CN114629382B - Intelligent electric tool and control method thereof - Google Patents
Intelligent electric tool and control method thereof Download PDFInfo
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- CN114629382B CN114629382B CN202011448932.4A CN202011448932A CN114629382B CN 114629382 B CN114629382 B CN 114629382B CN 202011448932 A CN202011448932 A CN 202011448932A CN 114629382 B CN114629382 B CN 114629382B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 230000003116 impacting effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 239000002023 wood Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P4/00—Arrangements specially adapted for regulating or controlling the speed or torque of electric motors that can be connected to two or more different electric power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
Abstract
The embodiment of the invention discloses an intelligent electric tool and a control method thereof. This intelligent electric tool includes: the device comprises an impact element, a motor, a power supply module, a parameter detection unit and a controller, wherein the controller is at least electrically connected with the motor and the parameter detection unit; the controller is configured to: acquiring working parameters of a motor; wherein, the working parameters comprise working current and rotating speed of the motor; and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency to enable the running state of the motor to be in a preset state corresponding to the impact frequency. Can solve among the prior art artificial grasp impact force degree lead to impact effect poor, strike fail in advance, damage mechanical structure scheduling problem through this intelligent electric tool, make impact class electric tool in the course of the work, can guarantee mechanical structure safety when guaranteeing the speed according to the rotational speed of different operating mode automatic control motor, improve work efficiency.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric tool control, in particular to an intelligent electric tool and a control method thereof.
Background
With the development of electric tools, intelligent control technology of the electric tools is increasingly widely used. For example, the screw driver is impacted by the impact wrench, and the controller is used for driving the motor to realize the assembly, disassembly and other works of the fastener.
However, in the working process of the impact wrench impact screw driver, the impact speeds are different under different working conditions, and the striking forces on the impact block are different. Under certain working conditions, the impact strength is high, so that the impact structure fails in advance, and even the safety of the mechanical structure cannot be ensured. However, in the prior art, the impact force of the impact screwdriver is generally grasped by a tool user, so that the impact force is controlled unstably, and the impact force is easy to cause: the impact strength is not enough to strike the effect poorly, and the too big impact strength leads to impact structure to fail in advance, damages mechanical structure scheduling problem even.
Disclosure of Invention
The invention provides an intelligent electric tool and a control method thereof, which are used for realizing that the rotating speed of a motor can be automatically controlled according to different working conditions in the working process of an impact screwdriver of an impact wrench, ensuring the safety of a mechanical structure and improving the working efficiency while ensuring the speed.
In a first aspect, an embodiment of the present invention provides an intelligent electric tool, including:
an impact element;
a motor for driving the impact element to act;
the power supply module is used for supplying power to the motor;
the parameter detection unit is used for detecting the working parameters of the motor; the controller is at least electrically connected with the motor and the current detection unit;
the controller is configured to:
acquiring working parameters of the motor;
and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency so that the running state of the motor is in a preset state corresponding to the impact frequency.
In a second aspect, an embodiment of the present invention further provides a control method of an intelligent electric tool, where the control method of the intelligent electric tool is performed by the intelligent electric tool, and the intelligent electric tool includes an impact element and a motor, where the motor is used to drive the impact element to act; the power supply module is used for supplying power to the motor; the parameter detection unit is used for detecting the working parameters of the motor; the controller is at least electrically connected with the motor and the parameter detection unit;
the control method comprises the following steps:
acquiring working parameters of the motor;
and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency so that the running state of the motor is in a preset state corresponding to the impact frequency.
The present invention provides an intelligent electric tool, comprising: an impact element; a motor for driving the impact element to act; the power supply module is used for supplying power to the motor; the parameter detection unit is used for detecting the working parameters of the motor; the controller is at least electrically connected with the motor and the current detection unit; the controller is configured to: acquiring working parameters of a motor; and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency to enable the running state of the motor to be in a preset state corresponding to the impact frequency. Can solve among the prior art artificial grasp impact force degree lead to impact effect poor, strike fail in advance, damage mechanical structure scheduling problem through this intelligent electric tool, make impact class electric tool in the course of the work, can guarantee mechanical structure safety when guaranteeing the speed according to the rotational speed of different operating mode automatic control motor, improve work efficiency.
