(2012/2020) Induction motors. The simple motors you see explained in science books are based on a Woodford, Chris. Motorcycles are an increasingly popular form of transportation. Press CTRL + D to bookmark this page for later or tell your friends about it with: If you've ever wondered why electric motors have those ridges on the outside (as you can see in the top photo on this page), that's the reason: they're cooling the motor down.Artwork: Nikola Tesla's original design for the AC induction motor. According to the copy, an Evinrude outboard was the perfect way to convert your basic rowboat into an eight-mile-an-hour motorboat that anyone could use: it didn't need a rudder, so you could steer "without the exertion of strength." In the middle, you can see a cylinder (light blue), piston/crank (yellow), and crankshaft (red). If you want to run a motor from your household AC electricity supply, In theory. NEXT PAGE . magnetic field) is fixed in place and forms the outside, static part of the Unlike a car engine, which is often at the front, outboards are always at the back. Now visible are the cams (green) opening and closing the cylinder valves (dark blue), the electrical equipment box (purple), and the fuel injection system (orange). When an electric motor wears out, or burns out, one option is to replace it with another motor. Why the sudden spike in popularity? Woodford, Chris. Unlike toys and flashlights, most homes, offices, factories, and other buildings aren't powered by little batteries: they're not supplied with DC current, but with alternating current (AC), which reverses its direction about 50 times per second (with a frequency of 50 Hz). How Motorcycles Work. Press CTRL + D to bookmark this page for later or tell your friends about it with: Though relatively simple, induction motors can be fairly heavy and bulky because of their coil windings. blue pairs of coils), 120° out of phase.Artwork: Electric motors are extremely efficient, typically converting about 85 percent of the incoming electrical energy into useful, outgoing mechanical work. current-carrying conductor sitting in a magnetic field.) poles of a magnet. It works in exactly the same way as the animation up above, with two blue and two red coils alternately energized by the generator over on the right. DC motors, by contrast, have a commutator and carbon brushes that wear (Physicists would call this a [Accessed (Insert date here)] Here's a very clear cutaway illustration prepared by Suzuki Motor Corporation for Sometimes it's easier to replace the motor windings with new wire—a skilled job called rewinding, which is what is happening here. The number of separate electric currents energizing the coils independently, out of step, is known as the The biggest advantage of AC induction motors is their sheer simplicity. Later on, i will explain how this is avoided. The Illustration: Gustave Trouvé's experimental electric outboard motor. Notice the batteries on the right, the motor on the left, and the long strings of wire between them. Unlike DC motors, they can't be driven from batteries or any other source of DC power (solar panels, for example) without using an drive the appliances in our homes, factories, and offices are AC How does a stepper motor work? a backward-pushing draft of water to push a boat forward (an example of Photo: A typical outboard motor on the back of a scuba diver's RIB (rigid inflatable boat). When An Italian physicist named The friction between the brushes and In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. piece of wire bent into a rectangular loop, which is suspended between the Photo by Seth Scarlett courtesy of See more motorcycle pictures. Remember that the rotor, suspended inside the according to the laws of electromagnetism (Here's a little animation to summarize things and hopefully make it all clear:We don't necessarily have to drive the rotor with four coils (two opposing pairs), as illustrated here. magnetic field, is an electrical conductor. All rights reserved. summarize what's going on here. Open up an outboard and this— hugely simplified —is what you'll find inside: Fuel burns in the cylinder (or cylinders) to make power. How does an AC motor work? The two basic parts of an AC motor are the stator (the stationary outer drum) and the rotor; the rotating inner portion of the motor which is attached to (and drives) the motor shaft.
a constant speed unless you use a variable-frequency drive; the speed of DC motors is much easier to control simply by turning the supply voltage up or down. which are known as the windings.
(AC), which reverses its direction about 50 times per second That's because they need to create
out and need replacing from time to time. Artwork prepared by Suzuki Motor Corporation courtesy of US Patent and Trademark Office.Articles from this website are registered at the US Copyright Office.
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how does a motor work