Motor Starting Research Articles

Beyond sleep disturbance: Structured analysis of sleep habits, chronotype and sleep disorders in adults with glioma. A cross-sectional exploratory study

ObjectiveTo evaluate the prevalence of the whole spectrum of sleep disorders as well as sleep related motor phenomena and chronotype in adults with glioma and to analyze their link with tumor localization and grade. MethodsThis prospective cross-sectional exploratory study included 79 patients with glioma irrespective of localization and type. Sleep habits, sleep disorders of any kind and chronotype were evaluated in structured interviews using validated disease specific scales. ResultsFor the whole sample the PSQI score was not increased, and specific insomnia severity was low. Patients with frontal tumors had worse sleep quality according to the PSQI and were more often allocated to worse ISI categories. The prevalence of EDS was markedly increased (ESS >10 in 17.7 % of patients), and 43 % scored ≥3 on STOPBANG. The predominant chronotype was a moderate morning type (54.4 %). Seven patients fulfilled RLS criteria and 9 fulfilled criteria for probable RBD, a self-report of hypnic jerks and nightmares were most common (45.6 % and 31.6 % respectively). According to regression analyses tumor relapse, depressive symptoms and fatigue determined poor sleep quality (Nagelkerke's R2: 0.511 p < 0.001), while performance-status, fatigue and anti-seizure medication contributed to excessive daytime sleepiness (Nagelkerke's R2: 0.600, p < 0.001), and age, BMI, and tumor localization contributed to the risk of sleep apnea (Nagelkerke's R2: 0.556, p < 0.001). ConclusionsThis study shows the broad range of sleep symptoms in glioma patients, and a complex association with tumor grade and localization. This underlines the need for a comprehensive evaluation of sleep related symptoms in glioma patients.

Four Quadrant Operation of Induction Motor Using H-Bridge in Harsh and Noxious Environment Field with Dust, Voltage Fluctuation and Major Load Variations

The investigation and findings show that the H Bridge variable frequency drive is the optimum choice for resolving intrinsic motor problems and energy conservation. Variable frequency drives outperform other strategies like soft starters because they offer numerous benefits over other techniques, including greater versatility and control over the motor's starting and stopping capabilities. Dynamic torque control, overload protection, and power reduction during idle are other essential aspects of variable frequency drives. Conserving energy to the greatest extent possible is one strategy to avoid energy shortages. It has been reported that 75% of the electrical energy generated globally is used by motors. It has been noted that the main problem with motors is that they use a lot of current to start. As a result, high inrush current produces excessive heat, reducing the lifespan of electrical equipment and using more electricity. Reducing the initial inrush current to a manageable level is advised. By using an induction motor and the H Bridge, this current can be decreased. H Bridge uses a technique known as variable speed drive, which is often referred to as variable torque drive, to control the speed and torque of AC induction motors. Pulse width modulation is used to monitor the motor's voltage and torque in this occurrence. Although there are several methods to reduce the motor's current, such as by employing soft starts, variable torque drives are more advantageous. The strong starting torque and flexible speed control of DC motors make them useful in a range of applications. However, because of the cost and commutation, there are a few significant problems. As a result, the PWM-powered H bridge inverter extends the life of machinery and provides electricity to electrical appliances in response to demand. The fact that it is an energy-saving gadget, however, is by far its greatest advantage. This is especially important in a country like India, where the energy crisis has halted economic growth.

Exploring the impact of aerobic exercise on sleep quality in older adults: A systematic review

