4-209
11- 29
Auto De-rating Selection
Range
【0】:
Disable
【1】:
Enable
The automatic de-rating function automatically reduces the output frequency by 30% of the nominal motor
speed when the inverter detects an overheat condition (heatsink).
Automatic de-rating function depends on the automatic carried frequency reduction selection (11-03).
If automatic carrier frequency reduction is disabled (11-03=0), the output frequency is reduced by 30% of
the nominal motor speed when an overheat condition is detected.
If automatic carrier frequency reduction is enabled (11-03=1), the output frequency is reduced by 30% of
the nominal motor speed when the carrier frequency is at its minimum setting.
11-29=0: Auto de-rating selection disabled, carrier frequency is based on 11-01 or 11-03.
11-29=1: Auto de-rating selection is enabled.
11- 30
Variable Carrier Frequency Max. Limit
Range
【
2~16】KHz
11- 31
Variable Carrier Frequency Min. Limit
Range
【
1~16】KHz
11- 32
Variable Carrier Frequency Proportional Gain
Range
【
00~99】
Carrier frequency method depends on the selected control mode.
Control Mode
Variable Carrier Frequency
(11-01 = 0)
Fixed Carrier Frequency
(11-01 = 2-16 kHz)
V/F Available Available
SLV Not available Available
Variable carrier frequency can be adjust with parameter 11-30 ~ 11-32.
Carrier
Frequency
(KHZ)
11-30
11-31
Fmax
(01-02)
OutputFrequency
(Fout, Hz)
Fout x (11-32) x K
K is a coefficient; the value of K is based on the following based on the maximum carrier frequency:
K=1: when 11-30 < 5 KHz
K=2: when 10 KHz > 11-30 ≥ 5 KHz
K=3: when 11-30 ≥ 10KHz
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