Power-off protection method and device

A power-off protection and circuit technology, which is applied in the field of power-off protection methods and devices, can solve problems such as equipment failure to start automatically, energy waste, safety accidents, etc., and achieve the effect of not affecting work efficiency
CN106207971AInactive Publication Date: 2016-12-07PANAN JIARUN ELECTRICAL APPLIANCE CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
PANAN JIARUN ELECTRICAL APPLIANCE CO LTD
Publication Date
2016-12-07
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a power-off protection method and device, relates to the technical field of power-off protection, and aims at solving the problems that control of the prior art is inaccurate and the reliability is low. The power-off protection method comprises the steps as follows: power interruption information of a motor is continuously monitored through a power-off protection module; when the power interruption duration is smaller than 80ms, the power-off protection module does not start protection and the motor normally works after being powered up; when the power interruption duration is greater than 80ms, the power-off protection module starts protection, the motor does not work after being powered up, and the power-off protection module returns to initialization; and if a motor switch is in an off state, the motor does not work and the motor can be started by turning off the motor switch and then turning on the motor switch. By the power-off protection method and device, whether the motor is normally powered off or abnormally powered off can be accurately judged; the work efficiency is not affected; and the power-off protection method and device are safe and reliable.
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Description

technical field

[0001] The invention relates to the technical field of power-off protection, in particular to a method and device for power-off protection with precise control and high reliability. Background technique

[0002] At present, whether it is in the construction process or in family life, power outages may occur. If the equipment user forgets or fails to turn off the switch button of the equipment in time, the equipment will be powered on and start working after the power supply is restored, which may cause equipment or personnel. safety accidents, resulting in waste of energy. For electric tools such as angle grinders, in order to avoid pressing the power switch with fingers for a long time during use, people add a self-locking device to the switch button of the electrical appliance and power tool. Press the button of the self-locking device to lock the switch button , At this time, even if you let go of your finger, the power tool will not be powered off. Only ...

Claims

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