Hoist brake solenoid buzzes/fluckers instead of steadily pulling
"Michael A. Terrell" fired this volley in
:
Sigh. As usual, Maynard (AKA: jamie) misses the point. It takes
more
than a diode in series to convert an AC solenoid into a DC solenoid.
You also need a filter capacitor or you are trying to operate it on a
half cycle of the AC waveform, giving you 230 * .707 or 162.61 volts
which is 50% of the power of a full cycle. With the filter capacitor
you get 230 * 1.414 or 325.22 DC
Michael, it's even less than that: Full-wave single-phase rectified AC
has an area under the curve of .707*Vpeak. Half-wave has half THAT area.
If you filter half-wave, and draw no current from the cap, it charges to
peak V-in.
Filtered - either half-wave or full-wave - the DC voltage never rises
above peak, regardless of draw, unless you use a doubler circuit. A
full-wave rectifier (with or without filtering) is not a doubler.
Lloyd
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