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:
Aug. 21, 2012
Filed:
Dec. 15, 2009
Davide Betta, Barzanò, IT;
Diego Armaroli, Mortara, IT;
Roberto Trabattoni, Oggiona S. Stefano, IT;
Marco Ferrari, Voghera, IT;
Davide Betta, Barzanò, IT;
Diego Armaroli, Mortara, IT;
Roberto Trabattoni, Oggiona S. Stefano, IT;
Marco Ferrari, Voghera, IT;
STMicroelectronics S.R.L., Agrate Brianza (MI), IT;
Abstract
A method for determining gain of a back-electromotive force amplifier may include setting an electric motor into a tri-state function mode and storing a first quasi steady-state value for back-electromotive force from the difference signal, and forcing a reference current through the electric motor and determining a first value of the gain of the amplifier for equaling a difference signal to the first quasi steady-state value. The method may further include setting the electric motor into a tri-state function mode a second time and storing a second quasi steady-state value for back-electromotive force from the difference signal, and increasing the first value of the gain by an amount proportional to a difference between the second quasi steady-state value and the first quasi steady-state value.