Coreless DC Motors

Coreless DC motors from FAULHABER – without cogging

Coreless DC motors from FAULHABER differ from conventional DC motors with iron armatures primarily due to their ironless, self-supporting copper coil with skew-wound design. Thanks to this design, the drives convince with extremely low rotor inertia, unique dynamics and without cogging, precise running. The self-supporting, ironless rotor coil with a skew-wound design – developed by the company’s founder Dr. Fritz Faulhaber senior – is the central element of every FAULHABER DC motor.

Widely used & often recommended

A FAULHABER DC motor is much more than a classic DC motor. The revolutionary technology with its dynamic performance in an extremely compact and extremely low-weight form, its precision and reliability has opened up new avenues for a wide variety of application areas. From medical applications to aerospace and even factory automation and robotics, manufacturers in a wide range of industries rely on FAULHABER coreless DC motors.

Commutations for FAULHABER DC motors

FAULHABER DC motors are available with two different commutation systems: precious metal commutation and graphite commutation. The term “precious metal commutation” refers to the materials, consisting of high-performance precious metal alloys, which are used in the brushes and commutator. We use this commutation system for our DC motors mainly on account of its compact size, the extremely low contact resistance and the precise commutation signal. It is particularly suitable for applications with low current load, e.g. battery-powered devices. Generally, the optimum operating point of precious-metal commutated motors in the case of continuous operation under load is at or close to the point of maximum efficiency of the motor.

The term “graphite commutation” refers to the brush material used in our DC motors in combination with a commutator made of a copper alloy. This commutation system is extremely robust and is better suited to dynamic high-performance applications with fast start/stop operation or periodic overload conditions.

DC motors to your exact specifications

FAULHABER offers the industry’s largest selection of complementary products tailor-made for all of its coreless DC motors. Among other things, we offer coreless DC motors with precision gearheads, high-resolution encoders and high-performance drive electronics. Use our Drive Selection Tool to assure yourself of the extensive selection and find the DC motor that is perfectly matched to your requirements.

At FAULHABER we have specialised in individually tailoring our coreless DC motors to the requirements of our customers. The following standard options are available for FAULHABER DC motors:

Additional voltage types
Connecting cables (PTFE and PVC) and connectors
Configurable shaft length and second shaft end
Modified shaft dimensions and pinion configurations such as flats, gears, pulleys and eccenters
Extended temperature range
Vacuum compatibility (e.g., 10^-5 Pa)
Modifications for high speed and / or high load applications
Modifications for motors with increased electrical or mechanical tolerance requirements

DC motors from FAULHABER

FAULHABER S/G

DC Micromotors with precious metal commutation

The most outstanding feature of this product family is first and foremost the rotor, consisting of a self-supporting, skew-wound copper winding without iron core. The resulting low weight minimises inertia. Together with the cogging-free running, these motors are characterised by unique dynamics.

FAULHABER SR

DC Micromotors with precious metal commutation

Compact, precious-metal commutated DC-micromotors and high-resolution encoder technology used in the SR series as well as the comprehensive range of high-precision planetary and spur gearheads form a perfectly harmonised combination for precise positioning tasks.

FAULHABER CXR

DC-Micromotors with graphite commutation

The CXR series combines power, robustness and control in a compact form. This is ensured by graphite commutation, high-quality neodymium magnets and the tried-and-tested winding of the FAULHABER rotor.

FAULHABER CR

DC-Micromotors with graphite commutation

Highly stable and low-wear graphite commutation, extremely powerful neodymium magnets and a particularly high copper content in the winding of the FAULHABER rotor give the CR series its enormous power. The impressive power range of 19 to 224 mNm is ideal for high-performance applications with fast start/stop operation or periodic overload conditions.

FAULHABER SR-Flat

Flat DC-Micromotors and DC-Gearmotors

Precious-metal commutated DC-Micromotors with uniquely flat coil technology with three flat, self-supporting copper windings used in the SR-Flat series form the basis for drive systems in applications where space is extremely limited.

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