CN105356443B - Electric tool and its circuit breaking protective system - Google Patents
Electric tool and its circuit breaking protective system Download PDFInfo
- Publication number
- CN105356443B CN105356443B CN201510874868.9A CN201510874868A CN105356443B CN 105356443 B CN105356443 B CN 105356443B CN 201510874868 A CN201510874868 A CN 201510874868A CN 105356443 B CN105356443 B CN 105356443B
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- China
- Prior art keywords
- power
- filter capacitor
- controller
- circuit breaking
- protective system
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of electric tool and its circuit breaking protective systems; circuit breaking protective system includes: driving device; the driving device power supply unit powered to driving device; control the controller of driving device operation; the controller power source component powered to controller, the second current rectifying and wave filtering circuit driving device power supply unit for being connect with power output end and to the first current rectifying and wave filtering circuit of controller power source component power supply and for connecting with power output end and powering to driving device power supply unit；First current rectifying and wave filtering circuit includes the first rectification part and the first filter capacitor, and the first filter capacitor is connect with controller power source component；Second current rectifying and wave filtering circuit includes the second rectification part and the second filter capacitor, and the second filter capacitor is connect with motor driven power power-supply；Capacitance of the capacitance of first filter capacitor less than the second filter capacitor.Circuit breaking protective system provided by the invention avoids power-off operation, eliminates security risk.
Description
Technical field
The present invention relates to power-off protection technical field, in particular to a kind of electric tool and its circuit breaking protective system.
Background technique
In current electric tool, extraneous alternating current is converted into direct current by current rectifying and wave filtering circuit inputs electricity again mostly
In the driving device of power driven tools.
Include motor and the controller for controlling motor operation by taking the electric tool with motor as an example, in electric tool, leads to
Cross start and stop and the speed of service that controller realizes motor.Wherein, motor has the motor power component powered to it, and controller is same
Sample has the controller power source component powered to it.Controller power source and motor power component receive same group of rectifying and wave-filtering electricity
The electric current of road conveying.
But due to needing driving motor to rotate, motor power supply volume is more, this allows for filtered electrical in current rectifying and wave filtering circuit
The capacitance of appearance is larger.After electric tool power-off, more electricity is still stored in filter capacitor.In opening for error shock power driven tools
Guan Hou, electric tool still will start, and there are security risks, easily cause the person or property safety loss.
Therefore, how to avoid power-off from running, eliminate safe hidden trouble, be the technical problem to be solved by the personnel in the art.
Summary of the invention
In view of this, avoiding power-off to run the present invention provides a kind of circuit breaking protective system, eliminating safe hidden trouble.This hair
It is bright to also disclose a kind of electric tool with above-mentioned circuit breaking protective system.
To achieve the above object, the invention provides the following technical scheme:
A kind of circuit breaking protective system, comprising: driving device, the motor driven power power-supply of Xiang Suoshu driving device power supply,
Control the controller of the driving device operation, the controller power source component of Xiang Suoshu controller power supply, for exporting with power supply
End connection and to the controller power source component power the first current rectifying and wave filtering circuit and for connect with power output end and to
Second current rectifying and wave filtering circuit of the motor driven power power-supply power supply；
First current rectifying and wave filtering circuit include the first rectification part and connect with the controller power source component first
Filter capacitor；Second current rectifying and wave filtering circuit include the second rectification part and connect with the motor driven power power-supply
Two filter capacitors；
The capacitance of first filter capacitor is less than the capacitance of second filter capacitor.
Preferably, in above-mentioned circuit breaking protective system, the capacitance value range of second filter capacitor is 1000-
3000 μ F, the capacitance value range of first filter capacitor are 1-100 μ F.
Preferably, in above-mentioned circuit breaking protective system, the motor driven power power-supply and the controller are communicated to connect.
Preferably, in above-mentioned circuit breaking protective system, first rectification part is the first bridge rectifier diode component.
Preferably, in above-mentioned circuit breaking protective system, first rectification part is full-wave rectification diode part.
Preferably, in above-mentioned circuit breaking protective system, second rectification part is the second bridge rectifier diode component.
Preferably, in above-mentioned circuit breaking protective system, the driving device is DC brushless motor.
The embodiment of the invention also provides a kind of electric tools, including circuit breaking protective system as described in any one of the above embodiments.