Problem: Sleep disturbances are common and impact health, yet the most effective exercise modalities for improving sleep quality remain unclear. This study aims to evaluate the effectiveness of aerobic and resistance training in enhancing sleep quality and related health outcomes. Purpose: The purpose of this study is to examine the effectiveness of various exercise modalities, including aerobic and resistance training, in improving sleep quality and related health indices, and to determine the most helpful techniques for managing sleep disruptions in old. Methods: This study utilized a systematic literature review approach, gathering and analyzing scientific articles on the effects of exercise on athlete immune function. Articles were sourced from Scopus using search terms such as "aerobic exercise" OR "aerobic training" OR "cardiovascular exercise" OR "endurance exercise" AND "sleep quality" OR "sleep disturbance" OR "sleep improvement" OR "sleep duration" OR "sleep patterns" OR "insomnia" AND "elderly" OR "older adults" OR "aging population" OR "senior citizens" OR "aged" AND "effect" OR "impact" OR "outcome" OR "influence" with a focus on studies published within the past five years that evaluate exercise interventions on immune enhancement in athletes. After collecting relevant articles, descriptive analysis was conducted to identify consistent patterns and findings. Results: Aerobic exercise was consistently the most effective intervention for improving overall sleep quality, including sleep efficiency, duration, and deep sleep, along with cognitive function and inflammation markers. Resistance and combined training also demonstrated significant benefits, with resistance training enhancing sleep onset latency and duration. These findings highlight exercise as a versatile, non-pharmacological approach to improving sleep health in diverse populations. Aerobic exercise was consistently the most effective intervention for improving overall sleep quality, including sleep efficiency, duration, and deep sleep, along with cognitive function and inflammation markers. Resistance and combined training also demonstrated significant benefits, with resistance training enhancing sleep onset latency and duration. These findings highlight exercise as a versatile, non-pharmacological approach to improving sleep health in diverse populations. Conclusion: This systematic study suggests that aerobic exercise improves sleep quality in older persons. Sleep disturbances decreased and sleep efficiency, total sleep time, and sleep start latency improved in multiple studies.

The use of CRISPR-Cas9 technology for targeted gene therapy in Parkinson's disease focusing on LRRK2 and SNCA genes

Parkinson's disease (PD) is a neurodegenerative disorder characterized by the progressive degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to the start of motor and non-motor symptoms. These include bradykinesia, resting tremor, rigidity, and postural instability, alongside cognitive impairments, mood disorders, and autonomic dysfunctions. The hallmark of PD is the accumulation of α-synuclein protein aggregates, forming Lewy bodies within the neurons. Given the numerous causes of Parkinson’s, involving genetic, epigenetic, and environmental factors, therapeutic treatments are hard to come by. Traditional pharmacological treatments, such as levodopa and dopamine agonists, primarily offer symptomatic relief and are associated with diminishing efficacy over time. Therefore, there is a need for new therapeutic approaches that target the disease at its roots. CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) technology, with the RNA-guided Cas9 endonuclease enables precise, targeted modifications at the genomic level. This technology offers potential for terminating the genetic factors causing parkinsons and aid in developing gene-based therapies. By attempting to regulate gene expression, CRISPR holds promise for addressing the fundamental causes of neurodegeneration in Parkinsons. One of the key genetic targets in PD is the leucine-rich repeat kinase 2 (LRRK2) gene, where specific gain-of- function mutations, such as G2019S, lead to hyperactivation of its kinase activity, contributing to neurotoxicity. CRISPR-Cas9 can be employed to introduce precise double-strand breaks at the mutation site, followed by homology-directed repair (HDR) to restore the wild-type sequence, thereby normalizing LRRK2 function and preventing neuronal death. Similarly, CRISPR technology can target the SNCA gene, which encodes α-synuclein. Pathogenic duplicates or triplicates of SNCA result in overproduction of α-synuclein and subsequent aggregation. Utilizing CRISPR to disrupt these extra copies can reduce α-synuclein levels, alleviating its toxic effects.CRISPR activation (CRISPRa) and interference (CRISPRi) systems enable fine-tuned upregulation or downregulation of gene expression, offering strategies to increase the expression of neuroprotective factors or suppress the expression of deleterious genes.

Greening Your Drive: A Method of Effective Conversion from IC Engine Based Vehicle to EV

This research presents the most efficient method for turning vehicles with internal combustion engines (IC engines) into electric vehicles (EVs). With an emphasis on reducing the environmental footprint and optimizing energy efficiency, our strategy includes cutting-edge technology in electric powertrain parts, power electronics, and battery storage systems. This paper assesses performance indicators by thoroughly analyzing the integration of new electric drivetrain components and the retrofitting of old ones, including motor starting and energy usage. To produce energy-efficient EVs, we suggest a supercapacitor bank and an effective battery cooling system. The recommended approach, Safety concerns, environmental advantages, and economic viability are also covered. The suggested approach shows promise in terms of lower production of greenhouse gases, increased range, and cost-effectiveness. The results provide an efficient way of battery cooling system and efficient use of battery storage by integrating a supercapacitor bank. The outcomes support the worldwide trend towards environmentally sound methods of transportation by providing important insights that will accelerate the widespread use of sustainable EVs.

