5.3 Operation on foreign converters
Principally, operating MS2N motors on foreign converters is possible. The fol-
lowing requirements and limitations on foreign converters must be observed.
Danger of explosion or material damage due to
overload!
WARNING
Observe the following requirements for safe motor operation on foreign convert-
ers. Connection of all necessary sensors and additional devices for a safe opera-
tion and their evaluation lies in the sole responsibility of the plant manufacturer
or operator.
Requirements on the power output stage
●
Converter with pulse width modulation
●
Pulse frequency 4 kHz …16 kHz
Voltage load of the motor
During converter operation, the motor underlies a higher voltage load (insulation
system, bearing) than on a sinusoidal source voltage only.
Standard values for peak voltage and rate of rise of voltage:
●
Peak voltage U
pk
on motor clamps ≤ 1.56 kV
●
Rate of rise of voltage du/dt ≤ 5 kV/μs
Maximum allowed limit load:
In the case of critical rate of rise of off-state voltage du/dt ≥ 5 kV/µs, the limit
values (peak voltage, voltage rise time) according to limit curves A according to
DIN VDE 0530-25 (VDE 0530-25):2009-08 (Figure 14 Limit curve A) must be
kept. Therefore, observe the limit values for voltage rise time and critical rate of
rise of off-state voltage.
Limit values for voltage rise time and critical rate of rise of off-state voltage:
●
Voltage rise time > 0.17 µs
●
Critical rate of rise of off-state voltage du/dt < 8 kV/µs
Monitoring functions
●
Speed monitoring of maximum permissible speed
●
The motor load must not exceed the permitted continuous operation charac-
teristic curve. The converter setting data for controlling and monitoring must
comply with the type code data.
●
Temperature control to protect from thermal overload
– The temperature sensor of the motor winding must be connected and eval-
uated on the converter (ensure monitoring function, observe polarity of
temperature sensor, limit switch-off temperature according to
4.2.3 "Thermal motor protection" on page 13
).
MS2N Synchronous Servomotors
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Operating conditions and handling
R911347581_Edition 04 Bosch Rexroth AG
Summary of Contents for Rexroth MS2N
Page 1: ...MS2N Synchronous Servomotors Operating Instructions R911347581 Edition 04 ...
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Page 103: ...MS2N Synchronous Servomotors 81 101 R911347581_Edition 04 Bosch Rexroth AG ...
Page 120: ...98 101 MS2N Synchronous Servomotors Bosch Rexroth AG R911347581_Edition 04 ...
