N50 Voice Coil Actuator VCA Neodymium Magnets

N50 Voice Coil Actuator VCA Neodymium Magnets, Smartphone Auto Focus Camera Neodymium Voice Coil Magnet in Speaker of Mac iPad, Block Neodymium Magnet for Acoustic Modules, Rare Earth Super Strong Sintered NdFeB Amazing Micro Rectangle Circular Magnet in Linear Resonance Actuator, N54SH N52SH N50H Ni-Cu-Ni Coating Licensed Neodymium Permanent Rectangular Tiny Magnets China Supplier

N50 Voice Coil Actuator VCA Neodymium Magnets Technical Specifications:
Item:     MP-NDN50-37
Grade:    N50
Material: Neodymium (NdFeB)
Plating:    Zinc / Nickel
Shape:    Round, Disc, Disk, Circular, Circle
Dimension: Customer Design Drawing
Tolerance: ±0.05 mm
Magnetisation Direction: Axial / Radial
Residual Magnetic Flux Density (Br): 1280-1320 mT (12.8-13.2 kGs)
Energy Density (BH)max: 318-342 KJ/m³ (40-43 MGOe)
Coercivity Force (Hcb): ≥ 915 kA/m ( ≥ 11.5 kOe)
Intrinsic Coercivity Force (Hcj): ≥ 955 kA/m ( ≥ 12 kOe)
Maximum Operation Temperature: 80 °C
Delivery Time: 14-35 days

The VCM voice coil motor is an important part of the AF (Auto Focus) camera module. It can move the lens up and down to switch between near focus and far focus, making pictures clearer. Similar to the principle of the speaker, the magnetic steel provides a permanent magnetic field in the camera module, and the energized coil will be subjected to force in the magnetic field, thereby dragging the lens to move back and forth. Different lenses have different functions, and the shape and performance of the magnetic steel inside are quite different.

Rare Earth magnets are the strongest magnets in the world. These magnets have pulled several times their weight. You receive Shape Disc Quantity 1000 Diameter 1mm (Neodymium Iron Boron)
These incredible magnets are great for anything that you would use Velcro, brass fasteners, hinges, pins, etc.
My clients range from craft companies to hobbyists to painters to carpenters to purse makers. These little magnets have MILLIONS of applications.
WARNING! These magnets should be kept away from any animal or human who might try and eat them, they have the potential to separate and pinch intestines causing serious and life-threatening complications.

The interaction between the magnetic field generated by the permanent magnet and the magnetic field produced by the current flowing through the voice coil creates a force known as Lorentz force. This force acts perpendicular to both the direction of the current and the magnetic field, resulting in a linear or rotational motion of the voice coil, depending on the design of the VCM. VCA Neodymium Magnets

The strength of the magnetic field generated by the permanent magnet is a crucial factor in determining the performance of the VCM. A stronger magnetic field allows for greater force generation and thus enables faster and more precise movements. Therefore, magnets with high magnetic flux density, such as neodymium magnets, are often preferred for VCM applications. VCA Neodymium Magnets Custom Blcok N45H Neodymium Magnets in Auto Focus Camera

Moving magnet VCAs are similar to moving coil VCAs because they have a permanent magnet field in the middle, surrounded by a coil with soft magnetic return path at the outermost diameter. The main difference is what gets attached to the outer soft magnetic return path. In moving coil actuators, the permanent magnet field assembly is attached to the outer soft magnetic return path. This is called the field housing. In moving magnet VCAs, the coil is attached to the outer soft magnetic return path, so now it is in the stationary portion of the actuator, and the permanent magnet field assembly is free to move axially (). Blcok N45SH Magnets in Linear Resonance Actuator

With many moving coil actuators, the designer’s primary concern is keeping the mass of the coil low so it can accelerate quickly; this is where VCAs typically shine. These devices require thermal dissipation management. Design considerations to make the coil assembly lighter tend to be tradeoffs with thermal conductivity. Keep in mind the coil is surrounded by air, which is a poor thermal conductor. In high-duty-cycle applications, standard moving coil VCAs are limited by how much heat they can dissipate. If high performance is a requirement, adjustments need to be made to prevent the coil from overheating. Because moving magnet VCAs have their coils in contact with the stationary outer housing, they expel heat much better. As a result, they are more conducive to high-duty-cycle applications where high accelerations may be less important.