Parker Aries AR-04CE - Energy to Dissipate in the External Power-Dump Resistor

Parker Hannifin
- 92 – Aries Controller Hardware Installation Guide
Energy to Dissipate in the External Power-Dump
Resistor
To stop a motor, kinetic and potential energy must go somewhere. Through
the previous calculations, you have determined the total kinetic and potential
energy, and the energy lost to various paths.
From the total kinetic and potential energy, subtract the energy dissipated
through the drive capacitors, motor windings, and load loss. If the copper
losses (E
W
) or load losses (E
L
) are not easily determined, you can
conservatively assume they are zero (Ø).
The resulting sum represents the power for dissipation in an external power
dump resistor.
LWCPKR
EEEEEE
−
−
−
+
=
Where
E
R
= energy to be dissipated in the external resistor (Joules)
E
K
= rotational kinetic energy (Joules)
E
P
= potential energy (Joules)
E
C
= energy that can be absorbed by the drive capacitors (Joules)
E
W
= energy dissipated in the motor windings (Joules) – copper losses
E
L
= energy dissipated by the load (Joules) – load losses