Electric drive operation modes of above resonance vibration machine

The above resonance vibration machines are widely used in various industries, but have a number of shortcomings associated with increasing of the oscillations amplitude when passing the resonance zone during start-up. It is noted that to reduce the oscillations amplitude and quickly pass the resonance zone, it is advisable to use a frequency-controlled electric drive with the formation of additional control effects. Features of frequency start of the electric drive of the vibration machines are noted. The structure of the electric drive control system during passing the resonance zone in the process of starting the above resonance vibration machine in the form of a block-scheme is proposed. The algorithm of operation of the control system is given.

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“…The mechanical part of the VM mathematical model is described by a system of differential equations, which is given in [14]:…”

Section: Fig 2 Algorithm For Controlling the Start-up Of The Electric Drive Of The Above Resonance Vibration Machinementioning

confidence: 99%

The System of Forming the Control Mode of the Electric Drive During the Start-Up of the Vibration Machine

Nozhenko

Bialobrzheskyi

Rodkin

et al. 2021

RS Global - World Science

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“…At the same time, the determination of power components with the use of harmonic components of current and voltage, as stated in papers [8,9], creates the ground for the assessment of the energy process. The authors of paper [10] use the analysis of polyharmonic functions of current, voltage and power provided the analysis of the electric machine mode is performed, and in paper [11], it is used to solve the problems of identifying the parameters and characteristics of the equivalent circuit elements.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Identification of distribution features of the instantaneous power components of the electric energy of the circuit with polyharmonic current

Qawaqzeh

Bialobrzheskyi

Zagirnyak

2019

EEJET

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“…The spectrum is determined at the fundamental frequency of 5 Hz. There is a dominance of the constant power component, the 100 Hz component and the 25 Hz component due to mechanical vibration on the mo tor shaft [16,17].…”

mentioning

confidence: 99%

Influence of misalignment of connection of electrical machine shafts on the nature of electric power of the induction motor

Bialobrzheskyi¹,

Nozhenko²,

Todorov³

2022

Nauk. visn. nat. hirn. univ.

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Purpose. To identify the vibration power components caused by misalignment of electrical machine shafts in the instantaneous power of the induction motor. Methodology. The power components of the induction motor are analytically determined taking into account the power caused by torque vibrations on the shaft. Based on this, using the methods of mathematical modelling in the visual programming environment, the known model of a three-phase induction motor with a short-circuited rotor has been made. In addition, elements and connections are introduced which realize the formation of the moment caused by the imbalance of rotating masses. Using Fourier transform of the electric power of the induction motor, we determine its discrete spectrum. Experimental research is conducted on the electric power of the induction motor with a short-circuited rotor, in similar model conditions, on laboratory equipment. With the use of a virtual device synthesized in the LabVIEW package, the wavelet analysis of stator electric power of the motor of laboratory electrotechnical complex is performed. Findings. Differential equations of the induction motor with a short-circuited rotor in abc coordinate system are obtained, which reflect the distribution of instantaneous power in the machine taking into account the vibration moment. As a result of modelling according to the specified equations of the induction machine, in the conditions of full symmetry of parameters of the scheme and the mode with eccentricity of rotating masses, low-frequency vibrations of electric power of a stator with frequency of 25 Hz have been found. Similar results were obtained as a result of wavelet analysis of the electric power of an induction motor of a laboratory electrotechnical complex. Originality. Rationality of use of instantaneous electrical power of induction motor stator for detection of vibration caused by misalignment between its shaft and the shaft of another machine has been substantiated, which allows detecting vibration without complex methods of measuring vibration displacement and its derivatives. Practical value. Detecting vibration by measuring the electrical parameters of the stator circuit of the induction motor and determining the vibrations of its instantaneous power without the use of specialized equipment significantly simplify the procedure of vibration diagnostics at its early stages.

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Electric drive operation modes of above resonance vibration machine

Cited by 11 publications

References 0 publications

The System of Forming the Control Mode of the Electric Drive During the Start-Up of the Vibration Machine

The System of Forming the Control Mode of the Electric Drive During the Start-Up of the Vibration Machine

Identification of distribution features of the instantaneous power components of the electric energy of the circuit with polyharmonic current

Influence of misalignment of connection of electrical machine shafts on the nature of electric power of the induction motor

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