Shaft power technology

Emotron shaft power monitors

The first monitors were developed in 1975 and the shaft power technology was patented in 1979.

 

The instantaneous shaft power supplied to the driven equipment, by the electrical motor, is supervised by measuring the input power and by calculating the motor power losses with a unique algorithm. The value of the real motor shaft power is then indicated in % of rated power, kW or HP.

• Shaft Power = Power In – Motor power loss

The technology allows direct sense of the motor/machine load and then e.g., immediately initiates an alarm when the load is too high or low. This also in view of the varying losses of the motor. The only way to achieve the same level of accuracy would be to use a very expensive torque transducer.

• This technology is of course used in our shaft power monitors but also built-in as a unique feature in both our softstarters and variable speed drives.

 

 

 Benefits of shaft power technology