4-56
11 Performance control functions
11- 00
Prevention of Reverse operation
Range
【
0
】
:Reverse command is enabled
【
1
】
:Reverse command is disabled
¾
11-00=1, the reverse command is
disabled
.
11- 01
Carrier Frequency
Range
【
1~16
】
KHz
11- 02
Carrier mode selection
Range
【
0
】
:Carrier mode0 3-phase PW M modulation
【
1
】
:Carrier mode1 2-phase PW M modulation
【
2
】
:Carrier mode2 2-phase randomized PW M modulation
¾
Mode 0: 3-phase PWM Modulation Three Output transistors on at the same time (Full Duty).
¾
Mode 1: 2-phase PWM Modulation Two output transistors on at the same time (2/3 Duty).
¾
Mode 2: Random PWM Modulation This modulation method will use 3-phase PWM and 2-phase
PWM modulation in a random mode.
Modes
Name
IGBT Duty
Heat
Losses
Torque
Performance
Waveform
Distortion
Motor
Noise
0 3-Phase
PWM 100%
High
High
Low
Low
1 2-Phase
PWM 66.6%
Low
Low
High
High
2
Randomized PWM Between mode0
& mode1
Mid Mid Mid Mid
(Leverage)
11- 03
Carrier Frequency auto reduction by temperature
decreasing
Range
【
0
】
:Disable
【
1
】
:Enable
¾
When inverter (heatsink) temperature rises above 80°C the Carrier Frequency is reduced by 4K.
¾
When the temperature falls below less than 70°C, Carrier Frequency is reset to default.
¾
Temperature can be displayed by setting parameter
12-00=04000.
70
℃
80
℃
t1
t2
T
0
Temperature
Carrier
Frequency
10K
4K
t1
t2
T
0