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Geared torque motors
Short movement with stop position
SEW torque motors are AC squirrel-cage motors designed to
operate with rated torque at a standstill (starting torque).
They are equivalent to springs with an unlimited spring
travel.
Geared torque motors move flaps, gates, or switches. They
move press dies into die change position. In all these cases, they serve as a drive in which a stop position must
be reached and held following a short movement. While under
voltage, they can also have their speed matched temporarily
by another drive and then continue running under their own
force.
Supply voltages and enclosures for SEW torque motors
correspond to those of SEW AC motors.
The electrical version enables the torque motor to
continuously operate with the permitted starting torque in
rating I irrespective of the starting frequency.
The attainable starting torque is tripled when the torque
motors are operated with rating II. This operation is either
only permitted for short intervals (operating mode S3/15%
cdf) or continuously with forced cooling of the torque
motors.
The dimensions of the MT/MV torque motors are identical to
those of DT/DV AC motors of the same size (see also the
"Gearmotors" catalog).
Torque gearmotors are assembled using a modular concept just
like gearmotors. Since torque motors develop less torque in
comparison to AC squirrel-cage motors of the same design due
to thermal conditions, there is a greater range of possible
combinations with gear units.
Torque motors 750 rpm 50 Hz
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Rating I for continuous duty S1
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Rating II for intermittent
operation S3/15% cdf or continuous duty with
forced cooling fan
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Only for gear unit mounting
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Torque motors 900 rpm 60 Hz
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Rating I for continuous duty S1
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Rating II for intermittent
operation S3/15% cdf or continuous duty with
forced cooling fan
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Only for gear unit mounting
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