CN204967640U - Electric tool's power supply unit - Google Patents
Electric tool's power supply unit Download PDFInfo
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- CN204967640U CN204967640U CN201520508222.4U CN201520508222U CN204967640U CN 204967640 U CN204967640 U CN 204967640U CN 201520508222 U CN201520508222 U CN 201520508222U CN 204967640 U CN204967640 U CN 204967640U
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Abstract
The utility model provides an electric tool's power supply unit, its includes a power module, includes a short -circuit protection circuit, a filter circuit, a starting circuit and a rectification filter circuit, wherein, this power module becomes a short -circuit protection circuit 1 through the short -circuit protection circuit 0 that this short -circuit protection circuit, this filter circuit, this starting circuit and this rectification filter circuit will input, a drive module, it includes a H bridge circuit, a control circuit, a protection circuit and a control source, wherein, this drive module falls into first direct current and second direct current with this high voltage dc, and a power cord, it is connected respectively in this power module and this drive module for with this high voltage dc from this power module conveying to this drive module.
Description
Technical field
The utility model relates to the power supply provisioning technique field of motor, the power supply device of the brshless DC motor especially used on electric tool.
Background technology
Circuit structure according to brshless DC motor: brshless DC motor not only needs the high-voltage DC power supply of powering to motor coil, and need the control power supply of powering to each control circuit, when only having two kinds of power supplys to power, motor could normal work simultaneously.When the power supply using 220V alternating current as motor, after needing that rectifying and wave-filtering process is carried out to alternating current 220V power supply, just obtain the high-voltage DC power supply of powering to motor coil, control power supply and then pass through reduction voltage circuit, power supply is controlled accordingly after step-down, simultaneously because of the compact conformation of brshless DC motor, limited space, so high-voltage DC power supply and control power supply are put into outside the body of brshless DC motor, then two groups or more power line is passed through by the body of brshless DC motor and high-voltage DC power supply, control power supply three part to couple together, to form a complete brshless DC motor.Can two problems be there is in actual use in above-mentioned motor scheme, first: because connect the body of brshless DC motor and high-voltage DC power supply, the power line of control power supply three part is external, so be in use easily subject to the continuous weight of external force or sharp-pointed metal sheet slitting, thus high-voltage DC power supply and the direct short-circuit controlling power supply can be caused, make high-voltage DC power supply directly intrude into low-voltage circuit under the condition not having step-down, and then each control circuit is burnt at once, second: when environment for use need the body of brshless DC motor and external high-voltage DC power supply and control power supply apart from each other time, the body of brshless DC motor and external high-voltage DC power supply and the power line controlled between power supply can be elongated, and when the power output of brshless DC motor continues to increase, inductance parasitic on power line, resistance will produce certain loss, simultaneously parasitic on power line inductance, resistance controls the quality of power supply by having a strong impact on, so that the output voltage fluctuation controlling power supply is larger, output current is unstable, and then affect the work of each control circuit on brshless DC motor, the final performance affecting brshless DC motor, so be necessary to improve existing technical scheme.
Summary of the invention
For solving the two problems existed in the power supply plan of above-mentioned brshless DC motor, the utility model provides a kind of novel power supply device, it not only can realize brshless DC motor and be subject to the continuous weight of external force or sharp-pointed metal sheet slitting at power line, and when causing power line internal short-circuit, also can each control circuit of available protecting, and brshless DC motor is under power output comparatively large (more than 800W) and power line longer (more than 3M) condition, control the output voltage of power supply, electric current is still reliable and stable, and then the performance of brshless DC motor is still stablized, reliably.
For reaching above object, the utility model provides a kind of supply unit of electric tool, and it comprises:
One power module, it comprises a short-circuit protection circuit, a filter circuit, a start-up circuit and a current rectifying and wave filtering circuit, wherein, this power module converts an alternating current of input to a high voltage direct current by this short-circuit protection circuit, this filter circuit, this start-up circuit and this current rectifying and wave filtering circuit;
One driver module, it comprises a H-bridge circuit, a control circuit, a protective circuit and a control power supply, wherein, this high voltage direct current is divided into the first direct current and the second direct current by this driver module, this first direct current is transmitted directly to this H-bridge circuit as a power supply of a motor coil, this H-bridge circuit, then according to a control signal, exports the voltage and current signal needed for this motor coil; This second direct current then delivers to this control power supply, and then the second direct current is converted to a low-voltage DC by this control power supply, powers then to this control circuit and this protective circuit; And
One power line, it is connected to this power module and this driver module, for this high voltage direct current is sent to this driver module from this power module.
