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An Investigation of Explosion-Proof Motors

Description: Procedure of Investigation: "The investigation described in this bulletin was undertaken by the Bureau of Mines as one of several investigations having for their purpose the ascertaining of methods for lessening the risks attending the use of electricity in mining. In this report the results of tests are related to the various types of protection employed which are described in detail."
Date: 1912
Creator: Clark, H. H.
Partner: UNT Libraries Government Documents Department

Flight Performance of a 2.8 KS 8100 Cajun Solid-Propellant Rocket Motor

Description: "The performance of a 2.8 KS 8100 Cajun solid-propellant rocket motor has been determined from the free-flight test of a single-stage model which reached a velocity of 5,268 feet per second (Mach number, 4.74). Thrust data from the flight test are compared with data obtained from a ground firing test made by the manufacturer and the two are shown to be in agreement." Report presenting general drag, data, and acceleration are also provided.
Date: January 21, 1957
Creator: Lee, Dorothy B.
Partner: UNT Libraries Government Documents Department

Investigation of vanes immersed in the jet of a solid-fuel rocket motor

Description: Report presenting a determination of the characteristics of a particular vane configuration in the jet of a 6.25-inch Deacon solid-fuel rocket motor from static testing. The vanes were oscillated during the test to provide comprehensive data over a range of deflection angles. The effects of the rocket jet on two vane materials, the aerodynamic characteristics of the vanes, and the influence of jet vanes on rocket-motor performance were determined.
Date: September 10, 1952
Creator: Giladett, Leo V. & Wineman, Andrew R.
Partner: UNT Libraries Government Documents Department

An impulse electric motor for driving recording instruments

Description: The chief purpose in undertaking the development of this synchronous motor was the creation of a very small, compact power source, capable of driving the film drums of the recording aircraft instruments designed by the staff of the National Advisory Committee for Aeronautics.
Date: September 1923
Creator: Joachim, W. F.
Partner: UNT Libraries Government Documents Department

The Design of a Miniature Solid-Propellant Rocket

Description: "A miniature rocket motor was designed and developed to produce 3 ounces of thrust for a duration of 2 seconds. The rocket is simply designed, safe to operate, easily handled, and gives reproducible performance. Standard solid-propellant-rocket design techniques were found to be not wholly applicable to the design of miniature rockets because of excessive heat losses" (p. 1).
Date: March 1956
Creator: Heitkotter, Robert H.
Partner: UNT Libraries Government Documents Department

Flight Investigation of Nine Reduced-Scale (1:3.75) Hermes A-2S Rocket-Motor Test Vehicles

Description: Tests were made to determine the motor performance characteristics under flight conditions at propellant preignition temperatures of -25 degrees F, ambient temperature, and 130 degrees F. Results regarding the trajectories of the various test vehicles, time histories of velocity and Mach number, acceleration time histories, thrust curves, and maximum variation of total impulse are provided.
Date: September 16, 1953
Creator: Falanga, Ralph A.
Partner: UNT Libraries Government Documents Department

The 300 H.P. Benz Aircraft Engine

Description: This report provides a description of the Benz 300 H.P. aircraft engine containing 12 cylinders placed at a 60° angle. It includes a detailed description of the development of the constructional points, particularly the cylinders, pistons, and connecting rods, as well as the engine fitting, lubrication, oil pumps, bearings, oil tank, fuel pump, carburetors, and cooling system. There are seven pages of illustrative figures at the end of the report.
Date: January 1921
Creator: Heller, A.
Partner: UNT Libraries Government Documents Department

Design and Evaluation of a Turbojet Exhaust Simulator, Utilizing a Solid-Propellant Rocket Motor, for Use in Free-Flight Aerodynamic Research Models

Description: A method has been developed for modifying a rocket motor so that its exhaust characteristics simulate those of a turbojet engine. The analysis necessary to the design is presented along with tests from which the designs are evaluated. Simulation was found to be best if the exhaust characteristics to be duplicated were those of a turbojet engine at high altitudes and with the afterburner operative.
Date: December 17, 1954
Creator: de Moraes, Carlos A.; Hagginbothom, William K., Jr. & Falanga, Ralph A.
Partner: UNT Libraries Government Documents Department

