GK820 High-performance AC Drive

GK820 is the high-performance series which covers an entire range of applications, particularly for demanding ones that require precise speed control, torque control and fast response, etc.

Product Description

Abundant frequency setting sources.Abundant frequency setting sources.
Extreme short-time acceleration can be operated without trip, such as 0.1s from 0Hz to 50Hz.Extreme short-time acceleration can be operated without trip, such as 0.1s from 0Hz to 50Hz.
Diverse input and output terminals.Diverse input and output terminals.


GK820 Technical Features 


Power input Rated input voltage 200V level: single/three phase 200V~240V
400V level: three phase 380V~440V
Frequency 50Hz/60Hz, tolerance ±5%
Voltage range Continuous voltage fluctuation ±10%, short fluctuation -15%~+10%,
i.e. 200V: 170V~264V; 400V: 323V~484V;
Voltage out-of-balance rate <3%, distortion rate as per the requirements of IEC61800-2
Rated input current See Section 2.3
Power output Applicable motor (kW) See Section 2.3
Rated current (A) See Section 2.3
Output voltage (V) 3-phase: 0~ rated input voltage, error < ±3%
Output frequency (Hz) 0.00~ 600.00Hz; unit: 0.01Hz
Overload capacity 150% – 1min; 180% – 10s; 200% – 0.5s
Control characteristics V/f patterns V/f control
Sensor-less vector control 1
Sensor-less vector control 2
Closed-loop vector control (including position control)
Range of speed regulation 1:100 (V/f control, sensor-less vector control 1)
1:200 (sensor-less vector control 2)
1:1000 (closed-loop vector control)
Speed accuracy ±0.5% (V/f control)
±0.2% (sensor-less vector control 1 & 2)
±0.02% (closed-loop vector control)
Speed fluctuation ±0.3% (sensor-less vector control 1 & 2)
±0.1% (closed-loop vector control)
Torque response < 10ms (sensor-less vector control 1 & 2)
< 5ms (closed-loop vector control)
Torque control accuracy ±7.5% (sensor-less vector control 2)
±5% (closed-loop vector control)
Starting torque 0.5Hz:180% (V/f control, sensor-less vector control 1)
0.25Hz: 180% (sensor-less vector control 2)
0Hz: 200% (closed-loop vector control)
Positioning accuracy ±1 line pulse
Basic functions Start frequency 0.00~ 600.00Hz
Accel/ 0.00~60000s
Decel time
Switching frequency 0.7kHz~16kHz
Frequency setting Digital setting + control panel ∧/∨
Digital setting + terminal UP/DOWN
Analog setting (AI1/AI2/AI3)
Terminal pulse setting
Motor start-up methods Started from start frequency
DC brake then started
Flying start
Motor stop methods Ramp to stop
Coast to stop
Ramp to stop + DC brake
Dynamic braking capacity Brake choppers for GK820-4T75 and below are inbuilt or can be inbuilt. See table 2-1
Brake chopper working voltage:
200V class: 325~375V; 400V class: 650V~750V
Service time: 0.0~100.0s
DC brake capacity DC brake start frequency: 0.00~600.00Hz
DC brake current: 0.0~200.0%
DC brake time: 0.00~30.00s
Input terminals 7 digital inputs, one of which can be used for high-speed pulse input. Compatible with active open collectors NPN, PNP and dry contact input.
3 analog inputs, one of which supports voltage input only, and the other two are voltage/current programmable.
Output terminals One high-speed pulse output terminal, 0~50kHz square signal; can output set frequency, output frequency and so forth
One digital output terminal
Two relay output terminals
Two analog output terminals, voltage/current programmable; can output set frequency, output frequency and so forth
Encoder signal terminal Compatible with 5V/12V encoder
Compatible with different types of encoder signal input, such as open collector, push-pull and differential, etc.
Featured functions Parameter copy, parameter backup, common DC bus, free switchover between two motors’ parameters, flexible parameter displayed & hidden, various master & auxiliary frequency reference and switchover, reliable speed search started, a variety of Accel/Decel curves programmable, automatic correction of analog, mechanical brake control, 16-step speed control programmable (2-step support flexible frequency reference), wobble frequency control, fixed length control, count function, three faults recorded, over excitation brake, over voltage stall protection programmable, under voltage stall protection programmable, restart upon power loss, skip frequency, frequency binding, four kinds of Accel/Decel time, motor thermal protection, flexible fan control, process PID control, simple PLC, multi-functional key programmable, droop control, asynchronous and synchronous motor tune, field-weakening control, high-precision torque control, V/f separated control, torque control at sensor-less vector control, torque control at closed-loop vector control, two encoder signal inputs (support incremental, UVW hybrid and resolver, etc.), flexible deceleration ratio control, zero-speed clamping, angular positioning, simple feed forward control, pulse train position control
Protection functions Refer to Chapter 7 – Troubleshooting
Environment Place of operation Indoors, no direct sunlight, free from dust, corrosive gases, flammable gases, oil mist, water vapor, water drop and salt, etc.
Altitude 0~2000m. De-rate 1% for every 100m when the altitude is above 1000 meters
Ambient temperature -10℃~40℃. The rated output current should be derated 1% for every 1℃ when the ambient temperature is 40℃~50℃
Relative humidity 5%~95%, no condensation
Vibration Less than 5.9m/s2 (0.6g)
Storage temperature -40℃~+70℃
Others Efficiency at rated Amps 7.5kW and below: ≥93%
11~ 45kW: ≥ 95%      55kW and above: ≥98%
Installation 560kW and 630kW are cabinet type,
the others are wall-mounted
IP grade IP20
Cooling method Forced air cooling

Application Scope

Need Help? Send a WhatsApp message now

Click one of our representatives below


Marketing Support


Marketing Support


Marketing Support


Fax:+86 755 86392625
Tel:+86 755 86392623
Tel:+86 755 86392601

Online Service