CN109782643B - Control method for starting heat engine of electric tool - Google Patents
Control method for starting heat engine of electric tool Download PDFInfo
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- CN109782643B CN109782643B CN201910183251.0A CN201910183251A CN109782643B CN 109782643 B CN109782643 B CN 109782643B CN 201910183251 A CN201910183251 A CN 201910183251A CN 109782643 B CN109782643 B CN 109782643B
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Abstract
The invention provides a control method for starting a heat engine by an electric tool, which comprises a starting switch and a starting state zone bit B, wherein the starting rotating speed/power is divided into a plurality of conditions, the rotating speed/power which is adopted for starting is judged by the number of times that the starting switch is pressed and the numerical value of the starting state zone bit B, and the starting rotating speed/power is tried from large to small in sequence until the electric tool can be normally started to run, so that the effect of starting the heat engine is realized.
Description
Technical Field
The invention relates to the technical field of electric tools, in particular to a method for controlling a starting heat engine of an electric tool, which is suitable for electric tools of assembly type, cutting type and grinding type, and comprises the following steps: electric saws, drills, angle grinders, and the like.
Background
The battery pack has various specifications, the capacity is small or large, and the discharge capacities of the battery packs with different capacities are different. The discharge capacity of the same battery pack under different environments is different. The same power tool may also result in different current capabilities due to the mechanical structure and the environmental impact of grease. Therefore, when the electric tool or the battery pack is influenced by environmental factors, the electric tool can normally run only by needing more current, the discharge capacity of the battery pack is reduced, and the problem can be solved only by temperature rise, a heat engine function needs to be executed, and the normal starting of the electric tool is ensured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defect that the electric tool cannot be normally started in the prior art, the invention provides a control method for a starting heat engine of the electric tool.
The technical scheme adopted for solving the technical problems is as follows: a control method for starting heat engine of electric tool includes starting switch and starting state flag bit B, where the switch of electric tool is similar to trigger and is started by pinching it down by hand, and after it is released, the switch rebounds to original position by itself to make the switch short-circuit. Without holding the switch, the power tool cannot operate, and is therefore defined as follows: continuously pressing the starting switch, enabling the electric tool to be in a running state, loosening the starting switch, and stopping running of the electric tool;
the initial value of the start state flag bit B is set to N0；
When the starting state flag bit B is equal to N1At full speed V1Starting;
when the starting state flag bit B is equal to N2When the motor rotates at a rotating speed V for the first time2Starting;
when the starting state flag bit B is equal to N3When the motor rotates at a rotating speed V for the first time2If the starting is successful, the starting switch is actively loosened;
when the starting state flag bit B is equal to N4Then the motor again rotates at the speed V2Starting;
when the starting state flag bit B is equal to N5At a rotational speed V of the motor3Starting;
wherein, V1The maximum speed at which the motor is started; v3Is the minimum speed at which the motor starts, and V3＜V2＜V1，N0、N1、N2、N3、N4And N5Are different values. In addition, the maximum speed V1So that the minimum speed V can be determined by the maximum output power of the motor3The minimum speed of different batches or different brands of motors can be set more as required according to the actual performance of the motor adopted by the electric tool. V2The value of (b) is between the above two values, and can be set according to specific situations.
Further comprising the steps of:
s1: pressing a starting switch to start the electric tool, and judging whether the value of a starting state flag bit B is an initial value N0If the value of the start-up status flag bit B is the initial value N0Then, go to step S2;
if the value of the start state flag bit B is not the initial value N0Then, go to step S3;
s2: setting the value of the start status flag bit B to N1At this time, the motor is at full speed V1Starting, if the total running time T of the motor is larger than the motor starting time threshold T, judging that the electric tool is normally started, entering a normal running state, setting the value of a starting state flag bit B as an initial value, and entering the step S6; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N1If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S3;
s3: judging whether the value of the starting state flag bit B is N1If the starting state isFlag bit B has a value of N1Then the value of the start status flag bit B is set to N2At a rotational speed V of the motor2Starting, if the motor can be started normally, setting the value of the starting state flag bit B to be N3And actively releasing the starting switch, then pressing the starting switch again to start the electric tool, and proceeding to step S4; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N2If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S5; if the value of the start status flag bit B is not N1Then, the process proceeds to step S5.
The method for judging whether the motor can be normally started in this step is similar to that in step S2, because if the mechanical structure is not hot enough, the load is large and can be detected in a short time, the total restart operation time T1 > the motor restart time threshold T1 is recorded, the value of the motor restart time threshold T1 may be the same as or may be set to a different value from the first motor start time threshold T in step S2, and may be set according to the performance of a specific electric tool, and the subsequent judgment criteria are the same, which is not described in detail.
