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Old 05-24-2024, 02:02 AM
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GWIZ GWIZ is offline
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Default Router speed control

A few weeks back HF discounted their Router speed controller about $17 out the door.
Rated at 8 amps that is a bit on the low side I would have liked a minimum of 15/20 amps, I have a space heater and air-fryer that pull about 12 amps.

has colored ranges
L) black, about the first 50%.
M) green, about 50-75%.
H) red, 75%-100.

Tried it with my high speed grinder 26500 rpm
tach said close to 23,000 rpm.

the low range (L) first 50% is pretty much flat 12,000 - 14,000 rpm.
above 50% pretty much works as should.

also has a belt clip.
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Old 05-24-2024, 03:31 AM
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GWIZ GWIZ is offline
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Default

I did a short test with a Transformer. added is a bridge rectifier so the output measurements are in DC
a Triac inside the control is a solid-state switch it has two states off or on, the rate that a Triac is switched ON has a varying effect.
the reading on the meters should be used as a reference being that some meters can not measure pulsed voltages very well.

my knowledge is in trouble shooting not circuit design so I don't know what long term effects it may have on a Transformer.
older welders used Triac controls and Microwave ovens.

Test transformer 2 x 18v winding's
no load
Line INPUT 119.4vac, 0.25a
control Switch at Full bypass
output 35.78 DC

No Load test
16.96 DC control knob Low
34.47 DC control knob High

3 minute Test
2 ohms Load
Load resistor temperature ~347 deg.
knob Low
11vdc
5.41amps
= 59.5 watts
AC Line amps 3.00

2 ohm Load
knob 50%
6.22a
12.64vdc
= 78.62 watts
AC Line amps 3.34a

2 ohm Load
about 2min test
Load resistor temperature ~477 deg.
knob 78%
10.22a
20.76vdc
= 212.16 watts
pic 3) AC Line amps 4.61a


Resistor closing to 500 deg I decided to end the test.
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