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[Did You Know About Cooling?] What are the technical specifications for DC fan technology?

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Release time:

2019-07-22

1. Fan testing method:
1.1 Current: The current is measured after the device has been rotating continuously for 3 minutes.
1.2 Rotational Speed: The rate is measured after continuous rotation for 3 minutes.
1.3 Starting Voltage: The voltage required to start the fan operating after the “ON” switch is turned on.
1.4 Input Power: The input power is measured after continuous rotation for 3 minutes.
1.5 Locking Current: For fans that can be locked, the locking current is measured in fresh air for a 3-minute lock period.
1.6 Airflow data and pressure data shall be measured according to the “AMCA Standard” or DIN 24163 regulations. This data measurement shall be conducted in a dual-pressure chamber, and the pressure data exerted on each side of the pressure chamber must be recorded.
1.7 Noise Standards: The noise standard test is conducted in accordance with DIN 45635, and measurements are taken in a soundproof room with the microphone positioned one meter away from the fan.
2. Fan protection test:
 
2.1. Rotational Locking Protection
2.1.1 Several fan blades are connected and fixed together, restricting their rotation. If the fan and electronic components remain undamaged, loosening the component that restricts rotation will allow the fan to automatically resume spinning.
2.1.2 For small-current fans or fans equipped with an auto-start function, when the fan is powered on and rotating, its fan blades will be locked. After 72 hours of continuous operation, release the locked blades, and the fan will immediately restart automatically, indicating that the fan is functioning normally.
2.1.3 Fans with high current or without the Auto-start function must not be locked for extended periods; otherwise, the fan may overheat and get damaged.
 
2.2 Polarity Protection
Under normal voltage conditions, if the power supply is connected in reverse to the fan for 15 minutes and then disconnected, and subsequently reconnected with the correct polarity, all functions will operate normally.
 
2.3. Free Drop
The monomer was dropped from a height of 600 mm onto a 30-mm-thick wooden board. Any one of the six surfaces and any corner of the fan passed the drop test without sustaining any damage.
 
2.4. Insulation Impedance
Under 500V DC conditions, the resistance between the outer frame and the positive terminal of the wire shall be no less than 10 MΩ.
 
2.5. Insulation Strength
Under a leakage current of 5mA and an AC voltage of 500V for 60 seconds, the fan frame and wires showed no abnormalities, confirming good insulation.
 
The above is a brief introduction to the technical specifications for DC fans. Shenzhen Jiangshanlai Electronic Technology Co., Ltd. is a company specializing in DC brushless motors, DC cooling fan We are a large-scale enterprise integrating the customization, R&D, manufacturing, sales, and service of DC brushless fans, DC stand fans, boosted cooling fans, miniature cooling fans, DC cooling fans, DC blowers, and non-standard fans. We are a wholesale manufacturer and supplier of DC fans. Our products are best-selling in Guangdong Province—specifically in Shenzhen, Guangzhou, Dongguan—as well as in Fujian, Zhejiang, and Jiangsu provinces.
If you have any needs, feel free to consult us.

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