Function overview
Page 57
5.2.2
Pulse width modulation (PWM)
The item servo positioning controller C 1-Series is able to vary the clock frequency in the current controller circuit.
In most cases the settings can be made using the parameterisation software item Motion Soft
. In order to minimize switching
losses, the clock of the pulse width modulation can be cut in half as compared to the frequency in the current controller circuit.
The item servo positioning controller C 1-Series also features a sine modulation or alternatively a sine modulation with third
harmonic. This increases the effective converter output voltage. The type of modulation can be selected via the item Motion
Soft
. The default setting is sine modulation.
Table 30:
Output voltage at the motor terminals in the case of a
DC bus circuit voltage (U
ZK
) of 360 V
Output voltage converter
Output voltage at the motor terminals
U
out,(sin)
U
LL,motor
= approx. 210 V
RMS
U
out,(sin+sin3x)
U
LL,motor
= approx. 235 V
RMS
5.2.3
Setpoint management
For speed controlled and torque controlled modes of operation, the setpoint can be set via a setpoint management.
Possible setpoint sources are:
3 analog inputs:
AIN 0, AIN 1 and AIN 2
3 fixed values:
1
st
value: setting depending on controller enabling logic:
fixed value 1 or
RS232 interface or
CANopen bus interface or
PROFIBUS-DP interface or
2
nd
and 3
rd
value: setting of fixed values 2 and 3
Process controller
SYNC input
Additional incremental encoder input [X10]
If no setpoint source is activated, the setpoint is zero.
The setpoint management has a ramp generator with a preceding adder. Any of the above-mentioned setpoint sources can be
selected via the corresponding selectors and run through the ramp generator. Additional sources can be selected as setpoints
using two more selectors. These, however, cannot be run through the ramp generator. The total setpoint is then a summation
of all values. The acceleration and deceleration times of the ramp are directionally parameterisable.
