151
DPWM switching upper limit
frequency
5.00Hz~max output frequency
It is only effective for VF control. Generally, it does not need to be modified.
The modulation mode of asynchronous motor is determined by the VF wave generation mode. When the value
is lower than PC-55, the switching loss of inverter is large, but the current ripple is small; When it is larger than
PC-55, it is opposite, but it is easy to cause unstable operation of motor at high frequency.
When VF control operation is unstable, please refer to parameter P5-17. For inverter loss and temperature rise,
please refer to PC-67.
0: Random PWM invalid
1~10: PWM carrier frequency random depth
When the random PWM depth is set to 0, the random PWM is invalid.
By adjusting the random PWM depth, the monotonous and harsh sound of the motor can be softened and the
external electromagnetic interference can be reduced.
Dormancy frequency PC-59~max output
frequency P0-13
0.00Hz~wake up frequency PC-57
This set of parameters is used to realize the dormancy and wake-up function in water supply application.
During the operation of the inverter, when the set frequency is less than or equal to Dormancy frequency
(PC-59), after the delay time(PC-60), the inverter enters the dormancy state and stops automatically.
If the inverter is in dormancy state and the current operation command is valid, when the set frequency is
greater than or equal to the wake-up frequency(PC-57), the inverter starts to restart after the Wake up delay
time(PC-58).
In general, please set the wake-up frequency to be greater than or equal to the dormancy frequency. Set the
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