Electric Motor Torque Speed Curve

In this diagram t represents the nominal full load torque of the motor.

Electric motor torque speed curve. Figure 7 shows the torque speed characteristic as it might actually appear. The universal motor torque speed characteristic follows 1 x 2 relationship. The starting torque is indicated on the torque speed curve shown above. Zero at 0 speed and.

It is easier to show the relationship in the form of a curve fig. Torque speed plots in the motoring region. Figure 1 provides a graphical illustration of these changes. The power produced by the motor depends on the speed of the motor and is.

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. Common features of interest are noted and discussed below. Like pumps motors produce a torque speed curve of their own. 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.

The plots below show a number of different torque speed curves due to differences in the motor designs. The accuracy of the induction motor model has limitations and the actual torque speed characteristic is somewhat more complicated than the model predicts. The induction motor torque speed curve is typical of this type of motor having a low starting torque and a peak torque just below. Torque speed curve the torque developed by a conventional 3 phase motor depends on its speed but the relation between the two cannot be represented by a simple equation.

The x axis is motor speed from 0 to 120 hertz. Motor torque speed curve is a very good approximation. When the speed of an ac motor is controlled by a vfd hp or torque will change depending on the change in frequency. Overlaying torque speed curves to match motors to pumps.

The power is just peaking at around 6000rpm. One is a plot of empirical data and the other was plotted mechanically using a device developed at mit. In this case the relatively large starting torque is achieved with realistic current values. The motoring region of the induction machine torque speed curve is the region of greatest interest.

The full torque from zero speed is a major advantage for electric vehicles. The y axis is the percent of hp and torque. The motor region of the torque speed curve. At 60 hertz base motor speed both hp and torque are at 100 percent.

In this overlay the shaded area reflects the. The torque is the twisting force that makes the motor running and the torque is active from 0 to 100 operating speed. The linear model of a d c.