A compensated vector control scheme of a synchronous reluctance motor including saturation and iron losses

Stator-Flux-Oriented Vector Control of Synchronous Reluctance Machines With Maximized Efficiency

“…From (9) we can derive an expression for (12) The dynamics of are, therefore, given by (13) and the stator flux dynamics reduce to (14) The stator current vector in this reference frame is given by (15) Under steady-state conditions the stator voltage can be written as (16) Substitution of (16) into (15) yields an expression for steadystate stator current (17) A plot of (17), parameterized by , is shown in Fig. 2.…”

“…As the presented control scheme regulates the stator flux magnitude and torque it is similar to torque vector control [7], but the implementation presented here uses standard field-oriented control (FOC) techniques. The paper begins by presenting a machine model for the synchronous reluctance machine which incorporates winding and core losses [14], [16], [8], [2]. It is shown that the losses of the machine for a given speed and torque are solely a function of stator flux magnitude.…”

Direct Torque Control of Synchronous Reluctance Motor Using Feedback Linearization Including Saturation and Iron Losses

“…The square of the stator current I 2 s of the SynRM can be calculated as (7) where i e dl and i e ql are the currents responsible for iron losses, which can be calculated as (8) Thus, the stator current vector can be expressed as (9) using (7-8) …”

“…The input power P in of the SynRM is obtained as (10) Using (3)(4)(5)(6)(7)(8) in steady-state condition, P in can be expressed as (11) (11)…”

“…Some research efforts have been done to compensate for the saturation and iron losses in the vector controlled SynRM model. A compensated vector control scheme has been proposed in [8]. Two current observers are used to allow for the difference between the stator currents and the currents that govern the developed torque.…”