Elevators–using energy wisely
Our long-term commitment to developing energy-efficient elevators has created systems and functions that make intelligent use of power.
Eco Changes for a greener tomorrow
Regenerative Converter (Optional)
Elevators usually travel using power from a power supply (powered operation); however, when they travel down with a heavy car load or up with a light car load (regenerative operation), the traction machine functions as a power generator. Although the power generated during traction machine operation is usually dissipated as heat, the regenerative converter transmits the power back to the distribution transformer and feeds into the electrical network in the building along with electricity from the power supply. Compared to the same type of elevator without a regenerative converter, this system provides an energy-saving effect of up to 35%. (Reduction in CO2 emissions: 1400 kg/year) In addition, the Regenerative Converter has the effect of decreasing harmonic currents.
Enhancing Energy Efficiency
Traction Machine with PM Motor (Permanent Magnet Motor)
The joint-lapped core built in the PM motor of the traction machine features flexible joints. The iron core can be like a hinge, which allows coils to be wound around the core more densely, resulting in improved motor efficiency and compactness. High-density magnetic field is produced, enabling lower use of energy and resources and reduced CO2 emissions. In addition, we have adopted a 2:1 (single-wrap) roping system, which lessens load on the traction machine, and allows further reductions in traction machine size.