User Manual of A90 Series Inverter
239
Time t
Bus voltage
0
Energy consumption
braking voltage
F15.30
Time t
Energy
consumption
braking
0
Braking
No braking
No braking
Fig. 7-38 Schematic Diagram of Energy Consumption Braking
In the case of valid energy consumption braking (F15.30=1), as shown in Fig. 7-38,
when the bus voltage is greater than the energy consumption braking voltage (F15.31),
energy consumption braking will be started; and when the bus voltage decreases to less
than the aforesaid value, energy consumption braking will be disabled.
The IGBT in the braking unit is engaged during energy consumption braking. Energy
can be quickly released by the braking resistor. The braking utilization rate (F15.32) is the
duty cycle of IGBT running. The greater the duty cycle, the larger the degree of braking is.
Function
code
Function code name
Parameter description
Unit
Default
setting
Attribute
F15.33
Operating mode with set
frequency less than lower
frequency limit
0: running at the lower
frequency limit
1: Shutdown
0
○
When the set frequency of the inverter is lower than the lower frequency limit
(F00.19), the running status depends on the function code F15.33.
Function
code
Function
code name
Parameter description
Unit
Default setting Attribute
F15.34 Fan control
0: running after power-on
1: running at startup
2: intelligent operation,
subject to temperature control
1
○
In order to use the fan reasonably, the fan system has three running modes, depending
