CN102681451A - Electric tool with memorizing function and method for realizing motor shaft lock protection - Google Patents
Electric tool with memorizing function and method for realizing motor shaft lock protection Download PDFInfo
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- CN102681451A CN102681451A CN2012101421615A CN201210142161A CN102681451A CN 102681451 A CN102681451 A CN 102681451A CN 2012101421615 A CN2012101421615 A CN 2012101421615A CN 201210142161 A CN201210142161 A CN 201210142161A CN 102681451 A CN102681451 A CN 102681451A
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Abstract
The invention discloses an electric tool with a memorizing function and a method for realizing motor shaft lock protection. The electric tool comprises a motor for driving, and is characterized by further comprising a memorizer for memorizing the running direction of the motor before shutdown, and a controller for controlling the motor to rotate reversely according to the rotating direction information of the memorizer when the motor is started up. The electric tool has the beneficial effects that the electric tool has a memorizing function, the running direction of the motor is memorized reliably through the memorizer, and the memorizing function of the electric tool is realized on the basis of not increasing hardware circuit cost, so that the problem of motor shaft lock which possibly occurs in the use process of the electric tool is effectively and reliably prevented and solved in combination with a method for realizing motor shaft lock protection through the function and the controller.
Description
Technical field
The present invention relates to a kind of electric tool and guard method thereof, be specifically related to a kind of method that has the electric tool of memory function and realize rotation-clogging protection.
Background technology
Electric tool such as pruner cause motor rotation blockage through regular meeting greatly because of load; Make the execution unit of electric tool be stuck and can't run well; For addressing this problem; The big electric current that utilizes at present stall moment mostly makes the motor counter-rotating at once, thereby avoids execution unit to be stuck as signal when stall takes place.But, in actual mechanical process, usually false judgment can appear, as: stall does not take place in motor, and execution unit but is stuck because of load is excessive, and this type of phenomenon causes this anti-blocking shifting method unreliable.Also do not have a kind of electric tool at present, can effectively address the above problem.
Summary of the invention
For solving the deficiency of prior art; The object of the present invention is to provide a kind of electric tool with memory function; And utilize this memory function can realize rotation-clogging protection; Not only can effectively solve the problem that the electric tool execution unit is stuck, and on the basis that does not increase the hardware circuit cost, guarantee the reliability of solution.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
Electric tool with memory function; Comprise: the motor that is used to drive; It is characterized in that, comprising: be used to put down in writing the rotation direction of above-mentioned motor before self shutdown storer, be used for when motor self is started shooting direction information and control the controller that motor turns round in the opposite direction according to above-mentioned storer.
Aforesaid electric tool with memory function is characterized in that, also comprises: CS, energy supply control module, switch signal acquisition module, current detection module, motor drive module, power module, motor output module; Above-mentioned controller is connected with above-mentioned motor drive module, switch signal acquisition module, current detection module, energy supply control module and power module; Above-mentioned power module is connected with above-mentioned energy supply control module, motor drive module, and above-mentioned motor drive module is connected with the motor output module; Above-mentioned motor drive module and energy supply control module all receive the control of above-mentioned controller; Above-mentioned switch signal acquisition module, current detection module are all to above-mentioned controller feedback signal; Above-mentioned power module receives the control of above-mentioned energy supply control module and to above-mentioned controller and motor drive module electric power is provided, and above-mentioned motor output module receives the control of motor drive module; Above-mentioned controller is electrically connected with above-mentioned storer.
Aforesaid electric tool with memory function is characterized in that above-mentioned controller comprises the MCU chip.
Aforesaid electric tool with memory function is characterized in that, above-mentioned storer is the FLASH storer.
Aforesaid electric tool with memory function is characterized in that, above-mentioned energy supply control module comprises: can make power module guarantee the power supply self-hold circuit of certain state.
Aforesaid electric tool with memory function is realized the method for rotation-clogging protection; It is characterized in that; Above-mentioned storer stores the information about motor steering when above-mentioned motor self shuts down; Above-mentioned controller when motor self is started shooting once more, read in the storer about last motor steering information and control motor to rotate with the put down in writing reverse direction that turns to.
