VCM Magnets

neodymium (rare earth) magnets are widely used for motors, one of them is voice coil motors, especially in disk voice coil motors.

Voice Coil Motors (VCM), also called Voice Coil Actuators (VCA), are a very mature design that utilizes a magnet and yoke in conjunction with a coil. 

The coil and magnet area concentric about a common axis and there exists an engineered magnetic return path.

The coil is typically connected to a mechanism which translates the coil’s linear motion into a beneficial action. 

For example, a conventional loud-speaker uses a voice coil motor to drive a cone which converts the coil’s oscillating motion into sound energy.

VCM Magnets

Key Benefits of a VCM – Voice Coil Actuator:

• No commutation required
• Low to no hysteresis
• Zero cogging
• Fewer mechanical components compared to “screw-type” actuators
• Linear control characteristics
• High power to mass ratio
• High power to volume ratio
• Infinite position (Limited only by the encoder device.)
• High acceleration

Similar Products / Design:

• Moving Magnet  – Voice Coil Motor
• Rotary – Voice Coil Motor

Example Applications:

• Shakers – Vibrators
• Lens focusing
• Servo valves
• Positioning Stages
• Speakers

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Introduction of Great Magtechc Electric:

Advantages of GME arc electromagnet

1. High Grade / High performance:

GME highest grade: N54, 52M, 50H, 48SH, 42UH, 38EH, 33AH, etc.

2. High Consistency: 

The Cpk of Remanence (Br) and Intrinsic Coercive Force (Hcj) are much higher than 1.67. The consistency of 

the surface magnetic field and magnetic flux can be controlled at +/-1%.

3. High Working Temperature:

GME arc electromagnet can satisfy the working temperature requirements with excellent temperature resistance.

The AH series with 40 kOe super-high coercive force can replace Smco magnets in most applications.

4. Low Weight loss:

GME super-high arc electromagnet have a long lifetime with the following specifications; PCT: 130C，humidity 100%，

vapor pressure 2.7bar, 20days，average low weight loss <2 mg/cm².

5. High anti-corrosion:

 coating Nickel-Copper-Epoxy is typically more than 1000 hours.

VCM Magnets Manufacturing Processes:

VCM Magnets main manfucturing equipments:

How we test our VCM Magnets:

How we pack strong VCM Magnetst

Our VCM Magnets are certificated by CE, Rosh....

We would love to see how you have used our arc neodymium magnets

Simply send us a photo of your arc neodymium magnets in use and if we use it on our website we will return you $10 next order (Amount more than $1000).

WARNING: Persons who are pregnant, wearing pacemakers, pacemaker defibrillators, insulin pumps, or electric insulin devices, should not use magnetic products.