CN205911239U - Coil control circuit of contactor - Google Patents
Coil control circuit of contactor Download PDFInfo
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- CN205911239U CN205911239U CN201620704402.4U CN201620704402U CN205911239U CN 205911239 U CN205911239 U CN 205911239U CN 201620704402 U CN201620704402 U CN 201620704402U CN 205911239 U CN205911239 U CN 205911239U
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Abstract
The utility model provides a coil control circuit of contactor, includes ON -OFF control circuit, drive circuit, closes breaking of contact, diode, MOS pipe and a contactor coil fast. Close the breaking of contact fast at least including a MOS pipe or triode, negative pole and the input voltage of diode link to each other, the first port of positive pole and quick pass breaking of contact of diode link to each other, it links to each other to close the second port of breaking of contact and the drain electrode of MOS pipe fast, the source electrode ground connection of MOS pipe, contactor coil's one end links to each other with input voltage, the other end of contactor and the drain electrode of MOS pipe link to each other, the third port that closes the breaking of contact fast is continuous with drive circuit's output port, drive circuit's input port links to each other with ON -OFF control circuit's an output port, ON -OFF control circuit's the 2nd output port and the grid of MOS pipe link to each other. The utility model discloses when the be brought into contact ware can turn -off fast, coil control circuit's loss was littleer, used device still less, cost and volume are littleer.
Description
Technical field
The present invention relates to A.C. contactor field is and in particular to the coil control circuit of catalyst.
Background technology
The electromagnetic control system of traditional contactors is made up of coil and iron core, and the number of turn of coil is much hundreds of or even thousands of
The very big inductance of circle, a contactor coil actually sensibility reciprocal and internal resistance, the sensibility reciprocal of usual contactor coil is hundreds of milli
The prosperous ranks to several henries, internal resistance has tens ohm to arrive hundreds of ohm.The whole work process of contactor coil can be divided into three
Stage: adhesive stage, sticking stage and off-phases.In the adhesive stage, contactor coil passes through larger operating current, coil
Producing larger electromagnetic force makes probe of contactor close, and this process is typically within 200ms.After probe of contactor adhesive,
It has been put into the sticking stage, be about 1/10th of operating current in the holding current of this stage coil, excessive sticking is electric
Stream can make the loss of coil increase.And the stage that probe of contactor disconnects is referred to as off-phases, the electric current of coil is consumed and connects
Tentaculum contact just can disconnect.Contactor coil needs high current in adhesive, and only needs less electric current in sticking.Traditional
Catalyst no other control elements, can only be by the impedance of coil itself come current limliting.In order to take into account the high current needed for adhesive, line
The impedance of circle can not be designed to too big.So in catalyst holding course, electric current that coil flows through is much larger than and is actually needed
Electric current, the heat of the coil that unnecessary energy becomes, not only waste the energy, and the temperature of coil can be made to rise high reliability fall
Low.Big in order to solve the problems, such as traditional contactors power consumption, occur in that the power save circuit of a lot of catalysts.
Circuit as Fig. 1 is exactly a kind of common power save circuit, is connect so that it may adjust by the dutycycle adjusting mos pipe t1
The electric current of tentaculum coil 1.Make the dutycycle of t1 larger in the adhesive stage, make the duty of t1 smaller in the sticking stage it is possible to
Contactor coil is allowed to realize high current adhesive small current sticking, thus reaching the effect of energy-conservation.In the circuit, diode d1 carries
For the continuous current circuit of coil, loop pressure drop about 0.7v, in normal work, low-impedance continuous current circuit is conducive to reducing whole electricity
The loss on road.When in off-phases, need the quick electric current consuming coil, catalyst can be turned off rapidly.And at this time
Low-impedance continuous current circuit is just unfavorable for rapidly switching off of catalyst, and low-impedance continuous current circuit can make coil current can maintain
Longer time, catalyst can be delayed to turn off.In the traditional contactors product, the time that is normally off is 50ms.And add
The catalyst product of power save circuit, due to the presence of coil Low ESR continuous current circuit, the turn-off time can rise to 200ms.
In general application scenario, the somewhat increase turn-off time can't produce too much influence.But in some occasions, turn-off time
Increase can the more fatal problem of producing ratio.As the catalyst of controlled motor just reverse, the adhesive of forward and reverse contactor and release
Alternately overlap must can not occur in time.When catalyst shutoff time delay is larger, arise that a catalyst also
It is not fully disconnected, another may result in power supply short circuit and cause danger with regard to adhesive.
