What core materials are suitable for high-speed stepper motors?

In summary, when choosing a core material for a stepper motor, it is important to consider its response time and efficiency at high frequency harmonics. Insulated laminations or iron/ferrite powder material in an insulating binder are recommended for faster magnetic diffusion. Solid iron cores may have slower response times due to the skin effect.
  • #1
me_dexter
2
0
I want to make a stepper Motor. How to find the suitable core material.
Can I use Annealed iron as core for stepper Motor?
Will Eddy current loss will be more in it ?
Is there any way to calculate diff core losses of diff material
https://en.m.wikipedia.org/wiki/Magnetic_core
Saw the following wiki page of magnetic core material with list
 
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  • #2
The stepper motor will be switching fast and so the core must respond quickly. The rectangular waves used to control stepper motors have high frequency harmonics. The core must work efficiently at those harmonic frequencies.

Your core must have thin insulated laminations or an iron or ferrite powder material in an insulating binder. The magnetic field can then travel quickly through the core insulation to reach all the magnetic material.

The problem with solid iron cores is that the speed of magnetic diffusion through conductive material is very slow, probably about one hundred metres per second. Skin effect applies in magnetic cores as well as to currents in wires.
 

Related to What core materials are suitable for high-speed stepper motors?

1. What is the purpose of stepper motor core material?

The core material in a stepper motor is responsible for providing magnetic flux to the motor, which is necessary for its operation. It helps to convert electrical energy into mechanical energy, allowing the motor to rotate in a precise and controlled manner.

2. What are the different types of core materials used in stepper motors?

The most commonly used core materials in stepper motors are laminated silicon steel, iron powder, and ferrite. Each material has its own unique properties and is chosen based on the specific requirements of the motor.

3. How does the choice of core material affect the performance of a stepper motor?

The choice of core material can greatly impact the performance of a stepper motor. For example, laminated silicon steel offers high magnetic permeability and low core losses, making it ideal for high-speed applications. Iron powder cores have low hysteresis losses and are better suited for low-speed and high-torque applications.

4. What factors should be considered when selecting a core material for a stepper motor?

When selecting a core material for a stepper motor, factors such as operating speed, torque requirements, and cost must be taken into consideration. Other important factors include the size and weight of the motor, as well as its intended use and environment.

5. Can different core materials be used in the same stepper motor?

Yes, it is possible to use different core materials in the same stepper motor. This can be done by using a hybrid core, which combines the advantages of different materials to optimize the motor's performance. However, this may increase the complexity and cost of the motor.

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