Drawings
FIG. 1 is a block diagram of a circuit configuration of an intelligent power tool according to an embodiment of the present invention;
FIG. 2 is a block diagram of a circuit configuration of another intelligent power tool according to an embodiment of the present invention;
FIG. 3 is a graph showing a current variation of a motor in a preset detection period according to an embodiment of the present invention;
FIG. 4 is a block diagram of circuitry of a smart power tool in an embodiment of the invention;
fig. 5 is a flowchart of a method for controlling an intelligent electric tool according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a block diagram of a circuit structure of an intelligent electric tool according to an embodiment of the present invention. Referring to fig. 1, the intelligent power tool includes: an impact element 101; a motor 102 for driving the impact element 101 to act; a power supply module 103 for supplying power to the motor 102; a parameter detection unit 100 for detecting an operation parameter of the motor 102; a controller 106 electrically connected to at least the motor 102 and the parameter detecting unit 100; the controller 106 is configured to: acquiring the working parameters of the motor 102; the impact frequency of the impact element 101 is calculated according to the working parameters, and the running state of the motor 102 is changed according to the impact frequency, so that the running state of the motor 102 is in a preset state corresponding to the impact frequency.
Wherein the impact element 101 is connected with an output shaft of the motor 102, and the motor 102 rotates to drive the impact element 101 to work. The impact element 101 is used to perform the function of a smart power tool. The power supply module 103 is electrically connected with the motor, and provides electric energy for the motor, and the power supply module 103 can be a rechargeable lithium battery or the like. The parameter detecting unit 100 is electrically connected to the motor 102, wherein the parameter detecting unit 100 is configured to detect an operating parameter of the motor 102, such as a current value and a rotation speed of the motor during operation, and the parameter detecting unit 100 is electrically connected to the controller 106 and is configured to send the operating parameter information of the motor 102 detected in real time to the controller 106.
The impact element 101 is under different working conditions, and the impact frequency is different, so that the required rotation speed of the motor 102 is different. The impact frequency of the impact element 101 corresponds to the preset rotation speed of the motor 102, and when the impact frequency is large, the rotation speed of the motor 102 needs to be reduced, for example, when the impact frequency is too large when the impact element 101 impacts a steel plate, the rotation speed of the motor 102 needs to be reduced, so that the impact element 101 is prevented from being damaged.
Specifically, the motor 102 is connected to the impact element 101, and the motor 102 moves at a certain rotation speed to drive the impact element 101 to work. The parameter detection unit 100 detects the operation parameter of the motor 102 in real time and transmits the same to the controller 106. The controller 106 calculates the impact frequency of the impact element 101 according to the received working parameters of the motor 102, and adjusts the operation state of the motor 102 according to the impact frequency of the impact element 101, so that the operation state of the motor is in a preset state corresponding to the impact frequency. According to the technical scheme, the intelligent electric tool comprises: an impact element; a motor for driving the impact element to act; the power supply module is used for supplying power to the motor; the parameter detection unit is used for detecting the working parameters of the motor; the controller is at least electrically connected with the motor and the parameter detection unit; the controller is configured to: acquiring working parameters of a motor; and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency to enable the running state of the motor to be in a preset state corresponding to the impact frequency. The intelligent electric tool solves the problems that in the prior art, the impact effect is poor, the impact is invalid in advance, the mechanical structure is damaged and the like due to manual grasping of the impact force, so that the impact electric tool can automatically control the rotating speed of a motor according to different working conditions in the working process, the safety of the mechanical structure is ensured while the speed is ensured, and the working efficiency is improved.
The intelligent electric tool provided by the embodiment of the invention can execute the control method of the intelligent electric tool provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
As an intelligent power tool of a specific embodiment, the intelligent power tool may be an impact wrench impact screwdriver including an impact element, a motor, a controller, a drill bit for fastening a screw, and a parameter detection unit. Based on the above embodiment, taking an impact wrench impact screwdriver as an example, the specific working principle of the intelligent electric tool provided by the embodiment of the invention is as follows: the motor 102 is connected with the impact element 101, and the motor 102 moves at a certain rotating speed to drive the impact element 101 to work. The parameter detection unit 100 detects an operation parameter of the motor 102 (e.g., an operation current and a rotation speed of the motor) in real time and transmits the same to the controller 106. The controller 106 calculates the impact frequency of the impact element 101 according to the received working parameters of the motor 102, and adjusts the operation state of the motor 102 according to the impact frequency of the impact element 101, so that the operation state of the motor is in a preset state corresponding to the impact frequency. Therefore, the real-time impact frequency of the impact element 101 is calculated by acquiring the real-time working parameters of the motor 102, and the running state of the motor 102 is adjusted according to the real-time calculated impact frequency, so that the running state of the motor corresponding to the requirements of the impact element 101 under different impact frequencies is met, speed control is realized aiming at different impact working conditions, the safety of a mechanical structure is ensured while the speed is ensured, the phenomena that the impact effect is not good enough, the impact is invalid in advance due to overlarge impact force, and even the mechanical structure is damaged are avoided.
