using 120V drill on 240V.. Howwww??

ian field

Joined Oct 27, 2012
6,536
You would loose the variable speed via the triac.
Max.
Only if you include a reservoir electrolytic - but that would be even worse as it charged up to the peak voltage (about 320V in the case of 230V mains) otherwise you still get zero crossing (of sorts).

A half wave diode will halve the average power in a purely resistive load, but won't do anything to protect downstream semiconductors from excessive peak voltage.
 

MaxHeadRoom

Joined Jul 18, 2013
28,619
Only if you include a reservoir electrolytic - but that would be even worse as it charged up to the peak voltage (about 320V in the case of 230V mains) otherwise you still get zero crossing (of sorts).
That was the correction I intended, IOW adding a cap would prevent the phase angle control.
When I posted#19 and Inwo caught it, I realized my error, in fact I had just built a similar set up for a Foam cutter I made, but DC full wave control. :rolleyes:
Max.
 
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