The method of aforesaid rotation-clogging protection; It is characterized in that above-mentioned electric tool with memory function also comprises: CS, energy supply control module, switch signal acquisition module, current detection module, motor drive module, power module, motor output module; Above-mentioned controller is connected with above-mentioned motor drive module, switch signal acquisition module, current detection module, energy supply control module and power module; Above-mentioned power module is connected with above-mentioned energy supply control module, motor drive module, and above-mentioned motor drive module is connected with the motor output module; Above-mentioned motor drive module and energy supply control module all receive the control of above-mentioned controller; Above-mentioned switch signal acquisition module, current detection module are all to above-mentioned controller feedback signal; Above-mentioned power module receives the control of above-mentioned energy supply control module and to above-mentioned controller and motor drive module electric power is provided, and above-mentioned motor output module receives the control of motor drive module; Above-mentioned controller is electrically connected with above-mentioned storer; Above-mentioned controller comprises the MCU chip, and above-mentioned storer is the FLASH storer; Above-mentioned rotation-clogging protection method specifically comprises the steps:
A, system initialization: get into readiness for operation, carry out step B;
B, read the data that turn in the FLASH storer that writes down in the MCU chip, carry out step C then;
Whether C, MCU chip judge and turn to data effective in the FLASH storer that reads, if effectively then carry out step D, the invalid step K of then carrying out;
D, the running state data of gathering motor are carried out step e;
E, above-mentioned MCU chip carry out stall to be judged, if judged result does not meet the stall condition, then carries out step F, carries out step K if judged result meets the stall condition;
F, above-mentioned MCU chip judge whether CS is in the state that unclamps, if CS is in the state that unclamps, then carry out step K, if CS is not to be in the state that unclamps, then carry out step G;
G, detect the motor state of last time: the MCU chip is judged the motor state of last time through the data that turn in the FLASH storer of record, carries out step H according to judged result;
The conversion that H, control motor turn to;
Whether the running status that I, MCU chip are judged this motor record, if record then returns step D, if unwritten words are then carried out step J;
J, write down the running status of this motor, and deposit the Flash storer in;
K, the above-mentioned motor drive module of above-mentioned MCU chip controls stop drive motor, are back to step D after being finished.
The method of aforesaid rotation-clogging protection is characterized in that, above-mentioned steps H comprises substep H1 and the H2 that two selectivity are carried out:
H1: when step G judged result when just changeing, carry out step H1, drive hardware module, make motor counter-rotating operation;
H2: when step G judged result is counter-rotating, carry out step H2, drive hardware module, make motor just transport row.
Usefulness of the present invention is: electric tool of the present invention has memory function; Rotation direction through storer reliable recording motor; On the basis that does not increase the hardware circuit cost, make electric tool realize memory function; And, prevent and solve the stall problem that possibly occur in the electric tool use effectively, reliably in conjunction with the method for this function and controller realization rotation-clogging protection.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of the hardware circuit of the electric tool with memory function of the present invention;
Fig. 2 is the schematic flow sheet of a preferred embodiment of the method for rotation-clogging protection of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done concrete introduction.
With reference to shown in Figure 1; Electric tool with memory function of the present invention comprises: the motor that is used to drive the electric tool running; In order to realize memory function, electric tool also comprises: be used to put down in writing the rotation direction of motor before self shutdown storer, be used for when motor self is started shooting direction information and control the controller that motor turns round in the opposite direction according to storer.
As a kind of preferred version; Storer is the FLASH storer; Have memory function, can realize remembering the electric tool state, further; The FLASH storer preferably adopts and can keep the storage medium of electric tool state to process for a long time, as: ferroelectric Flash, ROM Flash, E2ROM Flash etc.
In order to make the memory function of electric tool realize better; With reference to Fig. 1, electric tool of the present invention also comprises: CS, energy supply control module, switch signal acquisition module, current detection module, motor drive module, power module, motor output module.
