UH CORES

In modern electric motor manufacturing, the performance of core lamination structures plays a decisive role in determining efficiency, torque stability, vibration level, and overall energy consumption. The UH series motor core laminations (UH-1, UH-2, UH-3, UH-4) are designed with highly controlled dimensional tolerances and optimized air gap structures to meet the demanding requirements of industrial-grade motors.

These components are widely used in household appliances, industrial motors, and high-precision electromechanical systems where stable magnetic performance and consistent air gap control are critical.

Importance of Air Gap Control in Motor Performance

The air gap between the stator and rotor is one of the most sensitive parameters in motor design. Even minor deviations can significantly affect:

• Magnetic flux distribution

• Torque output stability

• Energy efficiency

• Noise and vibration levels

• Motor heating performance

The UH series is engineered with strict air gap tolerance control before and after coating (painting), ensuring stable performance even after surface treatment processes.

UH-1 Series: High-Precision Compact Structure

The UH-1 model is designed for compact motor applications requiring tight dimensional control.

Key Characteristics:

• Air gap options: 3.5mm and 2.8mm (before and after painting)

• High precision tolerance: ±0.2mm across key dimensions

• Stable structural geometry for consistent magnetic alignment

Engineering Advantage:

UH-1 ensures minimal deviation after coating, maintaining reliable air gap consistency for long-term motor stability.

UH-2 Series: Reinforced Structural Design

The UH-2 series is developed for motors requiring higher mechanical strength and larger structural dimensions.

Key Specifications:

• A: 39.8 ±0.6

• B: 16.8 ±0.4

• C: 7.8 ±0.2

• D (Air Gap): 11.0 ±0.2

• E: 28.2 ±0.5

• F: 5.2 ±0.3

Application Advantage:

UH-2 is suitable for medium-to-high power motors where structural rigidity and dimensional stability are essential.

UH-3 Series: Optimized Lightweight Efficiency Design

The UH-3 model focuses on balancing lightweight structure with high electromagnetic efficiency.

Key Parameters:

2.5 Air Gap Before Painting:

• A: 12.8 ±0.3

• A1: 15.6 ±0.3

• B: 13.8 ±0.3

• C: 4.05 ±0.2

• D: 2.55 ±0.2

• E: 8.4 ±0.2

• F: 7.6 ±0.2

• Weight: 2.0

After Painting Adjustments:

• Improved dimensional stability with controlled tolerance shift

• Optimized minimum and maximum limits for consistency

Application Value:

UH-3 is widely used in precision motor systems requiring lightweight structure and stable electromagnetic performance.

UH-4 Series: High-Strength Industrial Grade Design

The UH-4 series is engineered for heavy-duty industrial motor applications requiring higher load resistance and structural reinforcement.

Key Parameters:

2.8 Air Gap Before Painting:

• A: 14.8 ±0.3

• A1: 9.5 ±0.3

• B: 3.6 ±0.2

• C: 14.3 ±0.3

• D: 3.55 ±0.2

• E: 2.9 ±0.2

• F: 2.0 ±0.2

• Weight: 3.6

Engineering Advantage:

UH-4 offers improved mechanical stability and enhanced durability under high-load motor operating conditions.

Before vs After Painting: Why It Matters

All UH series components are evaluated under both pre-coating and post-coating conditions. This ensures:

• Dimensional stability after surface treatment

• Controlled expansion or contraction tolerance

• Consistent air gap performance

• Reduced electromagnetic fluctuation risk

This level of precision is essential for mass production of high-efficiency motors.

Manufacturing and Quality Control Standards

To ensure consistent performance across all UH series models, strict quality control processes are applied:

• Precision stamping and lamination forming

• CNC-based dimensional inspection

• Air gap consistency testing

• Coating thickness impact evaluation

• Full batch tolerance verification

Each batch is engineered to meet industrial-grade reliability standards.

Application Fields

UH series motor core laminations are widely used in:

• Household appliance motors

• Industrial electric motors

• HVAC motor systems

• Pump and compressor motors

• High-efficiency energy-saving motors

Their stable air gap design ensures reliable operation across different working environments.

Conclusion

The UH-1, UH-2, UH-3, and UH-4 motor core lamination series represent a highly engineered solution for precise air gap control and structural stability in modern motor design.

By maintaining strict dimensional accuracy before and after coating processes, these components ensure superior motor efficiency, reduced vibration, and long-term operational reliability.

For manufacturers seeking high-performance motor core solutions, the UH series provides a balanced combination of precision engineering, durability, and scalable industrial application potential.