In order to realize rapidly switching off function it is necessary to when catalyst turns off, allow the impedance of coil continuous current circuit to increase.Generally
Way be in the impedance switching continuous current circuit with a switch.For convenience, hereafter for switching continuous current circuit impedance
Switching device is all referred to as rapidly switching off pipe.Band rapidly switches off the catalyst power save circuit of function at present, has certain problem.
As the patent of Publication No. cn1925085a, the circuit theory diagrams that it rapidly switches off are as shown in Figure 2.A kind of band rapidly switches off function
Catalyst power save circuit, in adhesive and sticking stage, rapidly switch off pipe and be operated in amplification region it is assumed that the voltage of grid is vgs,
Voltage v so between drain-sourcedsIt is equal to (vgth+(ids/k))*(r1+r2)/r2, wherein vgth is the cut-in voltage threshold of mos pipe
Value, the k coefficient proportional to the mutual conductance of mos pipe, ids is the electric current between drain-source；Rapidly switch off the stage, rapidly switch off pipe disconnected
Open, coil current is quickly consumed by r1 and z1, reach the effect rapidly switching off.The shortcoming of this circuit is in adhesive and sticking rank
Section, rapidly switches off pipe and is operated in amplification region, unlatching threshold value v of usual gridgthTypically in more than 3.5v, so between its drain-source
Voltage vdsBe also in more than 3.5v than larger, so rapidly switch off in contactor coil afterflow pipe will be lost more
Energy, increased the loss in adhesive stage and sticking stage for the power save circuit.
Also do not see there is technology under this main power topology at present, mos pipe can be allowed to guarantee adequate food as rapidly switching off and lead
Logical, a certainly multiplex insulating power supply is also possible, but cost is very high.As the patent of application number 201210004876.4,
The method adopting in this patent is to be powered to the grid rapidly switching off pipe with an extra insulating power supply.Although using the method,
Mos pipe tr2 can be fully on, vdsThe pressure drop very little at two ends, but circuit can become extremely complex.Insulating power supply needs to isolate transformation
The devices such as device, rectification circuit, mu balanced circuit, for whole catalyst power save circuit, the cost shared by insulating power supply and body
Long-pending ratio is larger, and the loss of itself simultaneously is also than larger.
Content of the invention
The present invention seeks to, a kind of coil control circuit of catalyst is proposed, same make catalyst can rapidly switch off
When, the loss of coil control circuit is less, and device used is less, and cost and volume are less.
In order to realize foregoing invention purpose, the present invention provides a kind of coil control circuit of catalyst, including on-off control
Circuit, drive circuit, rapidly switch off circuit, diode, a mos pipe and contactor coil.Rapidly switch off circuit at least
Including a mos pipe or audion.The circuit connecting relation of the present invention is: the negative electrode of described diode and input voltage phase
Even, the described anode of diode is connected with the first port rapidly switching off circuit, rapidly switches off the second port and the of circuit
The drain electrode of one mos pipe is connected, the source ground of a mos pipe, and one end of contactor coil is connected with input voltage, catalyst
The other end is connected with the drain electrode of a mos pipe, and the 3rd port rapidly switching off circuit is connected with the output port of drive circuit, drives
The input port on galvanic electricity road is connected with the first output port of ON-OFF control circuit, the second output port of ON-OFF control circuit with
The grid of the first mos pipe is connected.
Specifically, a kind of coil control circuit of catalyst is it is adaptable to the coil of control contactor, including afterflow two pole
Pipe d1 and mos pipe tr1, also includes rapidly switching off circuit, drive circuit and ON-OFF control circuit, rapidly switches off circuit, with afterflow
Diode d1 forms continuous current circuit, in adhesive and sticking stage, provides low-impedance path for continuous current circuit, in off-phases,
There is provided high impedance path for continuous current circuit；Drive circuit, provides driving voltage for rapidly switching off circuit；ON-OFF control circuit, control
The operation of mos pipe tr1 processed.
Preferably, described drive circuit, in adhesive and the sticking stage of coil, driving rapidly switches off circuit and works in saturation
Conducting state.
Preferably, the described circuit that rapidly switches off is mos pipe, in adhesive and the sticking stage of coil, meets vgs>(vgth+
ids/ k) saturation conduction parameter attribute.
Preferably, described rapidly switch off circuit, including mos pipe tr2；Described drive circuit, including electric capacity c1；Described switch
Control circuit, provides end including mos pipe tr3, mos pipe tr4 and electric current；Electric capacity c1 be connected in parallel on the grid of mos pipe tr2 and source electrode it
Between；Electric current provides body diode, the body diode of mos pipe tr2 and mos pipe tr1 that the electric current at end passes through mos pipe tr4 to be formed
Path to electric capacity c1 charge；When mos pipe tr2 turns on, electric capacity c1 persistently power by the grid to mos pipe tr2, to allow mos to manage
Tr2 saturation conduction.