Wherein, CS is the parts that the operator is used to control electric tool, have pressing and unclamp two states, and starter motor when CS is in the state of pressing, the concrete control of unclamping rear motor is promptly realized by software.
Controller comprises: be used to control MCU chip and peripheral circuit with logic determines.In order further to realize long-time memory, can also pass through MCU chip controls delay cut-off, also can the state in the certain hour of instrument be stored in the FLASH storer even the electricity went off.
Switch signal acquisition module is used to detect the state of CS, and gives the MCU chip with detected feedback of status.
Current detection module mainly acts on the current value that is to detect motor, and the situation of current value is informed the MCU chip, judges so that carry out stall.Generally speaking, when being plugged by motor-driven execution unit, the current value of motor can moment increases, in view of the above as the basis for estimation of stall.
Energy supply control module mainly is according to the order of MCU chip and then control power module; As a kind of preferred version; Also be provided with the power supply self-hold circuit in the energy supply control module, the effect of power supply self-hold circuit is to make power module to guarantee certain power supply state, and no matter whether machine operation; Can both be at any time for motor provide adaptive electric power, make the motor can instant recovery work.
The effect of power module is that external power supply is converted into adaptive power supply supplies with corresponding module, and the motor drive module effect then is the ruuning situation according to the order control motor of MCU chip.
The main effect of motor output module is to connect motor, thus drive motor work.
The effect and the working method of each module of electric tool have more than been introduced; With regard to their inner connecting way; Referring to Fig. 1; Controller is connected with motor drive module, switch signal acquisition module, current detection module, energy supply control module and power module, and power module is connected with energy supply control module, motor drive module, and motor drive module is connected with the motor output module; Motor drive module and energy supply control module all are controlled the control of device; Switch signal acquisition module, current detection module are all to the controller feedback signal; Power module receives the control of energy supply control module and to controller and motor drive module electric power is provided, and the motor output module receives the control of motor drive module; Controller is electrically connected and incites somebody to action wherein, and data recorded feeds back to controller with storer.
With reference to Fig. 2, the method for rotation-clogging protection of the present invention is described in detail, what at first will explain a bit is, and CS is a point driving switch, and promptly the operator promptly starts according to the CS motor, unclamps control CS rear motor and does not just turn round.
The method of rotation-clogging protection specifically comprises following step:
A. system initialization: get into readiness for operation.That is: for each module charging of the present invention can be worked them, but not drive motor work, system initialization can promptly begin initialization after inserting power supply, also can be with special button as the initialized triggering that inserts behind the power supply.
B. in the FLASH storer that writes down in the MCU chip of Read Controller about the data of motor steering state last time.
The MCU chip of C controller judges whether the FLASH data that read are effective, if effectively then carry out step D, the invalid step K of then carrying out;
The effect of step B and step C be use first or the FLASH storer in data when invalid, proceed to step D through different steps, so that effective current data is gathered in the normal work of beginning.
D. gather the running state data of motor, specifically be meant current data, and the current data that collects is fed back to the MCU chip, carry out step e.
E. step e is a state determining step, utilizes the MCU chip of controller to carry out the stall judgement, if judged result does not meet the stall condition, then carries out step F, carries out step K if judged result meets the stall condition;
Particularly; In step e; The MCU chip is judged according to the current data value that current detection module detects, if motor current value meets the situation of rotation-clogging protection decision condition defined, when reaching a certain current value such as electric current; Promptly carry out step K, if motor current value does not meet the situation of rotation-clogging protection decision condition defined then carries out step F.We can know with reference to summary of the invention, and step K provides one to stop the drive motor step, play the effect of protection motor when stall takes place.
F. the MCU chip of controller judges whether CS is in the state that unclamps, if CS is in the state that unclamps, then carries out step K, if CS is not to be in the state that unclamps, then carries out step G; The purpose of this step F is, the state of CS is judged.We see earlier and when CS does not unclamp, carry out step G, step H, step I, step J successively.
