Page 1. Synthesis and Digital Implementation of a Reduced Order Rotor Flux Observer for IM Drive ... IV. DIGITAL IMPLEMENTATION OF THE OBSERVER ... T z[k + I]= eMTz[k]+ ON i, [k]+ kjeMTv, [k] (30) 0 being T The M matrix turns out to have... more
Page 1. Synthesis and Digital Implementation of a Reduced Order Rotor Flux Observer for IM Drive ... IV. DIGITAL IMPLEMENTATION OF THE OBSERVER ... T z[k + I]= eMTz[k]+ ON i, [k]+ kjeMTv, [k] (30) 0 being T The M matrix turns out to have the following structure M=[a ba -7 ...
Publication Date: 1999
Publication Name: ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)
ABSTRACT Field oriented control of induction motor drives needs the detection of rotor flux which is usually detected by means of an observer. Rotor time constant variation due to rotor heating de-tunes the observer and, hence, the field... more
ABSTRACT Field oriented control of induction motor drives needs the detection of rotor flux which is usually detected by means of an observer. Rotor time constant variation due to rotor heating de-tunes the observer and, hence, the field oriented control. In the paper an adaptive observer is synthesised, which allows online rotor time constant tuning. The identification of the rotor time constant is performed by a model reference approach. The synthesis of the adaptive observer is conducted using Lyapunov stability theory applied to the drive-observer system. The simulation results evidence the good performance of the proposed observer and, hence, of the overall controlled drive. In particular, the interactive effects between the observer and the parameter identifier gains is evidenced
Publication Date: 1998
Publication Name: AMC'98 - Coimbra. 1998 5th International Workshop on Advanced Motion Control. Proceedings (Cat. No.98TH8354)
... It can be observed that, due to three phase operation in the case of proposed algorithm, the shape of the currents ... The algorithm allows to exploit all the motor phases under every operating condition, obtaining minimization of... more
... It can be observed that, due to three phase operation in the case of proposed algorithm, the shape of the currents ... The algorithm allows to exploit all the motor phases under every operating condition, obtaining minimization of Joule losses and torque ripple free behaviour. ...
In this paper, a predictive direct torque control (DTC) of induction motor (IM) drive is presented. The control uses stator flux and current vectors as state variables. Predicted torque variation, with reference to its unforced response... more
In this paper, a predictive direct torque control (DTC) of induction motor (IM) drive is presented. The control uses stator flux and current vectors as state variables. Predicted torque variation, with reference to its unforced response during each sampling time interval, is imposed with the aim of determining the pulse widths of the chain voltages of the supply inverter. The
Plug-in Electric Vehicle (EV) is considered one of the most promising technology to implement the distributed storage because it combines social mobility need and environmental issue with technological function. The application of... more
Plug-in Electric Vehicle (EV) is considered one of the most promising technology to implement the distributed storage because it combines social mobility need and environmental issue with technological function. The application of Vehicle-to-Grid concept (V2G) allows the storage energy management based on EV to be economic sustainable too. In the present paper, the authors present a model to evaluate the
ABSTRACT A novel flux-weakening approach suitable for Surface-Mounted Permanent Magnet Synchronous Machines (SPMs) is presented in this paper. It consists in directly synthesizing the square magnitudes of the current and voltage vectors... more
ABSTRACT A novel flux-weakening approach suitable for Surface-Mounted Permanent Magnet Synchronous Machines (SPMs) is presented in this paper. It consists in directly synthesizing the square magnitudes of the current and voltage vectors on the basis of an accurate SPM sampled-data model and of the reference torque profile. This enables optimal and easy management of SPM operating constraints, i.e. current limitation and voltage saturation, on the basis of which the dq reference current profile can be achieved, whatever the SPM speed and Constant Power Speed Ratio (CPSR) is, i.e. finite or infinite. The effectiveness of the proposed flux-weakening approach is highlighted by both simulation and experimental results, which refer to SPMs with finite and/or infinite CPSR and driven by a predictive control algorithm.
ABSTRACT A novel electromagnetic characterization of Implantable Cardiac Medical Devices (ICMDs) is presented in this paper. It has been developed in order to determine the immunity level of ICMDs against Radio-Frequency (RF) interference... more
ABSTRACT A novel electromagnetic characterization of Implantable Cardiac Medical Devices (ICMDs) is presented in this paper. It has been developed in order to determine the immunity level of ICMDs against Radio-Frequency (RF) interference and consists of several Sensitivity Tests, which have been performed in accordance with EMC international standards. The tests have been carried out in an anechoic RF chamber, which guarantees an appropriate management of noise signal injection, shielding against external RF noise sources at the same time. In this way, the operating thresholds of an Implantable Cardiac Defibrillator (ICD) have been achieved at different heartbeat frequency, with and without high-frequency noise. As a result, the comparison between the operating thresholds highlight the electromagnetic susceptibility of the ICD under test.
ABSTRACT At the present time the direct field oriented (DFO) control is the widely used control technique in high-performance induction motor (IM) drive. It requires the implementation of a state vector observer for the detection of rotor... more
