Chapter 6 A5 control optimization
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determined. Below this value is the 7-segment continuous modulation mode, and the
opposite is the 5-segment intermittent modulation mode.
In the case of 7-segment continuous modulation, the switching loss of the inverter is
large, but the current ripple is small; in the 5-segment intermittent debugging mode, the
switching loss is small and the current ripple is large; but at high frequencies, it may
cause The instability of the motor operation generally does not need to be modified.
Please refer to function code P3-11 for VF operation instability. For function loss and
temperature rise, please refer to function code P0-15.
A5-01
PWMModulation
0
：
Asynchronous modulation 1:
synchronous modulation
Default
：
0
Only valid for VF control. Synchronous modulation means that the carrier frequency
changes linearly with the output frequency conversion, ensuring that the ratio (carrier
ratio) of the two is constant, and is generally used when the output frequency is high,
which is beneficial to the output voltage quality.
At lower output frequencies (below 100 Hz), synchronous modulation is generally not
required because the ratio of carrier frequency to output frequency is higher at this time,
and the advantage of asynchronous modulation is more obvious.
When the running frequency is higher than 85 Hz, the synchronous modulation takes
effect, and the frequency is fixed below the asynchronous modulation mode.
A5-02
Dead
zone
compensation
mode
selection
0: No compensation 1: Compensation
mode 1
2: Compensation mode 2
Default
：
1
This parameter generally does not need to be modified. Only when there is a special
requirement for the quality of the output voltage waveform, or when the motor has an
abnormality such as oscillation, it is necessary to try to switch to select different
compensation modes. Compensation mode 2 is recommended for high power.
A5-03
Random PWM depth
0
：
Invalid 1~10: Random PWM Depth
Default
：
0
By setting a random PWM, the monotonous and harsh motor sound can be softened
and it can help reduce external electromagnetic interference. When the random PWM
depth is set to 0, the random PWM is invalid. Adjusting the random PWM different
depths will give different effects.
A5-04
Fast current limiting
0
：
Invalid 1: Valid
Default
：
1
Enable the fast current limiting function to minimize the overcurrent fault of the inverter
and ensure the uninterrupted operation of the inverter. If the inverter continues to be in
the fast current limit state for a long time, the inverter may be damaged by overheating,
etc. This situation is not allowed.
，
Therefore, when the inverter is quickly limited for a long time, it will alarm Err40, indicating
that the inverter is overloaded and needs to stop.
A5-05
Current
detection
compensation
0
～
100
Default
：
5
It is used to set the current detection compensation of the inverter. If the setting is too
large, the control performance may be degraded. Generally do not need to be modified.
A5-06
Undervoltage setting
60.0%
～
140.0%
Default
：
100.0%
