Table of report contents

1. Rated data of motor.

2. Circuit of research of asynchronous motor.

3. Tables of measuring and calculations, used formulas.

4. Equivalent circuit of asynchronous motor with the parameters values indicated on it.

5. The graph of losses distribution.

6. Speed-torque characteristic of asynchronous motor and characteristic M = f(s).

7. Conclusions in relation to properties of asynchronous motor and explanation to the graphs.

Control questions

1. How the three-phase asynchronous motor with the squirrel-cage rotor is arranged?

2. What is a principle of asynchronous motor operation and why it is so called?

3. What sliding?

4. What terms of origin of the circular revolved magnetic field?

5. What rotation frequency of the magnetic field created by the stator winding does depend on?

6. What electromagnetic asynchronous motor power?

7. Why the nominal sliding of asynchronous motor must be minimum?

8. With what aim do carry out distribution of mechanical and magnetic losses of asynchronous motor?

9. How to change direction of motor rotation?

10. How to define a motor rated moment by its registration certificate data?

11. What advantages and lacks of asynchronous motor with the squirrel-cage rotor?

 

 

CALCULATION OF ELECTROMAGNETS OF DIRECT-CURRENT

 

А. PRELIMINARY CALCULATION of ELECTROMAGNET. CALCULATION OF KEY SIZE OF CORE