INVT GD390L Elevator-specific AC Drive for Integrated Elevator Control System Upgrade in India

Background

With the rapid advancement of industrial technology, elevator control and drive technologies are also continuously evolving. Traditional control methods utilizing "control board + frequency drive" setups with multi-speed steps and analog signals are increasingly struggling to meet current market demands for high integration, intelligence, and strong product binding. New product concepts like elevator integrated controllers and integrated control panels are gradually replacing older solutions, offering significant improvements in operational performance, efficiency, stability, ease of installation, and post-maintenance.

Customer Needs

INVT's customer, an Indian elevator control board company, specializes in the R&D and production of its own branded elevator control boards and has established a significant presence in the local market. However, due to a singular product structure reliant on purchasing external frequency drives for control panel assembly, their profit margins were being squeezed by the frequency drive manufacturers. Additionally, the risk of control boards and frequency drives within the control panel being replaced by third parties threatened the continuity of maintenance contracts, hindering market expansion and revenue growth. Limited by their technical capabilities, the company could only implement multi-speed control schemes, resulting in suboptimal elevator operational efficiency and ride comfort. Consequently, the customer urgently needed to develop their own integrated elevator controller, achieving a unified control and drive design, enhancing product binding, and incorporating high-performance drive capabilities to boost their market competitiveness.

INVT Solution

Leveraging years of deep involvement in the elevator industry, INVT keenly identified the market need for high integration, intelligence, and strong product binding, and launched the new-generation elevator-specific frequency drive – the GD390L. This product utilizes INVT's latest high-performance drive technology combined with advanced drive algorithms, enabling precise control of elevator starting, stopping, and operation at various speeds. The GD390L features built-in direct landing technology and employs a dual-CPU design, facilitating flexible functional expansion through secondary integration development by customers.

Solution Advantages

• High Performance: Utilizes a new generation of high-performance drive technology for smooth elevator starts/stops and precise speed control. An optional built-in C2 filter meets European EMC standards.

• High Safety: Integrated STO (Safe Torque Off) safety function with dual-redundancy detection meets SIL3 safety level requirements.

• High Integration: Features a dual-CPU design separating control and drive functions for seamless secondary development. The proprietary communication binding technology effectively prevents unauthorized replacement of control boards or frequency drives by third parties, ensuring long-term customer benefits and market protection.

  
  

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Customer Benefits

• Enhanced Product Competitiveness: Through integrated development with the GD390L, the customer's product evolved from a single control board to an integrated elevator machine combining control and drive functions. The exclusive communication binding prevents control board or drive replacement, protecting customer profits and market control.

• Performance Improvement: Fully leverages the GD390L's drive performance to achieve precise control of elevator operation, enhancing overall operational quality.

• Efficiency Gains: By directly utilizing the GD390L's built-in direct landing algorithm via communication, smooth station-to-station operation in a single step is achieved, significantly improving elevator operational efficiency and ride comfort.

• Safety and Reliability: Utilizing the GD390L's dual-redundancy STO safety function allows the frequency drive output to be directly connected to the motor, enhancing safety while eliminating the need for an output contactor, reducing costs.

Summary

Building on years of technical expertise across various industries and sustained focus on the elevator market, INVT continuously introduces control and drive system solutions that meet market demands. The initial success of this GD390L integrated development solution has significantly enhanced the customer's product competitiveness. Moving forward, INVT will continue to increase R&D investment in elevator products, providing customers with higher quality, more efficient elevator solutions, and contributing to the ongoing intelligent development of the elevator industry.