CN105356443A - Electric tool and power-off protection system thereof - Google Patents
Electric tool and power-off protection system thereof Download PDFInfo
- Publication number
- CN105356443A CN105356443A CN201510874868.9A CN201510874868A CN105356443A CN 105356443 A CN105356443 A CN 105356443A CN 201510874868 A CN201510874868 A CN 201510874868A CN 105356443 A CN105356443 A CN 105356443A
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- Prior art keywords
- controller
- filter capacitor
- drive unit
- protective system
- power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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- Emergency Protection Circuit Devices (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses an electric tool and a power-off protection system thereof. The power-off protection system includes a driving device, a driving device power source component which provides power for the driving device, a controller for controlling the operation of the driving device, a controller power source component which provides power for the controller, a first rectifying and filtering circuit which is connected with a power source output end and provides power for the controller power source component and a second rectifying and filtering circuit which is connected with the power source output end and provides power for the driving device power source component; the first rectifying and filtering circuit includes a first rectifying component and a first filtering capacitor, wherein the filtering first capacitor is connected with the controller power source component; the second rectifying and filtering circuit includes a second rectifying component and a second filtering capacitor, wherein the second filtering capacitor is connected with the driving device power source component; and the capacitance of the first filtering capacitor is lower than the capacitance of the second filtering capacitor. With the power-off protection system provided by the invention adopted, power-off operation can be avoided, and security hidden risks can be eliminated.
Description
Technical field
The present invention relates to power-off protection technical field, particularly a kind of electric tool and circuit breaking protective system thereof.
Background technology
In current electric tool, mostly convert extraneous alternating current to direct current by current rectifying and wave filtering circuit and input again in the drive unit of electric tool.
To have the electric tool of motor, electric tool comprises motor and controls the controller of motor operation, is realized start and stop and the speed of service of motor by controller.Wherein, motor has the motor power parts to its power supply, and controller has the controller power source parts to its power supply equally.Controller power source and motor power parts all receive the electric current of same group of current rectifying and wave filtering circuit conveying.
But because needs drive motors rotates, feeding electric motors amount is more, and this just makes the capacitance of filter capacitor in current rectifying and wave filtering circuit larger.After electric tool power-off, in filter capacitor, still store more electricity.After the switch of error shock power driven tools, electric tool still can start, and there is potential safety hazard, very easily causes the person or property safety loss.
Therefore, how avoiding power-off to run, eliminate safe hidden trouble, is the art personnel problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of circuit breaking protective system, avoid power-off to run, eliminate safe hidden trouble.The invention also discloses a kind of electric tool with above-mentioned circuit breaking protective system.
For achieving the above object, the invention provides following technical scheme:
A kind of circuit breaking protective system, comprise: drive unit, to the drive unit power supply unit that described drive unit is powered, control the controller that described drive unit runs, to the controller power source parts that described controller is powered, for being connected with power output end and first current rectifying and wave filtering circuit of powering to described controller power source parts and for being connected with power output end and the second current rectifying and wave filtering circuit drive unit power supply unit of powering to described drive unit power supply unit;
The first filter capacitor that described first current rectifying and wave filtering circuit comprises the first rectification part and is connected with described controller power source parts; The second filter capacitor that described second current rectifying and wave filtering circuit comprises the second rectification part and is connected with described motor driving power power supply;
The capacitance of described first filter capacitor is less than the capacitance of described second filter capacitor.
Preferably, in above-mentioned circuit breaking protective system, the capacitance span of described second filter capacitor is 1000-3000 μ F, and the capacitance span of described first filter capacitor is 1-100 μ F.
Preferably, in above-mentioned circuit breaking protective system, described drive unit power supply unit and described controller communicate to connect.
Preferably, in above-mentioned circuit breaking protective system, described first rectification part is the first bridge rectifier diode parts.
Preferably, in above-mentioned circuit breaking protective system, described first rectification part is full-wave rectification diode part.
Preferably, in above-mentioned circuit breaking protective system, described second rectification part is the second bridge rectifier diode parts.
Preferably, in above-mentioned circuit breaking protective system, described drive unit is DC brushless motor.
The embodiment of the present invention additionally provides a kind of electric tool, comprises the circuit breaking protective system as described in above-mentioned any one.
As can be seen from above-mentioned technical scheme; circuit breaking protective system provided by the invention; because the capacity of the first filter capacitor only runs for driving governor; its capacitance stores electrical demand is less; and the capacitance stores electricity of the second filter capacitor needs enough to run for drive unit, its capacitance stores electrical demand is more, therefore; in the present embodiment, the capacitance of the first filter capacitor is less than the capacitance of the second filter capacitor.Meanwhile, the velocity of discharge of the first filter capacitor is higher than the velocity of discharge of the second filter capacitor, and make under powering-off state, the electricity of its inside can discharge within a short period of time by the first filter capacitor, cannot power to controller.In the case, even if the second filter capacitor still stores by electricity, under not sending at controller the state running control signal, drive unit also cannot be made to start.Circuit breaking protective system provided by the invention, the device avoiding this circuit breaking protective system of application runs under powering-off state, eliminates potential safety hazard.
