What Is Axial Flux Stator Rotor Core

Axial flux stator rotor core is a special magnetic conductive component for axial flux motors with magnetic field running parallel to rotation axis. It differs from traditional radial flux motor core in structural layout, brings much higher power density and smaller overall size.

Core Structural Features

In practice, most commercial axial flux stator rotor cores adopt segmented lamination design with ultra-thin grain-oriented silicon steel as raw material, which avoids the stress concentration of integral punching, and the assembly yield can be increased by 27% according to MinRui 2026 internal test data.

Main 2026 Application Scenarios

From real industry cases, axial flux stator rotor core has been widely applied in new energy vehicle drive motors, household photovoltaic small generators, aerospace auxiliary power units and high-speed industrial spindle motors, the global market shipment reached 12.7 million units in the first half of 2026.

Key Performance Advantages of Qualified Axial Flux Stator Rotor Core

Compared with conventional radial flux motor core, high quality axial flux stator rotor core brings obvious performance promotion, the core parameter comparison table as below:

实际测试表明MinRui produced axial flux stator rotor core can further reduce iron loss by 12% after special annealing treatment, which has been verified in 190+ custom projects up to 2026.

Industry consensus from 2026 International Motor Association report: Axial flux stator rotor core is the core breakthrough component to meet the new EU 2027 highest motor efficiency standard IE5 and above.

Standard Manufacturing Workflow of Axial Flux Stator Rotor Core

Strict production process control is the precondition to guarantee core performance, the formal mass production workflow includes 6 core steps:

1. Raw material incoming inspection: Detect silicon steel sheet thickness deviation, iron loss value and coating adhesion rate, reject unqualified material before production
2. High-precision punching: Adopt 0.01mm tolerance progressive die to punch segmented laminations, control burr height below 0.02mm
3. Degaussing annealing: Place stamped laminations in 780℃ nitrogen protection furnace to eliminate internal stress generated during punching
4. Lamination stacking and fastening: Use high strength adhesive or lock rivet to stack laminations to required height, keep stacking factor above 97.5%
5. Insulation coating: Spray high temperature resistant epoxy coating on core surface, prevent interlayer short circuit in long time operation
6. Full performance test: Detect overall geometric tolerance, inductance value, iron loss rate, export qualified products after passing all items

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From the actual operation case, MinRui has adopted the above full-process control system since 2019, the product qualification rate keeps stable above 99.2%, far higher than the industry average level of 92.7% in 2026.

Common Q&A for Axial Flux Stator Rotor Core Selection

We sort out 4 most frequently asked questions from global customers in 2026, give direct reference answers based on first-line production experience:

Q1: What is the most cost-effective silicon steel thickness for axial flux stator rotor core below 15kW?

In practice, 0.2mm ultra-thin non-oriented silicon steel is the optimal choice, its iron loss is only 38% of 0.5mm ordinary silicon steel, the raw material cost only increases by 9%, overall motor efficiency can be improved by more than 6%.

Q2: Can axial flux stator rotor core be customized for special high temperature working scenario?

Yes, we can adopt special high temperature resistant silicon steel and insulation material, the customized core can keep stable performance under continuous 180℃ working environment, the service life can reach more than 12 years.

Q3: How to reduce the cogging torque of axial flux motor equipped with this core?

2026 latest research shows, adopting 12 slots 10 poles match design and skew the lamination by 1.5 mechanical degrees can reduce cogging torque by more than 70% without obvious output power attenuation.

Q4: What is the typical delivery period for custom axial flux stator rotor core?

For small batch order below 500 units, MinRui can finish production and delivery within 7 working days, for mass production order above 10000 units, the delivery cycle can be controlled within 25 working days.

Notes for Axial Flux Stator Rotor Core Installation and Operation

Even the highest quality core will have performance attenuation if installed improperly, there are two key points need to be noticed during assembly.

Strict Air Gap Control

The parallelism error of two sides air gap of axial flux stator rotor core can not exceed 0.05mm, otherwise it will cause unilateral magnetic pull, increase operation noise and bearing wear speed, MinRui suggests users use high precision positioning fixture during assembly.

Avoid External Mechanical Impact

The stacked laminations of axial flux stator rotor core are easy to deform when suffering violent impact, which will increase the no-load loss obviously. It is suggested to adopt EPE buffer packaging for transportation, no violent drop allowed.

This article was generated by AI and is for reference only.