I have a question... For example, I usually have a DC 12V 0.16A motor, but can I run this motor with a 3v battery..?? It is.. The front specifications are specifications for the cooling fan, but they actually rotate even with a 1.5V battery... The specifications are written for each motor... Is this the right thing to say... It's the best, but less than that is okay... I'm curious ...
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It depends on the motor. In the case of general brush motors, they operate at considerably lower voltages. In the case of a 12V DC motor, it rotates very slowly even if it is over 1V.
However, cooling fans, etc., have semiconductors inside. So, it does not operate at about 1V like a normal DC motor, and it operates only when it is at least about 4~5V. It is difficult to confirm whether it will run at 3V without directly experimenting because the minimum operating voltage is different for each product.
The voltage written on the motor is considered to be the highest efficiency at that voltage.
Even if it is lower than that, it rotates, and even if it is slightly higher than that, it operates without problems, but the efficiency is lowered and the life span may be reduced. (when voltage rises)