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Machine Protection
This section explains functions for protecting the machine.
Reducing Noise and Leakage Current
The switching frequency of the Drive's output transistor can be changed to reduce carrier noise and leakage
current from the motor.
Related Parameters
Name
Parameter
Number
Display
Carrier
Selects the number of pulses per second of
Frequency
the output voltage waveform. Setting range
Selection
determined by C6-01 setting.
0: Low noise
1: Fc = 2.0 kHz
2: Fc = 5.0 kHz
C6-02
3: Fc = 8.0 kHz
CarrierFreq
4: Fc = 10.0 kHz
Sel
5: Fc = 12.5 kHz
6: Fc = 15.0 kHz
OF: Program (Determined by the settings of
C6-03 thru C6-05)
Carrier
Sets the carrier frequency upper limit and
Frequency
lower limit in kHz units.
Upper Limit
The carrier frequency gain is set as follows:
C6-03
CarrierFreq
Max
Carrier
Frequency
Lower Limit
C6-04
CarrierFreq
Min
Carrier
K is a coefficient that depends on the setting
Frequency
of C6-03.
Proportional
C6-03 ≥ 10.0 kHz: K = 3
Gain
10.0 kHz > C6-03 ≥ 5.0 kHz: K = 2
5.0 kHz > C6-03: K = 1
Maximum carrier frequency allowed when
C6-02 = F.
C6-05
Note: Carrier frequency is set to C6-03
(upper limit) when operating in Vector
CarrierFreq
Control Mode.
Gain
C6-05 Sets the relationship of output
frequency to carrier frequency when
C6-02 = OF.
Carrier
Selects the carrier frequency during Vector
Frequency
Control 2 wo/PG.
Selection for
1: 2kHz (3-phase modulation)
Open Loop
C6-11
2: 4kHz (3-phase modulation)
Vector 2
3: 6kHz (3-phase modulation)
Carrier Freq
4: 8kHz (3-phase modulation)
Sel
* 1. The setting range depends on the control method of the Drive.
* 2. The factory setting depends on the capacity of the Drive.
* 3. The setting range depends on the capacity of the Drive.
* 4. This parameter can be monitored or set only when 1 is set for C6-01 and F is set for C6-02.
* 5. Displayed in Quick Programming Mode when motor 2 is set for a multi-function input.
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Description
Carrier frequency
Output frequency x (C6-05) x K
Output
frequency
(Max. output frequency)
Change
Setting
Factory
during
Range
Setting
V/f
with
Operation
PG
6
1 to F
No
Q
*2
2.0
15.0
to
No
A
kHz
15.0
*2
*3 *4
0.4
15.0
to
No
A
kHz
15.0
*2
*3 *4
00
to
00
No
A
99
*4
4
No
No
1 to 4
No
*2
*5
Machine Protection
Control Methods
Open
Open
V/f
Loop
Flux
Loop
Vector
Vector
Vector
1
2
*5
Q
Q
A
No
A
A
A
No
A
No
No
No
A
No
No
No
No
No
Q
*5
*5
*5
6-
39
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Troubleshooting
