CN109656156A - Electric tool starts control method and device - Google Patents
Electric tool starts control method and device Download PDFInfo
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- CN109656156A CN109656156A CN201710947237.4A CN201710947237A CN109656156A CN 109656156 A CN109656156 A CN 109656156A CN 201710947237 A CN201710947237 A CN 201710947237A CN 109656156 A CN109656156 A CN 109656156A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The present invention relates to a kind of electric tools to start control method and device, after electric tool powers on, the driving circuit input detection signal of motor into electric tool, to detect the motor with the presence or absence of abnormal according to the electric signal of the motor output described after responding the detection signal；When judging that the motor does not occur abnormal, Xiang Suoshu driving circuit inputs the enabling signal, is normally started with controlling the electric tool.Above-mentioned electric tool starting control method and device do not use fuse additionally, after being powered on every time after electric tool can normal use, thus the defect that can not be continued to use after being powered on after electric tool after overcoming blown fuse.
Description
Technical field
The present invention relates to power tools technology fields, start control method and device more particularly to a kind of electric tool.
Background technique
With the development of electronic technology, electric tool is more and more widely used, and electric tool is broadly divided into gold
Belong to cutting electric tool, grinds electric tool, assembling electric tool and railway power supply power driven tools.
Fuse is generallyd use before electric tool (such as hair dryer) starting to examine to the exception of electric tool
It surveys.However this traditional detection mode is due to joined fuse, not only occupies the space in electric tool, cost compared with
Height, and fuse can not voluntarily restore if fusing, so that fuse makes after can not powering on after electric tool
With.
Summary of the invention
Based on this, it is necessary to be powered on after electric tool after blown fuse for how to overcome in conventional power tool
After the problem of can not continuing to use, a kind of electric tool starting control method and device are provided.
A kind of electric tool starting control method, comprising:
After electric tool powers on, into electric tool, the driving circuit input detection signal of motor, is being responded with basis
The electric signal of the motor output whether there is exception to detect the motor after the detection signal；
When judging that the motor does not occur abnormal, Xiang Suoshu driving circuit inputs enabling signal, described electronic to control
Tool normally starts.
The exception includes electric motor short circuit in one of the embodiments,；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, according in the response detection signal
The electric signal of the motor output includes: afterwards to detect the motor with the presence or absence of abnormal step
First detection signal is inputted to the driving circuit, and obtains the motor and responds the first detection signal output
The first electric signal；
Judge whether first electric signal is less than first threshold, there is no short circuits if so, determining the motor, no
Then, determine that short circuit has occurred in the motor.
It is utilized described in the current sensor acquisition being electrically connected with the output end of the motor in one of the embodiments,
Motor responds the first electric signal of the first detection signal output.
The sampling resistor being electrically connected with the output end of the motor is utilized to obtain the electricity in one of the embodiments,
Machine responds the first electric signal of the first detection signal output.
The exception includes motor rotation blockage in one of the embodiments,；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, according in the response detection signal
The electric signal of the motor output includes: afterwards to detect the motor with the presence or absence of abnormal step
To driving circuit input the second detection signal, and obtain the motor response the second detection signal output
The second electric signal；
Judge whether second electric signal is less than second threshold, there is no stalls if so, determining the motor, no
Then, determine that stall has occurred in the motor.
It is utilized described in the current sensor acquisition being electrically connected with the output end of the motor in one of the embodiments,
Motor responds the second electric signal of the second detection signal output.
The sampling resistor being electrically connected with the output end of the motor is utilized to obtain the electricity in one of the embodiments,
Machine responds the second electric signal of the second detection signal output.
The exception includes electric motor short circuit, motor rotation blockage in one of the embodiments,；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, according in the response detection signal
The motor is detected afterwards with the presence or absence of abnormal step includes:
First detection signal is inputted to the driving circuit, and obtains the motor and responds the first detection signal output
The first electric signal；
Judge whether first electric signal is less than first threshold, there is no short circuits if so, determining the motor；It is no
Then, determine that short circuit has occurred in the motor；
To driving circuit input the second detection signal, and obtain the motor response the second detection signal output
The second electric signal；
Judge whether second electric signal is less than second threshold, there is no stalls if so, determining the motor, no
Then, determine that stall has occurred in the motor.
