The Mirroring of a Transient Regime of a Lathe Headstock Gearbox in the Evolution of Supplying Voltage of the AC Driving Motor

Bumbu, Neculai Eduard; Horodincă, Mihăiţă

doi:10.31926/recent.2022.66.021

Cited by 4 publications

(15 citation statements)

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“…This study uses all the computer aided experimental research facilities already depicted before in (Bumbu and Horodincă, 2022). Fig.…”

Section: The Experimental Setupmentioning

confidence: 99%

“…The evolution in time of the active electrical power (AEP) absorbed by an AC motor which drives a rotary machine (e.g. a machine-tool) and the evolution of AEP constituents: voltage, current and power factor (Bumbu and Horodincă, 2022;Horodincă, 2016) are useful indicators in rotary machine condition monitoring and diagnosis. Many papers in the literature focus on AEP evolution (measurement and processing, (Huzlík et al, 2013;Horodincă, 2016;Chifan et al, 2019)), generally based on the evolution of instantaneous voltage (IV) and current (IC) absorbed by the AC motor from the electrical supplying system (ESS).…”

Section: Introductionmentioning

confidence: 99%

“…Using a symmetrical ESS, a sample of AEP measured on a single phase describes all amount of absorbed AEP, using Eq. ( 1) already introduced in a previous work (Bumbu and Horodincă, 2022):…”

Section: Introductionmentioning

confidence: 99%

“…When we talk about transient regimes some supplementary resources are available related by the evolution of AEP constituents (U, I and cos(φ)). Our previous work (Bumbu and Horodincă, 2022) describes the resources of voltage root mean square (U) evolution during a transient regime of a lathe headstock gearbox (acceleration and deceleration); another previous work (Horodincă, 2016) describes the power factor cos(φ) evolution. This paper intends to investigate the resources of the evolution of current root mean square (I) during a similar transient regime already depicted before in (Bumbu and Horodincă, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Our previous work (Bumbu and Horodincă, 2022) describes the resources of voltage root mean square (U) evolution during a transient regime of a lathe headstock gearbox (acceleration and deceleration); another previous work (Horodincă, 2016) describes the power factor cos(φ) evolution. This paper intends to investigate the resources of the evolution of current root mean square (I) during a similar transient regime already depicted before in (Bumbu and Horodincă, 2022). Apparently it is much simpler to describe a transient regime using the current root mean square than using the AEP.…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Evolution of the Supplying Current Absorbed By an AC Driving Motor During a Transient Regime on a Lathe Headstock Gearbox

Bumbu

Horodincă

2022

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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This paper focuses on the evolution of instantaneous supplying current absorbed by an AC motor used to drive a lathe headstock gearbox during a transient regime characterised by a strong acceleration and deceleration and a strong variations of the absorbed active electrical power (with positive and negative power flows). A relationship between the current root mean square and active electrical power evolutions was established and proved in experimental terms. A severe limitation of the electrical current evolution was revealed: the impossibility to describe a negative flow of absorbed electrical power.

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“…This study uses all the computer aided experimental research facilities already depicted before in (Bumbu and Horodincă, 2022). Fig.…”

Section: The Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Study on the Evolution of the Supplying Current Absorbed By an AC Driving Motor During a Transient Regime on a Lathe Headstock Gearbox

Bumbu

Horodincă

2022

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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A Study on the Dynamics of an AC Induction Motor Rotor Based on the Analysis of Free Response at Impulse Excitation

Bumbu

Horodincă

2022

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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This paper focuses on a topic frequently involved in the dynamics of transient phenomena on rotary machines driven by an AC induction motor supplied by a three-phase four-wire electrical system: the free response of the dynamic system mirrored in the torsional vibrations of its rotor. This dynamic system is reducible at a single degree of freedom system, equivalent of a spring-mass-damper but as a torsional vibratory system composed of the motor rotor (having a moment of inertia) the rotating magnetic field (having a torsional stiffness) and a hypothetical damper (generating a viscous damping mainly due to the air friction). This free response is useful mostly to characterize the transmissibility related to the conversion of information from mechanical to electrical power through this dynamic system. A simple computer-assisted setup is used to describe indirectly and to analyze the free response (generated when the motor is switched-on or after star to delta commutation sequence), using the active electrical power absorbed by the motor.

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Improving Instantaneous Angular Speed Monitoring by Means of Sinusoidal EMF Signals Delivered by a Two-Phase n Poles AC Generator Used as a Sensor

Khdair,

Mihai,

Bumbu

et al. 2023

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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This paper introduces a new approach in instantaneous angular speed monitoring using a two-phase n poles AC generator as sensor. A two-phase n poles (n=50) stepper motor plays the role of sensor. Its rotor is firmly connected to the rotary part whose instantaneous angular speed should be measured. The sensor produces two identical sinusoidal EMF (electromotive force) signals (theoretically shifted with π/2 radians) with the same periods T. This paper proposes to use the mathematical product of the numerical descriptions of these EMF signals in order to define a new EMF signal with a period T/2 whose analysis allows the determination of 4·n=200 samples of instantaneous angular velocity on each full rotation. Each period of this new EMF signal (with an overlap of a semi period) is involved in the description of the instantaneous angular speed. In this way, the sensor is virtually converted in a single-phase 2·n poles (2·n=100) AC generator. The experimental results confirm the validity of this approach.

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The Mirroring of a Transient Regime of a Lathe Headstock Gearbox in the Evolution of Supplying Voltage of the AC Driving Motor

Cited by 4 publications

References 0 publications

A Study on the Evolution of the Supplying Current Absorbed By an AC Driving Motor During a Transient Regime on a Lathe Headstock Gearbox

A Study on the Evolution of the Supplying Current Absorbed By an AC Driving Motor During a Transient Regime on a Lathe Headstock Gearbox

A Study on the Dynamics of an AC Induction Motor Rotor Based on the Analysis of Free Response at Impulse Excitation

Improving Instantaneous Angular Speed Monitoring by Means of Sinusoidal EMF Signals Delivered by a Two-Phase n Poles AC Generator Used as a Sensor

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