ELECTRICAL DRIVES DRIVE TECHNOLOGY

Industrial three-phase drives

E2.5.3.5

1.0

Drives with industrial frequency converter, 1.0 (E2.5.3.5)

Industrial frequency converters are used for machine optimisation and automation. The equipment includes an industrial, compact frequency converter class 1 kW. The focus of the experiments is on commissioning and parametrising the converter and investigating the machine behaviour.

The manufacturer‘s software is used for parametrisation; programming by hand is possible but not didactically useful given the large number of parameters.

Objectives

Protective measures and electrical safety

S et-up of power generating systems according to circuit diagrams

Putting electrical drives into operation

Recording of load characteristics with various operating parameters

Achieving skills in measuring electrical machines

Automatic speed control for an asynchronous (induction) machine

Measurements are carried out by the Machine Test CASSY

* additionally recommended

The pictured experiment stand is not included in this equipment. It can be added on request for an extra charge.

Electrical Drives Drive Technology

Load behaviour of drives

E2.5.4.1

Direct starting and star-delta starting of an asynchronous motor under load

Direct starting and star-delta starting of an asynchronous motor under load (E2.5.4.1)

In these experiments, the behaviour of an asynchronous motor is investigated upon direct start-up and star-delta start in the network.

The experiments are performed with an asynchronous machine 400/692 V. These can only be operated with the star-delta start directly on a supply network. In Germany, the direct start is only allowed with machines up to 4 kW. The high-efficiency machines and their high switch-on currents of up to 8 times the nominal current put a strain on the supply networks.

Objectives

Mains feedback with direct start with and without load

Mechanical load of the driven working machine

Optimisation of the star-delta start

Determining the switching time of an automatic star-delta circuit

Measurements are performed by the Machine Test CASSY

* additionally recommended

The pictured experiment stand is not included in this equipment. It can be added on request for an extra charge.