A Correlational Study Between Quality of Sleep and the Smartphone Usage among the Students of Dy Patil College of Nursing and Dy Patil College of Physiotherapy Kolhapur

Introduction: Introduction: As multipurpose gadgets that offer information, entertainment, and communication, cellphones have become an essential part of daily life in the current digital era. But their widespread presence, particularly at night, raises serious questions about how they affect the quality of sleep. A burgeoning public health concern is the rising incidence of sleep disorders. Sleep is essential for good health since it affects mental clarity, emotional control, and physical well-being. Because blue light from screens suppresses the production of melatonin, the hormone that controls sleep-wake cycles, it can throw off the circadian rhythm. Moreover, engaging with stimulating content might postpone the start of sleep, such as social media or work-related activities. Sleep is aggravated by psychological reliance on smartphones, which is typified by obsessive notification monitoring and fear of missing out (FOMO). Methodology: Using a non-experimental, descriptive methodology, the study used a correlational survey approach. 500 students from D.Y. Patil College of Physiotherapy and D.Y. Patil College of Nursing, who were chosen by non-probability convenience sampling, were among the participants. The Smartphone Addiction Short Version Scale (SAS-SV) and the Pittsburgh Sleep Quality Index (PSQI) were employed. The Karl Pearson correlation coefficient test was administered through an online Google Forms questionnaire. The investigation was carried out on April 16, 2024. Findings: The participants' average age was 21.43 ± 2.91 years. Due to their use of smartphones at night, the majority of participants (55.00%, or 345 students) reported having severe sleep difficulties. With a median score of 11 and a mode of 10, the PSQI score was 11.18 on average. 3.22 was the standard deviation, and the range was16. The majority of pupils showed a solid understanding of sleep disorders. At the P &lt; 0.05 level, the estimated t-value (tcal = 1.9564) was found to be more than the crucial value (ttab = 1.9432), suggesting a moderately positive association that is statistically significant between smartphone usage and sleep quality. In summary, the results indicate that most participants had a moderate understanding of sleep disorders, and there was a moderately positive link between smartphone usage and sleep quality.

Game-Changer: Unlocking Student-Athlete Success with Sleep and Later School Start Times

This editorial explores the crucial yet often overlooked role of sleep in enhancing student-athlete performance and well-being. It highlights sleep’s impact on physical recovery, cognitive function, and emotional stability, emphasizing the unique benefits for athletes. The editorial examines the detrimental effects of early school start times on adolescent sleep patterns and their subsequent impact on academic and athletic performance. By advocating for policy changes that prioritize sleep, such as delaying school start times, this editorial presents a novel approach to optimizing student-athlete success. Through a synthesis of current research and practical insights, it urges stakeholders in education and sports to recognize and act upon the foundational importance of sleep, positioning it as a key component of athletic and academic excellence.

An exploration into the sleep of workers on block-calving, pasture-based dairy farms

The benefits of sufficient and high-quality sleep for people are well documented. Insufficient sleep increases the risk of accidents, injuries, and negative health implications for people. This is especially relevant for farmers because they work with large animals and machinery. Dairy farming often requires early start times and long days, particularly over the high-workload calving period in block-calving, pasture-based systems. However, there is little published data quantifying the sleep quantity and quality of farmers over this period. In this study, the sleep patterns of workers (n = 33) on 10 New Zealand dairy farms were measured for 90 d over the spring calving period using a sleep measuring device (Oura ring, Oura Health Ltd., Oulu, Finland). Total sleep time (TST) averaged 6 h 15 min, lower than the required 7 to 9 h for optimal wellbeing and cognitive functioning. The TST decreased over the calving period and was significantly correlated with both sleep start and wake times. Factors such as work start time, farm location, and role on farm influenced sleep quantity and quality. Further research is required to better understand sleep and its effect on dairy farmers, over both the calving period and the remaining months of the year.

Metrology of two wearable sleep trackers against polysomnography in patients with sleep complaints.

Sleep trackers are used widely by patients with sleep complaints, however their metrological validation is often poor and relies on healthy subjects. We assessed the metrological validity of two commercially available sleep trackers (Withings Activité/Fitbit Alta HR) through a prospective observational monocentric study, in adult patients referred for polysomnography (PSG). We compared the total sleep time (TST), REM time, REM latency, nonREM1 + 2 time, nonREM3 time, and wake after sleep onset (WASO). We report absolute and relative errors, Bland-Altman representations, and a contingency table of times spent in sleep stages with respect to PSG. Sixty-five patients were included (final sample size 58 for Withings and 52 for Fitbit). Both devices gave a relatively accurate sleep start time with a median absolute error of 5 (IQR -43; 27) min for Withings and -2.0 (-12.5; 4.2) min for Fitbit but both overestimated TST. Withings tended to underestimate WASO with a median absolute error of -25.0 (-61.5; -8.5) min, while Fitbit tended to overestimate it (median absolute error 10 (-18; 43) min. Withings underestimated light sleep and overestimated deep sleep, while Fitbit overestimated light and REM sleep and underestimated deep sleep. The overall kappas for concordance of each epoch between PSG and devices were low: 0.12 (95%CI 0.117-0.121) for Withings and VPSG indications 0.07 (95%CI 0.067-0.071) for Fitbit, as well as kappas for each VPSG indication 0.07 (95%CI 0.067-0.071). Thus, commercially available sleep trackers are not reliable for sleep architecture in patients with sleep complaints/pathologies and should not replace actigraphy and/or PSG.

