Basic Electronics and Electrical Engineering: Chapter 5: Induction Motors

Rotor Output of Induction Motor

Home | Department: ECE Department | Ist Year | Subject: Basic Electronics and Electrical Engineering |

Induction Motor: Rotor Output

ROTOR OUTPUT

Let, T_g be the gross‒torque developed by the motor in N‒m and N, the speed of the rotor in rpm.

Gross rotor output = 2πΝΤ_g / 60 watts ……..(5.22)

If there were no copper losses in the rotor, the output would equal rotor input and the motor would run at synchronous speed, N_S.

Rotor input = 2πN_ST_g / 60 Watts …………(5.23)

Rotor input = Rotor output + Rotor Cu loss

Rotor Cu loss = Rotor input ‒ Rotor output

Rotor Cu loss = 2πT_g/60 (N_S‒N) …………(5.24)

Eqn (5.24) divided by eqn (5.23),

Rotor Cu loss / Rotor input = (Ns‒N)/N_S = s

Rotor Cu loss = s × Rotor input ... (5.25)

Gross rotor output, P_m = Rotor input ‒ Rotor Cu loss

= Rotor input ‒ (s × Rotor input) …………(5.26)

P_m = Rotor input × (1 − s)

Eqn (5.26) divided by Eqn (5.23),

Gross rotor output / Rotor input = 1‒s = N / N_S

Eqn (5.24) divided by Eqn (5.26)

Rotor Cu loss / Gross rotor output = s / 1‒s …….. (5.28)

Basic Electronics and Electrical Engineering: Chapter 5: Induction Motors : Tag: Basic Engineering : - Rotor Output of Induction Motor

Home | Department: ECE Department | Ist Year | Subject: Basic Electronics and Electrical Engineering |

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Basic Electronics and Electrical Engineering: Chapter 5: Induction Motors

Induction Motors: Introduction

Advantages and Disadvantages of Three Phase Induction Motors

Construction of 3-phase Induction Motor

Advantages of Squirrel Cage and Slip Ring Rotors - Induction Motor

Production of Rotating Magnetic Field in Three Phase Induction Motor

Operational Principle of Three Phase Induction Motor

Slip - Definition, Formula | Induction Motors

Frequency of Rotor Current - Induction Motor

Rotor Current in Three Phase Induction Motor

Equivalent Circuit of Three Phase Induction Motor

Rotor Torque in Three Phase Induction Motor

Starting Torque in Three Phase Induction Motor

Condition for Maximum Starting Torque - Three Phase Induction Motors

Torque Under Running Conditions - Three Phase Induction Motors

Condition for Maximum Torque Under Running Conditions - Three Phase Induction Motors

Torque-Slip Characteristics in Three Phase Induction Motors

Power Stages in an Induction Motor

Induction Motor Torque

Rotor Output of Induction Motor

Speed Control of Induction Motors

Starting of Induction Motors

Introduction of Single Phase Induction Motors

Types of Single Phase Motor

Making Single Phase Induction Motor Self Starting

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