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Method of diagnosing inverter trouble

An inverter and fault technology, which is applied in the field of inverter fault diagnosis, can solve the problems that users cannot identify faults, users have accidents, etc.

Inactive Publication Date: 2004-10-20
LG IND SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if the inverter is already powered on, the user cannot identify the fault until the user inputs an operation command to the inverter
Therefore, if an inverter failure occurs under such conditions, there is a possibility of an accident for the user

Method used

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  • Method of diagnosing inverter trouble
  • Method of diagnosing inverter trouble
  • Method of diagnosing inverter trouble

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Embodiment Construction

[0018] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description and drawings, the same reference numerals are used to designate the same or similar components, and thus repeated explanations for the same or similar components are omitted.

[0019] FIG. 3 is a flowchart showing a method for diagnosing an inverter fault according to an embodiment of the present invention when power is supplied to the inverter. As shown in Figure 3, the method for diagnosing an inverter includes the following steps: powering on the inverter (S201); initializing the inverter when the inverter is powered on (S202); sequentially turning on the switching devices one by one (with reference to Fig. 1) to diagnose inverter failure (S203); Judge the failure of switchgear (S204); Record the category and fault state (S205) of the switchgear taking place in failure; If switchgear does not have fault, just from inverter ...

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Abstract

Disclosed is a method of diagnosing inverter trouble capable of improving convenience of use and safety of the user by notifying the user of the error of switching devices used for outputting AC voltage of the inverter and the earth fault of an output of the inverter when applying power to the inverter. The method includes the steps of determining whether or not each of switching devices has a fault by sequentially switching on the switching devices when an inverter is initialize by receiving power, recording sorts and fault states of the switching devices having the fault, detecting whether or not an earth fault occurs by outputting each phase voltage of the inverter, recording phases having the earth fault and an earth fault state thereof, determining the inverter trouble with reference to a fault record of the switching devices and an earth fault record, and waiting for a normal operation if the inverter has no trouble, and waiting for an order of a user if the inverter trouble occurs while displaying the inverter trouble.

Description

technical field [0001] The present invention relates to a method for diagnosing inverter faults, and more particularly, to a method for diagnosing inverter faults, which is capable of detecting and notifying the user for output inverters when powering the inverter The error of the switchgear of the AC voltage of the inverter and the ground fault of the inverter output improve the convenience of use and the safety of the user. Background technique [0002] As generally known in the art, inverters have a fault protection function, so that after the inverter is powered on, if a failure of the inverter is detected in response to an operating signal of the inverter, the inverter is immediately displayed. mistake. [0003] FIG. 1 is a block diagram showing the structure of a conventional three-phase switch for an output AC voltage of an inverter. Existing three-phase switches include: positive and negative voltage lines 11 and 12, which are used to supply DC voltage 13 to the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02H02M7/48
CPCG01R31/025H02M7/48G01R31/52G01R31/40H02M1/32
Inventor 金敏极
Owner LG IND SYST CO LTD