DC motor

Contents

Introduction

2.1 Main Dimensions

2.2 Anchor core

2.3 Main Pole Core

2.4 Core of additional poles

2.5 Bed

3. Armature winding

3.2 Armature winding with oval semi-closed slots

4 Winding of additional poles

5 Stabilizing serial winding of main poles

6 Characteristics of magnetization of machines

6.1 Magnetic Flux Refinement

6.2 MDS for air gap between anchor and main pole

6.3 MDS for teeth at oval semi-closed slots of anchor

6.4 MDS for anchor back

6.5 MDS for main pole core

6.6 MDS for clearance at the junction between the main pole and the frame

6.7 MDS for bed

7 Parallel winding of main poles

8 Arrangement of windings of main and additional poles

8.1 Parallel winding of main poles

8.2 Stabilizing serial winding

8.3 Winding of additional poles

9 Brushes and collector

9.1 Calculation of brushes and collector

10 Switching parameters

10.1 Calculation of switching parameters

11 Nominal mode

11.1 Calculation of nominal mode

11.2 Engine

12 Performance

12 Speed control

12.1 Upward Speed Control

12.2 Down Speed Control

13 Thermal and ventilation calculations

13.1 Thermal calculation. Losses in windings and brushes contacts

13.2 Armature winding

13.3 Winding of additional poles

13.4 Parallel winding of main poles

13.5 Collector

13.6 Ventilation calculation

14 Weight and dynamic parameters

Conclusion

List of used literature

Introduction

DC motors are used in electric drives that require wide, smooth and economical control of rotation speed, high reloading starting and braking moments, mainly in metalworking machines, paper machines, in the textile, rubber, printing industries, auxiliary mechanisms of the metallurgical industry, etc.

The design of DC motors is more complicated and their cost is higher than asynchronous motors, however, due to these properties, their specific gravity in the overall output of electric machines does not decrease, but, on the contrary, tends to increase. This trend has been especially evident over the past decades due to the development and widespread introduction of an automated drive, as well as the development of thyristor devices that create the possibility of powering DC motors from the AC network. However, the development of static converters entails a corresponding reduction in the output of DC generators.

Conclusion

In this course work, a DC motor was designed. Calculations of the magnetic circuit of the engine were carried out and sizes, material with the least losses were selected.

Winding parameters and time constants were calculated, thermal and ventilation calculations were performed, machine weight and dynamic parameters were calculated.

Спецификация.spw

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