Positioning Systems - Romicon

Positioning Systems
Linear Motor Components
4.3 Linear Motors, LMT Series
HIWIN synchronous LMT linear motors are iron-core motors with similar properties
to the motors of the LMS series. Thanks to the special arrangement of the forcer
between two stators, the attraction force in the LMT forcers is cancelled. As a result,
the linear guideways are especially relieved of loads and a high power density is
achieved with relatively short gliders.
Notes:
Exceptionally high continuous force
Water cooling possible
Magnetic force compensation
No introduction of magnetic force into the guide elements
Several forcers possible on one stator
Any length stroke
Table 4.3 Specifications for Linear Motors of the LMT Series
Symbol Unit LMT37 LMT37 (WC) 2) LMT37L LMT37L (WC) 2)
Peak force (1 s) F p N 2500 2500 2500 2500
Continuous force (at 80 °C) F c N 950 1600 950 1600
Peak current (1 s) I p A(rms) 10,5 10,5 21,0 21,0
Continuous force (at 80 °C) I c A(rms) 3,5 6,0 7,0 12,0
Force constant K f N/A (rms) 271 271 136 136
Attractive force F a N 0 1) 0 1) 0 1) 0 1)
Max. winding temperature T max °C 100 100 100 100
Electric time constant K e ms 9,6 9,6 9,6 9,6
Resistance (per phase at 25 °C) R 25 � 9,0 9 2,3 2,3
Inductance (per phase) L mH 86 86 22 22
Pole pitch 2 � mm 32 32 32 32
Bending radius of motor cable R bend mm 37,5 37,5 37,5 37,5
Back EMF constant K v Vrms(m/s) 141 141 71 71
Motor constant (at 25°C) K m N/� W 54,1 54,1 54,1 54,1
Thermal resistance R th °C/W 0,23 0,23 0,23 0,23
Thermal circuit breakers 100 °C, bimetal (opener), DC 12 V/6 A, DC 24 V/3 A
Max. DC-bus voltage V 750
Number of phases � � 3 3 3 3
Mass of forcer M f kg 14,0 14,0 14,0 14,0
Own mass of stator M s kg/m 16,4 16,4 16,4 16,4
Width of stator W s mm 100 100 100 100
Length of stator / Dimension N L s mm 192 mm/N=2, 256 mm/N=3, 320 mm/N=4, 384 mm/N=5, 448 mm/N=6, 512 mm/N=7
Distance between fixing holes for stator A s mm 85 85 85 85
Height of total system H mm 131,5 131,5 131,5 131,5
1) 0 = Corrected by identical attractive forces
2) WC = with water cooling
Values in the table apply to operation without forced cooling; exception: linear motors marked with (WC)