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:
Dec. 30, 2014
Filed:
Mar. 30, 2012
Abraham Gebregergis, Saginaw, MI (US);
Ramakrishnan Rajavenkitasubramony, Saginaw, MI (US);
Tomy Sebastian, Saginaw, MI (US);
Niharika P. Popy, Saginaw, MI (US);
Abraham Gebregergis, Saginaw, MI (US);
Ramakrishnan RajaVenkitasubramony, Saginaw, MI (US);
Tomy Sebastian, Saginaw, MI (US);
Niharika P. Popy, Saginaw, MI (US);
Steering Solutions IP Holding Corporation, Saginaw, MI (US);
Abstract
A method for controlling operation of a torque-assist motor includes determining a rotational position of the torque-assist motor and producing a motor speed signal that is indicative of a rotational speed of the motor. One or more gain factors are produced based on the rotational speed of the torque-assist motor. An electrical current applied to the torque-assist motor is detected, and a current error is calculated based on a commanded electrical current and the electrical current applied to the torque-assist motor. A quadrature axis voltage is calculated based on the current error and the one or more gain factors. An inverter is driven with a direct voltage signal that is phased with the rotational position of the torque-assist motor so as to produce the electrical current applied to the torque-assist motor. The electrical current exhibits a characteristic that is affected by the quadrature axis voltage.