INVT GD20-0R7G-2 Three-Phase Inverter for Small Motors

The INVT GD20-0R7G-2 stands as a robust three-phase inverter, meticulously engineered for the precise control of small three-phase motors. Its core strengths lie in delivering exceptional performance, energy efficiency, and user-friendly operation, making it a compelling choice for a myriad of industrial applications. This inverter boasts a compact design, facilitating easy integration into various control panels and machinery. Key technical parameters include an input voltage range of 380-460V AC, a rated output power of 0.75kW (1HP), and an output frequency range of 0-400Hz. The GD20 series is recognized for its advanced control algorithms, offering precise speed regulation and torque control, essential for applications demanding high accuracy.

Product Specifications

| Feature               | Specification                     |

| :-------------------- | :-------------------------------- |

| Model                 | GD20-0R7G-2                       |

| Phase                 | Three-Phase Input/Output          |

| Rated Input Voltage   | 380-460V AC                       |

| Rated Output Power    | 0.75kW (1 HP)                     |

| Output Frequency Range| 0-400Hz                           |

| Control Method        | V/f Control, Vector Control       |

| Protection Features   | Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault, Overtemperature |

| Mounting Type         | Wall/Din Rail Mounting            |

| Dimensions (H x W x D)| 180 x 114 x 145 mm                |

| Weight                | Approximately 2.0 kg              |

Core Features & Market Positioning

The INVT GD20-0R7G-2 distinguishes itself through its dual control modes: V/f control for general-purpose applications and advanced vector control for enhanced performance in demanding scenarios. This flexibility allows it to cater to a broad spectrum of motor control needs. Its market positioning is firmly established as a high-value, reliable solution for small motor applications where precision, energy savings, and ease of use are paramount. The inverter's integrated braking unit (for select models, though the GD20-0R7G-2 typically utilizes external braking resistors for higher braking torque needs) and robust protection features ensure operational continuity and safety, minimizing downtime and maintenance costs. The GD20 series is lauded for its competitive price-performance ratio, making sophisticated motor control accessible for smaller enterprises and specialized equipment.

Key Application Scenarios

This three-phase inverter is ideally suited for a diverse range of industrial applications where precise motor control is critical. Common scenarios include powering conveyor systems in manufacturing and logistics, driving pumps and fans in HVAC and water treatment facilities, and controlling machine tools and textile machinery. Its ability to provide smooth acceleration and deceleration, coupled with precise speed holding, makes it invaluable for applications requiring consistent output and reduced mechanical stress. The INVT GD20-0R7G-2 is also frequently deployed in packaging machinery, food processing equipment, and automated production lines where accurate and repeatable motor performance is essential. The versatility of its control methods ensures optimal performance across varying load conditions.

Practical System Integration Guidance

Integrating the INVT GD20-0R7G-2 into existing systems is straightforward due to its user-friendly design and comprehensive documentation. The unit supports standard wiring practices for three-phase AC motors and power input. Proper grounding is crucial for safety and signal integrity, requiring a dedicated ground connection to the chassis and motor frame. Parameter configuration can be accessed via the intuitive onboard keypad and LED display or through optional communication modules for remote setup and monitoring. Basic parameter adjustments for motor tuning, such as setting motor poles, rated current, and rated frequency, are typically performed during commissioning to optimize performance. Advanced users can leverage the built-in PID controller for closed-loop process control applications.

Operation and Risk Mitigation

Safe and efficient operation of the INVT GD20-0R7G-2 hinges on adhering to installation guidelines and understanding its fault indications. The inverter incorporates extensive protection mechanisms, including overload, overvoltage, undervoltage, short circuit, ground fault, and overtemperature protection, to safeguard both the drive and the motor. Common troubleshooting often involves checking power supply stability, verifying motor connections, and ensuring proper parameter settings. In the event of a fault, the LED display will show a specific error code, such as E.01 for overcurrent or E.03 for overvoltage, allowing for rapid diagnosis and resolution. Always ensure power is disconnected before performing any wiring or maintenance to mitigate electrical hazards.

