It usually appears at the RF, blade passage frequency and commutator brush frequency, and their higher harmonics.
它通常出现在射频，叶片通过频率和整流子刷频率，其高次谐波。
Replacement brush: brush wear should not be used to change immediately, otherwise damage the commutator, more easily cause serious electrical burn.
调换电刷：电刷磨损到不能使用时应立即调换，否则会损坏换向器，严重时更容易导致烧坏电机。
The no-brush direct current electromotor is a kind of direct current electromotor without any mechanical commutator or brush.
无刷直流电机是一种没有机械换向器和电刷的直流电机。
Repair or replace the electric brush; clean the commutator surface by abrasive paper and blow it clean.
修理或调换电刷，用木砂纸清理整流子表面，并吹净。
Operation (1) Adjust the brush and the collector ring (commutator) before the operation and keep good contact.
操作使用1、使用前调整电刷与集流环(换方器)，使之接触良好。
Operation (1) Adjust the brush and the collector ring (commutator) before the operation and keep good contact.
操作使用1、使用前调整电刷与集流环(换方器)，使之接触良好。
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