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:
Jul. 09, 2024
Filed:
Jun. 27, 2019
Valeo Systemes D'essuyage, La Verriere, FR;
Jose-Luis Herrada, La Verriere, FR;
Valeo Systemes d'Essuyage, La Verriere, FR;
Abstract
A brushless DC motor () comprises a rotor comprising magnetic elements twining poles of the electric motor () and a control magnet comprising a number of pole pairs equal to three times that of the electric motor (), a stator having electromagnetic excitation coils, at least one first and one second Hall-effect sensor (') configured to detect predetermined angular positions of the rotor, and a control unit configured to apply a predetermined sequence of excitation signals to the coils, wherein the Hall-effect sensors are spaced apart by an angle greater than or equal to 10°, the first Hall-effect sensor () is used to determine the switching times of the excitation signals and the second Hall-effect sensor (′) is used, in combination with the first Hall-effect sensor (), to determine the direction of rotation of the rotor when the motor starts up, or vice versa.