Present invention also offers a kind of electric tool, comprise as any one circuit breaking protective system above-mentioned.Because above-mentioned circuit breaking protective system has above-mentioned technique effect, the electric tool with above-mentioned circuit breaking protective system also should have same technique effect, introduces no longer in detail at this.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the first circuit breaking protective system that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the second circuit breaking protective system that Fig. 2 provides for the embodiment of the present invention.
Embodiment
The invention discloses a kind of circuit breaking protective system, avoid power-off to run, eliminate safe hidden trouble.The invention also discloses a kind of electric tool with above-mentioned circuit breaking protective system.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, the structural representation of the circuit breaking protective system that Fig. 1 provides for the embodiment of the present invention.
Embodiments provide a kind of circuit breaking protective system; comprise: drive unit 5; to the drive unit power supply unit 6 that drive unit 5 is powered; the controller 4 that accessory drive 5 runs; to the controller power source parts 3 that controller 4 is powered, for being connected with power output end and first current rectifying and wave filtering circuit of powering to controller power source parts 3 and for being connected with power output end and the second current rectifying and wave filtering circuit drive unit power supply unit 6 of powering to drive unit power supply unit 6.
First current rectifying and wave filtering circuit comprises the first rectification part and the first filter capacitor 2, after the first current rectifying and wave filtering circuit is connected with power output end, electric current after the first rectification part rectification again through the first filter capacitor 2 filtering, wherein, first filter capacitor 2 is connected with controller power source parts 3, namely one end of the first filter capacitor 2 is connected with the positive pole of controller power source parts 3, the other end of the first filter capacitor 2 is connected with the negative pole of controller power source parts 3, electric current after rectifying and wave-filtering is powered to controller 4 after controller power source parts 3, run so that controller 4 is energized.
Second current rectifying and wave filtering circuit comprises the second rectification part and the second filter capacitor 7, after the second current rectifying and wave filtering circuit is connected with power output end, electric current after the second rectification part rectification again through the second filter capacitor 7 filtering, wherein, second filter capacitor 7 is connected with motor driving power power supply 6, namely one end of the second filter capacitor 7 is connected with the positive pole of motor driving power power supply 6, the other end of the second filter capacitor 7 is connected with the negative pole of motor driving power power supply 6, electric current after rectifying and wave-filtering is powered to drive unit 5 after motor driving power power supply 6, run so that drive unit 5 is energized.
Wherein, the capacitance of the first filter capacitor 2 is less than the capacitance of the second filter capacitor 7.
Be understandable that, capacitance is directly proportional to the electric charge (capacitance stores electricity) in electric capacity.
The circuit breaking protective system that the embodiment of the present invention provides; because the capacity of the first filter capacitor 2 only runs for driving governor 4; its capacitance stores electrical demand is less; and the capacitance stores electricity of the second filter capacitor 7 needs enough to run for drive unit 5; its capacitance stores electrical demand is more; therefore, in the present embodiment, the capacitance of the first filter capacitor 2 is less than the capacitance of the second filter capacitor 7.Meanwhile, the velocity of discharge of the first filter capacitor 2 is higher than the velocity of discharge of the second filter capacitor 7, and make under powering-off state, the electricity of its inside can discharge within a short period of time by the first filter capacitor 2, cannot power to controller 4.In the case, even if the second filter capacitor 7 still stores by electricity, under not sending at controller 4 state running control signal, drive unit 5 also cannot be made to start.The circuit breaking protective system that the embodiment of the present invention provides, the device avoiding this circuit breaking protective system of application runs under powering-off state, eliminates potential safety hazard.
Preferably, the capacitance span of the second filter capacitor 7 is 1000-3000 μ F, and the capacitance span of the first filter capacitor 2 is 1-100 μ F.
As shown in Figure 1, drive unit power supply unit 6 and controller 4 communicate to connect.That is, whether controller 4 controls drive unit power supply unit 6 and powers to drive unit 5, and then reaches the operation of the start and stop that control drive unit 5.Wherein, drive unit power supply unit 6 can be connected by power line with controller 4, also can be wireless, and introduces no longer in detail at this.
Also controller 4 can be connected, also within protection scope of the present invention with drive unit 5 direct communication.
As shown in Figure 1, in the first embodiment, first rectification part and the second rectification part are bridge rectifier diode parts, being respectively the first rectification part is the first bridge rectifier diode parts 1, second rectification part is the second bridge rectifier diode parts 8, wherein there are four diodes, along the structural arrangement of bridge rectifier.
As shown in Figure 2, in the second embodiment, the first rectification part is full-wave rectification diode part, comprising the first diode 11, second diode 12, transformer 13 and resistance 14, along the structural arrangement of full-wave rectifying circuit; Second rectification part is the second bridge rectifier diode parts 8, wherein has four diodes, along the structural arrangement of bridge rectifier.
