| 摘要 |
PROBLEM TO BE SOLVED: To make an electric vehicle movable even when its monitor device operates abnormally, by making its computer judge the abnormality of its monitor device from the operation of its monitor device or from the own computational result, and by reporting to its driver the abnormality of its monitor device when sensing only the abnormality of its monitor device to continue its motor drive. SOLUTION: In the inside of a monitor-CPU 18, a sensed current value is transferred to a motor-torque estimating portion 42. Further, a torque command value is transferred respectively to a torque comparator 44 and a control computing portion 30, and a motor rotary speed is transferred to the control computing portion 30. From the torque command value and the motor rotary speed, the control computing portion 30 computes a torque current value and an excitation current value to communicate its computational results to a computation-CPU 16. From the sensed current value, the motor-torque estimating portion 42 estimates a motor real torque to transfer its estimating torque value to the torque comparator 44. The torque comparator 44 judge whether the computation-CPU 16 and a motor driver 12 are respectively abnormal or not. As a result, when only the monitor system is abnormal and the driving system is not abnormal, an electric vehicle can move without help to a safe place or the place of it being repairable therein. |
