The difference between brush and brushless DC fan is mainly in principle, the performance is superior, the specific differences are as follows: 1; A commutator need to use a brush for electrical coupling, a no brush, commutation by electronic circuit. The former because of the mechanical commutator wear failure rate is high, the latter overload capacity is poor. 2. DC Fan brush motor is usually series motor, brushless motor is generally squirrel cage asynchronous motor. 3. brushless long service life, usually in the service life of tens of thousands of hours, because of the bearing different brushless, service life is not the same. DC Fan brush is a traditional product, in the performance aspect will be relatively stable, DC fan brush is an upgraded product, in the life aspect will be better than brushless, but the long life control circuit will be more prone to problems Therefore, the choice of brushless must go through strict testing to ensure the quality of products.

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