CN1937375A - Control circuit for electric tool two-purpose power supply - Google Patents
Control circuit for electric tool two-purpose power supply Download PDFInfo
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- CN1937375A CN1937375A CN 200610153589 CN200610153589A CN1937375A CN 1937375 A CN1937375 A CN 1937375A CN 200610153589 CN200610153589 CN 200610153589 CN 200610153589 A CN200610153589 A CN 200610153589A CN 1937375 A CN1937375 A CN 1937375A
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Abstract
The control circuit consists an inverter with a controllable input end (CIE) and a light coupler (IC1). The 2nd winding (L) of the inverter is connected to a rectification/filter (RF) circuit. The input circuit of IC1 is connected in serial between the output end of RF and the ground. The output circuit of IC1 is connected between the CIE of the inverter and the ground of the inverter. What special is that there is a regulation circuit (RC) connecting in serial to the input circuit of IC1. This RC is a current regulation circuit (CRC) and at least possesses a switch. CRC controls the amplitude of the current flowing though IC1 input circuit via operating switches on/off. Comparing with the exited technique, this invention realizes that the same 2nd winding of the inverter can respectively output at least two different stable voltages. The invention can be used both as the power supply of electrical motion tools and for battery charging.
Description
Technical field
The present invention relates to field of power tools, in particular, relate to a kind of control circuit of electric tool two-purpose power supply.
Background technology
Existing electric drill is divided into AC and DC two big classes, the former adopts alternating current machine, directly attaching plug is inserted in the AC Power supply socket and powers, and its defective is to be equipped with oneself the socket of power supply when mobile, afterbody drags live wire during work, thereby is suitable for using in stationary applica-tions; The latter adopts direct current machine, powers with the rechargeable battery packet mode that is plugged under the handle, thereby is suitable for using in mobile occasion, easy to carry, use more flexible, yet its shortcoming exactly is that also the power supply capacity of rechargeable battery bag is limited, once charging at most can only the continuous firing dozens of minutes.
For this reason, my patent No. is that a kind of advantage that had both had the direct power supply use that exchanges electric drill is provided in the formerly Chinese utility model patent " the dual-purpose electric drill of a kind of interchange " of ZL02260261.5 (notification number is CN2569953Y), has the electric drill of AC/DC that D.C. electric drill need not power supply and moves the advantage of use again, it comprises housing, be installed on direct current machine and transmission mechanism in the housing, have on the housing and can hold the cavity that power brick is inserted, and just in corresponding power brick, the position of negative pole just is provided with, the negative pole contact, and include a direct current convert packets, be provided with the AC-DC conversion bag in it, can directly use with the exchange way power supply, and move the occasion of use at needs, then only need to replace existing power brick and get final product.
However, existing power brick still needs special charger, need comprise an ac-dc converter circuit in it undoubtedly again, and this has not only increased manufacturing cost, use also inconvenience, same problem also occurs on the electric tool of other AC/DC.
In fact, no matter be direct current convert packets or charger, its ac-dc converter circuit can directly adopt switching power supply circuit of the prior art.Existing switching power supply circuit has polytype, though concrete circuit has nothing in common with each other, but generally include one have the may command input inverter and one the sampling feedback loop, this sampling feedback loop is with the sampling of the secondary coil output voltage of inverter and feed back to the may command input of inverter, thereby both made the secondary coil output voltage of inverter keep stable, and therefore made again as the secondary end of inverter output and the primary side of inverter to keep isolating by negative feedback.As being in the Chinese utility model patent " multi-functional charger " of ZL01279849.5 (notification number is CN2512121Y) in the patent No., adopt secondary coil with inverter with sampling coil unshakable in one's determination as sampling element, and be connected to 16 pin as pulsewidth modulated intergrated circuit IC1 in the governor circuit of the may command input of inverter; Be in the Chinese utility model patent " rechargeable power tool battery pack quick charger " of ZL02219130.5 (notification number is CN2561153Y) and for example in the patent No., the optocoupler that employing links to each other with the secondary coil output of inverter is as sampling element, and is connected to 7 pin as the special switch integrated circuit (IC) 1 of the may command input of inverter.
Yet, directly adopt existing switching power supply circuit still can't realize not only directly as working power but also as the charge power supply of rechargeable battery pack, reason is the voltage of the working power of electric tool and charge power supply of battery and inequality, and the different required charging voltages of rechargeable battery bag also is not quite similar.A kind of feasible way is, increases secondary coil at the secondary end of inverter, but does like this, not only increased cost, and output end connector increases, and adds that the volume of core window is limited, can't hold more than two the secondary coil with power at all.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of both can be directly can be the control circuit of the electric tool two-purpose power supply of the charging of the rechargeable battery pack in it as working power at above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the control circuit of this electric tool two-purpose power supply, comprise that one has the inverter and an optocoupler (IC1) of may command input, the secondary coil of inverter (L) is connected to a current rectifying and wave filtering circuit, the input circuit string of optocoupler (IC1) is between the output and ground of current rectifying and wave filtering circuit, the output loop of optocoupler (IC1) then is connected between the ground of the controlled input of described inverter and inverter, it is characterized in that also including a string regulating circuit on optocoupler (IC1) input circuit, this regulating circuit is the current regulating circuit with at least one diverter switch, be in respectively under disconnection or the closure state in this diverter switch, this current regulating circuit makes the electric current that flows through optocoupler (IC1) input circuit be respectively different current values.