It can be seen from the above technical scheme that circuit breaking protective system provided by the invention, due to the first filter capacitor
Capacity is only run for drive control device, and capacitor storing electricity demand is less, and the capacitor of the second filter capacitor storage electricity
Amount needs to run for driving device enough, and capacitor storing electricity demand is more, therefore, in the present embodiment, the first filtered electrical
Capacitance of the capacitance of appearance less than the second filter capacitor.Meanwhile first filter capacitor the velocity of discharge be higher than the second filtered electrical
The velocity of discharge of appearance, so that the first filter capacitor can within a short period of time discharge its internal electricity under power blackout situation,
It can not power to controller.In the case, even if the second filter capacitor is still stored by electricity, operation is not issued in controller
In the state of controlling signal, can not also driving device be made to start.Circuit breaking protective system provided by the invention avoids disconnected using this
The device of electric protection system is run under power blackout situation, eliminates security risk.
The present invention also provides a kind of electric tools, including such as above-mentioned any circuit breaking protective system.Due to above-mentioned disconnected
Electric protection system has above-mentioned technique effect, and the electric tool with above-mentioned circuit breaking protective system should also have same technology to imitate
Fruit is no longer discussed in detail herein.
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
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the first circuit breaking protective system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of second of circuit breaking protective system provided in an embodiment of the present invention.
Specific embodiment
The invention discloses a kind of circuit breaking protective systems, avoid power-off from running, eliminate safe hidden trouble.The invention also discloses
A kind of electric tool with above-mentioned circuit breaking protective system.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of circuit breaking protective system provided in an embodiment of the present invention.
The embodiment of the invention provides a kind of circuit breaking protective systems, comprising: driving device 5 is powered to driving device 5
Motor driven power power-supply 6, the controller 4 that control driving device 5 is run, the controller power source component 3 powered to controller 4,
For connect with power output end and to controller power source component 3 power the first current rectifying and wave filtering circuit and be used for and power supply export
The second current rectifying and wave filtering circuit end connection and powered to motor driven power power-supply 6.
First current rectifying and wave filtering circuit include the first rectification part and the first filter capacitor 2, the first current rectifying and wave filtering circuit with
After power output end connection, electric current is filtered after the rectification of the first rectification part using the first filter capacitor 2, wherein first
Filter capacitor 2 is connect with controller power source component 3, i.e. the anode of one end of the first filter capacitor 2 and controller power source component 3 connects
It connects, the other end of the first filter capacitor 2 is connect with the cathode of controller power source component 3, and the electric current after rectifying and wave-filtering is by control
It powers after device power supply unit 3 to controller 4, is run so that controller 4 is powered.
Second current rectifying and wave filtering circuit include the second rectification part and the second filter capacitor 7, the second current rectifying and wave filtering circuit with
After power output end connection, electric current is filtered after the rectification of the second rectification part using the second filter capacitor 7, wherein second
Filter capacitor 7 is connect with motor driven power power-supply 6, i.e. one end of the second filter capacitor 7 and motor driven power power-supply 6
Anode connection, the other end of the second filter capacitor 7 are connect with the cathode of motor driven power power-supply 6, the electric current after rectifying and wave-filtering
It powers after motor driven power power-supply 6 to driving device 5, is run so that driving device 5 is powered.
Wherein, capacitance of the capacitance of the first filter capacitor 2 less than the second filter capacitor 7.
It is understood that capacitance is directly proportional to charge (the capacitor storing electricity) in capacitor.
Circuit breaking protective system provided in an embodiment of the present invention, since the capacity of the first filter capacitor 2 is only for drive control device 4
Operation, capacitor storing electricity demand is less, and the capacitor storing electricity of the second filter capacitor 7 needs to fill for driving enough
5 operations are set, capacitor storing electricity demand is more, and therefore, in the present embodiment, the capacitance of the first filter capacitor 2 is less than
The capacitance of two filter capacitors 7.Meanwhile first filter capacitor 2 the velocity of discharge be higher than the second filter capacitor 7 the velocity of discharge,
So that the first filter capacitor 2 can within a short period of time discharge its internal electricity under power blackout situation, it can not be to controller
4 power supplies.In the case, even if the second filter capacitor 7 is still stored by electricity, operation control signal is not issued in controller 4
In the state of, driving device 5 can not also started.Circuit breaking protective system provided in an embodiment of the present invention avoids disconnected using this
The device of electric protection system is run under power blackout situation, eliminates security risk.