First rectification part and the second rectification part all can also be set to full-wave rectification diode part, introduce no longer in detail at this.
In the circuit breaking protective system that the embodiment of the present invention provides, drive unit 5 is DC brushless motor.Also drive unit 5 can be set to other devices, as brush motor.
The embodiment of the present invention additionally provides a kind of electric tool, comprises as any one circuit breaking protective system above-mentioned.Because above-mentioned circuit breaking protective system has above-mentioned technique effect, the electric tool with above-mentioned circuit breaking protective system also should have same technique effect, introduces no longer in detail at this.
Wherein, above-mentioned electric tool can be polishing machine, wall surface grinding machine, annular saw, percussion drill, cutting machine or electric planer etc. any one.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a circuit breaking protective system, it is characterized in that, comprise: drive unit (5), to the drive unit power supply unit (6) that described drive unit (5) is powered, control the controller (4) that described drive unit (5) runs, to the controller power source parts (3) that described controller (4) is powered, for being connected with power output end and first current rectifying and wave filtering circuit of powering to described controller power source parts (3) and for being connected with power output end and the second current rectifying and wave filtering circuit drive unit power supply unit (6) of powering to described drive unit power supply unit (6),
The first filter capacitor (2) that described first current rectifying and wave filtering circuit comprises the first rectification part and is connected with described controller power source parts (3); The second filter capacitor (7) that described second current rectifying and wave filtering circuit comprises the second rectification part and is connected with described motor driving power power supply (6);
The capacitance of described first filter capacitor (2) is less than the capacitance of described second filter capacitor (7).
2. circuit breaking protective system as claimed in claim 1, it is characterized in that, the capacitance span of described second filter capacitor (7) is 1000-3000 μ F, and the capacitance span of described first filter capacitor (2) is 1-100 μ F.
3. circuit breaking protective system as claimed in claim 1, is characterized in that, described drive unit power supply unit (6) and described controller (4) communicate to connect.
4. circuit breaking protective system as claimed in claim 1, it is characterized in that, described first rectification part is the first bridge rectifier diode parts (1).
5. circuit breaking protective system as claimed in claim 1, it is characterized in that, described first rectification part is full-wave rectification diode part.
6. circuit breaking protective system as claimed in claim 1, it is characterized in that, described second rectification part is the second bridge rectifier diode parts (8).
7. the circuit breaking protective system as described in any one of claim 1-6, is characterized in that, described drive unit (5) is DC brushless motor.
8. an electric tool, is characterized in that, comprises the circuit breaking protective system as described in any one of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510874868.9A CN105356443B (en) | 2015-12-02 | 2015-12-02 | Electric tool and its circuit breaking protective system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510874868.9A CN105356443B (en) | 2015-12-02 | 2015-12-02 | Electric tool and its circuit breaking protective system |
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| Publication Number | Publication Date |
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| CN105356443A true CN105356443A (en) | 2016-02-24 |
| CN105356443B CN105356443B (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510874868.9A Active CN105356443B (en) | 2015-12-02 | 2015-12-02 | Electric tool and its circuit breaking protective system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018209605A1 (en) * | 2017-05-17 | 2018-11-22 | 深圳和而泰智能控制股份有限公司 | Brushless electric tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102232265A (en) * | 2008-12-01 | 2011-11-02 | 三菱电机株式会社 | Alternating current-direct current converting apparatus and apparatus for driving electric machinery |
| CN102804593A (en) * | 2010-03-19 | 2012-11-28 | 夏普株式会社 | Motor control device |
| CN104079199A (en) * | 2013-03-29 | 2014-10-01 | Ls产电株式会社 | Medium voltage inverter system |
| CN104662788A (en) * | 2012-09-27 | 2015-05-27 | 大金工业株式会社 | Direct AC power conversion device |
| CN205429722U (en) * | 2015-12-02 | 2016-08-03 | 浙江绿动电机科技有限公司 | Electric tool and power -off protection system thereof |
-
2015
- 2015-12-02 CN CN201510874868.9A patent/CN105356443B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102232265A (en) * | 2008-12-01 | 2011-11-02 | 三菱电机株式会社 | Alternating current-direct current converting apparatus and apparatus for driving electric machinery |
| CN102804593A (en) * | 2010-03-19 | 2012-11-28 | 夏普株式会社 | Motor control device |
| CN104662788A (en) * | 2012-09-27 | 2015-05-27 | 大金工业株式会社 | Direct AC power conversion device |
| CN104079199A (en) * | 2013-03-29 | 2014-10-01 | Ls产电株式会社 | Medium voltage inverter system |
| CN205429722U (en) * | 2015-12-02 | 2016-08-03 | 浙江绿动电机科技有限公司 | Electric tool and power -off protection system thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018209605A1 (en) * | 2017-05-17 | 2018-11-22 | 深圳和而泰智能控制股份有限公司 | Brushless electric tool |
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| CN105356443B (en) | 2019-04-23 |
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