A kind of electric tool starting control device, comprising:
Abnormality detection module, for after electric tool powers on, the driving circuit of motor to input detection into electric tool
Signal, to detect the motor with the presence or absence of different according to the electric signal of the motor output described after responding the detection signal
Often；
Start control module, for when judging that the motor does not occur abnormal, the input of Xiang Suoshu driving circuit to start
Signal is normally started with controlling the electric tool.
The exception includes electric motor short circuit in one of the embodiments,；The electric signal is electric current；
Also, the abnormality detection module includes:
First detection signal input unit for inputting first detection signal to the driving circuit, and obtains the electricity
Machine responds the first electric signal of the first detection signal output；
Short-circuit judging unit, for judging whether first electric signal is less than first threshold, if so, determining the electricity
There is no short circuits for machine, otherwise, it is determined that short circuit has occurred in the motor.
The exception includes motor rotation blockage in one of the embodiments,；The electric signal is electric current；
Also, the abnormality detection module includes:
Second detection signal input unit for detecting signal to driving circuit input second, and obtains the electricity
Machine responds the second electric signal of the second detection signal output；
Short-circuit judging unit, for judging whether second electric signal is less than second threshold, if so, determining the electricity
There is no stalls for machine, otherwise, it is determined that stall has occurred in the motor.
Above-mentioned electric tool starting control method and device have the beneficial effect that after electric tool powers on, to electricity
The driving circuit input detection signal of motor in power driven tools, according to the electricity of the motor output described after responding the detection signal
Signal whether there is exception to detect the motor, later when judging that the motor does not have abnormal, to the driving
Circuit inputs the enabling signal and is normally started with controlling the electric tool.Therefore, above-mentioned electric tool starts control method
And device does not use fuse additionally, but detected by way of directly passing through input detection signal and detecting corresponding electric signal
Whether motor has an exception, this detection mode after electric tool powers on every time can normal use, to overcome insurance
The defect that can not be continued to use after being powered on after electric tool after silk fusing, and also a save the sky of the occupancy in electric tool
Between, reduce cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The attached drawing of other embodiments is obtained according to these attached drawings.
Fig. 1 is the flow chart that the electric tool that an embodiment provides starts control method；
Fig. 2 is that the electric tool of embodiment illustrated in fig. 1 starts the composed structure block diagram that control method is related to；
Fig. 3 is one of specific implementation that the electric tool of embodiment illustrated in fig. 1 starts step S100 in control method
Mode flow chart；
Fig. 4 is that the electric tool of embodiment illustrated in fig. 1 starts another specific embodiment party of step S100 in control method
Formula flow chart；
Fig. 5 is the variation tendency that the electric tool of embodiment illustrated in fig. 1 starts one of detection signal of control method
Figure；
Fig. 6 is the composed structure block diagram that the electric tool that another embodiment provides starts control device；
Fig. 7 is that the electric tool of embodiment illustrated in fig. 6 starts the one of which of abnormality detection module in control device specifically
Composition block diagram；
Fig. 8 is specific group of the another kind that the electric tool of embodiment illustrated in fig. 6 starts abnormality detection module in control device
At block diagram.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
Unless otherwise defined, the skill of all technical and scientific terms used herein and the technical field for belonging to invention
The normally understood meaning of art personnel is identical.It is specific that description is intended merely in the term used in the description of invention herein
The purpose of embodiment, it is not intended that the limitation present invention.Term as used herein "and/or" includes one or more relevant institutes
Any and all combinations of list of items.
One embodiment provides a kind of electric tool starting control method, can be directly by the circuit in electric tool Lai real
It is existing, referring to FIG. 2, the circuit element that electric tool starting control method is related to includes the control unit being sequentially connected electrically
100, driving circuit 200 and motor 300, and control unit 100 is also connect with the output end of motor 300.
Wherein, control unit 100 can be capable of handling for MCU (Microcontroller Unit, micro-control unit) etc.
The chip of instruction.Driving circuit 200 is for providing driving current to motor 300 under the control of the controller 100.Driving circuit
200 can be made of metal-oxide-semiconductor, triode constant power device, such as driving circuit 200 can/half-bridge inversion circuit complete for three-phase.
Electric tool starting control method provided in an embodiment of the present invention can be executed by control unit 100, be please referred to
Fig. 1, including the following contents.
Step S100. is after electric tool powers on, the input detection letter of driving circuit 200 of motor 300 into electric tool
Number, it is abnormal whether there is according to the electrical signal detection motor 300 that motor 300 exports after responding the detection signal.Specifically
The voltage effective value on ground, the detection signal is less than the voltage effective value of enabling signal, and the enabling signal is described electronic
Input signal needed for driving circuit 200 when tool normally starts.
