CN102737810A - Working method of permanent magnet coil driving circuit - Google Patents
Working method of permanent magnet coil driving circuit Download PDFInfo
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- CN102737810A CN102737810A CN2012102504244A CN201210250424A CN102737810A CN 102737810 A CN102737810 A CN 102737810A CN 2012102504244 A CN2012102504244 A CN 2012102504244A CN 201210250424 A CN201210250424 A CN 201210250424A CN 102737810 A CN102737810 A CN 102737810A
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Abstract
The invention relates to a working method of a permanent magnet coil driving circuit, which comprises the following steps: respectively providing an H electric bridge composed of first and second low-end switching tubes and an H electric bridge composed of first and second high-end switching tubes, wherein the first low-end switching tube and the second high-end switching tube are a first group of geminate tubes for controlling the energization of the coil, the second low-end switching tube and the first high-end switching tube are a second group of geminate tubes for controlling the energization of the coil, the respective high-end switching tube is connected with a corresponding high-end driving circuit, and the respective low-end switching tube is connected with a corresponding low-end driving circuit; and respectively controlling first and second group geminate tube control circuits which are same in structure, wherein the first and second group geminate tube control circuits respectively belong to the first group of geminate tubes and the second group of geminate tubes, and both the first and second group geminate tube control circuits comprise a comparator, a control circuit and a comparative level circuit. The two groups of geminate tube circuits can be controlled to carry out alternate conduction by adopting two comparators, so that only two permanent magnet combiners and permanent magnet dividers are required for control ports thereof, thereby saving port resources.
Description
Technical field
The present invention relates to a kind of method of work of permanent magnetism coil driver.
Background technology
The type of drive of existing solenoid is that the H bridge circuit that adopts single chip circuit to control the triode formation is realized; Single-chip microcomputer is controlled the two high-end switch pipes that constitute the H electric bridge and low-end switch pipe through four ports respectively and is taken turns conducting; This mode has taken more port resource; If programming goes wrong, occurred exporting the level that makes said two pairs of switching tube conductings simultaneously, then the H electric bridge will burn; Just can control that this two couple is high-end, the low-end switch pipe takes turns conducting so how two inputs are provided; And when two inputs occur making the level of said switching tube conducting simultaneously; Arbitrary group of conducting is the technical barrier of this area to pipe with the drive circuit of avoiding the H electric bridge to burn out at random.
Summary of the invention
The primary technical problem that solves of the present invention provides a kind of one group of method of work to the permanent magnetism coil driver of pipe conducting that is suitable for single input control H electric bridge.
The technical problem of its less important solution of the present invention is a permanent magnetism when closing the input that divides with permanent magnetism and occurring the level of said switching tube conducting simultaneously, the permanent magnetism coil driver of avoiding the H electric bridge to burn out.
For solving the problems of the technologies described above, the present invention provides
The present invention also provides a kind of method of work of permanent magnetism coil driver, comprising:
1. the permanent magnetism by processor output closes the in-phase end that accesses to first comparator 01 and second comparator with the permanent magnetism dividing control signal respectively;
2. be high level if described permanent magnetism closes control signal; And the permanent magnetism dividing control signal is a low level; The in-phase end voltage of then said first comparator is higher than end of oppisite phase voltage; This first comparator output high level makes this first low-end switch pipe Q1 conducting to control first low-side driver circuitry of the first low-end switch pipe Q1;
The high level of said first comparator output also accesses to second control circuit, and second high-end drive circuit that this second control circuit is controlled the second high-end switch pipe Q4 makes the second high-end switch pipe Q4 conducting, and improves the output voltage of the second comparative level circuit;
The permanent magnetism coil L1 that is located between the said first low-end switch pipe Q1 and the second high-end switch pipe Q4 gets;
The output voltage of the second comparative level circuit inputs to the end of oppisite phase of second comparator; The in-phase end voltage of said second comparator is lower than the input voltage of its end of oppisite phase, the then said second comparator output low level; The low level of this second comparator output is controlled second low-side driver circuitry ends the second low-end switch pipe Q2;
The low level of said second comparator output also accesses to first control circuit, and said first control circuit is controlled the first high-end switch tube drive circuit ends the first high-end switch pipe Q3;
3. if described permanent magnetism dividing control signal is a high level; And it is low level that permanent magnetism closes control signal; The in-phase end voltage of then said second comparator is higher than end of oppisite phase voltage; This second comparator output high level makes this second low-end switch pipe Q2 conducting to control second low-side driver circuitry of the second low-end switch pipe Q2;
The high level of said second comparator output also accesses to first control circuit, and first high-end drive circuit that this first control circuit is controlled the first high-end switch pipe Q3 makes the first high-end switch pipe Q3 conducting, and improves the output voltage of the first comparative level circuit;
The permanent magnetism coil L1 that is located between the said second low-end switch pipe Q2 and the first high-end switch pipe Q3 gets;
The output voltage of the first comparative level circuit inputs to the end of oppisite phase of first comparator; The in-phase end voltage of said first comparator is lower than the input voltage of its end of oppisite phase, the then said first comparator output low level; The low level of this first comparator output is controlled first low-side driver circuitry ends the first low-end switch pipe Q1;
The low level of said first comparator output also accesses to second control circuit, and said second control circuit is controlled the second high-end switch tube drive circuit ends the second high-end switch pipe Q4;
Further; For when the first control circuit input is high level; To improve the output voltage of the first comparative level circuit, make first group of all switching tube conducting that can not cause the H electric bridge to management and control system circuit because of mistake input high level (permanent magnetism is combined into high level); Said first control circuit comprises: first, second photoelectrical coupler DA1, DA2; The negative electrode of the said first photoelectrical coupler DA1 is connected with the anode of the second photoelectrical coupler DA2, and the anode that forms the first node J1, the first photoelectrical coupler DA1 on this connecting line is connected with the negative electrode of the second photoelectrical coupler DA2 respectively and this connecting line on the formation second node J2; The said first node J1 is as the output of this first control circuit, and the said second node J2 is as the input of this first control circuit; The emitter of the said first photoelectrical coupler DA1 links to each other with the collector electrode of the said second photoelectrical coupler DA2, and the emitter of the said second photoelectrical coupler DA2 is as the left suspension earth terminal, and the collector electrode of the said first photoelectrical coupler DA1 links to each other with driving power; The collector electrode of the said second photoelectrical coupler DA2 also links to each other with the input of the first high-end switch tube drive circuit; The earth terminal of the said first high-end switch tube drive circuit links to each other with said left suspension earth terminal;
The controlled step of said first control circuit comprises:
When the input high level of the control input end of first control circuit; The said second photoelectrical coupler DA2 ends; The said first photoelectrical coupler DA1 conducting; The driving power of then being located at the said first photoelectrical coupler DA1 collector electrode accesses to the collector electrode of the said second photoelectrical coupler DA2, and inputs to the first high-end switch pipe Q3 through the 14 diode VD14, the 15 resistance R 15, i.e. this first high-end switch pipe conducting;
Also access to the input of the said first comparative level circuit simultaneously when the high level of the control input end of importing said first control circuit; Improve the said first diode VD1 anode potential, and then improve the input voltage of the output voltage of the said first comparative level circuit greater than the in-phase end of said first comparator;
When the input low level of the control input end of first control circuit; The said second photoelectrical coupler DA2 conducting; The said first photoelectrical coupler DA1 ends, and the collector and emitter of the said second photoelectrical coupler DA2 is to said suspension earth terminal short circuit, and promptly this first high-end switch pipe Q3 ends;
Said second control circuit is identical with the structure and the operation principle of first control circuit.
