Brushed DC motors from FAULHABER
As the UK and Ireland’s sole supplier of FAULHABER motors, EMS offers a selection of brushed DC motors that offer precision to a variety of applications. Unlike brushless motors, which replace the mechanical commutation function with electronic control, brushed DC motors operate based on the mechanical linkage between their commutator and brushes. The key difference between FAULHABER brushed DC motors and conventional brushed DC motors is in the rotor.
In FAULHABER’s brushed DC motor design, the permanent magnet stator is cylindrical and is located on the inside, while the rotor rotates around it on the outside. The rotor consists of an ironless, self-supporting skew-wound copper coil. This technology was developed by Dr. Fritz Faulhaber Sr. and patented in 1958. It is at the heart of what DC micromotors from FAULHABER are all about.
This design not only minimises the moment of inertia of the rotor, but also gives the drives maximum dynamics and precise, cogging-free running. This results in outstanding dynamics across the entire range.
Sizes start from the incredibly small 3mm diameter motor, up to 44mm, making them ideal choices for applications such as medical devices, aerospace, control and instrumentation.
Selecting a brushed DC motor
There are several advantages to using a brushed DC motor in your application:
- High starting torque
- Simple control over a wide speed range
- Torque and motor speed can be controlled by voltage
- Excellent power to weight ratio
- More cost effective compared to brushless
Brushed DC motors from FAULHABER use skew wound coreless motor technology to give unrivalled power-to-weight ratios. The omittance of iron in the winding of these motors improves efficiency and enhances acceleration times to give outstanding dynamic performance together with long life under extreme load conditions.
The motors are available with graphite or precious metal commutation. Graphite commutation is particularly robust and is ideally suited to dynamic high-performance applications, whereas precious metal commutation makes extremely small DC motors possible.
For low power motors, it’s best to select commutation systems using precious metal brushes because of their extremely low contact resistance. However, copper graphite brushes are recommended for higher power motors to ensure long life even under extreme load conditions.
The total weight of the brushed motors is extremely low. In addition, this structure ensures a minimum moment of inertia and cogging-free, high-precision running. Thanks to these features, DC motors from FAULHABER have particularly high dynamics and high-power density.