CN114193402B - Control method of electric impact tool - Google Patents
Control method of electric impact tool Download PDFInfo
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- CN114193402B CN114193402B CN202111645771.2A CN202111645771A CN114193402B CN 114193402 B CN114193402 B CN 114193402B CN 202111645771 A CN202111645771 A CN 202111645771A CN 114193402 B CN114193402 B CN 114193402B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002159 abnormal effect Effects 0.000 claims abstract description 147
- 238000011084 recovery Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- -1 floor slabs Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a control method of an electric impact tool, which comprises the following steps: and reading the abnormal event zone bit, judging abnormal event occurrence information according to the abnormal event zone bit, and setting working parameters of the electric impact tool based on the abnormal event occurrence information. According to the invention, the working parameters of the electric impact tool are adjusted by marking the abnormal event of the electric impact tool in the using process, so that the problem of frequent start failure of the electric impact tool is effectively solved.
Description
Technical Field
The present invention relates to a control method for an electric power tool, and more particularly, to a control method for an electric impact tool.
Background
With the wide application of electric tools, different kinds of electric tools have different problems facing different application conditions and need to be solved. Electric impact tools (e.g., electric hammers, picks, etc.) are mainly used for drilling holes in concrete, floor slabs, brick walls, and slates, or for demolishing concrete structures, and are susceptible to environmental temperatures and heavy load conditions. When the ambient temperature is too low, grease used for lubrication inside the electric impact tool can be frozen, the discharging capacity of the battery pack is greatly reduced in a low-temperature environment, the resistance of the motor is increased, the starting current during starting is increased, and the controller enters overcurrent protection or low-voltage protection to cause starting failure. Because the working environment of the electric tool is mostly reinforced concrete, when the electric tool is used, a hammer head is blocked in a cement block to start, and the electric tool is started under the heavy load working condition, the starting current is also very large, so that the controller enters overcurrent protection or low-voltage protection, and further the starting fails. In order to solve the problems, the electric impact tools on the market basically only use multi-stage overcurrent protection to process or use a thermistor to detect the temperature, but the problem of frequent start failure cannot be solved.
In addition, when the ambient temperature is too high or the electric impact tool is operated with a large current for a long time, the battery pack or the power element controlling the motor is easily overheated and overheated, so that the overheat protection occurs. The method commonly used in the market at present is to detect the temperature of a battery pack or a power element through a thermistor, wherein the detected temperature is higher than a set threshold value and enters over-temperature protection, and the temperature is slightly reduced and can be restarted. When the operation is repeated, the temperature is continuously accumulated and rises sharply, the battery pack or the power element can drop sharply along with the temperature rise, and therefore the damage or failure of components is caused, and the battery pack is possibly at risk of ignition.
Disclosure of Invention
In order to solve the above problems, the present invention provides a control method of an electric impact tool, which specifically comprises the following steps:
a control method of an electric impact tool, comprising: and reading the abnormal event zone bit, judging abnormal event occurrence information according to the abnormal event zone bit, and setting working parameters of the electric impact tool based on the abnormal event occurrence information.
Further, judging the abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit; when the abnormal event zone bit is a first value, the working parameter is set to be in a first working state, and when the abnormal event zone bit is a second value, the working parameter is set to be in a second working state.
Further, when the abnormal event flag bit is not assigned and an abnormal event occurs when the electric impact tool works, the abnormal event flag bit is assigned to be a first value.
Further, when the abnormal event flag bit is a first value and an abnormal event occurs when the electric impact tool works, the abnormal event flag bit is assigned to be a second value.
Further, when the abnormal event flag bit is a first value and no abnormal event occurs during the operation of the electric impact tool, the value of the abnormal event flag bit is cleared.
Further, when the abnormal event flag bit is not assigned, setting the working parameter of the electric impact tool to be a third working state.
In another embodiment, the abnormal event is a start failure, and the operating parameter of the power impact tool is set to the set operating speed.
Further, judging the abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit; when the abnormal event zone bit is a first value, setting the working rotation speed of the electric impact tool as a first rotation speed, and when the abnormal event zone bit is a second value, setting the working rotation speed of the electric impact tool as a second rotation speed, wherein the first rotation speed is larger than the second rotation speed.