In the step, the input of driving circuit 200 into electric tool detects signal, such as into driving circuit 200
The grid input detection signal of metal-oxide-semiconductor.Abnormal is, for example, electric motor short circuit or motor rotation blockage etc..Detect the letter of signal and enabling signal
Number type is identical.Also, since the voltage effective value of the detection signal is less than the voltage effective value of the enabling signal,
The energy of the detection signal is less than the energy of the enabling signal.If the signal that control unit 100 exports is PWM (Pulse
Width Modulation, pulse width modulation) signal, then the duty ratio of the detection signal is then less than the enabling signal
Duty ratio.Electric signal is, for example, electric current.
In the embodiment of the present invention, when motor 300 occurs abnormal, exception then can accordingly occur in the electric signal that motor 300 exports,
Therefore motor 300 can be reflected by the detection electric signal that motor 300 exports after inputting detection signal to driving circuit 200
Whether it is abnormal.
When step S200. judges that motor 300 does not have abnormal, the enabling signal is inputted to driving circuit 200, with
The electric tool is controlled normally to start.
When step S100 is finished, and judges that motor 300 is in normal condition, then without changing circuit, and only need
Control unit 100 gradually promotes the voltage effective value (such as the duty ratio for increasing pwm signal) of output signal, and until increases to
Enabling signal, electric tool can normally start operation later.It can thus be seen that electric tool provided in an embodiment of the present invention
Start control method in control electric tool startup stage, the abnormal detection of motor 300 and normal boot process can be completed.
In addition, if after step S100 is finished, and when judging that motor 300 occurs abnormal, at this moment shut down, to solve electricity
The exception that machine 300 occurs, and until executed since step S100 again after abnormal solution.
In conclusion electric tool provided in an embodiment of the present invention starts control method, fuse is not used additionally, and
It is directly to pass through by way of input detects signal and detects corresponding electric signal to detect whether motor is abnormal, and this detection mode exists
After being powered on after electric tool every time can normal use, thus after being powered on after electric tool after overcoming blown fuse
The defect that can not be continued to use, and the occupied space in electric tool is also ad save, reduce cost.
The exception includes electric motor short circuit in one of the embodiments,.The electric signal is electric current.Electric motor short circuit can
Can reason such as: human factor, external factor (such as: it is stuck to enter dust, motor) cause main circuit current big, and are likely to
Motor itself is not abnormal.
Also, the specific embodiment of step S100 includes the content below in relation to short-circuit detecting process, please refers to Fig. 3.
Step S111. inputs first detection signal to driving circuit 200, and obtains motor 300 and respond first detection
First electric signal of signal output.Specifically, the voltage effective value of the first detection signal is less than the electricity of the enabling signal
Be pressed with valid value (such as: if the signal that control unit 100 exports is pwm signal, the duty ratio of first detection signal is less than starting
The duty ratio of signal).
In the embodiment of the present invention, first detection signal is for detecting whether motor 300 short circuit occurs.Also, the first detection
Signal should at least make between the electric current under the electric current under 300 short-circuit condition of motor and the non-shorting state of motor 300 exist can
The difference that controlled unit 100 recognizes.
Specifically, motor 300 is obtained according to described the using the current sensor with the electric connection of the output end of motor 300
First electric signal of one detection signal output；Alternatively, obtaining electricity using the sampling resistor with the electric connection of the output end of motor 300
The first electric signal that machine 300 is exported according to the first detection signal.
It wherein, can be using the value of current sensor measurement as the first electric signal if using the first above-mentioned situation；
If the first telecommunications can be obtained divided by the resistance of sampling resistor in the voltage of sampling resistor using above-mentioned second situation
Number.
Further, the first electric signal (can be adopted to driving circuit 200 at one repeatedly to measure obtained average value
First detection signal is repeatedly inputted in the sample period, and detects corresponding first electric signal of each first detection signal, finally seeks institute
Have the average value of the first electric signal), so as to improve the precision of detection.Alternatively, the first electric signal may be one-shot measurement
Obtained value, i.e. instantaneous value.
Step S112. judges whether first electric signal is less than first threshold, if so, thening follow the steps S114；Otherwise,
Then follow the steps S113.
