CN114415571A - Control method for anti-stalling of brushless garden tool - Google Patents
Control method for anti-stalling of brushless garden tool Download PDFInfo
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Abstract
The invention discloses a control method for preventing rotation blockage of a brushless garden tool, which is based on a brushless controller for preventing rotation blockage, wherein the brushless controller comprises a power supply module, a switch module, a motor driving module, a main control MCU (microprogrammed control unit), a voltage detection module, a temperature detection module and a current detection module, the main control MCU detects the voltage of a battery pack through Vsen and BV points, detects the current of the brushless controller through Isen, detects the three-phase reaction electromotive force of the brushless motor through P, calculates the current rotating speed of the motor, drives a DEIVER to operate the brushless motor through D, and intelligently judges the current working condition, whether rotation blockage is performed or not and the degree of rotation blockage pair through the current of the controller, the power supply voltage of the battery pack and the change curve of the rotating speed of the brushless motor received by the MCU. And then effectual solution is on the market to the brushless motor stalling after the problem that the inefficiency in the starting scheme was taken trouble, high-efficient, stable, user experience feels good.
Description
Technical Field
The invention relates to the technical field of brushless motor control, in particular to a control method for preventing a brushless garden tool from stalling.
Background
With the gradual maturity of brushless motor technology, a large number of brushless garden electric tools appear on the market now. While the brushless garden electric tool can often touch objects such as dense grass, dry branches and stones during normal operation. This is the main culprit of causing the brushless motor to block the rotation.
Therefore, in order to prevent the brushless motor from stalling, the current of the brushless motor is detected on the market, the motor is stopped when the current is detected to be overlarge, and then objects such as weeds, dry branches, branches which are too thick and hard are removed manually. However, such a solution is not efficient, and there is a problem that the user repeatedly operates the operation position of the machine by manually restarting the machine after the user has to remove the object difficult to operate by himself, which causes a lack of safety and a poor experience.
Disclosure of Invention
The invention provides a control method for preventing a brushless garden tool from stalling, which can solve the technical problems of low efficiency and trouble of a brushless motor stalling post-processing scheme in the market.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for preventing the brushless garden tool from blocking the rotation is based on a brushless controller for preventing the rotation, the brushless controller comprises a power supply module, a switch module, a motor driving module, a main control MCU, a voltage detection module, a temperature detection module and a current detection module,
the power supply module is connected with the temperature detection module,
the switch module is respectively connected with the voltage detection module, the motor driving module and an NC1 pin of the main control MCU,
the voltage detection module is respectively connected with a Vsen pin and a BV pin of the main control MCU,
the motor driving module is respectively connected with the current detection module and the pin D and the pin P of the main control MCU,
the temperature detection module is respectively connected with a BS pin and a PT1 pin of the main control MCU.
The current detection module is connected with an Isen pin of the master control MCU;
main control MCU detects battery package voltage through Vsen and BV point, detect the electric current size of brushless controller operation through Isen, detect brushless motor's three-phase reaction electromotive force through P, thereby calculate motor speed at that time, utilize D drive DEIVER to operate brushless motor, the electric current of the controller that receives through MCU, battery package supply voltage, the change curve of brushless motor speed, carry out intelligent judgement operating conditions at that time, whether locked rotor has carried out, and the degree that the locked rotor was right.
Further, judging that the brushless controller entering the locked rotor can perform motor shutdown operation through the change curve, and then controlling the brushless controller to perform reverse restart operation for multiple times of automatic restart to remove the locked rotor foreign matters and weeds;
when carrying out this operation, the change curve of brushless controller still can pass through the current-voltage rotational speed carries out intelligent analysis, if stifled commentaries on classics thing is too difficult to be got rid of, and brushless controller can learn through the analysis curve, carries out the action that the motor stopped, lets artifical safety get rid of, if ordinary stifled commentaries on classics, then prevents through intelligence that stifled commentaries on classics action carries out getting rid of foreign matter.