Further, when the abnormal event zone bit is not assigned and the electric impact tool fails to start, assigning the abnormal event zone bit to be 1; when the abnormal event flag bit is 1 and the electric impact tool fails to start, the abnormal event flag bit is assigned to be 2.
Further, when the abnormal event flag bit is 1, and the electric impact tool is started successfully, the value of the abnormal event flag bit is cleared.
Further, when the abnormal event flag bit is 1, and the electric impact tool is started successfully at least twice continuously, the value of the abnormal event flag bit is cleared.
Further, when the abnormal event flag bit is 2, the value of the abnormal event flag bit is cleared when the electric impact tool is started to work.
Further, when the abnormal event flag bit is not assigned, setting the working rotation speed of the electric impact tool to be a third rotation speed, wherein the third rotation speed is larger than the first rotation speed.
Further, it is detected whether the power impact tool fails to start within a first preset time of operation after the power impact tool starts.
Further, detecting a voltage variation difference of the electric impact tool in a second preset time, and judging that the electric impact tool fails to start when the voltage variation difference is not smaller than a voltage difference threshold.
In another embodiment, the abnormal event is an over-temperature protection, and the operating parameter of the power impact tool is set to set an over-temperature protection threshold.
Further, judging the abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit; when the abnormal event zone bit is a first value, the over-temperature recovery threshold of the electric impact tool is set as a first temperature threshold, and when the abnormal event zone bit is a second value, the over-temperature recovery threshold of the electric impact tool is set as a second temperature threshold, wherein the first temperature threshold is larger than the second temperature threshold.
Further, when the abnormal event flag bit is not assigned, the over-temperature recovery threshold of the electric impact tool is set to be a third temperature threshold, and the third temperature threshold is greater than the first temperature threshold.
Further, when the abnormal event zone bit is not assigned and the over-temperature protection occurs after the electric impact tool is started, the abnormal event zone bit is assigned to be 1; when the abnormal event zone bit is 1 and over-temperature protection occurs after the electric impact tool is started, the abnormal event zone bit is assigned to be 2.
Further, when the abnormal event flag bit is 1 or 2, and the temperature is smaller than the over-temperature protection threshold value after the electric impact tool is started for a third preset time, the numerical value of the abnormal event flag bit is cleared.
Further, the electric impact tool has a motor and a power switching element that drives the motor, and the overheat protection is an overheat protection of the power switching element.
In another embodiment, a power impact tool has a motor and a power module for providing power to the motor, and over-temperature protection is over-temperature protection of the power module.
In another embodiment, a power impact tool includes: the power module is used for providing electric energy; the control unit is used for controlling the electric impact tool to work; the motor is connected with the power supply module; the three-phase inversion control module is used for controlling the operation of the motor based on the signal of the control unit; the voltage detection module is used for detecting the voltage of the power supply module and outputting a voltage signal to the control unit, the current detection module is used for detecting the working current of the motor and outputting a current signal to the control unit, and the control unit judges whether an abnormal event occurs or not based on one or more of the voltage signal or the current signal.
In another embodiment, a power impact tool includes: the power module is used for providing electric energy; the control unit is used for controlling the electric impact tool to work; the motor is connected with the power supply module; the three-phase inversion control module is used for controlling the operation of the motor based on the signal of the control unit; the temperature detection module is used for detecting the temperature of the three-phase inversion control module and outputting a temperature signal to the control unit, and the control unit judges whether an abnormal event occurs or not based on the temperature signal.
In another embodiment, a power impact tool includes: the power module is used for providing electric energy; the control unit is used for controlling the electric impact tool to work; the motor is connected with the power supply module; the three-phase inversion control module is used for controlling the operation of the motor based on the signal of the control unit; the temperature detection module is used for detecting the temperature of the power supply module and outputting a temperature signal to the control unit, and the control unit judges whether an abnormal event occurs or not based on the temperature signal.
According to the invention, the working parameters of the electric impact tool are adjusted by marking the abnormal event of the electric impact tool in the using process, so that the problem of frequent start failure of the electric impact tool is effectively solved. Further, if the abnormal event in the use of the electric impact tool is a start failure, the working rotation speed of the electric impact tool is adjusted, so that the problem of frequent start failure caused by low-temperature start or locked rotation is avoided. In addition, the over-temperature recovery threshold value is adjusted according to the over-temperature protection occurrence condition in the use process of the electric impact tool, so that the damage or failure caused by the temperature superposition of the battery pack or the power element of the control motor is avoided.
