55 - PVD 3622_GB_TM_January 2014.Docx
3.2.14.
Voltage withstand characteristics of TM series
The motors fed by converters are subject to higher stresses than in case of
sinusoidal power supply. The combination of fast switching inverters with cables will
cause overvoltage due to the transmission line effects. The peak voltage is
determined by the voltage supply, the length of the cables and the voltage rise time.
As an example, with a rise time of 200 ns and a 30 m (100 ft) cable, the voltage at
the motor terminals is twice the inverter voltage.
The insulation system of the torque motors TM is designed to withstand high
repetitive pulse voltages and largely exceeds the recommendations of the IEC/TS
60034-25 ed 2.0 2007-03-12 for motors without filters up to 690V AC (See figure 1).
Figure 1: Minimum Voltage withstands characteristics for motors insulations
according to IEC standards. At the top are the typical capabilities for the TM motors.
Note: The pulse rise times are defined in accordance with the IEC/TS 60034-17
ed4.0 2006-05-09.
The TM motors can be used with a supply voltage up to 690 V under the following
conditions:
The pulse rise times must be longer than 50 ns.
The repetitive pulse voltages must not exceed the values given in figure 1,
“
Curve TM motors
” in dark blue.
MOTOR PULSE WITHSTAND
CHARACTERISTIC CURVES
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
0
0.2
0.4
0.6
0.8
1
1.2
Voltage Pulse Rise Time (µs)
P
e
a
k
V
o
lt
a
g
e
(
k
V
)
Curve TM motors
Curve IEC 60034-25: <690V AC
Curve IEC 60034-25: <500V AC
Curve 60034-17: <500V AC
Summary of Contents for TM Series
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Page 57: ...57 PVD 3622_GB_TM_January 2014 Docx 3 3 1 2 Shaft Height 200 mm Thrust bearing 29424...
Page 61: ...61 PVD 3622_GB_TM_January 2014 Docx 3 3 2 2 Shaft Height 315 mm Thrust Bearing 29426...
Page 62: ...62 PVD 3622_GB_TM_January 2014 Docx 3 3 2 3 Shaft Height 315 mm Thrust Bearing 29430...
Page 66: ...66 PVD 3622_GB_TM_January 2014 Docx 3 3 3 2 Shaft Height 400 mm Thrust Bearing 29434...
Page 67: ...67 PVD 3622_GB_TM_January 2014 Docx 3 3 3 3 Shaft Height 400 mm Thrust Bearing 29440...
