Chapter 6 Function Introduction
Shenzhen Hpmont Technology Co., Ltd.
- 92 -
HD3N Series User Manual V1.1
Stall overvoltage function (F19.18 - F19.19)
During running process of HD3N, it will encounter DC busbar voltage increase and overvoltage
protection due to load inertia. DC busbar voltage may increase because of sudden increase/decrease
of load during dec process.
Ref. code
Function Description
Setting Range [Default]
F19.18
Overvoltage suppression gain
0.000 - 1.000 [0.500]
0: Forbid stall overvoltage.
0.001 - 1.000: Enable stall overvoltage.
•
When HD3N is running, it detects busbar voltage and compares it with F19.19, if busbar voltage >
F19.19, HD3N will increase output frequency to avoid large load feedback.
•
If F19.18 is too small, it can not effectively supress increase of busbar voltage;
•
If F19.18 is too large, output frequency will fluctuate even system oscillates; to avoide this problem,
increase duration of dec process.
Note: If stall overvoltage ;asts for more than 1 minute, HD3N reports stall overvoltage fault (E0007), and stops
output.
F19.19
Stall overvoltage point
650 - 790 [690V]
If overvoltage occurs suring running, properly increase stall overvoltage gain and decrease F19.19.
Stall overvoltage and braking unit:
•
Usually when appling braking units to inverter,
please forbid stall overvoltage (F19.18 = 0);
•
But if feedback energy is too large at loading
moment and delayed energy release of braking
unit, HD3N will adopt overvoltage protection. To
avoid protection, enable stall overvoltage and
F19.19) should > action voltage of braking unit.
△
F = F19.18
×
(V
DC
-F19.19)
Auto current limit (F19.20 - F19.21)
Auto current limit is used to limit the load current in real time < F19.21. Therefore HD3N will not trip
due to surge current. It is especially suitable for applications with big load inertia or big change of
load.
In auto current limit process, output frequency of HD3N may change; therefore, it is recommended
not to enable when stable output frequency is required.
Note: when HD3N is used at geopotential load (lift and hoister),to ensure safety of whole system, forbit these functions:
F19.12 - F19.15, F19.16 - F19.17, F19.18 - F19.19 and19.20 - F19.21.
Ref. code
Function Description
Setting Range [Default]
F19.20
Auto current limit gain
0.000 - 1.000 [0.500]
Output frequency of HD3N>F19.21, HD3N will limit current to avoid over-current protection.
•
Adjust F19.20 according to actual load:
•
If F19.20 is too small, it can not fully limit increase of output current;
•
If F19.20 is too large, output frequency will fluctuate even system oscillates.
•
Auto current limt is invalid when F19.20 = 0.
F19.21
Auto current limit threshold
20.0 - 200.0 [150.0%]
Defines the current threshold of auto current limit. The current = F19.21 × rated current of HD3N.
•
When auto current limit is valid, if F19.21 is too small, it may affect the load capacity of HD3N.
Busbar voltage
F19.19
Setting frequency
Reference
frequency
Time
Time
Voltage
Frequency