Drawings
The invention is further described and illustrated below with reference to the accompanying drawings.
FIG. 1 is a schematic flow chart of an embodiment of the present invention.
FIG. 2 is a schematic flow chart of another embodiment of the present invention.
FIG. 3 is a schematic flow chart of another embodiment of the present invention.
Fig. 4 is a schematic circuit block diagram of another embodiment of the present invention.
Reference numerals:
11. a power module; 12. a control unit; 13. a three-phase inversion control module; 14. a motor; 15. a current detection module; 16. a voltage detection module; 17. a temperature detection module; 18. and a position detection module.
Detailed Description
The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, a method for controlling an electric impact tool according to an embodiment includes: and reading the abnormal event zone bit, judging abnormal event occurrence information according to the abnormal event zone bit, and setting working parameters of the electric impact tool based on the abnormal event occurrence information. The abnormal event in the using process of the electric impact tool is marked, the working parameters of the electric impact tool are adjusted, the problem that the electric impact tool is frequently started to fail is effectively solved, or the temperature of a battery pack or a power element of a control motor is prevented from being increased, so that the electric impact tool is damaged or failed.
Further, the judgment of the abnormal event occurrence information in the present embodiment includes: judging the assignment of the abnormal event flag bit; when the abnormal event flag bit is a first numerical value, setting the working parameter as a first working state; when the abnormal event flag bit is a second value, setting the working parameter to be a second working state; and when the abnormal event flag bit is not assigned, setting the working parameter of the electric impact tool to be a third working state.
Further, in the embodiment, when the abnormal event flag bit is not assigned and an abnormal event occurs when the electric impact tool works, the abnormal event flag bit is assigned to be a first value; when the abnormal event zone bit is a first value and an abnormal event occurs during the working of the electric impact tool, the abnormal event zone bit is assigned to be a second value; and when the abnormal event zone bit is a first value and no abnormal event occurs during the working of the electric impact tool, the value of the abnormal event zone bit is cleared. In the above embodiment, the abnormal event flag bit is used to record the occurrence frequency or the number of times of the abnormal event, and may be stored in the Flash storage space of the Micro Control Unit (MCU), may be stored in other modules known in the prior art, or may be stored in other devices except the micro control unit, which is not limited herein. The assignment is written into the abnormal event flag bit by a corresponding value, and the form of the value is not limited, and can be a binary value, a decimal value or other known value forms in the prior art, and the value is not limited.
According to the control method of the electric impact tool shown in fig. 1, when the electric impact tool is started each time, abnormal event zone bit information is read, abnormal event zone bit assignment is judged, the working state of the electric impact tool is set based on the abnormal event zone bit assignment, the problem that the electric impact tool is frequently started and fails is effectively solved, or the temperature of a battery pack or a power element for controlling a motor is prevented from rising, so that the electric impact tool is damaged or failed. In other optional embodiments, the abnormal event flag bit information may be read and the abnormal event flag bit assignment may be determined when the electric impact tool is stopped each time, the working state of the electric impact tool may be set based on the abnormal event flag bit assignment, and the electric impact tool may directly work in the set working state when starting next time.
In another embodiment, as shown in fig. 2, the abnormal event is a start failure, and the operating parameter of the electric impact tool is set to the operating rotational speed. The start failure may be that the voltage value of the electric impact tool drops beyond a set threshold value within a preset time period, or that the electric impact tool enters any one of overcurrent protection and low-voltage protection. The electric impact tool is generally provided with lubricating grease inside, when working in a low-temperature environment, the internal lubricating grease is frozen, the friction resistance which needs to be overcome by the movement of a transmission part inside the tool is increased, meanwhile, the discharging capacity of a battery pack in the low-temperature environment is greatly reduced, the condition that high current starts to immediately enter low-voltage protection is easy to occur, in other non-low-temperature environments, the electric impact tool is generally used for mixing soil, floors, brick walls and stone plates to drill holes or is used for dismantling concrete buildings, the electric impact tool is easy to clamp in cement or the buildings, the electric impact tool also enters overcurrent protection or the voltage drops sharply in a preset time period, and the user experience is that the electric impact tool stops working in a short time after being started, namely the electric impact tool is started fails. The electric power tool is not limited to the above situation, and the electric power tool enters overcurrent protection or low-voltage protection or the voltage drops sharply in a preset time period, the state of the electric impact tool is not adjusted, and the user is started again or fails to start, and the situation that the electric power tool fails to start frequently occurs. In order to avoid frequent start failure of the electric impact tool, in this embodiment, the rotation speed of the electric impact tool is adjusted based on the number or frequency of start failure, so as to avoid start failure caused by the above situation.