Preferably, the capacitance value range of the second filter capacitor 7 is 1000-3000 μ F, the capacitor of the first filter capacitor 2
Amount value range is 1-100 μ F.
As shown in Figure 1, motor driven power power-supply 6 and controller 4 communicate to connect.That is, controller 4 controls motor driven
Whether power power-supply 6 powers to driving device 5, and then reaches the operation for controlling the start and stop of driving device 5.Wherein, motor drives
Dynamic power power-supply 6 can be connect with controller 4 by power supply line, also be can be wireless, be no longer discussed in detail herein.
Controller 4 can also be connect with 5 direct communication of driving device, also within protection scope of the present invention.
As shown in Figure 1, the first rectification part and the second rectification part are two pole of bridge rectifier in the first embodiment
Pipe portion part, respectively the first rectification part are the first bridge rectifier diode component 1, and the second rectification part is the second bridge rectifier
Diode part 8, wherein there are four diodes for tool, along the structural arrangement of bridge rectifier.
As shown in Fig. 2, the first rectification part is full-wave rectification diode part in second of embodiment, including
First diode 11, the second diode 12, transformer 13 and resistance 14, along the structural arrangement of full-wave rectifying circuit；Second rectification
Component is the second bridge rectifier diode component 8, wherein there are four diodes for tool, along the structural arrangement of bridge rectifier.
First rectification part and the second rectification part can also be disposed as full-wave rectification diode part, herein no longer
It is discussed in detail.
In circuit breaking protective system provided in an embodiment of the present invention, driving device 5 is DC brushless motor.It can also will drive
Device 5 is set as other devices, such as brush motor.
The embodiment of the invention also provides a kind of electric tools, including such as above-mentioned any circuit breaking protective system.Due to
Above-mentioned circuit breaking protective system has above-mentioned technique effect, and the electric tool with above-mentioned circuit breaking protective system should also have similarly
Technical effect is no longer discussed in detail herein.
Wherein, above-mentioned electric tool can appoint for polishing machine, wall surface grinding machine, annular saw, impact drill, cutting machine or electric planer etc.
It anticipates one kind.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of circuit breaking protective system characterized by comprising driving device (5), the electricity of Xiang Suoshu driving device (5) power supply
Motor driving power power supply (6) controls the controller (4) of the driving device (5) operation, the control of Xiang Suoshu controller (4) power supply
Device power supply unit (3) processed, the first rectification filter for connecting with power output end and powering to the controller power source component (3)
Wave circuit and the second rectifying and wave-filtering electricity that is used to connect with power output end and power to the motor driven power power-supply (6)
Road；
First current rectifying and wave filtering circuit includes the first rectification part and the first filter connecting with the controller power source component (3)
Wave capacitor (2)；Second current rectifying and wave filtering circuit includes the second rectification part and connect with the motor driven power power-supply (6)
The second filter capacitor (7)；
The capacitance of first filter capacitor (2) is less than the capacitance of second filter capacitor (7)；Also, described first
The velocity of discharge of filter condenser (2) is higher than the velocity of discharge of second filter capacitor (7).
2. circuit breaking protective system as described in claim 1, which is characterized in that the capacitor of second filter capacitor (7) measures
Value range is 1000-3000 μ F, and the capacitance value range of first filter capacitor (2) is 1-100 μ F.
3. circuit breaking protective system as described in claim 1, which is characterized in that the motor driven power power-supply (6) with it is described
Controller (4) communication connection.
4. circuit breaking protective system as described in claim 1, which is characterized in that first rectification part is the first bridge rectifier
Diode part (1).
5. circuit breaking protective system as described in claim 1, which is characterized in that first rectification part is two pole of full-wave rectification
Pipe portion part.
6. circuit breaking protective system as described in claim 1, which is characterized in that second rectification part is the second bridge rectifier
Diode part (8).
7. circuit breaking protective system as claimed in any one of claims 1 to 6, which is characterized in that the driving device (5) is direct current
Brushless motor.
8. a kind of electric tool, which is characterized in that including such as described in any item circuit breaking protective systems 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105356443A CN105356443A (en) | 2016-02-24 |
| CN105356443B true CN105356443B (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510874868.9A Active CN105356443B (en) | 2015-12-02 | 2015-12-02 | Electric tool and its circuit breaking protective system |
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Families Citing this family (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 |
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| Publication number | Publication date |
|---|---|
| CN105356443A (en) | 2016-02-24 |
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