Technologies for improving the efficiency and modernizing elevators

Elevator inverters: energy efficiency, comfort and connectivity to upgrade existing systems

From reducing energy consumption to improving ride comfort, inverters are proving to be key players in lift modernisation projects, paving the way for increasingly connected and intelligent solutions.

ADL500: The WEG inverter for simple and safe modernisation

In the process of lift modernisation, drives are playing an increasingly central role. Their widespread adoption is linked to their ability to improve the performance of existing systems without resorting to invasive work, whilst offering tangible benefits in terms of energy efficiency, comfort and sustainability.

This is not merely a technological upgrade, but a shift in approach: rather than completely replacing systems, the focus is increasingly on upgrading key components to optimise their operation. “Inverters enable improved system efficiency, enhancing user comfort and overall performance,” notes Karim Boudaoud, Product Manager for the lifts segment at WEG Automation Europe.

Underpinning these benefits is the continuous control of motor speed, acceleration and torque via control algorithms integrated into the drive. Compared to traditional systems, the lift’s movement is smoother and more progressive, with jerk-free starts and stops and greater precision when stopping at each floor.

But it is above all in terms of energy efficiency that inverters demonstrate their potential. By adapting the motor’s operation to actual operating conditions, they reduce waste and enable savings of up to 50%. In some cases, it is also possible to recover energy during operation and feed it back into the building’s grid, further improving overall efficiency.

Added to these benefits is reduced wear on mechanical components: smoother acceleration and deceleration reduce stress on brakes, cables and gearboxes, helping to extend the system’s service life and keep maintenance costs down.

The potential of this technology is particularly evident in the vast existing lift fleet, especially in older systems. However, integration requires certain technical considerations, ranging from motor compatibility to the adaptation of control systems, which in some cases are still based on non-digital logic.

It is within this context that WEG Automation Europe presents its ADL500 range, developed specifically for lift applications and designed for both new installations and modernisation projects.

The series comprises three models — ADL510, ADL530 and ADL550 — designed to suit buildings with low, medium and high traffic intensity and complexity, offering a scalable and flexible platform.

One of the distinctive features is the high level of integration: the ADL500 range supports both open-loop and closed-loop asynchronous and synchronous motors and includes a universal encoder interface, simplifying integration with existing systems.

Particular attention has also been paid to ride comfort, thanks to high-performance control algorithms even in open-loop mode and advanced anti-rollback and pre-torque functions that ensure precise levelling and extremely smooth movements even in complex conditions.

Equally significant is the contribution to energy efficiency: the ADL500 range incorporates standby functions to eliminate waste, regeneration systems and solutions for reducing energy peaks, in line with the sector’s sustainability requirements.

Finally, connectivity is one of the most notable strengths. Thanks to compatibility with the main communication protocols (CANopen, CANopen Lift, DCP3/4, Modbus TCP), the ADL500 easily adapts to lift control boards on the market; and with the integration of Wi-Fi and Ethernet, the inverters allow for configuration, monitoring and diagnostics via an app in a simple manner and directly from a smartphone.

On the safety front, the range incorporates advanced functions such as Safe Torque Off (SIL3), brake control and monitoring, and protection against uncontrolled car movements, in line with the latest international standards.

The result is a solution that combines ease of installation, high performance and advanced management, making modernisation projects more accessible and sustainable.

Looking to the future, the evolution of inverters will continue to follow the path of digitalisation. Integration with sensors and IoT technologies will make predictive maintenance models increasingly widespread, based on continuous monitoring and real-time data analysis, not only to prevent breakdowns and schedule maintenance but also, increasingly, to improve the performance and efficiency of the systems.

This transformation confirms that lift modernisation increasingly relies on targeted, technologically advanced interventions capable of enhancing the value of the existing installed base without necessarily replacing it.

For further information, please email info.motion@weg.net or l find out more about the ADL500 series on the online product page.