Synchronous machine, permanently excited with surface magnets, BLDC, 0.3

Synchronous machine, permanently excited with surface magnets, BLDC, 0.3
Synchronous machine, permanently excited with surface magnets, BLDC, 0.3


The tests are carried out with industrially manufactured machines. All test machines have a special base for connection to the Machine Test System 0.3. With the Machine Test CASSY all measured values of the AC machines are recorded. The measured values can be shown directly on the built-in display as a single value, table of a measurement series or diagram. The measurements can be made without additional software, and the measured data can be stored locally on the unit. The Machine Test CASSY is used to record the characteristic curves of the test machines. The power supply for the test machines is partly taken directly from the public supply network.


  • Protective measures and electrical safety
  • Construction and commissioning of electrical machines
  • Use of starting circuits
  • Efficiency of the machine
  • Assessment of characteristic curves of electrical machines

Permanent magnet synchronous machines with buried magnets or surface magnets are usually used as motors. Due to their high efficiency, they often do not require their own cooling. This design allows installation in machine components such as a robot arm without special cooling. A permanent magnet synchronous machine usually requires an inverter supply and pole encoder control. Permanent magnet synchronous machines with surface magnets can show a high dynamic control behaviour with a small number of pole pairs, as they have a low moment of inertia due to their design.


  • To protect against overheating, the stator windings of the test machines are equipped with temperature detectors.
  • In case of overheating, the machine testing system switches off the load of the test machine, thus maintaining the air cooling. This prevents damage to the testing machines.
  • The test machines have a didactic terminal board with the winding diagram printed on it.
  • The ends of all the windings are led out at the terminal board at safety sockets (4 mm).
  • Computer-aided measured value acquisition provides meaningful measurement results.
  • The arrangement of the 4 mm safety sockets corresponds to the standards for industrial machines.

All functions of the Converter Controller CASSY and 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 Converter Controller CASSY and 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

Several integrated servers are available in Converter Controller CASSY and the Machine Test CASSY 0.3 for the local media connection of at least four end devices simultaneously.

For more details, see product data 7735290 or 7735291 Converter Controller CASSY and the 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 the slip-ring rotor:

  • E2.2.6.1 Synchronous machine, permanently excited with embedded magnets EPM, 0.3
  • E2.6.1.3 Sine commutated, permanently excited synchronous machine with surface-mounted magnets
  • E2.6.2.3 AC servo with industrial, permanently excited synchronous machine


  • Torque and load
  • Efficiency in engine operation
  • Operating behaviour as a generator

Main components:

Components of equipment sets

1 773350 Synchronous machine, permanently excited with surface magnets BLDC, 0.3 LD
Power electronic components of the drive
1 7735290 Converter Controller CASSY LD
1 7735297 Universal converter LD
1 7735295 DC power supply 390 V, 6 A, (PFC) LD
1 735290  4  Connecting cable universal converter LD
1 524222 CASSY Lab 2 for Drives and Power Systems LD
In this set-up, the incremental tachometer from the Machine Test System is used. Alternatively, the following commutations can also be used.
1 7731092 Incremental tacho, 0.3 LD
1 7731094 Resolver, 0.3 LD
1 7731096 Commutating encoder, 0.3 LD
2 773108  8  Coupling / shaft end guard 0.3, transparent LD
1 73106  4  Coupling, 0.3 LD
When the 7731096 commutation encoder is selected, the 7731092 incremental tachometer must also be added for speed and position control!
1 773115 Machine base bench, 120 cm LD
1 773108  8  Coupling / shaft end guard 0.3, transparent LD
1 73106  4  Coupling, 0.3 LD
Set-up for the machine test
1 7731900 Machine Test CASSY, 0.3 LD
1 7731991 Electrical dynamometer, 0.3 LD
1 31539  4  Weight, 1 kg LD
Power supply:
1 72671 Single-phase terminal unit LD
1 72609  4  Panel frame T130, two-level LD
1 50059  8  Safety bridging plugs, black, set of 10 LD
1 500591  4  Safety bridging plugs, yellow/green, set of 10 LD
3 500602  4  Safety experiment cable, 10 cm, blue LD
1 500855  4  Safety experiment cables, 32 A, set of 34 LD
1 500856  4  Safety experiment cables, 32 A, yellow/green, set of 5 LD
Additionally required:
PC with Windows 7/8/10
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