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11 Performance Control Parameters
11-00
Prevention of Reverse operation
Range
【
0
】
:Reverse command is enabled
【
1
】
:Reverse command is disabled
If Prevention of Reverse operation parameter 11-01 is set to 1, the motor only operate in forward direction. A run
command for reverse direction will run in forward direction. Forward or reverse commands can be issued via the
control terminals, keypad or communication.
Note:
This parameter can be used in fan and pump application where reverse rotation is prohibited.
11-01
Carrier Frequency
Range
【
1~16
】
kHz
Sets the inverter carrier frequency in kHz (IGBT switching frequency).
Notes:
(1) Value 1 to 16 represents kHz.
(2) Refer to section 3 inverter derating based on carrier frequency.
(3) A low carrier frequency increases motor noise but reduces motor losses and temperature.
(4) A low carrier frequency decreases RFI, EMI interference and motor leakage current.
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
Sets the carrier frequency mode:
11-02 = 0:
3-phase PWM Modulation Three Output IGBTs are conducting at the same time (Full Duty).
11-02 = 1:
2-phase PWM Modulation Two output IGBTs are conducting at the same time (2/3 Duty).
11-02 = 2:
Random PWM Modulation This modulation method will randomly use 3-phase PWM and 2-phase
PWM modulation.
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 mode 0 & mode1
Medium
Medium
Medium
Medium
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