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  • Coreless DC Motors

Coreless Brush DC Motors

FAULHABER coreless DC motors differ from conventional iron core DC motors in that the rotor consists of a self-supporting, skew wound copper coil. These motors also feature an extremely low rotor inertia and zero cogging or preferred rotor position, as well as a uniquely high, power to volume ratio.

Brush DC Motor - Commutation Types

FAULHABER DC Motors are built with two different types of commutation systems: precious metal commutation and graphite commutation.

Both the precious metal-commutated DC motors as welll as the graphite commutated motors are compatible with a variety of additional standard components including high resolution encoders, precision gearheads, and controllers. Additional modification and customization options are also available to help our customers meet their application requirements. Common modifications include vaccuum compatibility, extreme temperature compatibility, modified shaft, additional voltage types, custom micro motor leads and connectors, and more.

Micro DC Motors: Precious Metal-Commutation

The term "precious metal commutation" refers to the materials used in the brushes and commutator which consist of high performance precious metal alloys. This type of commutation system is used mainly because of its very small size, very low contact resistance, and the very precise commutation signal. This commutation system is well suited for low current applications such as battery operated devices. In general, precious metal commutated motors exhibit the best overall performance at continuous duty with a load at or around the point of maximum nominal efficiency.

For low power micro dc motors, commutation systems using precious metals are the optimum solution because of their low contact resistance. FAULHABER precious metal commutated motors range in size from just 6mm to 22mm in diameter.

Precious Metal Micro DC Motor Advantages

  • Ideal for battery operated devices
  • No cogging
  • Extremely low current consumption – low starting voltage
  • Highly dynamic performance due to a low inertia, low inductance winding
  • Light and compact
  • Precise speed control
  • Simple to control due to the linear performance characteristics

view coreless brush dc motors and datasheets now

 

micro dc motors - precious metal commutation product code

 

Micro DC Motors: Graphite Commutation

The term "graphite commutation" refers to the brush material used in combination with a copper alloy commutator. This type of commutation system is very robust and is better suited to dynamic high power applications with rapid start / stops or periodic overload conditions.

These motors feature brushes manufactured of a sintered metal graphite material and a copper commutator. This ensures that the commutation system can withstand more power and still deliver exceptionally long operational lifetimes. A multitude of adaptations for customer specific requirements and special executions are available.

FAULHABER motors with graphite brushes range in size from 13mm to 38mm in diameter.

Graphite Commutation Micro DC Motor Advantages

  • No cogging
  • High power density
  • Highly dynamic performance due to a low inertia, low inductance winding
  • Light and compact
  • Precise speed control
  • Simple to control due to the linear performance characteristics

view coreless brush dc motors and datasheets now

 

micro dc motors - graphite commutation product code


 

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