Advantages of high carrier frequency are as follows: ideal
current waveform, few current harmonics and small motor
noise.
Disadvantages of high carrier frequency are as follows:
growing switch consumption, enlarged temperature raise,
impacted output capacity; under high carrier frequency, the
VFD needs to be derated for use, meanwhile, the leakage
current will increase, which increases electromagnetic
interference to the surroundings.
While low carrier frequency is the contrary. Low carrier
frequency will cause unstable operation at low frequency,
decrease the torque, or even lead to oscillation.
The carrier frequency of VFD is set properly by default, and
it should not be changed by users at will.
If the default carrier frequency is exceeded during use,
derating is required, derate by 10% for every additional 1k
carrier frequency.
Setting range: 1.0–15.0kHz
0: No operation
1: Rotary autotuning 1; carry out comprehensive motor
parameter autotuning; rotary autotuning is used in cases
where high control precision is required;
2: Static autotuning 1 (comprehensive autotuning); static
autotuning 1 is used in cases where the motor cannot be
disconnected from load;
3: Static autotuning 2 (partial autotuning) ; when current
motor is motor 1, only P02.06, P02.07 and P02.08 will be
autotuned; when current motor is motor 2, only P12.06,
P12.07 and P12.08 will be autotuned.
4: Rotary autotuning 2, which is similar to rotary
autotuning 1 but is only applicable to asynchronous
motors.
5: Rotary autotuning 3 (partial autotuning), which is only
applicable to asynchronous motors.
0: Invalid
1: Valid during the whole process
Automatic voltage regulation function is used to eliminate
the impact on the output voltage of VFD when bus voltage
fluctuates.
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