ReGen Drives The smart choice
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ReGen Drives Otis brings the advantages of regenerative-drive technology to The smart choice low- and mid-rise residential and commercial buildings. The compact modular design makes ReGen™ drives ideal for application on Gen2™ systems. Environmentally friendly • Energy savings (up to 75 percent) • Low harmonic distortion (typically below 5 percent) • Reduced Radio Frequency Interference Significant cost savings • Reduced peak power demand • Decreased energy consumption Optimal system performance • “Brown-out” tolerant, the drive can operate with voltage drops of up to 30 percent below the nominal value • State-of-the-art digital design provides a smoother ride and improved floor-to-floor time A ‘GREEN’ SOLUTiON As the product of choice for “green” building initiatives, ReGen™ drives deliver substantial energy savings while helping to meet or exceed established worldwide standards. Generating energy savings In a typical non-regenerative drive, energy is dissipated as heat in a set of resistors when braking occurs, resulting in reduced efficiency and creating additional waste-heat loads in the building. ReGen drives feed this energy back into the building’s internal electrical grid where it can be used by other loads or users connected to the same network. ReGen drives reduce energy usage by up to 75 percent compared to non-regenerative drives. The drives are so efficient that their power factor is close to unity. Minimizing harmonic distortion ReGen drives produce “clean power” — resulting in less pollution of the building’s electrical power system and helping to protect sensitive building equipment. The drives minimize distortion of the incoming sinusoidal waveform line current, making Total Harmonic Distortion (THD) at nominal load typically equal to or below 5 percent, versus more than 80 percent in non-regenerative drives. Reducing Radio Frequency interference (RFi) ReGen drives substantially minimize RFI, or Electromagnetic Interference (EMI) — virtually eliminating disruptions to other building electronic systems and ensuring compliance with strict regulations around the world. SiGNiFiCANT ANNuAL savings ReGen drives lower overall building operating costs, delivering significant annual savings to building owners and tenants year-after-year during the life of the elevator. The drives help reduce the two key factors that influence energy costs, peak power demand and energy consumption. As a result, both the fixed costs based on peak power demand (kilovolt amperes or kVA) and variable costs based on energy consumption (kilowatt-hours or kWh) decrease. Electrical power is generated when the elevator travels up with a light load, travels down with a heavy load and during the elevator system deceleration. In effect, a fully loaded, descending elevator can now provide a significant portion of the power for an adjacent ascending elevator. The amount of energy savings due to regeneration depends on various system parameters and configurations such as car load, speed, length of run, traffic pattern and system efficiency. Modeling and simulation results show that ReGen drives use substantially less energy than non-regenerative drives for equivalent elevator motion. (See energy savings example on back page.) As a “green,” cost effective option for the Gen2 system, ReGen drives are the smart choice for your next low- or mid-rise installation.

OPTiMAL SYSTEM PERFORMANCE “Brown-out” tolerant ReGen drives will continue to operate with acceptable levels of degradation (reduction of contract speed and acceleration rates) in the event of voltage drops as low as 30 percent below the nominal value, providing a significant advantage in areas where voltage fluctuations are common. Superior ride quality and performance State-of-the-art, 32-bit high-speed digital signal processors and new control algorithms for profile generation and position accuracy result in a smoother ride and improved floor-to-floor time compared to a non-regenerative...