VD500 Series Inverter User Manual Parameter Description
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A1-03
PWM Modulation Mode
LED unit’s digit:
0: Asynchronous modulation
1: Synchronous modulation
LED ten’s digit:
0: Two phase and three phase
modulation
1: Three phase modulation
0x00
◎
Only valid for V/F control.
Synchronization modulation, refers to the carrier frequency linear changes with the output frequency
change to ensure that both ratio (carrier ratio) not chance, generally used in the output frequency is
higher, is conductive to the quality of the output voltage.
At low output frequency (below 100Hz), it is generally not required to be synchronized modulation,
because the ratio of carrier frequency and the output frequency is high, the asynchronous modulation
advantages is more obvious.
When the running frequency is higher than 85Hz, the synchronization modulation is effective, the
frequency of the following fixed for asynchronous modulation mode.
A1-04
Dead Zone
Compensation Mode
Selection
0: Without compensation
1: Compensation 1
2: Compensation 2
1
○
Generally do not need to modify the parameters, only in the quality of the output voltage waveform
have special requirements, or the motor is abnormal oscillation, such as motor, need to try to switch to
select different compensation mode.
High-power is recommended for use with compensation mode 2.
A1-05
Random PWM Depth
0: Random PWM invalid
1~10: PWM carrier frequency random
depth
0
○
Set up random PWM, can make the motor sound of the monotonous grating becomes more soft, and
can help for to reduce the external electromagnetic interference.
When the random PWM depth is 0, the random PWM is invalid. Adjust the random PWM different
depth will get different results.
A1-06
Rapid Current Limiting
Enable
0: Disable
1: Enable
1
○
Use rapid current limiting function, can maximum limit reduce inverter appear overcurrent fault,
ensure the inverter uninterrupted running.
If the frequency inverter in rapid current limiting condition for a long time, frequency inverter could
overheat and other damage, this situation is not allowed, so the frequency inverter will alarm fault Err.
38 when for a long time fast current limiting, said inverter overload and need to stop.
A1-07
Current Detection
Compensation
0~100
5
○
Used to set the current detection compensation of inverter, set too large may lead to a decrease in
control performance.
Generally do not need to modify.
