Electric tool, electric tool load state detection circuit and detection method

Abstract

The invention discloses an electric tool, an electric tool load state detection circuit and a detection method. The electric tool load state detection circuit comprises a main control chip unit, a sampling resistor, a voltage sampling unit and analarm display unit, wherein the sampling resistor is arranged on a driving loop of the motor; the voltage sampling unit is used for sampling the voltage at the two ends of the sampling resistor; and the alarm display unit is connected with the main control chip unit, and the main control chip unit is configured to control the alarm display unit to execute a preset display state according to the voltage signals, acquired by the voltage acquisition unit, of the two ends of the sampling resistor. By means of the electric tool, a user can be visually reminded of the cutting force in the using process of the electric tool, the relative cutting consistency can be kept, the using hand feeling of a product is improved, the user is more satisfactory, and the product competitiveness is comprehensively improved.

Description

technical field [0001] The invention relates to the technical field of load state detection, in particular to an electric tool, an electric tool load state detection circuit and a detection method. Background technique [0002] In the design of the alarm mechanism of the current cutting saw or chain saw, LED lights are mostly used to realize the abnormal alarm function, or some products do not have this function at all. , or over-temperature and other protection functions, it will automatically stop and alarm. On the one hand, it is impossible to predict the magnitude of the current load in the cutting process in advance, and it will cut until the over-current protection stops. It will cause overheating and protection, which will affect the cutting experience and other aspects of experience. Contents of the invention [0003] In view of the above shortcomings of the prior art, the object of the present invention is to provide an electric tool, an electric tool load state...

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Problems solved by technology

[0003] In view of the above shortcomings of the prior art, the object of the present invention is to provide an electric tool, an electric tool load state detection circuit and a detection method, which are used to solve the problem that the current load cannot be predicted in advance during the cutting process of the electric tool in the prior art. And during the cutting process of electric tools, due to over-current shutdown, the temperature of the motor coil rises faster, resulting in over-temperature protection, which affects the cutting experience and other technical problems

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