CN106357131A - Power supply unit for electric tool - Google Patents
Power supply unit for electric tool Download PDFInfo
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- CN106357131A CN106357131A CN201510411538.6A CN201510411538A CN106357131A CN 106357131 A CN106357131 A CN 106357131A CN 201510411538 A CN201510411538 A CN 201510411538A CN 106357131 A CN106357131 A CN 106357131A
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- circuit
- power supply
- control
- drive module
- current
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Abstract
A power supply unit for an electric tool comprises: a power module comprising a short circuit protection circuit, a filter circuit, a start circuit and a rectifying filter circuit, wherein the power module converts an alternating current into a high-voltage direct current through the short circuit protection circuit, the filter circuit, the start circuit and the rectifying filter circuit; a drive module comprising an H-bridge circuit, a control circuit, a protection circuit and a control power supply, wherein the drive module divides the high-voltage direct current into first direct current and second direct current; a power cord connected respectively with the power module and the drive module and used to transmit the high-voltage direct current from the power module to the drive module.
Description
Technical field
The present invention relates to the power supply provisioning technique field of motor, especially use on electric tool
Brshless DC motor power supply device.
Background technology
Circuit structure according to brshless DC motor: brshless DC motor not only needs to motor
The high-voltage DC power supply of coil power supply, and need the control power supply powered to each control circuit, only
In the case of having two kinds of power supplys to power, motor could normal work simultaneously.When using 220v alternating current
As motor power supply when, need to exchange 220v power supply carry out, after rectifying and wave-filtering process, just obtaining
The high-voltage DC power supply powered to motor coil, and control power supply then to pass through reduction voltage circuit, after blood pressure lowering
Control power supply to corresponding, simultaneously because of compact conformation, the limited space of brshless DC motor, so will
High-voltage DC power supply with control power supply be put into outside the body of brshless DC motor, then pass through two groups or
Power line more than two by the body of brshless DC motor and high-voltage DC power supply, control power supply three
Divide and couple together, to constitute a complete brshless DC motor.Above-mentioned motor scheme makes actual
With in can there are two problems, first: because connecting body and the high voltage direct current of brshless DC motor
Source, the power line of control power supply three part are external, so being easily subject to external force in use
Continuous weight or sharp metal sheet slitting, thus can cause high-voltage DC power supply and control power supply straight
Connect short circuit, make high-voltage DC power supply directly intrude into low-voltage circuit under conditions of there is no blood pressure lowering, and then
Each control circuit horse back is made to burn；Second: when use environment need the body of brshless DC motor with
External high-voltage DC power supply and when controlling power supply apart from each other, the body of brshless DC motor with external
High-voltage DC power supply and control power supply between power line can elongated, and work as brshless DC motor defeated
When going out power and continuing to increase, on power line, parasitic inductance, resistance will produce certain loss, simultaneously
On power line, parasitic inductance, resistance will have a strong impact on the quality controlling power supply, so that controlling power supply
Output voltage fluctuation is larger, and output current is unstable, and then affects each control on brshless DC motor
The work of circuit processed, the final performance affecting brshless DC motor, it is therefore necessary to existing technology
Scheme improves.
Content of the invention
Two problems present in power supply plan for the above-mentioned brshless DC motor of solution, the present invention carries
Supply a kind of novel power supply device, it not only enables brshless DC motor and is subject to external force in power line
Continuous weight or sharp metal sheet slitting, and it is also possible to have in the case of causing power line internal short-circuit
Effect protects each control circuit, and brshless DC motor in output larger (more than 800w) and
Under the conditions of power line longer (more than 3m), the output voltage of power supply, electric current is controlled still stably may be used
Lean on, so make brshless DC motor performance still stable, reliable.
For reaching object above, the present invention provides a kind of supply unit of electric tool, comprising:
One power module, it include a short-circuit protection circuit, a filter circuit, a start-up circuit and
One current rectifying and wave filtering circuit, wherein, this power module pass through this short-circuit protection circuit, this filter circuit,
The alternating current inputting is converted into a high voltage direct current by this start-up circuit and this current rectifying and wave filtering circuit；
One drive module, it includes a h bridge circuit, a control circuit, a protection circuit and a control
Power supply processed, wherein, this high voltage direct current is divided into the first unidirectional current and the second unidirectional current by this drive module,
This first unidirectional current is transmitted directly to this h bridge circuit, this h as a power supply of a motor coil
Bridge circuit then according to a control signal, exports the voltage and current signal needed for this motor coil；This
Two unidirectional currents then give this to arrive control power supply, and then the second unidirectional current is converted to a low pressure by this control power supply
Unidirectional current, powers then to this control circuit and this protection circuit；And
One power line, it is connected to this power module and this drive module, for by this high pressure
Unidirectional current is sent to this drive module from this power module.