S4: judging whether the value of the starting state flag bit B is N3If the value of the start status flag bit B is N3Then the value of the start status flag bit B is set to N4While the motor is again rotating at speed V2Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
s5: judging the value of the starting state flag bit B to be N2If the value of the start status flag bit B is N2Then the value of the start status flag bit B is set to N5Then the motor rotates at a rotating speed V3Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
if the value of the start status flag bit B is not N2Then, go to step S4;
s6: and (4) running at the current speed until the work is finished, and when the work is finished, loosening the starting switch and stopping running.
Because the motor rotating speed and the output power of the motor are in a direct proportion relation, the higher the rotating speed is, the higher the output power is. When the temperature is too low, the mechanical part causes additional loss to be raised, and if the power output is ensured to be the same as that in the normal work, the sum of the two exceeds the output capacity of the battery pack, and the battery pack is protected and powered off. The machine cannot be used normally. Therefore, the motor speed in the above method may be replaced by power, and the power is used as a starting control parameter, and the control method is expressed as follows:
a control method for starting a heat engine of an electric tool comprises a starting switch and a starting state flag bit B, and the following definitions are as follows:
continuously pressing the starting switch, enabling the electric tool to be in a running state, loosening the starting switch, and stopping running of the electric tool;
the initial value of the start state flag bit B is set to N0；
When the starting state flag bit B is equal to N1At full power P1Starting;
when the starting state flag bit B is equal to N2At first, the motor is powered by P2Starting;
when the starting state flag bit B is equal to N3At first, the motor is powered by P2If the starting is successful, the starting switch is actively loosened;
when the starting state flag bit B is equal to N4Then the motor is again at power P2Starting;
when the starting state flag bit B is equal to N5At power P3Starting;
wherein, P1The maximum power output for the motor; p3Is the minimum power output of the motor, and P3＜P2＜P1，N1、N2、N3、N4And N5Are different values;
further comprising the steps of:
s1: pressing a starting switch to start the electric tool, and judging whether the value of a starting state flag bit B is an initial value N0If the value of the start-up status flag bit B is the initial value N0Then, go to step S2;
if the value of the start state flag bit B is not the initial value N0Then, go to step S3;
s2: setting the value of the start status flag bit B to N1At this time, the motor is at full power P1Starting, if the total running time T of the motor is larger than the motor starting time threshold T, judging that the electric tool is normally started, entering a normal running state, setting the value of a starting state flag bit B as an initial value, and entering the step S6; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N1If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S3;
s3: judging whether the value of the starting state flag bit B is N1If the value of the start status flag bit B is N1Then the value of the start status flag bit B is set to N2Electric machine with power P2Starting, if the motor can be started normally, setting the value of the starting state flag bit B to be N3And actively releasing the starting switch, then pressing the starting switch again to start the electric tool, and proceeding to step S4; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N2If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S5;
if the value of the start status flag bit B is not N1Then, go to step S5;
s4: judging whether the value of the starting state flag bit B is N3If the value of the start status flag bit B is N3Then the value of the start status flag bit B is set to N4While the motor is again at power P2Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
s5: judging the value of the starting state flag bit B to be N2If the value of the start status flag bit B is N2Then the status flag B will be activatedSet to a value of N5The motor is powered by P3Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
if the value of the start status flag bit B is not N2Then, go to step S4;
s6: and (4) running at the current speed until the work is finished, and when the work is finished, loosening the starting switch and stopping running.
The invention has the beneficial effects that: the invention provides a control method for starting a heat engine of an electric tool, which divides the starting rotating speed/power of the electric tool into several conditions, judges which rotating speed/power is adopted for starting according to the number of times of pressing a starting switch and the value of a starting state zone bit B, and sequentially tries the starting rotating speed/power from large to small until the electric tool can be normally started and operated, thereby realizing the function of starting the heat engine.
Detailed Description
In the present embodiment, the control method is specifically described by using the rotation speed, preferably, V1At full speed, V2＝70％V1，V3＝50％V1The setting of the value B of the start status flag bit can be implemented in various ways, such as addition counting, subtraction counting, and direct assignment. And setting N0＝0，N1＝N0+1＝1，N2＝N1+1＝2，N3＝10，N4＝N3+1＝11，N5＝N2+1＝3。
After the normal use of the electric tool is completed each time, the value of the start status flag B is set as an initial value, which is N in this embodiment0Is 0 and therefore, a clear indication is used, so if the start switch is pressed for the first time, the value of the start status flag B should be 0,therefore, whether the start switch is pressed for the first time can be determined by determining the value of the start state flag B.
