Sensorless position tracking for steer-by-wire applications

Space modulation profile modelling for steer‐by‐wire SMPMSM

“… where The sideband in the resulting αβ HF currents due to saliency is on the negative side of the frequency spectrum around ‐ ω i ; hence, it can be easily demodulated. The performance of a PLL observer with a heterodyning demodulation input stage for a rotating voltage vector injection is discussed in [1, 10].…”

“…Considering this and that, the size of the air gap is of considerable size when compared to the stator slot opening, could possibly result in a dominant rotor geometry‐based saliency. Since the geometric saliency is dependent on the air gap, a low‐cost machine such as the one used in this research with a high air‐gap tolerance could contribute to the imperfect saliencies observed in [10]. The traditional inverse tangent or PLL‐based observers cannot produce accurate estimates when operating directly on such non‐sinusoidal inputs.…”

“…The sensorless control of a salient PM machine using a rotating high‐frequency vector was simulated in [1] and implemented experimentally on a 400 W 12 V surface‐mounted PM synchronous machine (SMPMSM) in [10]. The simulation environment assumes an ideal salient machine with constant but different values of synchronous inductances L d and L q .…”

“…This error is not suitable for vector‐based current control of the machine, which aims to keep the stator and the rotor flux separate by 90° electrical. This paper models a sensorless observer in MATLAB which operates on the three‐phase current data obtained from the experimental setup shown in [10]. The proposed observer uses selective real‐time filtering in order to improve the quality of the saliencies measured in order to reduce the error in the position estimate.…”

Modelado y control multivariable del vehículo urbano eléctrico UAL-eCARM

“…Otro aspecto de la configuración reside en los sensores que realicen la realimentación del sistema. Los sensores no tienen por qué estar acoplados físicamente al mecanismo estudiado (Scicluna et al, 2017). Empleando el ejemplo de la dirección, elángulo de Ackermann se puede determinar mediante la lectura de un codificador acoplado al actuador electrónico, a partir de la odometría del vehículo con codificadores en las ruedas traseras o mediante el empleo de un GPS y una IMU (Drage et al, 2014).…”