On Wed, 12 Jul 2017 07:41:11 -0700 (PDT), "
wrote:

On Tuesday, July 11, 2017 at 5:40:08 PM UTC-4, Dave, I can't do that wrote:


What can be done to alleviate this momentary voltage drop?

Thanks

Do you have a way to measure the current drawn by the motor? If you can measure the current ,
you can put some oil filled capacitors in parallel with the motor and find a combination that
minimises the current. -In other words correct the power factor.
This may or may not be enough to reduce the momentary voltage drop to a
level that is acceptable. But will help.

No. The run power factor, what one would be correcting with a
capacitor left in place, would make only a small dent in the start-up
draw.

The difference is the size cap required. A typical run cap for that
size motor would be 5 uF. A start capacitor is an unpolarized
electrolytic and would be in the 300 uF range.

Capacitors can be found in junk microwave ovens.

Again, no. Microwave caps look the same but are of high voltage and
low capacity. Typically 5uF at 2500-4000 volts.

No need prowling through scrap to get a cap. New ones are quite
inexpensive.

John
John DeArmond
http://www.neon-john.com
http://www.tnduction.com
Tellico Plains, Occupied TN
See website for email address