It has the advantage that the battery will charge, in spite of a bad connection, but has the disadvantage that the high-current leads can eventually burn out because of this, without the owner even noticing beforehand that there is a problem in the circuit. One thing to keep in mind is that the output-power provided by the stator-winding is delivered in between the phases. The ground in the charging system is the negative output from the rectifier. The AC-part of the three phase system is floating from ground.
The Field Controlled Generator System The other system used on motorcycles is the field-controlled generator. The system itself works on the principles as a permanent magnet generator, the only big difference is that there are no permanent magnets but instead there is an electromagnet that provides the necessary magnetism.
This magnetism is normally called the "field" The electromagnet is a single big winding on a metal core that gets magnetized as soon as there is DC-current flowing through the winding, supplied by the battery. A car-generator basically uses the same system. On most of the field-controlled systems this metal core has claw-poles and two slip rings. The whole thing rotates with the crankshaft, with the statorwinding just like the permanent-magnet stator around it.
Imagine looking at the outer side of the rotor sideways. You will see two pieces of metal pressed together with a winding in between. When you apply battery-voltage across the sliprings, the rotor will behave like a big electromagnet, and the left-hand side of the rotor will be say a north-pole, then the right-hand side will be a south-pole. In the middle you can see the pieces overlapping, meaning when the rotor rotates there first will be a south-pole passing, then a north-pole, then a south-pole etc.
This is the needed varying magnetic field for generating AC-current in the stator-winding. The three-phase AC output from the stator-winding is led through a rectifier inside the regulator-rectifier-unit to convert it to DC for charging the battery.
When the voltage drops below app This is a constant process and the result of this is a constant voltage across the battery-terminals of Because there is no excess power produced by the stator, this system is very efficient. Counterside is that it is not as simple and small as a permanent magnet generator. The field winding normally has one side connected to the battery-positive through the ignition-switch.
So there is only power for the field when the ignition is turned on. Regulation is done through the regulator-part of the regulator-rectifier by switching the ground for the field on or off. On some machines the set-up is the other way around, then one side of the field is connected to ground at all times, and the other side is switched on or off to a positive feed through the ignition-switch by the regulator.
Then the stator is located inside a cover, as well as the field winding in the middle of it. In between rotates an iron claw-pole driven by the engine. The claw-pole gets magnetized by the field winding and the system works like the field-controlled one as explained above. Motorboat Mechanics and Service Technicians, viewed June 2, For details, contact the program representative at the campus you are interested in attending.
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See Table 1. Bureau of Labor Statistics, www. Students are responsible for any other costs such as lab fees associated with the course. Bureau of Labor Statistics projects an annual average of 61, job openings between and Job openings include openings due to net employment changes and net replacements.
Bureau of Labor Statistics projects an annual average of 43, job openings between and Bureau of Labor Statistics projects an annual average of 24, job openings between and Bureau of Labor Statistics projects an annual average of 13, job openings between and Bureau of Labor Statistics projects an annual average of 11, job openings between and Bureau of Labor Statistics projects that total national employment for Automotive Service Technicians and Mechanics will be , by Bureau of Labor Statistics projects that total national employment for Automotive Body and Related Repairers will be , by Bureau of Labor Statistics projects that total national employment for Welders, Cutters, Solderers, and Brazers will be , by Bureau of Labor Statistics projects that total national employment for Computer Numerically Controlled Tool Operators will be , by Bureau of Labor Statistics projects the national average annual job openings in each of the following occupations between and will be: Automotive Service Technicians and Mechanics, 61,; Bus and Truck Mechanics and Diesel Engine Specialists, 24,; and Welders, Cutters, Solderers, and Brazers, 43, Universal Technical Institute of Illinois, Inc.
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Get Info Get Info. Previous Step. Table of Contents. Image credit Krishna Auto Electric While the term alternator is commonly associated with automotive style units, the official definition is: a device that creates Alternating Current AC power from mechanical motion.
What Is A Motorcycle Alternator? Do Motorcycles Have Alternators? Stator vs. Alternator: What is the Difference? Automotive Style Alternator all-in-one style unit A motorcycle stator is a component of the electrical system that, when combined with a rotating magnet, creates AC current. Motorcycle Alternator As stated above, a stator is one component of the motorcycle charging systems. The modern rectifier is a series of diodes that converts AC power to DC.
After that, the electricity moves to the voltage regulator, which… ready for it? And here we have the stator tucked inside the rotor. The part facing the camera here is normally bolted to the bike, and the rotor covers it.
This would be the view you'd see were you standing inside the engine. Note that those four pieces — the stator, the rotor, the regulator, and the rectifier — can be packaged together or separately. Note that collectively, a stator and a rotor make up an alternator, which is a type of generator. Crystal clear, right? Some bikes, notably touring machinery, use a version of that system where everything is held in one container, usually referred to as an alternator. Now, if someone tells you his stator is fried, you'll know he just means that the thing that charges the battery has taken the day off, assuming he truly has a stator.
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