The method specifically comprises the following steps:
s1: pressing a starting switch to start the electric tool, judging whether the value of a starting state zone bit B is 0, if the value of the starting state zone bit B is 0, pressing the starting switch for the first time, and correspondingly entering a step S2;
if the value of the start status flag B is not 0, it indicates that the start switch is not pressed for the first time, and the process proceeds to step S3;
s2: after the start switch is pressed for the first time, the value of the start state flag bit B is added with 1, at the moment, B is 1, the motor is started at 100% speed, namely full speed V1And starting, if the total running time T of the motor is greater than the motor starting time threshold T, and in this embodiment, preferably, the motor starting time threshold T is 3.5S, determining that the electric tool is normally started, entering a normal running state, simultaneously resetting the value of the starting state flag bit B, running at the current speed until the work is completed, and when the work is completed, releasing the starting switch, stopping running, and waiting for the next use.
After the normal operation is carried out for 3.5 seconds after the normal start, the power failure condition still does not occur, the current external environment is considered to be in accordance with the normal working state, and the flag bit is set to the normal state no matter the time is up or the switch is loosened.
Otherwise, it is determined that the electric tool has failed to be started, the value of the start status flag B is maintained, the start switch is released, the start switch is pressed again to start the electric tool, and the process proceeds to step S3.
S3: and (3) judging whether the value of the starting state flag bit B is 1 or not firstly because the full-speed starting is unsuccessful and the value of the starting state flag bit B is not changed after the starting switch is released, and pressing the starting switch again if the value of the starting state flag bit B is 1, wherein the full-speed starting is unsuccessful. At this time, the value of the start state flag bit B is added with 1, that is, B is 2, and the motor rotates at the rotating speed V2Starting, if the motor can be started normally, setting the value of the starting state flag bit B to 10, actively releasing the starting switch, and thenPressing the start switch again starts the electric tool, and proceeds to step S4; otherwise, judging that the electric tool fails to start, keeping the value of the starting state zone bit B unchanged at 2, loosening the starting switch, pressing the starting switch again to start the electric tool, and entering the step S5;
if the value of the start status flag bit B is not N1Then, go to step S5;
s4: judging whether the value of the starting state flag bit B is 10 or not, if the value of the starting state flag bit B is 10, adding 1 to the value of the starting state flag bit B, namely B equals 11, and at the moment, the motor rotates at the rotating speed V again2Namely starting at 70% speed, entering a normal running state unconditionally, resetting the value of the starting state flag bit B, running at the current speed until the work is finished, and when the work is finished, loosening the starting switch, stopping running and waiting for the next use.
S5: judging whether the value of the starting state flag bit B is 2 or not, if the value of the starting state flag bit B is 2, setting the value of the starting state flag bit B to be 3, and enabling the motor to rotate at the rotating speed V3Starting, namely starting at 50% speed, entering a normal running state unconditionally, resetting the value of the starting state flag bit B, running at the current speed until the work is finished, and when the work is finished, loosening the starting switch, stopping running and waiting for the next use.
If the value of the enable status flag B is not 3, the process proceeds to step S4, and it is determined whether the value of the enable status flag B is 10.
In the embodiment, the judgment sequence of the value B of the starting state flag bit is 0-1-2-3-10, namely, initial, full speed, 70% speed and 50% speed, if the value B is the value, the corresponding processing process is correspondingly entered, and the control method can automatically identify whether the starting switch is pressed for the first time or not by judging the value B of the starting state flag bit, so that additional judgment is not needed, and the control process is simplified.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (2)
1. A control method for starting a heat engine of an electric tool is characterized by comprising the following steps: the starting switch and the starting state flag bit B are included, and the following definitions are provided:
continuously pressing the starting switch, enabling the electric tool to be in a running state, loosening the starting switch, and stopping running of the electric tool;
the initial value of the start state flag bit B is set to N0；
When the electric tool is normally started, and the starting state flag bit B is equal to N1At full speed V1Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N2When the motor rotates at a rotating speed V for the first time2Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N3When the motor rotates at a rotating speed V for the first time2If the starting is successful, the starting switch is actively loosened;
when the electric tool is normally started, and the starting state flag bit B is equal to N4Then the motor again rotates at the speed V2Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N5At a rotational speed V of the motor3Starting;
wherein, V3＜V2＜V1，N0、N1、N2、N3、N4And N5Are different values;
further comprising the steps of:
s1: pressing a starting switch to start the electric tool, and judging whether the value of a starting state flag bit B is an initial value N0If the value of the start-up status flag bit B is the initial value N0Then, go to step S2;
if the value of the start state flag bit B is not the initial value N0Then, go to step S3;
s2: setting the value of the start status flag bit B to N1At this time, electricity is suppliedMachine at full speed V1Starting, if the total running time T of the motor is larger than the motor starting time threshold T, judging that the electric tool is normally started, entering a normal running state, setting the value of a starting state flag bit B as an initial value, and entering the step S6; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N1If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S3;
s3: judging whether the value of the starting state flag bit B is N1If the value of the start status flag bit B is N1Then the value of the start status flag bit B is set to N2At a rotational speed V of the motor2Starting, if the motor can be started normally, setting the value of the starting state flag bit B to be N3And actively releasing the starting switch, then pressing the starting switch again to start the electric tool, and proceeding to step S4; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N2If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S5;
if the value of the start status flag bit B is not N1Then, go to step S5;
s4: judging whether the value of the starting state flag bit B is N3If the value of the start status flag bit B is N3Then the value of the start status flag bit B is set to N4While the motor is again rotating at speed V2Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
s5: judging the value of the starting state flag bit B to be N2If the value of the start status flag bit B is N2Then the value of the start status flag bit B is set to N5Then the motor rotates at a rotating speed V3Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
if the value of the start status flag bit B is not N2Then, go to step S4;
s6: and (4) running at the current speed until the work is finished, and when the work is finished, loosening the starting switch and stopping running.
