Patents by Inventor Michaël Bernardus Petrus Esvelt

Michaël Bernardus Petrus Esvelt 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: 9906175
    Abstract: Method of starting a three-phase sinusoidal BLDC motor, comprising: a) determining an initial position of the rotor; b) applying a first set of sinusoidal energizing signals to the windings, corresponding to a set of sinusoidal waveforms shifted apart by 120° and 240° sampled at a first angle (?1); and maintaining the energizing signals for allowing the rotor to move to a first angular position; c) while maintaining the energizing signals, monitoring two of the phase currents, and determining whether a predefined condition is satisfied, comprising testing whether a ratio of two total current values is equal to a predefined value, and if true, to repeat steps b) and c), but with second and further sinusoidal energizing signals sampled at a second or further angular position, selected from a limited group of discrete angular positions.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: February 27, 2018
    Assignee: MELEXIS TECHNOLOGIES NV
    Inventors: Michaël Bernardus Petrus Esvelt, Robert Filusch