Patent ID: 6154351
Filing Date: 2000-11-28
Classification: F02D,Y02T

Abstract:
An apparatus for detecting an abnormality in a d.c. motor driving system including a d.c. motor and a driven apparatus, in which a switching element connected to the d.c. motor in series is provided in a power supply path extending from a driving power source to the d.c. motor, rotation of the d.c. motor is controlled in accordance with a switching control of the switching element, and the driven apparatus is driven by the d.c. motor, the apparatus comprising:switching control means for switching the switching element;drive corresponding amount detecting means for detecting a drive corresponding amount of the driven apparatus by the d.c. motor;a resistor connected in parallel with the d.c. motor;voltage detecting means for detecting each of voltages at both ends of the resistor; andabnormality determining means for determining an abnormality in the d.c. motor or the driven apparatus and an abnormality in the switching element or the power supply path while distinguishing the abnormalities from each other on the basis of the drive corresponding amount detected by the drive corresponding amount detecting means, and a voltage value detected by the voltage detecting means when the switching element is switching-controlled by the switching control means.