Further; Said permanent magnetism coil driver; Comprise: the H electric bridge that has the first low-end switch pipe Q1 and the second low-end switch pipe Q2 and the first high-end switch pipe Q3 and the second high-end switch pipe Q4 to constitute respectively; Wherein to be that first group of control coil L1 gets electric to pipe for the first low-end switch pipe Q1 and the second high-end switch pipe Q4; The second low-end switch pipe Q2 and the first high-end switch pipe Q3 are second group and control said coil L1 and get that electric each high-end switch pipe links to each other with corresponding high-end drive circuit to pipe that each low-end switch pipe links to each other with corresponding low-side driver circuitry;
Also comprise: control respectively said first, second group to identical first, second of the structure group of pipe to management and control system circuit; Said first, second group all comprises management and control system circuit: comparator, control circuit, comparative level circuit; The in-phase end of said comparator links to each other with external control signal, and its end of oppisite phase links to each other with the output of said comparative level circuit, and the output of this comparator links to each other with the input of said control circuit, said low-side driver circuitry input respectively; The output of said control circuit links to each other with said comparative level circuit control input end; The output of said comparative level circuit links to each other with the end of oppisite phase of the comparator of another group; Said comparator is suitable for when the output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting; Said control circuit is suitable for when said comparator is exported high level; Control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and improve the input voltage of the output voltage of said comparative level circuit greater than the in-phase end of the comparator of said another group; Or during said comparator output low level, control a described high-end drive circuit a corresponding high-end switch pipe is ended; Said comparative level circuit is suitable for providing comparative voltage.
Further, control corresponding high-end drive circuit, make the conducting of said high-end switch pipe or end in order to make comparison circuit; Said control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2; The negative electrode of the said first photoelectrical coupler DA1, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler DA2, and form the first node J1, the second node J2; The said first node J1 is as the output of said control circuit, and the said second node J2 is as the input of this control circuit; The emitter of the said first photoelectrical coupler DA1 links to each other with the collector electrode of the said second photoelectrical coupler DA2; The emitter of the said second photoelectrical coupler DA2 is as corresponding suspension earth terminal, and the collector electrode of the said first photoelectrical coupler DA1 links to each other with driving power; The collector electrode of the said second photoelectrical coupler DA2 also links to each other with the input of said high-end switch tube drive circuit; The earth terminal of said high-end switch tube drive circuit links to each other with said suspension earth terminal.
Further, in order to drive the conducting of high-end switch pipe or to end, the high-end drive circuit of said high-end switch pipe comprises: the 14 diode VD14, the 15 resistance R the 15, the 16 resistance R 16, the three positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13; The anode of said the 14 diode VD14 links to each other with the base stage of the 3rd positive-negative-positive triode V3, an end of the 16 resistance R 16, constitutes the input of said high-end switch tube drive circuit; The collector electrode of the other end of said the 16 resistance R 16, the 3rd positive-negative-positive triode V3, the anode of the 13 voltage-stabiliser tube VD13 link to each other with said suspension earth terminal; The negative electrode of said the 14 diode VD14 links to each other with the emitter of the 3rd positive-negative-positive triode V3, an end of the 15 resistance R 15; The other end of said the 15 resistance R 15 links to each other with the negative electrode of the 13 voltage-stabiliser tube VD13; Output as said high-end drive circuit; And link to each other with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe links to each other with the earth terminal of said high-end switch tube drive circuit.
Further, for when said control circuit input is high level,, make another group can not cause all switching tube conductings of H electric bridge to management and control system circuit because of the mistake input high level to improve the output voltage of said comparative level circuit; Said comparative level circuit comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first diode VD1, the second diode VD2, the 6th capacitor C 6; One end of said first resistance R 1 links to each other with a power supply, and the other end links to each other the other end ground connection of said the 6th capacitor C 6 with said second resistance R 2, an end of the 3rd resistance R 3, an end of the 6th capacitor C 6 respectively; The other end of said second resistance R 2 links to each other with the anode of the said first diode VD1, an end of the 4th resistance R 4, the said first node J1 respectively; The other end of said the 3rd resistance R 3 links to each other with the anode of the said first diode VD1, the negative electrode of the second diode VD2, the end of oppisite phase of comparator respectively; The plus earth of the other end of said the 4th resistance R 4, the said second diode VD2.
Further, in order to drive low-end switch pipe conducting or end, said low side tube drive circuit comprises: the 6th resistance R 6, the 7th resistance R 7, the three diode VD3, a NPN type triode V1, the 4th voltage-stabiliser tube VD4; One end of said the 6th resistance R 6 links to each other with the output of said comparator; The other end links to each other with the anode of said the 3rd diode VD3, the base stage of a NPN type triode V1; The emitter of a said NPN type triode V1 links to each other with an end of the negative electrode of the 3rd diode VD3, said the 7th resistance R 7, and the said other end of the 7th resistance R 7 of stating links to each other with the negative electrode of the 4th voltage-stabiliser tube VD4, the base stage of corresponding low-end switch pipe; The grounded collector of the anode of said the 4th voltage-stabiliser tube VD4, a NPN type triode V1.
Further, in order to prevent the input signal shake, the in-phase end of said comparator links to each other with an input resistance, ground capacity.
In this circuit, said first, second group is to the incoming level scope of management and control system circuit, i.e. the incoming level scope of first, second comparator, high level 5v, low level 0v.
Power supply in the said comparative level circuit is the voltage source greater than 5V, generally gets 5-20V, gets 13V the best, also can be according to the type of the comparator of selecting for use the power values of suitable adjustment comparative level circuit.
The power supply of comparator is according to corresponding comparator-type, and general desirable 5-20V gets 13V the best.
The present invention has the following advantages: (1) two comparator just can be controlled two groups the pipe circuit take turns conducting, closes and the permanent magnetism branch so its control port also needs only two permanent magnetism, has practiced thrift port resource; (2) comparator, control circuit, comparative level circuit cooperating; Can improve the output voltage of comparative level circuit; When preventing another comparator in-phase input end mistake input high level; Promptly the in-phase end of two comparators is simultaneously during input high level, and two groups to pipe the situation of conducting take place all, avoid the H electric bridge to burn; (3) connect a ground capacity at in-phase end, have anti-shake function; (4) base stage of each the 3rd, the 4th PNP triode of high-end switch tube drive circuit link to each other with emitter the 12, the 14 diode can prevent effectively that drive circuit from transshipping.