In the present embodiment, further judging the abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit; when the abnormal event zone bit is a first value, setting the working rotation speed of the electric impact tool as a first rotation speed, and when the abnormal event zone bit is a second value, setting the working rotation speed of the electric impact tool as a second rotation speed, wherein the first rotation speed is larger than the second rotation speed. When the abnormal event flag bit is not assigned, setting the working rotation speed of the electric impact tool as a third rotation speed, wherein the third rotation speed is larger than the first rotation speed.
In this embodiment, further, when the abnormal event flag bit is not assigned and the electric impact tool fails to start, the abnormal event flag bit is assigned to be 1; when the abnormal event flag bit is 1 and the electric impact tool fails to start, the abnormal event flag bit is assigned to be 2.
Specifically, when the abnormal event flag bit is not assigned, that is, when no starting failure occurs in the last starting and using process of the electric impact tool, setting the working rotation speed of the electric impact tool to be 100%, that is, normally starting; when the abnormal event flag bit is 1, that is, the starting failure occurs in the starting and using process of the electric impact tool last time, the working rotating speed of the electric impact tool is set to be 70%, the starting rotating speed is reduced, if the starting failure is caused by low temperature, the inside of the tool or a battery pack can be preheated by the reduced rotating speed starting, and if the starting failure is caused by locked rotation, the output torque of the tool can be increased by the reduced rotating speed, so that the locked rotation problem is solved; when the abnormal event flag bit is 2, that is, the situation that the starting failure occurs in the starting and using processes of the two previous electric impact tools, the working rotating speed of the electric impact tools is set to be 50%, that is, the rotating speed is further reduced to preheat the inside of the tools or further increase the output torque, so that the problem of the starting failure is solved. In this embodiment, the operation speed of the electric impact tool is adjusted by adjusting the operation voltage of the motor, and one possible way is to adjust the duty ratio of the operation voltage of the motor of the electric impact tool, that is, to set the operation voltage of the motor to be a square wave with a duty ratio of 100% when the operation speed of the electric impact tool is set to be 100%, to set the operation speed of the electric impact tool to be 70%, to set the operation voltage of the motor to be a square wave with a duty ratio of 70%, and to set the operation speed of the electric impact tool to be 50%, to set the operation voltage of the motor to be a square wave with a duty ratio of 50%. In other alternative embodiments, the operation voltage of the motor may be adjusted by a step-down element, or other realizable manners known in the art, which are not described herein in detail.
In a preferred embodiment, when the abnormal event flag is 1 and the power impact tool is started successfully, the value of the abnormal event flag is cleared. The electric impact tool can be controlled to work normally when the electric impact tool is started next time after the rotation speed of the electric impact tool is reduced, whether the electric impact tool is started in a low-temperature environment or in a locked-rotor environment.
Of course, in another preferred embodiment, when the abnormal event flag is 1, and the electric impact tool is started successfully at least twice consecutively, the value of the abnormal event flag may be cleared. When the starting failure caused by the low-temperature environment occurs, the electric impact tool can be effectively preheated to the normal working temperature range by operating under the control method, and if the starting failure caused by the locked-rotor occurs, the incomplete release of the locked-rotor of the electric impact tool can be effectively avoided.
In another preferred embodiment, when the abnormal event flag is 2, the value of the abnormal event flag is cleared when the power impact tool is started to operate. The rotation speed of the electric impact tool is reduced to a certain degree, and the problem that the rotation speed is not further reduced or the electric impact tool runs at a low speed is solved.
