Most elevators, whether traction or hydraulic, require a machine room to store large electric motors (or hydraulic pumps) and a controller cabinet. However, modern day traction motors boasting gearless and permanent magnet drive can be more compact and efficient because they use electronic microprocessors instead of mechanical relays. As a result, traction elevators (A.K.A. Machine-Room-Less or MRL elevators) can be built without a dedicated room above the shaft, saving valuable space in building planning.
SANYO lift design presents a departure from the traditional, looped over-the-top traction rope routing of traction elevators. The ends of the cables are fixed to the supporting structure, and the length of the cable are connected to the car and counterweight by means of a force-multiplying, energy saving compound pulley system. Machine-Room-less elevators have become a welcome alternative to the older hydraulic elevator for low to medium rise buildings.Machine-Room-Less (MRL) technology stands to bring rapid change to the elevator industry.