Patents by Inventor Máté HORVÁT

Máté HORVÁT 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: 20240154549
    Abstract: A brushless permanent magnet motor has a phase winding, an inverter for applying voltage vectors to the phase winding, and a controller for controlling the inverter. The inverter has a plurality of high side switches and a plurality of low side switches. The controller is configured to divide an electrical cycle of the motor into a first portion and a second portion different to the first portion, apply a first set of voltage vectors to the phase winding in the first portion of the electrical cycle, and apply a second set of voltage vectors to the phase winding in the second portion of the electrical cycle. The second set of voltage vectors is different to the first set of voltage vectors. The controller is configured to turn on a low side switch to apply each voltage vector of the first set of voltage vectors, and turn off all low side switches to apply a zero-voltage vector of the second set of voltage vectors.
    Type: Application
    Filed: February 16, 2022
    Publication date: May 9, 2024
    Applicant: Dyson Technology Limited
    Inventor: Máté HORVÁT
  • Publication number: 20240128903
    Abstract: A method is described for controlling a three-phase permanent-magnet motor. The method includes sequentially exciting and freewheeling phases of the motor. The phases are freewheeled when a magnitude of phase current rises to an upper threshold, and freewheeling continues for either a fixed period of time or until the magnitude of the phase current decreases to a lower threshold. The method further includes measuring a parameter that corresponds to either the magnitude of the phase current during or at the end of freewheeling, or an interval between a start and end of freewheeling or a start and end of excitation. A saturation event is determined to have occurred when the measured parameter is less than a saturation threshold. In response to the saturation event, the phases are commutated.
    Type: Application
    Filed: February 16, 2022
    Publication date: April 18, 2024
    Applicant: Dyson Technology Limited
    Inventor: Máté HORVÁT
  • Publication number: 20240072700
    Abstract: A method of controlling a brushless permanent magnet motor having a plurality of phase windings and an inverter for applying voltage vectors to the plurality of the phase windings, the method including monitoring phase current flowing through a first phase winding to determine a zero-crossing point of the phase current flowing through the first phase winding. The method includes predicting a polarity of phase current flowing through a second phase winding based on the determined zero-crossing point of the phase current flowing through the first phase winding, and determining a timing of a control signal to control switches of the inverter to apply a voltage vector to the phase windings. The timing of the control signal is determined using the predicted polarity of phase current flowing through the second phase winding.
    Type: Application
    Filed: February 16, 2022
    Publication date: February 29, 2024
    Applicant: Dyson Technology Limited
    Inventor: Máté HORVÁT
  • Publication number: 20230421085
    Abstract: A drive circuit for a brushless motor is described. The drive circuit includes a converter for connection to a phase winding of the motor, and a controller. The converter includes a plurality of switches and the controller controls the states of the switches to configure the converter in one of a plurality of configurations. In a first configuration, current is permitted to flow through the phase winding in a first direction and in a second opposite direction. In a second configuration, current is permitted to flow through the phase winding in the first direction and is prevented from flowing through the phase winding in the second direction. The controller includes an input for receiving a signal indicative of current in the converter, and the controller configures the converter from the first configuration to the second configuration in response to a characteristic of the current.
    Type: Application
    Filed: November 15, 2021
    Publication date: December 28, 2023
    Applicant: Dyson Technology Limited
    Inventors: Stephen GREETHAM, Maté HORVÁT
  • Publication number: 20230327587
    Abstract: A method of determining a position of a rotor of a brushless permanent magnet motor includes measuring a current value indicative of current flowing through a phase winding of the motor and providing a reference voltage value indicative of a voltage applied to the phase winding of the motor. The method includes calculating a phase of back EMF induced in the phase winding using the measured current value and the reference voltage value, and determining a zero-crossing point of the back EMF induced in the phase winding using the calculated phase of back EMF induced in the phase winding. The method includes generating a rotor position signal based on the determined zero-crossing point.
    Type: Application
    Filed: September 22, 2021
    Publication date: October 12, 2023
    Applicant: Dyson Technology Limited
    Inventors: Máté HORVÁT, Xiaoxu ZHANG
  • Patent number: 11368058
    Abstract: A stator assembly including at least one pair of c-shaped stator cores, each c-shaped stator core having a bobbin, and a winding wound around each bobbin, wherein the windings on each adjacent pair of c-shaped stator cores are wound in opposite directions.
    Type: Grant
    Filed: June 19, 2018
    Date of Patent: June 21, 2022
    Assignee: Dyson Technology Limited
    Inventors: Laurent Le Mentec, Yu Chen, Tuncay Celik, Mate Horvat
  • Publication number: 20180366997
    Abstract: A stator assembly comprising at least one pair of c-shaped stator cores, each c-shaped stator core having a bobbin, and a winding wound around each bobbin, wherein the windings on each adjacent pair of c-shaped stator cores are wound in opposite directions.
    Type: Application
    Filed: June 19, 2018
    Publication date: December 20, 2018
    Applicant: Dyson Technology Limited
    Inventors: Laurent LE MENTEC, Yu CHEN, Tuncay CELIK, Mate HORVAT