Fig. 2 is a block diagram of a circuit structure of another intelligent electric tool according to an embodiment of the present invention, and fig. 3 is a graph of a current variation of a motor according to an embodiment of the present invention in a preset detection period. Optionally, the operating parameters include an operating current and a rotational speed of the motor; the controller 106 is configured to:
the impact frequency of the impact element is determined according to the number of peaks of the operating current of the motor 102 in the preset detection period and the preset detection period.
The rotation speed of the motor 102 is changed according to the impact frequency, so that the rotation speed of the motor 102 is in a preset rotation speed range corresponding to the impact frequency.
The operating parameters include an operating current and a rotational speed of the motor, and the parameter detecting unit 100 includes a current detecting unit 104 and a rotational speed detecting unit 105. Referring to fig. 2, the current detection unit 104 is electrically connected to the motor 102 and the controller 106, respectively, for detecting the rotation speed of the motor 102; the rotation speed detection unit 105 is electrically connected to the motor 102 and the controller 106, respectively, for detecting the rotation speed of the motor 102.
Specifically, the working parameters of the motor include a working current and a rotation speed of the motor, and the controller can change the rotation speed of the motor 102 according to the impact frequency, so that the rotation speed of the motor 102 is in a preset rotation speed range corresponding to the impact frequency.
It should be noted that, the controller 106 may also calculate the impact frequency of the impact element 101 according to the received working current and/or the rotation speed of the motor 102, and adjust the rotation speed of the motor 102 according to the impact frequency of the impact element 101, so that the rotation speed of the motor is within a preset rotation speed range corresponding to the impact frequency. The specific motor parameters may be set according to actual situations, and are not specifically limited herein.
Specifically, the impact of the impact element 101 can be calculated from the ratio of the number of peaks of the operating current of the motor 102 in the preset detection period to the preset detection periodFrequency of hits. The preset detection period may be a detection period, and specific values may be set according to actual detection requirements, which are not limited herein specifically. Exemplary, referring to fig. 3, L0 is a change curve of the operating current of the motor detected by the current detection unit, and a preset detection period is set to be T 0 At T 0 The number of peaks of the current in the detection period is n, and the impact frequency P of the impact element 0 The method comprises the following steps:
optionally, the controller 106 is configured to:
the current working condition of the intelligent electric tool is identified according to the impact frequency, and the rotating speed of the motor 102 is changed according to the working condition, so that the rotating speed of the motor 102 is in a preset rotating speed range under the working condition.
The working conditions of the intelligent electric tools are different, and the impact force (or impact speed) required by the impact element 101 is different, so that the required rotation speed of the motor 102 is also different. Taking an intelligent electric tool as an impact screw driver of an impact wrench as an example, the impact screw driver of the impact wrench has different impact speeds under different working conditions, and the striking force to the impact block is different. Under certain working conditions, if the impact strength is too small, the impact strength is insufficient, and the impact effect is poor; if the impact strength is too high, early failure of the impact structure is likely to occur. In one embodiment, the working conditions of the impact wrench impact screw driver can comprise two working conditions of bolting by a steel plate and bolting by wood, and in general, due to softer wood, certain displacement of the wood can occur under the same impact force, so that the impact frequency in the same impact time is smaller than that of the steel plate. When the current impact object is identified as a steel plate or a steel plate-like material according to the impact frequency, the motor rotation speed needs to be reduced so as not to damage the impact element. Therefore, the controller 106 can identify the current working condition of the intelligent electric tool according to the impact frequency of the impact element 101 calculated in real time, and adjust the rotation speed of the motor 102 to be within the preset rotation speed range under the corresponding working condition according to the identified working condition, so as to realize speed control on different working conditions.
