Planar Magnetic Technology for Headphones

Planar magnetic technology is being revived by a few specialized HiFi audio companies. These companies manufacture headphones that feature planar drivers that are based on the old school, which produce a an incredibly full, rich sound signature.

This paper analyzes the core properties of a planar Magnetic loudspeakers magnet device by looking at winding conduction loss leakage inductance, and winding capacitance. Additionally, a method to reduce these parasitic elements is proposed.

Low profile or low vertical height

Planar magnetics are more efficient and have a lower profile than traditional wire-wound magnets. It also minimizes parasitic capacitance and leakage inductance. This method allows for a smaller size core to be utilized, which reduces the cost of the device. It does not require the magnets to be clamped. This makes it perfect for power electronics devices.

Planar magnetic technology has the advantage of being lighter and smaller than traditional headphones. It is also able to handle higher frequencies without distortion. This is due to the flat diaphragm which is used in these devices, which is often made of a thin film and is fitted with a conductor trace it. This film can react quickly to audio signals and can produce high pressure levels.

This means that the sound produced by these devices is richer and more detailed. Many audiophiles like this, especially those who want to listen to music at home or in the office. It is important to keep in mind that a planar magnet driver requires a powered amplifier and digital audio converters to work correctly.

The sound that is produced is more natural and precise in comparison to dynamic drivers. Planar magnetic drivers are capable of responding to changes in audio signals much faster, making them ideal for listening fast music.

Despite their advantages, planar magnetic drivers have some disadvantages. One is their high price that can be attributed to the huge amount of magnetic material needed for their operation. Their weight and size can be a hindrance particularly when they are being used as portable devices.

Wide band gap (WBG), devices

Wide band gap (WBG), semiconductors are materials that possess higher electrical properties than traditional silicon-based devices. They can endure higher voltages and current densities. This makes them ideal for optoelectronics and power electronics applications. Wide band gap semiconductors like gallium nitride and silicon carbide can bring significant improvements in performance, size, and cost. They are also more environmentally friendly than traditional silicon devices. These attributes make them appealing to aerospace and satellite manufacturers.

Planar magnetic drivers operate using the same principles as dynamic drivers. A conductor in an electrical circuit moves between magnets that are fixed when audio signals pass through them. But instead of a coil that is attached to a conical diaphragm, planar magnetic drivers use a flat array of conductors that are attached to, or embedded in a diaphragm-like film that is able to be made thin. Conductors function as coils which are placed directly on the diaphragm and are placed between two magnets, creating the push/pull mechanism that causes the diaphragm to move.

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

Generally speaking, headphones with magnetic drivers that are planar cost more than other models due to their complexity and higher price. There are several excellent and affordable options, such as the Rinko from Seeaudio or S12 /Z12 by LETSHUOER and others that were recently released.

Power electronics

Planar magnetics dissipate heat more efficiently than traditional wire wound components. This lets them handle more power without creating excessive strain or audible strain. This makes them perfect for use in headphones. Planar magnetics are more efficient and provide a greater power density. The technology is ideally designed for applications such as electric vehicle 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 drivers work using a different method. A flat array of conductors rests directly on the diaphragm and when an electromagnetic signal flows through the array, it creates a push-pull interaction with the magnets on both sides of the diaphragm. This creates soundwaves that move the diaphragm, and create audio.

planar magnetic loudspeakers magnetic devices are more efficient than conventional magnetics due to the fact that they have a higher surface-to-volume ratio. This means they can disperse more heat, which allows them to operate at higher frequencies of switching without exceeding their maximum temperature ratings. They also have lower thermal sensitivities than wire-wound devices. This allows them to be used in more compact power electronic circuits.

To optimize a planar boost inductor, designers should consider several factors, including the design of the core winding configuration, losses estimation, and thermal modeling. Ideally, the inductor should have a low leakage inductance as well as winding capacitance, and be simple to integrate into PCBs. Furthermore, it should be capable of handling high currents and have a small size.

The inductor should also be compatible with multilayer PCBs that have through-hole or SMD package. Moreover the copper thickness has be sufficiently thin to reduce eddy currents within the layers and also prevent thermal coupling between conductors.

Flexible circuit-based planar Winding

In the field of planar magnetics, flex circuit-based windings can be employed to make an inductor with high efficiency. They use one-patterned conductor layers on dielectric film that is flexible and can be made by using a variety of metal foils. Copper foil is a popular choice because it has excellent electrical properties. It is also processed to permit termination features both on the back and front. Conductors in a flex circuit are joined by thin lines that extend beyond the edges of the substrate, thereby providing the flexibility required for tape automated bonding (TAB). Single-sided flexes can be found in a variety of thicknesses as well as conductive finishes.

In a typical pair of planar headphones, a diaphragm sandwiched between two permanent magnets. These magnets vibrate in response to electrical signals that are sent by your audio device. These magnetic fields generate a sound wave that travels across the entire surface of the diaphragm, creating a piston-like motion that prevents breakups and distortion.

Planar magnetic headphones can reproduce a broad range of frequencies, notably at lower frequencies. This is due to the fact that they have a larger surface area than conventional cone-type drivers, which allows them to move more air. They can also reproduce bass sounds with an increased level of clarity and details.

Planar magnetic headphones can be expensive to make and planar Magnetic Loudspeakers require a powered amplifier as well as a DAC in order to work effectively. They are also heavier and bulkier than standard drivers, making them difficult to transport and to fit into smaller spaces. Their low impedance also require much more power to drive, which can become a problem when listening to music at a high volume.

Stamped copper winding

Utilizing stamped copper windings in planar magnetic technology can increase the window utilization factor and reduce manufacturing costs. The technique involves making grooves in the body of the coil to support the windings at an exact location in the layer. This prevents deformations of the coil and increases the accuracy of the coil. This also reduces scrap and improves quality control. This type of planar coil is typically used in contactor coils and relay coils. It can also be found in ignition coils and small transformers. It can also be used in devices with wire thicknesses of up to 0.05 mm. The stamping process creates an even winding with a high current density. It also ensures that the windings are perfectly placed on the coil body.

Contrary to traditional dynamic drivers that use a conductor voicecoil behind the diaphragm to produce sound waves, planar magnetic headphones have a variety of flat conductors placed directly to the diaphragm. These conductors vibrate when electronic signals are applied. This creates a pistonic movement that produces sound. As a result, planar magnetic headphones can provide superior sound quality than other audio drivers.

In addition to reducing weight and cost in addition, this technology has the potential to increase the frequency of planar magnetic transducers. This is significant since it lets them operate over a wider frequency range. Additionally, it reduces the power requirements of the driver.

Nevertheless, there are some disadvantages to this new technology. It can be difficult to create a thin-film diaphragm that can withstand the extreme temperatures required for this technology. However, companies like Wisdom Audio have overcome this problem by creating an adhesive-free option that can withstand temperatures of up to 725degF (385degC). This allows them to create audio with the highest quality without compromising durability and longevity.