Parker NX Series, Техническое руководство

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15 - PVD 3663_GB_NX_March 2017.Docx
Selection of the motor :
The motor adapted to the duty cycle has to provide the rms torque M
rms
at the rms
speed(*) without extra heating. This means that the permanent torque M
n
available at
the average speed presents a sufficient margin regarding the rms torque M
rms .
(*) rms speed is calculated thanks to the same formula as that used for the rms torque.
The mean speed cannot be used (in general mean speed is equal to zero).
Only use the rms speed.
Furthermore, each Mi and speed
associated Ωi of the duty cycle has to be located in
the operational area of the torque vs speed curve.
Torque
M
k
M
rms .
M
n
M
i
Ωi Ωk Ω
rms
Ωn
Speed


   
n
i
i i rms
t
T
1
2
*
1