It should be noted that, the present embodiment only uses the working conditions of the impact wrench for impacting the screw driver including steel plate bolting and wood bolting as an example, and may also include other working conditions such as wall bolting, which is not specifically limited in the present embodiment.
Optionally, the controller 106 is configured to:
when the impact frequency is in a first preset range, determining that the intelligent electric tool is under an impact working condition of a first impact object;
when the impact frequency is within a second preset range, determining that the intelligent electric tool is under the impact working condition of a second impact object;
the first preset range is greater than the second preset range.
In one embodiment, the first impact object may be wood or a wood-like softer material and the second impact object may be a steel plate or a steel plate-like hard material. Preferably, the first preset range may be more than 4400BMP and less than or equal to 4700BMP, the second preset range may be less than or equal to 4400BMP, the first impact object may be a steel plate bolting condition, and the second impact object may be a wood bolting condition. When the impact frequency calculated by the controller 106 is within a first preset range, the intelligent electric tool can be identified to be under the impact working condition of bolting a steel plate; when the impact frequency is in the second preset range, the intelligent electric tool can be identified to be under the impact working condition of wood screw driving.
The present embodiment is described by taking an impact wrench and an impact screw as an example, and may include tools such as an electric drill and an electric drill screw, and is not particularly limited in the present embodiment.
Optionally, the controller is configured to:
and under the impact working condition of the first impact object, the rotating speed of the motor is reduced.
Specifically, the controller adjusts the motor speed according to the identified working condition and the motor speed required under the corresponding working condition. Taking an impact wrench as an example, if the current working condition of the intelligent electric tool is identified as a steel plate bolting working condition, the rotating speed of the motor is reduced, so that the motor is in a preset rotating speed range corresponding to the steel plate bolting working condition, and the service life of the motor can be prevented from being influenced by overlarge vibration.
Similarly, if the intelligent electric tool is identified to be under the impact working condition of the second impact object (such as the working condition of wood screw driving), the rotating speed of the motor is reduced, so that the intelligent electric tool is in the preset rotating speed range corresponding to the working condition of wood screw driving.
Optionally, the controller may be further configured to: when the motor is detected to run at the idle speed at the first preset speed, if the load is detected, the motor is controlled to run at the second preset speed, so that the service life of the motor or a trigger and other structures can be prevented from being influenced by vibration of the tool due to the overlarge rotating speed of the motor. Wherein the second preset speed is less than the first preset speed, the first preset speed may be 30000 revolutions per minute, and the second preset speed may be 28000 revolutions per minute.
Optionally, fig. 4 is a circuit system block diagram of a smart power tool provided in an embodiment of the present invention. Referring to fig. 4, the motor 102 may be a three-phase motor, and the intelligent electric tool further includes a driving circuit 10, where the driving circuit 10 is electrically connected to the power supply module 103, the controller 106, the current detection unit 104, and the motor 102; the power module 103 is also electrically connected to the controller 106.
The driving circuit 10 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a sixth transistor Q6, and the motor 102 may be a three-phase motor; the first end of the first transistor Q1, the first end of the second transistor Q2 and the first end of the third transistor Q3 are electrically connected with the positive electrode of the power supply module 103, the second end of the first transistor Q1 is respectively connected with the first end of the fourth transistor Q4 and the first phase a of the motor 102, the second end of the second transistor Q2 is respectively connected with the first end of the fifth transistor Q5 and the second phase B of the motor, the second end of the third transistor Q3 is respectively connected with the first end of the sixth transistor Q6 and the third phase C of the motor, and the second end of the fourth transistor Q4, the second end of the fifth transistor Q5 and the second end of the sixth transistor Q6 are electrically connected with the negative electrode of the power supply module 103; the control terminal of the first transistor Q1, the control terminal of the second transistor Q2, the control terminal of the third transistor Q3, the control terminal of the fourth transistor Q4, the control terminal of the fifth transistor Q5, and the control terminal of the sixth transistor Q6 are electrically connected to the controller 106. The six transistors may be semiconductor power devices (e.g., FETs, BJTs, IGBTs, etc.) or any other type of solid state switch, such as Insulated Gate Bipolar Transistors (IGBTs), bipolar Junction Transistors (BJTs), etc.
