Direct Drive Feed Roll Motor for Grinding Industry
The feeder motors adjust the amount of grain from the raw material coming to the mill rollers. It is important to transfer the desired amount of raw material to the roller mill. This stability improves the grinding quality and performance of the processed material.

EMF Motor is an international company to give support to of the machine builders and end users at every point in the world. SQM is permanent magnet brushless motor, working after a patented motor principle, suitable for low speed and high torque gearless applications.

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Feed Roll Motor
File Size: 625 kb
File Type: pdf
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Advantages of the EMF Motor
  • High performance even at low speeds (e.g. 1 to 200 rpm high performance working)
  • Energy saving up to 30%
  • Direct drive (No gearbox, no need maintenance and lubrication)
  • Servo performance with simple V/f driver
  • No cooling (No fan)
  • Minimum failure risk due to not contain mechanical parts
  • Minimize the wearing of the machine in long term
  • Not allow the probability of accumulation and clogging of the raw material in the nozzle with high performance response.
  • Constant Torque from standstill to full speed

Sample calculation for Feeder Motor

Asynchronous motors and gearbox are used as a feeder motor of the classical roller machine systems.
AC Motor and Gearbox
0,75 kW
Motor efficiency
75 %
Gearbox efficiency
80 %
Total efficiency
60 %
Input power
1,0 kW
Output power ​​
0,60 kW
According to the same system power

Energy consumption difference 0,29 kW
Saving Ratio 29 %

** Two motor for every milling machine
*** 360 days, 24 hours working
SQM Torque Motor
0,60 kW
Motor efficiency
85 %
Gearbox efficiency
100 %
Total efficiency
85 %
Input power
0,71 kW
Output power ​​
0,60 kW
Energy Saving per machine *
0,59 kW/h
Energy cost
​0,12 EU
Daily Energy Saving **
1,69 EU
Yearly Energy Saving
610 EU