Preferably, this power line is one or two core power line.
Preferably, this power module is separated with this control power supply.
Preferably, this control power supply is integrated in this drive module.
The alternating current of input is converted into a high voltage direct current by power module by the present invention, then should
High voltage direct current delivers to drive module by two core power lines, followed by drive module by this HVDC
Electricity is divided into two-way, and a road is directly sent to h bridge circuit, h bridge electricity as the power supply of motor coil
Road is then according to control signal, the voltage and current signal needed for output motor coil；Another road is then delivered to
Control power supply, then control power supply that high voltage direct current is converted to low-voltage DC, then give and control electricity
Road and protection circuit are powered.By the design of foregoing circuit structure, can achieve high-voltage DC power supply first
Power supply is separated with controlling, and only connects power module and driving using two core power lines
Module, thus the power line realizing brshless DC motor is being cut by the continuous weight of external force or sharp metal
Cut, and in the case of causing power line internal short-circuit, the short circuit of high-voltage DC power supply only occurs, thus
It is effectively prevented from high-voltage DC power supply and directly intrudes into low-voltage circuit under conditions of not having blood pressure lowering, and make
The situation that control circuit horse back burns is become to occur；Then, because controlling power supply and drive module to melt as one
Body, so controlling power supply to greatly shorten with the distance of each control circuit, and then makes control power supply effective
Avoid the impact of stray inductance on power line, resistance, control the voltage of power supply output, electric current more
Stable, finally make brshless DC motor longer in output larger (more than 800w) and power line
Under the conditions of (more than 3m), the more stable reliability of performance of brshless DC motor.
Object of the present invention, feature, and advantage will be attached in following specific embodiment
Figure, and detailed exposure in claim.
Brief description
Fig. 1 is the electrical schematic of the present invention.
Fig. 2 is the electrical schematic of power module.
Fig. 3 is the electrical schematic of drive module.
Specific embodiment
Refer to Fig. 1, Fig. 2 and Fig. 3, the present invention is a kind of supply unit of electric tool, its bag
Include:
One power module 1, it includes a short-circuit protection circuit 4, a filter circuit 5, starts electricity
Road 6 and a current rectifying and wave filtering circuit 7, wherein, this power module 1 pass through this short-circuit protection circuit 4,
The alternating current inputting is changed by this filter circuit 5, this start-up circuit 6 and this current rectifying and wave filtering circuit 7
Become a high voltage direct current；
One drive module 3, it includes a h bridge circuit 11, a control circuit 9, a protection circuit
10 and one control power supply 8, and wherein, this high voltage direct current is divided into the first unidirectional current by this drive module 3
With the second unidirectional current, this first unidirectional current is transmitted directly to this as a power supply of a motor coil
H bridge circuit 11, this h bridge circuit 11, then according to a control signal, exports needed for this motor coil
Voltage and current signal；This second unidirectional current then gives this to arrive control power supply 8, then this control power supply 8
Second unidirectional current is converted to a low-voltage DC, then gives this control circuit 9 and this protection circuit
10 power supplies；And
One power line 2, it is connected to this power module 1 and this drive module 3, for should
High voltage direct current is sent to this drive 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 drive module 3.
The alternating current of input is converted into a high voltage direct current by power module 1 by the present invention, then
This high voltage direct current delivers to drive module 3 by two core power lines, followed by drive module 3 by this height
Pressure unidirectional current is divided into two-way, and a road is directly sent to h bridge circuit 11 as the power supply of motor coil,
H bridge circuit 11 is then according to control signal, the voltage and current signal needed for output motor coil；Separately
Control power supply 8 is then delivered on one tunnel, then controls power supply 8 that high voltage direct current is converted to low-voltage DC,
Power then to control circuit 9 and protection circuit 10.By the design of foregoing circuit structure, first
Achievable high-voltage DC power supply is separated with control power supply, and is only come using two core power lines
Connect power module 1 and drive module 3, thus realizing the power line of brshless DC motor outside being subject to
The continuous weight of power or sharp metal shearing, and in the case of causing power line internal short-circuit, only occur high
The short circuit of pressure DC source, thus it is straight under conditions of not having blood pressure lowering to be effectively prevented from high-voltage DC power supply
Connect and intrude into low-voltage circuit, and cause control circuit 9 and situation that protection circuit 10 horse back burns goes out
Existing；Then, because controlling power supply 8 to combine together with drive module 3, power supply 8 and control are controlled
The distance of circuit 9 processed and protection circuit 10 greatly shortens, and then so that control power supply 8 is effectively prevented from
Stray inductance, the impact of resistance on power line, control the voltage of power supply 8 output, electric current more stable,
Finally make brshless DC motor in output larger (more than 800w) and the longer (3m of power line
More than) under the conditions of, the more stable reliability of performance of brshless DC motor.
