Inventors: Pilgrim G. W. Beart, David P. Whitewood, Lily Ka-Lai Cheng, James W. Hay