fan motor iron core thickness

Impact of Iron Core Thickness on Fan Motor Performance

When it comes to the performance of fan motors, one crucial factor often overlooked is the thickness of the iron core. The thickness of the iron core plays a significant role in determining the motor’s power, efficiency, and noise levels. In this blog post, we’ll delve into why the lamination core is essential, how its thickness affects motor performance, and how to choose the right thickness for optimal results.

Why Motors Need Iron Cores?

The motor lamination core is a vital component responsible for magnetism conduction. As current passes through the stator winding, the iron core magnetizes, creating a magnetic field around it. This magnetic field interacts with the surrounding gas or liquid, generating force that drives the motor’s rotation.

Influence of Iron Core Thickness on Motor Performance

The thickness of the iron core is a critical factor influencing motor performance, directly affecting power, efficiency, and noise levels.

influence of iron core thickness on motor performance


When designing a motor, the thickness of the iron core and the number of winding turns influence the motor’s output power. If the iron core is too thin, it may not conduct magnetism efficiently, leading to insufficient magnetic flux density and a decrease in output power.

Conversely, an excessively thick iron core can result in longer magnetic flux paths, causing magnetic hysteresis losses and reducing efficiency, thus lowering the output power.


Iron core thickness also impacts motor efficiency. Matching the thickness of the iron core with the number of winding turns appropriately can enhance motor efficiency. An overly thick iron core can lead to excessive magnetizing current, increasing various current losses and thereby reducing motor efficiency.


Inappropriate iron core thickness can contribute to increased motor noise. A too-thin iron core with insufficient output power may require a larger current to maintain normal operation, resulting in noise. Conversely, an excessively thick iron core can lead to magnetic hysteresis, causing vibration and noise.

Choosing the Right Iron Core Thickness

Selecting the appropriate iron core thickness is crucial for meeting the requirements of motor output power, speed, efficiency, and noise levels. Generally, a moderately thick iron core performs optimally.

To achieve better performance while ensuring magnetic conduction capability, optimization measures such as using suitable ferromagnetic materials and improving winding forms can be implemented.


In conclusion, the thickness of the iron core significantly influences the performance of fan motors, correlating closely with factors such as power, efficiency, and noise levels. Choosing the right thickness of the iron core is essential for achieving optimal motor performance.

By carefully considering the motor’s requirements and implementing appropriate optimization measures, manufacturers can ensure that their fan motors operate at peak efficiency and minimal noise levels, ultimately enhancing user satisfaction and product reliability.

Lamnow Manufacture Motor Lamination Stacks Of Various Thicknesses

lamination manufacturing capabilities

At Lamnow, we offer 0.1 mm – 1 mm thickness electrical steel laminations and 25-micron amorphous motor laminations. Laser cutting and wire cutting can accurately cut a variety of motor stator and rotor laminates, which can ensure the quality of prototype laminates.

With ten years of experience in motor lamination manufacturing, our engineers can provide customers with a full range of solutions. Whether it is a fan motor lamination, pump motor lamination, drone motor lamination, electric vehicle motor lamination, elevator traction motor lamination, power tool motor lamination, or washing machine motor lamination, our high-speed stamping equipment and stamping die can meet your mass production needs.

In addition, we offer to bond varnish to stacking lamination, stator copper coil winding, epoxy power insulation, and injection molding insulation process.

If you have motor lamination needs and questions, you can contact us, we will provide you with patient answers!


What is the typical thickness range of iron core laminations in household appliance motors?

In household appliance motors, the typical thickness range of iron core laminations for both stator and rotor varies from approximately 0.2 to 1.25 millimeters. These thin laminations are crucial for reducing eddy current losses and improving the efficiency of the motor by providing a path of lower resistance for magnetic flux.

Why are stator and rotor core laminations necessary in motors?

Stator and rotor lamination cores are essential in motors for several reasons. They help reduce eddy current losses, enhance magnetic flux conduction, and improve overall motor efficiency. Additionally, these laminated cores provide structural support, ensuring the stability and longevity of the motor during operation.

What are the common types of fan motors?

The common types of fan motors include:

Single-Phase Induction Motors: Widely used in household fans, single-phase induction motors are reliable and cost-effective. They operate on single-phase AC power and typically have simple construction.

Shaded-Pole Motors: Shaded-pole motors are simple and inexpensive, often found in small fans and appliances. They operate using electromagnetic induction and are known for their low starting torque and moderate efficiency.

Permanent Magnet Motors: These motors use permanent magnets to create a magnetic field instead of relying solely on induced currents. Permanent magnet motors are known for their efficiency and compact size, making them suitable for applications where space is limited.

Brushless DC (BLDC) Motors: BLDC fan motors offer high efficiency, low maintenance, and precise speed control. They use electronic commutation instead of brushes, making them suitable for applications requiring variable speed control and quiet operation.

ECM (Electronically Commutated Motor) Motors: ECM motors are highly efficient and offer variable speed control. They use electronic controls to adjust the motor speed based on demand, resulting in energy savings and improved performance.

Three-Phase Induction Motors: Typically used in industrial and commercial settings, three-phase induction motors offer high efficiency and reliability. They require a three-phase power supply and are suitable for high-power applications such as large ventilation systems and HVAC units.

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To learn more about our motor lamination manufacturing capabilities for your industry, contact our team today.