User Manual of EM730 Series Inverter ★ When “2: intelligent operation, subject to temperature control” is selected, make sure that the temperature detection module of the inverter works properly. When the input voltage of the inverter is lower than the output voltage, you can increase the overmodulation intensity to improve the bus voltage utilization and thus increase the upper limit of output voltage. When F15.35=1.10, the upper limit of output voltage can be increased by 10%, thus reducing the output current under heavy loads, but the current harmonics will increase. will be enabled.
When the WM modulation mode is valid (F15.36=1), the 7-segment PWM When the PWM modulation mode is invalid (F15.36=0), the 7-segment PWM modulation modulation will be enabled at the output frequency lower than the switching frequency (F15.37) and the 5-segment PWM modulation will be enabled at the output frequency higher than the switching frequency. The 7-segment PWM modulation has a smaller current ripple than 5-segment PWM modulation, but involves larger switching loss, more heat from the inverter, and larger temperature rise. This parameter does not need to change under normal circumstances in the dead zone compensation mode.
Users need to select a different compensation mode only in case of special requirements for the quality of the output voltage waveform or other abnormalities (e.g. motor oscillation). 284 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F15.35 Overmodulation intensity 1.00 ~ 1.10 1.05 ● 0x0F23 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F15.36 Switching options of PWM modulation mode 0: invalid (7-segment PWM modulation) 1:
valid (5-segment PWM modulation) 0 〇 0x0F24 F15.37 Switching frequency of PWM modulation mode 0.00 to maximum frequency F00.16 Hz 15.00 ● 0x0F25 Function code Function code name Parameter description Unit Default setting Attribute Mailing address F15.38 Options of dead zone compensation mode 0: no compensation 1: compensation mode 1 2: compensation mode 2 1 〇 0x0F26