Description of drawings
For content of the present invention is more clearly understood, below basis specific embodiment and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the structural representation of permanent magnetism coil driver of the present invention;
Fig. 2 is the structural representation of the H electric bridge of permanent magnetism coil driver of the present invention;
Fig. 3 is the circuit diagram of permanent magnetism coil driver of the present invention;
Fig. 4 is the first control circuit and the first high-end drive circuit figure of permanent magnetism coil driver of the present invention;
Fig. 5 is first comparison circuit, the second comparative level circuit and the first low-side driver circuitry figure of permanent magnetism coil driver of the present invention;
Fig. 6 is the second control circuit and the second high-end drive circuit figure of permanent magnetism coil driver of the present invention;
Fig. 7 is second comparison circuit, the first comparative level circuit and the second low-side driver circuitry figure of permanent magnetism coil driver of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated:
Embodiment 1
See Fig. 1,2; A kind of permanent magnetism coil driver; Comprise: the H electric bridge that has the first low-end switch pipe Q1 and the second low-end switch pipe Q2 and the first high-end switch pipe Q3 and the second high-end switch pipe Q4 to constitute respectively; Wherein to be that first group of control coil L1 gets electric to pipe for the first low-end switch pipe Q1 and the second high-end switch pipe Q4; The second low-end switch pipe Q2 and the first high-end switch pipe Q3 are second group and control said coil L1 and get that electric each high-end switch pipe links to each other with corresponding high-end drive circuit to pipe that each low-end switch pipe links to each other with corresponding low-side driver circuitry;
Also comprise: control respectively said first, second group to identical first, second of the structure group of pipe to management and control system circuit; Said first pair of management and control system circuit 1, second group all comprise management and control system circuit 2: comparator, control circuit, comparative level circuit;
The in-phase end of said comparator links to each other with external control signal, and its end of oppisite phase links to each other with the output of said comparative level circuit, and the output of this comparator links to each other with the input of said control circuit, said low-side driver circuitry input respectively;
The output of said control circuit links to each other with said comparative level circuit control input end;
The output of said comparative level circuit links to each other with the end of oppisite phase of the comparator of another group;
Said comparator is suitable for when the output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting;
Said control circuit is suitable for when said comparator is exported high level; Control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and improve the input voltage of the output voltage of said comparative level circuit greater than the in-phase end of the comparator of said another group; Or during said comparator output low level, control a described high-end drive circuit a corresponding high-end switch pipe is ended;
Said comparative level circuit is suitable for providing comparative voltage.
Wherein, See Fig. 4; Said control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2, the negative electrode of the said first photoelectrical coupler DA1, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler DA2, and form the first node J1, the second node J2; The said first node J1 is as the output of said control circuit, and the said second node J2 is as the input of this control circuit; The emitter of the said first photoelectrical coupler DA1 links to each other with the collector electrode of the said second photoelectrical coupler DA2; The emitter of the said second photoelectrical coupler DA2 is as corresponding suspension earth terminal, and the collector electrode of the said first photoelectrical coupler DA1 links to each other with driving power; The collector electrode of the said second photoelectrical coupler DA2 also links to each other with the input of said high-end switch tube drive circuit; The earth terminal of said high-end switch tube drive circuit links to each other with said suspension earth terminal.
Said control circuit also comprises: the 15 diode VD15, second capacitor C 2; One end of the negative electrode of said the 15 diode VD15 and second capacitor C 2 links to each other with said driving power; The other end of the anode of said the 15 diode VD15 and second capacitor C 2 links to each other with said suspension earth terminal.
See Fig. 4, the high-end drive circuit of said high-end switch pipe comprises: the 14 diode VD14, the 15 resistance R the 15, the 16 resistance R 16, the three positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13; The anode of said the 14 diode VD14 links to each other with the base stage of the 3rd positive-negative-positive triode V3, an end of the 16 resistance R 16, constitutes the input of said high-end switch tube drive circuit; The collector electrode of the other end of said the 16 resistance R 16, the 3rd positive-negative-positive triode V3, the anode of the 13 voltage-stabiliser tube VD13 link to each other with said suspension earth terminal; The negative electrode of said the 14 diode VD14 links to each other with the emitter of the 3rd positive-negative-positive triode V3, an end of the 15 resistance R 15; The other end of said the 15 resistance R 15 links to each other with the negative electrode of the 13 voltage-stabiliser tube VD13; Output as said high-end drive circuit; And link to each other with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe links to each other with the earth terminal of said high-end switch tube drive circuit.
See Fig. 5, said comparative level circuit comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first diode VD1, the second diode VD2, the 6th capacitor C 6; One end of said first resistance R 1 links to each other with a power supply, and the other end links to each other the other end ground connection of said the 6th capacitor C 6 with said second resistance R 2, an end of the 3rd resistance R 3, an end of the 6th capacitor C 6 respectively; The other end of said second resistance R 2 links to each other with the anode of the said first diode VD1, an end of the 4th resistance R 4, the said first node J1 respectively; The other end of said the 3rd resistance R 3 links to each other with the anode of the said first diode VD1, the negative electrode of the second diode VD2, the end of oppisite phase of comparator respectively; The plus earth of the other end of said the 4th resistance R 4, the said second diode VD2.
Said low side tube drive circuit comprises: the 6th resistance R 6, the 7th resistance R 7, the three diode VD3, a NPN type triode V1, the 4th voltage-stabiliser tube VD4; One end of said the 6th resistance R 6 links to each other with the output of said comparator; The other end links to each other with the anode of said the 3rd diode VD3, the base stage of a NPN type triode V1; The emitter of a said NPN type triode V1 links to each other with an end of the negative electrode of the 3rd diode VD3, said the 7th resistance R 7, and the said other end of the 7th resistance R 7 of stating links to each other with the negative electrode of the 4th voltage-stabiliser tube VD4, the base stage of corresponding low-end switch pipe; The grounded collector of the anode of said the 4th voltage-stabiliser tube VD4, a NPN type triode V1.
The in-phase end of said comparator links to each other with an input resistance, ground capacity.
See that Fig. 3-7, particularly Fig. 6,7 show second control circuit and the second high-end drive circuit figure and second comparison circuit, the first comparative level circuit and the second low-side driver circuitry figure; Its structure and first control circuit, first high-end drive circuit, the second comparative level circuit and first low-side driver circuitry are identical.
See Fig. 1, said first pair of management and control system circuit 1, second group all comprise management and control system circuit 2: comparator, control circuit, comparative level circuit; At present with each group to management and control system circuit grouping, promptly said first pair of management and control system circuit 1 comprises: first comparator 101, second control circuit 103, the second comparative level circuit 105; Said second pair of management and control system circuit 2 comprises: second comparator 201, first control circuit 203, the first comparative level circuit 205.
The structure of respectively organizing said comparator, control circuit, comparative level circuit in this execution mode is identical, so circuit no longer repeats expression; Components and parts model and circuit resistance that this each circuit of execution mode is shown at present are following:
R1=R3=R4=R8=R9=R11=10KΩ
R2=R5=R6=R10=R12=R13=2.2kΩ
R7=R15=R18=R14=39Ω
R16=R17=47?kΩ
The power supply of comparative level circuit is got 13V, and the power supply of comparator is got 13V.
Comparator can adopt the operational amplifier that is in open loop situations; The operational amplifier that is in open loop situations has non-linear characteristics, and promptly in-phase end voltage ratio end of oppisite phase voltage is high, and the output high level (equals the maximum of amplifier operating voltage; Power positive end of the present invention meets 13V; So the output high level is 13V), in-phase end voltage ratio end of oppisite phase voltage is low, and output low level (equals the minimum value of amplifier operating voltage; Power supply one end ground connection of the present invention is so low level is output as 0V).
A kind of permanent magnetism coil driver of the present invention is applicable to by NPN, positive-negative-positive switching tube, the H bridge circuit that perhaps various metal-oxide-semiconductors constitute.
See Fig. 3, Fig. 3 shows the physical circuit execution mode and the principle of this switching tube drive circuit; For for simplicity, same or analogous components and parts adopt same or analogous label; In this embodiment, comparator adopts the dual comparator integrated circuit, changes U1A into so the label of first comparator changes the label of U1B, second comparator into.
