The MI-F 250 torque motor is engineered for high-torque, industrial-grade applications – from machine tools to heavy automation. It’s designed for demanding environments where maximum performance, reliability, and dynamic behavior are essential.
Now available as a PMSM combined motor system, the MI-F 250 offers extreme torque performance.
Stack up to five units and achieve 520 Nm continuous torque and 1529 Nm peak – all within a direct-drive, frameless solution.
Types
Extreme Torque Output
Industrial-Grade Power
Zero Backlash Drive
Modular Integration
About the MI-F 250
The MI-F 250 is suitable for applications like rotary tables, test benches, spindles, and heavy-duty actuators. The combined configuration boosts torque dramatically, while keeping the system compact.
By eliminating gearboxes and belts, you reduce noise, energy loss, and maintenance – while gaining responsiveness and control precision.
Each MI-F 250 consists of:
• Stator (stationary): Houses the windings and generates torque-driving fields.
• Rotor (moving): Contains strong permanent magnets that deliver smooth, consistent motion.
What benefits does combining PMSM Torque Motors have?
By mounting two or more MI-F 250 motors in series within a single housing, you can achieve high torque output in a compact volume – unlocking performance potential beyond single units.
You maintain the simplicity of one inverter, a single motor shaft, and full control over performance – while preserving direct-drive dynamics such as fast response, high control accuracy, and minimal mechanical wear. The 250 combined torque motor series delivers industrial-grade performance for heavy-duty applications.
The MI-F 250 torque motor is the largest model in the standard MI-F range available for combined (stacked) configurations. By stacking multiple motors, you significantly increase torque without backlash. This results in improved precision, quieter operation, and lower lifetime costs.
When stacked with five motors and actively cooled, the MI-F 250 offers up to 520 Nm continuous torque and 1529 Nm peak . It’s built for demanding applications – where performance and reliability are non-negotiable.
Motor Specifics
| Property | Value |
|---|---|
| Motor Type | MI-F 250-75 |
| Outer Diameter (1 motor) | 250 mm |
| Length (1 motor) | 75 mm |
| Possible Stack Configuration | 2 to 5 motors combined |
| Sensor Support | PT1000 (optional) |
| Rotor Type | Outrunner |
Electrical & Mechanical Performance
| Number of Combined Motors | 2 | 3 | 4 | 5 |
| Continuous Torque (no cooling) | 187 Nm | 266 Nm | 337 Nm | 400 Nm |
| Max Speed (no cooling) | 335 rpm | 220 rpm | 165 rpm | 130 rpm |
| Continuous Torque (forced air) | 243 Nm | 346 Nm | 438 Nm | 520 Nm |
| Max Speed (forced air) | 335 rpm | 220 rpm | 165 rpm | 130 rpm |
| Peak Torque | 640 Nm | 945 Nm | 1241 Nm | 1529 Nm |
| Pole Pairs | 16 | 16 | 16 | 16 |
| Bus Voltage | 600 V DC | 600 V DC | 600 V DC | 600 V DC |
The following values are indicative numbers and have to be specified in more detail with the customer based on its actual construction. Peak torques are only applicable for short durations and should be discussed in detail to match specific application requirements.
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the support team
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