Ballast detection protection method and system

Abstract

The invention provides a ballast detection protection method and system. The ballast detection protection method includes the following steps: S1, closing a PFC and a relay in a circuit; S2, detectingthe input voltage, and judging whether the input voltage is ultrahigh; S3, opening the PFC and the relay in the circuit; S4, carrying out ignition, and detecting whether the working parameters of thecircuit are abnormal; S5, closing the output and the PFC and the relay in the circuit, adding 1 to the number of abnormities, and reporting error synchronously; S6, judging whether the number of abnormities reaches 5, locking a ballast if the number of abnormities reaches 5, otherwise, performing S7; and S7, judging whether the time for next ignition arrives. The safety of an electrolytic capacitor under abnormal input voltage can be ensured. The relay can be prevented from being opened in time. The high voltage is only applied to a voltage dependent resistor after passing through a current limiting resistor. In the normal working process of the ballast, the values of leakage current and other parameters can be constantly detected, and the output can be cut off immediately to protect thepower supply once there is an abnormality.

Description

technical field [0001] The invention relates to the technical field of ballast protection, in particular to a ballast detection and protection method and system. Background technique [0002] HID (High intensity Discharge) is the abbreviation of high-pressure gas discharge lamp, which generally consists of a high-voltage package, a ballast (ballast), and a bulb. During the HID working process, when the input voltage is too high, it will directly enter the electrolytic capacitor and damage it. Moreover, for abnormalities that are difficult to detect such as leakage current, there is a gap in the protection function, which is not conducive to the protection and safe operation of the HID. [0003] Therefore, in view of the above problems, it is necessary to propose a further solution. Contents of the invention [0004] The present invention aims to provide a ballast detection and protection method and system to overcome the deficiencies in the prior art. [0005] In order ...

AI Technical Summary

Problems solved by technology

During the HID working process, when the input voltage is too high, it will directly enter the electrolytic capacitor and damage it

Moreover, for abnormalities that are difficult to detect such as leakage current, there is a gap in the protection function, which is not conducive to the protection and safe operation of HID

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