Switching tube can adopt metal-oxide-semiconductor to replace on the basis of embodiment 1, and the drive principle of H electric bridge is following:
This circuit takes into full account the driving reliability of H electric bridge, avoids the straight-through of upper and lower bridge arm during circuit design fully, concrete truth table such as following table 1:
The driving truth table of table 1 H electric bridge
The operation principle of this circuit is following: this circuit mainly contains two comparators, four optocouplers and a small amount of several passive device to be formed, and the switching tube described in this execution mode is a metal-oxide-semiconductor.
The 4th voltage-stabiliser tube VD4 wherein; The 5th voltage-stabiliser tube VD5; The 12 voltage-stabiliser tube VD12, the 13 voltage-stabiliser tube VD13 are respectively the grid overvoltage protection voltage-stabiliser tube of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4, for inductive load; When the high-end switch pipe breaks off, the electric current fly-wheel diode of can flowing through.Because the resonance between inductance and the parasitic capacitance, the voltage on the grid of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 possibly rise to overvoltage condition.This overvoltage protection voltage-stabiliser tube is got the 13V Zener diode voltage on the grid is carried out clamp, thereby avoids overpressure conditions; The 7th resistance R the 7, the 17 resistance R the 17, the 14 resistance R the 14, the 15 resistance R 15 is a gate driving resistance, selects according to required tSW. switching time.Be meant the charge Q gd and the required time of Qgs that Cgd, Cgs and switching tube are charged to requirement switching time; The one PNP triode V1, the 2nd PNP triode V2, the 3rd PNP triode V3, the 4th PNP triode V4 turn-offs triode fast for each switching tube, guarantees that switching tube quick (in the time of delicate level) gets into cut-off region from the saturation region.The 3rd diode VD3; The 6th diode VD6; The 11 diode VD11, the 14 diode VD14 are the open wireless tunnel of the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4, guarantee the reliable conducting of each switching tube.More than all devices form the most basic drive circuit of the pipe that opens the light.
Permanent magnetism divides permanent magnetism to be combined into the Transistor-Transistor Logic level signal that processor sends, and this level signal is sent into behind the comparator directly driving switch pipe since high-end be different with the driving power of low side.The driving voltage of low side is reference with ground, and therefore this driving is directly supplied by DC power supply, and the output of comparator directly drives the first low-end switch pipe Q1 and the second low-end switch pipe Q2.Yet high-end is unsettled, therefore needs to use the bootstrapping drive circuit, and its operation principle is described below.Observe Fig. 3 or Fig. 4, shown in the left side of H bridge circuit, the bootstrapping drive circuit utilizes second capacitor C the 2, the 15 diode VD15 to realize.The overvoltage protection of bootstrap capacitor is accomplished by the 15 diode VD15, as stated, for inductive load, when the high-end switch pipe breaks off, the electric current fly-wheel diode of can flowing through.Because the resonance between inductance and the parasitic capacitance, the voltage on the electric capacity possibly rise to overvoltage condition.13 V Zener diodes the 15 diode VD15 carries out clamp to the voltage on the electric capacity, thereby avoids overpressure conditions.
The 8th resistance R 8 in first resistance R 1 in the said first comparative level circuit, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the second comparative level circuit, the 9th resistance R 9, the tenth resistance R the 10, the 11 resistance R 11 constitute the end of oppisite phase level distributor of the first comparator U1B and the second comparator B1A respectively; With the first comparator U1B and the second comparator U1A, the first photoelectrical coupler DA1; The second photoelectrical coupler DA2; The 3rd photoelectrical coupler DA3; The 4th photoelectrical coupler DA4 constitutes jointly logic control, to realize the driving logic in the table.
During normality, generally permanent magnetism branch, permanent magnetism close does not have the signal input, promptly all is 0V (TTL low level); Since the first comparator U1B and the second comparator B1A the end of oppisite phase level be resistor network, all the positive terminal than each comparator is high in any case, according to the characteristic of comparator; The output pin output of two comparators is 0V forever, a PNP triode V1, the 2nd PNP triode V2 conducting; The first low-end switch pipe Q1, the second low-end switch pipe Q2 is turned off, and the negative electrode of the second photoelectrical coupler DA2 that links to each other with the output of the second comparator U1A and the anode of the first photoelectrical coupler DA1 also are pulled to 0V; The second photoelectrical coupler DA2 forms loop conducting, the 3rd PNP triode V3 conducting through second resistance R, 2, the first resistance R 1 with the 13V power supply; The first high-end switch pipe Q3 turn-offs, and the end of oppisite phase of the first comparator U1B is obtained the comparative level that the branch pressure voltage 3V in the second photoelectrical coupler DA2 conducting loop closes as permanent magnetism, the first diode VD1 through the 3rd resistance R 3; The second diode VD2 is the reverse-phase protection circuit of the end of oppisite phase of the first comparator U1B, and the 6th capacitor C 6, the seven capacitor C 7 are de-twitter circuit; Prevent instantaneous interference, increase the stability of circuit.This moment, the first photoelectrical coupler DA1 was owing to there not being the conducting loop to close (its anode and negative electrode are all low level).In like manner, the negative electrode of the 4th photoelectrical coupler DA4 that links to each other with the output of the first comparator U1B and the anode of the 3rd photoelectrical coupler DA3 also are pulled to 0V, and the 4th photoelectrical coupler DA4 is through the tenth resistance R 10; The 8th resistance R 8 forms the loop conducting with the 13V power supply; The 4th PNP triode V4 conducting, the second high-end switch pipe Q4 turn-offs, and the end of oppisite phase of the second comparator U1A is obtained the comparative level of the branch pressure voltage 3V in the 4th photoelectrical coupler DA4 conducting loop as the permanent magnetism branch through the 8th resistance R 8; The 7th diode VD7; The 8th diode VD8 is the reverse-phase protection circuit of the end of oppisite phase of the second comparator U1A, and the 4th capacitor C 4, the five capacitor C 5 are de-twitter circuit; Prevent instantaneous interference, increase the stability of circuit.This moment, the 3rd photoelectrical coupler DA3 was owing to there not being the conducting loop to close (its anode and negative electrode are all low level).
