CN208445492U - Electric tool adapter and electrical equipment - Google Patents
Electric tool adapter and electrical equipment Download PDFInfo
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- CN208445492U CN208445492U CN201821146971.7U CN201821146971U CN208445492U CN 208445492 U CN208445492 U CN 208445492U CN 201821146971 U CN201821146971 U CN 201821146971U CN 208445492 U CN208445492 U CN 208445492U
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Abstract
The utility model relates to a kind of electric tool adapter and electrical equipment, electric tool adapter includes electric power conversion unit, detection unit, output voltage adjusting unit and output current regulation unit；Input power is converted to electric tool required voltage by electric power conversion unit, output voltage adjusts unit and output voltage and electric current are compared by output current regulation unit with reference voltage and electric current, issue corresponding feedback adjustment signal, electric power conversion unit is adjusted output voltage and electric current according to adjustment signal, electric tool adapter is set to start and work normally the voltage and current variation tendency under different conditions according to electric tool adaptively to adjust required output voltage and electric current, to improve the power utilization of electric tool adapter, reduce the waste of the energy.
Description
Technical field
The utility model relates to field of power tools, more particularly to a kind of electric tool adapter and electrical equipment.
Background technique
In daily life, especially in field of power tools, electric tool adapter is seen everywhere and plays more next
More important role.Electric tool adapter, which is directly converted to electric main, is suitable for the direct current that electric tool uses.Solution
Common electric tool has been put by dedicated battery pack to provide the limitation of electric energy, has greatly increased the continuous of common electric tool
ETS estimated time of sailing improves the practicability of common electric tool.
However common electric tool on startup required for power and required power often difference when operating normally
Very big, the power headroom that traditional electric tool adapter is designed in the case where meeting electric tool two states is very big, causes in electricity
Power driven tools cause the utilization rate of adapter power to reduce when operating normally, and cause the waste of the energy.
Utility model content
Based on this, it is necessary to which on startup for electric tool, conventional power tool adapter power utilization rate is low to be caused
The problem of energy waste, provides a kind of electric tool adapter that power utilization is high.
A kind of electric tool adapter comprising: electric power conversion unit, detection unit, output voltage adjust unit and defeated
Current regulation unit out.
The input terminal of the electric power conversion unit is for connecting power supply, and the output end of the electric power conversion unit is for connecting
Electric tool, the output end of the electric power conversion unit respectively with the input terminal of the detection unit and the output current regulation
The first input end of unit connects, and the second input terminal of the output end of the detection unit and the output current regulation unit connects
Connect, the output voltage adjust unit output end and the output current regulation unit output end respectively with the electric power
The input terminal of converter unit connects.
The output current regulation unit include first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance,
The output end of first operational amplifier and the first accessory power supply, the first end of the first resistor and the electric power conversion unit connects
It connects, the second end of the first resistor and the first end of the second resistance and the non-inverting input terminal of first operational amplifier
Connection, the second end of the second resistance with output ground for connecting, the first end of the 3rd resistor and first auxiliary
Power supply connection, the first end of the second end of the 3rd resistor and the 4th resistance and first operational amplifier it is anti-
The connection of phase input terminal, the second end of the 4th resistance is for being grounded, the output end and the electricity of first operational amplifier
The connection of the first end of the input terminal of force transformation unit and the 5th resistance, the second end of the 5th resistance and the 4th electricity
The second end of resistance connects.
The output current regulation unit further includes first capacitor in one of the embodiments, and first operation is put
The output end of big device is connect with the first end of the first capacitor, and the of the second end of the first capacitor and the 5th resistance
One end connection.
The detection unit includes the tenth resistance, the first end of the tenth resistance and institute in one of the embodiments,
State second resistance second end connection, the second end of the tenth resistance respectively with the second end of the 4th resistance and the electricity
The negative pole of output end of force transformation unit connects.
It includes the 6th resistance, the 7th resistance, the 8th electricity that the output voltage, which adjusts unit, in one of the embodiments,
Resistance, the 9th resistance, second operational amplifier and the second accessory power supply, the first end of the 6th resistance and the power converter list
The output end connection of member, the second end of the 6th resistance and the first end of the 7th resistance and the first end of the 8th resistance connect
It connects, for being grounded, the second end of the 7th resistance is anti-with the second operational amplifier for the second end of the 8th resistance
The connection of phase input terminal, the non-inverting input terminal of the second operational amplifier is connect with the anode of second accessory power supply, described
For being grounded, the first end of the output end of the second operational amplifier and the 9th resistance connects the cathode of second accessory power supply
It connects, the second end of the 9th resistance is connect with the negative-phase input of the second operational amplifier, second operation amplifier
The output end of device is connect with the electric power conversion unit.