Advanced Motors

Description: Project Summary Transportation energy usage is predicted to increase substantially by 2020. Hybrid vehicles and fuel cell powered vehicles are destined to become more prominent as fuel prices rise with the demand. Hybrid and fuel cell vehicle platforms are both dependent on high performance electric motors. Electric motors for transportation duty will require sizeable low-speed torque to accelerate the vehicle. As motor speed increases, the torque requirement decreases which results in a nearly constant power motor output. Interior permanent magnet synchronous motors (IPMSM) are well suited for this duty. , , These rotor geometries are configured in straight lines and semi circular arc shapes. These designs are of limited configurations because of the lack of availability of permanent magnets of any other shapes at present. We propose to fabricate rotors via a novel processing approach where we start with magnet powders and compact them into a net shape rotor in a single step. Using this approach, widely different rotor designs can be implemented for efficiency. The current limitation on magnet shape and thickness will be eliminated. This is accomplished by co-filling magnet and soft iron powders at specified locations in intricate shapes using specially designed dies and automatic powder filling station. The process fundamentals for accomplishing occurred under a previous Applied Technology Program titled, “Motors and Generators for the 21st Century”. New efficient motor designs that are not currently possible (or cost prohibitive) can be accomplished by this approach. Such an approach to motor fabrication opens up a new dimension in motor design. Feasibility Results We were able to optimize a IPMSM rotor to take advantage of the powder co-filling and DMC compaction processing methods. The minimum low speed torque requirement of 5 N-m can be met through an optimized design with magnet material having a Br capability of 0.2 ...
Date: December 14, 2012
Creator: Knoth, Edward A.; Chelluri, Bhanumathi & Schumaker, Edward J.
Partner: UNT Libraries Government Documents Department

Report on the feasibility study for improving electric motor service centers in Ghana

Description: On March 3 and 4, 1998, a visit was made to Oak Ridge National Laboratory (ORNL) by two officials from Ghana: Mr. I.K. Mintah, Acting Executive Director, Technical Wing, Ministry of Mines and Energy (MOME) and Dr. A.K. Ofosu-Ahenkorah, Coordinator, Energy Efficiency and Conservation Program, MOME. As a result of this visit, Dr. John S. Hsu of ORNL was invited by MOME to visit the Republic of Ghana in order to study the feasibility of improving electric motor service centers in Ghana.
Date: December 10, 1999
Creator: Hsu, J.S.; Jallouk, P.A. & Staunton, R.H.
Partner: UNT Libraries Government Documents Department

Development of Ultra-Efficient Electric Motors Final Technical Report Covering work from April 2002 through September 2007

Description: High temperature superconducting (HTS) motors offer the potential for dramatic volume and loss reduction compared to conventional, high horspower, industrial motors. This report is the final report on the results of eight research tasks that address some of the issues related to HTS motor development that affect motor efficiency, cost, and reliability.
Date: May 30, 2008
Creator: Schiferl, Rich
Partner: UNT Libraries Government Documents Department

The Role of Reluctance in PM Motors

Description: The international research community has lately focused efforts on interior permanent magnet (IPM) motors to produce a traction motor for hybrid electric vehicles (HEV). One of the beneficial features of this technology is the additional torque produced by reluctance. The objective of this report is to analytically describe the role that reluctance plays in permanent magnet (PM) motors, to explore ways to increase reluctance torque without sacrificing the torque produced by the PMs, and to compare three IPM configurations with respect to torque, power, amount of magnet material required (cost), and percentage of reluctance torque. Results of this study will be used to determine future research directions in utilizing reluctance to obtain maximum torque and power while using a minimum amount of magnet material.
Date: June 16, 2005
Creator: Otaduy, P.J.
Partner: UNT Libraries Government Documents Department

Microhole Smart Steering and Logging While Drilling System

Description: A background to Coiled Tubing Bottom Hole Assemblies (CT-BHA) is given, and the development of a resistivity measurement component, and a rib-steering motor component, is described. The successful operation of these components in both the laboratory and field environment is described. The primary conclusion of this development is that both components operate as anticipated within the CT-BHA, and significantly extend the possibility of drilling with coiled tubing in the microhole environment.
Date: June 30, 2006
Creator: Macpherson, John; Moeller, Mathias; Gregg, Thomas & Chemali, Roland
Partner: UNT Libraries Government Documents Department

