Three-phase asynchronous motor with short-circuited rotor.

Contents

Introduction

Select Primary Dimensions

Stator calculation and winding construction

Rotor calculation

Magnetic Circuit Calculation

Operating mode parameters

Asynchronous motor losses and efficiency

Analytical calculation of performance characteristics. Pie chart

Thermal calculation and ventilation

Conclusion

Bibliographic list

Project Description

Course work contains: 37 pages, 7 figures, 1 table, 3 sources, 1 sheet of graphic material.

Stator, short-circuited rotor, magnetization current, air gap, magnetic circuit, operating characteristics, trapezoidal slots, bulk winding, winding pitch.

The object of the course study is the calculation of an asynchronous motor with a short-circuited rotor.

Course work is done in the Microsoft Office Word text editor.

Task

Design a three-phase asynchronous motor with short-circuited rotor. Design Input:

Rated engine shaft power P2 = 37000 W

Rated speed n1 = 3000 rpm

Degree of protection of IP44 engine

Connection of stator winding Y/Δ

Supply mains frequency 50 Hz

Number of phases 3

Rated 220 V mains phase voltage

IM1081 Form and Installation Method

Cooling method IC0141

Introduction

Asynchronous motors are the main converters of electrical energy to mechanical energy and form the basis of the electric drive of most mechanisms. Series 4A covers the range of rated powers from 0.06 to 400 kW and has 17 heights of the rotation axis from 50 to 355 mm.

EM design is a complex complex task, including the calculation and selection of their main dimensions, the design of parts and assembly units with the subsequent layout of EM as a whole, requiring knowledge of the theory of electrical machines, the properties of electrical and structural materials, technology and production.

Asynchronous short-circuited rotor motors are widely used in industry due to the simplicity of the device and control, reliability in operation, lowest weight, dimensions and cost at a given power. Their weight per unit of power is 1.5-2 times lower than that of DC motors.

Conclusion

In this course work, we calculated the asynchronous motor of the 4A series. When calculating, we conducted a number of checks that indicate the correctness of the calculations. Built performance characteristics. The main characteristics of the engine: coseta= 0.93, eq = 0.91. A thermal calculation was made according to which it can be concluded that the heating engine does not exceed the permissible heating in the heating resistance class for the selected heating resistance class.

16_IP44_h200.cdw