Planar Magnetic Technology for Headphones
Planar magnetic technology is being revived by a handful of specialized HiFi audio companies. These companies make headphones with
headset planar drivers that are based on the past that produce a a rich, full-bodied sound signature.
This paper analyzes the core characteristics of a planar magnetic device by studying the loss of winding conduction, leakage inductance and winding capacitance. Additionally, a method to reduce the parasitic elements is proposed.
Low vertical height or low profile
Planar magnetics are more efficient and have a lower profile than traditional wire-wound magnets. It also reduces leakage and capacitance. This technique allows for a smaller core to be employed, which reduces the cost of the device. It also does not require that the magnets be clamped. This makes it ideal for use in power electronics devices.
Another benefit of planar magnetic technology is that it is smaller and lighter than traditional headphones. It can also handle a wider range of frequencies without distortion. This is due to the flat diaphragm which is used in these devices, which is typically made of a thin film and has a conductor trace on it. The film What Is A Planar Headphone (
Www.Annunciogratis.Net) able to react quickly to audio signals, and can produce high pressure levels.
The sound produced by these devices is more pronounced and clear. This is why it is preferred by many audiophiles, especially those who like listening to music at office or at home. It is important to remember that a planar magnet driver requires a powered amplifier as well as a digital audio converters in order to function properly.
The sound produced is more natural and precise when compared to dynamic drivers. Planar magnetic drivers can also respond more quickly to changes in the audio signal, which means they are ideal for listening to fast music.
Despite their advantages however, planar magnet drivers do have a few disadvantages. Their price is attributed in part to the large amount magnetic material required to make them work. Their size and weight could be a hindrance particularly when they're being used as portable devices.
Wide band gap (WBG), devices
Wide band gap (WBG) semiconductors are a class of materials which have higher electrical properties than conventional silicon-based devices. They can endure higher voltages and current density. They are therefore perfect for optoelectronics as well as power electronics applications. Wide band gap semiconductors such as silicon carbide and gallium nitride can bring significant improvements in performance, size and cost. They are also more environmentally friendly than traditional silicon-based products. These attributes make them attractive to satellite and aerospace manufacturers.
Planar magnetic drivers work in the same way as dynamic drivers. An electrical conductor moves between two magnets fixed when audio signals pass through them. But instead of a coil bonded to a conical diaphragm planar magnetic drivers utilize conductors in a flat array that are attached to, or incorporated into, a film-like diaphragm that can be made very thin. The conductors act as a set of 'coils' that are placed directly on the diaphragm, and are positioned between two magnets, resulting in the push/pull effect that causes the diaphragm to move.
This technology creates music that is free of distortion and has a unique pleasant sound. The even distribution of magnetic force over the entire surface of the driver and the absence of a coil sitting behind the diaphragm causes it to move in a uniform manner and quickly, producing a highly detailed, accurate sound. The resulting sound is known as isodynamic, orthodynamic, or magnetically-incident.
However, due to their intricate design and higher price, headphones using planar magnetic drivers are usually more expensive than those with other driver technologies. There are some great and affordable options, such as the Rinko from Seeaudio or S12 /Z12 by LETSHUOER which were released recently.
Power electronics
Planar magnetics can disperse heat more effectively than traditional wire wound components. This allows them to handle greater power without undue strain or audible strain. This makes them perfect for applications like headphones. In addition to their improved efficiency, planar magnets also provide greater power density. The technology is particularly suited for applications like fast charging of electric vehicles, battery management, and military systems.
Compared to dynamic driver headphones which use a diaphragm that's suspended by a voice coil, planar magnetic drivers operate with a completely different premise. A flat array of conductors sits directly on the diaphragm and when an electromagnetic signal passes through the array, it causes a push-pull interaction with the magnets on both sides of the diaphragm. This produces sound waves that move the diaphragm, creating audio.
Planar magnetic devices are more efficient than conventional magnetics since they have a greater surface-to-volume ratio. This means that they can disperse more heat, allowing them to operate at higher switching frequencies without exceeding their maximum temperature ratings. They have lower thermal sensitivities in comparison to wire-wound devices. This allows them to be used in smaller power electronic circuits.
Designers should consider a variety of factors to optimize a planar booster. These include the core design winding configurations, winding configurations, losses estimation and thermal modeling. The ideal inductor features include low winding capacitance, low leakage inductance, as well as easy integration into a PCB. Furthermore, it must be able to handle high currents and be of a tiny size.
The inductor should also be compatible with multilayer PCBs with through-hole or SMD package. In addition the copper thickness has be sufficient to prevent eddy currents from entering the layers and prevent thermal coupling between conductors.
Flexible circuit-based planar Winding
In planar magnetic technology, flex circuit-based windings are employed to make an inductor that is high-efficiency. They use one-patterned conductor layers that are a flexible dielectric film and can be made using a variety of metal foils. The most common is copper foil, which has superior electrical properties and is processed to allow termination features on both sides. The conductors in a flex-circuit are connected by thin lines that extend beyond the edges on the substrate. This gives the flexibility required for tape automated bonding. Single-sided flex circuits are offered in a wide range of thicknesses as well as conductive coatings.
In a typical pair of
planar magnetic headphone headphones, the diaphragm will be placed between two permanent magnets that move in response to the electric signals generated by your audio device. These magnetic fields generate the sound wave that moves across the entire diaphragm's surface and creates a piston-like motion which prevents distortion and breakups.
One of the primary benefits of planar magnetic headphones is their ability to reproduce a greater frequency range, particularly in the lower frequencies. This is because they can produce a larger surface area than conventional cone drivers, allowing them to move more air. Additionally, they can reproduce bass sounds with a much higher clarity and detail.
Planar magnetic headphones are expensive to manufacture and
what is A planar Headphone require a powered amplifier and DAC for operation effectively. They are also heavier and bigger than traditional drivers, making them difficult to transport. Also, their low impedance requires an enormous amount of power to drive them and can add up quickly when you're listening to music at a high volume.