Preferably, the electric capacity c1 of described drive circuit, in off-phases, by mos pipe tr4, mos pipe tr3, mos pipe tr1
Body diode and the loop that formed of mos pipe tr2 release energy.
Preferably, described rapidly switch off circuit, including audion q1；Described drive circuit includes resistance r1；Described switch
Control circuit, including mos pipe tr3, in adhesive stage and sticking stage, mos pipe tr3 turns on, and forms the path of resistance r1 and ground,
Set up the base current of audion q1 by resistance r1, to allow audion q1 saturation conduction.
Preferably, described ON-OFF control circuit, in off-phases, controls mos pipe tr3 to turn off, to allow audion q1 to work
In magnifying state or complete switch off state.
The coil control method of the coil control circuit of catalyst of the present invention is:
In adhesive stage and sticking stage, the second output port of ON-OFF control circuit persistently exports square-wave signal and controls the
One mos Gutron is broken；In off-phases, the second defeated port of ON-OFF control circuit does not export square-wave signal and controls a mos pipe to hold
Radix Dipsaci is opened.
Rapidly switching off circuit can be mos pipe or audion.Manage (representing with the 2nd mos pipe) when rapidly switching off to manage for mos
When, this control circuit is characterised by: in adhesive and sticking stage, turns off the moment in a mos pipe, drive circuit controls second
Mos pipe turns on, and the parameter attribute of the 2nd mos pipe is vgs>(vgth+ids/ k), wherein vgthIt is the turn on voltage threshold of mos pipe, k
It is the coefficient proportional to the mutual conductance of mos pipe, vgsFor the voltage of the 2nd mos tube grid, idsBetween the 2nd mos pipe drain-source
Electric current.Drive circuit can be vgsIt is arranged on more than 10v, under this driving voltage, mos pipe can be fully on, the 2nd mos pipe
Conducting internal resistance rdsonVery little, the power that the 2nd mos pipe consumes is ids 2*rdson, this loss is very little.In off-phases,
Drive circuit controls the grid voltage of the 2nd mos pipe, and the parameter attribute of grid voltage is vgs=(vgth+ids/ k) or vgs < vgth,
The 2nd mos pipe is allowed to be in amplification region or to complete switch off, the conducting internal resistance r of the 2nd mos pipedsonVery big, can consume rapidly and connect
The energy of tentaculum coil is so that catalyst can rapidly switch off.
When rapidly switching off pipe for Npn triode (representing with described Npn triode), the feature of this control circuit exists
In: in adhesive and sticking stage, turn off the moment in a mos pipe, drive circuit controls described Npn triode conducting, described npn
The parameter attribute of audion is ib>ice/ β, wherein ibIt is the base current of Npn triode, β is the amplification of audion, ice
It is the electric current between Npn triode colelctor electrode and emitter stage.Work as ib>iceNpn triode saturation conduction during/β, at this moment electrode with send out
The pressure drop of emitter-base bandgap grading is 0.3v.In off-phases, drive circuit controls the base current of described Npn triode, and parameter attribute is
ib=ice/ β or ib=0a, allows described Npn triode to be in amplification region or to complete switch off, at this moment between colelctor electrode and emitter stage
Pressure drop is very big, and the power that described Npn triode consumes is vce*iceThe energy of contactor coil can be consumed rapidly so that connecing
Tentaculum can rapidly switch off.
Have the beneficial effect that using the present invention is available, reach rapidly switch off effect while, hardly increase extra
Loss.The present invention most important technology point is to propose a kind of method driving floatingly, and the mos pipe on floating ground can be led with saturation
Logical, circuit is again simple.Compared with currently existing scheme, zero defect.
Brief description
Fig. 1 is the circuit theory diagrams without the catalyst power save circuit rapidly switching off function for the prior art；
Fig. 2 rapidly switches off the circuit theory diagrams of the catalyst power save circuit of function for prior art band；
Fig. 3-1 is prior art using audion as the circuit theory diagrams rapidly switching off pipe；
Fig. 3-2 is prior art using mos pipe as the circuit theory diagrams rapidly switching off pipe；
The schematic block circuit diagram of Fig. 4 present invention；
Fig. 5 is the circuit theory diagrams of first embodiment of the invention；
Fig. 6 is the circuit theory diagrams of second embodiment of the invention；
Fig. 7 is the circuit theory diagrams of third embodiment of the invention；
Fig. 8 is the circuit theory diagrams of fourth embodiment of the invention；
Fig. 9 is the circuit theory diagrams of fifth embodiment of the invention；
Figure 10 is the logic timing figure of fifth embodiment of the invention；
Figure 11 is the circuit theory diagrams of sixth embodiment of the invention；
Figure 12 is the circuit theory diagrams of seventh embodiment of the invention.
