Simkawa
RME Direct-Drive Torque Motor
By connecting directly to the customer's load, the RME series direct-drive torque motors eliminate the need for intermediate transmission components such as speed reducers or gearboxes, resulting in a compact, reliable, and quiet system.
Furthermore, the integration of a high-resolution rotary encoder significantly enhances the system's overall precision.
Consequently, the RME series offers advantages such as high precision, rapid response, and accurate positioning, making it widely applicable in industries such as inspection and machine tools.
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RME Torque Motor Features
√ Equipped with a high-resolution rotary encoder
√ Large-aperture hollow shaft; customizable to meet customer requirements
√ Stable, reliable structure with high load-bearing capacity
√ Compact design
√ High precision
√ Peak torque: 16.2–496 N·m
√ Continuous torque: 2.6–252 N·m
√ Low torque ripple (less than 0.2%)
√ High repeatability: ±1.5 arc-sec
√ Equipped with Hall sensors
simkawa Torque Motor
Structures of RME Torque Motor
The RME torque motor integrates the rotor, stator, large hollow shaft, high-resolution encoder, and mounting interfaces into a compact rotary drive unit.
Specifications
RME Direct Drive Torque Motor
The RME series is available in multiple frame sizes and torque configurations to meet different load, speed, installation, and positioning requirements.
The product range covers compact precision rotary applications as well as high-load industrial positioning systems. A high-resolution circular encoder and Hall sensors are integrated to support accurate closed-loop motion control.
Main Product Sizes
- RME140 Series
- RME170 Series
- RME263 Series
Dimensions of RME Direct Drive Torque Motor
RME Torque Motor Technical Parameters
| Performance | Unit | RME140-1 | RME140-2 | RME170-1 | RME170-2 | RME170-3 |
|---|---|---|---|---|---|---|
| Peak Torque (1 sec.) | N·m | 15.7 | 27.6 | 72.8 | 125.6 | 178.7 |
| Continuous Torque | N·m | 5.8 | 10.8 | 24 | 42 | 59.7 |
| Max. Speed | rpm | 600 | 350 | 190 | 150 | 120 |
| Electrical | ||||||
| Peak Current (rms) (1s) | A | 7 | 7 | 7.5 | 7.5 | 7.5 |
| Continuous Current (rms) | A | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| Torque Constant | N·m/A | 2.4 | 4.2 | 9.5 | 16.7 | 23.8 |
| Back EMF Constant (L-L) | V/rpm | 2 | 3.4 | 7.8 | 13.6 | 19.4 |
| Resistance @25°C (L-L) | Ohm | 3.7 | 5.9 | 9.4 | 14.4 | 20 |
| Inductance @1kHz (L-L) | mH | 3.8 | 6 | 17.4 | 34.7 | 45 |
| Electrical Time Constant | ms | 1.02 | 1.01 | 1.8 | 2.4 | 2.2 |
| Max. DC BUS | Vdc | 330 | ||||
| Thermal | ||||||
| Max. Coil Temperature | °C | 120 | ||||
| Mechanical | ||||||
| Number of Poles | 28 | 30 | ||||
| Rotor Inertia | kg·m² | 0.0045 | 0.0076 | 0.023 | 0.032 | 0.041 |
| Weight | kg | 3.5 | 5.5 | 10 | 14 | 18 |
| Max. Axial Load | N | 2500 | 15000 | |||
| Resolution | p/rev | 819200 | 1174000 | |||
| Repeatability | arc-sec | ±1.5 | ||||
| Accuracy | arc-sec | ±20 | ||||
| Cooling Type | Natural air-cooling | |||||
Applications of RME Direct Drive Torque Motor
Digital Cutting
Semiconductors
Robotics
Medical and Laboratory Equipment
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