By above-described embodiment, the purpose of the present invention is reached by fully effective.Being familiar with should
The personage of skill should be understood that the present invention includes but is not limited to accompanying drawing and above in specific embodiment
The content of description.The modification of any function and structure principle without departing from the present invention is intended to be included in right
In the scope of claim.
Claims (8)
1. a kind of supply unit of electric tool, comprising:
One power module, it include a short-circuit protection circuit, a filter circuit, a start-up circuit and
One current rectifying and wave filtering circuit, wherein, this power module pass through this short-circuit protection circuit, this filter circuit,
The alternating current inputting is converted into a high voltage direct current by this start-up circuit and this current rectifying and wave filtering circuit；
One drive module, it includes a h bridge circuit, a control circuit, a protection circuit and a control
Power supply processed, wherein, this high voltage direct current is divided into the first unidirectional current and the second unidirectional current by this drive module,
This first unidirectional current is transmitted directly to this h bridge circuit, this h as a power supply of a motor coil
Bridge circuit then according to a control signal, exports the voltage and current signal needed for this motor coil；This
Two unidirectional currents then give this to arrive control power supply, and then the second unidirectional current is converted to a low pressure by this control power supply
Unidirectional current, powers then to this control circuit and this protection circuit；And
One power line, it is connected to this power module and this drive module, for by this high pressure
Unidirectional current is sent to this drive 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
Separated with this control power supply.
4. the supply unit of electric tool according to claim 2, wherein, this power module
Separated with this control power supply.
5. the supply unit of electric tool according to claim 1, wherein, this control power supply
It is integrated in this drive module.
6. the supply unit of electric tool according to claim 2, wherein, this control power supply
It is integrated in this drive module.
7. the supply unit of electric tool according to claim 3, wherein, this control power supply
It is integrated in this drive module.
8. the supply unit of electric tool according to claim 4, wherein, this control power supply
It is integrated in this drive module.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411538.6A CN106357131A (en) | 2015-07-14 | 2015-07-14 | Power supply unit for electric tool |
| PCT/CN2015/088127 WO2017008373A1 (en) | 2015-07-14 | 2015-08-26 | Power supply device of electric tool |
| US15/025,561 US20190149061A1 (en) | 2015-07-14 | 2015-08-26 | Power source device of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510411538.6A CN106357131A (en) | 2015-07-14 | 2015-07-14 | Power supply unit for electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106357131A true CN106357131A (en) | 2017-01-25 |
Family
ID=57842178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510411538.6A Pending CN106357131A (en) | 2015-07-14 | 2015-07-14 | Power supply unit for electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106357131A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640407A (en) * | 2008-07-29 | 2010-02-03 | 和硕联合科技股份有限公司 | Power supply conversion device and method thereof |
| CN201846234U (en) * | 2010-11-04 | 2011-05-25 | 西安伟京电子制造有限公司 | 2W one-way output power module device |
| CN203554757U (en) * | 2013-10-25 | 2014-04-16 | 深圳市镭润科技有限公司 | Electronic device based on DC power-supplying communication |
| CN104052373A (en) * | 2013-03-14 | 2014-09-17 | 通用电气公司 | Motor fault protection system and method |
| CN104506091A (en) * | 2015-01-15 | 2015-04-08 | 广州市超导节能设备制造有限公司 | Delay control circuit of DC motor |
-
2015
- 2015-07-14 CN CN201510411538.6A patent/CN106357131A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640407A (en) * | 2008-07-29 | 2010-02-03 | 和硕联合科技股份有限公司 | Power supply conversion device and method thereof |
| CN201846234U (en) * | 2010-11-04 | 2011-05-25 | 西安伟京电子制造有限公司 | 2W one-way output power module device |
| CN104052373A (en) * | 2013-03-14 | 2014-09-17 | 通用电气公司 | Motor fault protection system and method |
| CN203554757U (en) * | 2013-10-25 | 2014-04-16 | 深圳市镭润科技有限公司 | Electronic device based on DC power-supplying communication |
| CN104506091A (en) * | 2015-01-15 | 2015-04-08 | 广州市超导节能设备制造有限公司 | Delay control circuit of DC motor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170803 Address after: 311800 Zhejiang city of Shaoxing province Zhuji City Genta Road No. 198 Applicant after: Hammer Electric Power Tools Company Address before: 311800 Zhejiang city of Shaoxing province Zhuji City Genta Road No. 198 Applicant before: Renun Mechanical & Electrical Co., Ltd. |
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| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |
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| WD01 | Invention patent application deemed withdrawn after publication |