Electrical machinery. Shiderova R., Almuratova N., Yar-Mukhamedova G.

3 800 4 400 

In the book sets out the basic principles of the theory of electrical machines, physical processes, properties and characteristics of the main types of machines transformers, asynchronous machines, synchonous machines and DC machines their meaning, uses and regime during the work. It is described the design each type of Electrical machines and their particular qualities. It’s performanced characteristics types of electrical machines on this base is made the conlusions about their advantages and disadvantages. Also sets out the principles of actions and construction the main types of electrical machines, which uses in system of automatic regulation and manage.
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Product Description

1. BRIEF HISTORICAL INFORMATION ABOUT ELECTRIC
MACHINES AND TRANSFORMERS ……………………………………………………………. 10
1.1. General information about electrical machines and transformers …………………… 11
1.2. Materials used for manufacturing electrical machines and transformers ………….. 14
2. TRANSFORMERS ……………………………………………………………………………………….. 16
2.1. Nominal values ………………………………………………………………………………………. 16
2.2. Transformer design …………………………………………………………………………………. 17
2.2.1. Magnetic core ………………………………………………………………………………………. 17
2.2.2. Voltage transformer windings ………………………………………………………………… 19
2.3. Operation principle of transformers …………………………………………………………… 20
2.4. Reduced transformer ……………………………………………………………………………….. 23
2.5. Transformer equivalent circuit and vector diagram ………………………………………. 24
2.6. Experimental determination of equivalent circuit parameters and transformer
losses. No-load and short-circuit experiment …………………………………………………….. 25
2.6.1. Experiment of no-load operation …………………………………………………………….. 26
2.6.2. Short circuit experiment ………………………………………………………………………… 30
2.7. Transformer operation under load ……………………………………………………………… 34
2.7.1. Vector diagram of a loaded transformer …………………………………………………… 34
2.7.2. Simplified vector diagrams under load …………………………………………………….. 37
2.7.3. Determination of secondary voltage changes ……………………………………………. 38
2.7.4. External characteristic of a voltage transformer ………………………………………… 41
2.7.5. Transformer efficiency ………………………………………………………………………….. 41
2.8. Three phase transformers …………………………………………………………………………. 44
2.8.1. Structural features of three phase transformer core ……………………………………. 44
2.8.2. Schemes and connection groups of transformer windings ………………………. 46
2.8.2.1. Schemes of transformer windings connection ………………………………… 46
2.8.2.2. Groups of windings connection ……………………………………………………………….. 47
2.8.2.2.1. Single-phase transformer ……………………………………………………………………… 47
2.8.2.2.2. Three-phase transformer ……………………………………………………………………….. 48
2.8.3. Transformers operation in parallel ………………………………………………………….. 53
2.8.3.1. Parallel operation of transformers with different groups of windings
connection ……………………………………………………………………………………………………. 54
2.8.3.2. Parallel operation of transformers with different transformation
coefficients …………………………………………………………………………………………………… 55
2.8.3.2.1. Parallel operation of transformers with different transformation
coefficients at no-load ……………………………………………………………………………………. 56
2.8.3.2.2. Parallel operation of two transformers with different coefficients of transformation under load ………………………………………………………………………………. 57
2.8.3.3. Parallel operation of transformers with different short circuit voltages ……… 58

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Переплет

Мягкий, Твердый

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