Electric Motor Torque Power Curve

T rated torque nm p kw rated power kw n r rated rotational speed rpm example electrical motor and braking torque.

Electric motor torque power curve.

Speed of the output shaft. The torque available at this point is called pull up torque. It is generally known as motor characteristic curve. Different electric motor has different characteristics and it can be observed by its torque vs.

This also is not very useful except it will determine the maximum available torque. The driving force of an electric motor is torque not horsepower. By overlaying the torque speed curve of a pump and a motor one can verify that the motor is producing enough accelerating torque to drive the pump to full speed as shown below. Thankfully in electric motors maximum torque is produced from the get go.

The pattern remains same for different hp ratings. As the motor picks up speed torque decreases slightly to the lowest point shown on the curve above. The torque of a 60 hp motor rotating at 1725 rpm can be calculated as. Pull up torque put this term is used for the lowest point on the torque speed curve for an electric motor which is accelerating a load up to full speed.

As a current flows through the electric motor a related electrical charge causes an armature to rotate. In use the motor is driving a propeller. The power produced by the motor depends on the speed of the motor and is zero at 0 speed and. Below is the typical ac induction motor characteristics.

The graph above shows a torque speed curve of a typical d c. Motor characteristics are frequently given as two points on. For every motor there is a specific torque speed curve and power curve. In other words there is a tradeoffbetween how much torque a motor delivers and how fast the output shaft spins.

T fl 5252 60 hp 1725 rpm 182 7 lb ft. In this overlay the shaded area reflects the accelerating torque available from the motor to drive the pump. The power band of an internal combustion gasoline automobile engine typically starts at midrange engine speeds around 4 000 rpm where maximum torque is produced and ends close to the redline after reaching maximum power between 5 000 and 6 500 rpm.