In order to rotate the motor, the driving circuit 10 has a plurality of driving states, in which a magnetic field is generated by the stator winding of the motor, and the controller 106 outputs a corresponding PWM control signal to the switching element in the driving circuit 10 according to the rotor position or back electromotive force of the motor to switch the driving state of the driving circuit 10, so that the stator winding generates a variable magnetic field to drive the rotor to rotate, thereby realizing rotation or commutation or rotation speed adjustment of the motor. It should be noted that any other circuit and control method capable of driving the rotation or commutation or rotation speed adjustment of the motor may be used in the present disclosure, and the circuit structure of the driving circuit 10 and the control of the driving circuit 10 by the controller 106 are not limited in the present disclosure.
Fig. 5 is a flowchart of a control method of an intelligent electric tool according to an embodiment of the present invention, where the method may be implemented by the intelligent electric tool according to the embodiment of the present invention, and the intelligent electric tool includes an impact element, and a motor for driving the impact element to act; the power supply module is used for supplying power to the motor; the number detection unit is used for detecting the working parameters of the motor; and the controller is at least electrically connected with the motor and the parameter detection unit. Referring to fig. 5, the control method specifically includes the steps of:
step 110, acquiring working parameters of a motor; wherein the operating parameters include operating current and rotational speed of the motor.
The intelligent electric tool comprises a motor, a controller, a current detection unit, a rotation speed detection unit and the like, and specifically, the current value of the motor in operation can be obtained through the current detection unit, such as a current sampling circuit; the rotational speed of the motor may be obtained by a rotational speed detection unit, such as a hall sensor. The current detection unit is respectively and electrically connected with the motor and the controller, and can be a current sampling circuit, and the current sampling circuit can comprise a current detection resistor, and the current value output by the motor can be obtained by collecting the current flowing through the current detection resistor. And the current value output by the motor is acquired in real time through the current sampling circuit, and the current value acquired in real time is fed back to the controller in real time. The rotating speed detection unit is respectively and electrically connected with the motor and the controller, and can be a Hall sensor, so that the real-time rotating speed of the motor can be obtained through the Hall sensor, and the real-time collected rotating speed of the motor is fed back to the controller in real time. The current collected by the current sampling circuit can comprise the current of the intelligent electric tool at any time such as during the starting-up and starting-up process, during the working process, before the shutdown and the like.
And 120, calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency to enable the running state of the motor to be in a preset rotating speed range corresponding to the impact frequency.
Specifically, the motor is connected with the impact element, and the motor drives the impact element to work at a certain rotating speed. The parameter detection unit detects the working parameters of the motor (such as the working current and the rotating speed of the motor) in real time and sends the working parameters to the controller. The controller calculates the impact frequency of the impact element according to the received working parameters of the motor, and adjusts the running state of the motor (such as the rotating speed of the motor) according to the impact frequency of the impact element, so that the running state of the motor is in a preset state corresponding to the impact frequency. Therefore, the real-time impact frequency of the impact element is calculated by acquiring the real-time working parameters of the motor, and the rotating speed of the motor is adjusted according to the real-time calculated impact frequency, so that the motor rotating speed of the impact element corresponding to the requirements under different impact frequencies is met, speed control is realized for different impact working conditions, the safety of a mechanical structure is ensured while the speed is ensured, the phenomena that the impact effect is poor enough, the impact force is too large to cause early failure of impact, and even the mechanical structure is damaged are avoided.
According to the technical scheme, the intelligent electric tool control method is executed by the intelligent electric tool, and the intelligent electric tool comprises an impact element and a motor, wherein the motor is used for driving the impact element to act; the power supply module is used for supplying power to the motor; the number detection unit is used for detecting the working parameters of the motor; and the controller is at least electrically connected with the motor and the parameter detection unit. The control method comprises the following steps: acquiring working parameters of a motor; and calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency to enable the running state of the motor to be in a preset state corresponding to the impact frequency. The intelligent electric tool control method solves the problems that in the prior art, the impact effect is poor, the impact is invalid in advance, the mechanical structure is damaged and the like due to manual grasping of the impact force, so that the impact electric tool can automatically control the rotating speed of a motor according to different working conditions in the working process, the safety of the mechanical structure is ensured while the speed is ensured, and the working efficiency is improved.
