renatoa wrote:

The amazon controller is a voltage controller, by chopping the sine, as any dimmer.
It is clearly stated to be used for universal brush motors, not on brushless type (inductive) motors.

The 2000W controller is basically the same thing, as working principle.

TC4 PAC control method is the same as the two above controllers.

For both, if the Ametek motor is inductive (brushless), the behaviour should be: off until a given %, 65% in your case, 40% for others in a post some days ago, then some variation in a very narrow range (1-2%), then full on, if no load. The 65% percent level can vary when a variable load is applied.

If my above assumptions are correct, your motor is brushless, whose speed control are more complicate and sophisticated... there are many methods to do this, but none is easy, you can read more here:
https://www.elect...motor.html

However, this guy seem found the right controller, check here:
https://www.youtu...kXOy0rNZ70
...even if his explanations are contradictory... from what I found there is nothing variable frequency in that controller, is a SCR/dimmer as you already have...

Please also notice that on Ametek site the variable speed blowers are a separate section, this model could be fixed speed.

Gullygossner wrote:

This might be what you're after for controlling the blower if you're powering it via AC

https://www.tindie.com/products/bugrovs2012/pwm-2a-ac-light-dimmer-module-50hz-60hz-120v-240v/

I'm not certain with this blower but many can be powered by AC or DC power so that may be why you are seeing done folks using DC controllers. If you were to go the dc control route, you would have to feed the blower DC power as well.

renatoa wrote:

The above board is using the same control principle as those discussed above, i.e. sine chopping, aka dimmer.
I don't expect to see any change in the Ametek motor behaviour vs previous attempts.

I can suggest you another approach that worked for me, but... again, was a brushed motor ! A/C 220V, but brushed !
Setup: TC4 compiled using CONFIG_PAC2 power control mode, and RobotDyn board.
You will connect the motor on heater output, so will be controlled with an on-off sequence of full half sines, using ICC method, instead chopped sine, as is doing a normal dimmer. Or OT2 output and PAC...
Curious to hear how your motor behave powered this way.

if my above assumptions are correct, your motor is brushless, whose speed control are more complicate and sophisticated... there are many methods to do this, but none is easy, you can read more here:
https://www.electricaleasy.com/2014/0...motor.html

allenb wrote:



This motor is a brush type motor, not brushless.

renatoa wrote:

The above board is using the same control principle as those discussed above, i.e. sine chopping, aka dimmer.
I don't expect to see any change in the Ametek motor behaviour vs previous attempts.

I can suggest you another approach that worked for me, but... again, was a brushed motor ! A/C 220V, but brushed !
Setup: TC4 compiled using CONFIG_PAC2 power control mode, and RobotDyn board.
You will connect the motor on heater output, so will be controlled with an on-off sequence of full half sines, using ICC method, instead chopped sine, as is doing a normal dimmer. Or OT2 output and PAC...
Curious to hear how your motor behave powered this way.

renatoa wrote:

The blower motor was been connected to the dimmer terminals engraved LOAD (blue).
Robotdyn board is a combo consisting of a ZCD AND a SSR, on same board, no need for another SSR.

renatoa wrote:

How you connected the Random fire SSR to dimmer ? which dimmer ?

Please, can you post a sketch, I am puzzled, a dimmer output stage is same thing as a random fire SSR, so cascading them ...

If you mean RobotDyn dimmer, maybe the answer is the lack of the snubber circuit, which is missing, but probably found in the SSR. Would have been easier to add a snubber to the RobotDyn dimmer than another SSR, imo.
Are you sure the triac was been blown? a missing snubber could led to similar behaviour without actually blowing the triac. Did you tried the suposedly blown triac with a bulb as load ?

renatoa wrote:

This way make sense... should work with standard TC4 code, no change needed.

So you are using the ZCD half of the dimmer board, just for the ZC and nothing else... but the SSR command comes from TC4, not from dimmer, as I misunderstood from the post #15.

This still not explain why didn't worked with the Amazon box... maybe also missing snubber, as the dimmer board...

renatoa wrote:

You make me curious to test if a generic vacuum blower can or not be controlled by a $12 SCR voltage regulator, from Amazon/eBay/China.
Seems so... as you can see from the video I did:

renatoa wrote:

At 12 my motor stopped. 12... on display, they are unknown units, they surely aren't percents or volts.
For me is enough control range, ymmv.