| 摘要 |
PURPOSE:To suppress fluctuation of torque and to improve constancy of response speed by operating the amplification factor of a current detection system and parameters relevant to offset values based on time characteristics of d-axis component and q-axis component and then correcting the output of an amplifier, in real time, according to thus operated parameters. CONSTITUTION:Load current values of phase (u) and (v) are sampled through A/D converters 15a, 15b and subjected to (dq) conversion through a DSP(digital signal processor) 14. d-axis and q-axis components of the load current value are employed in calibration and correction parameters relevant to amplifiers 18a, 18b are operated in a CPU 11, followed by determination of detected load current values of respective phases. Current value of load current of each phase is then corrected and subjected to (dq) conversion thus producing d-axis component and q-axis component from which DC component error and vibrating component are removed. |
