Commercial building alternators
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Cheap high output alternator
Whoever came up with the alternator probably had his focus on having the AC power he needed but may not have had a background in electric power. I'm sure he knew what a generator was but started calling his unit an alternator simply for it giving AC current. Just an educated guess, or hypothesis, for a chance to use a big word. Somewhere along the time scale the usage changed to DC generator. Cars prior to about used DC generators.
With the availability high power silicon diodes in the late fifties it was possible to change to using the more efficient alternator. More efficient because the power coils are on the stator and not the rotor. Thus, better heat transfer. I believe Chrysler pioneered the use of the alternator in a car.
In common parlance the term generator is often somwhat misused when reffering to what should more correctly be called a generating set. This being an assembly of a generator together with an engine to drive it, together with cooling and controling components and a battery or other means of starting the engine. Terms are not allways used correctly, for example the very small generators often fitted to pedal cycles for lighting are often called dynamos, despite the fact that they produce AC and should therefore be called alternators.
Vehicle alternators do of course produce 3 phase AC from the windings, and are therefore correctly called alternators, despite the fact that this is rectified internally to DC for battery charging. Alternators have the ability to regulate output voltage. If you mean bicycles, the ones I had w a "few"years ago were small wheel driven dc generators whose output was not constant anything. Pedal fast and the incandescent lights could get pretty bright, obviously supplying both higher voltage and current.
Maybe today they are more sophisticated, especially with LED lamps. Besoeker Well-known member. Interesting points. Maybe it was called an alternator on cars firstly to differentiate it from the older DC generators.
A differentiator in the marketing sense in that the alternator was seen to be a superior machine and this was used to effect as a bit of a sales pitch. Electric-Light is right about portable and back-up units.
You dont buy or hire a portable alternator - well you do really - but it is never called that. We do a fair bit of work in the water industry on the potable side. In all the pumping stations I can recall visiting there has been a back-up Diesel generator.
An alternator in fact, but always called a generator. Oddly, or maybe not oddly, the term alternator has always been used in the power stations I've been in. Leestarkweather Well-known member. We often choose to upsize the alternator on the same size engine, if feeding Switch Mode Power Supply type loads UPS, rectifiers, computers.
So, IMHO, an engine is required to power the alternator, and the 2 components make up a generator generates power. So my answer created more questions. Like talking to the wife. Jraef Moderator Staff member. Jraef said:. The term "alternator'' was used to differenciate between the two. The word alternator has been used for a very long time to define an AC generator.
In post 3 I had suggested looking at the dictionary definitions for generator, dynamo, and alternator. K8MHZ Well-known member. K8MHZ said:. Generators don't put out squat for current when they aren't spinning fast. At an idle there usually isn't enough output to power accessories and charge the battery at the same time. Electric-Light said:. The stronger construction of automotive alternators allows them to use a smaller pulley so as to turn faster than the engine, improving output when the engine is idling.
The availability of low-cost solid-state diodes from onward allowed car manufacturers to substitute alternators for DC generators major American manufacturers had made the transition to alternators by , for example. Automotive alternators use a set of rectifiers diode bridge to convert AC to DC. To provide direct current with low ripple, automotive alternators have a three-phase winding.
In addition, the pole-pieces of the rotor are shaped claw-pole so as to produce a voltage waveform closer to a square wave that, when rectified by the diodes, produces even less ripple than the rectification of three-phase sinusoidal voltages.
Typical passenger vehicle and light truck alternators use Lundell or claw-pole field construction, where the field north and south poles are all energized by a single winding, with the poles looking rather like fingers of two hands interlocked with each other.
Larger vehicles may have salient-pole alternators similar to larger machines. The automotive alternator is usually belt driven at times the engine crankshaft speed. Automotive alternators are not restricted to a certain RPM because the alternating current is rectified to direct current and need not be any constant frequency.
Alternators were a vast improvement over generators. Generators rely on residual magnetism to start charging. That means if the battery is taken out and replaced you have to 'spark' two terminals on the generator together before it will charge.
That is known as 'polarizing'. You must log in or register to reply here.
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OEM Alternators and Starters + More
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Subscribe I monitor the voltage in my CR-V. You may need to replace the alternator if your headlights become dimmer while driving or your battery repeatedly runs down. The very first thing you need to do is verify what the voltage of the battery is with the engine running. Car and Truck Parts Store. Order Alternator for your Honda CR-V and pick it up in store—make your purchase, find a store near you, and get directions.
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Don't be fooled by cheap imitations. Mechman alternators are not cheap, but they have very high quality. And remember your car is going to lose some hp because it needs to draw that power from somewhere.
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Plus Line is a product line of generator alternators created by WEG which is a trusted brand of generators. The G Plus Line have innovative designs and excellent production capacity. These generator alternators Power in kVA : 8. Alternator 4 Poles, rpm, three phase, form 8,1 to 16 kVA.
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