Furthermore, the control method comprises the following specific steps,
(1) starting up
The method comprises the steps that a controller switch is pressed down to carry out starting operation, in the process, an MCU detects whether the power supply voltage of a battery pack is normal or not through a voltage detection module, a current detection module detects whether the current of a controller is overlarge or not, a temperature detection module detects whether the temperature of the battery pack is normal or not, the normal detection and the abnormality are respectively provided for an MCU flag bit, when the voltage, the temperature and the current all obtain normal flag bits, the next step of motor operation is carried out, otherwise, the controller buzzes for alarming, and the motor does not operate;
(2) operation of the electric machine
When the motor runs, the voltage and current temperature detection is still continuously carried out, when each abnormal mark position appears, the motor is stopped, and the reversing interruption detection is carried out;
(3) locked-rotor counter plus 1
When the system is initialized, the locked-rotor counter is 0, and the locked-rotor counter is increased by 1 by doing so.
(4) Entering commutation interruption
Detecting three-phase commutation of the motor, judging whether commutation interruption is carried out, if the commutation interruption is carried out, representing that the motor works normally, and if the commutation interruption is not carried out, reducing the voltage and increasing the current, representing that the motor stalls;
(5) locked-rotor counter clear 0
When the phase change interruption is started, the motor works normally, and the locked-rotor counter is cleared by 0;
(6) the locked-rotor counter is more than 2
In order to enter commutation interruption, judging whether a locked-rotor counter is larger than 2, and after the motor is locked, carrying out 2 times of motor operation to achieve the step, wherein the operation is to prevent small locked-rotor from frequently promoting an anti-locked-rotor function, and the normal small locked-rotor can be removed after 2 times of normal operation;
(7) switch release
Whether the switch is loosened or not is judged, and the step is carried out to judge whether an operator needs to stop the machine, automatically clear the locked rotor or carry out the locked rotor prevention operation.
Further, the control method further includes the step of,
(8) automatic restart
Detecting that the switch is not loosened, and repeatedly restarting the motor by the controller; so as to facilitate the opening of the blockage, recover the normal work, and lead the motor to rotate reversely in a small amplitude and then rotate positively in the restarting process; in the process, the detection of the power supply voltage of the battery pack, the running current and the three-phase signal of the motor can be carried out, and the difficulty of clearing the blockage can be judged through the detection.
Further, the control method further includes the step of,
(9) locked-rotor counter greater than 7 and stubborn locked-rotor flag bit
When the locked rotor counter is larger than 7 or the position of the stubborn locked rotor mark is 1, next stopping operation is carried out; the locked-rotor counter is more than 7, which represents that the controller has performed 5 times of locked-rotor prevention operation and the locked-rotor is not released; judging that the locked-rotor operation cannot be released even if the locked-rotor operation is carried out for multiple times, stopping the machine, and manually removing the blockage by an operator; and in the process of detecting the power supply voltage of the battery pack, the running current and the three-phase signals of the motor, comprehensively judging the curves of the three rules, and when any value of the three curves exceeds a set safe working value, if the current exceeds a set value, enabling the stubborn locked rotor mark position 1 to perform the 10 th step of shutdown operation.
(10) Shutdown
When the switch is loosened, or the locked-rotor counter is larger than 7, or the position is stubborn to mark 1, the machine is stopped, and the motor is stopped.
Further, the switch module comprises a P + port, a TP + port, an ST-port, a BS + port, a first switch SW1, a second switch SW2, a resistor R1, a resistor R2, and a diode D1,
the positive electrode of the upper battery pack is connected with the P + port,
the P + port is respectively connected with the TP + port, the voltage detection module 3 and the motor drive module 4,
the TP + port is respectively connected with the first switch SW1 and the second switch SW2,
the first switch SW1 is connected to the anode of diode D1 through the ST-port,
the cathode of the diode D1 is connected to the voltage detection module 3,
the second switch SW2 is connected to one end of the resistor R1 through the BS + port,
the other end of the resistor R1 is connected with the ground GND through a resistor R2,
the other path of the other end of the resistor R1 is connected with an NC1 pin of the master control MCU.
Further, the voltage detection module comprises a third switch SW3, a diode D2, a resistor R10, a resistor R11, a resistor R12, a resistor R13 and a power conversion module,
third switch SW3 one end is connected with the P + port, the first way of third switch SW3 other end with diode D2's negative pole is connected, diode D2's positive pole with diode D1's negative pole is connected, and the second way of third switch SW3 other end passes through power conversion module is connected with power VCC, and the third way of third switch SW3 other end is connected with resistance R12's one end, and the way of resistance R12 other end is connected with main control MCU's BV pin, and the other way of resistance R12 other end is connected with ground GND through resistance R13.
