Fagor FXM1 Series, Руководство по установке

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   General concepts
GENERAL CONC
E
PTS
Ele
ctrical
con
cepts
1.
Ref.2105
· 19 ·
FXM|FKM
SERVOMOTOR
Definitions
We now define the electromechanical terminology for servomotors used in
the previous section.
where:
where:
Stall torque (Mo) Max. torque that the motor can supply when the rotor is locked and is
thermally limited by the temperature increase at the stator winding (

T=100
K). This torque is available for a zero motor turning speed for an unlimited
time period. The stall torque M0 is always greater than the rated torque Mn.
Stall current (Io) Current circulating through each phase of the stator winding required to
generated the stall torque. This current can circulate for an unlimited time.
Rated torque (Mn) Torque that the motor can supply continuously at its rated speed thermally
limited by the temperature increase at the stator winding (

T=100 K).
Rated current (In) Current circulating through each phase of the stator winding required to
generated the rated torque Mn.
Rated power (Pn) Power available at rated speed and rated torque. Its value is given by the
expression:
Pn
Mn
n
N

9550
------------------- =
Max. speed (Nmax) Rotor turning speed limitation due to electrical restrictions. Note that the
maximum value of this speed is shown in the graphs given in this manual.
Peak torque (Mp) Maximum torque (limited by current). It is available for dynamic operations
such as accelerations, etc. The value of this current is always limited by the
drive control parameter ·CP20· in face of the risk of exceeding the
destruction temperature of the insulation of the stator winding.
Acceleration time (tac)
without inertia on the axis
Time it takes the motor to accelerate from rest state to its rated speed with
maximum torque.
Torque constant (Kt) Torque generated according to the current supplied. Its value may be
calculated with the division of the stall torque by the stall current (Mo/Io).
Kt
Torque constant in N·m/A
Mo
Stall torque in N·m
Io Stall current in A
Kt M0 I0

=
Calculating power (Pcal)
Power value given by the expression:
Pcal Calculating power in kW
Mo Stall torque in N·m
Nn Motor rated speed in rev/min
Pcal
M0 Nn

9550
-------------------- =
Resistance of the stator
winding (R) Value of the resistance of a phase at an ambient temperature of 20°C/68°F.
The stator winding has a star configuration.
Inductance of the stator
winding (L) Value of the inductance corresponding to a phase when using three-phase
power supply. The stator winding has a star (Y) configuration.