The high speed of the AC universal motor is not necessarily a good thing. High speed will increase the wear of the universal motor, but also cause the electric momentum is too large, once the electric momentum exceeds the rated voltage value will damage the motor insulation.
Regular motor manufacturers in the production of the motor, will limit the maximum speed, so as to ensure that the motor can output the maximum power, but also take into account the principle of reliability and durability.
Therefore, the higher the motor speed is not the better, if a wall-breaking machine product blindly pursues high speed, it means that it may be at the cost of reliability and durability.