It further includes the second capacitor that the output voltage, which adjusts unit, in one of the embodiments, and second operation is put
The output end of big device is connect with the first end of second capacitor, and the of the second end of second capacitor and the 9th resistance
One end connection, the second end of the 9th resistance are connect with the negative-phase input of the second operational amplifier.
The electric power conversion unit includes control unit and voltage transformation unit, the output electricity in one of the embodiments,
The output end of output end and the output current regulation unit that pressure adjusts unit is connect with described control unit respectively, the control
Unit processed is connect with the voltage transformation unit, and the voltage transformation unit is connect with the detection unit.
The voltage transformation unit includes armature winding, secondary windings and main circuit switch in one of the embodiments, described
The first end of main circuit switch is for connecting power supply, and the second end of the main circuit switch is connect with armature winding, the main electricity
The control terminal of way switch is connect with described control unit, and the armature winding is coupled with the secondary windings.
The main circuit switch includes field effect transistor in one of the embodiments, described control unit with it is described
The grid of field effect transistor connects, and for the source electrode of the field effect transistor for connecting with the power supply, the field-effect is brilliant
The drain electrode of body pipe is connect with one end of the armature winding.
The voltage transformation unit further includes diode and electrolytic capacitor in one of the embodiments, the secondary windings
The anode of first end and diode connects, and the cathode of the diode is connect with the anode of the electrolytic capacitor, the electrolysis electricity
The cathode of appearance is connect with the second end of the secondary windings.
In one embodiment, a kind of electrical equipment, including the electric tool adapter in any of the above-described embodiment.
In above-mentioned electric tool adapter and electrical equipment, when electric tool starting, electric power conversion unit will input electricity
Source is converted to electric tool required voltage, but since electric tool startup stage absorbs high current, output voltage is exported electricity
Pressure and electric current are pulled low, and detection unit detects the output size of current of electric tool adapter, be will test signal and are transmitted to output
Current regulation unit, detection signal are input to the non-inverting input terminal of operational amplifier by second resistance；Electric power conversion unit
Output voltage divides the thermal compensation signal as output electric current measure signal by first resistor and second resistance, passes through operation amplifier
Device compares reference voltage and detection signal and thermal compensation signal, exports corresponding current feedback adjustment signal, to output electric current
It is adjusted.Meanwhile the output voltage of electric power conversion unit is transmitted to output voltage and adjusts unit, voltage regulation unit will export
Voltage is compared operation with reference voltage, issues corresponding Voltage Feedback adjustment signal, electric power conversion unit is according to output electricity
Pressure adjusts the Voltage Feedback adjustment signal that unit issues, and output voltage is adjusted.In this way, electric tool adapter can be adaptive
Start and work normally the voltage and current variation tendency under different conditions according to electric tool with answering, to adjust required output electricity
Pressure and electric current to improve the power utilization of electric tool adapter reduce the waste of the energy, and extra not increasing
Meet the use of electric tool in the case where power capacity and soft activator.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electric tool adapter in one embodiment；
Fig. 2 is the circuit diagram that current regulation unit is exported in one embodiment；
Fig. 3 is the circuit diagram that output voltage adjusts unit in one embodiment；
Fig. 4 is the circuit diagram of electric power conversion unit in one embodiment.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making practical new to this
The disclosure of type understands more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Term used herein is intended merely to description specific embodiment
Purpose, it is not intended that in limitation the utility model.
Please refer to Fig. 1 and Fig. 2, a kind of electric tool adaptation, 10 comprising electric power conversion unit 100, output voltage are adjusted
Unit 200, output current regulation unit 300 and detection unit 400.
The input terminal of the electric power conversion unit 100 is used for connecting power supply, the output end of the electric power conversion unit 100
In connection electric tool, the output end of the electric power conversion unit 100 respectively with the input terminal of the detection unit 400 and described
Export the first input end connection of current regulation unit 300, the output end of the detection unit 400 and the output current regulation
Second input terminal of unit 300 connects, and the output voltage adjusts the output end and the output current regulation unit of unit 200
300 output end is connect with the input terminal of the electric power conversion unit 100 respectively.
