Product Overview and Strategic Positioning
The INVT Goodrive20(model GD20-0R7G-S2)is a compact frequency inverter that epitomizes the integration of advanced drive technology into a space-efficient design.This specific model,with a rated power of 0.75 kW and a single-phase 220V input,serves as a core component in the INVT GD20 series,which is engineered to deliver robust performance for a wide spectrum of industrial applications.As a general vector inverter,it utilizes sensorless vector control to provide superior motor driving performance,making it a versatile solution for applications requiring precise speed and torque control without the need for a feedback encoder.
INVT has positioned the GD20 series as a competitive offering in the global market for compact automation drives,balancing high functionality with cost-effectiveness.The series is designed to meet the growing demand for drives that are both powerful and easy to integrate into existing control systems,supporting everything from simple conveyor belts to complex machining equipment.
Technical Specifications and Functional Architecture
The GD20-0R7G-S2 is defined by a set of precise technical parameters and a rich suite of built-in features.Its operational core is based on a sophisticated inverter architecture that converts incoming AC power to a controlled output for standard asynchronous motors.
Power Architecture:The inverter accepts a single-phase AC input from 220V to 240V and delivers a three-phase output suitable for a 0.75 kW motor.This makes it ideal for single-phase powered facilities.Its output frequency range is a wide 0 Hz to 400 Hz,accommodating everything from precise low-speed creep to high-speed operations.
Control Paradigm:Employing a sensorless vector control strategy,the drive can achieve high torque performance at low speeds(150%torque starting from 0.5 Hz)without requiring a pulse generator(PG).This control method effectively decouples torque and flux,allowing for independent control akin to DC motors,resulting in excellent dynamic response and speed stability under varying load conditions.
Protection and Durability:The unit is fortified with a comprehensive set of protective functions,including over-current,over-voltage,under-voltage,phase-loss,and overtemperature protection.Its independent air duct cooling design prevents dust and particle accumulation on internal components,significantly enhancing long-term reliability in demanding industrial environments.The chassis is rated at IP20,indicating protection against contact with live parts but not against water,necessitating installation in a suitable control panel.
Performance Characteristics and System Advantages
The engineering behind the GD20-0R7G-S2 translates into several key performance advantages that directly benefit the end-user's operational efficiency and machine functionality.
Enhanced Process Control and Energy Efficiency:The inverter's precise control over motor speed allows for perfect matching of drive output to the actual load requirement.This eliminates the energy waste associated with constant-speed motors throttled by mechanical means.In applications like pumps and fans,this can lead to substantial energy savings,sometimes exceeding 50%compared to direct-on-line operation.Furthermore,its built-in PID controller enables direct closed-loop control of physical parameters like pressure,flow,or temperature,improving overall process quality and consistency.
Superior Motor Management and Smooth Operation:The drive offers multiple acceleration and deceleration ramps(linear and S-curve),which can be configured to eliminate mechanical shocks during start and stop cycles.This smooth operation reduces stress on gears,belts,and bearings,thereby extending the service life of the entire mechanical system.Features like a DC injection brake provide controlled stopping without the need for an external mechanical brake in many cases.
Operational Flexibility and Built-in Functionality:The GD20-0R7G-S2 comes with a wealth of pre-programmed functions that increase its versatility.These include multi-step speed settings,a programmable simple PLC for creating automated sequences,and a"fly-start"function that allows the inverter to seamlessly catch a spinning motor before applying control.This makes it suitable for applications where power failure recovery is critical.
Application Spectrum and Implementation Scenarios
The combination of compact size,vector performance,and rich features makes this general vector inverter suitable for a diverse range of industries and machines.
Material Handling and Logistics:It is ideally suited for controlling conveyor belts,sorting systems,and elevators,where smooth starting and stopping are essential for cargo stability and system longevity.
Packaging and Plastic Machinery:In packaging machines,the inverter can precisely control the film feed and sealing processes,while in small injection molding machines or extruders,it can manage the hydraulic pump motor with high torque demand.
General Industrial Automation:The drive finds extensive use in food processing machinery,textile equipment,woodworking tools,and printing presses.Its compact frequency inverter design is particularly advantageous in these sectors where control panel space is often limited,and ease of maintenance is a priority.
