Abundant frequency setting sources.
Extreme short-time acceleration can be operated without trip, such as 0.1s from 0Hz to 50Hz.
Diverse input and output terminals.A high performance AC drive is designed for motor applications that require more than basic variable speed control. It provides advanced control of motor speed, torque, acceleration, deceleration, and position to achieve more responsive and precise machine operation.
GK820 is a high performance AC drive designed for demanding industrial applications. It supports V/f control, multiple levels of sensorless vector control, and closed-loop vector control, allowing users to select an appropriate control method according to motor type and application requirements.
With functions including high-precision speed control, torque control, position control, fast response, encoder feedback, process PID, and simple PLC, GK820 provides a flexible platform for advanced industrial motor control.
An AC drive controls an AC motor by regulating the voltage and frequency supplied to the motor. In more demanding applications, the drive also needs to respond accurately to changes in motor speed, torque, load, and position.
GK820 provides multiple motor control modes for different performance requirements. V/f control can be used for applications where straightforward variable speed regulation is sufficient. Sensorless vector control provides more advanced speed and torque control without requiring a conventional speed feedback device.
For applications requiring higher positioning and speed accuracy, closed-loop vector control can use encoder feedback to continuously monitor motor operation and adjust the drive output.
This control architecture allows GK820 to respond to changing load conditions while maintaining stable motor operation and supporting demanding industrial automation tasks.
GK820 supports V/f control, sensorless vector control, and closed-loop vector control, providing flexible motor control for different speed, torque, and precision requirements.
GK820 provides high-precision speed control with speed accuracy up to ±0.02% under closed-loop vector control. It also supports high-precision torque control for applications requiring stable and accurate motor output.
GK820 provides a torque response time below 10 ms under sensorless vector control and below 5 ms under closed-loop vector control, supporting fast response to changing load conditions.
GK820 provides up to 200% starting torque at 0 Hz under closed-loop vector control, helping motors start reliably under demanding load conditions.
With closed-loop vector control, encoder feedback, and position control, GK820 supports applications requiring precise motor speed, torque, and positioning performance.
GK820 supports extreme short-time acceleration, including acceleration from 0 Hz to 50 Hz in 0.1 seconds under applicable conditions. Multiple acceleration and deceleration curves are also available for different machine requirements.
GK820 provides flexible encoder feedback and diverse digital, analog, pulse, and relay I/O, allowing integration with different industrial control systems and machine configurations.
GK820 integrates process PID, simple PLC, dynamic braking, and motor protection functions, supporting more flexible control and reliable operation in demanding industrial applications.
A high performance AC drive allows motor speed to be controlled more accurately than simple fixed-speed operation. This is particularly important for machines where process quality depends on consistent motor speed.
Fast control response allows the drive to react to changing load conditions quickly. This can improve machine responsiveness in applications with frequent acceleration, deceleration, or load variation.
Torque control allows motor output to be adjusted according to the mechanical requirements of the application. This is useful for machines where torque consistency directly affects production performance.
Advanced vector control can provide stronger and more stable motor control at low speeds. This is useful for machinery that needs controlled operation across a wide speed range.
Multiple I/O terminals, encoder interfaces, frequency reference sources, and communication functions allow the drive to be integrated into different industrial control architectures.
With closed-loop vector control, position-related functions, encoder feedback, and programmable control functions, GK820 can support applications that require more advanced motor control than a conventional general-purpose drive.
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 | |
GK820 is designed for industrial applications requiring precise speed control, torque control, fast response, and advanced motor operation.
Conveyor systems can require stable speed control, controlled acceleration, and reliable torque performance, particularly when material loads change during operation.
GK820 can support applications such as:Belt conveyors、Roller conveyors、Material handling equipment、Production lines、Automated transport systems
Hoisting and lifting applications require controlled acceleration, deceleration, and torque management.
GK820’s high starting torque, vector control, braking functions, and speed control capabilities can support compatible lifting equipment where the drive configuration meets the application requirements.
Winding applications often require accurate speed and torque control to maintain stable material handling.
GK820’s torque control, speed regulation, and feedback functions can support compatible winding and unwinding machinery.
Textile production equipment can require stable speed, coordinated motor operation, and flexible frequency control.
GK820 provides wobble frequency control, programmable speed functions, and advanced motor control capabilities for compatible textile machinery.
Machine tools can require precise speed regulation, fast response, and controlled acceleration and deceleration.
GK820’s closed-loop vector control, position control, encoder feedback, and high-precision speed control can support compatible machine tool applications.
Packaging equipment often involves repeated acceleration, deceleration, positioning, and speed changes.
GK820 can support compatible packaging machinery requiring fast motor response, programmable speed control, and position-related functions.
Industrial processing machines can require stable motor speed and torque under changing material loads.
GK820’s high-precision torque control, vector control, and process control functions can support compatible extrusion and processing equipment.
Although GK820 is designed for demanding applications, it can also be used for industrial pump and fan systems where advanced speed control, process PID, or wider control functionality is required.
Speed and torque control are two important requirements in demanding motor applications.
Speed control focuses on maintaining the required motor speed despite changes in load or operating conditions.
Torque control focuses on controlling the motor’s output torque according to the requirements of the machine.
GK820 combines both control capabilities and provides multiple control modes. Depending on the application, users can select V/f control, sensorless vector control, or closed-loop vector control.
This flexibility allows one high performance AC drive platform to support different levels of motor control performance.
GK820 can be integrated into industrial automation systems through its flexible I/O, frequency reference sources, encoder feedback, communication functions, simple PLC, and process PID.
The drive can receive commands from control terminals, analog signals, pulse signals, communication systems, or its control panel.
This allows GK820 to operate as part of a larger automated machine or production line while maintaining direct control of the motor.
For applications requiring more advanced coordination, the available encoder feedback, position control, and programmable functions can support more sophisticated machine architectures.
GK820 is a high performance AC drive designed for demanding motor control applications requiring precise speed control, torque control, fast response, and advanced control functions.
The specified speed accuracy is ±0.5% under V/f control, ±0.2% under sensorless vector control, and ±0.02% under closed-loop vector control.
Yes. GK820 supports high-precision torque control, including torque control under sensorless vector and closed-loop vector control.
Yes. GK820 provides encoder signal inputs compatible with different encoder signal configurations, including incremental, UVW hybrid, and resolver-related feedback.