The timesharing of control permanent magnet mechanism is input as 5V (TTL high level) when the permanent magnetism branch has signal, and permanent magnetism closes does not have signal to be input as 0V (TTL low level); This moment, the in-phase end level of the second comparator U1A was the end of oppisite phase 3V that 5V is higher than this comparator U1A; The 1 pin output 13V high level of this comparator U1A is through the 13 resistance R 13, the six diode VD6; The 14 resistance R 14; Make the second low-end switch pipe Q2 conducting, the negative electrode of the second photoelectrical coupler DA2 that the output of the second comparator U1A links to each other also is pulled to 13V with the anode that is pulled to the 13V first photoelectrical coupler DA1, and the first photoelectrical coupler DA1 is through the 4th resistance R 4 and the formation loop conducting of power supply ground; Driving power is through the collector electrode of the first photoelectrical coupler DA1; Emitter the 14 diode VD14 of the first photoelectrical coupler DA1, the 15 resistance R 15 makes the high-end switch pipe Q3 conducting of winning; The end of oppisite phase of the first comparator U1B is obtained the comparative level that the branch pressure voltage 12V in the first photoelectrical coupler DA1 conducting loop closes as permanent magnetism through the 3rd resistance R 3; Raise by force comparative level permanent magnetism close (Transistor-Transistor Logic level 0-5V) is forced shielding, guarantees that the output of the first comparator U1B is output as 0V, this moment the second photoelectrical coupler DA2 owing to there not being the conducting loop to close (its anode and negative electrode are all high level).The negative electrode of the 4th photoelectrical coupler DA4 that the output of the first comparator U1B links to each other and the anode of the 3rd photoelectrical coupler DA3 also are pulled to 0V; The 4th photoelectrical coupler DA4 is through the tenth resistance R 10; The 8th resistance R 8 forms the loop conducting with the 13V power supply; The 4th PNP triode V4 conducting makes the second high-end switch pipe Q4 turn-off, and the end of oppisite phase of the second comparator U1A is obtained the comparative level of the branch pressure voltage 3V in the 4th photoelectrical coupler DA4 conducting loop as the permanent magnetism branch through the 8th resistance R 8.Therefore the first high-end switch pipe Q3 and the second low-end switch pipe Q2 conducting drives permanent magnet mechanism and carries out sub-switching operation.This process revert to normality after accomplishing through pulse, and promptly generally permanent magnetism branch, permanent magnetism close and do not have the signal input; Promptly all be 0V (TTL low level); Thereby make the PNP triode V1 that wins, the 2nd PNP triode V2, the 3rd PNP triode V3; The 4th PNP triode V4 conducting, therefore the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 turn-off.
The control permanent magnet mechanism is fashionable, is input as 5V (TTL high level) when permanent magnetism has closed pulse signal, and the permanent magnetism branch does not have signal to be input as 0V (TTL low level); This moment, the in-phase end level of the first comparator U1B was the end of oppisite phase 3V that 5V is higher than this comparator U1B, and the output output 13V high level of the first comparator U1B is through the 6th resistance R 6; The 3rd PNP diode VD3; The 7th resistance R 7 makes the low-end switch pipe Q1 conducting of winning, and the negative electrode of the 4th photoelectrical coupler DA4 that links to each other with the output of the first comparator U1B and the anode of the 3rd photoelectrical coupler DA3 also are pulled to 13V; The 3rd photoelectrical coupler DA3 forms the loop conducting through the 11 resistance R 11 and power supply ground; Driving power is through the collector electrode of the 3rd photoelectrical coupler DA3, emitter the 11 diode VD11 of the 3rd photoelectrical coupler DA3, the 18 resistance R 18; Make the second high-end switch pipe Q4 conducting; The end of oppisite phase of the second comparator U1A is obtained the comparative level that the branch pressure voltage 12V in the 3rd photoelectrical coupler DA3 conducting loop closes as permanent magnetism through the 9th resistance R 9, raises comparative level by force, and (Transistor-Transistor Logic level 0-5V) is forced shielding to the permanent magnetism branch; The output of guaranteeing the second comparator U1A is output as 0V, and this moment, the 4th photoelectrical coupler DA4 was owing to there not being the conducting loop to close (its anode and negative electrode are all high level).The negative electrode of the second second photoelectrical coupler DA2 that link to each other than the output of device U1A and the anode of the first photoelectrical coupler DA1 also are pulled to 0V; The second photoelectrical coupler DA2 is through second resistance R 2; First resistance R 1 forms the loop conducting with the 13V power supply; The 3rd PNP triode V3 conducting is turn-offed the high-end switch pipe Q3 that wins, and the end of oppisite phase of the first comparator U1B is obtained the comparative level of the branch pressure voltage 3V in the second photoelectrical coupler DA2 conducting loop as the permanent magnetism branch through the 3rd resistance R 3.Therefore the first low-end switch pipe Q1 and the second high-end switch pipe Q4 conducting drives permanent magnet mechanism and carries out closing operation.This process is advanced after pulse accomplishes, and revert to normality, and promptly generally permanent magnetism branch, permanent magnetism close and do not have the signal input; Promptly all be 0V (TTL low level); Thereby make the PNP triode V1 that wins, the 2nd PNP triode V2, the 3rd PNP triode V3; The 4th PNP triode V4 conducting, therefore the first low-end switch pipe Q1, the second low-end switch pipe Q2, the first high-end switch pipe Q3, the second high-end switch pipe Q4 turn-off.
Illegal state promptly all has pulse signal to be input as 5V (TTL high level) when permanent magnetism closes, permanent magnetism divides, and is illegal state; Microprocessor can not send such signal; Even permanent magnetism closes when unusual, permanent magnetism divides the 5V high level that TTL is all arranged input, conducting is respectively organized the first low-end switch pipe Q1, the second high-end switch pipe Q4 or the second low-end switch pipe Q2 at random; The first high-end switch pipe Q3; Prevent the first low-end switch pipe Q1, the first high-end switch pipe Q3 or the second low-end switch pipe Q2, the second high-end switch pipe Q4 is straight-through and burn out switching tube.
Embodiment 3
See Fig. 1-5, on the basis of embodiment 1, a kind of method of work of permanent magnetism coil driver comprises:
1. close the in-phase end that accesses to first comparator 101, second comparator 201 with the permanent magnetism dividing control signal respectively by the permanent magnetism of processor output; Wherein to close high level 5V, low level with the permanent magnetism dividing control signal be 0V to permanent magnetism; The supply voltage of first comparator 101 and second comparator 201 is 5-20V, generally gets 13V; The power supply of comparative level circuit is also got 13V.
