Patent ID: 8924082
Filing Date: 2014-12-30
Classification: B60L,B62D,H02P,Y02T

Abstract:
1. A system for controlling operation of a torque-assist motor of an electrical power-assist system of a motor vehicle, the system comprising: a motor position sensor configured and arranged for determining a rotational position of the torque-assist motor; a motor speed calculation module configured to produce a motor speed signal that is indicative of a rotational speed of the torque-assist motor and that is based on a change in the rotational position of the torque-assist motor over a period of time; a gain calculation module that is configured to: a current sensor configured to detect a drawn electrical current that is being drawn by the torque-assist motor; an error calculation module configured to calculate a current error based on a commanded electrical current and the drawn electrical current being drawn by the torque-assist motor; a controller module configured to calculate a quadrature axis voltage based on the current error and the one or more gain factors; and an inverter driven by a direct voltage signal that is phased with the rotational position of the torque-assist motor, the inverter configured to produce an electrical current to be applied to the torque-assist motor, a characteristic of the electrical current to be applied to the torque-assist motor being affected by the quadrature axis voltage.