| 摘要 |
PURPOSE:To compensate the phase delay of an armature current command value generated when processed by a microprocessor by calculating and outputting armature current command values of phases at an angle added with a rotary position detected by the delay phase angle. CONSTITUTION:The rotating position theta of a synchronous motor 1 output from a counter 7 is applied to a differentiator 10 and an adder 12. The differentiator 10 differentiates the rotary position theta, i.e., the operating frequency (f) and outputs it. The frequency (f) is multiplied by a multiplifer 11 by constant 2pi.TL. In other words, the delay phase angle thetaL is output from the multiplier 11. This delay phase angle thetaL is added by an adder 12 by the rotary position theta. This added angles theta+thetaL is used to output unit sinusoidal wave of 120 deg. phase difference from ROMs 8U, 8V, 8W, multiplied by the amplitude command I* by D/A converters 9U, 9V, 9W to produce current command values iu*, iv*, iw*. |
