| 摘要 |
PURPOSE:To obtain a controller for a commutatorless motor which can follow up a torque command in the delay degree of a detector and an arithmetic unit by compensating the transient torque insufficiency due to current delay at a control leading angle. CONSTITUTION:A current value is delayed for a stepwise torque command (b-1), but a differentiator 1 calculates and outputs a differentiated current value DELTAi shown by a broken line b-2 by a detected current value (i) from a current transformer 7, and this differentiated current value DELTAi is converted into the phase corrected value DELTAbeta correspnoding to the torque correction. A comparator 5''' butts a set control leading angle value beta0 and a corrected phase component DELTAbeta, and the control leading angle of the inverter 1b is controlled by the difference beta=beta0-DELTAbeta. Accordingly, the output torque of the synchronus motor 2 is compensated for the insufficient component due to the current delay by the phase compensation, and becomes a response b-4 with less time delay to the set torque. |
