System Power Requirements - Aerotech Npaq DL 4010 Series Hardware Manual

Introduction

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.
For switching amplifier types:
An EfficiencyFactor of approximately 90% should be used in the following equations.
Brushless Motor
Output Power
Rotary Motors
Linear Motors
Rotary or Linear Motors
Ploss = 3 * I(rms)^2 * R(line-line)/2
Pin = SUM ( Pout + Ploss ) / EfficiencyFactor
DC Brush Motor
Pout [W] = Torque [N·m] * Angular velocity[rad/sec]
Ploss = I(rms)^2 * R
Pin = SUM ( Pout + Ploss ) / EfficiencyFactor
For linear amplifier types:
An EfficiencyFactor of approximately 50% should be used in the following equations.
Linear Motor
Pdiss[W] = MotorCurrentPeak[A] * TotalBusVoltage[V] * 3 / 2
Pin = SUM ( Pdiss ) / EfficiencyFactor
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Pout [W] = Torque [N·m] * Angular velocity[rad/sec]
Pout [W] = Force [N] * Linear velocity[m/sec]
Pout [W] = Bemf [V] * I(rms) * 3
Chapter 1
Npaq® Hardware Manual
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