Industrial induction machines with rotor kits

The experiments are carried out with the industrial machine assembly kits.

Objectives

• Protective measures and electrical safety
• Recording machine characteristics
• Set-up of various electrical machines

The asynchronous machines with alternating rotor consist of a stator and three different rotors. Only by assembling the stator and rotor does a ready-to-operate electrical machine of the 300 W class come into being. The stator contains a three-phase winding, the drive-end shield and the terminal box. The rotors are constructed as aluminium squirrel cage rotors, copper squirrel cage rotors and slip-ring rotors. The stator housing is mounted on a base and can be connected directly to the machine test system 0.3. The stator and rotor are securely connected by star grip tension bolts, which allow the rotor to be changed quickly. No tools are required for this. The rotors are equipped with non-drive-end shield, fan impeller, cover bonnet and commutator, brushes, etc. Together with the machine test system, the characteristic curves of the machines can be traced back to the properties of the respective stator. Depending on the rotor used, the model machine then shows the typical characteristics of squirrel cage and slip-ring machines.

Highlights

• Comparison of efficiencies and characteristics of machines with different rotors
• Simple assembly for rapid set-up and time-effective lab experiments

All functions of the Machine Test CASSY 0.3 can be operated quickly and directly via the display, the rotary wheel and the buttons on the unit. All settings and measurement results can be saved on the unit and quickly called up again later or simply downloaded.

In addition, the Machine Test CASSY 0.3 is fully controllable in real time via RJ45 Ethernet, W-LAN and USB-C interfaces.

These interfaces can be used by the following software:

• CASSY Lab 2 for drives and energy systems,
• MATLAB® and LabVIEW ™
• Lab Docs Editor Advanced

The following integrated servers are available in the Machine Test CASSY 0.3 for the local media connection of at least four end devices simultaneously.

For more details, see product data 7731900 or 7731901 Machine Test CASSY 0.3

The individual equipment is equally suitable for student experiments in the laboratory with low voltage (230 / 400 V three-phase current) and - with a mobile trainer - for teacher demonstration in the classroom. The experiments are carried out according to the manual.

The target group is made up of commercial apprentices and students of electrical machine construction. The course offers experiments at an intermediate level and also allows for the necessary insight into machine behaviour for scientific interpretation at undergraduate level. The media connection makes the experiments suitable for demonstration in the classroom or a lecture hall.

In the following configurations there are further extended experiments with DC machines:

• E2.5.3.1 Static Converter Drives with asynchronous machines
• E2.5.3.3 Drives with educational frequency converter
• E2.5.3.4 Drives with industrial frequency converter 0.3
• E2.5.4.2 Direct starting or starting with a soft starter of an asynchronous motor under load
• E2.5.4.3 Starting of large flywheel masses with slip-ring motor
• E2.6.2.2 AC servo with industrial asynchronous machine

Topics

• Recording the torque-speed characteristic
• Determination of the nominal operating values of electrical machines as a motor
• Comparison of the efficiencies of different machines as motor