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Electric tool and control method thereof

A technology of electric tools and tools, which is applied in the field of excitation or armature current control, electric vehicles, collectors, etc., and can solve problems such as low cutting efficiency, affecting continuity, and not fully utilizing batteries

Active Publication Date: 2016-01-06
NANJING CHERVON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When cutting some heavy-duty DC power tools, when using a battery pack with low discharge capacity, if the speed design is too high, the machine will easily enter the over-current protection or temperature protection state and stop working, affecting the continuity of actual use; When using a battery with a large discharge capacity, if the speed design is low, the cutting efficiency is low, and the battery capacity is not fully utilized.

Method used

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  • Electric tool and control method thereof
  • Electric tool and control method thereof
  • Electric tool and control method thereof

Examples

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Embodiment Construction

[0024] refer to figure 1 As shown, the electric tool 100 of the present invention includes: a main tool 10 and a battery pack 20. It should be noted that, in order to make the main tool 10 continue to work by replacing different battery packs 20 or to adapt to the needs of different use durations, the electric tool 100 can be There are several different battery packs 20 . figure 1 The illustrated power tool 100 is preferably a trimmer.

[0025] refer to Figure 2 to Figure 3 As shown, the tool host 10 includes: a motor (not shown in the figure), and a controller (not marked in the figure).

[0026] The controller controls the rotation of the motor, and when the current of the motor exceeds the current protection threshold range preset by the controller, the controller controls the motor to perform overcurrent protection.

[0027] The battery pack 20 includes a plurality of battery packs 201, different battery packs 201 are connected in series, the battery pack 201 includes ...

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PUM

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Abstract

The invention discloses an electric tool. The electric tool comprises a tool host and multiple cell packets used for supplying power for the tool host, wherein the tool host comprises a motor and a controller, the motor is controlled by the controller to rotate, current of the motor surpasses a preset current protection threshold scope of the controller, the motor is controlled by the controller to realize overcurrent protection, the cell packets internally comprise multiple electric core sets, different electric core sets are in series connection, the electric core sets respectively comprise more than one electric core unit, the electric core units belonging to one same electric core set are connected in parallel, and the controller at least comprises an identification module capable of automatically identifying the cell packets and at least a driving module used for driving the motor according to the identification result to output at a rotation speed corresponding to the identification result. The invention further provides a control method for the electric tool. The electric tool can identify the different cell packets and controls the rotation speed of the motor according to power supply capability of the cell packets.

Description

technical field [0001] The invention relates to an electric tool, in particular to an electric tool with motors having different rotating speeds and a control method thereof. Background technique [0002] Normally, when a DC electric tool without switch speed regulation function is used with the corresponding battery pack, the output speed is the set value. Considering the requirements of high cutting efficiency and section quality, it is usually desirable to have a higher speed of the tool. When cutting some heavy-duty DC power tools, when using a battery pack with low discharge capacity, if the speed design is too high, the machine will easily enter the over-current protection or temperature protection state and stop working, affecting the continuity of actual use; When using a battery with a large discharge capacity, if the speed design is low, the cutting efficiency is low, and the battery capacity is not fully utilized. Contents of the invention [0003] In order to ...

Claims

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Application Information

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IPC IPC(8): H02P7/06H02H7/085H02J7/00H01M10/44
CPCY02E60/10
Inventor 付慧星
Owner NANJING CHERVON IND
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