Optimization and Improvement of Three-phase Asynchronous Motor Soft Starter Control Circuit

Abstract The soft starters of ABB company are used in a pumped storage power station. Sometimes, a phase absent fault was reported during the process of the motor starting and then led to starting failure. To solve this problem, this article first explained the working principle of the device, and then analyzed the design of the control circuit and the characteristics of the components. Combined with the actual inspection results to find the crux of the problem, It proposed optimization and improvement methods for the soft starter control circuit, and achieved the desired results.

Ultracapacitor Based Voltage Sag Compensation in Armored Vehicles

The article describes the voltage sag compensation of a DC bus and improved regulation of battery voltage while starting a diesel engine starter motor using continuously acting ultracapacitor modules with an equivalent series resistance energy sharing principle in an armored fighting vehicle. in general, the starter motor draws large power during starting, thereby demanding a large inrush current that is fed by the battery power system. This causes a large fall in the terminal voltage of the battery. This paper proposes a 24 V, 800 Ah Li-Acid Storage Device Bank with a 300 F, 30 Volt Ultracapacitor Module that energizes an 11-Kilowatt starter motor, which initiates the rotation of a diesel engine shaft. The time-based structures of lead-acid power sources, ultracapacitors, and starter motors will be analyzed and simulated based on the experimental results. The complete circuit was verified by MATLAB/SIMULINK Software, where voltage sag is reduced while starting a starter motor from 19.1 V to 22.3 V and 75.11% of energy is shared by the ultracapacitor. The same configuration with a reduced ultracapacitor rating of 63 F and 30 V has been implemented in hardware, and the voltage sag is limited from 18.9 V to 21.1 V with 27% of the energy shared by the ultracapacitor. Both simulation and hardware results are implemented and verified.

СИНТЕЗ ЭЛЕКТРОПРИВОДА КОМПРЕССОРНОЙ УСТАНОВКИ ЭЛЕКТРОВОЗА

The study objective is to improve the reliability and energy efficiency of the electric locomotive compressor drive. To achieve this, the required power of the electric motor was calculated the performance of the compressor unit, the volume of the main tanks and the selected electric motor were checked to start and adjust the capacity at low supply voltage. The task to which the paper is devoted is to design an electric drive for a compressor motor. A vector model of an asynchronous motor was made. The process of direct start-up and starting an asynchronous electric motor with the use of a scalar control system and IR compensation were modeled. Research methods: systematic approach; provisions of the theory of automatic control and electrical engineering; numerical PC simulation using Matlab software package. The novelty of the work is in the use of a frequency-controlled electric drive to start the asynchronous electric motor of the compressor unit instead of the normally installed starting capacitors. This design solution will significantly reduce the amplitude of the starting currents, which in turn will reduce the wear of the winding insulation. The study results are presented, based on the results of the constructed models, as graphs of the dependencies of speed and current during direct start of the electric motor and with the control system. Conclusions: the scalar control system, thanks to the introduction of an intensity setter, as well as IR compensation diagram, allow extending the transition time and controlling the value of the inrush current in acceptable values. Such an approach to make an electric drive compressor motor is able to significantly increase its reliability and service life, as well as to increase the overall energy efficiency of the system.

An Integrated Detection-Prognostics Methodology for Components With Intermittent Faults

Abstract Some industrial components, such as valves, relay switches, and motors, occasionally experience intermittent faults (IFs) that usually disappear without any repair or intervention. This phenomenon occurs at a relatively low frequency even in components that are in an “as-good-as-new” state. However, an increase in the frequency of IFs often indicates the onset of degradation. We develop an integrated detection-prognostics model for components that exhibit IFs and whose degradation data are high-dimensional. We discuss the use of dynamic time warping (DTW) and a variational autoencoder (VAE) to perform feature engineering on the data. We then propose a hidden Markov model (HMM)-based monitoring strategy composed of two parts: (1) a detection model that tracks and flags changes in the intermittent fault frequency (IFF) and (2) a prognostic model that leverages how the transition probabilities of the HMM evolve with progressive degradation to compute the remaining life distribution (RLD) of the component. We examine the performance of our modeling framework using high-dimensional data generated from a vehicular electrical system testbed designed to accelerate the degradation of a vehicle starter motor.

