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CONTROLLER FOR AN ELECTROMAGNETIC DRIVER AND SUB-HARMONIC CONTROLLER FOR AN ELECTROMAGNETIC VIBRATOR AND SUB-HARMONIC CONTROLLER FOR AN ELECTROMAGNETIC DOUBLE-COIL VIBRATOR
CONTROLLER FOR AN ELECTROMAGNETIC DRIVER AND SUB-HARMONIC CONTROLLER FOR AN ELECTROMAGNETIC VIBRATOR AND SUB-HARMONIC CONTROLLER FOR AN ELECTROMAGNETIC DOUBLE-COIL VIBRATOR
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机译:电磁驱动器的控制器和电磁振动器的次谐波控制器,以及电磁双线圈振动器的次谐波控制器
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摘要
A subharmonic controller for a dual coil electromagnetic vibrator, which derives both power and timing from a conventional a.c. line, having a zero crossing detector providing pulses at twice line frequency to a phase control. The phase control provides a selectively variable pulse width and triggers a frequency divider, which in turn triggers a divide-by-two-counter. Pulses from each of the phase control, divider and counter are fed to a logic controller which generates plus and minus gate signals. The gate signals alternately fire a pair of oppositely-directed SCR's, each SCR connected in series with one of the dual coils across the a.c. line. A polarity detector and reset circuit restore the polarity information and synchronize it with the direction of conduction of the SCR's.
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