Baldor Electric (United States)

This article is a condensed version of a case study of Gram Sahas in Scheduled Areas of Rajasthan, India conducted under a University Grants Commission of India sponsorship considering the Panchayats (Extension to Scheduled Areas) Act, 1996 (PESA). The study arose from the scholarly intent of the researcher to probe into the apparatus created in the wake of the 73rd constitutional amendment with regard to specific provisions for Scheduled Areas in general and Rajasthan in particular.

The information technology advancement during the 5.0 era has made most human activities take place online. Student activities mostly depend on the use of online media, especially social media for learning needs, entertainment, and business activities. For business activities in particular, with the students' speed of adoption and adaptation on social media, students have a great opportunity to maximize all the advantages of social media. The purpose of this study was to identify the use of social media by Bali State Polytechnic (herein after refers as BSP) students for business activities. As a vocational college focused on applied subjects the use of appliedbased applications by directly becoming an actor in the business world is very necessary. This study uses the Uses and Gratifications theory to explain the students' behavior in utilizing social media for business activities. with a random sampling survey, 33 students (respondents) were obtained who use social media for business activities. The result shows that characteristics of respondents, namely active students who run their business through promotions on social media, are at most 20 years old (37%), most are at the fourth diploma level (73%), the most respondents are from the fourth semester (46%), with the most businesses being run in the food and beverage sector (37%), and businesses running through social media for one year (58%). The most used social media is Instagram (36%), then the second one is WhatsApp which is also a supporter of consumer feedback communication. The most uploaded contents in the social media are a combination of photo, written and video, as many as 52% of respondents. The involvement of other parties in the creation of social media content is mostly maximizing consumer testimonials as many as 76% of respondents. The best time to do activities on social media is from 18.00 to 22.00 (30% of respondents), with a duration between 1 to 3 hours (73% of respondents) every day. The model of using social media in business activities by respondents with three important things, namely managing time for lecture activities and social media activities, creating social media content, and involving other parties (testimonials and influencers) to upload social media content.

Industry standards, including IEEE 112, have for many years characterized the component losses of three-phase induction motors as primary and secondary I2R, core, friction and windage, and stray load loss. The definitions of each of the losses, as epitomized in IEEE 112, guarantee that a significant part of the losses will be characterized as stray load loss. It also guarantees that the secondary I2R loss will be underestimated and that the core loss associated with field distortions due to load current are not properly identified. This paper will discusses issues with existing test standard loss models and describe model methods that better characterization motor losses, providing the opportunity to further optimize motor efficiency.

Capacitor bank switching on medium voltage power systems has been in practice for nearly half a century. However, capacitor bank switching causes high inrush currents and voltage transients (as high as 3.0 p.u.) in the power distribution system potentially damaging electrical equipment, impacting the system reliability and power quality. Additionally, capacitor switching transients affect the life of the capacitor itself and can cause damage or sudden failure. Pipeline substations are often located in remote areas with insufficient SCC available on the distribution system to start a large medium voltage induction motor. In many such instances, the end user often ends up using a medium voltage soft-starter, a higher rated MVA transformer in conjunction with a reactor start, or a low inrush motor with less than ideal motor efficiency. This paper introduces a transient-free capacitor switching system for large motor starting on MV power distribution systems that can be used with a traditional capacitor bank system while restricting the voltage transient to less than 1.05 p.u. during capacitor switching. This solution eliminates the requirement of a MV soft starter or an auto-transformer motor start which are cost prohibitive. As a result, in lieu of a low inrush, low efficiency induction motor; a regular induction machine with higher efficiency can be applied.

The incremental efficiency improvements achieved with induction motors have been mostly accomplished by adding material to the designs of the prior efficiency level. In order to achieve levels beyond NEMA Premium (or beyond IE3), it has been recognized that a different technology must be employed. The working groups for International Electrotechnical Committee efficiency levels have stated that inverter-fed permanent-magnet motors are the likely technology to reach IE4 levels. Other motor technologies (such as synchronous reluctance) which also require inverters for operation have also been proposed for higher motor efficiency. This paper will discuss a technology which can be utilized without requiring an inverter and that can achieve beyond-IE4 levels of efficiency while using less active material in the motor. This discussion is based on testing of technology demonstration prototypes in the range of 30-250 hp. Capabilities as well as limitations of this technology will be discussed.

CFHT’s decision to move away from classical observing prompted the development of a remote observing environment aimed at producing science observations from headquarters facility in Waimea, HI. This remote observing project commonly referred to as the Observatory Automation Project (OAP ) was completed at the end of January 2011 and has been providing the majority of science data ever since. A comprehensive feasibility study was conducted to determine the options available to achieve remote operations of the observatory dome drive system. After evaluation, the best option was to upgrade the original hydraulic system to utilize variable frequency drive (VFD) technology. The project upgraded the hydraulic drive system, which initially utilized a hydraulic power unit and three (3) identical drive units to rotate the dome. The new electric drive system replaced the hydraulic power unit with electric motor controllers, and each drive unit reuses the original drive and swaps one for one the original hydraulic motors with an electric motor. The motor controllers provide status and monitoring parameters for each drive unit which convey the functionality and health of the system. This paper will discuss the design upgrades to the dome drive rotation system, as well as some benefits, control, energy savings, and monitoring.

This paper focuses on electric motor options specific to rolling element bearing totally enclosed fan-cooled (TEFC) ac induction motors. Topics such as temperature and vibration probes, space heaters, seals and sealing practices, and various other features will be explored. Understanding how these options can benefit specific motor applications can increase user satisfaction, extend motor life, reduce maintenance, and improve operating conditions.

There are currently a number of existing mega-projects as well as several new projects planned and under construction in the Athabasca Oil sands which utilize open pit mining as the method for the extraction. This technique, as opposed to SAGD (Steam Assist Gravity Drainage) and other in-situ methods, involves the handling of large quantities of the oil sand materials by conveyors, apron feeders, rotary breakers, cyclofeeders and a variety of pumps.This paper will cover the strategic importance and an overview of the oil sands, summarize the open pit mining process and associated adjustable speed drive applications with the primary focus being on the slurry and tailings handling pumps. Both slurry and tailings are of relatively high density (specific gravity) which makes the pumping of this material somewhat unique particularly to the petroleum industry. There appears to be a limited understanding even within the industry as to the requirements of this application which has led to design practices that appear to be overly conservative and costly with respect to motor and drive design and rating selections.