Presentation
ELEC 273 |LAB EXAM TIPS EXPERIMENT 5 |AC POWER MEASUREMENTS| CONCORDIA UNIVERSITY
- Module
- Institution
ELEC 273 |LAB EXAM TIPS EXPERIMENT 5 |AC POWER MEASUREMENTS| CONCORDIA UNIVERSITY
[Show more]
Seller
Follow
smartzone
Reviews received
Content preview
ELEC 273 LAB EXAM TIPS EXPERIMENT 5 AC POWERMEASUREMENTS CONCORDIA UNIVERSITY
, OBJECTIVES:
1- To measure AC Power on Resistive, Inductive and Capacitive
Loads 2- The Power-Factor-Correction of an Inductive Load
INTRODUCTION:
AC power absorbed by a load is expressed by the following equation:
P(t) = V(t) i(t)
The instantaneous power is the rate at which an element (load) absorbs energy. A load is
composed of dissipative and reactive elements, and as a result, it can be expressed by an
impedance Z = R +jX = |Z|∟θ .˚
Working in the time domain, if the voltage and current associated with the load
are: v(t) = Vp cos (t + v ) and i(t) = Ip cos(t + i)
where Vp and Ip are peak values and v and i are phase angles, then:
p(t) = VpIp cos (t + v) cos(t + i) = (VpIp/2) cos(v - i) + (VpIp/2) cos(2t +v + i).
The difference between the voltage phase angle and current phase angle, in the time
domain, is actually the angle of the impedance Z in the phasor domain. By expressing the
voltage and current in their RMS values, p(t) can be re-written as:
p(t) = VI cos θ + VI cos (2t + θ) = P + VI cos (2t + θ)
Vp Ip
where the RMS values of the voltage and current are : V
= √2 and I = √2
and where (v - i) = θ and P = VI cos θ.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller smartzone. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.88. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81113 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now