How do you calculate the torque of a single-phase motor?

The calculation of torque in a single-phase motor is fundamentally linked to the relationship between power and rotational speed. The formula used to determine torque is based on the concept that power is the product of torque and angular velocity.

In this context, the correct formula shows that torque can be calculated by rearranging the relationship between power and RPM (Revolutions Per Minute). Specifically, the expression shows that torque is derived from the power consumed by the motor, adjusted by a constant that relates to speed (in this case, the factor 5252, which arises from the conversion of horsepower and RPM into torque in pound-feet). This makes the formula specifically designed for units of power measured in horsepower and speed measured in RPM, resulting in torque measured in pound-feet.

Thus, when calculating torque, it is essential to consider both the motor's power output and the speed at which it operates. This ensures that the torque value is accurately reflective of the motor's performance capabilities under load.