【The brushless dc motor in the south of anhui 】If known to a sound pressure level of brushless dc motor, is the sound power level values should be? | asynchronous electric

If known to a sound pressure level of brushless dc motor in the south of anhui, is the sound power level values should be? In does not require the setting out of special accurate value for small and medium ac asynchronous motor is commonly used. If the known measuring the sound pressure level of a motor. After add a numeric value. Can be converted to the electric motor and power level values. Different specifications of the brushless dc motor with different numerical. Especially for the frame number in 250 and above the motor, the length of the frame is large, the added value will be a difference. Given in the table below is a general average, only for reference use, note: according to related regulations when the sound pressure level measurement distance,See table below)。 These relationships can be used. Example: the known a stand number is 355 of brushless dc motor, the sound pressure level of numerical measurement is 78 db (A), the value is converted into sound power level is 78 db (一)+ 13. 2 d。 B (A)= 91. 2 db (A)