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.
GTAKE provides a range of high-quality vector drives for many industrial applications. Our vector drives characterize advanced control algorithms and high-performance components for improving the efficiency and precision of the applications. Contact us to learn more about our vector drives and how we can help meet your specific requirements.
Thanks to sophisticated engineers, scientific producing workmanship, rigorous quality control systems and management team, GTAKE frequency inverters are equipped with advanced features, some of which are listed as below:
01 Starting torque: 180% at 0.25Hz (sensor-less vector control 2), 200% at 0Hz (closed-loop vector control);
02 Speed adjustable range: 0-50Hz: 1:200 (sensor-less vector control 2), 1:1000 (closed-loop vector control);
vector control 1)
03 Speed accuracy: +/-0.2% (sensor-less vector control 1&2), +/-0.02% (closed-loop vector control);
04 Speed fluctuation: +/-0.3% (sensor-less vector control 1&2), +/-0.1% (closed-loop vector control)
05 Torque response: less than 10ms (sensor-less vector control 1&2), less than 5ms (closed-loop vector control);
06 Over load capability: 150% 1minute, 180% 10 seconds, 200% 0.5 second, once every 10 minutes;
07 Output frequency: 0.00-600.00Hz, or customized like 1MHz;
08 Abundant frequency setting sources;
09 DC brake start frequency: any frequency in the range of 0Hz to 600.00Hz;
10 Diverse input and output terminals;
11 Ambient temperature: -10°C~50°C;
12 High precise torque limit, process PID control, simple PLC, wobble frequency control, mechanical brake control, field weakening control, all-side protection, etc.
13 Online and offline auto-tuning both available;
14 Extreme short-time acceleration can be operated without trip, such as 0.1s from 0Hz to 50Hz.
Application range
The GK820 High-performance AC Drive has a wide range of applications, including:
01 Machine tools: lathes, milling machines, grinding machines, etc.
02 Printing and packaging machinery: printing presses, laminators, paper-cutting machines, etc.
03 Textile machinery: spinning machines, weaving machines, etc.
04 Food machinery: mixers, conveyor belts, etc.
05 HVAC systems: air compressors, pumps, fans, etc.
As a vector-controlled frequency inverter, the GK820 is ideal for applications requiring precise speed control and strong torque output. As a trusted frequency inverter supplier, GTAKE offers reliable and efficient products to meet your needs.
| Mains Supply (R/L1,S/L2,T/L3) | |
| Supply voltage | 208-240V ±10% 380-480V ±10% |
| Power source frequency | 50 / 60 Hz ±5% |
| Displacement power factor (cos φ) | (> 0.98) |
| Output Data (U, V, W) | |
| Output voltage / frequency | 0-100% of supply voltage / 0.00-600.00 Hz or customized |
| Ramp time | 0.01-60000 S |
| Digital Input | |
| Programmable digital inputs | 7 (local), 9(extensible) |
| Logic | NPN or PNP |
| Voltage level | 10 – 30V |
| Pulse input | 1 (X7/DI) |
| Analog Input | |
| Analog inputs | 3 (local), 4 (extensible) |
| Modes | Voltage or current |
| Level | 0 to +10V, -10V to +10V, 0/4 to 20 mA (scalable) |
| Automatic correction | YES |
| Digital Output | |
| Programmable digital outputs | 2 |
| Voltage level at digital output | 0 – 24 V |
| Programmable pulse outputs | 1 |
| Pulse output max. output frequency | 50.0 kHz |
| Analog Output | |
| Programmable analog outputs | 2 (local), 4 (extensible) |
| Voltage range / current range | 0 – 10 V / 0 – 20 mA |
| Relay Output | |
| Programmable relay outputs | 2 (local), 4 (extensible) |
| RA – RB / TA – TB | Normally close |
| RA – RC / TA – TC | Normally open |
| Contact capacitance | 250 V AC / 3A, 30 V DC / 3 A |
| Terminal 485 Interface | |
| 485+ / 485- | Rate: 4800/9600/19200/38400/57600/115200 bps Max. distance: 500 m |
| GND | Isolated from COM |
| Fieldbus Communication | |
| Modbus RTU, Modbus ASCII | Built-in |
| Profibus DP, CAN, CANopen, etc. | Optional |
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 | ||
| Communication | ||
| 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 | |
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