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Planar Magnetic Technology for Headphones

A few HiFi audio companies are reviving the planar magnetic technology. These companies make headphones using old-school planar drivers that deliver an impressive sound experience.

This paper analyzes the core characteristics of a planar magnetic device by studying winding conduction losses leakage inductance, and winding capacitance. In addition, a method to reduce these parasitic elements what is a planar headphone (www.stes.tyc.edu.tw) proposed.

Low vertical height or low profile

Compared to traditional wire-wound magnetics, planar magnetic technology offers lower profile and greater efficiency. It also minimizes parasitic capacitance and leakage inductance. This method allows for a smaller size core to be used, which lowers the cost of the device. It also does not require that the magnets be clamped. This makes it ideal for power electronics devices.

Planar magnetic technology has the benefit of being lighter and smaller than traditional headphones. It can also handle more frequencies without distortion. This is because the diaphragm, which is flat, used in these devices is often composed of a thin film with a conductor trace. This film can react quickly to audio signals, and produce high sound pressure levels.

This means that the audio produced by these devices is more pronounced and clear. Many audiophiles like it, particularly those who prefer listening to music at work or at home. It is important to keep in mind that a planar magnetic driver requires a powered amplifier and digital audio converters in order to function effectively.

The resulting sound is much more natural and precise than that of dynamic drivers. Planar magnetic drivers are also capable of reacting to changes in audio signals much faster, making them perfect for listening fast music.

Despite their benefits, planar magnet drivers have a few drawbacks. Their cost is partially due to the massive amount of magnetic material required to operate. Their size and weight could be a challenge, especially when they are being utilized as portable devices.

Wide band gap (WBG) devices

Wide band gap (WBG) semiconductors are a group of materials that have better electrical properties than conventional silicon-based devices. They can withstand higher voltages and current densities. They are therefore ideal for optoelectronics and power electronic applications. Wide band gap semiconductors like silicon carbide and gallium nitride can offer significant enhancements in terms of performance, size, and cost. They are also more eco-friendly than conventional silicon devices. These attributes make them attractive for aerospace and satellite manufacturers.

Planar magnetic drivers operate on the same principles as dynamic drivers. An electrical conductor moves between two magnets that are fixed when audio signals travel through them. Planar magnetic drivers, however, employ a flat array of conductors embedded or attached to a thin diaphragm-like film instead of coils. Conductors function as a set of 'coils' which are placed directly on the diaphragm and are positioned between two magnets, causing the aforementioned push/pull interaction that causes the diaphragm to move.

This technology produces distortion-free music and produces a distinctive, pleasing sound. The driver moves uniformly and swiftly due to the uniform distribution of magnetic force over the entire surface and absence of a coil in the diaphragm. This results in a clear and accurate sound. The resulting sound is known as isodynamic, orthodynamic, or magnetically-incident.

However, due to their intricate design and price headphones with planar magnetic drivers are typically more expensive than those with other driver technologies. However there are a variety of great, affordable options like the Rinko by Seeaudio and S12 Z12 by LETSHUOER that were recently released.

Power electronics

Unlike traditional wire wound magnetic components, planar magnetics are better in dispersing heat. This allows them to handle more power without causing excessive strain or audible strain. This makes them perfect for headphones. Planar magnetics are more efficient and offer a greater power density. The technology is especially suitable for applications like electric vehicle fast charging, battery management, and military systems.

In contrast to dynamic driver headphones, which make use of a diaphragm suspended by a voice coil, planar magnetic planar speakers drivers work using a different method. When an electromagnetic signal is transmitted through the array and the magnets on either side of the diaphragm are pulled together and a push-pull effect is produced. This creates soundwaves that move the diaphragm and generate audio.

Planar magnetic devices are more efficient than conventional magnetics since they have a higher surface-to-volume ratio. They can disperse heat more effectively, allowing for higher switching frequencies while maintaining their maximum temperature rating. They also have lower thermal sensitivities than wire-wound devices, which allows them to be used in smaller power electronic circuits.

Designers need to consider a variety of aspects to optimize a planar booster inductor. These include core design winding configurations, winding configurations, losses estimation, and thermal modeling. In the ideal scenario, the inductor will have low leakage inductance and winding capacitance. It should also be easy to integrate into a PCB. It should also be able to handle high currents and should be compact in size.

The inductor must be compatible with multilayer PCBs that have through-hole or SMD package. In addition the copper thickness has to be thin enough to prevent eddy currents from entering the layers and also prevent thermal coupling between conductors.

Planar winding based on Flex circuits

In planar magnetics, flex circuit-based windings can be used to make an extremely efficient resonance. They are made from one-patterned dielectric film and an individual-patterned copper foil. Copper foil is a popular choice due to the fact that it has excellent electrical properties. It is also processed to permit termination features both on the front and back. The conductors on a flex circuit are connected by thin lines that extend beyond the edges of the substrate, which provides the flexibility required for tape automated bonding (TAB). Single-sided flex circuits can be found in a range of thicknesses as well as conductive coatings.

In a typical pair of planar headphones, a diaphragm sandwiched between two permanent magnets. The magnets vibrate in response to the electrical signals that are sent by your audio device. The magnetic fields produce the soundwave that runs across the entire diaphragm's surface. This piston-like motion stops breakups and distortion.

One of the primary advantages of planar headphones is their ability to reproduce a larger frequency range, particularly in the lower frequencies. This is due to the fact that they can create a greater surface area than traditional cone-type drivers, which allows them to move more air. They also reproduce bass sounds with greater clarity and details.

However, planar magnetic headphones are costly to manufacture and require a powered amplifier as well as a DAC to perform correctly. They are also larger and heavier than conventional drivers making them difficult to transport. Additionally their low impedance demands a lot of power to drive them and can be a problem when you're listening to music at a high volume.

Stamped copper winding

Stamped copper windings are used in planar magnet technology to improve the window's efficiency and lower manufacturing costs. The method works by putting grooves on the coil body which ensure a precise layer of the windings. This method helps prevent deformations of the coil and improves tolerances. It also reduces the amount of scrap that is created during production and improves quality assurance. This kind of planar coil is typically employed in contactor coils as well as relay coils. It can also be found in ignition coils and small transformers. It can also be used in devices that have a wire thickness of up to 0.05 mm. The stamping produces a uniform coil with a high current density. It also ensures that the windings are properly placed on the coil body.

Planar magnetic headphones, unlike traditional dynamic drivers that employ a voicecoil conductor in the thin diaphragm, have an array of conductors that are flat directly applied to the diaphragm's thin surface. Conductors vibrate when electronic signals are applied. This causes the motion of pistons that produce sound. Planar magnetic headphones provide higher-quality sound compared to other kinds of audio drivers.

This technology can boost the bandwidth of transducers. This is crucial, what Is a planar headphone since it allows them to operate in a greater frequency range. It also reduces the power requirements of the driver.

This technology is not without some drawbacks. For instance, it could be challenging to create a diaphragm made of thin film that is capable of handling the high temperatures required for this kind of technology. Manufacturers like Wisdom Audio have overcome the challenge by developing a solution that is non-adhesive and is able to withstand temperatures as high as 725degF. This allows them to create audio of superior quality without compromising durability and longevity.