If the slip in a motor decreases while the torque remains constant, what is the effect on the motor's speed and power?

When discussing the relationship between slip, speed, and power in a motor, it's important to first understand the concept of slip. Slip in a motor is defined as the difference between the synchronous speed of the rotating magnetic field and the actual speed of the rotor. In a scenario where the slip decreases while the torque remains constant, this means that the rotor is operating closer to synchronous speed.

As the slip decreases, the actual speed of the rotor increases because the rotor is now more effectively tracking the rotating magnetic field. This increase in speed occurs while the torque remains constant, which is key in understanding the impact on power.

Power in electrical motors is generally calculated as the product of torque and angular velocity. Since torque is constant and the angular velocity (which is proportional to speed) is increasing as slip decreases, the overall power output of the motor will also increase. This relationship follows the formula for power ( P = T \cdot \omega ), where ( T ) is torque and ( \omega ) is angular velocity (or speed).

Thus, the correct interpretation is that with a decrease in slip, the speed of the motor increases alongside an increase in power due to the constant torque being exerted.