2. be high level if described permanent magnetism closes control signal; And the permanent magnetism dividing control signal is a low level; The in-phase end voltage of then said first comparator 101 is higher than end of oppisite phase voltage; These first comparator, 101 output high level make this first low-end switch pipe Q1 conducting to control first low-side driver circuitry 102 of the first low-end switch pipe Q1;
The high level of said first comparator 101 outputs also accesses to second control circuit 103; Second high-end drive circuit 104 of these second control circuit 103 controls second high-end switch pipe Q4 makes the second high-end switch pipe Q4 conducting, and improves the output voltage of the second comparative level circuit 105;
The permanent magnetism coil L1 that is located between the said first low-end switch pipe Q1 and the second high-end switch pipe Q4 gets;
The output voltage of the second comparative level circuit 105 inputs to the end of oppisite phase of second comparator 201; The in-phase end voltage of said second comparator 201 is lower than the input voltage of its end of oppisite phase, then said second comparator, 201 output low levels; The low level of these second comparator, 201 outputs is controlled second low-side driver circuitry 202 ends the second low-end switch pipe Q2;
The low level of said second comparator 201 outputs also accesses to first control circuit 203, and the said first control circuit 203 controls first high-end switch tube drive circuit 204 ends the first high-end switch pipe Q3;
3. if described permanent magnetism dividing control signal is a high level; And it is low level that permanent magnetism closes control signal; The in-phase end voltage of then said second comparator 201 is higher than end of oppisite phase voltage; These second comparator, 201 output high level make this second low-end switch pipe Q2 conducting to control second low-side driver circuitry 202 of the second low-end switch pipe Q2;
The high level of said second comparator 201 outputs also accesses to first control circuit 203; First high-end drive circuit 204 of these first control circuit 203 controls first high-end switch pipe Q3 makes the first high-end switch pipe Q3 conducting, and improves the output voltage of the first comparative level circuit 205;
The permanent magnetism coil L1 that is located between the said second low-end switch pipe Q2 and the first high-end switch pipe Q3 gets;
The output voltage of the first comparative level circuit 205 inputs to the end of oppisite phase of first comparator 101; The in-phase end voltage of said first comparator 101 is lower than the input voltage of its end of oppisite phase, then said first comparator, 101 output low levels; The low level of these first comparator, 101 outputs is controlled first low-side driver circuitry 102 ends the first low-end switch pipe Q1;
The low level of said first comparator 101 outputs also accesses to second control circuit 103, and the said second control circuit 103 controls second high-end switch tube drive circuit 104 ends the second high-end switch pipe Q4;
Further; Said first control circuit 203 comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA2; The negative electrode of the said first photoelectrical coupler DA1 is connected with the anode of the second photoelectrical coupler DA2, and the anode that forms the first node J1, the first photoelectrical coupler DA1 on this connecting line is connected with the negative electrode of the second photoelectrical coupler DA2 respectively and this connecting line on the formation second node J2; The said first node J1 is as the output of this first control circuit 203, and the said second node J2 is as the input of this first control circuit 203; The emitter of the said first photoelectrical coupler DA1 links to each other with the collector electrode of the said second photoelectrical coupler DA2, and the emitter of the said second photoelectrical coupler DA2 is as a suspension earth terminal, and the collector electrode of the said first photoelectrical coupler DA1 links to each other with driving power; The collector electrode of the said second photoelectrical coupler DA2 also links to each other with the input of said high-end switch tube drive circuit; The earth terminal of said high-end switch tube drive circuit links to each other with said suspension earth terminal;
Said first control circuit 203 also comprises: the 15 diode VD15, second capacitor C 2; One end of the negative electrode of said the 15 diode VD15 and second capacitor C 2 links to each other with said driving power; The other end of the anode of said the 15 diode VD15 and second capacitor C 2 links to each other with said suspension earth terminal;
The controlled step of said first control circuit 203 comprises:
When the input high level of the control input end of first control circuit 203; The said second photoelectrical coupler DA2 ends; The said first photoelectrical coupler DA1 conducting; The driving power of then being located at the said first photoelectrical coupler DA1 collector electrode accesses to the collector electrode of the said second photoelectrical coupler DA2, and inputs to the first high-end switch pipe Q3 through the 14 diode VD14, the 15 resistance R 15, i.e. this first high-end switch pipe conducting;
Also access to the input of the said first comparative level circuit 205 simultaneously when the high level of the control input end of importing said first control circuit 203; Improve the said first diode VD1 anode potential, and then improve the input voltage of the output voltage of the said first comparative level circuit 205 greater than the in-phase end of said first comparator 101;
When the input low level of the control input end of first control circuit 203; The said second photoelectrical coupler DA2 conducting; The said first photoelectrical coupler DA1 ends, and the collector and emitter of the said second photoelectrical coupler DA2 is to said suspension earth terminal short circuit, and promptly this first high-end switch pipe Q3 ends;
Said second control circuit 103 is identical with the structure and the operation principle of first control circuit 203.
See Fig. 1,2; Said permanent magnetism coil driver; Comprise: the H electric bridge that has the first low-end switch pipe Q1 and the second low-end switch pipe Q2 and the first high-end switch pipe Q3 and the second high-end switch pipe Q4 to constitute respectively; Wherein to be that first group of control coil L1 gets electric to pipe for the first low-end switch pipe Q1 and the second high-end switch pipe Q4; The second low-end switch pipe Q2 and the first high-end switch pipe Q3 are second group and control said coil L1 and get that electric each high-end switch pipe links to each other with corresponding high-end drive circuit to pipe that each low-end switch pipe links to each other with corresponding low-side driver circuitry; Also comprise: control respectively said first, second group to identical first, second of the structure group of pipe to management and control system circuit; Said first pair of management and control system circuit 1, second group all comprise management and control system circuit 2: comparator, control circuit, comparative level circuit; The in-phase end of said comparator links to each other with external control signal, and its end of oppisite phase links to each other with the output of said comparative level circuit, and the output of this comparator links to each other with the input of said control circuit, said low-side driver circuitry input respectively; The output of said control circuit links to each other with said comparative level circuit control input end; The output of said comparative level circuit links to each other with the end of oppisite phase of the comparator of another group; Said comparator is suitable for when the output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting; Said control circuit is suitable for when said comparator is exported high level; Control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and improve the input voltage of the output voltage of said comparative level circuit greater than the in-phase end of the comparator of said another group; Or during said comparator output low level, control a described high-end drive circuit a corresponding high-end switch pipe is ended; Said comparative level circuit is suitable for providing comparative voltage.
Wherein, See Fig. 4; Said control circuit comprises: the first photoelectrical coupler DA1, the second photoelectrical coupler DA1DA2, the negative electrode of the said first photoelectrical coupler DA1, anode respectively with the corresponding connection of anode, negative electrode of the second photoelectrical coupler DA2, and form the first node J1, the second node J2; The said first node J1 is as the output of said control circuit, and the said second node J2 is as the input of this control circuit; The emitter of the said first photoelectrical coupler DA1 links to each other with the collector electrode of the said second photoelectrical coupler DA2; The emitter of the said second photoelectrical coupler DA2 is as corresponding suspension earth terminal, and the collector electrode of the said first photoelectrical coupler DA1 links to each other with driving power; The collector electrode of the said second photoelectrical coupler DA2 also links to each other with the input of said high-end switch tube drive circuit; The earth terminal of said high-end switch tube drive circuit links to each other with said suspension earth terminal.
Said control circuit also comprises: the 15 diode VD15, second capacitor C 2; One end of the negative electrode of said the 15 diode VD15 and second capacitor C 2 links to each other with said driving power; The other end of the anode of said the 15 diode VD15 and second capacitor C 2 links to each other with said suspension earth terminal.
See Fig. 4, the high-end drive circuit of said high-end switch pipe comprises: the 14 diode VD14, the 15 resistance R the 15, the 16 resistance R 16, the three positive-negative-positive triode V3, the 13 voltage-stabiliser tube VD13; The anode of said the 14 diode VD14 links to each other with the base stage of the 3rd positive-negative-positive triode V3, an end of the 16 resistance R 16, constitutes the input of said high-end switch tube drive circuit; The collector electrode of the other end of said the 16 resistance R 16, the 3rd positive-negative-positive triode V3, the anode of the 13 voltage-stabiliser tube VD13 link to each other with said suspension earth terminal; The negative electrode of said the 14 diode VD14 links to each other with the emitter of the 3rd positive-negative-positive triode V3, an end of the 15 resistance R 15; The other end of said the 15 resistance R 15 links to each other with the negative electrode of the 13 voltage-stabiliser tube VD13; Output as said high-end drive circuit; And link to each other with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe links to each other with the earth terminal of said high-end switch tube drive circuit.
See Fig. 5, said comparative level circuit comprises: first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first diode VD1, the second diode VD2, the 6th capacitor C 6; One end of said first resistance R 1 links to each other with a power supply, and the other end links to each other the other end ground connection of said the 6th capacitor C 6 with said second resistance R 2, an end of the 3rd resistance R 3, an end of the 6th capacitor C 6 respectively; The other end of said second resistance R 2 links to each other with the anode of the said first diode VD1, an end of the 4th resistance R 4, the said first node J1 respectively; The other end of said the 3rd resistance R 3 links to each other with the anode of the said first diode VD1, the negative electrode of the second diode VD2, the end of oppisite phase of comparator respectively; The plus earth of the other end of said the 4th resistance R 4, the said second diode VD2.
