Effect of voltage unbalance and distortion on the loss characteristics of three‐phase cage induction motor

Zhang, Dongdong; An, Ruichi; Tie-jun, WU

doi:10.1049/iet-epa.2017.0464

Cited by 42 publications

(22 citation statements)

References 25 publications

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“…Although the detrimental effects of a low PQ on electric motors are known, they are mostly neglected or ignored. However, some works cover both the analysis of the additional losses that are caused by supply voltage distortion and other papers address temperature rise and derating of motors under distortion [11][12][13][14]. Other works that are based on experiments usually have the harmonic content injected by programmable power supply [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Harmonics Consequences on Drive Systems with Induction Motor

et al. 2020

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In the case of adjustable drives systems with an induction motor (IM), a harmonic regime is manifested, whose knowledge and analysis are always necessary. However, most studies are focused on specific drive systems, the results of these works being valid only for drive systems of the same type. The objective of the present paper was to determine the harmonics consequences not only on the technical characteristics of the IM but also on the power supply as well as on the mechanical drive system. Thus, by initiating a methodology for estimating the consequences of each voltage harmonic separately, the aim was to substantiate a generally applicable method, which allows the evaluation, for any application, of the overall effects of the harmonics. The main feature of the method used in this paper was the consideration of the presence of voltage harmonics in the stator voltage of the IM, of certain frequencies and with certain levels, and the determination of all the electrical and mechanical consequences on the model of the drive system. It has been found that the harmonics of the IM affects the power quality (PQ) of the power supply, having significant influences also on the mechanical part of the drive system.

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Section: Introductionmentioning

confidence: 99%

Harmonics Consequences on Drive Systems with Induction Motor

et al. 2020

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“…Since electric motors consume a considerable part of the world's electric energy, energy savings of electric motor drives are a hot topic amongst researchers. Using a voltage-source inverter (VSI) as a power supply for the induction motor (IM) drive introduces additional losses compared to a sinusoidal supply [1,2] since the total harmonic distortion (THD) of the motor supply voltage directly contributes to the loss increase [3].…”

Section: Introductionmentioning

confidence: 99%

Iron Loss Minimization Strategy for Predictive Torque Control of Induction Motor

2020

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Today’s modern control strategies of an induction motor (IM) drive require a power source with an adjustable output voltage frequency and amplitude. The most commonly used converter topology is a two-level voltage-source inverter (VSI). However, the utilization of a VSI introduces additional voltage and current distortion, which leads to additional power losses in the machine’s magnetic circuit. Both the transistor switching frequency and the type of the inverter control determine the total harmonic distortion (THD) of the motor’s phase currents. In this paper, the influence of the inverter DC-link voltage on the iron losses of an IM controlled by a predictive torque control (PTC) is presented. It is shown that if the IM drive operates below the rated speed, it is possible to modify the PTC algorithm to reduce the additional iron losses caused by the non-harmonic inverter output voltage. The control of the DC-link voltage is achieved by using a silicon-controlled rectifier. Experiments were conducted on a 5.5 kW IM controlled by PTC, and the results are compared against a sinusoidal voltage supply created by a synchronous generator.

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“…Several researches were performed to study the detection and consequences of voltage unbalance especially on induction motors . As a result of voltage unbalance, a negative sequence current that opposes the positive sequence one is created.…”

Section: Introductionmentioning

confidence: 99%

“…5 Several researches were performed to study the detection and consequences of voltage unbalance especially on induction motors. [6][7][8][9] As a result of voltage unbalance, a negative sequence current that opposes the positive sequence one is created. This current produces a negative torque that reduces the effective torque and causes speed disturbance.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the response of thyristor‐controlled reactor using neural network

Ragab

Ghaeb

Al‐Naimi

2019

Int Trans Electr Energ Syst

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Summary In this paper, a neural network controller is proposed to retrieve the voltage balancing conditions in three‐phase power systems. The neural network is suggested to calculate the required set of firing angles for the thyristor‐controlled reactor accurately to balance the three‐load voltages quickly. The proposed controller is fed by different parameters within different feeding techniques, namely, root mean square (RMS) values of the three load voltages, RMS value of the space vector signal calculated from the three load voltages, and the RMS values of both the three load voltages and their associated space vector. The intentions of the proposed techniques are to combine between reducing the number of measured parameters and providing the controller with qualitative data about system status. The influence of the measured parameters on the neural network performance is examined by calculating the regression coefficients through several test cases. Accordingly, only the effective parameters are utilized to reduce the neural network complexity and to enhance the controller response time. Additionally, the calculations of the controller input parameters are made in terms of space vector cycle, which is half of system sinusoidal cycle. Consequently, the calculation time is reduced significantly. The Aqaba‐Qatrana‐South Amman power system is considered and modeled as a real case study. In addition, several test cases have been conducted to test and validate the ability of the proposed neural network controller in retrieving the voltage balance conditions precisely and quickly. The results have revealed the ability of the proposed neural network controller to calculate the firing angles quickly within 10 milliseconds and achieve very low voltage unbalance factor.

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Effect of voltage unbalance and distortion on the loss characteristics of three‐phase cage induction motor

Cited by 42 publications

References 25 publications

Harmonics Consequences on Drive Systems with Induction Motor

Harmonics Consequences on Drive Systems with Induction Motor

Iron Loss Minimization Strategy for Predictive Torque Control of Induction Motor

Enhancing the response of thyristor‐controlled reactor using neural network

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