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:
Feb. 21, 2006
Filed:
Mar. 18, 2004
Nigel Strike, Phoenix, AZ (US);
Carl Brewer, Chandler, AZ (US);
Nigel Strike, Phoenix, AZ (US);
Carl Brewer, Chandler, AZ (US);
Minebea Co., Ltd., Tokyo, JP;
Abstract
A microcontroller emulates advancement of a speed sensor for a motor, rather than having a physical movement of the speed sensor. The microcontroller calculates an advancement time based on the motor's efficiency. The microcontroller measures a motor speed utilizing a tachometer signal transmitted from the speed sensor. The microcontroller subtracts the emulated advancement time from the motor speed to generate a commutation countdown time. The microcontroller switches or commutates outputs when the commutation countdown time has elapsed. The microcontroller measures an actual advance time, which is a time between the commutating of the outputs and a receipt of the next speed sensor interrupt. The microcontroller calculates an anticipated motor speed by adding the actual advance time to the commutation countdown time.