The output current regulation unit 300 includes first resistor 301, second resistance 302, the 303, the 4th electricity of 3rd resistor
Hinder the 304, the 5th resistance 305, the first operational amplifier 307 and the first accessory power supply 308, the first end of the first resistor 301
It is connect with the output end of the electric power conversion unit 100, the output end of the electric power conversion unit 100 is Vout in figure, institute
State the same of the second end of first resistor 301 and the first end of the second resistance 302 and first operational amplifier 307
The connection of phase input terminal, (output ground, electric tool adapter are defeated for connecting with output ground for the second end of the second resistance 302
The cathode of outlet), the first end of the 3rd resistor 303 is connect with first accessory power supply 308, wherein the first auxiliary electricity
The voltage in source 308 is 2.5V, the first end of the second end of the 3rd resistor 303 and the 4th resistance 304 and described the
The inverting input terminal of one operational amplifier 307 connects, and the second end of the 4th resistance 304 is for being grounded, first operation
The output end of amplifier 307 is connect with the first end of the input terminal of the electric power conversion unit 100 and the 5th resistance 305,
The second end of 5th resistance 305 is connect with the second end of the 4th resistance 304.It is suitable by the way that such electric tool is arranged
Orchestration, when electric tool starting, input power is converted to electric tool required voltage, detection unit by electric power conversion unit
The output size of current for detecting electric tool adapter will test signal and be transmitted to output current regulation unit, detection signal warp
Cross the non-inverting input terminal that second resistance is input to operational amplifier；The output voltage of electric power conversion unit is connected to by first resistor
The thermal compensation signal as output electric current measure signal is divided with second resistance, is believed reference voltage and detection by operational amplifier
Number and thermal compensation signal compare, export corresponding current feedback adjustment signal, to output electric current be adjusted.Meanwhile electric power becomes
The output voltage for changing unit is transmitted to output voltage and adjusts unit, and voltage regulation unit compares output voltage and reference voltage
Compared with operation, corresponding Voltage Feedback adjustment signal is issued, electric power conversion unit adjusts the voltage that unit issues according to output voltage
Output voltage is adjusted in feedback adjustment signal.In this way, electric tool adapter can adaptively start according to electric tool
With work normally different conditions under voltage and current variation tendency, to adjust required output voltage and electric current, to improve
The power utilization of electric tool adapter reduces the waste of the energy, and is not increasing surplus power capacity and soft activator
In the case where meet the use of electric tool.
It is disturbed to reduce adjustment signal, promotes the stability of output current regulation unit, wherein one embodiment
In, the output current regulation unit 300 further includes first capacitor 306, the output end of first operational amplifier 307 and institute
State the first end connection of first capacitor 306, the first end company of the second end of the first capacitor 306 and the 5th resistance 305
It connects.Since capacitor plays the role of logical high frequency resistance low frequency, the adjustment signal of output is made by first capacitor and the balance of the 5th resistance
Under, the interference to adjustment signal can be reduced, promote the stability of output current regulation unit.
Referring to Fig. 2, the detection unit includes the tenth resistance 401, the tenth resistance in one of the embodiments,
401 first end is connected with the second end of the second resistance 302, and the second end of the tenth resistance is electric with the described 4th respectively
The connection of the negative pole of output end of the second end of resistance and the electric power conversion unit.It is suitable that electric tool is detected by the tenth resistance 401
The output size of current of orchestration will test signal and be transmitted to output electric current measure unit 300.
Fig. 1 and Fig. 3 are please referred to, it includes the 6th resistance that the output voltage, which adjusts single 200, in one of the embodiments,
201, the 7th resistance 202, the 8th resistance 203, the 9th resistance 205, second operational amplifier 204 and the second accessory power supply 207, institute
The first end for stating the 6th resistance 201 is connect with the output end of the electric power conversion unit 100, and the second of the 6th resistance 201
The first end of end and the 7th resistance 202 is connect with the first end of the 8th resistance 203, the second end of the 8th resistance 203
For being grounded, the second end of the 7th resistance 202 is connect with the reverse input end of the second operational amplifier 204, described
The non-inverting input terminal of second operational amplifier 204 is connect with the anode of second accessory power supply 207, second accessory power supply
For being grounded, the output end of the second operational amplifier 204 is connect 207 cathode with the first end of the 9th resistance 205,
The second end of 9th resistance 205 is connect with the negative-phase input of the second operational amplifier 204, and second operation is put
The output end of big device 204 is connect with the input terminal of the electric power conversion unit 100.List is adjusted by the way that such Voltage Feedback is arranged
The output voltage of electric power conversion unit is compared operation by operational amplifier by first circuit, provides corresponding feedback regulation
Signal makes electric power conversion unit according to adjustment signal, obtains the output voltage of electric power conversion unit needs.
