The demands on elevator technology have risen steadily in the past years: Not only are faster speeds and greater conveyor heights required, but also compact designs and low operating costs. And the most comfortable of rides: smooth starting and continuous acceleration are as much a prerequisite for a pleasant ride without undesirable loads as are gentle braking and traverse to the exact target position. The drive control plays an important role here.

The trend continues toward gearless drive machines, which offer a series of economical and environmental advantages: elevator systems with little vibration or noise; reduced spatial requirements permit machine-room-less (MRL) elevators; comfortable ride properties; low energy consumption; freedom from maintenance and oil.

Permanent-magnet synchronous motors are often used because of the greater power density. Depending on the control strategy, these types of motors require absolute position information for correctly controlling the rotor position. This position information can be provided by an absolute rotary encoder or an incremental rotary encoder with commutation signals, for example.

Rotary encoders manufactured by HEIDENHAIN, are suitable to drive the elevator and to the right, safe and silent door control.

ERN incremental rotary encoders

ECN absolute singleturn encoders

EQN/IQN absolute multiturn rotary encoders with mounted stator coupling

RIQ absolute multiturn rotary encoders for separate shaft coupling

ERO modular incremental rotary encoders

ECI absolute singleturn rotary encoders

EQI absolute multiturn encoders

Rotary Encoders for the Elevator Industry
Brochure (English version, PDF file, 0.5 MB)