Eaton MMX34AA9D0 Series User Manual

04/10 MN04020001Z-EN
Motor and Application
29
Motor and circuit type
The motor’s stator winding can be connected in a star or delta
configuration in accordance with the rated operational data on the
nameplate.
The three-phase motor with the rating plate based on figure 13,
can be run in a star or delta connection.
The operational characteristic curve is determined by the ratio of
motor voltage and motor frequency in this case.
87-Hz Characteristic curve
In the delta circuit with 400 V and 87 Hz, the motor in figure 13
was released with 3 times-fold output (~ 1.3 kW).
Because of the higher thermal loading, only utilizing the next
higher motor output according to the list (1.1 kW) is
recommended. The motor (in this example) therefore still has
1.47-fold higher output compared with the listed output
(0.75 kW).
With the 87-Hz characteristic curve, the motor also works in the
range from 50 to 87 Hz with an unattenuated field. The pull-out
torque remains at the same level as in mains operation with 50 Hz.
The following table 2 shows the allocation of possible frequency
inverters depending on the mains voltage and the type of circuit.
Table 2: Assignment of frequency inverters to example motor circuit (figure 15)
Figure 13: Example of a motor ratings plate
Figure 14: Circuit types: Star, Delta
/ 400 V230
3.5 / 2
0,75S1
0.79
ϕ
cos
kW
rpm
1430 50 Hz
A
U1 V1 W1
W2 U2 V2
U1 V1 W1
W2 U2 V2
h
The heat class of the motor must be at least F in 87-Hz
operation.
Figure 15: U/f-characteristic curve
a Star connection: 400 V, 50 Hz
b Delta connection: 230 V, 50 Hz
c Delta connection: 400 V, 87 Hz
0
8750
400
U
2
[V]
f [Hz]
f
max
230
ac
b
Frequency inverters MMX12AA3D7… MMX32AA3D7… MMX34AA2D4… MMX34AA4D3…
Rated operational
current
3.7 A 3.7 A 2.4 A 4.3 A
Mains voltage
1 AC 230 V 3 AC 230 V 3 AC 400 V 3 AC 400 V
Motor circuit
Delta Delta Star Delta
U/f-characteristic curve b b a c
Motor current 3.5 A 3.5 A 2.0 A 3.5 A
Motor voltage 3AC 0-230V 3AC 0-230V 3AC 0-400V 3AC 0-230V
Motor speed 1430 min
-1
1430 min
-1
1430 min
-1
2474 min
-1 1)
Motor frequency 50 Hz 50 Hz 50 Hz 87 Hz
1)
1) Note the permitted limit values of the motor!

Eaton MMX34AA9D0 Series Specifications

General

Brand	Eaton
Model	MMX34AA9D0 Series
Category	DC Drives
Language	English