Product Name:AT20 series General Purpose Inverters
Category:Frequency Inverter
Excellent Control Performance
Optimized Structural Design; Various Installation Methods; Easy to Use and Maintain
Various in Product Configuration and Interface , Powerful in Function
Integrate Various Product Features to Meet Diverse Application Needs

Input voltage,V
Power range, кW
0.4 - 3.7
0.75- 250


Excellent Control Performance

Below 2.2KW (including) can support either V/F control or vector control; Above 3.7KW (including) is vector control and can add PG card when customer tell they need. 

Optimized Structural Design

Size is reduced, saving the installation space for users;
Below 2.2KW (including) support side-by-side rail mounting.
Various in Product Configuration and Interface, Powerful in Function

With standard built-in 485 communication interface and various input terminals and various output terminals;
Above 7.5KW (including) has external keyboard interface to better suit the applications;
30KW (including) ~ 160KW (including) inverter can optionally (just have when customer tell they need) be equipped with built-in DC reactor to improve its power factor; Below 37KW (including) with standard built-in brake unit; 45KW(including)~110KW(including), optional (just have when customer tell they need) built-in brake unit.
Various Installation Methods
Below 5.5KW (including) support rail mounting and wall mounting;
7.5KW (including) -160KW (including) support wall-mounting;
Above 185KW (including) support floor mounting and wall mounting.
Easy to Use and Maintain

The fan can be disassembled and assembled independently for easy maintenance;
Optional normal LED external keyboard and LCD keyboard (above 7.5KW (including)) to meet different application needs.

Integrate Various Product Features to Meet Diverse Application Needs

Simple PLC, multi-speed control, built-in PID, torque control, multi-point V/F curve,inverter not stop work when face instant power failure, etc.

Item AT20
Basic function Control Mode V/F control
Sensorless flux vector control (SVC)Above 3.7K
Close-loop vector control (FVC)Above 3.7KW
Maximum frequency 0600Hz
Carrier frequency 0.5kHz8kHz
The carrier frequency is automatically adjusted based on the load features.
Input frequency resolution Digital setting0.01Hz
Analog setting: Maximum frequency x 0.025%
Start torque G Type0.5Hz/150%SVC);
P Type0.5Hz/100%
Speed range 1:100 (SVC)
Speed stability accuracy ±0.5% (SVC)
Overload capacity G Type:60s for 150% of the rated current,
 3s for 180% of the rated current.
P Type60s for 120% of the rated current,
 3s for 150% of the rated current.
Torque boost Auto-boost;
Customized boost: 0.1%~30.0%
V/F Curve Straight-line  V/F  curve
Multi-point V/F  curve
N-power V/F curve (1.2-power, 1.4-power, 1.6-power,
1.8-power, square)
V/F separation 2 types: complete separation; half separation
Ramp Mode Straight-line ramp.
Four groups of acceleration/deceleration time with the range of 0.00`6500.0s
DC braking DC braking frequency0.00Hz~Maximum frequency 
Braking time
Braking action current value
JOG control JOG frequency range:0.00Hz~50.00Hz
JOG acceleration/deceleration time:  0.0s~6500.0s
Simple PLCMultiple preset speeds It implements up to 16 speeds via the simple PLC function or combination of terminal states
Onboard PID It realizes process-controlled closed loop control system easily
Auto voltage regulationAVR It can keep constant output voltage automatically when the mains voltage changes
Overvoltage/overcurrent stall control The current and voltage are limited automatically during the running process so as to avoid frequent tripping due to over voltage/over current
Rapid current limit It helps to avoid frequent over current faults of the AC drive.
Torque limit and control It can limit the torque automatically and prevent frequent over current tripping during the running process. Torque control can be implemented in the FVC mode.
Individualized functions High performance Control of asynchronous motor are implemented through the high-performance current vector control technology
Rapid dip ride through The load feedback energy compensates the voltage reduction so that the AC drive can continue to run for a short time
Rapid current limit It helps to avoid frequent over current faults of the AC drive.
Timing control Timing range: 0.0Min6500.0Min
Communication methods R S - 4 8 5
Running Command source Operation panel/Control terminals/Serial communication port
You can perform switchover between these sources in various ways.
Frequency source There are ten frequency sources.
Digital setting, analog voltage setting, analog current setting, pulse setting, serial port setting.
You can perform switchover in various ways.
Auxiliary frequency source There are ten auxiliary frequency sources. It can implement fine tuning of auxiliary frequency and frequency synthesis.
Input terminal Standard4 digital input terminalsBelow 5.5KW/6 digital input terminalsAbove 7.5KW)
1 analog input terminal
Below 5.5KW/2 analog input terminalsAbove 7.5KW;
1 voltage input (only support for 0~10V, above 7.5KW)
1 voltage input(0~10V) or current input (420mA)
Output terminal 1 High-speed pulse output terminal (Open-collector)Above 3.7KW
1 replay output terminal Below 5.5KW/2 replay output terminalsAbove 7.5KW
1 analog output terminal3.7KW~5.5KW/2 analog output terminalAbove 7.5KW), Support for 4~20mA current output or 0~10V voltage output
Display and operation panel LED display It displays the parameters
Key locking and function selection It can lock the keys partially or completely and define the function range of some keys so as to prevent mal-function.
Protection mode Motor short-circuit detection at power-on, input/output phase loss protection, over current protection, over voltage protection, under voltage protection, overheat protection and overload protection
Environment Installation location Indoor, free from direct sunlight, dust, corrosive gas, combustible gas, oil smoke, vapor, drip or salt.
Altitude Lower than 1000m
Ambient temperature 10~40 de-rated if the ambient temperature is between 40~50
Humidity Less than 95%RHwithout condensing
Vibration Less than 5.9m/s20.6g
Storage temperature 20~60
Vector control platform products, Powerful and excellent performance, Can be widely used in small and medium power applications, such as food machinery, plastic machinery, ceramic equipment, petroleum machinery, cable equipment, air compressors, CNC, woodworking machinery, textile machinery, printing and packaging equipment, chemical equipment, environmental protection equipment, Conveying equipment, etc.
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