Specific embodiment
Feature and the shortcoming of prior art was first explained first before introducing the present embodiment principle.The electricity of prior art
Road characteristics of principle block diagram is as shown in Figure 2.In adhesive and sticking stage, when mos pipe tr1 turns off, rapidly switch off pipe tr2 needs
Open to one continuous current circuit of contactor coil, drive the energy rapidly switching off conducting to be provided by contactor coil.This class skill
Art is characterised by, in adhesive and sticking stage, has no progeny when mos pipe tr1 closes, and electric current one tunnel of coil is from the electric circuit stream of driving
Cross, after driving rapidly switches off pipe and opens, another road is from rapidly switching off pipe flow mistake.In adhesive and sticking stage, mos pipe tr1 closes
Have no progeny, flow through and rapidly switch off pipe and the electric current of drive circuit meets relationship below: il=idri+ids.In addition, quick pass
Disconnected pipe also has other characteristic relation formulas, and when rapidly switching off pipe using Npn triode or mos pipe, relational expression can be otherwise varied.
Prior art others relationship characteristic is further illustrated below, accompanying drawing 3-1 and accompanying drawing 3-2 is using npn tri- respectively
Pole pipe and the specific example of mos pipe prior art.In adhesive with holding course, mos pipe tr1 is led to certain frequency dutycycle
Disconnected.The principle that floating ground mos pipe drives is that when tr1 turns off, the electric current of inductance needs afterflow, due to the sensibility reciprocal of contactor coil
Ratio is larger, can be approximately a constant-current source.When tr1 turns off, coil current will look for the afterflow of other loops, and coil current can be first
Flow through the ground level of triode or the grid of mos pipe, drive audion or the conducting of mos pipe.In the example of accompanying drawing 3-1, when with npn
When audion is as rapidly switching off pipe, in adhesive with holding course, base current ibWith collector current iceThe feature meeting
Relation is: ice=ib* β, to being operated in amplification region eventually, the voltage ratio at audion ce two ends is larger for audion.The ce of audion q1
Both end voltage is von=vb+(il/ (1+ β)) * r2, wherein vb is that the bias voltage of ground level is generally 0.7v, and β is putting of audion
Big multiple.In accompanying drawing 3-2 with mos pipe as rapidly switching off pipe when, in adhesive and holding course, mos tube grid voltage vgs
With drain current idsThe relationship characteristic meeting is: vgs=(vgth+ids/ k), wherein vgth is the turn on voltage threshold one of mos pipe
As be 3.5v, k is the coefficient proportional to the mutual conductance of mos pipe.The pressure drop at the ds two ends of mos pipe tr2 is von=(vgth+(ids/
k))*(r1+r2)/r2.In existing technology, the energy rapidly switching off pipe is provided by the freewheel current of contactor coil all the time,
Above-mentioned formula is to set up all the time, rapidly switches off pipe and is in magnifying state in afterflow all the time, pressure drop is larger, in afterflow certainly
The loss of body is also larger.To those of ordinary skill in the art, require lower-cost in the case of it is impossible to allow quick
Turn off pipe saturation conduction, loss cannot be accomplished minimum in catalyst adhesive and sticking stage.
The beneficial effect of the present embodiment to be described below by a simply example.
In the circuit structure of accompanying drawing 3-1 and accompanying drawing 3-2, rapidly switch off pipe and be in magnifying state, conduction voltage drop ratio all the time
Larger.Have no progeny when tr1 closes, coil current carries out afterflow, continuous current circuit by rapidly switching off pipe with the continuous current circuit that d1 is formed
The energy consuming is il*von.
In the example of accompanying drawing 3-1, to be designed with rapidly switching off pipe loss optimum, the method multiple selection of audion is common
β=100, r2=0 ω, coil current il=1a, vb=0.7v, substituting into above-mentioned formula can obtain, and rapidly switch off the work(of pipe consumption
Rate is 0.7w.
In the example of accompanying drawing 3-2, take r1=0 ω, r2=10k ω, coil current il=1a, vgth=3.5v, then fast
The loss that speed turns off pipe is 3.5w.
If allow rapidly switching off pipe saturation conduction, the pressure drop of audion saturation conduction is generally 0.3v, mos pipe conducting resistance
Select 0.05 ω, same coil current il=1a is it is easy to just can learn that the loss of audion is 0.3w, the loss of mos pipe is
0.05w.
