CONTROL UNIT FOR ELECTRIC POWER STEERING DEVICE

摘要

To detect a bending load acting on a steering shaft only with a magnetostrictive torque sensor, without separately providing a sensor for detecting the bending moment. A storage unit stores, as an initial characteristic curve formed from initial detection values, a characteristic curve formed from detection values of each of a first detection coil and a second detection coil when only twisting torque is applied to a steering shaft. A bending load detector provided in an ECU 3 detects a bending load amount acting on the steering shaft based on a difference between each detection value of the first and second detection coils and the initial detection value on the initial characteristic curve corresponding to the detection value.