| 摘要 |
PURPOSE:To realize the constant output control device for the thyristor motor having good power factor and efficiency by setting always the beta-u value at the minimum by compensating the influence of the superposing angle (u) of the command of a set commutation allowance angle beta0 and an armature reaction angle delta. CONSTITUTION:The main circuit current Id is controlled in accordance with an Id command and the current feedback signal from the current detector 5 by a current control circuit 6 and a power source side pulse phase shifter 7. The Id command is inputted to a set commutation allowance angle beta0 command arithmetic circuit 21, which predicts the abrupt increase in the current due to abrupt change in the load or accelerating or decelerating current so as to set the beta0 for compensating the increase in the superposing angle (u) and the armature reaction angle delta. The value beta0 can be set to an optimum minimum value necessary by the signals of the field current If and the angular velocity. The terminal voltage Et tends to lower due to the increase in the Id and the corresponding voltage Vs between the brushes of a DC machine tends to lower, but the current If is intensified so that the Vs may become constant by the Vs control circuit to thereby compensate the decrease in the Et due to the increase in the current. |
