Operating Instructions
SINAMICS G120 CU230P-2 Control Units
List Manual (LH9), 04/2014, A5E33838102B AA
183
2 Parameters
2.2 List of parameters
This is the reason that the output voltage can be increased using p1310.
The voltage boost can be used for both linear as well as square-law U/f characteristics.
Not for power units PM230, PM250, PM260:
For field orientation (p1302.4 = 1, default setting for p0096 = 1), in the vicinity of low output frequencies, a minimum
current is impressed with the magnitude of the rated magnetizing current.
For p1310 = 0%, a current setpoint is calculated that corresponds to the no-load case. For p1610 = 100 %, a current
setpoint is calculated that corresponds to the rated motor current.
Dependency: The starting current (voltage boost) is limited by the current limit p0640.
The accuracy of the starting current depends on the setting of the stator and feeder cable resistance (p0350, p0352).
Refer to: p1300, p1311, p1312, r1315
Notice: The starting current (voltage boost) increases the motor temperature (particularly at zero speed).
Note: The starting current as a result of the voltage boost is only effective for U/f control (p1300).
The boost values are combined with one another if the permanent voltage boost (p1310) is used in conjunction with
other boost parameters (acceleration boost (p1311), voltage boost for starting (p1312)).
However, these parameters are assigned the following priorities: p1310 > p1311, p1312
For field orientation (p1302.4 = 1, not PM230, PM250, PM260), p1311 and p1312 of the voltage boost are also added
in the direction of the load current (non-linear).
Description: p1311 only results in a voltage boost when accelerating and generates a supplementary torque to accelerate the
load.
The voltage boost becomes effective for a positive setpoint increase and disappears as soon as the setpoint has
been reached. The build-up and withdrawal of the voltage boost are smoothed.
The magnitude of the boost in Volt at a frequency of zero is defined as follows (not for field orientation):
Voltage boost [V] = 1.732 * p0305 (rated motor current [A]) x r0395 (stator/primary section resistance [ohm]) x p1311
(voltage boost when accelerating [%]) / 100 %
Dependency: The current limit p0640 limits the boost.
For field orientation (p1302 bit 4 = 1, not PM230, PM250, PM260), p1311 is preassigned by the automatic
calculation.
Refer to: p1300, p1310, p1312, r1315
Notice: The voltage boost results in a higher motor temperature increase.
Note: The voltage boost when accelerating can improve the response to small, positive setpoint changes.
Assigning priorities for the voltage boosts: refer to p1310
For field orientation (p1302 bit 4 = 1, not PM230, PM250, PM260), p1311 of the voltage boost are also added in the
direction of the load current (non-linear).
Description: Setting for an additional voltage boost when powering-up, however, only for the first acceleration phase.
The voltage boost becomes effective for a positive setpoint increase and disappears as soon as the setpoint has
been reached. The build-up and withdrawal of the voltage boost are smoothed.
Dependency: The current limit p0640 limits the boost.
Refer to: p1300, p1310, p1311, r1315
Notice: The voltage boost results in a higher motor temperature increase.
p1311[0...n] Starting current (voltage boost) when accelerating / I_start accel
Access level: 2 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: 6300, 6301
Min Max Factory setting
0.0 [%] 250.0 [%] 0.0 [%]
p1312[0...n] Starting current (voltage boost) when starting / I_start start
Access level: 2 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: 6300, 6301
Min Max Factory setting
0.0 [%] 250.0 [%] 0.0 [%]