Planar Magnetic Technology for Headphones
A handful of HiFi audio companies are trying to revive the planar magnetic technology. These companies create headphones with traditional planar drivers that produce a a rich sound signature.
This paper analyzes the core properties of a planar magnetic device by studying the loss of winding conduction as well as leakage inductance and winding capacitance. A method is also suggested to reduce the parasitic elements.
Low profile or low vertical height
As compared to traditional wire-wound magnets
Best planar magnetic iem magnetic technology has lower profile and higher efficiency. It also reduces parasitic capacitance and leakage inductance. This technique also allows the use of a smaller core, which decreases the total cost of the device. It also does not require that the magnets be clamped. This makes it suitable for use in power electronics devices.
Another benefit of planar magnetic technology is that it is smaller and lighter than traditional headphones. It is also able to handle higher frequencies without distortion. This is due to the flat diaphragm which is employed in these devices, which is typically made of a thin layer and has a conductor trace on it. This film can react quickly to audio signals and produce high sound pressure levels.
The sound produced by these devices will be richer and more detailed. Many audiophiles like it, particularly those who want to listen to music at home or in the office. It is important to keep in mind that the planar magnetic driver needs an amplifier that is powered and a digital audio converter (DAC) to function properly.
The sound is more natural and precise in comparison to dynamic drivers. Planar magnetic drivers are also capable of responding to changes in audio signals much quicker, which makes them ideal for listening fast music.
Despite their benefits, planar magnet drivers have a few disadvantages. Their cost is attributed in part to the massive amount of magnetic material needed to operate. Their weight and size can 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 standard silicon-based devices. They are able to withstand higher current densities, higher voltages, and lower switching losses. They are therefore ideal for optoelectronics and power electronics applications. Wide band gap semiconductors, including gallium nitride or silicon carbide, can provide significant enhancements in performance and size. They are also greener than conventional silicon devices. These features make them attractive to satellite and aerospace companies.
Planar magnetic drivers work using the same principles as dynamic drivers, and rely on an electrical conductor that moves between fixed magnets whenever audio signals are passed through them. But instead of a coil attached to a conical diaphragm planar magnetic drivers utilize an array of conductors that are flat connected to, or embedded into, a film-like diaphragm that can be made very thin. The conductors comprise a set of coils' that are placed on the diaphragm, and are placed directly between two magnets. This causes the push/pull phenomenon that creates the diaphragm's to move.
This technology produces distortion-free music and produces a distinctive and pleasing sound. The even distribution of the magnetic force across the entire surface of the driver and the absence of a coil sitting behind the diaphragm cause it to move evenly and quickly, resulting in a highly detailed, accurate sound. The resulting sound is known as isodynamic, orthodynamic, or magnetically-incident.
Generally, headphones that have planar magnetic drivers are more expensive than other types due to their complexity and price. There are some great and affordable options like the Rinko from Seeaudio or S12 Z12 from LETSHUOER which were recently released.
Power electronics
Unlike traditional wire wound magnetic components planar magnetics are better in dispersing heat. This lets them handle more power without causing excessive strain or audible strain. This makes them perfect for applications such as headphones. Planar magnetics are more efficient and also offer greater power density. This technology is especially suited for applications such as fast charging of electric vehicles as well as battery management, and military equipment.
Planar magnetic drivers operate using a different model than dynamic driver headphones. Dynamic driver headphones use an acoustic diaphragm, which is suspended by a voice coil. A flat array of conductors sits directly on the diaphragm and when an electromagnetic signal passes through the array, it triggers a push-pull interaction with the magnets on both sides of the diaphragm. This produces sound waves that move the diaphragm producing audio.
Planar magnetic devices are more efficient than conventional magnetics since they have a higher surface-to-volume ratio. They are able to disperse heat more effectively, allowing for higher switching frequencies while keeping their maximum temperature rating. They have lower thermal sensitivities compared to wire-wound devices. This allows them to be utilized in smaller power electronic circuits.
Designers need to consider a variety of aspects to optimize a planar booster inductor. These include the core design, winding configurations, losses estimation, and thermal modeling. In the ideal scenario, the inductor will have low leakage inductance and winding capacitance, and be simple to integrate into PCBs. Additionally,
best planar magnetic iem it should be capable of handling high currents and should be smaller size.
In addition, the inductor must be compatible with a multilayer PCB that has a through-hole or SMD package. Moreover the copper thickness has be sufficient to limit eddy currents in the layers and also prevent thermal coupling between conductors.
Flexible circuit-based planar winding
In planar magnetics, flex circuit-based windings can be used to create a high-efficiency resonance. They are made with dielectric films that are single-patterned and an individual-patterned copper foil. Copper foil is a popular choice due to the fact that it has excellent electrical properties. It can also be processed to allow termination features both on the back and front. The conductors in a flex circuit are linked with thin lines that extend beyond the edges of the substrate, thereby providing the flexibility needed for tape automated bonding (TAB). Single-sided flex circuits can be found in a wide range of thicknesses as well as conductive coatings.
In a typical pair of planar headphones, a diaphragm will be sandwiched between two permanent magnets. These magnets oscillate in response the electrical signals that are sent by your audio device. These magnetic fields create a soundwave that travels along the entire surface of diaphragm. This piston-like motion stops distortion and breaks.
Planar magnetic headphones are able to reproduce a wide range of frequencies, particularly at lower frequencies. This is because they can create a greater surface area than conventional cone drivers, allowing them to move more air. They also reproduce bass sounds at an increased level of clarity and details.
best planar magnetic iem magnetic headphones can be expensive to manufacture and require a powered amplifier as well as a DAC to function effectively. They are also larger and heavier than traditional drivers, making them difficult to transport. Also their low impedance demands a lot of power to drive them and can quickly add up when you're listening to music at high volumes.
