The leakage reactance current is relatively small, so that the total reactive current is relatively constant compared to the kW variation over the range of motor no-load to motor full-load. Because the variation in reactive current is relatively low over the load range of the machine, a capacitor sized to compensate to a desired power factor level at full load, will maintain the power factor in the near vicinity of the desired level over the entire load range. It is important not to over-correct when sizing capacitors that are connected in parallel with the motor. The motor requires reactive power kVARs to create the magnetic flux.
Massachusetts Institute of Technology. Massachusetts Institute of Technology Date Issued: One of the reasons linear motors, a technology nearly a century old, have not been adopted for a large number of linear motion applications is that they have historically had poor efficiencies.
This has restricted the progress of linear motor development. The concept of a linear motor as a rotary motor cut and laid out flat with a conventional rotary motor control scheme as a design basis may not be the best way to design and control a high-speed linear motor.
End effects and other geometry subtleties of a linear motor make it unique, and a means of optimizing efficiency with both the motor geometry and the motor control scheme will be analyzed to create a High-Speed Linear Induction Motor LIM with a higher efficiency than what is possible with conventional motors and controls.
Mathematical models for the prediction of effects that are peculiar to DSLIM are formulated, and their overall effects on the performance of the proposed machine are analyzed.
These effects are used to generate a transient motor model, which is then driven by a motor controller that is specifically designed to the characteristics of the proposed DSLIM. Due to this DSLIM's role as a linear accelerator, the overall efficiency of the DSLIM will be judged by the kinetic energy of the launched projectile versus the total electric energy that the machine consumes.This course introduces the principles of animation through a variety of animation techniques.
Topics include motion research and analysis, effective timing, spacing, volume control, stagecraft, and .
helsinki university of technology Faculty of Electronics, Communications and Automation Juhamatti Nikander Induction Motor Parameter Identi cation in Elevator Drive Modernization Thesis submitted for examination for the degree of Master of Science in Technology Espoo Title Authors Published Abstract Publication Details; Easy Email Encryption with Easy Key Management John S.
Koh, Steven M.
Bellovin, Jason Nieh. Variable Speed Pump Selection - Parts 1 - 3 This tutorial takes a different approach to pump selection for VFD operation.
Part 1 addresses constant pressure / variable flow while Part 2 addresses variable pressure / variable flow. Rex Research was established in by Robert A.
Nelson to archive and distribute " InFolios " -- Information Folios -- of collected Articles about suppressed, dormant, or emerging Sciences, Technologies, Inventions, Theories, Therapies, & other Alternatives that offer real Hope & Choices to help Liberate Humanity from its Stupidity and the evile Pornocracy of Psychopaths.
Jan 31, · Is a hub motor the right choice for your electric vehicle? Answer these few simple ques I mean, read these few pointers which highlights some design tradeoffs and considerations involved in the use of hub motors!