CN114679102A - Electric tool and control method thereof - Google Patents
Electric tool and control method thereof Download PDFInfo
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- CN114679102A CN114679102A CN202011550175.1A CN202011550175A CN114679102A CN 114679102 A CN114679102 A CN 114679102A CN 202011550175 A CN202011550175 A CN 202011550175A CN 114679102 A CN114679102 A CN 114679102A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
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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
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
- H02P29/68—Controlling or determining the temperature of the motor or of the drive based on the temperature of a drive component or a semiconductor component
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Portable Power Tools In General (AREA)
Abstract
The embodiment of the invention discloses an electric tool and a control method thereof. The electric tool includes: a motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; the controller is at least electrically connected with the motor and the working parameter detection module; the controller is configured to: acquiring working parameters of a motor; when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, a first control signal is output to control a driving circuit to drive the motor to enter a second working mode. The problems that the existing electric tool is short in effective working time, low in working efficiency, poor in user experience and the like can be solved through the electric tool, tools such as a heavy-duty drill can automatically control the working mode of the motor according to the working parameters of the motor in the working process, and the effective working time of the electric tool is prolonged while the electric tool works under safe operation parameters.
Description
Technical Field
The embodiment of the invention relates to the technical field of electric tool control, in particular to an electric tool and a control method thereof.
Background
With the development of electric tools, the intelligent control technology of electric tools is more and more widely applied. For example, heavy-duty drills, drill bit drilling is realized by driving a motor through a controller, and the controller controls the switching of working modes and the like.
However, during the operation of the heavy-duty drill, if the heavy-duty drill is continuously operated, the temperature rises too fast, and in order to ensure the safety of the tool, the heavy-duty drill is usually stopped and cooled. For example, heavy-duty brill is in continuous work under the boost mode, and the temperature rise is very fast, for the protection heavy-duty brill, often can halt when its temperature reaches the overtemperature protection point, and wait longer time cooling after the machine halt and just can continue to use, therefore the effective operating time that leads to the instrument is shorter, and work efficiency is lower, and user experience is also relatively poor.
Disclosure of Invention
The invention provides an electric tool and a control method thereof, which can realize that a heavy-duty drill can automatically control the working mode of a motor according to the working parameters of the motor in the working process, so that the electric tool can efficiently work within a reasonable and safe working parameter range, and the service time of a user on the electric tool is ensured.
In a first aspect, an embodiment of the present invention provides an electric tool, including:
a motor; the power supply module is used for providing a power supply for the motor;
the driving circuit is electrically connected with the motor and is used for driving the motor to rotate;
the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time;
the controller is at least electrically connected with the driving circuit and the working parameter detection module;
the controller is configured to:
acquiring working parameters of the motor;
when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, outputting a first control signal to control the driving circuit to drive the motor to enter a second working mode.
In a second aspect, an embodiment of the present invention further provides a control method of an electric tool, the control method being performed by the electric tool, the electric tool including: a motor; the power supply module is used for providing a power supply for the motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; the controller is at least electrically connected with the driving circuit and the working parameter detection module;
the control method comprises the following steps:
acquiring working parameters of the motor;
when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, outputting a first control signal to control the driving circuit to drive the motor to enter a second working mode.
The present invention provides an electric power tool including: a motor; the power supply module is used for providing a power supply for the motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; the controller is at least electrically connected with the driving circuit and the working parameter detection module; the controller is configured to: acquiring working parameters of a motor; when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, a first control signal is output to control a driving circuit to drive the motor to enter a second working mode. The electric tool can solve the problems that the existing electric tool has short effective working time, low working efficiency, poor user experience and the like, so that tools such as a heavy-duty drill can automatically control the working mode of the motor according to the working parameters of the motor in the working process, the effective working time of the electric tool is increased while the electric tool works under safe operation parameters, and the efficiency is improved.