Testing of the Semikron Validation AIPM Unit at Oak Ridge National Laboratory: January 2005

Description: This report documents the electrical tests performed on the Semikron high-voltage automotive integrated power module (AIPM) at the Oak Ridge National Laboratory (ORNL). Testing was performed with an inductive/resistive load and with a motor load at the National Transportation Research Center (NTRC) during the second quarter of FY 2005.
Date: March 24, 2005
Creator: Nelson, S.C.
Partner: UNT Libraries Government Documents Department

Note on some observed effects of rocket motor operation on the base pressures of bodies in free light

Description: Some measurements of the effects of rocket-motor operation on base pressure were obtained incidental to other research on some bodies in free flight. These data are presented and qualitatively analyzed. The analysis indicates that jet effects on drag are of sufficient importance to deserve consideration in the design of jet motor nozzles, especially for aircraft and missiles where the thrust and drag are of the same order of magnitude. The base-pressure changes induced by the jet should be considered in the structural design of the outer body skin on the aft portion of fuselages containing jets. (author).
Date: November 16, 1950
Creator: Purser, Paul E.; Thibodaux, Joseph G. & Jackson, H. Herbert
Partner: UNT Libraries Government Documents Department

Cost Effective, High Efficiency Integrated Systems Approach to Auxilliary Electric Motors

Description: The CARAT program, carried out by Kinetic Art & Technology Corporation (KAT), has been one of the most commercially successful KAT R&D programs to date. Based on previous development of its technology, KAT designed, constructed and tested a highly efficient motor and controller system under this CARAT program with supplemental commercial funding. Throughout this CARAT effort, the technical objectives have been refined and refocused. Some objectives have been greatly expanded, while others have been minimized. The determining factor in all decisions to refocus the objectives was the commercial need, primarily the needs of KAT manufacturing partners. Several companies are employing the resulting CARAT motor and controller designs in prototypes for commercial products. Two of these companies have committed to providing cost share in order to facilitate the development. One of these companies is a major manufacturing company developing a revolutionary new family of products requiring the ultra-high system efficiency achievable by the KAT motor and controller technologies (known as Segmented ElectroMagnetic Array, or SEMA technology). Another company requires the high efficiency, quiet operation, and control characteristics afforded by the same basic motor and controller for an advanced air filtration product. The combined annual production requirement projected by these two companies exceeds one million units by 2005.
Date: September 26, 2003
Creator: Jr., Roy Kessinger; Seymour, Keith; Angal, Kanchan; Wolf, Jason; Brewer, Steve & Schrank, Leonard
Partner: UNT Libraries Government Documents Department

Perceptual basis for reactive teleoperation.

Description: To enhance task performance in partially structured environment, enhancement of teleoperation was proposed by introducing autonomous behaviors. Such autonomy is implemented based on reactive robotic architecture, where reactive motor agents that directly couples sensory inputs and motor actions become the building blocks. To this end, presented in this paper is a perceptual basis for the motor agents. The perceptual basis consists of perceptual agents that extracts environmental information from a structured light vision system and provide action oriented perception for the corresponding motor agents. Rather than performing general scene reconstruction, a perceptual agent directly provides the motion reference for the motor behavior. Various sensory mechanisms--sensor fission, fusion, and fashion--becomes basic building blocks of the perception process. Since perception is a process deeply intertwined with the motor actions, active perception may also incorporate motor behaviors as an integral perceptual process.
Date: August 28, 2001
Creator: Park, Y. S.; Ewing, T. F.; Boyle, J. M. & Yule, T. J.
Partner: UNT Libraries Government Documents Department

Linear-motor drives for machine tools

Description: Conventional techniques to position moving platforms on precision machines have relied heavily on mechanical drives such as the ball-nut/lead-screw system. Unfortunately, as positioning tolerances become more and more demanding, the cyclic errors-inherent even in precision gear drives-contribute an excessive amount of positioning uncertainty. The linear-motor drive system is one approach to provide a smooth, accurate, vibration-free method for locating a moving platform. Some existing uses of linear motors in industry as well as potential future applications on precision machines are discussed.
Date: December 31, 1979
Creator: Barkman, W.E.
Partner: UNT Libraries Government Documents Department