Electrical performance test of cooling fan ?
cooling fan FAN main test items include: current, blind spots, strange sound, jitter, rotation speed, wind speed, burner, whether the appearance is consistent with the coil label.
instruments used: DC power supply , tachometer, anemometer , constant temperature box , caliper, etc.
1. The cooling fan test FAN blind spots are divided into real blind spots and fake dead corners. Real dead corners cannot be controlled, while fake dead corners can be accepted.
true blind spot: Press the blade with your hand and reverse it for 1-2 turns, slowly let go, that is, the FAN stops rotating or shakes continuously at this fixed point, turn off the DC power supply, turn on the power supply again, and the FAN still stops and does not rotate. This phenomenon is called a true blind spot.
false dead corner: Press the blade with your hand and reverse it for 1-2 turns, slowly let go, that is, the FAN stops rotating or shakes continuously at this fixed point, turn off the DC power supply, turn on the power supply again, and the FAN is still operating normally. This phenomenon is called false dead corner.
2. The maximum starting voltage of the cooling fan FAN cannot exceed 6V starting voltage: it refers to the minimum voltage value that can start the fan after the fan is suddenly powered on.
3. Unit of speed: RPM Unit of wind speed: m/s When measuring the FAN wind speed and speed of the cooling fan, it must be based on 3 minutes and take its accurate value.
4. The temperature of the burner is 45℃, the time is 30 minutes, and there should be no oil spill at the bottom or on the fan blade.
5. The average life of the fan continuously operating at the rated voltage: oily (sleeve): about 26,000 hours. Single ball and sleep. It is about 40,000 hours. Double ball and two balls are about 50,000 hours.
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