The Torque–Speed Characteristics of a motor describe the relationship between the torque produced by a motor and its rotational speed. At starting, the motor develops a high starting torque while its speed is zero; as the motor accelerates, the speed increases and the available torque generally decreases. The characteristic curve helps engineers understand starting performance, acceleration, load handling, stability, and the operating point of a motor under different loads.
⚙️ Torque–Speed Characteristics of an Induction Motor
Explore how motor torque changes as rotor speed and load conditions change.
Torque characteristic
Operating point
Synchronous speed
📊 Motor Parameters
Synchronous Speed
1500 rpm
Rotor Speed
1200 rpm
Slip
20.0%
Electromagnetic Torque
— N·m
Relative Speed
300 rpm
At normal operating speed, the rotor runs slightly below
synchronous speed. The difference creates slip and allows
electromagnetic torque to be produced.