Research on Operation Characteristics of Permanent Magnet Synchronous Motor at Zero and Low Speeds Based on Pulse Vibration High-Frequency Injection Method

In order to reduce costs, compress space, and improve system stability under harsh operating conditions, the current vehicle motor drive systems often use position sensorless control methods. However, due to the introduction of filters and the hysteresis of position observers, the position sensorless control has the problem of deteriorating dynamic performance when vehicles start from zero and low speeds or their loads change. Therefore, this article focuses on the problem of position sensorless control applied by permanent magnet synchronous motors when vehicles start and operate at zero and low speed. Combined with high-frequency pulse vibration injection method, the relationship between the types of position observers, parameter selection, and position tracking performance is analyzed and compared. The short-pulse injection method is proposed to locate the initial position of the motor, overcoming the inherent 180° position deviation of pulse vibration high-frequency injections. Subsequently, the impact of the amplitude and frequency of the injected high-frequency signal on the performance of position estimation is focused on. Considering the adverse effects caused by the phase delay of the filter, a design method for filter parameters is proposed to achieve a smooth start and operation of the permanent magnet synchronous motor under position sensorless control. Finally, the rationality of the theoretical analysis and the effectiveness of the adopted methods are fully verified through simulation and experiments.

Options for the structure of an autonomous electric power system with a battery of hydrogen fuel cells

Background. Recently, interest in the problem of reducing the emissions of hydrocarbon fuel combustion products into the atmosphere and the use of alternative and renewable energy sources has sharply increased. This problem is relevant to both stationary and transport energy. One of the ways to reduce the harmful impact of primary energy sources in autonomous transport power plants on the environment is their hybridization, i.e., use, along with traditional energy sources (turbogenerators and diesel generators), of hydrogen sources of electricity (fuel cell batteries).&#x0D; Aim. This study presents a justification of the optimal variant of the structure of an autonomous electric power system with a combined power plant based on hydrogen sources of electricity.&#x0D; Materials and Methods. To achieve this goal, a comparative analysis of the parameters and characteristics of the power system elements was performed, as well as a method for modeling processes in the power system under study using the MATLAB Simulink package. Two options for the structure of an autonomous electric power system are being considered, namely, a common AC and DC bus. An analysis of the parameters and characteristics of these options was performed for three typical operating modes, namely, turning on a static load, direct starting of an asynchronous motor with a load on the shaft, and transferring consumers from power from a diesel generator to power from a battery of hydrogen fuel cells.&#x0D; Results. In all considered modes, the VTE battery is characterized by a rapid response to load changes and stable efficiency. The nature of transient processes is aperiodic or low oscillatory, rapidly decaying. In terms of the number of semiconductor converters, filtering devices, and their total power, the structure of an autonomous power system with a common AC bus is more preferable.

A novel power quality improved AC voltage controller for soft starting of squirrel cage induction motors

A novel power quality improved AC voltage controller for soft starting of squirrel cage induction motors

Regeneration of Hybrid and Electric Vehicle Batteries: State-of-the-Art Review, Current Challenges, and Future Perspectives

Batteries have been integral components in modern vehicles, initially powering starter motors and ensuring stable electrical conditions in various vehicle systems and later in energy sources of drive electric motors. Over time, their significance has grown exponentially with the advent of features such as “Start &amp; Stop” systems, micro hybridization, and kinetic energy regeneration. This trend culminated in the emergence of hybrid and electric vehicles, where batteries are the energy source of the electric traction motors. The evolution of storage for vehicles has been driven by the need for larger autonomy, a higher number of cycles, lower self-discharge rates, enhanced performance in extreme temperatures, and greater electrical power extraction capacity. As these technologies have advanced, so have they the methods for their disposal, recovery, and recycling. However, one critical aspect often overlooked is the potential for battery reuse once they reach the end of their useful life. For each battery technology, specific regeneration methods have been developed, aiming to restore the battery to its initial performance state or something very close to it. This focus on regeneration holds significant economic implications, particularly for vehicles where batteries represent a substantial share of the overall cost, such as hybrid and electric vehicles. This paper conducts a comprehensive review of battery technologies employed in vehicles from their inception to the present day. Special attention is given to identifying common failures within these technologies. Additionally, the scientific literature and existing patents addressing regeneration methods are explored, shedding light on the promising avenues for extending the life and performance of automotive batteries.

