Entity

Time filter

Source Type


Morales-Caporal R.,Technological Institute of Apizaco | Pacas M.,University of Siegen
IEEE Transactions on Industrial Electronics | Year: 2011

This paper presents a digital strategy to suppress magnetic- and cross-saturation effects in a sensorless predictive direct-torque-controlled synchronous reluctance machine (SynRM). In SynRMs, the angular position of the rotor can be estimated by using inductance variations due to geometrical effects of the rotor. However, magnetic- and cross-saturation effects lead to large errors on the estimated angular position, particularly when the magnetization level and torque load change. This error deteriorates the performance of the electrical drive when the estimated position of the rotor is used instead of the measured one in a sensorless control scheme. In this paper, it is shown how saturation effects can be readily alleviated by using a digitally implemented quadrature phase-locked loop observer, together with linear regression, so that easy digital implementation, stable operation, and null parametric dependence can be achieved. The experimental results at very low and zero speeds verify the effectiveness of the proposed sensorless control scheme. © 2006 IEEE. Source


Caporal R.M.,Technological Institute of Apizaco | Pacas J.M.,University of Siegen
International Power Electronics Congress - CIEP | Year: 2010

This paper introduces a technique to estimate the angular position of the rotor of an industrial servo motor with rotor saliency. The estimation technique is based on injection of Test Voltage Signals (TVSs). The TVSs generate stator current transients which are exploited in order to acquire the required rotor position information. Then, the obtained information is processed through a tracking observer to extract useful position signals. Following this strategy no extra hardware, especial current transducers or connections are needed in comparison with a standard servo drive with an encoder. The technique is effective at zero and very low stator frequencies of operation, where the back EMF is very low and model based sensorless techniques commonly fail. Experimental results at very low and zero stator frequency of operation verify the effectiveness of the investigated sensorless strategy. © 2010 IEEE. Source


Rangel-Magdaleno J.,National Institute of Astrophysics, Optics and Electronics | Peregrina-Barreto H.,National Institute of Astrophysics, Optics and Electronics | Ramirez-Cortes J.,National Institute of Astrophysics, Optics and Electronics | Morales-Caporal R.,Technological Institute of Apizaco | Cruz-Vega I.,National Institute of Astrophysics, Optics and Electronics
Shock and Vibration | Year: 2016

The relevance of the development of monitoring systems for rotating machines is not only the ability to detect failures but also how early these failures can be detected. The purpose of this paper is to present an experimental study of partially damaged rotor bar in induction motor under different load conditions based on discrete wavelet transform analysis. The approach is based on the extraction of features from vibration signals at different level of damage and three mechanical load conditions. The proposed analysis is reliable for tracking the damage in rotor bar. The paper presents an analysis and extraction of vibration features for partially damaged rotor bar in induction motors. The experimental analysis shows the change in behavior of vibration due to load condition and progressive damage. © 2016 Jose Rangel-Magdaleno et al. Source


Sandre-Hernandez O.,National Institute of Astrophysics, Optics and Electronics | Rangel-Magdaleno J.J.,National Institute of Astrophysics, Optics and Electronics | Morales-Caporal R.,Technological Institute of Apizaco
2015 12th International Conference on Electrical Engineering, Computing Science and Automatic Control, CCE 2015 | Year: 2015

This paper presents a predictive direct torque control (PDTC) for a surface permanent magnet synchronous machine (PMSM). The control algorithm uses linear predictions of the controlled variables to preselect four possible active voltage space vectors (AVSVs) to build the torque demand one step in advance. Then, the trajectory of the torque and flux are predicted and evaluated to minimize the defined cost function, the AVSV that minimize the error is selected and applied in the next control cycle. With this control scheme is possible to obtain a fast dynamic performance similar to the conventional direct torque control, with the advantages of a constant switching frequency and a larger sample time. The control scheme is simulated using Matlab/Simulink to verify the performance under steady and dynamic operation. © 2015 IEEE. Source


Sandre-Hernandez O.,National Institute of Astrophysics, Optics and Electronics | Rangel-Magdaleno J.J.,National Institute of Astrophysics, Optics and Electronics | Tlelo-Cuatle E.,National Institute of Astrophysics, Optics and Electronics | Morales-Caporal R.,Technological Institute of Apizaco
2015 IEEE International Autumn Meeting on Power, Electronics and Computing, ROPEC 2015 | Year: 2015

This paper presents the cosimulation of the model predictive control (MPC) for a permanent magnet synchronous machine (PMSM) based on the technology of field programmable gate array (FPGA). One of the problems that occurs during the digital implementation of MPC control schemes due to its high computational burden is a time delay from the moment in which the controlled variables are sampled and the moment in which the control action is applied, this delay can affect the performance of the system if is not taken into account. To overcome this problem this paper presents a simple delay compensation based on the mathematical model of the machine. Simulations results using hardware description are presented in order to point out the effects of the delay introduced and to validate the presented delay compensation technique. © 2015 IEEE. Source

Discover hidden collaborations