Variable-frequency drive
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Search complete. 34 mentions across 22 episodes found for "Variable-frequency drive".
Oct 28, 2026
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We are moving from a Windows application to a web-based application, which enhances security while allowing more than one person to log into the system at a time, Schaefer said.
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Instead of using Variable Frequency Drive, VFD, control to modulate its compressors, German manufacturer Bitzer has developed a new IQ Module CMRC-02 controller.
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VFD can reduce CO2 compressor capacity to about 40% of full capacity, according to Bitzer.
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However, CM-RC-02 enables Bitzer's reciprocating CO2 compressors to operate down to 10% of full capacity, according to David Little, SE Regional Sales Manager.
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Along with controlling mechanical capacity modulation, which allows opportunities to mix and match compressor capacities, the IQ module also controls head fans, liquid injection, and the crankcase heater, while monitoring conditions to support oil protection.
Brett WetzelHOST
And that goes the same way with compressors.
Brett WetzelHOST
Like when you're trying to adjust compressor cycling, you're not just going to go in there and start finger fucking the controller, trying to adjust, adjust how fast and aggressive the VFD is.
Brett WetzelHOST
And you're not going to just shorten up your dead band and increase your, a sell and decel rate in your variable speed.
Brett WetzelHOST
your digital compressor no you have to go back to basics first you have to make sure all the compress all the circuits are actually running you don't have cycling on your circuits and that everything is staying running and this could be something as simple as maybe someone was like oh it's
Brett WetzelHOST
And that goes the same way with compressors.
Brett WetzelHOST
Like when you're trying to adjust compressor cycling, you're not just going to go in there and start finger-fucking the controller trying to adjust how fast and aggressive the VFD is.
Brett WetzelHOST
And you're not going to just shorten up your dead band and increase your acel and decel rate in your variable speed.
Brett WetzelHOST
or your digital compressor no you have to go back to basics first you have to make sure all the compress all the circuits are actually running you don't have cycling on your circuits and that everything is staying running and this could be something as simple as maybe someone was like oh it's friday and i don't have enough gas so i'm just going to lower the suction Just by doing that could affect how something is running.
Brett WetzelHOST
More like, I don't know, this client wants to do flexible combiner stuff.
Brett WetzelHOST
They want to do deep dive more into CO2 diagnostic and VFDs, the normal fun stuff that everyone has a little bit of a time doing, right? They had their first class to me, I think about a year and a half ago.
Brett WetzelHOST
And so now they're smarter and now they have more in-depth questions.
Brett WetzelHOST
So, yeah.
Brett WetzelHOST
More like, I don't know, this client wants to do some flexible combiner stuff.
Brett WetzelHOST
They want to do deep dive more into CO2 diagnostic and VFDs, the normal fun stuff that everyone has a little bit of a time doing, right? They had their first class to me, I think about a year and a half ago.
Brett WetzelHOST
And so now they're smarter and now they have more in-depth questions.
Brett WetzelHOST
So, yeah.
Daniel BurkeHOST
Look at what equipment is installed and how much electronic equipment is concentrated in one place.
Daniel BurkeHOST
Note any welders, power factor correction capacitors, or VFDs.
Daniel BurkeHOST
Check for heat discoloration on electrical gear and for control or communication wiring running close to power wiring.
Daniel BurkeHOST
Confirm the condition of the grounding and whether surge protection is installed on power and data lines.
Scott ThomsenGUEST
Okay? So I'd say that's one trend.
Scott ThomsenGUEST
The other trend is that, you know, all the what I call energy conservation measures, like LED lighting, VFDs, um, you know, um, building management software systems, occupancy controls, I mean, those have all been implemented.
Scott ThomsenGUEST
And so what's left for most buildings is you either fix the envelope, or you go back to the HVAC.
Max PerilsteinHOST
Right.
Jim FiniakHOST
All right.
Jim FiniakHOST
So we've got, I guess, the building, the utilities, good handle there on VFDs.
Jim FiniakHOST
But when I think about material moving throughout a facility, I usually think of conveyors.
Jim FiniakHOST
How do they move product throughout these facilities? Is it traditional conveyance? Is it people moving carts? What are we using?
Blake SundayGUEST
So we'll set a g- a generator and a fuel tank, um, and s- and things like that.
Blake SundayGUEST
But then as far as the communication piece, that's, uh, run off of a, basically a cell service that, uh, there's a little cell, cell, cellular box that's in the VFD that, that obviously talks to the, to the internet, and, and that's how it works.
Bridgette ReadelHOST
It's g- it's more intensive than a person realizes.
Bridgette ReadelHOST
You don't just, uh, dig in a little bit of tile and walk away.
Alex DuffeyHOST
Here's what I did ahead of time.
Alex DuffeyHOST
I already have, I have a backup spindle and VFD, the controller for the spindle.
Alex DuffeyHOST
I have a backup of those.
Alex DuffeyHOST
I already swapped them out.
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