EC7 Series High Performance Inverter

Recently, China Metallurgical Southern Automation has launched a new generation of industrial transmission products --- EC7 series of high-performance inverters, which are designed to meet the needs of complex applications such as process lines and precision machining machines, following the introduction of the EC5 series of universal inverter products. The design and development of engineering-grade inverters.

Adopting the future-oriented modular design concept, the new generation of EC7 series includes single-drive and multi-drive product types. It is available in books, devices and cabinets, and supports the AC380V/690V voltage range. With flexible configuration, the EC7 series can support solutions up to 4500 kW to meet the needs of industries such as metallurgy, pulp and paper, oil and gas, mining, ports, marine and power, and can be based on paper machines, winches, rolling mills, Large-scale applications such as process lines, roller tables, shields, cranes and rigs provide customized solutions.

The core technology used in the EC7 series is the latest motor control technology from China Metals, Inc. – Intelligent Dynamic Adaptive (IDATM) and Intelligent PID Self-Adjusting (SPIDTM) technology. Equipped with this technology platform, EC7 series can adapt to changes in motor parameters in real-time under both offline and online operating conditions. Through intelligent parameter adjustment, it always maintains the best match with the motor and keeps the system in full operation. Excellent control performance.

More flexible product structure

In order to meet the needs of complex processes, the current EC7 family offers a total of 5 products:

EC750 adopts integral design of rectifier and inverter units, and is directly applied in the field of high-precision single-drive.

The EC751 is an independent inverter unit, and multiple inverter units are powered by a common DC bus to drive the motor to form a complex multi-drive system.

EC752 is a basic rectifier unit, providing a stable power supply for the common DC bus;

EC753 is a feedback-type rectifier unit, and the energy feedback function is added to the basic rectifier unit to feed the bus energy back to the grid.

The EC754 is an active rectifier unit that provides high-performance rectification/feedback control and generates an adjustable DC link voltage.

The EC7 series adopts a common DC bus technology solution. The user can select the inverter unit according to the more flexible number of transmissions, and select the type of the rectifier unit according to the requirements of energy feedback. Multiple independent inverter units can share one rectifier unit, greatly reducing the size of power supply equipment in the inverter, reducing the number of wiring and floor space, saving investment and reducing maintenance costs. The DC bus regeneration energy recovery technology further saves system energy and costs.

The EC750, EC751, and EC752 products in the first EC7 series have been widely used by industrial companies such as Taigang and Shougang and have received great attention and praise.

More high performance indicators

Based on the full application of intelligent control technology, EC7 series has more excellent performance than traditional frequency converters.

In terms of speed control, EC7 series provides highly accurate speed control, with a steady-state speed accuracy of 0.003%, speed pulsation up to 0.02%, dynamic speed change of less than 5%, and minimum frequency output resolution of 0.01Hz, making it suitable for high-accuracy positioning Synchronous control, high-precision master-slave control, and high-precision multi-point positioning control.

In terms of torque control, EC7 series provides 200% starting torque (with speed feedback) at 0Hz, torque accuracy of 1%, torque ripple of 3%, and more stable operation, mainly used in high-precision tension control , electromagnetic stirring, high speed winding control.

In terms of dynamic performance, the EC7 series equipped with advanced fuzzy control technology can be perfectly improved, and the system robustness is also greatly enhanced. The full-load 2% speed step response time is less than 70ms, and the 20% torque step response time is less than 15ms. Overshoot is less than 0.5%. This performance also makes the EC7 series have excellent performance in resisting sudden interference from the outside world. It can instantly return to normal from transitional speed and is suitable for applications such as cold rolling and severely fluctuating environments.

More flexible operation design
The EC7 series provides a free version of DriveInspector software (PC version), which allows users to customize the inverter according to their preferences and find the best configuration quickly and reliably. The MobileInspector software (mobile version) released at the same time can be easily monitored and diagnosed by installing it on Android 2.2 or higher smart phones.

DriveInspector software uses visualization technology that integrates quick features for many standard application requirements. In the graphics editor, by dragging and dropping the free function block and parameter interconnection settings, the configuration and monitoring of the inverter can be completed, which greatly accelerates the debugging speed and improves the performance of the entire machine; the built-in macro application and custom macro functions make the driver The application is simpler and further reduces the debugging time.

The EC7 uses an innovative control panel with an intuitive 5-line high-definition Chinese LCD display that provides easy navigation through the three-level function code menu. The USB interface allows the PC tool to easily connect with the drive of the inverter, and supports many user-friendly designs such as live hot swap, multi-parameter on-line display, and batch parameter copying.

The launch of MCC Southern Automation's EC7 series of high-performance inverters has greatly compensated for the lack of domestic brands in the field of intelligent industrial transmission. Currently, China Metallurgical Southern Automation has fully launched the nationwide market for this product, and sales and service network activities in more than 30 cities are about to start.