Tt Control Parameters (Group Pa) - V&T E5 Series User Manual

6.TT Control Parameters (Group PA)

PA.00
PA.0T
Switching frequency has an important impact on operations of inverter and motor. When switching
frequency increases, the motor loss, motor temperature rising and motor noise will be decreased. If
switching frequency decreases, the inverter temperature rising, the leakage current of motor and external
radiation interference will be decreased.
PA.0T can determine automatically the suitable carrier frequency according to inverter temperature.
0: Non−auto adjustment, switching frequency will not be adjusted automatically. Under favorable
circumstances as regards ventilation and heat sink, all loads need to be operated with low noise,
setting higher switching frequency PA.00 and setting PA.0T to 0.
T: Auto−adjustment, adjust automatically switching frequency through temperature check according to
the load. Maintain continuously reliable operation by keeping operating with low noise at light load
and excellent effect of inverter temperature rising at heavy load.
Note:
The default value of PA.0T is T in E5−H series, the default value of PA.0T is 0 in E5−A series.
PA.0T
The function is used to keep the motor speed constant if load fluctuation or under heavy load.
PA.03
When several inverters drive one load, the function can distribute the load automatically between
inverters and make them work cooperatively. For example, when some inverters run an assembly line,
this function can be used to balance loads, allocate loads between inverters at different power levels in
proportion to the power, and thus ensure the assembly line operate properly. Each inverter adjusts
output frequency automatically according to its load condition and lifting ratio set by droop control.
PA.04
PA.05
PA.04 current limit selection:
0: Disabled
T: Enabled
The current limit function is used to prevent the output current exceeds the current limit level (PA.05).
The function is especially applied to applications of suddenly changed speed or load.
E5 Series High Performance Universal Inverter
Switching frequency
Switching frequency automatic adjustment
Slip compensation
Figure 6−34 Slip compensation gain
Droop control
Current limit selection
Current limit level
Chapter 6 Parameter Descriptions
User's Manual
0.7 ~ T6.0 kHz (Factory)
0 ~ T(T)
0.0 ~ 300.0 % (T00.0%)
0.00 ~ T0.00 Hz (0.00Hz)
0 ~ T(T)
T0.0 ~ T00.0 % (T60.0%)
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