Patent ID: 8437897
Filing Date: 2013-05-07
Classification: B60K,B60W,Y02T

Abstract:
1. A method for controlling an electrical machine of a hybrid drive, the electrical machine being configured to be selectively operated both as a starter of an internal combustion engine of the hybrid drive and as a propulsion unit of the hybrid drive, the method comprising: ascertaining at least one operating parameter value of the electrical machine; detecting at least one of a control device malfunction error in the hybrid drive, a hybrid drive sensor malfunction error, and a malfunction error in the electrical machine if the at least one operating parameter value does not correspond to a reference standard state of the operating parameter; and upon detecting of an error, (i) at least partially limiting the operation of the electrical machine as the propulsion unit, and (ii) independently of the operation of the electrical machine as a propulsion unit, at least temporarily operating the electrical machine as the starter, wherein the ascertained at least one operating parameter value is at least one of: a rotational speed, a torque generated or absorbed, a winding voltage, a winding current, a phase shift between winding voltage and winding current, an excitation current, a temperature, an internal winding resistance, and a magnetic field strength, and wherein the malfunction error in the electrical machine is detected if the at least one operating parameter value does not correspond to the reference standard state of the operating parameter.