E2.6.2.3 AC servo with industrial permanently excited synchronous machine
AC servos with permanently excited synchronous machines are highly valued due to their high dynamics and are the most widely used drives in CNC technology. This type of machine has reached almost all areas of drive technology, e.g. PC fans, quadrocopters and electric vehicles. In the field of power drives, high efficiency and freedom of maintenance are critical. For small drives, the variety of designs is often decisive. This equipment allows the learner to investigate the properties of this variable drive.
Objectives
- Optimising control loops
- 2 and 4 quadrants control
- Static speed control
- Highly dynamic speed control
- Dynamic speed control
- Position control
- Step response
The set-up of an AC servo with a permanently excited asynchronous machine is analysed. Measurements and calculations are used to attempt to optimise the drive for its applications.
- Calculating the control difference
- Analysing loads with step of reference variable
- Approaching stability limits
Highlights:
- The measurements are carried out with the CASSY converter controller.
- All measurement channels are potential-free and can therefore be used freely.
- All measurements can be carried out with or without a computer.
- In order to protect against overheating, the stator windings of the permanently excited synchronous machine are equipped with thermal detectors.
- The permanently excited synchronous machine has a didactic terminal board
All functions of the Converter Controller CASSY 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 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 for the local media connection of at least four end devices simultaneously.
For more details, see product data 7735290 or 7735291 Converter Controller CASSY.
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 performed with the educational frequency converter and a permanently excited synchronous machine:
- E2.6.1.1 Basics of commutation technology
- E2.6.1.2 Block commutated synchronous machine
- E2.6.1.3 Sinus-commutated permanently excited synchronous machine with surface magnets
- E2.6.1.4 Incrementally commutated permanently excited synchronous machine with embedded magnets
- E2.6.2.4 AC servo with industrial separately excited synchronous machine
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