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In more electric vehicles, to reduce cost, volume and weight, a Hall effect position sensor may be used instead of a resolver as the mechanical sensor to allow vector control of a Permanent Magnet Synchronous Machine (PMSM) with a sinusoidal back-EMF. As this kind of sensor provides only six measurements per electrical turn, the position error between the actual rotor position and the measured position...
In this paper, a rotor position estimation based on a low-resolution position sensor is proposed. As vector control of an ac permanent-magnet synchronous machine requires the rotor position with sufficiently high resolution, the low-resolution sensor signal is transformed into a spatially quantized rotating vector and based on this vector, a vector-tracking observer calculates the corresponding high-resolution...
Bio-mimetic robotic systems, among many other engineered systems, require motors which possess high torque, little or no torque ripple, compact size, and precise position control. It is frequently challenging to include a motor with a design which fits all of these requirements. Several companies have recently released compact pancake brushless DC motors which possess excellent characteristics. However,...
This paper presents an algorithm for parameters and positions estimation of lumped flexible systems. As soon as the parameters and the positions are estimated they can be used to design virtual sensors that can be moved along the system to estimate the position of any lumped mass keeping the system free from any attached sensors. The virtual sensors are nothing but a chain of estimators that are connected...
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