It is disturbed to reduce adjustment signal, promotes the stability that output voltage adjusts unit, wherein one embodiment
In, it further includes the second capacitor, the output end of the second operational amplifier and second electricity that the output voltage, which adjusts unit,
The first end of appearance connects, and the second end of second capacitor is connect with the first end of the 9th resistance, the 9th resistance
Second end is connect with the negative-phase input of the second operational amplifier.Since capacitor plays the role of logical high frequency resistance low frequency, output
Regulated voltage signal, under the balanced action by the second capacitor and the 9th resistance, can be reduced the interference to adjustment signal, promoted
The stability of output voltage adjusting unit.
Referring to Fig. 4, the electric power conversion unit 100 includes control unit 120 and becomes in one of the embodiments,
Press unit 110, the output end of the output end of the voltage regulation unit 200 and the current regulation unit 300 respectively with it is described
Control unit 120 connects, and described control unit 110 is connect with the voltage transformation unit 110, the voltage transformation unit 110 and the inspection
Unit 400 is surveyed to connect.Control unit receives the adjustment signal that output voltage adjusts the sending for exporting current regulation unit of unit,
To control voltage transformation unit output required voltage and electric current.
In one of the embodiments, referring to Fig. 4, the voltage transformation unit 110 includes armature winding 111, secondary
Winding 112 and main circuit switch 115, the first end of the main circuit switch 115 is for connecting power supply, the main circuit switch
115 second end is connect with one end of armature winding 111, and the control terminal of the main circuit switch 115 and the control single 120 connect
It connects, the armature winding 111 is coupled with the secondary windings 112.
The main circuit switch includes field effect transistor in one of the embodiments, described control unit with it is described
The grid of field effect transistor connects, and for the source electrode of the field effect transistor for connecting with the power supply, the field-effect is brilliant
The drain electrode of body pipe is connect with one end of the armature winding.In this way, main circuit switch generates PWM under control unit control
(modulation of Pulse Width Modulation pulse width) copped wave, armature winding generate high-frequency alternating under PWM copped wave effect
Voltage makes the voltage at secondary windings both ends be equal to input voltage, PWM duty so that driver transformer generates alternating magnetic field repeatedly
Than and armature winding and the secondary windings turn ratio product, thus realize to output voltage and output electric current regulation.
The voltage transformation unit 110 further includes diode 113 and electrolytic capacitor 114 in one of the embodiments, and described time
The first end of grade winding 112 is connect with the anode of diode 113, the cathode of the diode 113 and the electrolytic capacitor 114
Anode connection, the cathode of the electrolytic capacitor 114 are connect with the second end of the secondary windings 112.Since diode has list
It can be direct current by AC conversion to electric conductivity, electrolytic capacitor has the function of charge and discharge, stablizes electricity so as to provide
Pressure is filtered out the alternate voltage rectification at 112 both ends of secondary windings stable straight by diode 113 and electrolytic capacitor 114
Galvanic electricity pressure provides stable DC for electric tool.
In one embodiment, described control unit 300 use common control IC (integrated circuit,
Integrated circuit), for example, UC3842, this is the prior art, can also be realized using other IC, in the present embodiment, not done superfluous
It states.
In one embodiment, control unit uses UC3842, and specifically, UC3842 has the VDD (work of device inside
Voltage) pin, GATE (gate, door) pin, GND (Ground, ground) pin and FB (Feedback, feedback) pin, wherein
GATE pin with DC power supply for connecting, and the input terminal connection of VDD pin and voltage transformation unit, FB pin and output voltage are adjusted
Unit and output current regulation unit connection, GND pin is for being grounded.
In one embodiment, a kind of electrical equipment, including the electric tool adapter in any of the above-described embodiment.It is electronic
Input power is converted to electric tool required voltage by the electric power conversion unit of tool adapter, output voltage adjust unit and
Output voltage and electric current are compared by output current regulation unit with reference voltage and electric current, issue corresponding feedback regulation letter
Number, electric power conversion unit is adjusted output voltage and electric current according to adjustment signal, keeps electric tool adapter adaptive
Ground starts and works normally the voltage and current variation tendency under different conditions according to electric tool to adjust required output voltage
And electric current reduces the waste of the energy to improve the power utilization of electric tool adapter.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of electric tool adapter characterized by comprising electric power conversion unit, detection unit, output voltage adjust single
Member and output current regulation unit；
For the input terminal of the electric power conversion unit for connecting power supply, the output end of the electric power conversion unit is electronic for connecting
Tool, the output end of the electric power conversion unit respectively with the input terminal of the detection unit and the output current regulation unit
First input end connection, the output end of the detection unit with it is described export current regulation unit the second input terminal connect,
The output end of output end and the output current regulation unit that the output voltage adjusts unit becomes with the electric power respectively
Change the input terminal connection of unit；
The output current regulation unit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, first
Operational amplifier and the first accessory power supply, the first end of the first resistor are connect with the output end of the electric power conversion unit,
The non-inverting input terminal of the first end and first operational amplifier of the second end of the first resistor and the second resistance connects
It connects, the second end of the second resistance is connected for output ground, the first end of the 3rd resistor and first accessory power supply
Connection, the second end of the 3rd resistor and the first end of the 4th resistance and the reverse phase of first operational amplifier are defeated
Enter end connection, for being grounded, the output end and the electric power of first operational amplifier become the second end of the 4th resistance
Change the first end connection of the input terminal and the 5th resistance of unit, second end and the 4th resistance of the 5th resistance
Second end connection.
