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Publications (17)
There are several fault types that may arise in electric motors decreasing both reliability and comfort. Eccentricity is one of the main faults, and therefore, tools are needed to detect the motors that do not fulfil the quality requirements. This paper proposes a methodology based on a novel experimental test bench to assess both static and dynami...
Electrical motors are widely used and are often required to satisfy comfort specifications. Thus, vibration response estimations are necessary to reach optimum machine designs. This work presents an improved analytical model to calculate vibration response of an electrical machine. The stator and windings are modelled as a double circular cylindric...
Improper operation of the traction machine of a lift installation causes energy waste, vibrations and noise. The design of the machine must be optimum if energy efficiency and comfort specifications have to be satisfied. The vibrations and noise frequency spectra of electrical machines present manifest peaks at certain frequencies, multiples of the...
Improper operation of the traction machine of a lift installation causes energy waste, vibrations and noise. The design of the machine must be optimum if energy efficiency and comfort specifications have to be satisfied. The vibrations and noise frequency spectra of electrical machines present manifest peaks at certain frequencies, multiples of the...
Improper operation of the traction machine of a lift installation causes energy waste, vibrations and noise. The design of the machine must be optimum if energy efficiency and comfort specifications have to be satisfied. The vibrations and noise frequency spectra of electrical machines present manifest peaks at certain frequencies, multiples of the...
Noise and vibration of electrical machines is a major concern. Changes in the machine design to improve its efficiency can lead to unacceptable vibrations. Tools to predict its vibratory and acoustic performance at the design stage need to be developed. An improved finite element model has been developed to analyse the vibration behaviour of a perm...
Noise and vibration of electrical machines is a major concern. Changes in the machine design to improve its efficiency can lead to unacceptable vibrations. Tools to predict its vibratory and acoustic performance at the design stage need to be developed. An improved finite element model has been developed to analyse the vibration behaviour of a Perm...
Vertical vibrations affect passenger comfort during an elevator travel. This work presents the results of a study of vertical vibrations caused by torque ripple generated at the elevator drive system. Tests are performed on a 1:1 roping configuration laboratory model; the acceleration response at the suspended masses and at the drive machine, the m...
In this paper vertical vibration measurements performed on a laboratory model of an elevator system have been presented and analysed. The laboratory model consists of a machine system that drives two rigid masses representing an elevator car and a counterweight, constrained by guide rails to move vertically through a sheave and hoist rope. Simultan...
Vertical vibrations affect passenger comfort during an elevator travel. In this work the results of a study to
investigate the vertical vibrations caused by torque ripple generated at the drive system and transmitted
through the suspension ropes to the car is presented. The acceleration response at the suspended masses and at the drive machine end...
Vertical vibrations affect passenger comfort during an elevator travel. Hoist ropes, due to their flexibility,
loading conditions, and relatively low internal damping characteristics, largely determine the resonances
within the system and, therefore, the amount of vibration. In this work the results of a study to investigate the
vertical vibration...
The drive system is a key component of an elevator installation that supplies energy into the system, coupling the car-rope and the counterweight-rope subsystems. However, it often becomes a source of excitation that is responsible for vibrations that compromise the car ride quality. In this paper a non-stationary distributed-parameter model descri...
A non-stationary distributed model of the vibration of an elevator system that accommodates the following aspects has been developed: machine and drive dynamics, the longitudinal response of the rope-car-counterweight system, the coupling effects across the traction sheave and the response to excitation sources such as the torque ripple. Hamilton’s...
A non-stationary distributed model of the longitudinal vibration of a lift system that includes the dynamics of the drive machine is developed. The non-stationary character of the system is due to the time-varying length of the suspension cables. The input to the system is the machine torque and the output is the displacement of any point of either...
This paper presents a technique for the computer-aided design for synthesis of discrete controllers based on some called special compensation methods, namely, high-gain design and gain-insensitive designs and Truxal's and algebraic methods. The pole-placement synthesis method is also included in the software package which has a modular structure. E...
Mondragon Unibertsitatea nola osatuta dagoen azaltzen digu artikulu labur eta zehatz honen hasieran Javier Arrasatek. Euskararen egoera fakultate ezberdinetan zein den azaltzen digu jarraian: Humanitate eta Hezkuntza Zientzien Fakultatean sartzen diren ikasle guztiak euskaldunak dira, eta eskoletan euskara da nagusi; euskaraz gain, gaztelera eta in...