Said low side tube drive circuit comprises: the 6th resistance R 6, the 7th resistance R 7, the three diode VD3, a NPN type triode V1, the 4th voltage-stabiliser tube VD4; One end of said the 6th resistance R 6 links to each other with the output of said comparator; The other end links to each other with the anode of said the 3rd diode VD3, the base stage of a NPN type triode V1; The emitter of a said NPN type triode V1 links to each other with an end of the negative electrode of the 3rd diode VD3, said the 7th resistance R 7, and the said other end of the 7th resistance R 7 of stating links to each other with the negative electrode of the 4th voltage-stabiliser tube VD4, the base stage of corresponding low-end switch pipe; The grounded collector of the anode of said the 4th voltage-stabiliser tube VD4, a NPN type triode V1.
The in-phase end of said comparator links to each other with an input resistance, ground capacity.
See that Fig. 3-7, particularly Fig. 6,7 show second control circuit and the second high-end drive circuit figure and second comparison circuit, the first comparative level circuit and the second low-side driver circuitry figure; Its structure and first control circuit, first high-end drive circuit, the second comparative level circuit and first low-side driver circuitry are identical.
See Fig. 1, said first pair of management and control system circuit 1, second group all comprise management and control system circuit 2: comparator, control circuit, comparative level circuit; At present with each group to management and control system circuit grouping, promptly said first pair of management and control system circuit 1 comprises: first comparator 101, second control circuit 103, the second comparative level circuit 105; Said second pair of management and control system circuit 2 comprises: second comparator 201, first control circuit 203, the first comparative level circuit 205.
The structure of respectively organizing said comparator, control circuit, comparative level circuit in this execution mode is identical, so circuit no longer repeats expression; Components and parts model and circuit resistance that this each circuit of execution mode is shown at present are following:
R1=R3=R4=R8=R9=R11=10KΩ
R2=R5=R6=R10=R12=R13=2.2kΩ
R7=R15=R18=R14=39Ω
R16=R17=47?kΩ
The power supply of comparative level circuit is got 13V, and the power supply of comparator is got 13V.
Comparator can adopt the operational amplifier that is in open loop situations; The operational amplifier that is in open loop situations has non-linear characteristics, and promptly in-phase end voltage ratio end of oppisite phase voltage is high, and the output high level (equals the maximum of amplifier operating voltage; Power positive end of the present invention meets 13V; So the output high level is 13V), in-phase end voltage ratio end of oppisite phase voltage is low, and output low level (equals the minimum value of amplifier operating voltage; Power supply one end ground connection of the present invention is so low level is output as 0V).
A kind of permanent magnetism coil driver of the present invention is applicable to by NPN, positive-negative-positive switching tube, the H bridge circuit that perhaps various metal-oxide-semiconductors constitute.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to execution mode of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (8)
1. the method for work of a permanent magnetism coil driver comprises:
1. the permanent magnetism by processor output closes the in-phase end that accesses to first, second comparator with the permanent magnetism dividing control signal respectively;
2. be high level if described permanent magnetism closes control signal; And the permanent magnetism dividing control signal is a low level; The in-phase end voltage of then said first comparator is higher than end of oppisite phase voltage; This first comparator output high level makes this first low-end switch pipe conducting to control first low-side driver circuitry of the first low-end switch pipe;
The high level of said first comparator output also accesses to second control circuit, and second high-end drive circuit that this second control circuit is controlled the second high-end switch pipe makes the second high-end switch pipe conducting, and improves the output voltage of the second comparative level circuit;
The permanent magnetism coil of being located between the said first low-end switch pipe and the second high-end switch pipe gets;
The output voltage of the second comparative level circuit inputs to the end of oppisite phase of second comparator; The in-phase end voltage of said second comparator is lower than the input voltage of its end of oppisite phase, the then said second comparator output low level; The low level of this second comparator output is controlled second low-side driver circuitry ends the second low-end switch pipe;
The low level of said second comparator output also accesses to first control circuit, and said first control circuit is controlled the first high-end switch tube drive circuit ends the first high-end switch pipe;
3. if described permanent magnetism dividing control signal is a high level; And it is low level that permanent magnetism closes control signal; The in-phase end voltage of then said second comparator is higher than end of oppisite phase voltage; This second comparator output high level makes this second low-end switch pipe conducting to control second low-side driver circuitry of the second low-end switch pipe;
The high level of said second comparator output also accesses to first control circuit, and first high-end drive circuit that this first control circuit is controlled the first high-end switch pipe makes the first high-end switch pipe conducting, and improves the output voltage of the first comparative level circuit;
The permanent magnetism coil of being located between the said second low-end switch pipe and the first high-end switch pipe gets;
The output voltage of the first comparative level circuit inputs to the end of oppisite phase of first comparator; The in-phase end voltage of said first comparator is lower than the input voltage of its end of oppisite phase, the then said first comparator output low level; The low level of this first comparator output is controlled first low-side driver circuitry ends the first low-end switch pipe;
The low level of said first comparator output also accesses to second control circuit, and said second control circuit is controlled the second high-end switch tube drive circuit ends the second high-end switch pipe.
2. according to the method for work of the permanent magnetism coil driver of claim 1; It is characterized in that; Said first control circuit comprises: first, second photoelectrical coupler; The negative electrode of said first photoelectrical coupler is connected with the anode of second photoelectrical coupler, and the anode that forms first node, first photoelectrical coupler on this connecting line is connected with the negative electrode of second photoelectrical coupler respectively and this connecting line on formation second node; Said first node is as the output of this first control circuit, and said second node is as the input of this first control circuit; The emitter of said first photoelectrical coupler links to each other with the collector electrode of said second photoelectrical coupler, and the emitter of said second photoelectrical coupler is as the left suspension earth terminal, and the collector electrode of said first photoelectrical coupler links to each other with driving power; The collector electrode of said second photoelectrical coupler also links to each other with the input of the said first high-end switch tube drive circuit; The earth terminal of the said first high-end switch tube drive circuit links to each other with said left suspension earth terminal;
The controlled step of said first control circuit comprises:
When the input high level of the control input end of first control circuit; Said second photoelectrical coupler ends; The said first photoelectrical coupler conducting; The driving power of then being located at the said first photoelectrical coupler collector electrode accesses to the collector electrode of said second photoelectrical coupler, and inputs to the first high-end switch pipe through the 14 diode, the 15 resistance, i.e. this first high-end switch pipe conducting;
Also access to the input of the said first comparative level circuit simultaneously when the high level of the control input end of importing said first control circuit; Improve the said first diode anode current potential, and then improve the input voltage of the output voltage of the said first comparative level circuit greater than the in-phase end of said first comparator;
When the input low level of the control input end of first control circuit; The said second photoelectrical coupler conducting; Said first photoelectrical coupler ends, and the collector and emitter of said second photoelectrical coupler is to said suspension earth terminal short circuit, and promptly this first high-end switch pipe ends;
Said second control circuit is identical with the structure and the operation principle of first control circuit.
