Electro Magnetic Ribbon Coil
Electromagnetic Coil Capabilities
Electromagnetic induction occurs when a current flows through a single wire. Everyday machines like transformers, generators, and electric motors work on the principle of electromagnetic induction. Today, most electromagnetic induction coils feature a central cylindrical core that’s made of soft iron. Additionally, two insulated coils are wound: a primary coil and an inner coil. These coils have few turns of copper wire while a surrounding coil (secondary) has a larger number of turns of thin copper wire. It is important to note that a coil’s magnetic field strength is determined by the ampere turns. The more turns of wire a coil has, the greater the strength of the surrounding static magnetic field.
Transformers
Transformers are used to change electrical current properties from one circuit to another. Virtually all of the electrical power we use daily is processed through transformers at some point. These devices, however, require electromagnetic induction coils to achieve this task. In standard transformers, two coils are typically wrapped around the same iron core. A varying magnetic flux is created when AC passes through the primary winding. This magnetic field then strikes the secondary winding to generate an AC voltage.
It is a common practice for power companies to install step-up transformers, which help boost the voltage by hundreds of kV. After it is transmitted to the distribution grid and back to usable voltages, it is used to power our everyday electrical applications. A benefit of installing electromagnetic induction coils in transformers is that they help minimize potential power loss in transmission lines.
Electric Motors
In some cases, electromagnetic induction coils are the basis of electric motors. These coils generate rotation by using the electrical current that passes through their wires. A major benefit is that electromagnetism allows electric motors to spin freely and efficiently. Look around you! You will find that many appliances utilize electric motors to function, including microwave ovens, refrigerators, dryers, furnace blowers, computers, and much more. Nearly everything mechanical that moves requires an electric motor to accomplish its movement.
Air Coil Inductors
Also known as an air core inductor, this type of wire coil does not feature a magnetic core in the coil. Air coil inductors function on the basis that air has adequate electrical conductivity. When the air-core inductance is low, there will be a small magnetic field. Due to the weak magnetic field, these coils achieve a faster current rise without losing their signal. Therefore, air coil inductors typically suit switch mode magnetic requirements where reduced core loss, high linearity, and high frequency are needed.
Medical Devices
Partially- and fully automated electronics have positively changed how the medical industry operates. Electromagnetic induction coils can be found in CT scan devices, MRI machines, and ECG equipment. Additionally, these coils are used to charge biomedical device batteries and installed in certain surgical devices. Today, electromagnetic induction coils are increasingly installed in monitoring equipment that is needed to display heart rate, oxygen levels, blood pressure, and other vital parameters.
Because air coils use fine gauge wires, they are found in internal arterial probes used to perform diagnostic procedures. All in all, thin and insulated electromagnetic induction coils are reliable components to have in mission-critical applications where precision and tight tolerances must be considered.