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Warner Electric Modified ER VAR15 Brakes for Passenger Elevators
Warner Electric was selected by a large elevator OEM to develop a braking system for a challenging gearless motor elevator application that required dynamic torque < 160%, noise < 54 dB A and very high energy, up to 57kJ. To meet the tough requirements, Warner engineers worked closely with the customer’s engineering team as the elevator design evolved.
The braking system has the following three functions: ascending car overspeed
protection, unintended car movement protection and maintaining car position in
Engineers developed a solution that had low wear but high energy, noise dampening with
low torque impact combined with torque stability and precision. To meet the criteria, two
modified ERS VAR15 electrically released brakes with fixed magnets and a floating disc
were designed. The highly modular, compact units allowed the configured system to fit
within the customers tight footprint. Units are microswitch equipped, EC 95/16 certified
and provide EN81-1 redundancy.
The brakes were subjected to a full array of lengthy testing including energy, life cycle,
climatic, aging and destruction tests. Pre-packaged brake assemblies were delivered to
the customer with ready-to-mount paired magnets and burnished discs.
- Modified electrically released
dynamic torque < 160%
- Triple function: car
car movement and
- EC 95/16 certified with