Advantech Automation1 XC4, Hardware Manual

Page: 21 / 120

1.1.1. System Power Requirements
The following equations can be used to determine total system power requirements. The actual power
required from the mains supply will be the combination of actual motor power (work), motor resistance
losses, and efficiency losses in the power electronics or power transformer.
Use an EfficiencyFactor of approximately 90% in the following equations.
Brushless Motor
Output Power
Rotary Motors Power Output [W] = Torque [N·m] * Angular velocity[rad/sec]
Linear Motors Power Output [W] = Force [N] * Linear velocity[m/sec]
Rotary or Linear Motors Power Output [W] = Bemf [V] * I(rms) * 3
Power Loss = 3 * I(rms)^2 * R(line-line)/2
Power Input = (Power Power Loss) / EfficiencyFactor
DC Brush Motor
Power Output [W] = Torque [N·m] * Angular velocity[rad/sec]
Power Loss = I(rms)^2 * R
Power Input = (Pout + Ploss) / EfficiencyFactor
XC4 Hardware Manual 1.1.1. System Power Requirements
www.aerotech.com 21