TECO L510 - Page 104

4-70
11-Performance Control Parameters
11-00
Prevention of Reverse operation
Range
【0】: Reverse command is enabled
【1】: Reverse command is disabled
 11-00=1: he reverse command is disabled.
11-01
Carrier Frequency
Range
【1~16】KHz
11-02
Carrier mode selection
Range
【0】: Carrier mode0 3-phase PWM modulation
【1】: Carrier mode1 2-phase PWM modulation
【2】: Carrier mode2 2-phase soft PWM modulation
 Mode 0: 3-phase PWM Modulation Three output transistors on at the same time (Full Duty).
 Mode 1: 2-phase PWM Modulation Two output transistors on at the same time (2/3 Duty).
 Mode 2: Soft PWM Modulation: 3-phase PWM and 2-phase PWM modulation used randomly.
Note: Mode 2 can improve life of the IGBTs, control temperature rise and suppress electromagnetic noise.
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
Soft PWM
66.6%
Low
Low
High
High
11-03
Carrier Frequency auto reduction due to temperature rise
Range
【0】:Disable
【1】:Enable
 When inverter (heatsink) temperature rises above 176°F/80°C the Carrier Frequency is automatically
reduced to 4 kHz.
 When the temperature falls below 158°F/70°C, Carrier Frequency is reset back to its original setting.
 Temperature can be displayed by setting parameter 12-00=04000.
158ºF/70ºC
176ºF/80ºC
t1
t2
T0
Temperature
Carrier
Frequency
10KHz
4KHz
t1
t2
T0