Abstract: This article mainly introduces the application of the INVT EC300 variable-angle inclined elevator at the National Ski Jumping Center for the 2022 Beijing Winter Olympics. This article will elaborate the system configuration, technical difficulties and other details of this project, demonstrating the excellent performance with high performance and stability of the EC300 system in the application of the inclined elevator.
Keywords: EC300, four quadrant, inclined elevator solution, variable angle.
With the development of the building technology and changing needs of special occasion applications, common elevators and escalators have been unable to meet the requirements of some special projects. The National Ski Jumping Center for the 2022 Beijing Winter Olympics, located in the Zhangjiakou competition zone, is one of the largest and most technically challenging competition venues of the Winter Olympics. The National Ski Jumping Center is nicknamed "Snow Ruyi" thanks to its resemblance to the shape of a "Ruyi", a traditional Chinese ornamental object symbolizing good luck. On the outside of the "Snow Ruyi", there is a lift access from the bottom to the top of the jumping platform, which will play a very important role in connecting and carrying jumping platforms during the Winter Olympics. The "S-type" curve building and steep and complex mountain structure of the “Snow Ruyi” make the construction of the elevator much more difficult. In order to meet the needs of the overall project construction, the first inclined elevator project with an arc track came into being in China.
2. Configuration of the inclined elevator
Running on the arc track requires the elevator to achieve the real-time level control of the car on the arc track under different running speeds. The INVT EC300 elevator control system, combing with INVT GD800 series VFDs and servo drives, provides a perfect solution for this elevator project, ultimately realizing the perfect display and accurate operation of the 90kW variable-angle inclined elevator on site.
* Control and drive system——EC300 Features:
- Specialized and integrated design for elevators, with simplified wiring and easy commissioning.
- Supporting elevators to run in 64 floors at a maximum speed of 10m/s.
- With the highly efficient feedback grid energy-saving technology, the power saving rates can be up to 25-45%.
- The highly integrated power module innovatively integrates the controlled rectifier and inverter into one module.
- Supporting static component certification and multiple safety protection, complying with EN81 and GB7588 safety standards.
* Car level control system
Fig 1 Car level control system
The car dynamic leveling servo control system consists of one DPM control board, two angle sensors with independent sampling channels, two servo controllers with independent control channels, two robo cylinders, and the elevator control system.
The DPM board is the main controller of the car dynamic leveling servo control system, which monitors the level condition of the car through angle sensors installed at the bottom of the car and controls the height of two robo cylinders respectively through two servo controllers, so that the car is in a relatively level state in real time.
* Specific configurations
Car top board
Used to detect and control the car level angle.
ELGO LIMAX4R sensor
Used for car position and speed detection.
ELGO LIMAX4R magnetic strip
RION MCA416 angle sensor
Used to detect the car level angle.
DA200 servo drive
Used to drive the robo cylinder.
Servo motor (robo cylinder)
Used to control the car level angle.
Position switches 1-4
Used to detect the telescopic position of the robo cylinder.
Used to detect the opening area of the elevator.
- The inclined solution with variable angles solves the delivery problem of places effectively.
- The four-quadrant energy feedback function effectively saves 25%-45% of electric energy.
- Supporting stable operation in cold outdoor environments.
- Using the German ELGO positioning system, making car positioning control more accurate.
- Easy debugging: LCD operator with 10 rows display can show all the running state information, make debugging easier.
Higher performance and easy debugging save both time and material cost. With the advanced technology and high cost-effective, EC300 is more and more popular in the global market.