Parker K Series, Technical Manual

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25 - PVD 3674_GB_K Series_CE-November 2016.Docx
3.2.10. Electric time constant & Mechanical time constant
With following values given in the kit data sheet:
L
ph_ph
inductance of the motor phase to phase [H],
R
ph_ph
resistance of the motor phase to phase at 25°C [Ohm].
J inertia of the rotor [kgm²],
K
b
Voltage constant [V/rad/s]
Ke
ph_ph
back emf coefficient phase to phase [V
rms
/
rad/s
] =K
b
/

2
Electric time constant: Mechanical time constant:
ph ph
ph ph
elec
R
L
_
_


2
_
_
) (
* * 5 . 0
ph ph
ph ph
mech
Ke
J R


Hereunder is given an overall summary of kit time constants:
Type
Electric time
constant [ms]
Mechanical time
constant [ms]
K032050_EY
0.5 1.1
K032100_EY
0.8 0.8
K032200_EY
1 0.6
K044050_EY
0.7 1.2
K044100_EY
1.1 0.8
K044200_EY
1.4 0.6
K064050_EY
1.2 1.3
K064100_EY
1.8 0.8
K064200_EY
2.5 0.6
K089050_9Y
1.5 1.4
K089100_9Y
2.3 1
K089200_9Y
3.1 0.7
K178050_EY
3.8 1.1
K178100_EY
6.2 0.7
K178200_EY
8.9 0.5