A three-phase power supply phase loss and reverse phase protection method and device

Abstract

The invention provides a three-phase power supply phase loss and reverse phase protection method and device, comprising: when the three-phase power supply to be detected is powered on, collecting the first electrical signal output from the first terminal of the electric control board and the signal output from the second terminal The second electrical signal, wherein the first electrical signal and the second electrical signal are the signals of the first phase current, the second phase current and the third phase current output by the three-phase power supply to be detected after being rectified by the electric control board; according to the first The electric signal and the second electric signal determine whether the three-phase power supply to be detected is in reverse phase, if so, execute S3, otherwise, execute S4; S3: output the first prompt information for prompting the reverse phase of the three-phase power supply to be detected, and execute S6; S4: According to the first electrical signal and the second electrical signal, determine whether the three-phase power supply to be detected is out of phase, if so, execute S5; S5: output the second prompt information for prompting the lack of phase of the three-phase power supply to be detected, and execute S6 ;S6: Control the motor to stop running. The solution can improve the efficiency of testing the lack of phase and reverse phase of the three-phase power supply to be detected.

Description

technical field [0001] The invention relates to the field of smart home appliances, in particular to a method and device for protecting a three-phase power supply against phase loss and reverse phase. Background technique [0002] With the development of the economy, home appliances have become an essential product in people's lives, saving people a lot of housework and making great contributions to home life. [0003] At present, for home appliances using a three-phase power supply to be tested, the motor cannot be operated in a power supply environment with a lack of phase, especially a reverse phase, otherwise the motor will be damaged. Therefore, equipment inspectors are required to manually inspect the three-phase power supply to be inspected of the household electrical appliances. [0004] It can be seen from the above description that in the prior art, manually checking whether the three-phase power supply of the household electrical appliance to be tested is out-of-...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above description that in the prior art, the efficiency of the inspection is low by manually inspecting whether the three-phase power supply of the household appliance to be inspected is out of phase or reversed.

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