Preferably, this power line is one or two core power line.
Preferably, this power module and this control power supply separated.
Preferably, this control power supply is integrated in this driver module.
The utility model converts the alternating current of input to a high voltage direct current by power module, then this high voltage direct current delivers to driver module by two core power lines, then this high voltage direct current is divided into two-way by driver module again, H-bridge circuit is directly delivered to as the power supply of motor coil in one tunnel, H-bridge circuit then according to control signal, the voltage and current signal needed for output motor coil; Control power supply is then delivered on another road, then controls power supply and high voltage direct current is converted to low-voltage DC, powers then to control circuit and protective circuit.By the design of foregoing circuit structure, first high-voltage DC power supply can be realized separated with control power supply, and only use two core power lines to connect power module and driver module, thus the power line realizing brshless DC motor is being subject to the continuous weight of external force or sharp metal shearing, and when causing power line internal short-circuit, only there is the short circuit of high-voltage DC power supply, thus effectively avoid high-voltage DC power supply directly to intrude into low-voltage circuit under the condition not having step-down, and the situation causing control circuit at once to burn occurs; Then, because control power supply and driver module combine together, so the distance controlling power supply and each control circuit shortens greatly, and then make control power supply efficiently avoid the impact of stray inductance on power line, resistance, the voltage, the electric current that control power supply output are more stable, finally make brshless DC motor under power output comparatively large (more than 800W) and power line longer (more than 3M) condition, the performance of brshless DC motor is more reliable and more stable.
These objects of the present utility model, feature, and advantage will embodiment below, accompanying drawing, and exposure detailed in claim.
Accompanying drawing explanation
Fig. 1 is electrical schematic of the present utility model.
Fig. 2 is the electrical schematic of power module.
Fig. 3 is the electrical schematic of driver module.
Embodiment
Refer to Fig. 1, Fig. 2 and Fig. 3, the utility model is a kind of supply unit of electric tool, and it comprises:
One power module 1, it comprises short-circuit protection circuit 4, filter circuit 5, start-up circuit 6 and a current rectifying and wave filtering circuit 7, wherein, this power module 1 converts an alternating current of input to a high voltage direct current by this short-circuit protection circuit 4, this filter circuit 5, this start-up circuit 6 and this current rectifying and wave filtering circuit 7;
One driver module 3, it comprises H-bridge circuit 11, control circuit 9, protective circuit 10 and and controls power supply 8, wherein, this high voltage direct current is divided into the first direct current and the second direct current by this driver module 3, this first direct current is transmitted directly to this H-bridge circuit 11 as a power supply of a motor coil, this H-bridge circuit 11, according to a control signal, exports the voltage and current signal needed for this motor coil; This second direct current then delivers to this control power supply 8, and then the second direct current is converted to a low-voltage DC by this control power supply 8, powers then to this control circuit 9 and this protective circuit 10; And
One power line 2, it is connected to this power module 1 and this driver module 3, for this high voltage direct current is sent to this driver module 3 from this power module 1.
Preferably, this power line 2 is one or two core power line.
Preferably, this power module 1 is separated with this control power supply 8.
Preferably, this control power supply 8 is integrated in this driver module 3.
