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(Download) "Power Amplifiers for Electrodynamic Shakers" by Wayne Tustin, Deepak Jariwala & Jaime Boscá * Book PDF Kindle ePub Free

Power Amplifiers for Electrodynamic Shakers

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eBook details

  • Title: Power Amplifiers for Electrodynamic Shakers
  • Author : Wayne Tustin, Deepak Jariwala & Jaime Boscá
  • Release Date : January 07, 2014
  • Genre: Engineering,Books,Professional & Technical,Education,
  • Pages : * pages
  • Size : 11467 KB

Description



When you visit an older vibration test lab, the shaker and power amplifier (especially if it’s an older tube type amplifier will probably draw your interest. Mostly we see solid-state power amplifiers, which recently have become much  smaller. Shaker system controls are nowadays are remote.  In this ebook, please focus on the power amplifier. Its function: to deliver sufficient alternating voltage and current (ac) to the shaker’s moving coil. Then , as discussed in ebook 15, the coil can force the shaker armature, test fixture and DUT (device under test) to move, as seen in an animation.



We don’t show nor discuss the details of the circuitry which develops the needed ac power. Your friendly shaker system supplier will be happy to furnish those details. Instead we discuss what the circuitry accomplishes.  The force developed in the armature (and thus the acceleration of the armature and load) is proportional to the alternating current which passes through the driver coil. The velocity of armature motion is proportional to the voltage applied across that coil.


 


  17.1 Focus on power amplifier


  17.2 Theory - what does the power amplifier do?


  17.3 History: motor-generator sets


  17.4 History: vacuum tubes to transistors


  17.5 Switched vs. linear power amplifiers


  17.6 Why consider early shaker systems?


  17.7 Shaker demand for current and voltage


  17.8 Wideband ratings


  17.9 Narrowband ratings


  17.10 Noise and distortion


  17.11 Effect of power amplifier distortion


  17.12 Shaker armature centering


  17.13 Need for maintenance






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