| 摘要 |
An improved vector control apparatus for an induction motor is disclosed. In the vector control apparatus, a divider (13) is provided which receives an exciting instruction lambda 2d*/M* from a secondary magnetic flux instruction amplifier (11) which outputs lambda 2d*/M* according to an angular frequency omega r derived from a speed detector (43). The divider (13) receives an exciting inductance variation AMn from the exciting inductance M' compensation circuit (12, 12') to divide AMn by lambda 2d*/M* so that the derived output value is supplied to a first-order advance element calculation block (12) so that a target value i1d* in a d-axis component in a primary current of the induction motor is derived. <IMAGE> |
