What is the Slip Percentage of a Squirrel Cage Motor at No-Load?

In a squirrel cage motor, slip percentage refers to the difference between the synchronous speed of the magnetic field and the actual speed of the rotor, expressed as a percentage of synchronous speed. At no-load conditions, a squirrel cage motor operates closer to the synchronous speed, which results in a very low slip. However, it’s important to recognize that even in no-load conditions, there is still a small amount of slip present because the rotor must overcome friction and windage losses, as well as maintain a certain level of torque to keep the motor running.

Typically, the slip percentage at no-load will not be zero. It usually falls within a range that can be assessed depending on the design and application of the motor. While it is indeed very low, it is often still greater than 1%, which accounts for the inherent losses and necessary performance factors involved.

Therefore, the option indicating that the slip percentage is more than 1% correctly acknowledges that even under optimal conditions with minimal load, some slip exists due to the operational characteristics of the motor.