Further, the temperature detection module includes a PT1 port, the PT1 of the Battery1 pack is connected to one end of the resistor R4, one path of the other end of the resistor R4 is connected to ground GND through a resistor R5, and the other path of the other end of the resistor R1 is connected to a PT1 pin of the main control MCU.
Further, the current detection module includes operational amplifier U1, resistance R9, resistance R3, operational amplifier U1's inverting input all the way with motor drive module 4 connects, and another way of operational amplifier U1's inverting input is connected with ground GND through resistance R9, operational amplifier U1's output is connected with main control MCU's Isen pin all the way, and another way of operational amplifier U1's output is connected with operational amplifier U1's positive phase input through resistance R3.
According to the technical scheme, the control method for preventing the brushless garden tool from being locked is used for intelligently controlling the brushless controller by utilizing the change curve formed by the voltage provided by the battery pack and the rotating speed of the brushless motor when the detected current of the controller works is utilized, and the brushless controller is locked, reversely started, reversely cut sundries and repeatedly reversely started for many times, so that the problems of low efficiency and trouble in the starting scheme after the brushless motor is locked in the market are effectively solved, and the control method is efficient, stable and good in user experience.
Drawings
FIG. 1 is a system block diagram of an anti-spin-up circuit of the present invention;
fig. 2 is a flow chart of the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
As shown in fig. 1, the control method for preventing the lock-up of the brushless garden tool according to this embodiment is based on a brushless controller for preventing the lock-up, which includes a power supply module 1, a switch module 2, a motor driving module 4, a main control MCU, a voltage detection module 3, a temperature detection module 5, and a current detection module 6,
the power supply module 1 is connected with the temperature detection module 5,
the switch module 2 is respectively connected with the voltage detection module 3, the motor driving module 4 and an NC1 pin of the main control MCU,
the voltage detection module 3 is respectively connected with a Vsen pin and a BV pin of the main control MCU,
the motor driving module 4 is respectively connected with the current detection module 6, a pin D and a pin P of the master control MCU,
the temperature detection module 5 is respectively connected with a BS pin and a PT1 pin of the main control MCU.
The current detection module 6 is connected with an Isen pin of the master control MCU.
Wherein the content of the first and second substances,
the switch module 2 includes a P + port, a TP + port, an ST-port, a BS + port, a first switch SW1, a second switch SW2, a resistor R1, a resistor R2, and a diode D1,
the positive electrode of the upper battery pack 11 is connected with the P + port,
the P + port is respectively connected with the TP + port, the voltage detection module 3 and the motor drive module 4,
the TP + port is respectively connected with the first switch SW1 and the second switch SW2,
the first switch SW1 is connected to the anode of diode D1 through the ST-port,
the cathode of the diode D1 is connected to the voltage detection module 3,
the second switch SW2 is connected to one end of the resistor R1 through the BS + port,
the other end of the resistor R1 is connected with the ground GND through a resistor R2,
the other path of the other end of the resistor R1 is connected with an NC1 pin of the master control MCU.
The voltage detection module 3 comprises a third switch SW3, a diode D2, a resistor R10, a resistor R11, a resistor R12, a resistor R13 and a power conversion module,
third switch SW3 one end is connected with the P + port, the first way of third switch SW3 other end with diode D2's negative pole is connected, diode D2's positive pole with diode D1's negative pole is connected, and the second way of third switch SW3 other end passes through power conversion module is connected with power VCC, and the third way of third switch SW3 other end is connected with resistance R12's one end, and the way of resistance R12 other end is connected with main control MCU's BV pin, and the other way of resistance R12 other end is connected with ground GND through resistance R13.
The temperature detection module 5 comprises a PT1 port, the PT1 of the Battery1 pack is connected with one end of the resistor R4, one path of the other end of the resistor R4 is connected with the ground GND through a resistor R5, and the other path of the other end of the resistor R1 is connected with a PT1 pin of the main control MCU.
The current detection module 6 comprises an operational amplifier U1, a resistor R9 and a resistor R3, wherein one path of the inverting input end of the operational amplifier U1 is connected with the motor driving module 4, the other path of the inverting input end of the operational amplifier U1 is connected with the ground GND through a resistor R9, one path of the output end of the operational amplifier U1 is connected with the Isen pin of the main control MCU, and the other path of the output end of the operational amplifier U1 is connected with the positive phase input end of the operational amplifier U1 through a resistor R3.