G: detect the motor state of last time: controller is judged the motor steering state of last time through the Flash data that are recorded in the FLASH storer, carries out step H according to judged result.
H: the conversion that this step control motor turns to is used to prevent and solve stall.
Need to prove that step H comprises substep H1 and the H2 that two selectivity are carried out.H1: when step G judges that motor is last when just changeing, carry out step H1, that is: drive hardware module, the motor counter-rotating is moved; H2: when step G judges that the motor last time is for counter-rotating, carry out step H2, that is: drive hardware module, make motor just transport row.That is to say that anyway, this rotation direction of motor is opposite with the rotation direction of last time all, thereby controller sends and the opposite instruction of rotation direction last time, can effectively prevent and solve the jammed problem of execution unit.
I: controller judges whether the record of this motor operating state has been recorded in the FLASH storer, if (promptly writing down) then is back to step D, if not proceeding step J.The effect in this step is to guarantee that this running status of motor can be by effective record.
J: write down the running status of this motor, and be stored in the FLASH reservoir, be back to step D then.
, need to prove that step D is a step of carrying out repeatedly here, behind system initialization,, all turn back to step D at last, so back and forth although possibly carry out the workflow formed by different steps according to actual conditions.This is because in the method; The protection of stall is to draw through the current value data of gathering motor; So after motor can run well, should get back to step D, it is unusual that continuous detection possibly occur, and after appearance is unusual; Continue to get into the course of work thereby should get back to step D after getting rid of unusually, so this is a step of carrying out repeatedly.
Below do following introduction to meeting the step K of carrying out under the situation that stall conditioned disjunction CS unclamps.
The above-mentioned motor drive module of K:MCU chip controls stops drive motor.This step is actually one and stops step, when stall takes place, can protect the serviceable life of motor effectively; When the user unclamps CS, then, stop the work of electric tool according to user's wish disable motor.
As a kind of preferred version, step K comprises the substep that two orders are accomplished: K1: motor drive module is disable motor under the MCU chip controls; K2: energy supply control module is the powered-down self-hold circuit under the MCU chip controls.
Can find out that under this workflow, record, collection and judgement through to the current data of motor can prevent the generation of stall,, also can immediately solve, thereby realize rotation-clogging protection even stall takes place.
Be noted that software has preestablished the steering state (forward or backwards) of motor when using electric tool of the present invention for the first time, motor operation back controller gets off this motor steering state recording, deposits the motor steering state that has just write down in.
The foregoing description does not limit the present invention in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in protection scope of the present invention.
Claims (8)
1. the electric tool that has memory function; Comprise: the motor that is used to drive; It is characterized in that, comprising: be used to put down in writing the rotation direction of above-mentioned motor before self shutdown storer, be used for when motor self is started shooting direction information and control the controller that motor turns round in the opposite direction according to above-mentioned storer.
2. the electric tool with memory function according to claim 1 is characterized in that, also comprises: CS, energy supply control module, switch signal acquisition module, current detection module, motor drive module, power module, motor output module; Above-mentioned controller is connected with above-mentioned motor drive module, switch signal acquisition module, current detection module, energy supply control module and power module; Above-mentioned power module is connected with above-mentioned energy supply control module, motor drive module, and above-mentioned motor drive module is connected with the motor output module; Above-mentioned motor drive module and energy supply control module all receive the control of above-mentioned controller; Above-mentioned switch signal acquisition module, current detection module are all to above-mentioned controller feedback signal; Above-mentioned power module receives the control of above-mentioned energy supply control module and to above-mentioned controller and motor drive module electric power is provided, and above-mentioned motor output module receives the control of motor drive module; Above-mentioned controller is electrically connected with above-mentioned storer.
3. the electric tool with memory function according to claim 2 is characterized in that above-mentioned controller comprises the MCU chip.
4. the electric tool with memory function according to claim 2 is characterized in that, above-mentioned storer is the FLASH storer.
5. according to any described electric tool of claim 1 to 4, it is characterized in that above-mentioned energy supply control module comprises: can make power module guarantee the power supply self-hold circuit of certain state with memory function.
