aaahhh , the fog of ignorance begins to lift... you see I'm using a 3450 RPM rated motor, and I'm varying it from 300RPM up to 2000RPM. so I'm on the left side of that graph's peak while you were on the right. I was out of the range of 'normal operation'. Which would explain why things are all...
jraef: I was hoping to get power delivered , and I just needed a ballpark number. Since this is a one off thing , I had hoped not to pick up a multimeter with power factor. Also efficiency is just a guess at best. I did plug my power supply into a scope and according to my labview software its...
Hi Guys,
I have set up a test rig in which I use a power supply to vary the Voltage and Frequency to a 3.73KW AC motor. I am also able to measure the shaft RPM using a tachometer. I just need to know of a way to calculate the power based on this info.
Background:
I just needed to get the...
hmm , i'm afraid i couldn't figure that out , I've played around with it a little but no luck . if push comes to shove you can always contact the mathworks support team .... answers seem to be few and far between in this simulink forum for some reason :(
Okay , i assume you're already aqcuiring this signal okay. So I'd go to the library browser , under simulink\sinks you will find the "to workspace block". Wire your signal to this block . Change block settings to output a vector. The block stores this vector in the workspace called simout (you...
I love this forum , you guys are amazing... In case anyone is intersted , this is what I ended up doing :
I just stayed with the power supply i had in the mean time , then i calibrated the amplifier using a much more accurate digital multimeter than I'll be using for the application. So pretty...
thanks for the info , its for a DC signal i'm trying to amplify coming from a shunt resistor. I guess sometimes you want to pull your hair out when you can't explain away that extra bit of noise, especially if you're mechanical trying to learn this stuff . I also think , after looking at Power...
I am trying to amplify a signal from in the range of (0.5mV-5mV) by a factor of 10 using TL082 op amp with non-inverting configuration for instrumentation but my power supply is not exactly the same . I.e +15.3V and -14.8V instead of +/- 15V. When i used Multisim it told me this would make a...
KiWiMAce
The LPS is in air handler plenum , introducing steam into the supply air duct . Just thinking of taking the whole system out and replacing it.
Oh , the Lieberts are not in the same space as the LPS , I kinda forgot about that , they are in their own room .
Good link by the way.
I'm involved in a project to expand the humidification in a data center , currently using low pressure steam from a pair of 102hp gas boilers.
I was thinking of recommending Ultrasonic humidifiers for the new ones and even replacing the whole thing with just ultrasonic , because the existing...
hey guys , thanks for the helpful tips .
Willard & Cpthk , your experience is amazing and i'm even moe encouraged because the guys who do maintanance on this building also maintain an attached data center , so are dilligent by nature , maintance will be done on time.
ChasBean , you ARE the man...
I have some really old outside air dampers in office buildings . Maybe 15% leakge or so when fully closed.
I'm looking to go to low-leak dampers or else just go cheap and add some blade and edge seals on the current ones.
My question is this , has anyone out there had any experience with...
Okay guys , I've been looking at this option for a 13 story office building in the Midwest .The current system is VAV , with VFD (VSD's on all air handlers) , also use some economizer , but minimum outside air on some floors is set for max load , when floors are currently only 30%- 40% full...
