N38SH Micro NdFeB Magnet for Voice Coil Actuators (VCAs)

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N38SH Micro NdFeB Magnet for Voice Coil Actuators (VCAs)  Technical Specifications:
Item:     MP-NDN38SH-44
Grade:    N38SH
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.

In conclusion, magnets play a vital role in the operation of voice coil motors (VCMs). They generate a static magnetic field that interacts with the current flowing through the voice coil, resulting in a force that moves the coil and drives the desired motion of the device. Permanent magnets are typically used due to their strong and persistent magnetic fields. The strength and configuration of these magnets greatly influence the performance and efficiency of VCMs.  High Consistence Bar N54 Neodymium Magnets in VCMs

Composite Rare Earth Magnet
Application Industrial Magnet
Coating Ni,Ni-Cu-Ni,Zn,Ag,Epoxy,etc
Grade N35-N52 (M.H.SH.UH.EH.AH)  Neo Permanent Linear Voice Coil Actuator Magnets N38UH
Size according to client’s request
Material Sintered Neodymium-Iron-Boron
Certification ISO9001:2000,ROHS,SGS,
Magnetism direction Customzied Specific Requirements
Tolerance 0.05mm
port of delivery SHANGHAI/XIAMEN
Model Number neodymium magnet
Shape disc,coin  Linear Resonance Actuator Magnets Permanent N38AH

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

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.  Micro N40SH VCM Voice Coil Motor Magnets

Inquiry for products of ordinary shape
1.Inquiry-Professional quotation, or send inquiry item more details about the materials,grade,size,shape,quantity and coating of magnet.  N48 Voice Coil Actuator Magnets for Medical Devices
2.Confirm the price, lead time, payment term ,trade terms etc. LRA Magnets
3.Tell us the detailed acceptance address,contact person and telephone number.our sales send the Proforma Invoice , or you order online to us.
For the inquiry of products of non-ordinary shape, such as: tile shape, E shape,etc. LRA Magnets
1.Please send us more details about the grade,quantity,coating and the drawing.
2.Confirm the price, lead time, payment term ,trade terms etc.  Permanent Linear Voice Coil Motor Magnets N40UH
3.Tell us the detailed acceptance address,contact person and telephone number.our sales send the Proforma Invoice , or you order online to us.