Torque Slip Characteristics in Single-Phase Induction Motor
In single phase induction motor , two revolving fields produce torques in opposite directions. Field no-1 rotates in a clockwise direction ,generating torque in that direction . Whereas field no-2 rotates in counterclockwise ,producing torque accordingly. The torque produced by the clockwise field is considered as positive , while that of the counterclockwise field is negative.
Torque slip characteristics in single phase induction motor
Initially both fields have slip =1 .When field no-1 reaches synchronous speed ,its slip becomes zero while the slip of field no-2 becomes two and vice versa. As a result, the resultant torque curve passes through zero torque indicating zero starting torque. However , once the motor starts rotating , torque is consistently present as seen in positions 1-1‘ and 2-2‘ , where one fields torque dominates ,causing the motor to accelerate in the corresponding direction .That means , once started ,the motor continues to rotate in the direction it is initiated.
Torque Slip Characteristics of Induction Motor
The torque slip characteristics of an induction motor is a plot that shows the relationship between the torque produced by the motor and the slip. Where slip is the difference between the speed of the rotating magnetic field produced by the stator and rotor speed. The torque slip characteristics are essential for optimizing the motor’s performance. The torque slip curve provides essential characteristics of the motor including its capabilities, efficiency and also operating range.
It is used to design and analyze motor systems for various applications. These are used in applications where high starting torque and high pull-up torque are required. It is used to predict motor behavioral characteristics under different load conditions and facilitates the design of control strategies to enhance performance.
Here in this article, we will discuss the definition of torque slip characteristics, torque slip characteristics in three-phase induction motors as well as single-phase induction motors, the effect of rotor resistance on torque-slip curve, advantages, disadvantages and applications of induction motors.
Table of Content
- Torque Slip Characteristics?
- Single-Phase Induction Motor
- Three Phase Induction Motor
- Effect of Rotor Resistance
- Advantages
- Disadvantages
- Applications