MCU detects battery package voltage through Vsen and BV point, detects the electric current size of brushless controller operation through Isen, detects brushless motor's three-phase reaction electromotive force through P to calculate the current rotational speed of motor, utilize D drive DEIVER to operate brushless motor. The current of controller, battery package supply voltage, the change curve of brushless motor rotational speed that receive through MCU carry out intelligent judgement operating condition at that time, whether carried out the locked rotor to and the degree that the locked rotor was right. The brushless controller which enters the locked rotor is judged to carry out motor shutdown operation through the change curve, and then the brushless controller can control the brushless motor to carry out reverse restart operation for multiple times of automatic restart to remove the locked rotor foreign matters and weeds. When the operation is carried out, the brushless controller still can carry out intelligent analysis through the change curve of the current, the voltage and the rotating speed. If stifled commentaries on classics thing is crossed difficult getting rid of, can injure the motor by force, brushless controller can learn through the analysis curve, carries out the action that the motor stopped, lets artifical safety get rid of. And ordinary stifled commentaries on classics all can prevent stifled commentaries on classics action through intelligence to the high efficiency carries out the getting rid of foreign matter.
Specifically, the control process of the invention is as follows:
(1) starting up
And pressing a controller switch to start, wherein the MCU detects whether the power supply voltage of the battery pack is normal or not through the voltage detection module in the process. And the current detection module is used for detecting whether the current of the controller is overlarge or not. And the temperature detection module is used for detecting whether the temperature of the battery pack is normal or not. And when the normal detection and the abnormal detection are detected, the MCU mark positions are respectively given, and when the voltage, the temperature and the current all obtain the normal mark positions, the next step of motor operation is carried out. Otherwise, the controller buzzes to alarm, and the motor does not run.
(2) Operation of the electric machine
When the motor runs, the voltage and current temperature detection is still continuously carried out, and when each abnormal mark position 1 appears, the motor is stopped. And commutation break detection is performed.
(3) Locked-rotor counter plus 1
When the system is initialized, the locked-rotor counter is 0, and the locked-rotor counter is increased by 1 by doing so.
(4) Entering commutation interruption
And detecting the three-phase commutation of the motor, and judging whether to enter commutation interruption or not. And if the motor enters the phase change interruption state, the motor works normally, the phase change interruption state is not entered, the voltage is reduced, the current is increased, and the motor is blocked.
(5) Locked-rotor counter clear 0
And (4) entering phase change interruption, normally working the motor and clearing the locked-rotor counter to 0. Avoiding the third step of adding 1 to the locked-rotor counter all the time and entering the 6 th step
(6) The locked-rotor counter is more than 2
And judging whether the locked-rotor counter is larger than 2 or not in order to enter the phase change interruption. When the motor is locked, the motor can be operated for 2 times, and the step can be reached. The operation is to prevent the small locked rotor from frequently triggering the locked rotor prevention function, and the normal small locked rotor can be cleared after 2 times of normal operation.
(7) Switch release
And judging whether the switch is loosened. This step is performed to determine whether the operator is to stop the machine, to self-clean the locked rotor, or to perform an anti-locked rotor operation.
(8) Automatic restart
And detecting that the switch is not released, and repeatedly restarting the motor by a controller. So as to be convenient for breaking away the blockage and recovering the normal work. In the process of restarting, the motor can rotate reversely in a small amplitude first and then rotate forwards. This allows for more effective cleaning of the blockage. In the process, the detection of the power supply voltage, the running current and the three-phase signals of the motor of the battery pack can be carried out. Through the difficulty of judging the clearance of the blockage, the more difficult the clearance, the larger the current can be pulled, the lower the voltage can be pressed, and the larger the three-phase voltage fluctuation can be.
(9) Locked-rotor counter greater than 7 and stubborn locked-rotor flag bit
And when the locked rotor counter is larger than 7 or the position of the stubborn locked rotor mark is 1, performing the 10 th step of stopping operation. The locked-rotor counter is larger than 7, which represents that the controller has performed 5 times of locked-rotor prevention operation and the locked-rotor is not released. And if the blockage operation cannot be relieved after the blockage preventing operation is carried out for a plurality of times, stopping the machine, and manually removing the blockage by an operator. The method is used for detecting the power supply voltage of the battery pack, the running current and the three-phase signals of the motor. And (4) comprehensively judging the curves of the three rules, and if any value of the three curves exceeds a set safe working value, if the current exceeds a set value, the stubborn locked rotor mark position 1 is enabled to carry out the 10 th shutdown operation. This operation is intended to protect the machine from damage caused by a forced restart of the machine. The intelligent and non-rigid anti-stalling operation is realized.
