A dynamo is an electrical generator. It works on the principle of using rotating coils to convert mechanical rotations into direct electric current. Dynamo generators were the first large-scale generators available to deliver large amounts of power to an industrial complex. It was the forerunner to present day electrical generators such as the electric motor and the alternator. Dynamos are obsolete today because of the widespread use of alternating current, the simplicity of converting alternating current to direct current and the proliferation of small solid state devices that require small scale, more efficient power sources. Regardless of the size and make-up, dynamo generators obey ohms law where current equals voltage divided by resistance.
Things You'll Need
- Dynamo generator and rotating coil specifications
Locate the specifications for the rotating coil. Find the manufactured measure resistance level. Resistance decrease is proportional to the cross-sectional area of the rotating coil assembly. For this reason, resistance tend to be low for dynamo generators. As an example, assume 0.005 ohms or 5 milliohms.
Determine the voltage rating of the coil from the specification. Because of the low resistance, the amount of voltage produced across the rotating coil assembly will be low. As an example, assume 2 volts.
Determine the current by dividing the voltage by the resistance. Using the examples above, the current flowing through the rotating coil is 400 amps (2/0.005).
- Photo Credit Department of Energy/Photodisc/Getty Images
How Does a Bicycle Tire Generator Work?
An electric generator is a device that converts mechanical energy to electrical energy through the use of electromagnetism. There are multiple styles...
Thermoelectric Generator Basics
A thermoelectric generator is a device that turns a difference in heat into electricity. As long as it has access to both...
How to Calculate Generator Loads
Calculating a generator load requires determining the total power requirement for a home. This can be done by using a manual calculation...
How to Calculate Generator Output
Electrical generators use watts to rate the generator's output. Watts is a combination of voltage times the electrical devices load capacity in...
How Do Electric Generators Work?
Electric generators work by moving an alternating current to an output. Find out what connects coils to electric outputs with information from...