Drawings
Fig. 1 is a block diagram showing a circuit configuration of an electric power tool according to an embodiment of the present invention;
FIG. 2 is a block diagram of circuitry for a power tool in an embodiment of the present invention;
FIG. 3 is a graph of temperature change during operation of a prior art motor;
FIG. 4 is a graph of temperature change during operation of a motor in an embodiment of the present invention;
FIG. 5 is a block diagram of circuitry for another power tool in an embodiment of the present invention;
fig. 6 is a flowchart of a control method of an electric tool in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a circuit structure of an electric tool according to an embodiment of the present invention. Referring to fig. 1, the power tool includes: a motor 101; a power module 10 for providing power supply for the motor 101; the driving circuit 102 is electrically connected with the motor 101 and used for driving the motor 101 to rotate; the working parameter detection module 103 is used for detecting and obtaining the working parameters of the motor 101 in real time; a controller 104 electrically connected to at least the driving circuit 102 and the operation parameter detection module 103; the controller 104 is configured to: acquiring working parameters of the motor 101; when the motor 101 works in the first working mode and the working parameter is greater than or equal to the first parameter threshold, the first control signal is output to control the driving circuit 102 to drive the motor 101 to enter the second working mode.
The first parameter threshold is a working parameter that ensures safe or reasonable operation of the motor 101, such as a safe current parameter, a safe voltage parameter, a safe power parameter, a safe temperature parameter, and the like. The specific parameter types and values may be set according to actual situations, and are not specifically limited herein.
The first operation mode may be an operation mode in which the motor 101 outputs a relatively large power, and the second operation mode may be an operation mode in which the motor 101 outputs a relatively small power. For example, in the case of the power tool being a heavy-duty drill, the first operating mode may be a boost mode, and the second operating mode may be a normal mode.
The first control signal may be a speed reduction control signal, a power reduction control signal, or other control signals. The specific setting may be set according to actual conditions, and is not specifically limited herein.
The controller 104 is electrically connected to the driving circuit 102, the driving circuit 102 is connected to the motor 101, and the controller 104 controls the driving circuit 102 to drive the motor 101 to rotate. The working parameter detection module 103 is electrically connected to the motor 101 and the controller 104, and is configured to detect a working parameter of the motor 101 in real time and send the working parameter to the controller 104. The controller 104 adjusts the working mode of the electric tool according to the real-time received working parameters of the motor 101, when the working parameters meet certain conditions, so as to increase the effective working time of the electric tool while ensuring that the electric tool works under safe operation parameters, thereby improving the working efficiency. For example, when the motor 101 operates in the first operation mode and the operation parameter of the motor 101 is greater than or equal to the first parameter threshold, the controller 104 outputs the first control signal (e.g., PWM control speed reduction signal) to control the driving circuit 102 to drive the motor 101 to enter the second operation mode, wherein the output power of the motor in the second operation mode is smaller than the output power in the first operation mode, so that the operation parameter of the motor is within the safe operation parameter range (e.g., the first parameter threshold), and the motor can continue to operate in the second operation mode without being stopped to meet the safe parameter. Therefore, the effective working time of the electric tool can be prolonged, and the efficiency is improved.
The electric tool provided by the embodiment of the invention can execute the control method of the electric tool provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
As a specific example of the power tool, the power tool may be a heavy-duty drill, and the heavy-duty drill includes a motor, a controller, a driving circuit, a working bit, and a working parameter detection module. On the basis of the above embodiment, taking the heavy-duty drill as an example, the specific working principle of the electric tool provided by the embodiment of the invention is as follows: the driving circuit 102 is electrically connected with the motor 101 and the controller 104, and the controller 104 controls the driving circuit 102 to drive the motor 101 to rotate so as to drive the working drill bit to work. The operation parameter detection module 103 detects the operation parameters (e.g., the temperature of the motor, the operation current, the voltage, the rotation speed, etc.) of the motor 101 in real time, and sends the detected operation parameters to the controller 104. The controller 104 determines, based on the received operating parameters of the motor 101: when the motor 101 operates in the boost mode (i.e., the first operating mode) and the operating parameter of the motor 101 is greater than or equal to the first parameter threshold, the controller 104 outputs a first control signal (e.g., a PWM control speed reduction signal) to control the driving circuit 102 to drive the motor 101 to enter the normal mode (i.e., the second operating mode), wherein the output power of the motor 101 in the normal mode is less than the output power in the boost mode, so that the operating parameter of the motor is within the safe operating parameter range (e.g., the first parameter threshold), and the motor does not need to be stopped to meet the safe parameter, and can continue to operate in the normal mode, thereby increasing the effective operating time of the electric tool and improving the efficiency.
Fig. 2 is a circuit system block diagram of an electric tool provided in an embodiment of the present invention, fig. 3 is a temperature variation curve in operation of a motor in the prior art, and fig. 4 is a temperature variation curve in operation of a motor provided in an embodiment of the present invention. Optionally, referring to fig. 2, the working parameter detecting module 103 includes a first detecting unit 11, the driving circuit 102 is integrated on the driving circuit board, and the first detecting unit 11 is electrically connected to the driving circuit board and the controller 104, respectively, and is configured to detect and obtain the temperature of the driving circuit board in real time;
the controller 104 is configured to:
acquiring the temperature of the driving circuit board;
when the motor 101 works in the first working mode and the temperature of the driving circuit board is greater than or equal to the first preset temperature, the second control signal is output to control the driving circuit 102 to drive the motor 101 to enter the second working mode.
The motor 101 may be a three-phase motor. The second control signal may be a PWM control signal.
Wherein, when the electric tool is a heavy-duty drill, the first preset temperature may be 70 degrees. The specific value is set according to the type of the actual electric tool and the specific working condition of the electric tool, and is not limited specifically here.
For example, referring to fig. 3, in the prior art, when the heavy-duty drill continuously works in the boost mode, the temperature rise is fast, when the temperature rises to a higher temperature (for example, 90 degrees in fig. 3), the electric tool is controlled to stop to cool through manual operation, and the electric tool often needs to wait for a longer time to cool before being used, and referring to fig. 3, the effective use time of the electric tool is t, and the user experience is poor. In the embodiment, referring to fig. 4, when the motor 101 operates in the boost mode, and the first detection unit 11 detects that the temperature of the driving circuit board is greater than or equal to a first preset temperature (for example, 70 degrees), the controller 104 outputs a second control signal to control the driving circuit 102 to drive the motor 101 to enter the normal mode (i.e., the normal mode in fig. 4), so that the heavy-duty drill can be continuously used in the normal mode, and the temperature of the heavy-duty drill is controlled within the temperature range of safe operation. Referring to fig. 4, the effective operating time of the electric power tool is t + t 0. From this, can increase the effective live time that the heavy load bored, raise the efficiency, promote user's experience effect simultaneously.
Optionally, the first preset temperature is a temperature protection point of the driving circuit board in the first working mode; the temperature protection point of the driving circuit board in the second working mode is a second preset temperature; wherein the second preset temperature is greater than the first preset temperature.
In an example of the heavy-duty drill, the first predetermined temperature may be 70 degrees, and the second predetermined temperature may be 90 degrees. The specific value is set according to the type of the actual electric tool and the specific working condition of the electric tool, and is not limited specifically here.
Referring to fig. 2, the power tool further includes a power module 10 and a power conversion circuit 20. The power conversion circuit 20 is electrically connected to the power module 10 and the first detection unit 11, and is configured to convert a voltage output by the power module 10 into a supply voltage of the first detection unit 11 and the controller 104.
Referring to fig. 2, the driving circuit 102 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 101 may be a three-phase motor; a first end of the first transistor Q1, a first end of the second transistor Q2, and a first end of the third transistor Q3 are electrically connected to a positive electrode of the power module 10, a second end of the first transistor Q1 is respectively connected to a first end of the fourth transistor Q4 and a first phase a of the motor 101, a second end of the second transistor Q2 is respectively connected to a first end of the fifth transistor Q5 and a second phase B of the motor 101, a second end of the third transistor Q3 is respectively connected to a first end of the sixth transistor Q6 and a third phase C of the motor 101, and a second end of the fourth transistor Q4, a second end of the fifth transistor Q5, and a second end of the sixth transistor Q6 are electrically connected to a negative electrode of the power module 10; 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 104. 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 101, the driving circuit 102 has a plurality of driving states, in a driving state, a stator winding of the motor generates a magnetic field, and the controller 104 outputs a corresponding PWM control signal to the switching element in the driving circuit 102 according to a rotor position or a back electromotive force of the motor to switch the driving state of the driving circuit 102, so that the stator winding generates a changing magnetic field to drive the rotor to rotate, thereby realizing rotation or phase change or rotation speed adjustment of the motor. It should be noted that any other circuit and control method capable of driving the rotation or phase change or rotation speed adjustment of the motor can be used in the present disclosure, and the present disclosure does not limit the circuit structure of the driving circuit 102 and the control of the driving circuit 102 by the controller 104.
The driving Circuit 102 may be integrated on a driving Circuit Board, i.e., a Printed Circuit Board (PCB). The PCB board can adopt aluminium base board, and its heat conductivity is good. The temperature of all transistors on the PCB board may be considered the same and may be equal to the temperature of the PCB board. Specifically, the first detection unit 11 may detect the temperature of all transistors on the PCB to detect the temperature of the driving circuit, and may also detect the temperature of other components on the PCB, which may be specifically set according to the actual situation, and is not specifically limited herein.
Alternatively, referring to fig. 2, the first detection unit 11 is a thermistor NTC.
Fig. 5 is a circuit system block diagram of another electric tool provided in the embodiment of the present invention. Optionally, referring to fig. 5, the working parameter detecting module 103 includes a second detecting unit 12, where the second detecting unit 12 is electrically connected to the motor 101 and the controller 104, respectively, and is configured to detect and obtain an output electrical parameter of the motor 101 in real time;
the controller 104 is configured to:
acquiring an output electrical parameter of the motor 101;
when the motor 101 operates in the first operating mode and the output electrical parameter of the motor is greater than or equal to the second parameter threshold value, a third control signal is output to control the driving circuit 102 to drive the motor 101 to enter the second operating mode.
Wherein, the third control signal may be a PWM control signal.
Specifically, the controller 104 is electrically connected to the motor 101 and the driving circuit 102, respectively, the driving circuit 102 is connected to the motor 101, and the controller 104 controls the driving circuit 102 to drive the motor 101 to rotate. The second detecting unit 12 is electrically connected to the motor 101 and the controller 104, and is configured to detect an output electrical parameter of the motor 101 in real time and send the output electrical parameter to the controller 104. The controller 104 controls the driving circuit 102 to drive the motor 101 to adjust the working mode of the electric tool by outputting a third control signal according to the real-time received output electrical parameter of the motor 101 when the output electrical parameter meets a certain condition, thereby ensuring that the electric tool works under safe operation parameters, increasing the effective working time of the electric tool, and improving the working efficiency.
It should be noted that, the electric tool may only include the first detection unit 11, the first detection unit 11 detects the temperature of the driving circuit board in real time and sends the detected temperature to the controller 104, and the controller 104 controls the working mode of the motor 101 according to the received temperature information, so as to ensure the safe operation of the motor and improve the effective service time of the electric tool; the electric tool may only comprise the second detection unit 12, the output electrical parameter of the motor 101 is detected in real time through the second detection unit 12 and is sent to the controller 104, and the controller 104 controls the working mode of the motor 101 according to the received electrical parameter of the motor, so as to ensure the safe operation of the motor and improve the effective service time of the electric tool; the electric tool also can simultaneously comprise a first detection unit 11 and a second detection unit 12, the first detection unit 11 detects the temperature of the driving circuit board in real time and sends the temperature to the controller 104, the second detection unit 12 detects the output electric parameters of the motor 101 in real time and sends the output electric parameters to the controller 104, and the controller 104 controls the working mode of the motor 101 according to the received temperature information of the driving circuit 102 and the electric parameters of the motor, so that the safe operation of the motor is ensured, and the effective service time of the electric tool is prolonged. The specific structure and control strategy may be set according to actual situations, and are not specifically limited herein.
Optionally, the output electrical quantity of the electric machine 101 comprises an operating current or an operating voltage or an output power of the electric machine 101.
When the output electrical parameter of the motor 101 is the working current of the motor 101, the second detecting unit 12 may be a current transformer; when the output electrical parameter of the motor 101 is the working voltage of the motor 101, the second detecting unit 12 may be a voltage transformer; when the output electrical parameter of the motor 101 is the output power of the motor 101, the second detecting unit 12 may be a voltage-current detecting sensor, and calculates the output power of the motor by detecting the operating current and the operating voltage of the motor.
Fig. 6 is a flowchart of a control method for an electric tool according to an embodiment of the present invention, where the implementation process of the control method for an electric tool according to the embodiment is applicable to the electric tool, and the method can be executed by the electric tool according to the embodiment of the present invention, where the electric tool includes: a motor; the power supply module is used for providing a power supply for the motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; and the controller is at least electrically connected with the driving circuit and the working parameter detection module. Referring to fig. 6, the control method specifically includes the steps of:
and 110, acquiring working parameters of the motor.
The electric tool comprises a motor, a controller, a driving circuit, a working parameter detection module and the like, wherein the working parameter detection module is used for detecting and obtaining working parameters of the motor in real time and sending the working parameters to the controller. The working parameters of the motor can be working current, working voltage, rotating speed, output power, temperature and the like of the motor. Specifically, the current value of the motor in operation can be obtained by a current detection unit, such as a current sampling circuit; the voltage value of the motor in operation can be acquired by a voltage detection sensor; the rotating speed of the motor can be obtained by a rotating speed detection unit, such as a Hall sensor; the temperature of the motor may be acquired by a temperature detection unit, such as a thermistor.
And 120, outputting a first control signal to control the driving circuit to drive the motor to enter a second working mode when the motor works in the first working mode and the working parameter is greater than or equal to the first parameter threshold value.
Specifically, the working parameter detection unit detects the working parameters of the motor in real time and sends the working parameters to the controller. The controller controls the motor to work in a first working mode, when the working parameters of the motor received by the controller are larger than or equal to a first parameter threshold value, the situation that unsafe operation environment is about to occur to the working parameters of the motor at the moment is indicated, in order to enable the motor to operate in a safe or reasonable operation environment, a first control signal at the output end of the controller controls the driving circuit to drive the motor to be switched to a second working mode, wherein the second working mode is a normal mode or a safe working mode, so that the electric tool can be ensured to work under the safe operation parameters, meanwhile, the effective working time of the electric tool is prolonged, the working efficiency is improved, and the experience effect of a user is improved.
In an aspect of the present embodiment, there is provided a method for controlling an electric power tool, the method being performed by the electric power tool, the electric power tool including: a motor; the power supply module is used for providing a power supply for the motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; and the controller is at least electrically connected with the driving circuit and the working parameter detection module. The control method comprises the following steps: acquiring working parameters of a motor; when the motor works in the first working mode and the working parameter is larger than or equal to the first parameter threshold value, the first control signal is output to control the driving circuit to drive the motor to enter the second working mode. By the control method, the problems that the existing electric tool is short in effective working time, low in working efficiency, poor in user experience and the like can be solved, tools such as heavy-duty drills can automatically control the working mode of the motor according to the working parameters of the motor in the working process, the electric tool can work efficiently within a reasonable and safe working parameter range, and accordingly the service time of the user on the electric tool is guaranteed.
Optionally, the driving circuit is integrated on the driving circuit board, and the working parameter detection module includes a first detection unit, which is electrically connected to the driving circuit board and the controller, respectively, and is configured to detect and obtain the temperature of the driving circuit board in real time;
the control method comprises the following steps:
acquiring the temperature of the driving circuit board;
when the motor works in a first working mode and the temperature of the driving circuit board is greater than or equal to a first preset temperature, a second control signal is output to control the driving circuit to drive the motor to enter a second working mode.
Optionally, the first preset temperature is a temperature protection point of the driving circuit board in a first working mode; the temperature protection point of the driving circuit board in the second working mode is a second preset temperature; wherein the second preset temperature is greater than the first preset temperature.
Optionally, the working parameter detection module includes a second detection unit, and the second detection unit is electrically connected to the motor and the controller, respectively, and is configured to detect and obtain an output electrical parameter of the motor in real time;
the control method comprises the following steps:
acquiring an output electric parameter of the motor;
and when the motor works in the first working mode and the output electric parameter of the motor is greater than or equal to the second parameter threshold value, outputting a third control signal to control the driving circuit to drive the motor to enter the second working mode.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A power tool, comprising:
a motor;
the power supply module is used for providing a power supply for the motor;
the driving circuit is electrically connected with the motor and is used for driving the motor to rotate;
the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time;
the controller is at least electrically connected with the driving circuit and the working parameter detection module;
the controller is configured to:
acquiring working parameters of the motor;
when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, outputting a first control signal to control the driving circuit to drive the motor to enter a second working mode.
2. The electric tool according to claim 1, wherein the driving circuit is integrated on a driving circuit board, and the working parameter detection module comprises a first detection unit, and the first detection unit is electrically connected with the driving circuit board and the controller respectively and is used for detecting and obtaining the temperature of the driving circuit board in real time;
the controller is configured to:
acquiring the temperature of the driving circuit board;
when the motor works in the first working mode and the temperature of the driving circuit board is greater than or equal to a first preset temperature, a second control signal is output to control the driving circuit to drive the motor to enter the second working mode.
3. The power tool of claim 2, wherein the first predetermined temperature is a temperature protection point of the drive circuit board in the first operating mode; the temperature protection point of the driving circuit board in the second working mode is a second preset temperature; wherein the second preset temperature is greater than the first preset temperature.
4. The power tool according to claim 2, wherein the first detection unit is a thermistor.
5. The electric tool according to claim 1, wherein the working parameter detecting module comprises a second detecting unit, and the second detecting unit is electrically connected with the motor and the controller respectively and is used for detecting and obtaining the output electric parameters of the motor in real time;
the controller is configured to:
acquiring an output electric parameter of the motor;
when the motor works in the first working mode and the output electric parameter of the motor is larger than or equal to the second parameter threshold value, outputting a third control signal to control the driving circuit to drive the motor to enter the second working mode.
6. The power tool of claim 5, wherein the output electrical parameter of the motor comprises an operating current or an operating voltage or an output power of the motor.
7. A control method of an electric power tool, characterized by being executed by an electric power tool comprising: a motor; the power supply module is used for providing a power supply for the motor; the driving circuit is electrically connected with the motor and is used for driving the motor to rotate; the working parameter detection module is used for detecting and obtaining the working parameters of the motor in real time; the controller is at least electrically connected with the driving circuit and the working parameter detection module;
the control method comprises the following steps:
acquiring working parameters of the motor;
when the motor works in a first working mode and the working parameter is larger than or equal to a first parameter threshold value, outputting a first control signal to control the driving circuit to drive the motor to enter a second working mode.
8. The method according to claim 7, wherein the driving circuit is integrated on a driving circuit board, and the operating parameter detecting module includes a first detecting unit electrically connected to the driving circuit board and the controller, respectively, for detecting and obtaining the temperature of the driving circuit board in real time;
the control method comprises the following steps:
acquiring the temperature of the driving circuit board;
when the motor works in the first working mode and the temperature of the driving circuit board is greater than or equal to a first preset temperature, a second control signal is output to control the driving circuit to drive the motor to enter the second working mode.
9. The control method of the electric power tool according to claim 8, wherein the first preset temperature is a temperature protection point of the driving circuit board in the first operation mode; the temperature protection point of the driving circuit board in the second working mode is a second preset temperature; wherein the second preset temperature is greater than the first preset temperature.
10. The control method of the electric tool according to claim 7, wherein the working parameter detection module comprises a second detection unit, and the second detection unit is electrically connected with the motor and the controller respectively and is used for detecting and obtaining the output electric parameter of the motor in real time;
the control method comprises the following steps:
acquiring an output electric parameter of the motor;
when the motor works in the first working mode and the output electric parameter of the motor is larger than or equal to the second parameter threshold value, outputting a third control signal to control the driving circuit to drive the motor to enter the second working mode.
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| CN101733738A (en) * | 2008-11-10 | 2010-06-16 | 松下电工电动工具株式会社 | Rechargeable electric power tool |
| CN104518730A (en) * | 2013-09-27 | 2015-04-15 | 株式会社丰田自动织机 | Motor-driven compressor |
| CN108321769A (en) * | 2018-02-07 | 2018-07-24 | 浙江吉利汽车研究院有限公司 | A kind of electric machine control system failure protecting device and method based on CPLD and DSP |
| CN109873578A (en) * | 2017-12-04 | 2019-06-11 | 南京德朔实业有限公司 | The control method of electric tool and electric tool |
| CN110572089A (en) * | 2019-09-30 | 2019-12-13 | 南京德朔实业有限公司 | Electric tool and control method thereof |
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- 2020-12-24 CN CN202011550175.1A patent/CN114679102A/en active Pending
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| CN101733738A (en) * | 2008-11-10 | 2010-06-16 | 松下电工电动工具株式会社 | Rechargeable electric power tool |
| CN104518730A (en) * | 2013-09-27 | 2015-04-15 | 株式会社丰田自动织机 | Motor-driven compressor |
| CN109873578A (en) * | 2017-12-04 | 2019-06-11 | 南京德朔实业有限公司 | The control method of electric tool and electric tool |
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