Kajian Kriminologi Terhadap Aksi Pencurian Kendaraan Bermotor Roda Dua

Introduction: The crime of theft of two-wheeled motor vehicles is a crime against property that is not uncommon in developing countries. However, the level of public awareness of the importance of protecting personal property is often ignored, so there are easily many opportunities for criminals to carry out their evil actions.Purposes of the Research: to study and discuss the factors causing the theft of two-wheeled motor vehicles in the jurisdiction of the Ambon Island Police and Lease Islands. As well as to review and discuss the efforts of the Ambon Island Police and Lease Islands in handling the theft of two-wheeled motorized vehicles.Methods of the Research: In this study is empirical juridical. Research location of the Ambon Island Police and Lease Islands. Population is the entire research unit that will be researched and then analyzed, Sample is the set of the population, Respondents are people who will answer questions asked by researchers for research purposes. The data source used is primary data and secondary data. Data collection techniques are carried out by interviews and documentation studies. Data analysis techniques are carried out qualitatively.Results of the Research: Shows that the factors causing the theft of two-wheeled motorized vehicles in the jurisdiction of the Ambon Island Police and Lease Islands are: The economic factor is the most influencing factor so that a person can commit a crime. The educational factor, when associated with the background of the crimes committed, is that the average perpetrator has low education. Environmental factors, whether good or bad, a person's behavior is strongly influenced by his social environment. The factor of negligence of users of two-wheeled motorized vehicles, crime of theft often arises due to the negligence of the user himself, for example by forgetting to lift the key, not locking the motor starter and others. -Lease islands namely: Preemptive efforts are the initial efforts made by the police to prevent the occurrence of the crime of theft of two-wheeled motorized vehicles, preventive efforts are carried out to prevent crimes from occurring. Meanwhile, repressive efforts are efforts to take action in the form of arrests for further legal proceedings against perpetrators who commit theft of two-wheeled motorized vehicles.

Power Compatibility of Induction Motors in Industrial Grids Containing Synchronous Generators

Starting an induction motor causes voltage sag in the industrial grid that may disturb the operation of grid equipment. Direct-on-line starting is the simplest and most cost-effective method for starting induction motors, but also the most problematic. Large industries often use internal power plants with synchronous generators and starting powerful motors may impact the generator operations. The synchronous generators could be operated with the automatic or manual mode of voltage control. As the operation experience proves, the generator voltage control mode has a significant impact on the transient behaviours in the industrial power grid when starting a large induction motor. This article presents a case study of the synchronous generator tripping within a true medium-voltage industrial grid during the direct-on-line starting of a large induction motor driving the feed water pump. An analysis of the generator protection logs after the tripping showed that the synchronous generator was controlled in manual mode and its protection relay settings were exceeded. The transients initiated by induction motor starts were studied for possible configurations and operating conditions of the grid using a model developed on the Matlab/Simulink Software platform. The simulations have shown that concern about starting large motors in industrial grids containing internal synchronous generators needs to be solved considering the grid configurations and the coordination of generator protection and control devices.

Electric Motor Maintenance

Electric motors play a vital role in industrial operations, and their protection from overloading is crucial for ensuring longevity, safety, and efficiency. This article explores the significance of motor overload protection devices in safeguarding motors from damage caused by overloading, which can lead to overheating and potential failure. It discusses the functioning of various protection devices, such as thermal, magnetic, and electronic overload relays, and emphasizes the importance of selecting the right device based on motor type, size, application, and environmental conditions. The article also highlights the role of regular maintenance and adherence to safety standards in ensuring the reliable and effective functioning of these protection systems. By implementing appropriate protection measures, companies can optimize energy use, increase operational efficiency, and reduce damage and production disruptions, thus contributing to the sustainability and safety of electric motors in industrial settings vulnerable to overloading. Highlight : Overload relays protect the motor, motor branch circuit, and motor branch circuit components from excessive heat from the overload condition Overload relays are part of the motor starter and protect the motor by monitoring the current flowing in the circuit The selection of an overload relay is important because repeated tripping and reset can reduce the mechanical life of the relay and may cause damage to the motor Keywords: electric motors, overload protection devices, thermal overload relays, magnetic overload relays, electronic overload relays, motor type.