The core mechanical structure of a passenger elevator is the traction system, mainly composed of a traction machine, wire ropes, a car, and a counterweight. These components are connected by wire ropes, which, driven by the traction machine, cause the elevator car and counterweight to move up and down along the guide rails inside the elevator. The traction drive uses a traction sheave as the driving component. The wire ropes are suspended from the traction sheave, with the car suspended at one end and the counterweight at the other. The friction between the wire ropes and the traction sheave generates traction force, driving the car's up and down movement. The brake is a crucial safety device for elevators.
Modern passenger elevators commonly employ fully computerized intelligent control systems and variable voltage variable frequency (VVVF) speed control systems. Fully computerized intelligent control enables multi-microcomputer, modular, and networked control, making installation and maintenance faster and more flexible. The VVVF speed control system, equipped with an AC asynchronous motor, can precisely adjust the motor speed according to different operating conditions and a preset optimal speed curve, achieving smooth start-stop, precise leveling, and energy-saving operation. Permanent magnet synchronous motors (permanent magnet synchronous gearless traction machines) are widely used due to their high efficiency and high power factor, significantly saving energy compared to traditional induction motors. Advanced elevators also employ modular control systems and energy regeneration technology, allowing the generated electricity to be fed back to the power grid as clean energy.
Passenger elevators are equipped with multiple safety systems, forming a complete safety protection system. Safety devices include speed governors-safety clamps (fall protection systems), buffers (to prevent over-the-top or under-the-bottom falls), door protection devices (such as infrared light curtains), power failure locking systems, emergency call and alarm systems, and backup power systems. Hall and car doors undergo rigorous impact testing to ensure reliability.
The interior design of the car prioritizes safety and comfort, featuring rounded corners for impact protection and a ventilation system to ensure air circulation. High-end passenger elevators offer numerous car interior design options. Complete interior designs can be selected from modern themes, or a combination of various materials and accessories can be used to create a unique appearance and style that matches the building's architectural style.