(10) Shutdown
When the switch is released, or the locked-rotor counter is larger than 7, or the position is stubborn to mark 1, the machine is stopped. The motor is stopped to rotate, so that an operator can conveniently clear away the blockage, safety is realized, and the machine is prevented from being started to hurt the operator.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A control method for preventing the brushless garden tool from blocking the rotation is based on a brushless controller for preventing the rotation, the brushless controller comprises a power supply module (1), a switch module (2), a motor driving module (4), a main control MCU, a voltage detection module (3), a temperature detection module (5) and a current detection module (6),
the power supply module (1) is connected with the temperature detection module (5),
the switch module (2) is respectively connected with the voltage detection module (3), the motor drive module (4) and an NC1 pin of the main control MCU,
the voltage detection module (3) is respectively connected with a Vsen pin and a BV pin of the main control MCU,
the motor driving module (4) is respectively connected with the current detection module (6), a D pin and a P pin of the master control MCU,
and the temperature detection module (5) is respectively connected with a BS pin and a PT1 pin of the master control MCU.
The current detection module (6) is connected with an Isen pin of the master control MCU;
the method is characterized in that:
main control MCU detects battery package voltage through Vsen and BV point, detect the electric current size of brushless controller operation through Isen, detect brushless motor's three-phase reaction electromotive force through P, thereby calculate motor speed at that time, utilize D drive DEIVER to operate brushless motor, the electric current of the controller that receives through MCU, battery package supply voltage, the change curve of brushless motor speed, carry out intelligent judgement operating conditions at that time, whether locked rotor has carried out, and the degree that the locked rotor was right.
2. The control method for anti-stalling of the brushless garden tool according to claim 1, wherein: judging that the brushless controller entering the locked rotor can carry out motor shutdown operation through the change curve, and then controlling the brushless controller to carry out reverse restart operation for multiple times of automatic restart to remove the locked rotor foreign matters and weeds;
when carrying out this operation, the change curve of brushless controller still can pass through the current-voltage rotational speed carries out intelligent analysis, if stifled commentaries on classics thing is too difficult to be got rid of, and brushless controller can learn through the analysis curve, carries out the action that the motor stopped, lets artifical safety get rid of, if ordinary stifled commentaries on classics, then prevents through intelligence that stifled commentaries on classics action carries out getting rid of foreign matter.
3. The control method for anti-stalling of the brushless garden tool according to claim 2, wherein: the control method comprises the following specific steps of,
(1) starting up
The method comprises the steps that a controller switch is pressed down to carry out starting operation, in the process, an MCU detects whether the power supply voltage of a battery pack is normal or not through a voltage detection module, a current detection module detects whether the current of a controller is overlarge or not, a temperature detection module detects whether the temperature of the battery pack is normal or not, the normal detection and the abnormality are respectively provided for an MCU flag bit, when the voltage, the temperature and the current all obtain normal flag bits, the next step of motor operation is carried out, otherwise, the controller buzzes for alarming, and the motor does not operate;
(2) operation of the electric machine
When the motor runs, the voltage and current temperature detection is still continuously carried out, when each abnormal mark position appears, the motor is stopped, and the reversing interruption detection is carried out;
(3) locked-rotor counter plus 1
When the system is initialized, the locked-rotor counter is 0, and the locked-rotor counter is increased by 1 by doing so.
(4) Entering commutation interruption
Detecting three-phase commutation of the motor, judging whether commutation interruption is carried out, if the commutation interruption is carried out, representing that the motor works normally, and if the commutation interruption is not carried out, reducing the voltage and increasing the current, representing that the motor stalls;
(5) locked-rotor counter clear 0
When the phase change interruption is started, the motor works normally, and the locked-rotor counter is cleared by 0;
(6) the locked-rotor counter is more than 2
In order to enter commutation interruption, judging whether a locked-rotor counter is larger than 2, and after the motor is locked, carrying out 2 times of motor operation to achieve the step, wherein the operation is to prevent small locked-rotor from frequently promoting an anti-locked-rotor function, and the normal small locked-rotor can be removed after 2 times of normal operation;
(7) switch release
Whether the switch is loosened or not is judged, and the step is carried out to judge whether an operator needs to stop the machine, automatically clear the locked rotor or carry out the locked rotor prevention operation.
