有刷电机的缺点？
缺点 ：电机需要定期维护 ，高速下碳刷摩擦增加，会减少扭矩 。内转子的损坏会导致散热不良 ，转子惯性高限制了电机的动态特性，由于电刷的机械限制，速度范围较低 ，碳刷工作会会产生噪声，导致电磁干扰
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