Scalability & Long-Term Value

While the GD20-0R7G-2 is designed for small motor applications, its integration within the broader INVT product ecosystem offers potential for scalability. The GD20 series shares common communication protocols with other INVT drive families, facilitating standardized control strategies across different machine sizes. This compatibility ensures that as application requirements evolve, the knowledge and infrastructure developed around the GD20 can be leveraged. Furthermore, INVT's commitment to developing intelligent drive solutions means that units like the GD20-0R7G-2 can be integrated into IIoT platforms for advanced data analytics, predictive maintenance, and remote diagnostics, enhancing long-term operational value and system efficiency.

Frequently Asked Questions

Q1: What is the maximum motor size this inverter can control?

The INVT GD20-0R7G-2 is specifically designed for small three-phase motors, rated at 0.75kW or 1 horsepower. It is optimized for applications where precise speed and torque control are needed for motors within this power range. Exceeding the rated capacity can lead to overload faults and potential damage to the inverter or motor. It is crucial to match the inverter's specifications to the motor's nameplate data for optimal performance and longevity.

Q2: Can this inverter be used with single-phase motors?

No, the INVT GD20-0R7G-2 is exclusively a three-phase inverter and requires a three-phase power supply for operation. It is designed to control three-phase induction motors. Attempting to connect a single-phase motor or supply it with single-phase power will result in damage and will not function correctly. For single-phase motor control, a different type of inverter or a phase converter would be necessary.

Q3: What are the typical applications for the INVT GD20-0R7G-2?

This inverter is commonly used in industrial automation for controlling pumps, fans, conveyors, and small machine tools. It excels in applications requiring variable speed, smooth starting and stopping, and precise positioning. Sectors such as HVAC, water treatment, food processing, and packaging machinery frequently utilize this model for its reliability and performance. Its compact size also makes it suitable for integration into space-constrained control cabinets.

Q4: How do I perform basic motor parameter setup?

Basic setup involves entering the motor's nameplate data into the inverter's parameters. Key settings include motor rated voltage, rated current, rated frequency, rated speed, and number of poles. Refer to the INVT GD20 user manual for the specific parameter numbers. Auto-tuning functions are often available to automatically optimize these parameters for the connected motor, ensuring efficient operation.

Q5: What is the warranty period for the INVT GD20-0R7G-2?

INVT typically offers a standard warranty period for their products, which often ranges from 12 to 18 months from the date of purchase or installation. Specific warranty terms may vary based on region and distributor. It is advisable to consult the product documentation or the authorized INVT distributor for precise warranty details and any applicable extended warranty options.

Q6: Can this inverter be controlled remotely?

Yes, the INVT GD20-0R7G-2 can be controlled remotely through optional communication modules. It supports common industrial communication protocols like Modbus RTU, allowing integration into SCADA systems or PLCs. This enables remote start/stop commands, speed adjustments, and parameter monitoring, enhancing automation capabilities and operational flexibility in complex systems.

Q7: What are the environmental operating conditions for this inverter?

The inverter is designed for industrial environments and typically operates within a temperature range of -10°C to +40°C (or up to 50°C with derating). It should be installed in a clean, dry location with adequate ventilation, protected from direct sunlight, dust, and corrosive atmospheres. Humidity levels should generally be kept below 90% non-condensing. Proper installation environment is key to its longevity.

Q8: How do I connect an external braking resistor?

For applications requiring higher braking torque than the internal braking capacity, an external braking resistor can be connected. Ensure the resistor's resistance value and power rating are compatible with the inverter's specifications to prevent damage. The connections are typically made to dedicated terminals on the inverter. Refer to the user manual for precise wiring diagrams and parameter settings related to braking.

Q9: What is the difference between V/f control and vector control?

V/f control is a simpler method that maintains a constant ratio between voltage and frequency, suitable for general applications like fans and pumps. Vector control offers superior performance by independently controlling voltage and current to manage torque and speed more precisely, providing dynamic response and stable operation under varying loads. The GD20 supports both for versatile application coverage.

Q10: How can I troubleshoot an overload fault (E.01)?

An overload fault (E.01) typically indicates that the motor is drawing more current than the inverter is rated for. Check for mechanical issues causing excessive load on the motor, verify motor connections for short circuits, and ensure motor parameters are correctly set in the inverter. If the motor is properly sized and the load is normal, the inverter itself or the motor may require inspection.