Electric Motor Torque Curve

1 lb ft 1 355 nm torque converter.

Electric motor torque curve.

Torque nm speed rpm electric motor speed vs. The torque delivered from an electrical motor producing 0 75 kw 750 w at speed 2000 rpm can be calculated as. In imperial units the full load torque can be expressed as. As the motor picks up speed torque decreases slightly to the lowest point shown on the curve above.

For completeness only in this graph is represented also the output power curve in w y4 axis. Power kw torque nm example torque from an electrical motor. You ll all be familiar with the look of a torque curve. A small mound compared to a power curve s steep incline.

Motor characteristics are frequently given as two points on this graph. T 9550 pkw nr 2 where. In this overlay the shaded area reflects the accelerating torque available from the motor to drive the pump. In this case unless external limitations are applied the maximum torque is achieved at low rpm.

In other words there is a tradeoff between how much torque a motor delivers and how fast the output shaft spins. Slowly ascending upwards before peaking and dropping back down. T full load torque lb ft php rated horsepower. In the technical data sheets the output power curve is not present.

For example the ac motor found in the tesla roadster 2008 produces near constant maximum torque from 0 to about 6000 rpm while maximum power occurs at about 10000 rpm long after torque begins to drop off. 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. 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. Nr rated rotational speed rev min rpm in metric units the rated torque can be expressed as.

Like pumps motors produce a torque speed curve of their own. In the first cartesian dial are shown the torque in nm x axis the rotation speed in rpm y1 axis the current consumption in a y2 axis the efficiency y3 axis. Note that torque is inversely proportioal to the speed of the output shaft. T 5252 php nr 1 where.

For every motor there is a specific torque speed curve and power curve. The torque available at this point is called pull up torque.