What type of torque is required to produce the nameplate-rated output power and speed while driving a load?

The nameplate-rated output power and speed of a motor indicate the maximum performance it is designed to achieve under normal operating conditions. To produce this rated performance while driving a load, a specific amount of torque is necessary. This torque is referred to as full-load torque.

Full-load torque is the amount of torque that the motor can continuously supply when it is operating at its rated load. It is calculated based on the power output and the speed at which the motor operates. This ensures that the motor can handle the load without overheating or suffering mechanical failure.

In contrast, locked-rotor torque pertains to the torque generated when the rotor is at a standstill, which is not the same as the torque required when the motor is operating at full load. Breakdown torque is the maximum torque a motor can generate before it stalls, often exceeding the full-load torque but not applicable in the context of steady operation. Pull-up torque is relevant during the startup phase when the motor must increase speed from zero to its operating level and may be lower than full-load torque.

Understanding full-load torque is crucial for selecting motors for applications where it’s essential to meet operational demands consistently and effectively.