Optionally, the operating parameters include an operating current and a rotational speed of the motor; calculating the impact frequency of the impact element based on the operating parameters, comprising: and determining the impact frequency of the impact element according to the wave crest number of the working current of the motor in the preset detection period and the preset detection period.
Optionally, the control method of the intelligent electric tool further includes: and identifying the current working condition of the intelligent electric tool according to the impact frequency, and changing the rotating speed of the motor according to the working condition, so that the rotating speed of the motor is in a preset rotating speed range under the working condition.
Optionally, identifying the current working condition of the intelligent electric tool according to the impact frequency includes:
when the impact frequency is in a first preset range, determining that the intelligent electric tool is under an impact working condition of a first impact object;
when the impact frequency is within a second preset range, determining that the intelligent electric tool is under the impact working condition of a second impact object;
the first preset range is larger than the second preset range.
Optionally, the control method of the intelligent electric tool further includes: and under the impact working condition of the first impact object, the rotating speed of the motor is reduced.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. An intelligent power tool comprising:
an impact element;
a motor for driving the impact element to act;
the power supply module is used for supplying power to the motor;
the parameter detection unit is used for detecting the working parameters of the motor;
the controller is at least electrically connected with the motor and the parameter detection unit;
the controller is configured to:
acquiring working parameters of the motor;
calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency so that the running state of the motor is in a preset state corresponding to the impact frequency;
identifying the current working condition of the intelligent electric tool according to the impact frequency, and changing the rotating speed of the motor according to the working condition to enable the rotating speed of the motor to be in a preset rotating speed range under the working condition; wherein, the intelligent electric tool has different operating modes when impacting different impact objects.
2. The intelligent power tool according to claim 1, wherein,
the working parameters comprise working current and rotating speed of the motor;
the controller is configured to:
determining the impact frequency of the impact element according to the wave crest number of the working current of the motor in a preset detection period and the preset detection period;
and changing the rotating speed of the motor according to the impact frequency, so that the rotating speed of the motor is in a preset rotating speed range corresponding to the impact frequency.
3. The intelligent power tool according to claim 1, wherein,
the controller is configured to:
when the impact frequency is within a first preset range, determining that the intelligent electric tool is under an impact working condition of a first impact object;
when the impact frequency is within a second preset range, determining that the intelligent electric tool is under the impact working condition of a second impact object;
the first preset range is larger than the second preset range.
4. The intelligent power tool of claim 3, wherein the controller is configured to:
and under the impact working condition of the first impact object, reducing the rotating speed of the motor.
5. A control method of an intelligent electric tool, characterized in that the control method is executed by the intelligent electric tool, the intelligent electric tool comprises an impact element and a motor, and the motor is used for driving the impact element to act; the power supply module is used for supplying power to the motor; the parameter detection unit is used for detecting the working parameters of the motor; the controller is at least electrically connected with the motor and the parameter detection unit;
the control method comprises the following steps:
acquiring working parameters of the motor;
calculating the impact frequency of the impact element according to the working parameters, and changing the running state of the motor according to the impact frequency so that the running state of the motor is in a preset state corresponding to the impact frequency; identifying the current working condition of the intelligent electric tool according to the impact frequency, and changing the rotating speed of the motor according to the working condition to enable the rotating speed of the motor to be in a preset rotating speed range under the working condition; wherein, the intelligent electric tool has different operating modes when impacting different impact objects.
6. The control method of the intelligent electric tool according to claim 5, wherein the operation parameters include an operation current and a rotation speed of the motor;
said calculating the impact frequency of said impact element from said operating parameters comprises:
and determining the impact frequency of the impact element according to the wave crest times of the working current of the motor in a preset detection period and the preset detection period.
7. The method of claim 5, wherein the identifying the current operating condition of the intelligent power tool according to the impact frequency comprises:
when the impact frequency is within a first preset range, determining that the intelligent electric tool is under an impact working condition of a first impact object;
when the impact frequency is within a second preset range, determining that the intelligent electric tool is under the impact working condition of a second impact object;
the first preset range is larger than the second preset range.
8. The method of claim 7, further comprising:
and under the impact working condition of the first impact object, reducing the rotating speed of the motor.
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