Synchronous generator design

Contents

Introduction

1. Machine magnetic circuit. Dimensions, configuration, material

2. Stator winding

3. Magnetic Circuit Calculation

4. Active and inductive resistance of windings

5. Magnetic Circuit Calculation at Load

6. Excitation winding

7. Winding parameters and time constants. Resistance of stator windings at

steady state

8. Losses and Efficiency

9. Characteristics of machines

10. Thermal and Ventilation Calculation

11. Mass and dynamic moment of inertia

List of literature

Summary

Synchronous generator calculation is performed as per [3].

Design features of synchronous generator design are considered

Calculations of the motor magnetic circuit were made, sizes, configuration, material, calculation of the stator winding, pole windings were selected, active and inductive winding resistances were obtained, working and angular characteristics were built. The winding parameters are calculated by thermal and ventilation calculations, dynamic parameters of the machine are calculated.

Also, an assembly drawing of a general type of synchronous generator and, detailing of the bearing shield and the bed are made .

Introduction

Modern power plants use synchronous generators of three-phase alternating current. The primary engines for them are steam turbines or hydraulic turbines. Most turbogenerators are fast, i.e. they have a maximum speed of 3000. Small-capacity generators connected to diesel engines and other piston machines are manufactured at 7501500 rpm. Radial slots are milled along rotor surface to receive excitation winding. Slots are closed with wedges, and in the frontal part the winding is fixed with band rings.

For NPP, due to low steam parameters, it is advisable to use four-pole generators with a rotation frequency of 1500 rpm. Hydraulic generators of large and medium power are made with a vertical shaft, in the upper part of which the generator is located, and in the lower part - a hydraulic turbine.

In our country, synchronous generators with permanent magnets have been used in wind power, in aviation, but are practically not used in various autonomous power supply systems.

It is considered a promising direction to develop electric generator units with a synchronous generator with permanent magnets and with an output electronic unit, as having better weight and size characteristics, higher efficiency, dynamic characteristics that allow the drive unit to operate at different speeds of rotation.

Experience in the development of synchronous generators with permanent magnets (SGPM) has shown that the greatest effect is achieved in generators with high speeds of rotation. Therefore, it is no coincidence that they find use in aviation driven by aircraft engines.

This work presents the calculation of synchronous generator parameters, which is made in the protective version of IP23, by self-ventilation IC01. Synchronous generator is designed for long-term operation .

Excitation current is controlled by change of ignition angle of thyristors of excitation device converter. The excitation winding of the synchronous generator receives rectified current through thyristor and diode converters connected in parallel on the rectified current side. Thyristor converter is fed from additional winding embedded in slots of stator of synchronous generator.