Self-tuning approach to optimization of excitation angles for switched-reluctance motor drives

Adaptive flux weakening control of switched reluctance machines in rotating reference frame

“…The concept of phase advancing/flux weakening is used to counter the effect of speed on the back-emf voltage. The rate of change of current per phase can be described as (6) where is the phase current, is the phase voltage, is describing the rate of change of inductance, and is the non-linear inductance profile of the machine. Here the back-emf voltage of the machine can be represented by ( 7 ) As the speed increases, the back-emf of the machine also increases, which results in the current not rising fast enough to desired values in Region I of Fig.…”

“…Self-tuning based methods have also been proposed in [6][7][8]. In [6] a method was proposed which takes the basic turn-on and turn-off angles proposed in [2] and manipulate them to reduce the copper losses thereby increasing the system efficiency.…”

“…The nonlinear nature of SRMs requires specialized optimization for the control parameters [2]. The efforts can be classified as analytical methods [2,3], self-tuning methods [4,5,6,7], artificial intelligence methods [7,8] and lookup table based methods [5].…”

“…In [6] a method was proposed which takes the basic turn-on and turn-off angles proposed in [2] and manipulate them to reduce the copper losses thereby increasing the system efficiency. A neural network is used in [7] that takes the speed and the current as input and produce the corresponding turn-on and turn-off angle.…”

Control Optimization of a Slotted Switched Reluctance Generator for High-torque Applications

“…In [23], the authors maximized the torque output, while in [24], the output power and efficiency were optimized. It should be noticed that the simplified model is often used with the analytical approach.…”