Expanded Perspective:The Role of Compact Vector Inverters in Modern Automation
Understanding the broader context of drive technology and system design principles is crucial for maximizing the value of a component like the GD20-0R7G-S2.
1.The Drive Technology Spectrum:V/f vs.Vector Control
The GD20-0R7G-S2 falls into the category of a general vector inverter,a step above basic V/f(Voltage-to-Frequency)drives.While a V/f drive simply maintains a constant ratio between output voltage and frequency,vector control technology decomposes the motor current into two separate components:one for generating torque and another for producing magnetic flux.This independent control allows for significantly better performance.
V/f Control:Suitable for simple,variable-torque applications like fans and pumps where precise speed control is not critical.It is a cost-effective solution but struggles with low-speed torque and dynamic response to load changes.
Vector Control(Sensorless):This method,used by the GD20,provides high starting torque and excellent speed regulation,making it fit for constant-torque applications like conveyors,mixers,and hoists.It offers performance close to that of a closed-loop vector system but without the cost and complexity of an encoder.
Closed-Loop Vector Control:The highest performance tier,used in applications requiring extremely precise speed and position control,such as CNC machinery.It requires an encoder feedback from the motor.
Selection Insight:The sensorless vector control of the GD20-0R7G-S2 offers an optimal balance,delivering high performance for the vast majority of industrial applications without the added cost and wiring complexity of a feedback sensor.
2.Critical System Integration and Sourcing Considerations
Successfully deploying this inverter requires attention to auxiliary components and proper configuration.
Braking Resistor Selection:For applications involving high-inertia loads or rapid deceleration cycles,an external braking resistor is mandatory.This resistor dissipates the regenerative energy generated by the motor during braking,preventing the inverter's DC bus from overvoltage faults.The resistor's resistance and power rating must be carefully selected based on the braking torque required and the duty cycle of the braking event.
Communication and Control Networks:The built-in RS-485 communication port supports the MODBUS-RTU protocol,allowing for seamless integration into factory automation networks for centralized monitoring and control.This digital connectivity is a cornerstone of modern Industrial Internet of Things(IIoT)strategies.
Sourcing and Technical Support:While the GD20 series is widely available,it is crucial to procure units from authorized distributors or reliable sources to ensure product authenticity,access to firmware updates,and receive qualified technical support.
Frequently Asked Questions(FAQs)
1.What is the primary advantage of the sensorless vector control in this inverter?
The key advantage is that it provides high-performance control,specifically high starting torque and excellent speed stability under load variations,without requiring an encoder feedback device.This simplifies the system,reduces wiring,and lowers the overall cost while still delivering performance superior to basic V/f control for a wide range of applications.
2.Can this 0.75 kW inverter be used in a three-phase power supply environment?
No,the GD20-0R7G-S2 model is specifically designed for a single-phase input power supply(220-240V AC).Attempting to connect it to a three-phase supply could damage the unit.For three-phase input applications,other models within the GD20 series,typically denoted with a different suffix,should be selected.
3.When is an external braking resistor required for this drive?
An external braking resistor is necessary in applications where the motor is required to decelerate large inertia loads rapidly,or where the natural deceleration time is too long for the process.Examples include vertical conveyors,centrifuges,or machinery requiring fast cycle times.The resistor prevents the inverter from tripping on an overvoltage fault by safely dissipating the regenerative energy.
4.How does the built-in PID controller enhance the inverter's functionality?
The integrated PID controller transforms the inverter from a simple speed controller into a process loop regulator.It allows the drive to automatically adjust the motor speed based on feedback from a sensor(e.g.,for pressure,flow,or temperature)to maintain a desired setpoint.This eliminates the need for an external process controller,simplifying the system architecture and reducing costs.
5.What are the key space-saving features of this compact frequency inverter?
The compact frequency inverter design is a primary feature.For models up to 2.2 kW,including the 0.75 kW GD20-0R7G-S2,the drive supports DIN rail mounting.This allows for high-density installation in control cabinets,saving valuable panel space compared to larger,flange-mounted units.Its reduced physical dimensions are a direct result of optimized thermal and electronic design.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a one-stop integrated service provider of intelligent manufacturing, belongs to the Gong Doctor Group, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1). Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3). At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
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info@zhongpingtech.com
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