Table of report contents

1. Nominal data of transformer.

2. Chart of carrying out tests and list of devices which are used with their metrology descriptions.

3. Responses, built under experiments data and calculations results.

4. Equivalent circuit of transformer with pointing of resistance values, and also vector diagrams at cosφ₂ = 1; cosφ₂ = 0, at

((φ₂ = + π/2), cosφ₂ = 0, at (φ₂ = − π/2).

5. Short conclusions which explain the results got in-process.

Control questions

1. How is a single-phase transformer arranged?

1. What do the values of windings EMF of transformer depend on?
2. What is called the transformation ratio?
3. What mode of transformer operation permits to define most exactly its transformation ratio?
4. What losses of energy do take place in a transformer and what do they depend on?
5. In what case the efficiency of transformer does reach a maximal value?
6. Why do the parameters of magnetizing branch of equivalent circuit of a transformer determine from experience of idling?
7. What is called a voltage of short circuit of transformer?

Laboratory work2

RESEARCH OF DC GENERATOR OF PARALLEL EXCITATION

Aim of work

To familiarize with the design of DC generator, characterize its characteristics and study the features of service.