Wherein, it when the first electric signal reaches first threshold, represents motor 300 and has begun short circuit has occurred.Due to electricity
Electric current under 300 short-circuit condition of machine can be greater than electric current when non-shorting state, therefore can pass through the first electric signal and the first threshold
Comparison result between value, to judge whether motor 300 occurs short circuit.
Step S113. determines that short circuit has occurred in motor 300.
Further, after determining that short circuit has occurred in motor 300, control electric tool is shut down, with unshorting failure.
Step S114. determines that short circuit does not occur for motor 300.
The exception includes motor rotation blockage in one of the embodiments,.The electric signal is electric current.Wherein, motor is stifled
Turn possible reason be, for example: rotor with stator contact is stuck, driven equipment is stuck or machine utilization causes greatly very much motor
Can not drive etc..Stator winding will flow through the electric current for being several times as much as rated current after motor rotation blockage, so that motor fast heating, very
To burning winding.
Also, the specific embodiment of step S100 includes the content below in relation to stall detection process, please refers to Fig. 4.
Step S121. obtains motor 300 and responds second inspection to the input of driving circuit 200 second detection signal
Survey the second electric signal of signal output.Specifically, the voltage effective value of the second detection signal is less than the enabling signal
Voltage effective value (such as: if the signal that control unit 100 exports is pwm signal, the duty ratio of the second detection signal, which is less than, to be opened
The duty ratio of dynamic signal).
In the embodiment of the present invention, the second detection signal is for detecting whether motor 300 blocking phenomenon occurs.Also, second
Detection signal should at least make to exist between the electric current under the electric current under 300 locked rotor condition of motor and the non-locked rotor condition of motor 300
It being capable of the difference that recognizes of controlled unit 100.
Specifically, it is described second detection signal voltage effective value be also greater than the first detection signal voltage it is effective
Value.If the signal type that control unit 100 exports is pwm signal, then the duty ratio of the first detection signal is less than described
The duty ratio of second detection signal, and the duty ratio of the second detection signal is less than the duty ratio of the enabling signal.
Specifically, motor 300 is obtained according to described the using the current sensor with the electric connection of the output end of motor 300
Second electric signal of two detection signal outputs；Alternatively, obtaining electricity using the sampling resistor with the electric connection of the output end of motor 300
The second electric signal that machine 300 is exported according to the second detection signal.
Wherein, if using the first above-mentioned situation, the value of current sensor measurement directly can be used as the second telecommunications
Number；If the second electricity can be obtained divided by the resistance of sampling resistor in the voltage of sampling resistor using above-mentioned second situation
Signal.
Further, the second electric signal (can be adopted to driving circuit 200 at one repeatedly to measure obtained average value
The second detection signal is repeatedly inputted in the sample period, and detects corresponding second electric signal of each second detection signal, finally seeks institute
Have the average value of the second electric signal), so as to improve the precision of detection.Alternatively, the second electric signal may be one-shot measurement
Obtained value, i.e. instantaneous value.
Step S122. judges whether second electric signal is less than second threshold, if so, thening follow the steps S124；Otherwise,
Then follow the steps S123.
Wherein, it when the second electric signal reaches second threshold, represents motor 300 and has begun blocking phenomenon has occurred.By
Electric current under 300 locked rotor condition of motor can be greater than the electric current under non-locked rotor condition, therefore can pass through the second electric signal and the
Comparison result between two threshold values, to judge whether motor 300 occurs stall.
Step S123. determines that stall has occurred in motor 300.
Further, after determining that stall has occurred in motor 300, it can control electric tool shutdown, to exclude stall
Failure.
Step S124. determines motor 300, and there is no stalls.
It should be noted that in other examples, the electric tool starting control method can also include simultaneously
The short-circuit detecting process and stall detection process that above-mentioned two embodiment provides, specifically: after electric tool powers on, control is single
Member 100 inputs first detection signal to driving circuit 200 first, (successively executes shown in Fig. 3 each to carry out short-circuit detecting
Step), if it is judged that be motor 300 there is no short circuit, the voltage of the then rising output signal of control unit 100 is effective
Value, and stall detection is carried out according to each step shown in Fig. 4 up to reaching the second detection signal, then successively, if judging result is
There is no stalls for motor 300, then control unit 100 continues the voltage effective value of rising output signal, and until reaches starting
Signal, to normally start electric tool.In addition, in the detection process, as long as discovery motor 300 short circuit occurs or stall is existing
As stoppage protection then being carried out immediately, so that the phenomenon that avoiding generating device, motor etc. from being burned out, enhances the use of electric tool
Reliability.