The utility model converts the alternating current of input to a high voltage direct current by power module 1, then this high voltage direct current delivers to driver module 3 by two core power lines, then this high voltage direct current is divided into two-way by driver module 3 again, H-bridge circuit 11 is directly delivered to as the power supply of motor coil in one tunnel, H-bridge circuit 11 according to control signal, the voltage and current signal needed for output motor coil; Another road is then delivered to and is controlled power supply 8, then controls power supply 8 and high voltage direct current is converted to low-voltage DC, powers then to control circuit 9 and protective circuit 10.By the design of foregoing circuit structure, first high-voltage DC power supply can be realized separated with control power supply, and only use two core power lines to connect power module 1 and driver module 3, thus the power line realizing brshless DC motor is being subject to the continuous weight of external force or sharp metal shearing, and when causing power line internal short-circuit, only there is the short circuit of high-voltage DC power supply, thus effectively avoid high-voltage DC power supply directly to intrude into low-voltage circuit under the condition not having step-down, and the situation causing control circuit 9 and protective circuit 10 at once to burn occurs; Then; because control power supply 8 to combine together with driver module 3; greatly shorten so control power supply 8 with the distance of control circuit 9 and protective circuit 10; and then make control power supply 8 efficiently avoid the impact of stray inductance on power line, resistance; the voltage, the electric current that control power supply 8 output are more stable; finally make brshless DC motor under power output comparatively large (more than 800W) and power line longer (more than 3M) condition, the performance of brshless DC motor is more reliable and more stable.
By above-described embodiment, the purpose of this utility model is reached by fully effective.The personage being familiar with this skill should be understood that the content that the utility model includes but not limited to accompanying drawing and describes in embodiment above.Any amendment not departing from function and structure principle of the present utility model all will comprise within the scope of the appended claims.
Claims (8)
1. a supply unit for electric tool, it comprises:
One power module, it comprises a short-circuit protection circuit, a filter circuit, a start-up circuit and a current rectifying and wave filtering circuit, wherein, this power module converts an alternating current of input to a high voltage direct current by this short-circuit protection circuit, this filter circuit, this start-up circuit and this current rectifying and wave filtering circuit;
One driver module, it comprises a H-bridge circuit, a control circuit, a protective circuit and a control power supply, wherein, this high voltage direct current is divided into the first direct current and the second direct current by this driver module, this first direct current is transmitted directly to this H-bridge circuit as a power supply of a motor coil, this H-bridge circuit, then according to a control signal, exports the voltage and current signal needed for this motor coil; This second direct current then delivers to this control power supply, and then the second direct current is converted to a low-voltage DC by this control power supply, powers then to this control circuit and this protective circuit; And
One power line, it is connected to this power module and this driver module, for this high voltage direct current is sent to this driver module from this power module.
2. the supply unit of electric tool according to claim 1, wherein, this power line is one or two core power line.
3. the supply unit of electric tool according to claim 1, wherein, this power module and this control power supply separated.
4. the supply unit of electric tool according to claim 2, wherein, this power module and this control power supply separated.
5. the supply unit of electric tool according to claim 1, wherein, this control power supply is integrated in this driver module.
6. the supply unit of electric tool according to claim 2, wherein, this control power supply is integrated in this driver module.
7. the supply unit of electric tool according to claim 3, wherein, this control power supply is integrated in this driver module.
8. the supply unit of electric tool according to claim 4, wherein, this control power supply is integrated in this driver module.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520508222.4U CN204967640U (en) | 2015-07-14 | 2015-07-14 | Electric tool's power supply unit |
| US15/025,561 US20190149061A1 (en) | 2015-07-14 | 2015-08-26 | Power source device of electric tool |
| PCT/CN2015/088127 WO2017008373A1 (en) | 2015-07-14 | 2015-08-26 | Power supply device of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520508222.4U CN204967640U (en) | 2015-07-14 | 2015-07-14 | Electric tool's power supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967640U true CN204967640U (en) | 2016-01-13 |
Family
ID=55062679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520508222.4U Active CN204967640U (en) | 2015-07-14 | 2015-07-14 | Electric tool's power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204967640U (en) |
-
2015
- 2015-07-14 CN CN201520508222.4U patent/CN204967640U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170815 Address after: 311800 Zhejiang city of Shaoxing province Zhuji City Genta Road No. 198 Patentee after: Hammer Electric Power Tools Company Address before: 311800 Zhejiang city of Shaoxing province Zhuji City Genta Road No. 198 Patentee before: Renun Mechanical & Electrical Co., Ltd. |