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  • EPACT & Energy Efficient Electric Motors
    Today is truly an exciting and challenging time for specifiers, buyers, users and manufacturers of industrial electric motors. It is a time of change in the motor industry rivaled, in recent times, only by the introduction of re-rated "T" frame motors in the 1960s. But there is a difference between
  • Electric Motor Testing-The New Kid on the PdM Block
    While vibration analysis and infrared thermography. have been widely used for years as part of predictive. maintenance programs, Electric Motor Testing (EMT) is. a relative newcomer to condition monitoring. In reality. though, the tests utilized by modern EMT systems have. been around for years
  • Spring Return Electric Actuators Meet Fire Standards for Tunnels
    such a fire inside the structure, electric motor operated dampers in the ventilation system can act to suppress spreading of the fire as well as to clear smoke from the structure. Most motorized actuators that operate these dampers are required to be "failsafe", where they are equipped
  • Cowern Papers: Motor Basics
    . Efficiency is the percentage of the input power that is actually converted to work. output from the motor shaft. Efficiency is stamped on the nameplate of most. domestically-produced electric motors. FRAME SIZE. Motors, like suits of clothes, shoes and hats, come in various sizes to match the. requirements
  • How to select an Actuator (part. 3): Electric Actuator
    Electric rotary actuators are basically geared motors with a variety of electrical accessories (limit switches, heater, circuit boards) that may be specified to meet the exact valve automation requirements of a process control system. As an electrical device it is housed in an enclosure designed
  • Does This NEMA Rating Match Your Required IP Rating?
    , fuses, isolation transformers, etc. Two widely accepted rating systems are the NEMA and the IP codes. NEMA, short for National Electric Manufacturers' Association, is commonly specified at installations in the U.S.A. IP, which is an abbreviation for International Protection, is derived from the IEC
  • Improving Motor Reliability Through Static and Dynamic Testing (.pdf)
    Static motor testing is a well-known means to comprehensively test electric motors. However, if a motor cannot be shutdown even the best static equipment becomes ineffective. Situations like these have fueled the popularity of dynamic testing. But can dynamic testing be productive? One way
  • Medical Device Link . Advances in Motor Technology for the Medical Industry
    are already available, and the future promises further developments in such areas as micromotors and closed-loop microprocessor controls. BIBLIOGRAPHY Clifford M, Electric/Electronic Motor Data Handbook, Englewood Cliffs, NJ, Prentice-Hall, 1990. Hanselman D, Brushless Permanent-Magnet Motor Design

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