OTIS DAA20220EA Traction Machine

OTIS DAA20220EA traction motor stands as a pinnacle of engineering, designed to serve as the powerful core of elevator systems in the world's most demanding high-rise buildings. This ultra-heavy-duty machine is built to deliver unmatched performance and reliability for the vertical transportation of people and goods in intensive commercial building environments, such as skyscrapers, large corporate towers, and high-traffic facilities. Its primary role is to provide the smooth, controlled, and powerful force required to move large elevator cars with exceptional precision.

This model is distinguished by its extraordinary weight capacity, supporting a rated payload range from 1150kg to an impressive 2000kg. This immense capacity makes it ideal for moving large groups of people efficiently or handling heavy freight loads with ease. Operating at a rated speed of 1.0m/s to 2.5m/s, it ensures rapid transit between floors, drastically reducing journey times in very tall structures. The foundation of its smooth operation is its 32 motor poles, which provide exceptional control over torque, resulting in seamless acceleration and deceleration for a superior passenger experience.

Constructed to endure the rigorous conditions of a modern elevator machine room, the DAA20220EA is equipped with a Protection Class of IP41. This ensures critical internal elevator components are defended against solid particle ingress and dripping water, guaranteeing operational integrity and longevity. Complementing this is an Insulation Class: F, which allows the motor's windings to perform reliably at high temperatures, a crucial feature for maintaining performance during prolonged and heavy use cycles.

The most defining characteristic of the DAA20220EA is its monumental mechanical strength, evidenced by a maximum axial load of 6,000 kg. This exceptional rating highlights its ability to withstand the tremendous forces generated by the elevator ropes and weights in super-tall structures. It is recommended for a lifting height of up to 140 meters, confirming its status as a premier solution for the tallest high-rise buildings. The braking system is engineered to match this power, featuring dual-arm brakes that deliver a colossal braking force ranging from 3,400 Nm to 6,800 Nm, controlled by a brake current of 2.24 A (at 20°C), ensuring absolute safety and control.

Operating on an S5 40% duty cycle, this OTIS traction motor is perfectly designed for the stop-start nature of elevator service. This cycle, which includes starting, running at constant load, electric braking, and rest, is optimized to manage heat and energy consumption effectively. This ensures the system operates efficiently, contributing to lower operational costs and enhanced sustainability for the building. In summary, the OTIS DAA20220EA traction machine is the definitive choice for projects where ultimate capacity, reliability, and performance in vertical mobility are non-negotiable.

Question and Answer (Q/A) about OTIS Traction Motor

Q1: What makes the OTIS DAA20220EA suitable for skyscrapers and ultra-high-rise buildings?
A1: This motor is specifically engineered for skyscrapers due to its combination of a 140-meter recommended lifting height, a very high 2000kg payload capacity, and an extremely robust maximum axial load rating of 6,000 kg. These specifications allow it to handle the long travel distances and significant mechanical stresses found in the world's tallest buildings.

Q2: Why does this motor have such a high braking force compared to other models?
A2: The braking force (3,400 - 6,800 Nm) is directly proportional to the motor's power and the load it carries. A 2000kg elevator car traveling at 2.5m/s possesses a tremendous amount of kinetic energy. The ultra-high braking force is essential to safely and effectively stop that inertia, ensuring passenger safety and system reliability.

Q3: Can this motor be used for both passenger and freight elevator applications?
A3: Absolutely. Its wide payload range (1150kg to 2000kg) makes it incredibly versatile. It can be configured for high-capacity passenger elevators in busy office towers or for heavy-duty freight elevators that move large equipment and goods within a building.

Q4: How does the Insulation Class F contribute to performance in heavy-use scenarios?
A4: Insulation Class F means the motor can operate at a higher temperature without damage. In a busy commercial building with constant elevator traffic, the motor will generate heat. The Class F insulation ensures it can handle these thermal demands without degrading, which is critical for maintaining uptime and longevity.

Q5: What is the significance of the maximum axial load rating of 6,000 kg?
A5: This is a critical safety and durability specification. It indicates the maximum force that can be applied along the motor's shaft by the entire elevator system (car, counterweight, and ropes). This massive rating ensures the motor's bearings and structural housing are built to withstand the immense forces present in a system designed for a 2000kg car in a 140-meter-high building, preventing mechanical failure.