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Kollmorgen MT308B1-E2C1
Kollmorgen MT308B1-E2C1
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EPRO MMS3120/022-000
EPRO MMS3120/022-000

SEM MT30R4-37

Product Name
SEM MT30R4-37 permanent-magnet DC servomotor
Product Introduction
MT30R4-37 is a SEM MT-series permanent-magnet brushed DC servo motor built for industrial motion control. It provides high starting torque, fast response and straightforward armature-voltage control. Depending on feedback options, it is used with DC servo drives, tachometers, resolvers or encoders for position and speed loops.
Category:
Description
Technical Specifications
Parameter​
Value​
Motor type​
Permanent-magnet brushed DC servo motor
Voltage class​
Approximately 140 VDC armature
Maximum speed​
Approximately 3750–3800 rpm depending on configuration
Continuous stall torque, base TENV​
Approximately 28 lb-in, 3.2 Nm
Continuous stall torque, heatsink/blower​
Higher values according to cooling method and MT30R4 duty variant
Peak stall torque​
Approximately 18 Nm short-term for the -37 winding
Armature resistance​
Approximately 0.37 ohm
Armature inductance​
Approximately 3.3 mH
Rotor inertia​
Approximately 0.0020 kg·m²
Rated current reference​
High-current duty variants up to approximately 57 A peak/locked-rotor reference depending on source and cooling
Feedback options​
Tachometer, resolver or incremental encoder
Tachometer option​
Common variants approximately 7 V/1000 rpm; other gradients available by configuration
Thermal class​
F, 155 °C
Protection rating​
IP44 base, IP54 or higher with sealed configuration
Flange / shaft​
Standard MT30 flange, shaft approximately 16 mm diameter in common builds
Construction​
Cast or laminated frame with commutator and brushes
Functional Features
Strong low-speed torque for feed, tension and positioning duties. Simple armature-control interface with standard DC servo amplifiers. Optional tachometer improves speed-loop stability. Resolver or encoder versions provide closed-loop position control. Brush construction allows straightforward maintenance when access is provided.
Performance Parameters
At 140 V armature the motor reaches near 3750–3800 rpm no-load maximum in the -37 winding. Base continuous stall torque around 3.2 Nm supports normal servo duty; heatsink or blower cooling increases sustainable torque. Low armature resistance supports high transient current and rapid acceleration.
Materials And Construction
Permanent-magnet stator using ferrite or rare-earth magnet material according to MT30 variant, laminated armature, copper windings, commutator, carbon brushes, steel shaft and industrial cast or fabricated frame.
Working Principle
DC supply applied to the armature creates current through windings in the fixed magnetic field. Torque is produced proportionally to armature current. The commutator switches current to maintain rotation. Tachometer, resolver or encoder feedback returns speed or position to the servo drive, which adjusts armature voltage and current.
Application Scenarios
CNC machine tools, robotics, converting equipment, textile machinery, material test systems, legacy automation retrofits and precision DC servo axes.
Installation Requirements
Mount on the standard MT flange with proper alignment. Use a DC servo drive matched to 140 V armature and current demand. Install tachometer or encoder alignment according to feedback type. Provide ventilation or heatsink/blower cooling where continuous torque exceeds base TENV values. Ground the motor frame and shield feedback cables.
Usage Notes
Inspect brush wear and commutator condition on a scheduled basis. Avoid prolonged overload above peak stall rating. Confirm tachometer gradient and encoder resolution before drive
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