Induction Motor Speed Estimation Based on Airgap Flux Measurement Using Hilbert Transform and Fast Fourier Transform

Dias, Cleber Gustavo; Silva, Luiz Carlos da

doi:10.1109/jsen.2022.3176085

Cited by 18 publications

(8 citation statements)

References 60 publications

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“…Note that the cited method applied a coreless flux sensor, being the induced voltage in this type of core very low and quite similar, in some cases, to the amplitude of the noise floor, as mentioned by [14]. As described by [12], other studies have shown the use of internal sensor for condition monitoring of rotating electrical machines [15,16]. In [17], for example, the researchers used low cost Hall-effect sensors for torque estimation in permanent magnet synchronous machines.…”

Section: Introductionmentioning

confidence: 88%

“…It should be noted that the Hall sensor was installed in order to measure the magnetic flux density perpendicular to its measuring surface. In this step, the load cell was connected to its display and the acquisition board was connected to a PC computer; ii-) Signal acquisition using a National Instruments board, rotor speed estimation using [12], RMS and Mean calculation of the sampled Hall signal, Hall sensor distance calculation and measured torque using the load transducer. In this second step, the Hall sensor signal was sampled using the acquisition board and the computer, the load torque was measured for each TIM condition.…”

Section: Methodology For Load Torque Estimationmentioning

confidence: 99%

“…The Biot Savart was also applied to stator currents (B stator ), considering a double layer for stator coils. Therefore, the complete mathematical model for simulation purposes is given by [12]:…”

Section: Effect Of the Hall Sensor Distance For Flux Measurementmentioning

confidence: 99%

“…For each sampled Hall sensor signal, as proposed by the present method, RMS value (equation ( 4)) was calculated and rotor speed was estimated using the approach proposed by one of the authors in [12]. Figure 7 shows a comparison between the airgap flux measured for each torque condition and for each Hall sensor distance for some experiments using TIM.…”

Section: Estimated Load Torque For Tim Fed By the Power Gridmentioning

confidence: 99%

“…In this sense, magnetic flux based methods arise as a relevant area for rotating electric machines analysis, due to the reduction in the costs and dimensions of the required sensors [8,11,12]. In [13], for example, the authors have proposed a method to determine the electromagnetic torque of a TIM using an external magnetic field measurement (stray flux sensor) and the phase current (current probe).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Torque estimation in three-phase induction motors under broken bars and voltage variations using airgap flux measurement and a machine learning model

Dias,

Custódio da Costa,

Fontenele

2023

Meas. Sci. Technol.

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This paper proposes a new approach for load torque estimation in squirrel cage induction motors using airgap flux measurement, by means of a Hall effect sensor installed between two stator slots of the machine. The rotor speed was estimated from the Hall sensor signal using a previous method designed by the authors, and the root mean square and mean value were also computed from the Hall signal to serve as inputs to a multi-layer perceptron model.The positioning of the Hall sensor inside the machine was also investigated during different experiments for torque prediction and considered as an additional input for the regression task. The present methodology does not require motor parameters for torque prediction. This research has been validated using some simulated and experimental results for different motor operational conditions. The performance metrics disclosed a good torque prediction for the machine fed not only by a rated voltage, but also by overvoltage/undervoltage power supply and with broken rotor bars, even for low loads. Both experimental and simulation results showed a mean absolute percentage error lower than 4% for a 7.5 kW induction motor.

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