Described regulating circuit can be the branch hydraulic circuit that is in series by at least two sectional pressure elements, and is parallel with described diverter switch at least one sectional pressure element;
Described regulating circuit also can adopt a triode (BG2) to be core, the grounded emitter of triode (BG2), the collector electrode one tunnel of triode (BG2) connects the output of current rectifying and wave filtering circuit through the 4th resistance (R4), another road connects the input of optocoupler (IC1), the base stage one tunnel of triode (BG2) is through the 3rd sectional pressure element ground connection, another road second sectional pressure element, first sectional pressure element connect the output of current rectifying and wave filtering circuit, and are parallel with described diverter switch on first sectional pressure element;
It is core that described regulating circuit can also adopt an amplifier (IC2), this amplifier (IC2) output connects the input of optocoupler (IC1) through the 6th resistance (R6), the inverting input one tunnel of amplifier (IC2) is through the 5th resistance (R5) ground connection, another Lu Jingdi four resistance (R4) connect the output of current rectifying and wave filtering circuit, the in-phase input end one tunnel of amplifier (IC2) is through the 3rd sectional pressure element ground connection, another road second sectional pressure element, first sectional pressure element connect the output of current rectifying and wave filtering circuit, and are parallel with described diverter switch on first sectional pressure element;
Above-mentioned sectional pressure element can be a resistance, also can be voltage stabilizing didoe.
Above-mentioned diverter switch can be a mechanical switch, also can be electronic switching element, as triode, field effect transistor or controllable silicon etc.
Described current rectifying and wave filtering circuit can pass through diode (D) serial connection electric capacity (C) ground connection simply and constitute, and also can adopt other more complicated available circuits.
Compared with prior art, because the present invention has gone here and there the current regulating circuit of a band diverter switch on optocoupler (IC1) input circuit, disconnection or closure by diverter switch, make the electric current that flows through optocoupler (IC1) input circuit be respectively different current values, and through making optocoupler (IC1) output feed back to the control end of inverter, finally make the same secondary coil of inverter export at least two different stable voltages respectively, thereby both realize can be directly as the power supply of AC/DC bi service electric tool, can be used as the charge power supply of rechargeable battery pack again, and, when diverter switch during more than one, can also be applicable to the AC/DC bi service electric tool of different rated voltages simultaneously, simultaneously, because the conversion of output voltage only needs folding diverter switch simply, and need not to do the adjusting of fine movement, therefore, the present invention has not only reduced the manufacturing cost of product effectively, has solved the problem of the volume deficiency of core window, and more convenient and practical.
Description of drawings
Fig. 1 is a circuit theory schematic diagram of the present invention.
Fig. 2 is the another kind of circuit theory schematic diagram that changes of the present invention.
Fig. 3 is the electrical block diagram of the embodiment of the invention one.
Fig. 4 is the electrical block diagram of the embodiment of the invention two.
Fig. 5 is the electrical block diagram of the embodiment of the invention three.
Fig. 6 is the electrical block diagram of the embodiment of the invention four.
Fig. 7 is the electrical block diagram of the embodiment of the invention five.
Fig. 8 is the electrical block diagram of the embodiment of the invention six.
Fig. 9 is the electrical block diagram of the embodiment of the invention seven.
Figure 10 is the electrical block diagram of the embodiment of the invention eight.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, the control circuit of electric tool two-purpose power supply comprises an inverter and the optocoupler IC1 with may command input CTR, the secondary coil L of inverter is connected to a current rectifying and wave filtering circuit that is made of diode D and capacitor C, the output loop of optocoupler IC1 then is connected between the ground of the controlled input CTR of described inverter and inverter, the input circuit of optocoupler IC1 is then gone here and there between the output and ground of current rectifying and wave filtering circuit with a regulating circuit, and the difference of Fig. 1 and Fig. 2 only is the location swap of regulating circuit and optocoupler IC1;
Described regulating circuit is the current regulating circuit with at least one diverter switch, various ways can be arranged, but all finish same function, promptly be in respectively under disconnection or the closure state in this diverter switch, this current regulating circuit makes the electric current that flows through optocoupler IC1 input circuit be respectively different current values, and concrete circuit form is as described below.
