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Electrical tool controller and electrical tool

A technology of electric tools and controllers, which is applied in the direction of AC motor control, control systems, electrical components, etc., can solve the problems of reducing the life of lithium batteries, damaging lithium batteries, and prone to over-discharge of batteries, so as to prolong the life of power supplies and protect Power supply, power saving effect

Pending Publication Date: 2019-10-25
斯泰宝机电科技(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, when the power device of the upper bridge arm of the controller is abnormally short-circuited, if the battery is still plugged into the machine, the discharge circuit will continue to discharge the battery. damage lithium battery

Method used

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  • Electrical tool controller and electrical tool
  • Electrical tool controller and electrical tool

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Experimental program
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Effect test

Embodiment 1

[0027] see figure 1 , the present embodiment provides an electric tool controller, including:

[0028] Control module 1, power module 2, phase wire sampling module 3, power module 4, control module 1 is electrically connected to power module 2, phase wire sampling module 3 respectively, power module 2 is electrically connected to phase wire sampling module 3, power module 4 respectively electrically connected to the control module 1 and the power module 2;

[0029] The power module 2 includes several power supply branches, each power supply branch includes an upper bridge arm power switch and a lower bridge arm power switch, the input end of the upper bridge arm power switch is electrically connected to the power module 4, and the output end of the upper bridge arm power switch It is electrically connected to the input terminal of the power switch of the lower bridge arm, the output terminal of the power switch of the lower bridge arm is grounded, and the control terminals of...

Embodiment 2

[0045] This embodiment provides an electric tool based on Embodiment 1, which adopts the electric tool controller as required by any one of Embodiment 1.

[0046] This embodiment is based on the power tool of the power tool controller, which can detect in real time whether the upper arm bridge power switch of the power module is short-circuited. If a short circuit occurs, the discharge circuit of the phase line sampling module can be cut off in time, and the power supply of the power tool, etc. can be protected to prevent It discharges for a long time.

[0047] Specifically, in this embodiment, the electrical signal output by the power module is sampled by the phase line sampling module of the electric tool controller. According to the sampled feedback signal, while realizing the power supply control of the motor, it can also detect the upper and lower parts of the power supply branch. Whether the power switch of the bridge arm is short-circuited. If the power switch of the up...

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PUM

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Abstract

The invention relates to an electrical tool controller. The electrical tool controller includes a control module, a power module, a phase line sampling module and a power source module, wherein the power source module is electrically connected with the control module and the power module, the power module includes multiple power supply branches, each power supply branch includes an upper arm powersource switch and a lower arm power source switch, an electrical connection point between the upper arm power source switch and the lower arm power source switch is a power supply output end of the power supply branch, the phase line sampling module is used for sampling an electrical signal outputted by the power supply branch to obtain a feedback signal, the electrical signal is used for drivinga motor of an electrical tool, the control module is used for determining the rotor position of the motor according to the feedback signal and controlling the power supply output of the power moduleaccording to the rotor position, and the control module is further used for determining whether the upper arm power source switch is in short circuit connection according to the feedback signal and controlling closing and opening of the phase line sampling module according to the determination result of the upper arm power source switch. The electrical tool controller has advantages of power saving, cell protection and long prolonged service life.

Description

technical field [0001] The invention belongs to the field of electric tools, in particular to an electric tool controller and the electric tool. Background technique [0002] Currently, electric tools using batteries are powered by lithium batteries. Lithium batteries have minimum discharge requirements, excessive discharge will seriously affect the life of lithium batteries, and even directly lead to the scrapping of lithium batteries. Due to cost constraints and versatility considerations, the lithium batteries of most power tools do not have over-discharge protection, so the controller connected to them needs to complete the over-discharge protection function. [0003] In order to realize the function of sampling the phase line voltage signal of the motor and charging the capacitor of the drive circuit of the upper bridge arm, the current controller connects a resistor R in series between the phase line and the ground. When the power device of the upper bridge arm is ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/06H02M7/5387H02H7/122H02H7/085H02H1/00
CPCH02P27/06H02M7/53871H02H7/1227H02H7/0838H02H7/085H02H1/0007
Inventor 李天宝
Owner 斯泰宝机电科技(昆山)有限公司