In another preferred embodiment, it is detected whether the power impact tool fails to start within a first preset time of operation after the power impact tool starts. Specifically, when the electric impact tool is started, whether the electric impact tool has a start failure is detected only within 3.5S, that is, after the time is exceeded, the abnormal event flag bit is not updated as an abnormal event even if the electric impact tool enters the overcurrent protection or the low-voltage protection. In this embodiment, how long the first preset time is depends on the discharging capability of the battery pack and the operating parameters of the motor, that is, when the electric impact tool is normally operated continuously for a certain period of time, it is considered that the low voltage protection is normal, and therefore the first preset time is not specifically limited herein.
In another preferred embodiment, the voltage variation difference of the electric impact tool in the second set time is detected, and when the voltage variation difference is not smaller than the voltage difference threshold, the start failure of the electric impact tool is judged. Specifically, the motor operating voltage is cyclically detected during the operation of the electric impact tool, and the variation difference of the motor operating voltage within 30ms is calculated, and once the variation difference is greater than 10V, the electric impact tool is considered to be failed to start. In other alternative embodiments, how the second preset time specific setting and the threshold of the voltage difference are set depends on the discharging capability of the battery pack and the operating parameters of the motor, which is not limited herein.
In another embodiment, as shown in fig. 3, the abnormal event is over-temperature protection, and the operating parameter of the electric impact tool is set to an over-temperature protection threshold. Therefore, in the electric impact tool, the parts, such as the battery pack, the motor control power element and the like, which are easy to generate heat are prevented from being invalid or damaged due to the fact that the operation temperature is too high.
In the present embodiment, further judging the abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit; when the abnormal event zone bit is a first value, the over-temperature recovery threshold of the electric impact tool is set as a first temperature threshold, and when the abnormal event zone bit is a second value, the over-temperature recovery threshold of the electric impact tool is set as a second temperature threshold, wherein the first temperature threshold is larger than the second temperature threshold.
In this embodiment, further, when the abnormal event flag bit is not assigned, the over-temperature recovery threshold of the electric impact tool is set to a third temperature threshold, and the third temperature threshold is greater than the first temperature threshold.
In the embodiment, further, when the abnormal event flag bit is not assigned and the over-temperature protection occurs after the electric impact tool is started, the abnormal event flag bit is assigned to be 1; when the abnormal event zone bit is 1 and over-temperature protection occurs after the electric impact tool is started, the abnormal event zone bit is assigned to be 2.
Specifically, the over-temperature protection of the electric impact tool is set to be 100 ℃, that is, the electric impact tool enters over-temperature protection when the working temperature reaches 100 ℃, and after the electric impact tool stops working for a period of time, the temperature drops, and the electric impact tool is started again and can work normally. When the abnormal event zone bit is not assigned, namely the electric impact tool does not enter over-temperature protection in the last starting and using process, setting the over-temperature recovery threshold of the electric impact tool to be 90 ℃; when the abnormal event flag bit is 1, namely the electric impact tool enters over-temperature protection in the last starting and using process, setting the over-temperature recovery threshold of the electric impact tool to be 80 ℃; when the abnormal event flag bit is 2, that is, the electric impact tool enters over-temperature protection in the two previous use processes, the over-temperature recovery threshold of the electric impact tool is set to be 65. Therefore, the rapid rise of temperature superposition or long-time high-temperature operation can be avoided, and the damage or failure of the battery pack or the power element is easily caused. The above specific values of the over-temperature recovery threshold are only exemplified, but the setting of the actual first temperature threshold, the second temperature threshold, and the third temperature threshold is not limited to the above specific values, and may be set according to actual operation requirements. As shown in fig. 3, after the electric impact tool is started, the abnormal event flag information is read, the abnormal event flag assignment is judged, and the over-temperature recovery threshold is set based on the assignment. In other optional embodiments, the electric impact tool may also read the information of the abnormal event flag bit when the electric impact tool is stopped, determine the assignment of the abnormal event flag bit, set an over-temperature recovery threshold value based on the assignment, and operate according to the set over-temperature recovery threshold value when the electric impact tool is started next time.
