独立二重三相巻線永久磁石同期モータのための4モード電流の独立・安定・高速制御

抄録

This paper proposes a new current control method for permanent-magnet synchronous motors with double independent three-phase windings (DIW-PMSMs). It is well known that stable and fast current control of DIW-PMSMs is very difficult because of the inevitable magnetic coupling between two windings. Many methods suffer from slow and/or low performance when trying to achieve stable control. The proposed method takes a new approach that first extracts two fast and two slow mode-currents in the dq synchronous reference frame, and then controls four mode-currents independently and stably. The method succeeds in stable and fast current control of the motors. It can be applied even in cases where 1) independent windings have small leakage coefficients (i.e., large coupling coefficients), and 2) motor parameters and current commands associated with each winding are widely different. The effectiveness and usefulness of the proposed method are verified though simulations under harsh conditions.