Next, Fig. 5, which shows PWM in the above process, to be believed so that the signal that control unit 100 exports is pwm signal as an example
Number change procedure: from t0At the moment, control unit 100 exports PWM1 signal, and PWM1 signal belongs to above-mentioned first detection
At this moment signal can start to carry out short-circuit detecting.After short-circuit detecting, if motor 300 there is no short circuit phenomenon,
From t1At the moment, 100 output duty cycle of control unit is greater than the PWM2 signal of PWM1 signal, and PWM2 signal belongs to above-mentioned the
Two detection signals, at this moment can then start to carry out stall detection.Stall detection finishes and judges motor 300 there is no stalls
When, from t2At the moment, control unit 100 continues to increase the duty ratio of output signal, and until reaches duty ratio greater than PWM2
The PWM3 signal of signal, PWM3 signal then belong to the enabling signal, and electric tool can normally start later.
When short circuit occurs due to motor, combined floodgate immediate current is very big, and switching moments tripping or thermal element fuse etc. are immediately
Movement, therefore short circuit current majority will cause destruction；And when motor generation stall, being often as mechanical hard defects causes motor by card
Firmly, the time has grown motor and can slowly generate heat, and is likely to result in switch trip, thermal element or fuse movement etc., but motor will not
Damage.Therefore, for Short-circuit Working Condition compared with stall operating condition, the extent of injury of Short-circuit Working Condition is bigger, then above-mentioned Fig. 5 is corresponding specific
Embodiment carries out short-circuit detecting first, then carries out stall detection again, can exclude the biggish short circuit event of destructive power first
Barrier, to further improve the reliability of electric tool.
It is understood that the specific implementation of step S100 is not limited to above situation, such as according to certain mode
When can guarantee that short circuit will not occur for motor 300, step S100 then can be only with stall detection process shown in Fig. 4；Alternatively,
When can guarantee that stall will not occur for motor 300 according to certain mode, step S100 then can be only with short circuit shown in Fig. 3
Detection process.
It should be noted that Fig. 1, Fig. 3 and Fig. 4 are the flow diagram of the method for the embodiment of the present invention.It should be understood that
It is, although each step in the flow chart of Fig. 1, Fig. 3 and Fig. 4 successively shows that these steps are simultaneously according to the instruction of arrow
It is not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, the execution of these steps is not
There is stringent sequence limitation, can execute in the other order.Moreover, at least part step in Fig. 1, Fig. 3 and Fig. 4 can
To include that perhaps these sub-steps of multiple stages or stage are not necessarily to execute completion in synchronization to multiple sub-steps,
But can execute at different times, execution sequence is also not necessarily and successively carries out, but can with other steps or
The sub-step or at least part in stage of other steps execute in turn or alternately.
Another embodiment provides a kind of electric tools to start control device, referring to FIG. 6, including in following
Hold.
Abnormality detection module 400, for after electric tool powers on, the driving circuit of motor to input inspection into electric tool
Signal is surveyed, to detect the motor with the presence or absence of different according to the electric signal of the motor output described after responding the detection signal
Often.
Start control module 500, for when judging that the motor does not occur abnormal, Xiang Suoshu driving circuit to input institute
Enabling signal is stated, is normally started with controlling the electric tool.
The exception includes electric motor short circuit in one of the embodiments,.The electric signal is electric current.Abnormality detection module
400 include the following contents, please refers to Fig. 7.
First detection signal input unit 410, for inputting first detection signal to the driving circuit, and for obtaining
The motor responds the first electric signal of the first detection signal output.
Short-circuit judging unit 420, for judging whether first electric signal is less than first threshold, if so, determining institute
Stating motor, there is no short circuits, otherwise, it is determined that short circuit has occurred in the motor.
The exception includes motor rotation blockage in one of the embodiments,.The electric signal is electric current.Abnormality detection module
400 include the following contents, please refers to Fig. 8.
Second detection signal input unit 430, for detecting signal to driving circuit input second, and for obtaining
The motor responds the second electric signal of the second detection signal output.
Stall judging unit 440, for judging whether second electric signal is less than second threshold, if so, determining institute
Stating motor, there is no stalls, otherwise, it is determined that stall has occurred in the motor.