6. realize the method for rotation-clogging protection like any described electric tool of claim 1 to 5 with memory function; It is characterized in that; Above-mentioned storer stores the information about motor steering when above-mentioned motor self shuts down; Above-mentioned controller when motor self is started shooting once more, read in the storer about last motor steering information and control motor to rotate with the put down in writing reverse direction that turns to.
7. the method for rotation-clogging protection according to claim 6; It is characterized in that above-mentioned electric tool with memory function also comprises: CS, energy supply control module, switch signal acquisition module, current detection module, motor drive module, power module, motor output module; Above-mentioned controller is connected with above-mentioned motor drive module, switch signal acquisition module, current detection module, energy supply control module and power module; Above-mentioned power module is connected with above-mentioned energy supply control module, motor drive module, and above-mentioned motor drive module is connected with the motor output module; Above-mentioned motor drive module and energy supply control module all receive the control of above-mentioned controller; Above-mentioned switch signal acquisition module, current detection module are all to above-mentioned controller feedback signal; Above-mentioned power module receives the control of above-mentioned energy supply control module and to above-mentioned controller and motor drive module electric power is provided, and above-mentioned motor output module receives the control of motor drive module; Above-mentioned controller is electrically connected with above-mentioned storer; Above-mentioned controller comprises the MCU chip, and above-mentioned storer is the FLASH storer; Above-mentioned rotation-clogging protection method specifically comprises the steps:
A, system initialization: get into readiness for operation, carry out step B;
B, read the data that turn in the FLASH storer that writes down in the MCU chip, carry out step C then;
Whether C, MCU chip judge and turn to data effective in the FLASH storer that reads, if effectively then carry out step D, the invalid step K of then carrying out;
D, the running state data of gathering motor are carried out step e;
E, above-mentioned MCU chip carry out stall to be judged, if judged result does not meet the stall condition, then carries out step F, carries out step K if judged result meets the stall condition;
F, above-mentioned MCU chip judge whether CS is in the state that unclamps, if CS is in the state that unclamps, then carry out step K, if CS is not to be in the state that unclamps, then carry out step G;
G, detect the motor state of last time: the MCU chip is judged the motor state of last time through the data that turn in the FLASH storer of record, carries out step H according to judged result;
The conversion that H, control motor turn to;
Whether the running status that I, MCU chip are judged this motor record, if record then returns step D, if unwritten words are then carried out step J;
J, write down the running status of this motor, and deposit the Flash storer in;
K, the above-mentioned motor drive module of above-mentioned MCU chip controls stop drive motor, are back to step D after being finished.
8. the method for rotation-clogging protection according to claim 7 is characterized in that, above-mentioned steps H comprises substep H1 and the H2 that two selectivity are carried out:
H1: when step G judged result when just changeing, carry out step H1, drive hardware module, make motor counter-rotating operation;
H2: when step G judged result is counter-rotating, carry out step H2, drive hardware module, make motor just transport row.
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| CN2012101421615A CN102681451A (en) | 2012-05-10 | 2012-05-10 | Electric tool with memorizing function and method for realizing motor shaft lock protection |
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| CN2012101421615A CN102681451A (en) | 2012-05-10 | 2012-05-10 | Electric tool with memorizing function and method for realizing motor shaft lock protection |
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| CN106193883A (en) * | 2016-07-18 | 2016-12-07 | 希美克(广州)实业有限公司 | A kind of intelligent switch door container and cabinet door open-close method |
| CN107482584A (en) * | 2017-08-18 | 2017-12-15 | 宁波汉浦工具有限公司 | A kind of over-current protection method of electric tool |
| CN110877324A (en) * | 2018-09-06 | 2020-03-13 | 苏州宝时得电动工具有限公司 | Hand-held power tool and control method and operation method thereof |
| CN112865665A (en) * | 2021-01-26 | 2021-05-28 | 大陆汽车电子(长春)有限公司 | Electronic control unit and computer program product for driving an electric machine in a sensorless manner |
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Application publication date: 20120919 |