誘導電動機の磁気エネルギーに基づく線形モデルの導出

抄録

In this paper, a linear model for the induction motor is derived from a view point of magnetic energy. In the derived model, the induction motor is described a two-input and two-output controlled object by selecting an energy stored in the rotating field as a new state variable. Magnetic energy stored in the field and converted to the torque are considered to be controlled inputs. These magnetic energies are decoupled. This suggests that torque-producing component current is decoupled from flux-producing component current. And torque response isn't affected by rotor resistance variation. Therefore, a state of so-called field orientated control is achieved in the derived model. We confirm the availability of a derived model by comparing it with an approximated linearization model in simulation results.