50 - PVD 3622_GB_TM_January 2014.Docx
3.2.10.
Time constants of the motor
3.2.10.1. Electric time constant:
ph
ph
ph
ph
elec
R
L
_
_
With following values given in the motor 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].
Example:
Motor series TMW306LF
L
ph_ph
= 0.942 mH or 0.942.10
-3
H
R
ph_ph
at 25°C = 0.0778 Ohm
elec
= 0.942E-3/0.0778=
12.1 ms
An overall summary of motor time constants is given a little further.
3.2.10.2. Mechanical time constant:
3
*
)
3
*
3
(
*
*
5
.
0
*
*
_
_
_
_
_
ph
ph
ph
ph
ph
ph
n
ph
n
ph
mech
Ke
Ke
J
R
Ke
Kt
J
R
2
_
_
)
(
*
*
5
.
0
ph
ph
ph
ph
mech
Ke
J
R
With following values obtained from the motor data sheet:
R
ph_ph
resistance of the motor phase to phase at 25°C [Ohm],
J
inertia of the rotor [kgm²],
Ke
ph_ph
back emf coefficient phase to phase [V
rms
/
rad/s
].
The coefficient
Ke
ph_ph
in the formula above is given in [V
rms
/rad/s]
To calculate this coefficient from the datasheet, use the following relation:
60
1000
*
*
2
]
1000
/
[
_
]
/
/
[
_
rpm
V
ph
ph
s
rad
V
ph
ph
rms
rms
Ke
Ke
Example:
Motor series TMW306LF
R
ph_ph
at 25°C = 0.0778 Ohm
J = 4.55 kgm²
Ke
ph_ph
[V
rms
/
1000rpm
] = 1030 [V
rms
/
1000rpm
]
Ke
ph_ph
[V
rms/rad/s
] = 1030/(2*
*1000/60) = 9.835 [V
rms/rad/s
]
mech
=0.5*0.0778*4.55/(9.835²) =
1.8 ms
Содержание TM Series
Страница 1: ...1 PVD 3622_GB_TM_January 2014 Docx Torque Motors TM Series Technical Manual PVD 3622...
Страница 57: ...57 PVD 3622_GB_TM_January 2014 Docx 3 3 1 2 Shaft Height 200 mm Thrust bearing 29424...
Страница 58: ...58 PVD 3622_GB_TM_January 2014 Docx 3 3 1 3 Shaft Height 200 mm Without Thrust Bearing With Ball Bearing...
Страница 59: ...59 PVD 3622_GB_TM_January 2014 Docx 3 3 1 4 Shaft Height 200 mm Without Thrust Bearing With Roller Bearing...
Страница 61: ...61 PVD 3622_GB_TM_January 2014 Docx 3 3 2 2 Shaft Height 315 mm Thrust Bearing 29426...
Страница 62: ...62 PVD 3622_GB_TM_January 2014 Docx 3 3 2 3 Shaft Height 315 mm Thrust Bearing 29430...
Страница 63: ...63 PVD 3622_GB_TM_January 2014 Docx 3 3 2 4 Shaft Height 315 mm Without Thrust Bearing With Ball Bearing...
Страница 64: ...64 PVD 3622_GB_TM_January 2014 Docx 3 3 2 5 Shaft Height 315 mm Without Thrust Bearing With Roller Bearing...
Страница 66: ...66 PVD 3622_GB_TM_January 2014 Docx 3 3 3 2 Shaft Height 400 mm Thrust Bearing 29434...
Страница 67: ...67 PVD 3622_GB_TM_January 2014 Docx 3 3 3 3 Shaft Height 400 mm Thrust Bearing 29440...
Страница 68: ...68 PVD 3622_GB_TM_January 2014 Docx 3 3 3 4 Shaft Height 400 mm Without Thrust Bearing With Ball Bearing...
Страница 69: ...69 PVD 3622_GB_TM_January 2014 Docx 3 3 3 5 Shaft Height 400 mm Without Thrust Bearing With Roller Bearing...