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:
Sep. 13, 2011
Filed:
Sep. 17, 2008
Scott Frankel, Gilbert, AZ (US);
Christopher Best, Phoenix, AZ (US);
Scott Frankel, Gilbert, AZ (US);
Christopher Best, Phoenix, AZ (US);
Minebea Co., Ltd., Nagano, JP;
Abstract
An electronic system for controlling a fan motor includes a microcontroller and a drive circuit. The microcontroller draws power from a first voltage source and generates control signals for sending drive current to stator coils of a fan motor via the drive circuit. The electronic system further includes a second voltage source to provide the microcontroller with an amount of energy sufficient to operate for a short period of time when the voltage of the first voltage source drops below a predetermined level. The microcontroller is configured to detect when the voltage level of the first voltage source drops below a given level and generates control signals for the drive circuit to discharge energy in the stator coils of the fan motor to quickly stop operation of the fan motor within a short period of time.