With this equipment, the learner should recognise the necessity and function of commutation.
Begins with block commutation and manual switching of the stator winding in six steps.
Objectives
- Mechanical alignment of the rotor
- Block commutation,
- Rotation of the rotor
- Field control via converter control
- Field-oriented control
- Sine commutation with resolver
- Digital commutation
- Measures are made with the Converter Controller CASSY
Permanently excited or separately excited synchronous machines cannot be operated safely without commutation. In this equipment, the learner deals with the basics of commutation. They can choose between block, sinus and digital commutation. Data is identified and recorded and analysed in characteristics diagrams for evaluation purposes.
Highlights:
- The measurements care 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.
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 equipment is equally suitable for pupil and student experiments in the laboratory with low voltage (DC, AC and three-phase current) and - with a mobile trainer - for teacher demonstrations in the classroom or lecture hall. 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 expanded experiments performed with the didactic frequency converter and a permanently excited or separately excited synchronous machine:
- 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
- E2.6.2.3 AC servo with industrial permanently excited synchronous machine
- E2.6.2.4 AC servo with industrial separately excited synchronous machine
Topics
- Rotating field of the stator
- Torque generation,
- Commutation angle for rotating field-oriented stator field,
- Block commutation,
- Sinus commutation,
- digital commutation
Main components:
