WET FILAMENT WINDING

BANDAGING FOR SYNCHRONOUS SERVO MOTORS

The rotors of synchronous servo motors are equipped with magnets for a permanent excitation. They need an outer bandaging that gives protection against loosening and displacement of the single magnets in service due to vibrations and centrifugal force, as well as damages during assembly (insertion of the rotor into the stator).

Servo motors are often used in industrial equipment such as machine tools, handling and assembly robots, packing machines, paper and printing machines, plastic machinery, textile machines and industrial automation.

For this application SAVER SpA has developed thin-walled tubes out of high temperature resisting epoxy-resin with reinforcement by endless glass roving (WT 2000).

  • Material Composition
    • Composite material consisting of epoxy-resin and glass roving.
  • Form of Delivery
    • Glassfibre reinforced epoxy tubes and sections, filament wound
  • Your Advantages
    • Excellent mechanical protection of the brittle magnets during assembly
    • Flexible sleeving of the rotor compensating shape deviations
    • High performance safety armouring in service
    • Very low wall thickness (0.3 mm) maintaining the motor’s effectiveness
    • Low specific weight granting minimal impact on mass moment of inertia
    • Cost reduction due to reduced number of process steps:
      • no handling of liquid resin
      • no winding
      • no time consuming curing operation

ENGINEERING DATA

  • Material Properties
    Units
    Value
  • Density
    g/cm³
    < 2,1
  • Tensile strength, circumferential
    MPa
    >500
  • Compressive strength, axial
    MPa
    >180
  • Water absorption
    %
    < 0,1
  • Glass transition temperature
    °C
    > 190