Quantcast Split-Phase Induction Motors

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
4-12 Figure 4-10.—Rotor currents in a single-phase ac induction motor. Now, if the rotor is rotated by some outside force (a twist of your hand, or something), the push-pull along the line in figure 4-10, view A, is disturbed. Look at the fields as shown in figure 4-10, view B. At this instant the south pole on the rotor is being attracted by the left-hand pole. The north rotor pole is being attracted to the right-hand pole. All of this is a result of the rotor being rotated 90º by the outside force. The pull that now exists between the two fields becomes a rotary force, turning the rotor toward magnetic correspondence with the stator. Because the two fields continuously alternate, they will never actually line up, and the rotor will continue to turn once started. It remains for us to learn practical methods of getting the rotor to start. There are several types of single-phase induction motors in use today. Basically they are identical except for the means of starting. In this chapter we will discuss the split-phase and shaded-pole motors; so named because of the methods employed to get them started. Once they are up to operating speed, all single-phase induction motors operate the same. Q11. What type of ac motor is most widely used? Split-Phase Induction Motors One type of induction motor, which incorporates a starting device, is called a split-phase induction motor. Split-phase motors are designed to use inductance, capacitance, or resistance to develop a starting torque. The principles are those that you learned in your study of alternating current. CAPACITOR-START.—The first type of split-phase induction motor that will be covered is the capacitor-start type. Figure 4-11 shows a simplified schematic of a typical capacitor-start motor. The stator consists of the main winding and a starting winding (auxiliary). The starting winding is connected in parallel with the main winding and is placed physically at right angles to it. A 90-degree electrical


Electrical News
Understanding Peak Floating-Point Performance Calculations
FPGAs with hardened floating-point DSP blocks are now available, providing...
eetimes.com
As Revenue Dips, China Mobile Pushes 4G
China Mobile's 2014 nine-month income fell by 9.7% compared with...
eetimes.com
CodinGame Helps Hone Programming Skills
CodinGame's forthcomoing challenge will involve developers from around the world...
eetimes.com
IBM, GF Strike Historic Fab Deal
IBM will transfer its two loss-making fabs to GlobalFoundries along...
eetimes.com
IoT Group Turns Off TV Band
The Weightless SIG is turning away from its TV White...
eetimes.com
Computer Vision Opens New API
The Khronos Group has officially released OpenVX, a high-level applications...
eetimes.com
Spansion Expands MCUs With IoT on Its Radar
Spansion has unveiled 96 new MCUs, additions to the company's...
eetimes.com
First 2D Atomic Piezoelectric Discovered
The world's first 2D monolayer material has been shown to...
eetimes.com
Knobs and Buttons Are Toast, Long Live the Pinch
Knobs and buttons still rule as instrument controls, but smartphone...
eetimes.com
The Best of the Best Videos on YouTube
If you were compiling a list of 'The Best of...
eetimes.com
Forum Problems
Sorry, the EEVblog forum is having major issues with posting....
eevblog.com
Mega MATLAB Release From MathWorks
R2014b is an extremely compelling release for current MATLAB users...
eetimes.com
How to Diagnose Failed Memory
With a purpose-built MBIST controller, both test application and data...
eetimes.com
Thought-Provoking Nugget of Knowledge: Island Universes
If galaxies were shrunk to the size of apples, how...
eetimes.com
Ethernet Dike Sprouts Cracks
At least a half dozen new efforts are sprouting up...
eetimes.com
Do Engineers Dream of Electric Sheep?
Frustration, confusion, and fear are among the most common themes...
eetimes.com
Friday Quiz: Radar
Test your knowledge on this old -- yet up-and-coming --...
eetimes.com
Nanotube Field Emitters Beat OLEDs
Like a cathode ray tube of old, nanotube field emitters...
eetimes.com
Apple Debuts Next-Gen Tablets, PC
Apple released updates to its iPad, PC, and operating systems...
eetimes.com
AMD Plans 7% Layoffs
AMD will lay off 7% of its staff by the...
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 +