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:
Jun. 11, 2019
Filed:
Aug. 18, 2017
Melexis Bulgaria Ltd, Sofia, BG;
MELEXIS BULGARIA LTD., Sofia, BG;
Abstract
A method of starting and/or driving a fan assembly, the fan assembly comprising a BLDC motor having one or more coils, and a bearing comprising a lubricant. The method comprises performing a special action for intentionally heating up the one or more coils and thereby indirectly heating up the lubricant. The method may comprise measuring a temperature of the bearing, or measuring a value related to said temperature, and performing the special action only if said temperature is below a certain threshold temperature. Performing the special action comprises setting an off-time to a first predefined value and setting an on-time to a second predefined value, the first and second predefined value having a first ratio. Starting the motor comprises setting the off-time to a third value and setting the on-time to a fourth predefined value, the third and fourth predefined value having a second ratio larger than the first ratio.