CN201001026Y - Device for controlling power tool - Google Patents
Device for controlling power tool Download PDFInfo
- Publication number
- CN201001026Y CN201001026Y CNU2007200336130U CN200720033613U CN201001026Y CN 201001026 Y CN201001026 Y CN 201001026Y CN U2007200336130 U CNU2007200336130 U CN U2007200336130U CN 200720033613 U CN200720033613 U CN 200720033613U CN 201001026 Y CN201001026 Y CN 201001026Y
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- resistance
- motor
- cpu
- circuit
- controllable silicon
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- Control Of Electric Motors In General (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model relates to an electric tool controller, which comprises a microswitch K, a relay J, a motor D, a sampling resistance R8, an overload protective circuit, a indication circuit and a power circuit, and also comprises a programming control circuit, a soft start circuit, wherein the programming control circuit comprises a central processing unit CPU and a resistance R4; the soft start circuit comprises a controllable silicon Q connected with a motor D, the CPU is connected with the control electrode of the controllable silicon Q through the resistance R4, the cathode and the anode of the controllable silicon Q are respectively connected with the sampling resistance R8 and the motor D; the sampling resistance R8 is connected with the CPU through a resistance R5; a resistance R7 and a light emitting diode are connected in series and then connected with the CPU. The controllable silicon Q is controlled through the CPU, and the motor is pressurized gradually, thereby the soft-start is realized. When the load exceeds the normal power and the pre-set excess load value, the CPU outputs an impulse signal, the motor switches off power and stops rotating, and the light emitting diode flickers to clue the operator to shut down immediately, thereby the over loading protection is realized. The volume of the utility model is small, the utility model is reliable and steady, and the cost is low.
Description
Technical field
The utility model relates to a kind of control device of electric tool, especially relates to a kind of electric tool with soft start, overload protection performance.
Background technology
Electric tool controller commonly used uses mechanical switch to control mostly, and its mechanism's volume is big, cost is high.Simultaneously, owing to do not possess soft start function, the electric arc that the big electric current during switch starting produces makes the switch contact loss more serious, has shortened the useful life of electric tool.
Summary of the invention
It is little that the technical problems to be solved in the utility model provides a kind of volume with soft start, overload protection performance, the electric tool controller that cost is low.
For addressing the above problem; a kind of electric tool controller of the present utility model; comprise sensitive switch K, relay J, motor D, sampling resistor R8, overload protecting circuit, indicating circuit, power circuit; also comprise programming Control circuit, soft starting circuit; described programming Control circuit comprises central processor CPU, resistance R 4; described soft starting circuit comprises the controllable silicon Q that is connected with motor; described central processor CPU extremely links to each other with the control of controllable silicon Q by resistance R 4, and the cathode and anode of controllable silicon Q connects sample resistance R8, motor D respectively.
As a kind of improvement of the present utility model, described sample resistance R8 also links to each other with central processor CPU by resistance R 5.
As another kind of improvement the of the present utility model, resistance R 7, LED 2 series connection backs link to each other with central processor CPU.
Adopt after such structure, press sensitive switch K engage relay J, the motor D energising, central processor CPU work, control controllable silicon Q increases the input voltage of motor D gradually, realizes the soft start of electric tool.In the electric tool course of work; sampling resistor R8 at random with the number of winning the confidence input central processor CPU; when electric tool loads and exceeds the overload value that is provided with in the central processor CPU; as load greater than 1.3 times of nominal load and when exceeding the overload values that is provided with in the central processor CPU; the central processor CPU computing is sent pulse signal after judging; make the motor D dead electricity by controllable silicon Q; simultaneously; LED 2 constantly glimmers, and the indication electric tool overloads, can not add heavy load again; must shut down immediately; restart then just and can work on, thereby avoided motor to be burnt; prolong useful life, protected electric tool and personal safety.The utility model is used central processor CPU and is controlled, so compact conformation, reliable and stable, volume is little, cost is low.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the control circuit schematic diagram of a kind of electric tool of the present utility model.
