Siemens SIMATIC EM 148-FC, Руководство пользователя

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Functions and Technical Specifications
4-15
EM 148-FC Frequency Converter
A5E00065321-03
Starting boost
This parameter controls the voltage/frequency characteristic of the frequency
converter. When the motor starts, the motor voltage is increased until the motor
current exceeds the motor’s rated current by the value specified here.
Consequently, a higher ramp-up torque can be achieved.
Starting boost
0
U
N
A
f
f
N
Figure 4-4 Voltage/frequency characteristic with and without starting boost
Continuous boost
This parameter controls the voltage/frequency characteristic of the frequency
converter. Until the motor’s rated voltage is reached, the motor voltage is
increased until the motor current exceeds the motor’s rated current by the value
specified here. Consequently, a high acceleration torque can be achieved up to the
rated frequency.
Continuous
boost
0
U
N
A
f
f
N
Figure 4-5 Voltage/frequency characteristic with and without continuous boost