It should be noted that electric tool starting control device provided in an embodiment of the present invention and a upper embodiment provided
Electric tool starts control method and corresponds to, and just repeats no more here.
It should be noted that electric tool provided in an embodiment of the present invention can be hair dryer, jetting machine, grass trimmer etc.
Deng.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of electric tool starts control method, comprising:
After electric tool powers on, the driving circuit input detection signal of motor into electric tool, according in response
The electric signal of the motor output whether there is exception to detect the motor after detection signal；
When judging that the motor does not occur abnormal, Xiang Suoshu driving circuit inputs enabling signal, to control the electric tool
Normal starting.
2. electric tool according to claim 1 starts control method, which is characterized in that the exception includes that motor is short
Road；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, according to the institute after responding the detection signal
The electric signal of motor output, which is stated, to detect the motor with the presence or absence of abnormal step includes:
First detection signal is inputted to the driving circuit, and obtains the motor responds first detection signal output the
One electric signal；
Judge whether first electric signal is less than first threshold, if so, determining the motor, there is no short circuits, otherwise,
Determine that short circuit has occurred in the motor.
3. electric tool according to claim 2 starts control method, which is characterized in that utilize the output with the motor
The current sensor that end is electrically connected obtains the first electric signal that the motor responds the first detection signal output.
4. electric tool according to claim 2 starts control method, which is characterized in that utilize the output with the motor
The sampling resistor that end is electrically connected obtains the first electric signal that the motor responds the first detection signal output.
5. electric tool according to claim 1 starts control method, which is characterized in that the exception is stifled including motor
Turn；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, according to the institute after responding the detection signal
The electric signal of motor output, which is stated, to detect the motor with the presence or absence of abnormal step includes:
To driving circuit input the second detection signal, and obtain the motor responds the second detection signal output the
Two electric signals；
Judge whether second electric signal is less than second threshold, if so, determining the motor, there is no stalls, otherwise,
Determine that stall has occurred in the motor.
6. electric tool according to claim 5 starts control method, which is characterized in that utilize the output with the motor
The current sensor that end is electrically connected obtains the second electric signal that the motor responds the second detection signal output.
7. electric tool according to claim 5 starts control method, which is characterized in that utilize the output with the motor
The sampling resistor that end is electrically connected obtains the second electric signal that the motor responds the second detection signal output.
8. electric tool according to claim 1 starts control method, which is characterized in that the exception includes that motor is short
Road, motor rotation blockage；The electric signal is electric current；
Also, the driving circuit input detection signal of motor into electric tool, to be examined according to after responding the detection signal
The motor, which is surveyed, with the presence or absence of abnormal step includes:
First detection signal is inputted to the driving circuit, and obtains the motor responds first detection signal output the
One electric signal；
Judge whether first electric signal is less than first threshold, there is no short circuits if so, determining the motor；Otherwise,
Determine that short circuit has occurred in the motor；
To driving circuit input the second detection signal, and obtain the motor responds the second detection signal output the
Two electric signals；
Judge whether second electric signal is less than second threshold, if so, determining the motor, there is no stalls, otherwise,
Determine that stall has occurred in the motor.
9. a kind of electric tool starts control device characterized by comprising
Abnormality detection module, for after electric tool powers on, the driving circuit input detection signal of motor into electric tool,
To detect the motor with the presence or absence of abnormal according to the electric signal of the motor output described after responding the detection signal；
Start control module, for when judge that the motor does not occur abnormal, Xiang Suoshu driving circuit input enabling signal,
Normally started with controlling the electric tool.
10. electric tool according to claim 9 starts control device, which is characterized in that the exception includes that motor is short
Road；The electric signal is electric current；
Also, the abnormality detection module includes:
First detection signal input unit for inputting first detection signal to the driving circuit, and obtains the motor and rings
Answer the first electric signal of the first detection signal output；
Short-circuit judging unit, for judging whether first electric signal is less than first threshold, if so, determining that the motor does not have
There is generation short circuit, otherwise, it is determined that short circuit has occurred in the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947237.4A CN109656156A (en) | 2017-10-12 | 2017-10-12 | Electric tool starts control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947237.4A CN109656156A (en) | 2017-10-12 | 2017-10-12 | Electric tool starts control method and device |
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Cited By (1)
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| WO2022094851A1 (en) * | 2020-11-05 | 2022-05-12 | Techtronic Cordless Gp | Power tool control system |
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