Embodiment
Referring to Fig. 1; a kind of electric tool controller of the present utility model; comprise sensitive switch K, relay J, motor D, sampling resistor R8, overload protecting circuit, indicating circuit, power circuit; its improvement is: it also comprises programming Control circuit, soft starting circuit; described programming Control circuit comprises central processor CPU, resistance R 4; described soft starting circuit comprises the controllable silicon Q that is connected with motor D; described central processor CPU extremely links to each other with the control of controllable silicon Q by resistance R 4, and the cathode and anode of controllable silicon Q connects sample resistance R8, motor D respectively.Described power circuit comprises two parts, and its first is made up of through half-wave rectifier D1, voltage-stabiliser tube D2, capacitor C 2 resistance R 1, capacitor C 1, for relay J and LED 1 provide power supply; Its second portion is made up of resistance R 5, capacitor C 3, half-wave rectifier D3, voltage-stabiliser tube D4, capacitor C 4, for central processor CPU provides operating voltage.Described sample resistance R8 also links to each other with central processor CPU by resistance R 5; Resistance R 7, LED 2 series connection backs link to each other with central processor CPU.Press sensitive switch K, electric current flows into the relay J coil, after the relay J adhesive, its master control contacting electric tool major loop, simultaneously, central processor CPU is connected, control controllable silicon Q progressively increases the input voltage of motor D, thereby realizes the soft start of electric tool.At this moment, LED 1 is shinny, shows that electric tool is in normal operating conditions.
In electric tool work; when if load surpasses rated power; when surpassing 1.3 times of rated power; sampling resistor R8 immediately with the number of winning the confidence input central processor CPU; when this overload signal exceeds the default overload value of central processor CPU, central processor CPU output pulse signal then, and make the motor D dead electricity by controllable silicon Q; simultaneously; LED 2 flickers, prompting operation person shuts down immediately, and then presses sensitive switch K; restart; electric tool just can work on, and has avoided motor to be burnt, and plays overload protective function; prolong useful life, ensured the safety of the electric tool and the person.
Claims (3)
1, a kind of electric tool controller; comprise sensitive switch K, relay J, motor D, sampling resistor R8, overload protecting circuit, indicating circuit, power circuit; it is characterized in that: also comprise programming Control circuit, soft starting circuit; described programming Control circuit comprises central processor CPU, resistance R 4; described soft starting circuit comprises the controllable silicon Q that is connected with motor; described central processor CPU extremely links to each other with the control of controllable silicon Q by resistance R 4, and the cathode and anode of controllable silicon Q connects sample resistance R8, motor D respectively.
2, electric tool controller according to claim 1 is characterized in that: described sample resistance R8 also links to each other with central processor CPU by resistance R 5.
3, electric tool controller according to claim 1 is characterized in that: resistance R 7, LED 2 series connection backs link to each other with central processor CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200336130U CN201001026Y (en) | 2007-01-15 | 2007-01-15 | Device for controlling power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200336130U CN201001026Y (en) | 2007-01-15 | 2007-01-15 | Device for controlling power tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201001026Y true CN201001026Y (en) | 2008-01-02 |
Family
ID=39015429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200336130U Expired - Fee Related CN201001026Y (en) | 2007-01-15 | 2007-01-15 | Device for controlling power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201001026Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248522A (en) * | 2010-05-19 | 2011-11-23 | 日立工机株式会社 | Power tool |
| CN105573786A (en) * | 2014-12-14 | 2016-05-11 | 上海兆芯集成电路有限公司 | Apparatus and method to preclude load replays in processor |
| CN109229222A (en) * | 2018-09-20 | 2019-01-18 | 成都山神轨道交通设备有限公司 | It is a kind of can adjust automatically turn to climb building method and device |
-
2007
- 2007-01-15 CN CNU2007200336130U patent/CN201001026Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248522A (en) * | 2010-05-19 | 2011-11-23 | 日立工机株式会社 | Power tool |
| CN102248522B (en) * | 2010-05-19 | 2014-10-15 | 日立工机株式会社 | Power tool |
| US8931576B2 (en) | 2010-05-19 | 2015-01-13 | Hitachi Koki., Ltd. | Power tool for performing soft-start control appropriated for motor load |
| CN105573786A (en) * | 2014-12-14 | 2016-05-11 | 上海兆芯集成电路有限公司 | Apparatus and method to preclude load replays in processor |
| CN109229222A (en) * | 2018-09-20 | 2019-01-18 | 成都山神轨道交通设备有限公司 | It is a kind of can adjust automatically turn to climb building method and device |
| CN109229222B (en) * | 2018-09-20 | 2021-10-08 | 成都山神轨道交通设备有限公司 | Stair climbing method and device capable of automatically adjusting steering |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080102 |