In another embodiment, when the abnormal event flag is1 or 2, and the temperature is less than the over-temperature protection threshold value for a third preset time after the electric impact tool is started, the value of the abnormal event flag is cleared. In this embodiment, the third preset time is a relatively long continuous working time, for example, the electric impact tool may be set to operate for 2 minutes at a temperature less than the over-temperature protection threshold, that is, without entering over-temperature protection, to clear the value of the abnormal event flag. The setting of the actual third preset time is not limited to the specific values described above, and may be set according to the actual working parameters of the tool.
Further, the electric impact tool has a motor and a power switching element that drives the motor, and the overheat protection is an overheat protection of the power switching element.
In another embodiment, a power impact tool has a motor and a power module for providing power to the motor, and over-temperature protection is over-temperature protection of the power module.
As shown in fig. 4, in one embodiment, the electric impact tool includes: a power supply module 11 for supplying electric power; a control unit 12 for controlling the operation of the electric impact tool; a motor 14 connected to the power module 11; a three-phase inversion control module 13 for controlling the operation of the motor 14 based on the signal of the control unit; the voltage detection module 16 is configured to detect a voltage of the power supply module 11 and output a voltage signal to the control unit 12, the current detection module 15 is configured to detect an operating current of the motor 14 and output a current signal to the control unit 12, and the control unit 12 determines whether an abnormal event occurs based on one or more of the voltage signal or the current signal.
In another embodiment, a power impact tool includes: a power supply module 11 for supplying electric power; a control unit 12 for controlling the operation of the electric impact tool; a motor 14 connected to the power module 11; a three-phase inversion control module 13 for controlling the operation of the motor 14 based on the signal of the control unit 12; the temperature detection module 17 is configured to detect the temperature of the three-phase inversion control module 13, and output a temperature signal to the control unit 12, where the control unit 12 determines whether an abnormal event occurs based on the temperature signal.
In another embodiment, a power impact tool includes: a power supply module 11 for supplying electric power; a control unit 12 for controlling the operation of the electric impact tool; a motor 14 connected to the power module 11; a three-phase inversion control module 13 for controlling the operation of the motor 14 based on the signal of the control unit 12; a temperature detection module 17 for detecting the temperature of the power module 11 and outputting a temperature signal to the control unit 12, and the control unit 12 determines whether an abnormal event occurs based on the temperature signal.
In the above embodiment, the motor 14 is a brushless motor, and in other alternative embodiments, the motor 14 may be a brushed motor, that is, a three-phase inverter control module is not required to control the operation, and the motor 14 may be a direct current motor or an alternating current motor, which is not limited to the type of the motor 14. The power module 11 is a battery pack, and in other alternative embodiments, other power supply modes known in the art may be used, which is not limited herein. The three-phase inverter control module is mainly a switching power element, such as a MOSFET, an IGBT, etc., but may be other switching power elements known in the art, and is not limited herein.
The above detailed description is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Various modifications, substitutions and improvements of the technical scheme of the present invention will be apparent to those skilled in the art from the description and drawings provided herein without departing from the spirit and scope of the invention. The scope of the invention is defined by the claims.
Claims (7)
1. A method of controlling an electric impact tool, comprising:
Reading an abnormal event zone bit, judging abnormal event occurrence information according to the abnormal event zone bit, and setting working parameters of the electric impact tool based on the abnormal event occurrence information;
The abnormal event is over-temperature protection, and the working parameters of the electric impact tool are set to be over-temperature recovery threshold values;
The judging abnormal event occurrence information includes: judging the assignment of the abnormal event flag bit;
setting an over-temperature recovery threshold of the electric impact tool as a first temperature threshold when the abnormal event flag bit is 1, and setting an over-temperature recovery threshold of the electric impact tool as a second temperature threshold when the abnormal event flag bit is 2, wherein the first temperature threshold is greater than the second temperature threshold;
When the abnormal event flag bit is not assigned, setting an over-temperature recovery threshold of the electric impact tool as a third temperature threshold, wherein the third temperature threshold is larger than the first temperature threshold;
When the abnormal event zone bit is not assigned and the over-temperature protection occurs after the electric impact tool is started, assigning the abnormal event zone bit to be 1;
And when the abnormal event flag bit is 1 and over-temperature protection occurs after the electric impact tool is started, assigning the abnormal event flag bit to be 2.
