Frameless DC motors for robotic joints

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90W brushless EC 90 flat frameless motor
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Compact flat brushless DC motors from maxon motor are now available as frameless kits for additional space savings in robotic applications.

Motors used in robotics must be lightweight while simultaneously providing high torque in order for arms and grippers to move dynamically. This is why Swiss drive specialist maxon motor is offering its tried and tested brushless flat motors as frameless kits. Being frameless provides a number of benefits.

DC motors cannot always be optimally integrated into a structure. In robot joints for example, space and weight are priority considerations that take standard motors to their limits. This is why maxon motor developed an alternative for the growing robotics market and is now offering its brushless flat motors (EC flat) as frameless kits. Rotor and stator are delivered separately, without bearings and motor shaft, and connected only when the components are assembled. This offers our customers the best of both worlds: high torque density and minimum volume. With outer diameters of only 43 to 90 mm, the EC flat series’ brushless flat motors are extremely compact. Designed as external rotor motors, they offer plenty of space inside for cable glands. maxon delivers them with Hall sensors for easy control.

Space for cable glands

Engineers can integrate maxon frameless motors in robotic joints and save space. This has the following benefits:

* High level of integration in the structure of the machine
* High torques through multi-pole external rotor
* Low cogging torque
* Plenty of space for cable glands
* High overload capacity
* Equipped with Hall sensors and thermal sensors (NTC)

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