SIEB & MEYER FC2, Manual

Page: 26 / 73

The power bridge rectifier rectifies the mains voltage. Then it is supplied as fix DC
voltage to the capacitors of the first DC link. This ensures that only active power is
withdrawn from the mains (no need for reactive power).
The fix DC link voltage is transformed to a second DC link by means of the power
DC/DC converter (IGBT technology). The produced DC voltage is proportional to the
required motor voltage. The high clock frequency of the DC/DC converter (12 kHz)
ensures very good control dynamics and stability of the motor voltage.
The DC voltage produced in the second DC link is inverted by means of the power
output stages and supplied to the motor via the output terminals. The motor frequency
and the switching frequency of the power output stages are proportional. This avoids
beats in the motor current.
The frequency converter technology (PAM) described in this manual meets all require‐
ments in the field of converter-operated high speed motors and offers the advantage of
loss minimization in the motor and frequency converter.
Pulse modulation methods:
▶ PAM: pulse amplitude modulation
▶ PWM: pulse width modulation
If a motor is decelerated faster than by natural friction losses, the motor works as
generator. The energy fed back during generator operation is converted to heat by a
ballast circuit integrated in the frequency converter.
The following possibilities are provided for operation and parameterization of the FC2:
▶ analog reference value setting
▶ the Windows based software
drivemaster2 for the connection to a common PC
▶ customized user interfaces (on demand)
▶ serial interface RS232 or RS485
▶ SERVOLINK 3 and SERVOLINK 4 for the connection to a SIEB & MEYER CNC
for PCB processing (in the making)
▶ EtherCAT slave interface for real-time requirements
Description of the Device
W
26 FC2 - Frequency converter 02192100xy
5