A kind of elevator power failure emergency power supply

Abstract

The invention discloses an elevator power failure emergency power supply which comprises an inverter, a storage battery, a charger and a contactor connected between the inverter and an elevator. The charger comprises an electric supply detection portion, is connected with the inverter and is arranged in the mode that the charger sends a control signal to the inverter according to whether electric supply is available. The inverter further comprises a switch and is arranged in the mode that when the electric supply detection portion detects an electric supply, the inverter does not work whether the switch is turn off or on; when the electric supply detection portion detects no electric supply is available and the switch is off, the inverter does not work; when the electric supply detection portion detects that the electric supply is available and the switch is on, the inverter is started and triggers the contactor to be connected so that power can be supplied to the elevator through the contactor. The elevator power failure emergency power supply can reduce unnecessary work time, prolong service life, is independent to a control system of the elevator and is suitable for elevators of various types.

Description

technical field [0001] The invention relates to a power supply device, in particular to an elevator power failure emergency power supply. Background technique [0002] The elevator uses the mains as the power source during normal operation, and uses the emergency power as the power source when the mains supply stops due to various reasons, so that the car runs slowly to the leveling position and opens the door to ensure the safety of the passengers. [0003] figure 1 It is a structural schematic diagram of the elevator power supply system in the patent document 200810131979.0. [0004] like figure 1 As shown, the drive system of the elevator includes a rectifier 102, a smoothing capacitor 103, an inverter device 104 and an elevator hoist 105. Among them, the rectifier 102 converts the AC voltage into a DC voltage, the smoothing capacitor 103 smoothes the output voltage of the rectifier 102, and the inverter device 104 converts the DC voltage smoothed by the smoothing capa...

AI Technical Summary

Problems solved by technology

[0007] From this it can be seen that figure 1 In the elevator power supply system shown, the inverter device 111 continues to work no matter during the normal power supply period of the commercial power supply 101 or during the emergency period when the battery 113 supplies power, so there is a problem that the service life of the inverter device is relatively short

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