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Session 1133

Experiments with Electrical Motors in Distance Learning Environment: Operating Lab-Volt Electro-Mechanical System Using Web-Based Tools From National Instruments Ilya Grinberg, Ronald C. Matusiak Buffalo State College

Abstract Recent years gave a significant boost to distance learning (on-line) educational delivery. However, laboratory component was represented by simulation or remote operation of either static or small-size dynamic devices1, 2. Few advances have been made in remote control and monitoring of large dynamic electro-mechanical systems, such as electric motors and/or drives. This paper concentrates on remote control of a group of electro-mechanical devices (variable power supply, electric motor, dynamometer, and instrumentation) integrated in one complex as well as visualization of their control parameters (such as voltage, speed, torque, current, and power). The paper also discusses log-on security procedures, hardware and software development, video streaming to ensure quality video and sound, and teaching methodologies to provide successful laboratory delivery.

Hardware For electromechanical part of the project it was decided to utilize existing laboratory equipment used in the Technology department of Buffalo State College. It includes Lab-Volt Electromecanical System (EMS) with data acquisition interface (9061-00 or 9062-00) and digital dynamometer (8960-10). Motor load is any available motor, chosen from squirrel cage induction motor (EMS 8221), wound induction motor (EMS 8231), synchronous machine (EMS 8241) or any other available motor. Power supply/variac (EMS 8821) was modified to allow for remote access.3 In order to provide convenient transition from local to remote control and vice-a versa, a motor starter panel was developed. The Data Acquisition Interface (DAI) consists of isolation and data acquisition units. The isolation unit converts high-level voltages and currents found in electric power systems and power electronics circuits into low-level signals, and routes these signals to the data acquisition unit. The data acquisition unit converts the low-level signals into digital numbers (data) that are sent to the personal computer that runs the LVDAM-EMS software4. Data acquisition interface (DAI) is a part of Lab-Volt EMS system and provides interface between electromechanical equipment and data acquisition card provided by Lab-Volt. This card is incompatible with NI series of cards. Software supplied with EMS provides excellent graphic user interface but allows only one local user to operate and/or observe an experiment (a group of students can observe results on one monitor).

Proceedings of the 2004 American Society for Engineering Education Annual Conference & Exposition Copyright © 2004, American Society of Engineering Education

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Grinberg, I. (2004, June), Experiments With Electrical Motors In Distance Learning Environments: Operating Lab Volt Electro Mechanical System Using Web Based Tools From National Instruments Paper presented at 2004 Annual Conference, Salt Lake City, Utah. 10.18260/1-2--12733