Sensored and sensorless speed control methods for brushless doubly fed reluctance motors

Abstract

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A New Sensorless Speed Control Scheme for Doubly Fed Reluctance Generators

“…Similar studies to those conducted for the BDFIG [24]- [26] or DFIG [6] have also been done on the BDFRG(M) involving: scalar control [2], [23], vector control (VC) [1], [2], [5], [23], [27]- [29], direct torque and secondary flux (λ s ) [23], [30] or primary reactive power (Q) control (DTC) [31], direct power control (DPC) [32] and variable structure control [33]. The preliminary attributes in [2], [23], [33] are intellectually interesting but have been left unproven in practice.…”

“…Other, less common wound rotor BDFIG types [16]- [19] or BDFRG designs [20] are also feasible. By the absence of the rotor windings, the BDFRG should offer the higher efficiency [21] with simpler dynamic modeling [22] and inherently decoupled field-oriented control (FOC) of primary real and reactive power [1], [2], [23], in contrast to the BDFIG [15], [24]- [26]. The emphasis of this paper therefore contemplates on the BDFRG as a prominent forthcoming technology.…”

“…The preliminary attributes in [2], [23], [33] are intellectually interesting but have been left unproven in practice. On the other hand, an original model-based DTC approach put forward in [30] has been experimentally substantiated with, and in [23] without, a shaft position sensor for speed regulation.…”

“…The preliminary attributes in [2], [23], [33] are intellectually interesting but have been left unproven in practice. On the other hand, an original model-based DTC approach put forward in [30] has been experimentally substantiated with, and in [23] without, a shaft position sensor for speed regulation. However, the DTC methodologies in [23], [30] are extremely sensitive to inductance knowledge and λ s estimation inaccuracies so that poor proof of concept results for an unloaded BDFRM have just been reported.…”

Electric Machine Topologies in Energy Storage Systems

“…The power electronics require lower power ratings than single feed machines and also allow variable speed operation while the power winding is directly coupled to the grid frequency (Valenciaga & Puleston, 2007). The main drawback of this technology is the low torque per volume, lower than an equivalent synchronous reluctance (Syncrel) or a cage induction machine (IM) (Jovanovic, 2009). …”