Quantcast Speed of Single-Phase Induction Motors

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
4-15 Figure 4-13.—Shaded poles as used in shaded-pole ac induction motors. The motion of the field back and forth between shaded and unshaded portions produces a weak torque to start the motor. Because of the weak starting torque, shaded-pole motors are built only in small sizes. They drive such devices as fans, clocks, blowers, and electric razors. Q13. Why are shaded-pole motors used to drive only very small devices? Speed of Single-Phase Induction Motors The speed of induction motors is dependent on motor design. The synchronous speed (the speed at which the stator field rotates) is determined by the frequency of the input ac power and the number of poles in the stator. The greater the number of poles, the slower the synchronous speed. The higher the frequency of applied voltage, the higher the synchronous speed. Remember, however, that neither frequency nor number of poles are variables. They are both fixed by the manufacturer. The relationship between poles, frequency, and synchronous speed is as follows: where n is the synchronous speed in rpm, f is the frequency of applied voltage in hertz, and p is the number of poles in the stator. Let’s use an example of a 4-pole motor, built to operate on 60 hertz. The synchronous speed is determined as follows:


Electrical News
Boeing, SpaceX Take US Back to Space Station
NASA taps Boeing Co., the safe but expensive choice, and...
eetimes.com
Technology You Can Sink Your Teeth Into
Thanks to 3D imaging software and a special milling machine,...
eetimes.com
Does Reducing Power Consumption Actually Save Energy?
It's the law of unintended consequences again, as regulations to...
eetimes.com
Local Motors Succeeds in Test Driving First 3D-Printed Car
3D-printed car has successful test drive!...
eetimes.com
Designer of Things Keynote Speaker: Gadi Amit
EETimes is pleased to announce that Gadi Amit will be...
eetimes.com
Sensor Hubs Aided by IEEE-2700-2014 Datasheets
The first MEMS standard, the IEEE 2700-2014, will standardize data...
eetimes.com
Dr. Duino Diagnostic Shield Deduces Dilemmas in Arduino Shield Stacks
When sandwiched an Arduino Uno and a shield -- or...
eetimes.com
Asia-Pacific IC Usage Domination Growing
Asia-Pacific is the dominant market for ICs for most products...
eetimes.com
Open-Source Hardware Circa 1920
An engineer discovers amazing schematics and documentation pasted to the...
eetimes.com
Intel Core M vs. Pentium M
A comparison of the Intel's recent Core M to its...
eetimes.com
WENS 540 Handheld 10MHz Oscilloscope and Debug Meter
A very brief look at the new WENS 540 Debug...
eevblog.com
Consumers Expect Full In-Car Connectivity
Drivers worldwide increasingly expect their cars to be "the next...
eetimes.com
iPhone 6 Future Revealed
Apple's new bigger iPhone 6 and 6 Plus are not...
eetimes.com
Lemoptix Pico-Projector Excels
Lemoptix is licensing its pico-projector technology to companies like Hamamatsu...
eetimes.com
The Importance of Design in Solving Real Problems
Product design is more important now than ever, thanks to...
eetimes.com
Technology That Knows Who You Are: The Nymi Wristband
The Nymi is a wristband that uses your cardiac rhythm...
eetimes.com
Orbis & Dr. Duino: A Tale of Maker Happiness
While creating an Arduino-based art project, Guido Bonelli realized there...
eetimes.com
ATPG: It's What's Inside the Simulation That Counts
Cell-aware testing can improve test coverage in simulations, but there...
eetimes.com
Android One Rides Mediatek
Taiwan's leading mobile chip vendor will power Google's Android One-branded,...
eetimes.com
Micron SSD Allows MLC to Mimic SLC
New 128nm lithography enables Micron to offer dynamic write acceleration,...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +