CN112117940A - Electric tool torque control method and electric tool - Google Patents
Electric tool torque control method and electric tool Download PDFInfo
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- CN112117940A CN112117940A CN202011057951.4A CN202011057951A CN112117940A CN 112117940 A CN112117940 A CN 112117940A CN 202011057951 A CN202011057951 A CN 202011057951A CN 112117940 A CN112117940 A CN 112117940A
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- torque 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Portable Power Tools In General (AREA)
Abstract
A power tool torque control method, the power tool including a motor outputting two or more speeds of torque, a control circuit having a controller, and a battery having a rated voltage, the power tool torque control method comprising the steps of: detecting an actual voltage of the battery; a reference protection current value is set in the controller; setting a torque control current corresponding to the highest gear torque, wherein the torque control current is the ratio of the actual voltage to the rated voltage multiplied by the reference protection current value; the actual current of the motor is detected, and the motor is stopped when the actual current is equal to or greater than the torque control current.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of motor control, in particular to a torque control method and an electric tool.
[ background of the invention ]
For an electric tool, such as an electric drill or a screwdriver, which requires different torques to be output by the tool to adapt to different working situations, a mechanical overload clutch may be generally provided to limit the output torque, or the output torque may also be limited in an electronic control manner, because the output torque of a permanent magnet dc motor is approximately proportional to the current of the motor, the output torque may be limited by limiting the current of the motor, different control currents are correspondingly set at different gears of the electric tool, after the electric tool is started, when the current of the motor exceeds the corresponding control current, the motor is controlled to stop, but for reliable torque control and accurate output torque, the control current corresponding to the highest gear torque generally maintains a certain margin compared with the maximum current that the battery can provide to the motor, so when the highest gear torque is output, the maximum performance of the battery cannot be fully exerted, the demand of the user for higher torque cannot be met under some conditions.
Accordingly, it is desirable to provide a torque control method for an electric tool and an electric tool, which overcome the drawbacks of the prior art.
[ summary of the invention ]
In view of the shortcomings of the prior art, the invention aims to provide a torque control method of an electric tool and the electric tool, wherein the torque control method can improve the output torque of a motor and better exert the performances of a battery and the motor.
The technical scheme adopted by the invention for solving the problems in the prior art is as follows: a torque control method of an electric tool including a motor outputting two or more speeds of torque, a control circuit having a controller, and a battery having a rated voltage, the torque control method comprising the steps of detecting an actual voltage of the battery; a reference protection current value is set in the controller; setting a torque control current corresponding to the highest gear torque, wherein the torque control current is the ratio of the actual voltage to the rated voltage multiplied by the reference protection current value; and detecting the actual current of the motor, and stopping the motor when the actual current is equal to or larger than the torque control current.
Preferably, the reference protection current value is set as a locked-rotor current, and the locked-rotor current is the locked-rotor current when the motor is powered by the rated voltage.
Preferably, the locked-rotor current is provided with an error protection value; and setting the reference protection current value as the difference value of the locked rotor current and the error protection value.
Preferably, the battery includes one or more battery cells and has a rated total voltage, and detecting the actual voltage of the battery includes detecting the actual total voltage of the battery; the torque control current is the ratio of the actual total voltage to the rated total voltage multiplied by the reference protection current value.
Preferably, the battery includes one or more battery cells having individual rated voltages, and detecting the actual voltage of the battery includes detecting individual actual voltages of the battery cells; the torque control current is the ratio of the individual actual voltage to the individual rated voltage multiplied by the reference protection current value.
Preferably, the battery includes one or more battery cells having individual rated voltages, and the detecting the actual voltage of the battery includes detecting an individual actual voltage of each of the battery cells, and calculating an average actual voltage of the battery cells; the torque control current is the ratio of the average actual voltage to the individual rated voltage multiplied by the reference protection current value.
Preferably, the method further comprises the following steps of detecting the actual temperature of the battery and comparing the actual temperature with a preset temperature value, and stopping the motor when the actual temperature is higher than the preset temperature value; and stopping the motor when the actual voltage is lower than the preset undervoltage voltage.
In order to solve the problems in the prior art, the invention also provides an electric tool, which comprises a motor, a control circuit and a battery with rated voltage; the control circuit comprises a controller, the motor outputs more than two levels of torque, and the controller is electrically connected with a voltage detection module for detecting the actual voltage of the battery and a current detection module for detecting the actual current of the motor; the controller is provided with a reference protection current value and a torque control current corresponding to the highest gear torque, and the torque control current is set to be the ratio of the actual voltage to the rated voltage multiplied by the reference protection current value; and the controller detects that the actual current is equal to or larger than the torque control current and controls the motor to stop.
Preferably, the controller includes a memory, a locked-rotor current is stored in the memory, the locked-rotor current is a locked-rotor current when the motor is powered by the rated voltage, and the locked-rotor current is provided with an error protection value; and the controller sets the reference protection current value as the difference value between the locked rotor current and the error protection value.
Preferably, the battery includes one or more battery cells having individual rated voltages and a battery controller, and the battery includes a battery positive terminal, a battery negative terminal and a battery communication terminal, the battery controller detecting an actual voltage of the battery to be transmitted to the controller.
Compared with the prior art, the invention has the following beneficial effects: when the electric tool is set to be the highest-gear torque output, the torque output by the motor is increased along with the increase of the actual current of the motor, the motor is stopped when the actual current of the motor is equal to or larger than the torque control current, the reference protection current value is used as the reference, the torque control current value is changed in real time by taking the ratio of the actual voltage to the rated voltage as a coefficient, the torque control current value is reduced along with the reduction of the actual voltage, when the battery is in a full-power state and can output the rated voltage, the torque control current is equal to the reference protection current value, the motor can output the maximum torque, the battery can always exert the maximum performance according to the actual voltage, and the motor.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is a graph of torque control current versus actual battery voltage for a prior art scheme;
FIG. 2 is a graph of actual current of a motor corresponding to each torque gear during soft start in a conventional scheme;
FIG. 3 is a flow chart of a first embodiment of the present invention;
FIG. 4 is a graph of torque control current versus actual battery voltage for the first embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a power tool according to a first embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an electric tool according to a second embodiment of the present invention.
The meaning of the reference symbols in the figures:
ir, actual current I, reference protection current value Is, torque control current Vb, actual voltage V, rated voltage 100, battery 11, battery unit 12, temperature detection module 13, battery controller B +, battery positive terminal B-, battery negative terminal ID, battery communication terminal B ' +, tool positive terminal B ' -, tool negative terminal ID ', tool communication terminal 200, control circuit 21, voltage detection module 22, current detection module 23, controller 231, memory 24, torque switch 25, switch tube 3, motor
[ detailed description ] embodiments
The present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, in the prior art, the torque control current is a set value, the actual current of the control motor does not exceed the torque control current, the torque control current has no correlation with the actual voltage of the battery, and does not change with the change of the actual voltage, and generally, the torque control current corresponding to the highest-gear torque remains a certain margin compared with the maximum current that can be provided by the battery, so that the electric tool cannot output a larger torque even when the battery is in a full-charge state and can output a rated voltage, and the battery cannot exert the maximum performance. Referring to fig. 2, taking the example that the electric tool is powered by a battery with a rated voltage of 4.2V, in the prior art, the torque control current of the highest torque is set to be a fixed constant 20 amperes, so that even if the battery is fully charged and can output a rated voltage of 4.2V, the electric tool cannot output a higher torque.
The first embodiment:
referring to fig. 3 to 5, a torque control method of an electric tool according to a first embodiment of the present invention includes a motor 3 outputting two or more speeds of torque, a control circuit 200 having a controller 23, and a battery 100 having a rated voltage V, wherein the controller 23 includes a memory 231, in the present embodiment, an electric screwdriver outputting three speeds of torque is taken as an example, and the battery 100 has a rated voltage V of 4.2VVoltage, the locked-rotor current of the electric screwdriver is 28A when the battery 100 outputs 4.2V rated voltage to supply power to the electric screwdriver, a motor shaft of the motor is fixed and does not rotate, the battery supplies power to the electric tool, the current of the motor detected at the moment is the locked-rotor current, in other embodiments, the locked-rotor current can be other electric tools, the battery has other rated voltage, and the locked-rotor current detects different values according to different rated voltage, the electric tool and the motor; referring to fig. 3, the torque control method for the electric tool includes the following steps: s1 starting the motor 3; s2 detecting an actual voltage Vb of the battery 100; s3, the controller 23 is provided with a reference protection current value I, the reference protection current value I is stored in the memory 231, the reference protection current value I is set as a locked-rotor current when the motor 3 is powered by a rated voltage of 4.2V, I is 28A, and an error protection value is provided for further protecting the locked-rotor current of the electric tool; setting the reference protection current value I as a difference value between the locked rotor current and the error protection value, where the error protection value is set to 2 amperes to 3 amperes, the error protection value is set to 3 amperes in this embodiment, and the reference protection current value I is set as a difference value between the locked rotor current and the error protection value, and is 25A; s4, setting a torque control current Is corresponding to the highest gear torque, wherein the torque control current Is obtained by multiplying the ratio of the actual voltage Vb to the rated voltage V by the reference protection current value I,
s5 detecting the actual current Ir of the motor 3; s6, judging whether the actual current Ir Is equal to or larger than the torque control current Is, if the actual current Ir Is smaller than the torque control current Is, returning to the step S2, and if the actual current Ir Is equal to or larger than the torque control current Is, entering the step S6; s6, stopping the motor 3 when the actual current Ir Is equal to or greater than the torque control current Is.
Referring to fig. 4, when the actual current Ir Is larger, the torque output by the motor 3 Is larger, when the electric power tool Is set to the highest torque output, and the actual current Ir rises to be equal to or larger than the torque control current Is, the motor 3 Is stopped, the reference protection current value I Is used as the reference, the torque control current Is changed in real time by using the ratio of the actual voltage Vb to the rated voltage V as the coefficient, the torque control current Is decreases with the decrease of the actual voltage Vb, when the battery 100 Is in the full-charge state and can output the rated voltage V, the torque control current Is equal to the reference protection current value I, that Is, equal to the difference between the locked rotor current and the error protection value, the motor 3 can output the maximum torque, and thus the battery 100 can always exert the maximum performance according to the actual voltage Vb, the motor 3 can output a higher torque.
The battery 100 is fixedly mounted on the power tool or can be detached from the power tool; the battery 100 includes more than one battery unit 11, each battery unit 11 has an individual rated voltage, when the battery 100 has more than two battery units 11, the battery units 11 are connected in parallel or in series or in combination of series connection and parallel connection to output the rated total voltage, in the embodiment, the battery 100 has one battery unit 11, the individual rated voltage of the battery unit 11 is 4.2V, and the rated total voltage output by the battery 100 is 4.2V. In step S2, the method of detection of the actual voltage Vb may be to detect the actual total voltage of the battery 100; the torque control current Is the ratio of the actual total voltage to the rated total voltage multiplied by the reference protection current value I.
The invention provides a nonvolatile readable memory, the steps executed in the electric tool torque control method can be stored in the nonvolatile readable memory, and the executed steps can be called and executed by a processor, and the processor can be a controller containing a logic operation unit.
The first embodiment of the present invention also provides an electric tool to which the above-described electric tool torque control method is applied, which includes, as shown in fig. 5, a motor 3, a control circuit 200, and a battery 100 having a rated voltage V, the control circuit including a controller 23 having a memory 231,the motor 3 outputs more than two levels of torque, the controller 23 is electrically connected with a torque switch 24, the torque switch 24 switches the torque of each level output by the motor 3, taking the electric tool as an electric screwdriver as an example, the electric screwdriver outputs three levels of torque, and the rated voltage of the battery 100 is 4.2V; the controller 23 is electrically connected to a voltage detection module 21 and a current detection module 22, the voltage detection module 21 detects an actual voltage Vb of the battery 100 and outputs the actual voltage Vb to the controller 23, and the current detection module 22 detects an actual current Ir of the motor 3 and outputs the actual current Ir to the controller 23; the controller 23 is provided with a reference protection current value I, which is stored in the memory 231; the controller 23 sets a torque control current Is corresponding to the highest-gear torque, the torque control current Is set to be the ratio of the actual voltage Vb to the rated voltage V multiplied by the reference protection current value I,
when the controller 23 detects that the actual current Ir Is equal to or greater than the torque control current Is, the motor 3 Is controlled to stop; the controller 23 is electrically connected with a switch tube 25, the switch tube 25 is connected with the motor 3 for starting, and the switch tube 25 is disconnected with the motor 3 for stopping.
The controller 23 sets the reference protection current value I as a locked-rotor current when the battery 100 outputs a rated voltage V, fixes a motor shaft of the motor so that the motor shaft does not rotate, supplies power to the electric tool, and at this time, the current detected by the motor is the locked-rotor current, in this embodiment, the locked-rotor current is the locked-rotor current when the battery 100 outputs a rated voltage of 4.2V as the power supplied by the electric tool, and is 28A, in other embodiments, the locked-rotor current may be other electric tools, the battery has other rated voltages, and the locked-rotor current detects different values according to different rated voltages, the electric tool, and the motor. In order to further protect the electric tool, an error protection value is set for the locked-rotor current, the controller 23 sets the reference protection current value I as a difference between the locked-rotor current and the error protection value, the error protection value is set to be 2 amperes to 3 amperes, in this embodiment, the error protection value is set to be 3 amperes, and the reference protection current value I is set as a difference between the locked-rotor current and the error protection value, and is 25A.
The battery 100 is fixedly mounted on the power tool or can be detached from the power tool; the battery 100 comprises more than one battery unit 11, each battery unit 11 has an individual rated voltage, when the battery 100 has more than two battery units 11, the battery units 11 are connected in parallel or in series or in combination of series connection and parallel connection to output rated total voltage, in the embodiment, the battery 100 has one battery unit 11, the individual rated voltage of the battery unit 11 is 4.2V, the rated total voltage output by the battery 100 is 4.2V, and the actual total voltage of the battery 100 is equal to the actual total voltage of the battery units 11; the voltage detection module 21 detects an actual total voltage of the battery 100 and outputs the actual total voltage to the controller 23, and the controller 23 sets the torque control current Is to be a ratio of the actual total voltage to the rated total voltage multiplied by the reference protection current value I.
The electric tool Is set to be the highest-gear torque output, when the battery 100 Is in a full-charge state and can output a rated voltage V, the torque control current Is equal to a reference protection current value I, when the actual current Ir of the motor 3 Is equal to or larger than the torque control current Is, the controller 23 controls the motor 3 to stop, the motor 3 can output the maximum torque, the reference protection current value I Is used as a reference, the torque control current Is changed in real time by taking the ratio of the actual voltage Vb to the rated voltage V as a coefficient, the torque control current Is reduced along with the reduction of the actual voltage Vb, the battery 100 can always exert the maximum performance according to the actual voltage Vb, and the motor 3 can output higher torque.
The second embodiment:
as shown in fig. 6, the electric power tool torque control method according to the second embodiment of the present invention is different from the first embodiment in that the electric power tool torque control method further includes the steps of: detecting the actual temperature of the battery 100, comparing the actual temperature with a preset temperature value, and stopping the motor 3 when the actual temperature is higher than the preset temperature value; when the actual voltage Vb is lower than a preset undervoltage voltage, the motor 3 is stopped, so that the electric tool is protected when the temperature is over-high or under-voltage.
In the present embodiment, the battery 100 includes two or more battery cells 11, each of the battery cells 11 has an individual rated voltage, and the battery cells 11 output a rated total voltage either in parallel or in series or in a combination of series and parallel; the method of detecting the actual voltage Vb of the battery 100 may be to detect an actual total voltage of the battery 100, and the torque control current Is obtained by multiplying the reference protection current value I by a ratio of the actual total voltage to the rated total voltage. The method for detecting the actual voltage Vb of the battery 100 may also be to detect an individual actual voltage of the battery cell 11, where the torque control current Is a ratio of the individual actual voltage to the individual rated voltage multiplied by the reference protection current value I, and further, the individual actual voltage of each battery cell 11 may be detected, and an average actual voltage of the battery cell 11 Is calculated; the torque control current Is the ratio of the average actual voltage to the individual rated voltage multiplied by the reference protection current value I.
The second embodiment of the present invention also provides an electric tool to which the above-described electric tool torque control method is applied, which is different from the first embodiment in that the battery 100 includes a battery controller 13 and two or more battery cells 11 having individual rated voltages, and the battery 100 further includes a battery positive terminal B +, a battery negative terminal B-, and a battery communication terminal ID, which are connected to a tool positive terminal B ' +, a tool negative terminal B ' -and a tool communication terminal ID ' of the electric tool, respectively, as shown in fig. 6; the battery controller 13 is electrically connected to a temperature detection module 12, the temperature detection module 12 detects an actual temperature of the battery 100 and outputs the actual temperature to the battery controller 13, a preset temperature value is stored in the battery controller 13, when the battery controller 13 detects that the actual temperature is higher than the preset temperature value, an over-temperature signal is output to the controller 23 through the battery communication terminal ID, and the controller 23 controls the motor 3 to stop; the battery controller 13 stores a preset undervoltage, when the battery controller 13 detects that the actual voltage Vb is lower than the preset undervoltage, the battery controller 13 outputs an undervoltage signal to the controller 23 through the battery communication terminal ID, and the controller 23 controls the motor 3 to stop, so that the electric tool is protected when the actual voltage Vb is over-temperature or under-voltage.
A plurality of said battery cells 11 outputting a rated total voltage either in parallel or in series or in a combination of series and parallel; the battery controller 13 detects that the actual voltage Vb of the battery 100 is transmitted to the electric power tool. The battery controller 13 may detect an actual total voltage of the battery 100, and output the actual total voltage to the controller 23 through the battery communication terminal ID, and the torque control current Is the reference protection current value I multiplied by a ratio of the actual total voltage to the rated total voltage. Or the controller 23 may detect an individual actual voltage of the battery cell 11 and output the individual actual voltage to the controller 23 through the battery communication terminal ID, and the torque control current Is the reference protection current value I multiplied by a ratio of the individual actual voltage to the individual rated voltage. Further, the battery controller 13 may detect an individual actual voltage of each battery cell 11, calculate an average actual voltage of the battery cell 11, and output the average actual voltage to the controller 23 through the battery communication terminal ID, wherein the torque control current Is a ratio of the average actual voltage to the individual rated voltage multiplied by the reference protection current value I.
The present invention is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that there are numerous alternatives to the power tool torque control method and power tool of the present invention without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.
Claims (10)
1. A torque control method for an electric tool including a motor that outputs two or more speeds of torque, a control circuit having a controller, and a battery having a rated voltage, characterized by comprising the steps of: detecting an actual voltage of the battery; a reference protection current value is set in the controller; setting a torque control current corresponding to the highest gear torque, wherein the torque control current is the ratio of the actual voltage to the rated voltage multiplied by the reference protection current value; and detecting the actual current of the motor, and stopping the motor when the actual current is equal to or larger than the torque control current.
