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The main strength of these motors are that they are small and compact. In its shortest design, motor type GDM 12 N, only 39,5 mm of axial space is required.

Two motor types are available.

DC Disc Motors
Baumüller DC disc motors are permanent magnet motors with non-ferrous rotors and barrel commutators. Conse-quently, they are low in inertia and highly dynamic throughout the whole speed range.

Brushless Disc Motors
For applications where DC motors (with their associated commutator and carbon brushes) are unsuitable, brush-less disc motors are ideal. The additional electrical control required for any special applications can also be incor-porated in the motor frame.

GDM 75 - 12 - DC Disc Motors

Barrel commutator Ironless rotor Winding as a wire bobbin Given sufficient ventilation, and depending on the type of winding, these motors are able to provide peak powers well in excess of their nominal ratings; even capable of offering full nominal torques at standstill without sustaining thermal damage The inductance of the armatures is very low, which is the reason for minimal wear of carbon brushes. There- fore maintenance costs can be substantially reduced. All of the GDM range permit a high dynamic performance throughout the whole speed range. Therefore, they are very well suited to high transient loadings i. e. frequent start/stop running modes Speed-regulated motor without any externally mounted electronics Reduction in cost of cabling No additional installation of sensor mechanisms, such as tachogenerators or impulse transmitters/encoders Maintenance-free due to brushless electronic commutation Flat construction

GDM 75-12 Technical data

Subject to technical modifications
Technical data for continuous operation at an environmental temperature of 25°C and with sufficiently large cooling surface. Insulation class F, protective system IP 44. Other data and protective systems on request All motors are also available with tachometer generator, pulse encoder, holding brake and gearbox.

GDM 100 - 250 - DC Disc Motors

• Barrel commutator
• Ironless rotor
• Winding as a wire bobbin
• Given sufficient ventilation, and depending on the type of winding, these motors are able to provide peak
  powers well in excess of their nominal ratings; even capable of offering full nominal torques at standstill
  without sustaining thermal damage
• The inductance of the armatures is very low, which is the reason for minimal wear of carbon brushes. There- fore maintenance costs can be substantially reduced.
• All of the GDM range permit a high dynamic performance throughout the whole speed range. Therefore, they are very well suited to high transient loadings i. e. frequent start/stop running modes
• Speed-regulated motor without any
  externally mounted electronics
• Reduction in cost of cabling
• No additional installation of sensor mechanisms, such
  as tachogenerators or impulse transmitters/encoders
• Maintenance-free due to brushless
  electronic commutation
• Flat construction

   

GDM 100 - 250 Technical data

Subject to technical modifications
Technical data for continuous operation at an environmental temperature of 25°C and with sufficiently large cooling surface. Insulation class F, protective system IP 44. Other data and protective systems on request All motors are also available with tachometer generator, pulse encoder, holding brake and gearbox.

DSM 115 - 190 - Brushless Disc Motors

• Barrel commutator
• Ironless rotor
• Winding as a wire bobbin
• Given sufficient ventilation, and depending on the type of winding, these motors are able to provide peak
  powers well in excess of their nominal ratings; even capable of offering full nominal torques at standstill
  without sustaining thermal damage
• The inductance of the armatures is very low, which is the reason for minimal wear of carbon brushes. There- fore maintenance costs can be substantially reduced.
• All of the GDM range permit a high dynamic performance throughout the whole speed range. Therefore, they are very well suited to high transient loadings i. e. frequent start/stop running modes
• Speed-regulated motor without any
  externally mounted electronics
• Reduction in cost of cabling
• No additional installation of sensor mechanisms, such
  as tachogenerators or impulse transmitters/encoders
• Maintenance-free due to brushless
  electronic commutation
• Flat construction

Brushless Disc Motors are manufactured according to two different principles:

For the lower range (motors DSM 115) the principle of DC disc motor is just reversed. The ironless winding slips from the rotor into the stator, the magnets slip from the stator into the rotor where they can be built in the easiest way just upon the rotating magnetic feedback. This type of motor has no cogging effect on principle.

For the higher range (motors DSM 117 – 190) the stator winding will be inserted into the slotted armature with skewed stacks. The power output can be increased considerably by means of the smaller magnetic air gap. The cogging effect normally existing on this type of motor is nearby completely compensated by special means.

DSM 115 - 190 Technical data

1) ironless disc motor with integrated electronic
2) ironless disc motor
Subject to technical modifications