Elevator energy-saving equipment suppliers remind you that the control of elevators by elevator frequency converters is S-shaped, which means that the acceleration during starting and stopping is relatively gentle, while during the intermediate process, the acceleration is relatively fast, mainly for the comfort of passengers. Energy saving is also one aspect, which is the general advantage of frequency converters. Due to its advantages such as simple circuit, high power factor, energy saving, smooth starting, and wide speed range, variable voltage variable frequency elevators have experienced rapid development.
Installation requirements for elevator frequency converter:
(1) General requirements for installation site:
No corrosion, no flammable or explosive gases or liquids; No electromagnetic interference; Dust free, floating fibers and metal particles; To avoid direct sunlight, the foundation and walls of the installation site should be sturdy, undamaged, and vibration free.
(2) Wiring of frequency converter:
Check if there is any wiring error; Check if the exposed part of the terminal wiring is in contact with the live parts of other terminals and if it touches the casing of the frequency converter; Check if the screw is tightened and if the wires are loose;
(3) Dismantling of the inverter cover plate:
During installation, the cover plate needs to be disassembled for testing, inspection, wiring, and other operations on the frequency converter.
(4) Environmental temperature:
It is generally suitable for working in environments with temperatures ranging from -10 ℃ to 40 ℃ and humidity levels below 90%. If the ambient temperature is higher than 40 ℃, the frequency converter should be reduced by 5% for every 1 ℃ increase. (5) Installation space and ventilation of frequency converter: The frequency converter is equipped with a cooling fan inside for forced air cooling, and must be installed vertically; When installing multiple frequency converters in the same device or control box, it is recommended to install them horizontally in parallel to reduce mutual thermal influence.
(6) Precautions for wiring control circuits:
The wiring between the control circuit and the main circuit, as well as the wiring between the control circuit and other power lines, should be separated and kept at a certain distance; The relay contact terminal leads in the control circuit should be routed separately from the connections to other control circuit terminals to avoid interference signals caused by contact closure or disconnection; In order to prevent interference caused by noise and other signals, shielded wires are used in the control circuit.
(7) Environmental temperature:
It is generally suitable for working in environments with temperatures ranging from -10 ℃ to 40 ℃ and humidity levels below 90%. If the ambient temperature is higher than 40 ℃, the frequency converter should be reduced by 5% for every 1 ℃ increase.
Raison d'utiliser la régulation de vitesse à fréquence variable dans les ascenseurs :
(1) Les ascenseurs à régulation de vitesse à fréquence variable conviennent aux moteurs asynchrones, qui présentent les avantages d'une petite taille, d'un faible encombrement, d'une structure simple, d'une maintenance facile, d'une grande fiabilité et d'un prix bas par rapport aux moteurs CC de même capacité.
(2) L'alimentation électrique à commande de vitesse à fréquence variable utilise la technologie SPWM avancée SVWM, ce qui améliore considérablement la qualité et les performances du fonctionnement de l'ascenseur ; Large plage de vitesse, haute précision de contrôle, bonnes performances dynamiques, confortable, silencieux et rapide, elle a progressivement remplacé la régulation de vitesse du moteur CC.
(3) L'ascenseur à régulation de vitesse à fréquence variable utilise la technologie SPWM avancée SVWM, ce qui améliore considérablement la qualité de l'alimentation électrique du moteur, réduit les harmoniques, améliore le facteur d'efficacité et d'efficience et permet de réaliser des économies d'énergie importantes.