HEIDENHAIN MANUALPLUS 620 - Page 1081

January 2012 6.20 Commissioning 1081
Determining data
for synchronous
motors
The motor data for synchronous motors are entered in the motor table after
some conversions using the values from the motor data sheet of the
respective manufacturer (here using the example of a SIEMENS motor).
Values in the HEIDENHAIN motor table Values from the motor data sheet
TYPE: SM Permanently excited synchronous motor
NAME: 1FT6044-4AF7 1FT6044-4AF7
MODE: 0
Rated current
I-N in [A
eff
] winding
I-N: 2.9
Data sheet value Irated (100 K)
IN = 2.9 A
Rated voltage
U-N in [V
eff
] interlinked
U-N: 340
Calculation from data sheet values n
noml
, k
E
, R
Str
,
I
noml (100 K)
, L
D
:
U
e
= (n
noml
/ 1000) ⋅ (k
E
/ √ 3)
U
e
= (3000 / 1000) ⋅ (108 / √ 3)
U
e
= 187.06 V
eff L,N
U
r
= RStr ⋅ I
noml (100 K)
U
r
= 3.05 ⋅ 2.9
U
r
= 8.85 V
eff L,N
U
x
= 2 ⋅ π ⋅ (n
noml
/ 60) ⋅ PZ ⋅ (LD / 1.5) ⋅ I
noml (100 K)
U
x
= 2 ⋅ π ⋅ (3000 / 60) ⋅ 2 ⋅ (0.016 / 1.5) ⋅ 2.9
U
x
= 19.44 V
eff L,N
U-N = 341 V
eff L,L
Rated speed
N-N in [min
–1
]
N-N: 3000
Data sheet value n
noml
N-N = 3000 min
–1
Rated frequency
F-N in [Hz]
F-N: 100
Calculation from data sheet value n
noml
F-N = (n / 60) ⋅ PZ
F-N = (3000 / 60) ⋅ 2
F-N = 100 Hz
No-load voltage at rated speed
U0 in [V
eff
] interlinked
U0: 324
Calculation from data sheet value n
noml
and k
E
t
U0 = (n
noml
/ 1000) ⋅ k
E
U0 = (3000 / 1000) ⋅ 108
U0 = 324 V
eff L,L
No-load current
I0 in [A
eff
] winding
I0: 3
Data sheet value I
0 (100 K)
I0 = 3 A
eff
Stator resistance at 20 °C
R1 in [mΩ] at 20° C
R1: 3050
Data sheet value R
Str
R1 = 3050 mΩ
Rotor resistance at 20 °C
R2 in [mΩ] at 20° C
R2: 0
U-N 3 U
e
U
r
+()
2
U
x
2
+⋅=
U-N 3 187,06 8,85+()
2
19,44
2
+⋅=