Calculating Three Phase Power for an Asynchronous Motor-Generator

AI Thread Summary
The discussion focuses on measuring three-phase power in an asynchronous motor-generator, specifically addressing the power readings from Phase 1 and Phase 3. The positive power reading for Phase 1 and the negative reading for Phase 3 may be attributed to a high power factor (cos φ). To calculate the power for the second phase (L2), it is noted that each phase contributes one-third of the total power. Understanding these dynamics is crucial for accurate power measurement and analysis in three-phase systems. Accurate calculations ensure efficient operation of the motor-generator setup.
jimmynora
Messages
6
Reaction score
0
Hi

We are measuring 3 Phase Power of an asynchronous Motor-Generator and have equipment installed on Phase 1 (L1) and Phase 3 (L3) to measure the current/voltage/power. I have some questions regarding the results.

Q) Why is the Power of Phase 1 positive and Phase 3 Negative ?

Q) How can I calculate the power of the second phase (L2) from these results?



Thanks
JN
 
Engineering news on Phys.org
1) Because you probably have an high cos \phi
2) Each phase has 1/3 of the total power.
 

Thread 'Underwater piezoelectric sensor array receive sensitivity'

Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
View full post »

Thread 'Following up on the recent thread about Earth Resistance measurements'

I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
View full post »
Thread 'Beauty of old electrical and measuring things, etc.'

Thread 'Beauty of old electrical and measuring things, etc.'

Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old things that I keep and now reviving. Old things need to work to see the beauty. Here's what I've done so far. Two views of the gadgets shelves and my small work space: Here's a close up look at the meters, gauges and other measuring things: This is what I think of as surface-mount electrical components and wiring. The components are very old and shows how...
View full post »

Similar threads

Current of delta 3 phase balanced power
Replies
4
Views
1K
What does the 'power' vs 'time' graph look like for a 3 phase AC supply?
Replies
13
Views
4K
Self excited induction generators and grid connected solar inverters?
Replies
9
Views
2K
A little help understanding 3 phase waveforms and summation
Replies
5
Views
2K
Metering a Single Phase 208 VAC Circuit
2
Replies
77
Views
8K
3 Phase Harmonics and Solid State Relay Issues
Replies
26
Views
3K
How are coils arranged in a power station generator?
Replies
8
Views
4K
Induction motor windings, number of turns per phase and per pole
Replies
2
Views
4K
What is the correct method for counting poles in a 3-phase induction motor?
Replies
4
Views
3K
What Could Be Causing My 3 Phase Motor to Lack Power and Torque?
Replies
23
Views
6K

Hot Threads

Recent Insights

Back
Top