2. electric tool adapter according to claim 1, which is characterized in that the output current regulation unit further includes
The output end of one capacitor, first operational amplifier is connect with the first end of the first capacitor, and the of the first capacitor
Two ends are connect with the first end of the 5th resistance.
3. electric tool adapter according to claim 1, which is characterized in that the detection unit includes the tenth resistance,
The first end of tenth resistance is connected with the second end of the second resistance, the second end of the tenth resistance respectively with it is described
The second end of 4th resistance and the negative pole of output end connection of the electric power conversion unit.
4. electric tool adapter according to claim 1, which is characterized in that it includes the 6th that the output voltage, which adjusts unit,
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, second operational amplifier and the second accessory power supply, the of the 6th resistance
One end is connect with the output end of the electric power conversion unit, the second end of the 6th resistance and the first end of the 7th resistance
It is connect with the first end of the 8th resistance, the second end of the 8th resistance is for being grounded, the second end of the 7th resistance and institute
State the inverting input terminal connection of second operational amplifier, the non-inverting input terminal of the second operational amplifier and second auxiliary
The anode connection of power supply, the cathode of second accessory power supply is for being grounded, the output end of the second operational amplifier and institute
The first end connection of the 9th resistance is stated, the second end of the 9th resistance and the negative-phase input of the second operational amplifier connect
It connects, the output end of the second operational amplifier is connect with the input terminal of the electric power conversion unit.
5. electric tool adapter according to claim 4, which is characterized in that it further includes that the output voltage, which adjusts unit,
Two capacitors, the output end of the second operational amplifier are connect with the first end of second capacitor, and the of second capacitor
Two ends are connect with the first end of the 9th resistance, the second end of the 9th resistance and the negative of the second operational amplifier
Input terminal connection.
6. electric tool adapter according to claim 1, which is characterized in that the electric power conversion unit includes control unit
And voltage transformation unit, the output voltage adjust unit output end and the output current regulation unit output end respectively with institute
Control unit connection is stated, described control unit is connect with the voltage transformation unit, and the voltage transformation unit is connect with the detection unit.
7. electric tool adapter according to claim 6, which is characterized in that the voltage transformation unit includes armature winding, secondary
Grade winding and main circuit switch, the first end of the main circuit switch is for connecting power supply, the second end of the main circuit switch
It is connect with armature winding, the control terminal of the main circuit switch is connect with described control unit, the armature winding and described time
Grade winding coupled.
8. electric tool adapter according to claim 7, which is characterized in that the main circuit switch includes field effect transistor
Pipe, described control unit connect with the grid of the field effect transistor, the source electrode of the field effect transistor for it is described
Power supply connection, the drain electrode of the field effect transistor are connect with one end of the armature winding.
9. electric tool adapter according to claim 7, which is characterized in that the voltage transformation unit further includes diode and electricity
Capacitor is solved, the first end of the secondary windings and the anode of diode connect, the cathode of the diode and the electrolytic capacitor
Anode connection, the cathode of the electrolytic capacitor connect with the second end of the secondary windings.
10. a kind of electrical equipment, which is characterized in that be adapted to including the electric tool as described in any one of claim 1 to 9
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821146971.7U CN208445492U (en) | 2018-07-19 | 2018-07-19 | Electric tool adapter and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821146971.7U CN208445492U (en) | 2018-07-19 | 2018-07-19 | Electric tool adapter and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208445492U true CN208445492U (en) | 2019-01-29 |
Family
ID=65086077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821146971.7U Active CN208445492U (en) | 2018-07-19 | 2018-07-19 | Electric tool adapter and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208445492U (en) |
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2018
- 2018-07-19 CN CN201821146971.7U patent/CN208445492U/en active Active
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