As shown in Figure 3, be embodiments of the invention one, wherein the bleeder circuit of regulating circuit for being in series by two divider resistance R1, R2 wherein also is parallel with first K switch 1 on first resistance R 1; During work, when first K switch 1 disconnects or is closed, the electric current that flows through optocoupler IC1 input circuit is respectively two different current values, feeds back to the control end CTR of inverter by optocoupler IC1 output, makes the secondary coil of inverter export two different stable voltages respectively;
As shown in Figure 4, be embodiments of the invention two, it has increased the divider resistance R3 of a series connection on the basis of embodiment one, and at the two ends of first resistance R 1 and second resistance R 2 second switch K2 in parallel again, pass through like this, the switching combination of K switch 1, K2, can make the electric current that flows through optocoupler IC1 input circuit be respectively three different current values, feed back to the control end CTR of inverter by optocoupler IC1 output, make the secondary coil of inverter export three different stable voltages respectively;
By that analogy, more if desired output voltage only need be connected in series more divider resistance again and paralleling switch gets final product;
As shown in Figure 5, be embodiments of the invention three, only be with the difference of embodiment one, sectional pressure element voltage stabilizing didoe D1, D2 has substituted former resistance R 1, R2, its extra effect is to make output voltage more stable, its concrete principle is: in case when the output voltage of inverter secondary coil L is higher than setting voltage, voltage stabilizing didoe will reverse-conducting, thereby cause on the input circuit of optocoupler IC1, producing instantaneous large-current, feed back to the control end CTR of inverter through optocoupler IC1 output, make the not output of secondary coil L moment of inverter, the power supply of load this moment changes by capacitor C to be provided, simultaneously make the electric current of optocoupler IC1 input circuit come back to normal value again, feed back to the control end CTR of inverter again through optocoupler IC1 output, make the secondary coil L of inverter export normal voltage again;
As shown in Figure 6, be embodiments of the invention four, only be with embodiment one difference, the triode BG1 external with a base stage substituted K switch 1, to adapt to some particular application, certainly, also can substitute with other electronic switching elements such as field effect transistor, controllable silicons;
As shown in Figure 7, be embodiments of the invention five, be with the difference of embodiment one, set up a triode BG2, and divider resistance R1, R2 and the K switch 1 in parallel with resistance R 1 promptly are connected on the base stage of triode BG2, and between the base stage of triode and ground, meet the 3rd divider resistance R3 again, the collector electrode one tunnel of triode BG2 connects the input of optocoupler IC1, one the tunnel connects the output of current rectifying and wave filtering circuit through the 4th resistance R 4, the grounded emitter of triode BG2, present embodiment is actually by triode BG2 the dividing potential drop effect of resistance R 1 and R2 is amplified, and has the voltage stabilizing advantage identical with embodiment four equally.
As shown in Figure 8, be embodiments of the invention six, only be to have substituted resistance R 1, R2, R3 as sectional pressure element with voltage stabilizing didoe D1, D2, D3 with the difference of embodiment five;
As shown in Figure 9, be embodiments of the invention seven, be with the difference of embodiment one, set up an amplifier IC2, and divider resistance R1, R2 and the K switch 1 in parallel with resistance R 1 promptly are connected on the in-phase input end of amplifier IC2, another Lu Jingdi three divider resistance R3 ground connection of the in-phase input end of amplifier IC2, the inverting input one tunnel of amplifier IC2 is through the 6th resistance R 6 ground connection, another Lu Jingdi five resistance R 5 connect the output of current rectifying and wave filtering circuit, and the output of amplifier IC2 connects the input of optocoupler IC1 through the 7th resistance R 7; Present embodiment is actually by amplifier IC2 the dividing potential drop effect of resistance R 1 and R2 is amplified, and has the voltage stabilizing advantage identical with embodiment four equally.
As shown in figure 10, be embodiments of the invention eight, only be to have substituted resistance R 1, R2, R3 as sectional pressure element with voltage stabilizing didoe D1, D2, D3 with the difference of embodiment seven.
The foregoing description three～embodiment eight launches on the basis of Fig. 1, but in fact among each embodiment concrete current regulating circuit all can directly replace in the regulating circuit of Fig. 2, the circuit effect is identical, does not carry so concrete circuit diagram omitted.
Claims (8)
1, a kind of control circuit of electric tool two-purpose power supply, comprise that one has the inverter and an optocoupler (IC1) of may command input, the secondary coil of inverter (L) is connected to a current rectifying and wave filtering circuit, the input circuit string of optocoupler (IC1) is between the output and ground of current rectifying and wave filtering circuit, the output loop of optocoupler (IC1) then is connected between the ground of the controlled input of described inverter and inverter, it is characterized in that also including a string regulating circuit on optocoupler (IC1) input circuit, this regulating circuit is the current regulating circuit with at least one diverter switch, be in respectively under disconnection or the closure state in this diverter switch, this current regulating circuit makes the electric current that flows through optocoupler (IC1) input circuit be respectively different current values.
