Hello friends Summarized! Have you ever seen ontel bicycles that have lights that turn on when walking? Did you know that a bicycle dynamo generates electrical energy? Yes, a bicycle dynamo is an example of the application of Faraday’s law which states that if a coil is rotated in an area around a magnetic field so that it cuts the lines of magnetic force, then each coil has an electromotive force (EMF).
How to Make a Bicycle Dynamo Produce Electrical Energy
How Dynamo Works
A bicycle dynamo consists of several main components, namely permanent magnets , coils , commutators , and brushes . Permanent magnets are used to create a permanent magnetic field. The coil serves to cut the lines of magnetic force and produce emf. The commutator functions to convert alternating current into direct current. The brush functions to connect the coil to a source of electrical load, such as a lamp.
The way a bicycle dynamo works is as follows:
When the bicycle wheel rotates, the bicycle dynamo installed near the tire also rotates.
The rotation of the bicycle dynamo causes the coil inside to rotate around the permanent magnet as well.
The rotating coil cuts the lines of magnetic force and produces an emf which varies according to the angle of rotation of the coil.
This varying emf is an alternating current that cannot be used to turn on a lamp.
Therefore, a commutator is needed which is attached to the end of the coil to convert alternating current into direct current.
The commutator works by reversing the polarity of the coil each time the coil passes through the neutral point of the magnetic field.
The direct current generated by the commutator is then channeled to the brush which is connected to the lamp.
The light will turn on because it gets an electric current from the bicycle dynamo.
In this way, the bicycle dynamo can generate electrical energy from the rotary motion of the bicycle wheel. However, the electrical energy generated by a bicycle dynamo is not large, only about 3 watts. If we want to increase the electrical energy generated by a bicycle dynamo, we can do several things, such as:
Increase the rotational speed of the bicycle wheel. The faster the bicycle wheel rotates, the faster the bicycle dynamo and the coils in it rotate. This will increase the frequency and amplitude of the emf generated by the coil.
Increase the number of turns of the coil. The more turns of the coil, the more lines of magnetic force cut by the coil. This will increase the emf value generated by the coil.
Increases the strength of the magnetic field. The stronger the magnetic field created by the permanent magnets, the greater the electromotive force generated by the coils.
By doing the above, we can turn a bicycle dynamo into a mini power generator that can be used to charge cell phones or other electronic devices. Of course, we also need to add some additional components, such as regulators, switches, and connecting cables. Here is an example of a bicycle dynamo circuit that can charge a cellphone battery:
Component
Function
Bicycle dynamo
Generates electrical energy from the rotary motion of a bicycle wheel
Regulators
Stabilize the voltage and electric current generated by the bicycle dynamo
Switch
Control the flow of electricity from the bicycle dynamo to the cellphone battery
Connecting cable
Connect bicycle dynamo with regulator, switch and cell phone battery
Install the bicycle dynamo near the bicycle tire and connect it with a connecting cable.
Install the regulator in a safe place and connect it with a connecting cable.
Install the switch in an easily accessible place and connect it with a connecting cable.
Install the cellphone battery you want to charge and connect it with the connecting cable.
Turn on the switch to supply electricity from the bicycle dynamo to the cellphone battery.
Start cycling at a speed sufficient to generate electrical energy from the bicycle dynamo.
Turn off the switch when the phone battery is charged or if you want to stop cycling.
In this way, we can use the motion of a bicycle to produce electrical energy that can be used to charge cell phones or other electronic devices. This is one way to save energy and reduce environmental pollution.
Conclusion
The bicycle dynamo is an example of the application of Faraday’s law which converts motion into electrical energy. A bicycle dynamo consists of several main components, namely permanent magnets, coils, commutators and brushes. The way a bicycle dynamo works is by rotating the coil around a magnetic field so that it cuts the lines of magnetic force and generates EMF. This EMF is then converted into direct current by the commutator and supplied to lamps or other electronic devices. The electrical energy generated by a bicycle dynamo can be increased by increasing the rotational speed of the bicycle wheel, the number of turns of the coil, or the strength of the magnetic field. By adding a few additional components, such as a regulator, switch, and connecting cables, we can turn a bicycle dynamo into a mini power generator that can charge cell phones or other electronic devices.
Thus the article on how to make a bicycle dynamo produce electrical energy. Hopefully this article is useful and adds to your insight. If you have questions or suggestions regarding this article, please write in the comments column below. Thank you for reading this article to the end. See you in the next article!