3. according to the method for work of the permanent magnetism coil driver of claim 1; It is characterized in that; Said permanent magnetism coil driver comprises: the H electric bridge that has first, second low-end switch pipe and the first, the second high-end switch pipe to constitute respectively; Wherein to be that first group of control coil gets electric to pipe for the first low-end switch pipe and the second high-end switch pipe; The second low-end switch pipe and the first high-end switch pipe are second group to be controlled said coil and gets that electric each high-end switch pipe links to each other with corresponding high-end drive circuit to pipe, and each low-end switch pipe links to each other with corresponding low-side driver circuitry;
Control respectively said first, second group to identical first, second of the structure group of pipe to management and control system circuit; Said first, second group all comprises management and control system circuit: comparator, control circuit, comparative level circuit;
The in-phase end of said comparator links to each other with external control signal, and its end of oppisite phase links to each other with the output of said comparative level circuit, and the output of this comparator links to each other with the input of said control circuit, said low-side driver circuitry input respectively;
The output of said control circuit links to each other with said comparative level circuit control input end;
The output of said comparative level circuit links to each other with the end of oppisite phase of the comparator of another group;
Said comparator is suitable for when the output high level, controlling a described low-side driver circuitry and making a corresponding low-end switch pipe conducting;
Said control circuit is suitable for when said comparator is exported high level; Control a described high-end drive circuit and make a corresponding high-end switch pipe conducting, and improve the input voltage of the output voltage of said comparative level circuit greater than the in-phase end of the comparator of said another group; Or during said comparator output low level, control a described high-end drive circuit a corresponding high-end switch pipe is ended;
Said comparative level circuit is suitable for providing comparative voltage.
4. according to the method for work of the permanent magnetism coil driver of claim 3; It is characterized in that; Said control circuit comprises: first, second photoelectrical coupler; The negative electrode of said first photoelectrical coupler, anode respectively with the corresponding connection of anode, negative electrode of second photoelectrical coupler, and form first, second node; Said first node is as the output of said control circuit, and said second node is as the input of this control circuit; The emitter of said first photoelectrical coupler links to each other with the collector electrode of said second photoelectrical coupler, and the emitter of said second photoelectrical coupler is as corresponding suspension earth terminal, and the collector electrode of said first photoelectrical coupler links to each other with driving power; The collector electrode of said second photoelectrical coupler also links to each other with the input of said high-end switch tube drive circuit; The earth terminal of said high-end switch tube drive circuit links to each other with said suspension earth terminal.
5. according to the method for work of the permanent magnetism coil driver of claim 4; It is characterized in that; The high-end drive circuit of said high-end switch pipe comprises: the high-end drive circuit of said high-end switch pipe comprises: the 14 diode; The 15, the 16 resistance, the 3rd positive-negative-positive triode, the 13 voltage-stabiliser tube; The anode of said the 14 diode links to each other with the base stage of the 3rd positive-negative-positive triode, an end of the 16 resistance, constitutes the input of said high-end switch tube drive circuit; The anode of the collector electrode of the other end of said the 16 resistance, the 3rd positive-negative-positive triode, 13 voltage-stabiliser tubes links to each other with said suspension earth terminal; The negative electrode of said the 14 diode links to each other with the emitter of the 3rd positive-negative-positive triode, an end of the 15 resistance; The other end of said the 15 resistance links to each other with the negative electrode of the 13 voltage-stabiliser tube; Output as said high-end drive circuit; And link to each other with the base stage of a corresponding high-end switch pipe, the emitter of this high-end switch pipe links to each other with the earth terminal of said high-end switch tube drive circuit.
6. according to the method for work of the permanent magnetism coil driver of claim 5, it is characterized in that said comparative level circuit comprises: first, second, third, fourth resistance, first, second diode, the 6th electric capacity; One end of said first resistance links to each other with a power supply, and the other end links to each other with an end of said second, third resistance, an end of the 6th electric capacity respectively, the other end ground connection of said the 6th electric capacity; The other end of said second resistance links to each other with the anode of said first diode, an end of the 4th resistance, said first node respectively; The other end of said the 3rd resistance links to each other with the anode of said first diode, the negative electrode of second diode, the end of oppisite phase of said comparator respectively; The plus earth of the other end of said the 4th resistance, said second diode.
7. according to the method for work of the permanent magnetism coil driver of claim 6, it is characterized in that said low side tube drive circuit comprises: six, the 7th resistance, the 3rd diode, a NPN type triode, the 4th voltage-stabiliser tube; One end of said the 6th resistance links to each other with the output of said comparator; The other end links to each other with the anode of said the 3rd diode, the base stage of a NPN type triode; The emitter of a said NPN type triode links to each other with an end of the negative electrode of the 3rd diode, said the 7th resistance, and the said other end of the 7th resistance of stating links to each other with the negative electrode of the 4th voltage-stabiliser tube, the base stage of corresponding low-end switch pipe; The grounded collector of the anode of said the 4th voltage-stabiliser tube, a NPN type triode.
8. according to the method for work of the permanent magnetism coil driver of claim 7, it is characterized in that the in-phase end of said comparator links to each other with an input resistance, ground capacity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310414683.0A CN103440957B (en) | 2012-07-18 | 2012-07-18 | The method of work of permanent magnet coil drive circuit |
| CN 201210250424 CN102737810B (en) | 2012-07-18 | 2012-07-18 | Working method of permanent magnet coil driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210250424 CN102737810B (en) | 2012-07-18 | 2012-07-18 | Working method of permanent magnet coil driving circuit |
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| CN201310414683.0A Division CN103440957B (en) | 2012-07-18 | 2012-07-18 | The method of work of permanent magnet coil drive circuit |
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| CN102737810A true CN102737810A (en) | 2012-10-17 |
| CN102737810B CN102737810B (en) | 2013-10-16 |
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| CN 201210250424 Active CN102737810B (en) | 2012-07-18 | 2012-07-18 | Working method of permanent magnet coil driving circuit |
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Cited By (4)
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| CN103986448A (en) * | 2014-05-28 | 2014-08-13 | 苏州工业职业技术学院 | Drive inductor of refrigerator electromagnetic door |
| CN105356872A (en) * | 2015-11-27 | 2016-02-24 | 重庆川仪自动化股份有限公司 | Pulse output circuit and pulse output method for electromagnetic flowmeter |
| CN106059289A (en) * | 2016-07-01 | 2016-10-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Circuit topological structure capable of solving action dispersity problem of single-coil or dual-coil permanent magnetic mechanism due to idle time and control method thereof |
| CN109998896A (en) * | 2019-04-28 | 2019-07-12 | 郑州飞龙医疗设备有限公司 | The control circuit of spinal treatments rifle |
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| CN103986448A (en) * | 2014-05-28 | 2014-08-13 | 苏州工业职业技术学院 | Drive inductor of refrigerator electromagnetic door |
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| CN106059289A (en) * | 2016-07-01 | 2016-10-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Circuit topological structure capable of solving action dispersity problem of single-coil or dual-coil permanent magnetic mechanism due to idle time and control method thereof |
| CN106059289B (en) * | 2016-07-01 | 2019-07-23 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of circuit topological structure and control method for solving unicoil or Double coil permanent magnetic mechanism and causing to act dispersibility because of standby time |
| CN109998896A (en) * | 2019-04-28 | 2019-07-12 | 郑州飞龙医疗设备有限公司 | The control circuit of spinal treatments rifle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103440957A (en) | 2013-12-11 |
| CN103440957B (en) | 2015-10-07 |
| CN102737810B (en) | 2013-10-16 |
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