2. The electric tool torque control method according to claim 1, characterized in that: and setting the reference protection current value as locked rotor current, wherein the locked rotor current is the locked rotor current when the motor is powered by the rated voltage.
3. The electric tool torque control method according to claim 2, characterized in that: the locked rotor current is provided with an error protection value; and setting the reference protection current value as the difference value of the locked rotor current and the error protection value.
4. The electric tool torque control method according to any one of claims 1 to 3, characterized in that: the battery comprises more than one battery unit and has rated total voltage, and the detection of the actual voltage of the battery comprises the detection of the actual total voltage of the battery; the torque control current is the ratio of the actual total voltage to the rated total voltage multiplied by the reference protection current value.
5. The electric tool torque control method according to any one of claims 1 to 3, characterized in that: the battery comprises more than one battery unit with individual rated voltage, and the detection of the actual voltage of the battery comprises the detection of the individual actual voltage of the battery unit; the torque control current is the ratio of the individual actual voltage to the individual rated voltage multiplied by the reference protection current value.
6. The electric tool torque control method according to any one of claims 1 to 3, characterized in that: the battery comprises more than one battery unit with individual rated voltage, the detection of the actual voltage of the battery comprises the detection of the individual actual voltage of each battery unit, and the calculation of the average actual voltage of the battery units; the torque control current is the ratio of the average actual voltage to the individual rated voltage multiplied by the reference protection current value.
7. The electric tool torque control method according to any one of claims 1 to 3, characterized by further comprising the steps of: detecting the actual temperature of the battery, comparing the actual temperature with a preset temperature value, and stopping the motor when the actual temperature is higher than the preset temperature value; and stopping the motor when the actual voltage is lower than the preset undervoltage voltage.
8. An electric power tool includes a motor, a control circuit, and a battery having a rated voltage; the control circuit comprises a controller, the motor outputs torque of more than two gears, and the control circuit is characterized in that: the controller is electrically connected with a voltage detection module for detecting the actual voltage of the battery and a current detection module for detecting the actual current of the motor; the controller is provided with a reference protection current value and a torque control current corresponding to the highest gear torque, and the torque control current is set to be the ratio of the actual voltage to the rated voltage multiplied by the reference protection current value; and the controller detects that the actual current is equal to or larger than the torque control current and controls the motor to stop.
9. The power tool of claim 8, wherein: the controller comprises a memory, wherein locked rotor current is stored in the memory, the locked rotor current is the locked rotor current when the motor supplies power at the rated voltage, and the locked rotor current is provided with an error protection value; and the controller sets the reference protection current value as the difference value between the locked rotor current and the error protection value.
10. The electric power tool according to claim 8 or 9, characterized in that: the battery includes one or more battery cells having individual rated voltages and a battery controller, and the battery includes a battery positive terminal, a battery negative terminal, and a battery communication terminal, the battery controller detecting an actual voltage of the battery transmitted to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011057951.4A CN112117940A (en) | 2020-09-30 | 2020-09-30 | Electric tool torque control method and electric tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011057951.4A CN112117940A (en) | 2020-09-30 | 2020-09-30 | Electric tool torque control method and electric tool |
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| CN112117940A true CN112117940A (en) | 2020-12-22 |
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| CN202011057951.4A Pending CN112117940A (en) | 2020-09-30 | 2020-09-30 | Electric tool torque control method and electric tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031476A (en) * | 2021-03-01 | 2021-06-25 | 上海器外文化科技有限公司 | Control method and device for electric tool, electric tool and storage medium |
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2020
- 2020-09-30 CN CN202011057951.4A patent/CN112117940A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031476A (en) * | 2021-03-01 | 2021-06-25 | 上海器外文化科技有限公司 | Control method and device for electric tool, electric tool and storage medium |
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