No compromises with saw motors – Fischer impresses with its quality

How Fischer saw motors work

Saw motors from Fischer are designed as disc rotor motors and are therefore particularly narrow due to their design. A disc rotor electric motor can be individually adapted to the desired requirements by means of the DC link voltage as well as by means of its winding data.

The relationship between the number of turns, torque and speed determines the working point of the disc rotor motor.

The motors are mainly used in multi-blade sawing systems for the flooring and furniture industry.

Direct drives are mainly operated at their thermal power limit and therefore have to be constantly temperature monitored.

Temperature sensors are installed in the motors to protect against thermal overload.

  • PTC (thermistor)
  • PT 1000 (optional)
EU-Patent-Nr. 1842614

Convincing advantages of Fischer saw motors at a glance:

Maintenance-free: Due to the direct drive technology, the motors are not subject to wear and are therefore maintenance-free.

High precision: Through the use of a hardened and ground saw blade holder, a very high precision is achieved with regard to the axial and radial runout.

Compact: The motors are designed as synchronous disc rotor motors and can therefore be made extremely compact.

Low noise output: Our motors do not require gearboxes in the powertrain, and we also use only extremely high-precision and high-quality mechanical components. In this way we achieve a surprisingly low noise level.

High energy efficiency: Our saw motors with permanent magnets achieve the highest energy efficiency with efficiencies of 92-95 %.

For comparison, see the classifications IE1 to IE4 below: Sensorless operation: Fischer saw motors are operated without a rotary encoder or angular measuring system. The speed can be infinitely adjusted via the motor controller.

High power density: We use extremely strong neodymium magnets – this enables us to achieve an enormously high power density even with very compact motors.

Here you can find more information on the following areas:

Fischer saw motors can produce much more than just a rotary movement. SThey draw their special strength from the magnetically pretensioned system with strong neodymium magnets. A gearbox can be dispensed with.

The system is basically secured against the ingress of dirt with sealing air.

IMPORTANT: The cooling takes place at the rear and has to be adapted by the customer to the installation situation. We advise that cooling be ensured by means of intake air or an additional external fan. For information on cooling and the design possibilities available, please contact our R&D team.

If a conductor loop is moved in a magnetic field, a voltage is induced into the conductor loop. A current-conducting coil generates a temporally changeable electric field that interacts with the constant magnetic field of the rotor. The resulting force is used to generate the rotary motion. A disc rotor motor consists of two components: the stator with coils and the rotor with permanent magnets. A disc rotor motor consists of two components: the stator with coils and the rotor with permanent magnets.

The distance between the stator and rotor (air gap) is decisive for the magnitude of the torque. A stable bearing system guarantees a constant air gap and smooth running.

Customer-specific electric motors are almost the rule at Fischer Elektromotoren. The electrical connection options differ entirely depending on the later use and installation situation and are implemented individually.

  • Cables with plugs – variable cable lengths
  • Open-ended cables with wire end ferrules – variable cable lengths
  • Built-in socket on motor housing

A second cable output may be necessary depending on how complex the customer specifications are with regard to additional components (for example measuring systems, temperature sensors, etc.) Basically, the following applies: Fischer electric motors are equipped with precisely the connections that the customer requires.

The listed performance data are feasibility proposals, our direct drives are always customer-specific.

Catalogue Data

Measurement technology

Motors from Fischer Elektromotoren GmbH are tested according to the EC directive 73/23/EEC and the EN 50178 and EN 60204 standards.
These test procedures are carried out prior to delivery:
  • High-voltage test
  • Partial discharge test
  • Insulation test (VDE measurement)
  • Pole position test
  • Resistance measurement of phases and temperature sensors
  • IInductance measurement
  • EMF measurement

Modernste Messtechnik zur Qualitätssicherung.

Wir setzen modernste Messtechnik zur Vermessung aller Motoren ein. An unseren Prüfständen werden die Parametersätze für die Inbetriebnahme sowie die Spitzen – und die Nennwerte des Motors ermittelt. Dabei werden der thermische Motorschutz und die Wasserkühlung berücksichtigt. Alle mechanisch verbauten Komponenten werden mit neuester Messtechnik wie 3D- und Höhenmessmaschine gemessen.