2. The method of controlling an electric impact tool according to claim 1, characterized by further comprising:
And when the abnormal event zone bit is 1 or 2, and the temperature of the electric impact tool is smaller than the over-temperature protection threshold value after the electric impact tool is started for a third preset time, clearing the numerical value of the abnormal event zone bit.
3. The method for controlling an electric impact tool according to claim 1, wherein,
The electric impact tool is provided with a motor and a power switch element for driving the motor, and the over-temperature protection is that of the power switch element.
4. The method for controlling an electric impact tool according to claim 1, wherein,
The electric impact tool is provided with a motor and a power module for providing electric energy for the motor, and the over-temperature protection is that of the power module.
5. The control method of an electric impact tool according to claim 1, characterized in that the electric impact tool comprises:
the power module is used for providing electric energy;
The control unit is used for controlling the electric impact tool to work;
the motor is connected with the power supply module;
the three-phase inversion control module is used for controlling the motor to run based on the signal of the control unit;
A voltage detection module for detecting the voltage of the power supply module and outputting a voltage signal to the control unit,
A current detection module for detecting the working current of the motor and outputting a current signal to the control unit,
The control unit determines whether an abnormal event occurs based on one or more of the voltage signal or the current signal.
6. The control method of an electric impact tool according to claim 1, characterized in that the electric impact tool comprises:
the power module is used for providing electric energy;
The control unit is used for controlling the electric impact tool to work;
the motor is connected with the power supply module;
the three-phase inversion control module is used for controlling the motor to run based on the signal of the control unit;
The temperature detection module is used for detecting the temperature of the three-phase inversion control module and outputting a temperature signal to the control unit,
The control unit determines whether an abnormal event occurs based on the temperature signal.
7. The control method of an electric impact tool according to claim 1, characterized in that the electric impact tool comprises:
the power module is used for providing electric energy;
The control unit is used for controlling the electric impact tool to work;
the motor is connected with the power supply module;
the three-phase inversion control module is used for controlling the motor to run based on the signal of the control unit;
The temperature detection module is used for detecting the temperature of the power supply module and outputting a temperature signal to the control unit, and the control unit judges whether an abnormal event occurs or not based on the temperature signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645771.2A CN114193402B (en) | 2021-12-30 | 2021-12-30 | Control method of electric impact tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111645771.2A CN114193402B (en) | 2021-12-30 | 2021-12-30 | Control method of electric impact tool |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201248022Y (en) * | 2005-10-12 | 2009-05-27 | 布莱克和戴克公司 | Electric tool with motor control module |
| CN108927772A (en) * | 2017-05-26 | 2018-12-04 | 株式会社牧田 | Electric working machine |
| CN109782643A (en) * | 2019-03-12 | 2019-05-21 | 常州彤扬电气制造有限公司 | A kind of electric tool starting heat engine control method |
| CN110899837A (en) * | 2018-09-18 | 2020-03-24 | 南京德朔实业有限公司 | Electric tool and starting method thereof |
| CN112757230A (en) * | 2020-11-24 | 2021-05-07 | 惠州拓邦电气技术有限公司 | Electric hammer and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6297940B2 (en) * | 2014-01-16 | 2018-03-20 | 株式会社マキタ | Electric machinery / equipment |
| JP6523101B2 (en) * | 2015-08-24 | 2019-05-29 | 株式会社マキタ | Rotary impact tool |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201248022Y (en) * | 2005-10-12 | 2009-05-27 | 布莱克和戴克公司 | Electric tool with motor control module |
| CN108927772A (en) * | 2017-05-26 | 2018-12-04 | 株式会社牧田 | Electric working machine |
| CN110899837A (en) * | 2018-09-18 | 2020-03-24 | 南京德朔实业有限公司 | Electric tool and starting method thereof |
| CN110919600A (en) * | 2018-09-18 | 2020-03-27 | 南京德朔实业有限公司 | Electric tool and starting method thereof |
| CN109782643A (en) * | 2019-03-12 | 2019-05-21 | 常州彤扬电气制造有限公司 | A kind of electric tool starting heat engine control method |
| CN112757230A (en) * | 2020-11-24 | 2021-05-07 | 惠州拓邦电气技术有限公司 | Electric hammer and control method thereof |
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