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Safety is a priority for contactor-free elevator drives
The Taiwanese automation supplier Delta Electronics has announced a new generation of elevator drives with safety as a top priority, offering built-in safe torque off (STO), as well as compliance with EN81-20 and EN81-50. The compact EB3000 drives ensure smooth, comfortable rides for passengers. They are said to be easy to install, maintain and troubleshoot, and offer wireless control via Bluetooth.
“Our new EB3000 drives are the answer to what elevator manufacturers have told us about their needs,” says Tim Lee, vice-president and general manager of Delta’s Industrial Automation business in the EMEA region. “The market is evolving, and a wider variety of buildings are incorporating elevators of different sizes and types.
“It’s extremely difficult to find a high-end, closed-loop drive option with this feature set anywhere else,” he adds. “We are happy to be able to provide this new line with both STO SIL3 and CANlift integrated, eliminating the need for two contactors and allowing integration with a broad range of motor types.”
The drives’ front panel is smaller than a sheet of A4 paper. They are said to fit easily into all types of elevator and building, including machine-room (MR) and machine-room-less (MRL) configurations, in low- or high-rise buildings. They are suitable for new buildings or retrofits, and are available with built-in EMC filters.
Direct landing and torque control capabilities enhance passenger comfort. Direct landing helps them to get to their destinations faster without feeling creep when the elevator stops, while precise torque control offsets rollback for smooth starts.
The STO function prevents the lift motor from producing unexpected torque forces. A “trapping prevention” function avoids the risk of passengers becoming trapped in a lift if an encoder fails.
The contactor-free drives help users to lower TCO (total cost of ownership) by reducing motor and EMC filter wiring, and integrating a datalogger to enhance repair efficiency. The datalogger supports 20 channels, six trigger modes, and three sampling times. Users can preset variants and identify errors to reduce troubleshooting times.
The drives support the CANopen Lift CiA 417 protocol for standardised communications between elevator components, as well as Modbus for serial links between the lift controller and drive. The drives support a choice of incremental encoders including several with absolute position, such as EnDat 2.2, SSI and BiSS-C.
The EB3000 drives can connect to mobile devices via Bluetooth, allowing wireless control. Auto-tuning, external monitors, parameter adjustments, oscilloscopes and file managers are all available.
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