Open loop control frequency inverter
1. Open loop control frequency inverter.
Open loop control frequency inverter is general frequency inverter with three kinds of control methods—V/F control, open-loop flux vector control, torque control. It has abundant parameter functions including pulse frequency setting, multi-step speed and simple PLC setting, PID setting; non-stop at momentary power failure, auto voltage regulation and so on.
2. Basic Parameters of Open loop control frequency inverter.
3.Main features and application of the Open loop control frequency inverter.
4. Main parameters of Open loop control frequency inverter.
380V+/-15% three phase 50/60Hz
0~ 380V+/-15%, three phase 0-500Hz
Carrier wave frequency
0.5kHz-16kHz, can be auto adjusted according to carrier.
Speed Control Accuracy
Senseless vector control（SVC）
0.5Hz/150%(SVC) ; 0Hz/180%(FVC)
Speed adjusting range
1：200（SVC） 1:1000(FVC) 1:50(V/F)
Speed control accuracy
Torque control accuracy
150% rated current 60s,180% rated current 3s
automatic torque boost，manual torque boost 0.1%~30.0%
Three types：liner; Multi-point type; N times square， V/F curve（1.2 times square， 1.4 times square，1.6 times square，1.8 times square，2 times square
Two types：full separation，half separation
Liner or S curve ACC./DCC. Mode; Four types ACC./DCC. Time; ACC./DCC time range 0.0s-6500.0s.
DC brake frequency：0.00Hz~Max. frequency; Braking time: 0.0s-36.0s; Braking current：0.0%-100.0%
JOG frequency range：0.00Hz-50.00Hz; JOG ACC./DCC time 0.0s-6500.0s
Simple PLC，multi step speed control
16 steps speed can be set by in built PLC or terminals.
In built PID
can realize close loop process control system
Automatic voltage regulation
can output constant voltage even grid voltage fluctuates.
Over voltage and over current control
automatic limitation to running voltage and current to avoid frequent tripping
Fast limitation of current
To minimize over current faulty to make running smoothly.
Excavator characteristics，torque limitation to avoid frequent tripping. Torque control can be realized in Vector control mode.
safety detection to Peripherals
Safety detection to Peripherals when power on(such as grounding, shortcut etc.)
COMMON DC BUS
Multi frequency inverters share DC common BUS.
five options： main menu， advanced menu，monitoring menu，checking menu， user define menu
Programmable key：commend channel switch/ Forward and Reverse running/JOG running
Textile swing control
Triangular wave frequency control function
setting range 0H-65535H
Running command giving
three channels：keypad giving，terminals giving，RS485 giving. All of which can be switched to each other.
Frequency source giving
digital giving， analog voltage giving， analog current giving， impulse giving， RS485 giving. All of which can be switched to each other.
Five digital inputs，one of which can be used as high speed impulse input, the Max. Frequency can reach 100kHz. This can be extended to ten inputs and compatible.
One high speed impulse output terminal (can be set into open circuit collector), 0kHz~100kHz square wave output, can output setting frequency or outputting frequency.
5 virtual DI,5 virtual DO
to display parameters
Parameter copying by LCD panel
Key lock and Key function selection
Key lock and Key function selection
motor shortcut detection，input output phase lost protection, over current protection, over voltage protection, low voltage protection, over heat protection, over load protection.
multi function input and output extension cards，braking parts，telecommunication card，PG card，user programmable.
indoor avoid sunlight, avoid dust、erosion gas、flammable gas, oil mist、steam vapor、water drop、salt etc.
-10℃ ~ +40℃. Deration above 40℃
under 95%RH, no water condensation
-20℃ ~ +60℃
5. Details of open loop control frequency inverter:
6.Corner of Factory
In order to make good use of open loop control frequency inverter and insure the user's safety, please read through the manual before installing or operating the FST-650 inverter.
9. All Open loop control frequency inverter have to go through 4 step checks from raw material to delivery.
10. Open loop control frequency inverter in spinning frame application:
During the doffing of large, medium and small yarns, there is a clear difference in the change in tension. For the requirements of spinning frame equipment control, in the near future, the application of the spinning control system for vector control inverters can help the spinning frame to complete better roughing processes.
11.Open loop control frequency inverter Wirings diagram