The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2025
Filed:
Feb. 16, 2022
Dyson Technology Limited, Wiltshire, GB;
Máté Horvát, Swindon, GB;
Dyson Technology Limited, Wiltshire, GB;
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.