There are some differences in the performance of aluminum alloy and composite shaded pole motor blades. The following are common differences:

1. Strength and stiffness: Composite materials generally have higher strength and stiffness and can withstand larger loads and vibrations. In contrast, aluminum alloys have lower strength and stiffness, but still have better performance.

2. Corrosion resistance: Aluminum alloys have better corrosion resistance and can resist some common corrosive media. Composite materials generally also have good corrosion resistance, but additional protective measures may be required in specific corrosive environments.

3. Heat dissipation performance: Aluminum alloys have good thermal conductivity and can effectively dissipate heat, which is suitable for applications with high heat generation. Composite materials have relatively low thermal conductivity and may not be as effective in heat dissipation as aluminum alloys.

4. Weight: Composite materials are generally lighter than aluminum alloys because they are composed of lightweight fiber materials (such as glass fiber, carbon fiber) and a resin matrix. Lower weight helps reduce motor load and improve overall efficiency.

5. Fatigue resistance: Composite materials generally have better fatigue resistance and can withstand long-term vibration and stress cycles without fatigue. Aluminum alloys have relatively low fatigue resistance.

It should be noted that the specific performance differences are also affected by factors such as material composition, manufacturing process and design requirements. When selecting aluminum alloy or composite shaded pole motor blades, the requirements of the specific application should be considered comprehensively to select the most suitable material to ensure that the blades have good performance and reliability.