6 pages matching constant frequency in this book
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Theory of the magnetic suspension 12
Electrostatic driving arrangements 20
3 other sections not shown
amplifier anti-node applied attainable capacity controlled suspension cm disc cm long coils condenser connected constant frequency cycles per sec decrease diameter diso driving plates driving torque Duralumin eddy currents electrostatic drive electrostatic motor electrostatic suspension equilibrium with respect filament free deceleration measurements frequenoy frictional torque gas pressure glass surrounding grid bias high speeds high vacuum Hysteresis iron rod iron tube mode of vibration motionless motors for high oscillations per/sec phase difference photoelectrically controlled suspension pick-up frequency pick-up plate positive than average rate of acceleration rate of free restoring force rev/sec rev/sec/hr revolutions rotating magnetic field rotating system rotor moves rotor shown rotor was driven sense shown set of plates sewing needle shown in Fig simple harmonic motion Sinoe solenoid current stable equilibrium striking the photocell stroboscope disc surrounding the rotor suspended rotor synchronism UNIVERSITY OF VIRGINIA vacuum system vertical displacement vib/sec vibration point voltage developed volts whioh