In a constant-horsepower load, how does torque behave as speed increases?

In a constant-horsepower load scenario, horsepower (HP) is defined as the product of torque and rotational speed (RPM). The relationship can be expressed with the formula:

[ \text{HP} = \frac{\text{Torque} \times \text{RPM}}{5252} ]

In a constant-horsepower situation, as the speed (RPM) increases, the torque must decrease in order to maintain the same horsepower output. This is because horsepower is a constant value, and if the speed increases, the torque level must drop proportionately to keep the product of torque and speed equal to the constant horsepower.

Thus, the torque behavior is characterized by a decrease as speed increases. This principle is essential in applications where constant horsepower is maintained across varying speeds, such as in certain motor and drive applications.