2. A control method for starting a heat engine of an electric tool is characterized by comprising the following steps: the starting switch and the starting state flag bit B are included, and the following definitions are provided:
continuously pressing the starting switch, enabling the electric tool to be in a running state, loosening the starting switch, and stopping running of the electric tool;
the initial value of the start state flag bit B is set to N0；
When the electric tool is normally started, and the starting state flag bit B is equal to N1At full power P1Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N2At first, the motor is powered by P2Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N3At first, the motor is powered by P2If the starting is successful, the starting switch is actively loosened;
when the electric tool is normally started, and the starting state flag bit B is equal to N4Then the motor is again at power P2Starting;
when the electric tool is normally started, and the starting state flag bit B is equal to N5At power P3Starting;
wherein, P3＜P2＜P1，N1、N2、N3、N4And N5Are different values;
further comprising the steps of:
s1: pressing a starting switch to start the electric tool, and judging whether the value of a starting state flag bit B is an initial value N0If the value of the start-up status flag bit B is the initial value N0Then, go to step S2;
if the value of the start state flag bit B is not the initial value N0Then, go to step S3;
s2: setting the value of the start status flag bit B to N1At this time, the motor is at full power P1Starting, if the total running time T of the motor is larger than the motor starting time threshold T, judging that the electric tool is normally started, entering a normal running state, setting the value of a starting state flag bit B as an initial value, and entering the step S6; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N1If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S3;
s3: judging whether the value of the starting state flag bit B is N1If the value of the start status flag bit B is N1Then the value of the start status flag bit B is set to N2Electric machine with power P2Starting, if the motor can be started normally, setting the value of the starting state flag bit B to be N3And actively releasing the starting switch, then pressing the starting switch again to start the electric tool, and proceeding to step S4; otherwise, judging that the electric tool fails to start, and keeping the value of the starting state flag bit B as N2If not, the start switch is released, and the start switch is pressed again to start the electric tool, and the process proceeds to step S5;
if the value of the start status flag bit B is not N1Then, go to step S5;
s4: judging whether the value of the starting state flag bit B is N3If the value of the start status flag bit B is N3Then the value of the start status flag bit B is set to N4While the motor is again at power P2Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
s5: judging the value of the starting state flag bit B to be N2If the value of the start status flag bit B is N2Then the value of the start status flag bit B is set to N5The motor is powered by P3Starting, entering a normal running state unconditionally, setting the value of a starting state flag bit B as an initial value, and entering step S6;
if the value of the start status flag bit B is not N2Then, go to step S4;
s6: and (4) running at the current speed until the work is finished, and when the work is finished, loosening the starting switch and stopping running.
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| CN104981325B (en) * | 2013-03-30 | 2018-08-31 | 日立工机株式会社 | Electric tool |
| DE102014211891A1 (en) * | 2014-06-20 | 2015-12-24 | Robert Bosch Gmbh | Method for operating a power tool |
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Address after: Room 8-01, Guozhan electromechanical Industrial Park, 538 Hehai West Road, Xinbei District, Changzhou City, Jiangsu Province Applicant after: Changzhou Toolon Electric Works Co.,Ltd. Applicant after: HANGZHOU SLEDUCE TECHNOLOGY Co.,Ltd. Address before: 213023 No. 178-1 Yulong South Road, Zhonglou Economic Development Zone, Changzhou City, Jiangsu Province Applicant before: Changzhou Toolon Electric Works Co.,Ltd. Applicant before: HANGZHOU SLEDUCE TECHNOLOGY Co.,Ltd. |
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