Guess how many Amps this 220 VAC HVAC motor draws at 110 VAC?

Guess how many marbles one could stuff into your empty rock hard noggin? Bubba

Incorrect.

My previous post as follow:

DIMMER MUST BE WITH TRIACS OUTPUT Also for those that don't understand this it is "ONLY" with 115VAC and 220vac/1/60 motors Dido

Should be less than 4 Amps .

???????: snipped-for-privacy@b28g2000cwb.googlegroups.com...

Whoever wrote this thanks for the common sense and your input .

Did you measure the current at 110 VAC?

Dido,

From my experience triacs do not work well with induction motors... they will work with commutated (brush) motors... but they are highly inefficient and tend to burn brushes at an alarming rate.

The whole crux of this is that AC induction motors cannot be speed controlled through lowering the the supply voltage... it simply will not work.

While triacs are not lowering voltage (in effect they are very cheap frequency chopper designs), false triggering is very likely.... as well as...

Some fan applications may use triacs for speed control from 80-100 percent of rated RPM... but if you go much lower the slip is so high the motor rapidly overheats... as has already been discussed here.

IGBT and SSR power supply designs may be a better choice... although more expensive.

Jake

Jake Please I said on shaded pole and multi tap winning with capacitor run motors I did not say anything about DC or brush driving motors. And triacs do not work well with any motors you right but are used and they do work on AC systems. On DC systems you would be using SCR instead. Back to triacs I do know that some companies actually use triacs to power up,up to 2 HP refrigeration compressors and on some systems they may be parallel 2x2 HP on one triac. there are some solid state relays that could also be use as dimmers by external use of controlled source AC or DC depend on relay it self and OEM design. some slid state relays use triacs and some use SCR (Silicon Control Rectifiers) these rectifiers are hookup back to back in package so that can pass full AC sine wave, the single-one passes only one half of sine wave and are usable only on DC.

I woulda guessed more like 715.

Actually, it's the supposed former phone number of the daughter of the Erie County Sheriff.

"AKS" wrote

Ya , okay, Dildo, wait a minute while we all run and get our notebooks so we can write down what you say....LOL

Sorry incorrect wording it will be hook up in parallel with output tied together positive and negative in and out. both SCRs will get power at same time one will be fed on positive side and one on negative side in this configuration AC is available however it will not be true RMS but good enough that power can be variable Dido

A full wave bridge rectifier using SCRs is used to provide variable DC voltage to DC motors. Example: Reliance Max Pak Plus drives. they can be 1.

I am Stu mied. Bob