4. The control method for anti-stalling of the brushless garden tool according to claim 3, wherein: the control method further comprises the step of,
(8) automatic restart
Detecting that the switch is not loosened, and repeatedly restarting the motor by the controller; so as to facilitate the opening of the blockage, recover the normal work, and lead the motor to rotate reversely in a small amplitude and then rotate positively in the restarting process; in the process, the detection of the power supply voltage of the battery pack, the running current and the three-phase signal of the motor can be carried out, and the difficulty of clearing the blockage can be judged through the detection.
5. The control method for anti-stalling of the brushless garden tool according to claim 4, wherein: the control method further comprises the step of,
(9) locked-rotor counter greater than 7 and stubborn locked-rotor flag bit
When the locked rotor counter is larger than 7 or the position of the stubborn locked rotor mark is 1, next stopping operation is carried out; the locked-rotor counter is more than 7, which represents that the controller has performed 5 times of locked-rotor prevention operation and the locked-rotor is not released; judging that the locked-rotor operation cannot be released even if the locked-rotor operation is carried out for multiple times, stopping the machine, and manually removing the blockage by an operator; and in the process of detecting the power supply voltage of the battery pack, the running current and the three-phase signals of the motor, comprehensively judging the curves of the three rules, and when any value of the three curves exceeds a set safe working value, if the current exceeds a set value, enabling the stubborn locked rotor mark position 1 to perform the 10 th step of shutdown operation.
(10) Shutdown
When the switch is loosened, or the locked-rotor counter is larger than 7, or the position is stubborn to mark 1, the machine is stopped, and the motor is stopped.
6. The control method for anti-stalling of the brushless garden tool according to claim 2, wherein: the switch module (2) comprises a P + port, a TP + port, an ST-port, a BS + port, a first switch SW1, a second switch SW2, a resistor R1, a resistor R2 and a diode D1,
the positive electrode of the upper battery pack (11) is connected with the P + port,
the P + port is respectively connected with the TP + port, the voltage detection module 3 and the motor drive module 4,
the TP + port is respectively connected with the first switch SW1 and the second switch SW2,
the first switch SW1 is connected to the anode of diode D1 through the ST-port,
the cathode of the diode D1 is connected to the voltage detection module 3,
the second switch SW2 is connected to one end of the resistor R1 through the BS + port,
the other end of the resistor R1 is connected with the ground GND through a resistor R2,
the other path of the other end of the resistor R1 is connected with an NC1 pin of the master control MCU.
7. The control method for anti-stalling of the brushless garden tool according to claim 6, wherein: the voltage detection module (3) comprises a third switch SW3, a diode D2, a resistor R10, a resistor R11, a resistor R12, a resistor R13 and a power conversion module,
third switch SW3 one end is connected with the P + port, the first way of third switch SW3 other end with diode D2's negative pole is connected, diode D2's positive pole with diode D1's negative pole is connected, and the second way of third switch SW3 other end passes through power conversion module is connected with power VCC, and the third way of third switch SW3 other end is connected with resistance R12's one end, and the way of resistance R12 other end is connected with main control MCU's BV pin, and the other way of resistance R12 other end is connected with ground GND through resistance R13.
8. The control method for anti-stalling of the brushless garden tool according to claim 7, wherein: the temperature detection module (5) comprises a PT1 port, the PT1 of the Battery1 pack is connected with one end of the resistor R4, one path of the other end of the resistor R4 is connected with the ground GND through the resistor R5, and the other path of the other end of the resistor R1 is connected with a PT1 pin of the main control MCU.
9. The control method for anti-stalling of the brushless garden tool according to claim 8, wherein: the current detection module (6) comprises an operational amplifier U1, a resistor R9 and a resistor R3, one way of inverting input end of the operational amplifier U1 is connected with the motor driving module 4, the other way of inverting input end of the operational amplifier U1 is connected with the ground GND through a resistor R9, one way of output end of the operational amplifier U1 is connected with an Isen pin of the main control MCU, and the other way of output end of the operational amplifier U1 is connected with a positive phase input end of the operational amplifier U1 through a resistor R3.
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