Function description, Structure, Servo amplifier – Pilz Cable PMCprimoDrive>Mod-Profibus:L=0,45m User Manual
Page 17
Operating Manual: PMCtendo AC
4-1
Function Description
Structure
PMCtendo AC servo motors are 3-phase, brushless synchronous motors with
permanently energised rotor. The rotor contains rare earth permanent magnets made of
neodymium iron boron. The rare earth magnetic material is a major factor in enabling
these servo motors to be operated with high dynamics.
The 3-phase, stator winding is designed for sinusoidal commutation and enables a high
efficiency factor, while at the same time having optimum true running characteristics.
PMCtendo AC servo motors are totally enclosed, self-cooled motors and correspond to
type IC410 (in accordance with IEC 60034-6).
Servo amplifier
A suitable servo amplifier is required for commutation (e.g. PMCtendo DD, PMCprimo
Drive from Pilz). Commutation occurs electronically within the servo amplifier.
The servo motor and servo amplifier should always be regarded as one cohesive
system. The most important selection criteria are:
• Constant standstill torque M
0
[Nm]
• Constant standstill current I
0
[A]
• Rated speed n
N
[min-1]
• Mass moment of inertia of motor and load J [kgcm²]
• Effective torque (calculated) M
rms
[Nm]
• Regenerative energy in braking mode
When selecting the servo amplifier, please consider both the static and the dynamic
load (acceleration/braking).