The MI-F 40 series motors have an outer diameter of 40 mm (1.57 inches). They offer peak torque values ranging from 0.97 Nm to 2.95 Nm.
What are Frameless
Frameless motors are a type of electric motor with a toroid shaped motor which can directly drive the application without additional mechanics, like worm wheels, belts, or pulleys. They are also called direct drive motors.
A frameless motor consists solely of the stator (stationary part) and rotor (moving part). Magnetic Innovations has two Framless Torque Motors Series that are designed to be built in the integral part of a system. With their outrunner or inrunner frameless design, size and weight are decreased, making the motors easy to integrate and use in various applications.
What does frameless torque motor mean?
Frameless refers to a motor without a frame, housing, bearing or feedback system. As a result, system suppliers are capable of optimizing the motor according to their application and reduce the cost of ownership.
The frameless torque motors consist of two parts. The armature assembly (stator) with windings and the rotor assembly carrying the magnets that produce torque, both integrated into a customer specific application. A major advantage is the freedom in design and choice of bearings, shaft, housing and sensors that are required for the application.
High torque
Because of their shape, frameless torque motors are able to generate a lot of torque, but relatively little RPM compared to conventional servomotors. The latter can reach a much higher RPM, but generate less torque. To reach the desired speed to torque ratio, a coneventional servo motor is therefore often fitted with a gearbox. This gearing reduces the efficiency and accuracy.
In addition, because of the high specific torque density, frameless torque motors are very suitable for small building volumes.
Frameless outrunner motor
Frameless outrunner motors feature a rotor that encases the stator, creating a design where the outer component rotates while the inner part remains stationary. This configuration allows for a significantly larger air gap surface area and a longer torque arm, resulting in higher torque output per build volume compared to inrunner motors.
Frameless outrunners are an excellent choice for applications requiring high torque at lower speeds. With no need for additional transmissions or gearboxes, frameless outrunners provide a clean, efficient, and highly customizable solution, particularly when torque density is the primary concern.
Our outrunner torque motors come in four build volumes (40 mm, 110 mm, 250 mm, and 485 mm) with torque spanning from 0.97 Nm to 1207 Nm.
Frameless Inrunner Motors
Frameless inrunner motors, in contrast, have a rotor housed within the stator, creating a more compact design ideal for applications where space constraints and high-speed operation are key. This configuration enables precise rotational control and smooth performance.
While frameless inrunners may produce lower torque compared to outrunners, they can be paired with gearboxes to enhance torque output if necessary. The modularity of frameless inrunner motors allows for seamless integration into existing systems, providing flexibility without sacrificing performance or reliability.
Our inrunner torque motors are available in three build volumes (52 mm, 85 mm, and 170 mm), with torque ranging from 0.49 Nm to 70 Nm.
Frameless torque motor applications
- Food and packaging industry – Conveyor belt propulsion
- Robotics and Semiconductor – High precision and high accuracy technology
- Industrial or agricultural fan applications – HVLS fans
- Machine tool – Various machines and systems to create a significant reduction in costs
- Medial equipment – Medical imaging equipment
- Aerospace systems – Satellite, Gyroscopes and Inertial Navigation Systems
Available torque motor solutions
Outrunner Torque Motors – MI-F Series
Inrunner Torque Motors – IR-F Series
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