2, the control circuit of electric tool two-purpose power supply according to claim 1, the branch hydraulic circuit that it is characterized in that serving as reasons described regulating circuit at least two sectional pressure elements are in series, and at least one sectional pressure element, be parallel with described diverter switch.
3, the control circuit of electric tool two-purpose power supply according to claim 1, it is characterized in that described regulating circuit adopts a triode (BG2) to be core, the grounded emitter of triode (BG2), the collector electrode one tunnel of triode (BG2) connects the output of current rectifying and wave filtering circuit through the 4th resistance (R4), another road connects the input of optocoupler (IC1), the base stage one tunnel of triode (BG2) is through the 3rd sectional pressure element ground connection, another road second sectional pressure element, first sectional pressure element connects the output of current rectifying and wave filtering circuit, and is parallel with described diverter switch on first sectional pressure element.
4, the control circuit of electric tool two-purpose power supply according to claim 1, it is characterized in that it is core that described regulating circuit adopts an amplifier (IC2), this amplifier (IC2) output connects the input of optocoupler (IC1) through the 7th resistance (R7), the inverting input one tunnel of amplifier (IC2) is through the 6th resistance (R6) ground connection, another Lu Jingdi five resistance (R5) connect the output of current rectifying and wave filtering circuit, the in-phase input end one tunnel of amplifier (IC2) is through the 3rd sectional pressure element ground connection, another road second sectional pressure element, first sectional pressure element connects the output of current rectifying and wave filtering circuit, and is parallel with described diverter switch on first sectional pressure element.
5,, it is characterized in that described sectional pressure element is a resistance according to the control circuit of the described electric tool two-purpose power supply of arbitrary claim in the claim 1 to 4.
6,, it is characterized in that described sectional pressure element is a voltage stabilizing didoe according to the control circuit of the described electric tool two-purpose power supply of arbitrary claim in the claim 1 to 4.
7,, it is characterized in that described diverter switch is mechanical switch or electronic switching element according to the control circuit of the described electric tool two-purpose power supply of arbitrary claim in the claim 1 to 4.
8,, it is characterized in that described current rectifying and wave filtering circuit is connected in series electric capacity (C) ground connection by diode (D) and forms according to the control circuit of the described electric tool two-purpose power supply of arbitrary claim in the claim 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101535894A CN1937375B (en) | 2006-01-13 | 2006-09-13 | Control circuit for electric tool two-purpose power supply |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610049071.6 | 2006-01-13 | ||
| CN 200610049071 CN1805261A (en) | 2006-01-13 | 2006-01-13 | Dual-purpose power supply control circuit for electric tools |
| CN2006101535894A CN1937375B (en) | 2006-01-13 | 2006-09-13 | Control circuit for electric tool two-purpose power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1937375A true CN1937375A (en) | 2007-03-28 |
| CN1937375B CN1937375B (en) | 2010-05-19 |
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ID=37954714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101535894A Expired - Fee Related CN1937375B (en) | 2006-01-13 | 2006-09-13 | Control circuit for electric tool two-purpose power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1937375B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI673590B (en) * | 2018-07-27 | 2019-10-01 | 威鋒電子股份有限公司 | Multi-port power supply apparatus and operation method thereof |
| US10749430B2 (en) | 2015-03-13 | 2020-08-18 | Positec Power Tools (Suzhou) Co., Ltd. | Power transmission apparatus and control method therefor, and power supply system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1155943A (en) * | 1997-06-02 | 1999-02-26 | Murata Mfg Co Ltd | Switching power unit |
| JP3494403B2 (en) * | 1999-01-27 | 2004-02-09 | Ｔｄｋ株式会社 | Switching power supply |
| US6853563B1 (en) * | 2003-07-28 | 2005-02-08 | System General Corp. | Primary-side controlled flyback power converter |
| CN100414796C (en) * | 2005-03-10 | 2008-08-27 | 上海交通大学 | Voltage undervoltage isolation monitoring circuit |
-
2006
- 2006-09-13 CN CN2006101535894A patent/CN1937375B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10749430B2 (en) | 2015-03-13 | 2020-08-18 | Positec Power Tools (Suzhou) Co., Ltd. | Power transmission apparatus and control method therefor, and power supply system |
| US11601002B2 (en) | 2015-03-13 | 2023-03-07 | Positec Power Tools (Suzhou) Co., Ltd. | Electrical energy transmission apparatus, method for controlling same, and power supply system |
| TWI673590B (en) * | 2018-07-27 | 2019-10-01 | 威鋒電子股份有限公司 | Multi-port power supply apparatus and operation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1937375B (en) | 2010-05-19 |
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