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Electric hammer and control method thereof

A control method and electric hammer technology, applied in the direction of manufacturing tools, motor generators/starters, motor parameter estimation/correction, etc., can solve the problems of electric hammer starting current increase controller, electric hammer starting failure, etc. Achieve the effect of reducing the starting current of the electric hammer and solving the failure of starting at low temperature

Active Publication Date: 2021-05-07
HUIZHOU TOPBAND ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an electric hammer and its control method, which aims to solve the problem that the starting current of the electric hammer increases due to the solidification of butter at low temperature, and the controller enters the overcurrent protection, which makes the electric hammer fail to start.

Method used

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  • Electric hammer and control method thereof
  • Electric hammer and control method thereof
  • Electric hammer and control method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] see figure 1 , is a schematic flowchart of a method for controlling an electric hammer provided in Embodiment 1 of the present invention, and the method includes the following steps:

[0029] Step S01, judging whether the electric hammer is in the starting state.

[0030] The starting state of the electric hammer in this embodiment refers to a state between the motor of the electric hammer starts to rotate and works normally. It can be judged whether the electric hammer is in the starting state by whether the motor of the electric hammer is rotating.

[0031] Specifically, the number of commutation steps of the motor is monitored in real time, and when the number of commutation steps of the motor is greater than zero, the motor rotates and the electric hammer is in a starting state. In addition, by increasing the start button feedback, the start signal is triggered when the start switch is turned on, and the controller judges the current state of the electric hammer a...

Embodiment 2

[0047] Further, see figure 2 , is a schematic flowchart of a control method for an electric hammer provided in Embodiment 2 of the present invention. The difference between Embodiment 2 and Embodiment 1 is that the electric hammer includes a switch for controlling the starting current, and the magnitude of the starting current is related to the switching range of the switch. The data are positively correlated. After step S04 in the first embodiment, the method also includes:

[0048] Step S05, obtaining the current output duty cycle of the electric hammer in the low-temperature start-up current-limiting mode.

[0049] Step S06, receiving the switch range data transformed by pressing the switch, and reducing the electric hammer current according to the switch range data.

[0050] In step S07, the converted output duty ratio is obtained by calculating according to the reduced current.

[0051] Step S08, judging whether the converted output duty cycle is smaller than the current...

Embodiment 3

[0056] see image 3 , is a schematic flowchart of a method for controlling an electric hammer provided in Embodiment 3 of the present invention. The difference between Embodiment 3 and Embodiment 1 is that after step S04 in Embodiment 1, the method further includes:

[0057] Step S010, detecting the running time of the electric hammer in the low-temperature start-up current-limiting mode.

[0058] Step S011, judging whether the running time is longer than the preset time.

[0059] Step S012, if yes, control the electric hammer to exit the low-temperature start-up current-limiting mode.

[0060] It can be understood that when the electric hammer enters the low temperature starting current limiting mode, the current of the electric hammer has been limited at this time. When the electric hammer has been started at low temperature, the user may not know when or forget to control the electric hammer. Exiting the current-limiting mode will cause the electric hammer to still be in ...

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PUM

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Abstract

The invention provides a control method of an electric hammer. The control method comprises the steps that whether the electric hammer is in a starting state or not is judged; if yes, the starting current of the electric hammer and the commutation step number of the motor are obtained; whether the starting current is greater than a low-temperature starting current threshold value or not and whether the commutation step number of the motor is smaller than a commutation step number threshold value or not are judged; if yes, the electric hammer is controlled to enter a low-temperature starting current limiting mode, and the electric hammer is started through an current limited by the low-temperature starting current limiting mode. The invention further provides the electric hammer. According to the control method, the electric hammer is started by using the current limited by the low-temperature current limiting mode, so that the purpose of reducing the starting current of the electric hammer is achieved, the situation that the starting current of the electric hammer is too large, so that a controller of the electric hammer enters overcurrent protection, and starting of the electric hammer fails is prevented, and the problem that the low-temperature starting of the electric hammer fails is effectively solved.

Description

technical field [0001] The invention relates to the technical field of electromechanical equipment, in particular to an electric hammer and a control method thereof. Background technique [0002] The electric hammer is a widely used electric construction tool. On the basis of the electric drill, a piston with a crankshaft connecting rod driven by an electric motor is added, and the air is reciprocally compressed in a cylinder, so that the air pressure in the cylinder changes periodically. The changing air pressure drives the hammer in the cylinder to hit the top of the drill bit back and forth, which is equivalent to hitting the drill bit with a hammer, so it is called an electric hammer. [0003] As a type of electric drill, the electric hammer is widely used for fast reciprocating motion along the direction of the drill bit while the drill bit is rotating. Punch. [0004] However, the use environment of the electric hammer is easily affected by the ambient temperature. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D11/00B25D17/00H02P1/16H02P23/14
CPCB25D11/00B25D17/00H02P1/16H02P23/14
Inventor 何柱铭
Owner HUIZHOU TOPBAND ELECTRICAL TECH CO LTD