Be more than by rapidly switch off pipe loss optimum come value result, in actual applications, rapidly switch off pipe to allow
More reliably work, all without taking 0 ω, the loss of pipe of rapidly switching off at this moment being operated in magnifying state can be bigger for r1.According to
The standard of gb21518-2008 " A.C. contactor energy efficiency market and efficiency grade " requires, and 1 pole efficiency requires below 1va, very
Obviously, allowing and rapidly switch off pipe and be operated in magnifying state, being all relatively difficult to realize 1 pole efficiency, even and if allowing using audion
It is operated in saturation, is not ideal.Optimal scheme is as rapidly switching off pipe from mos pipe, and
Adhesive and sticking state, allow mos pipe saturation conduction.
The loss contrast of pipe is rapidly switched off in the case of table 1 is each
First embodiment
The schematic block circuit diagram of the coil control circuit of catalyst of the present invention is as shown in figure 4, the coil of catalyst of the present invention
The first embodiment of control circuit is as shown in Figure 5.A kind of coil control circuit of catalyst, including ON-OFF control circuit, driving
Circuit, rapidly switch off circuit, diode d1, mos pipe tr1 and contactor coil l1.Rapidly switch off circuit and include mos pipe tr2.Drive
Galvanic electricity road includes electric capacity c1, diode d2 and resistance r1.ON-OFF control circuit include diode d3, reverser u1, mos pipe tr3,
Mos pipe tr4, the first signal port ctrl1, secondary signal port ctrl2 and the 3rd signal port ctrl3.
Each device annexation of first embodiment is: the negative electrode of diode d1 is connected with input voltage vin, diode d1
Anode be connected with the source electrode of mos pipe tr2, the drain electrode of mos pipe tr2 is connected with the drain electrode of mos pipe tr1, the source electrode of mos pipe tr1
Ground connection, one end of contactor coil l1 is connected with input voltage vin, the other end and mos pipe tr1 drain electrode be connected, mos pipe
The grid of tr1 is connected with the first signal port ctrl1.Electric capacity c1 is parallel to the grid source two ends of mos pipe tr2, the moon of diode d2
Pole is connected with the grid of mos pipe tr2, and resistance r1 is connected between the anode of diode d2 and the drain electrode of mos pipe tr2.Mos manages
The drain electrode of tr4 is connected with the grid of mos pipe tr2, and the grid of mos pipe tr4 is connected with the 3rd signal port ctrl3, mos pipe tr4
Source electrode be connected with the drain electrode of mos pipe tr3, be also connected with the negative electrode of diode d3 simultaneously, the source ground of mos pipe tr3, second
Signal port ctrl2 is connected with the anode of diode d3 and the input of reverser u1 respectively, and the output of reverser u1 is managed with mos
The grid of tr3 is connected.
The control method of first embodiment is:
In adhesive stage and sticking stage, the first signal port ctrl1 persistently exports square-wave signal and controls mos pipe tr1 to hold
Continuous break-make；3rd signal port ctrl3 continues input low level signal and persistently turns off by mos pipe tr4.In off-phases, first
Signal port ctrl1 does not export square-wave signal and controls mos pipe tr1 to be continuously turned off；3rd signal port ctrl3 input high level letter
Number make mos pipe tr4 persistently open-minded.
Secondary signal port ctrl2 is characterised by: in catalyst adhesive and sticking stage, secondary signal port ctrl2
For high level, when mos pipe tr1 turns on, the electric current of secondary signal port ctrl2 is managed through the body diode of mos pipe tr4, mos
The body diode of tr2, this loop of mos pipe tr1 are to electric capacity c1 charging, the voltage of electric capacity c1 and secondary signal port ctrl2
Voltage approximately equal.Electric capacity c1 persistently power by the grid to mos pipe tr2, and mos pipe tr2 can be allowed to be operated in fully saturated leading
Logical, very little is lost.In catalyst off-phases, secondary signal port ctrl2 is low level, controls mos pipe tr3 conducting, electric capacity
The electricity of c1 bleeds off rapidly through the body diode of mos pipe tr4, mos pipe tr3, mos pipe tr1, this loop of mos pipe tr2.At this moment,
The driving energy of mos pipe tr2 is provided by the freewheel current of contactor coil, mos pipe tr2 grid voltage vgsWith drain current ids
The relationship characteristic meeting is: vgs=(vgth+ids/ k), mos pipe tr2 is operated in amplification region, and the pressure drop between drain-source is equal to vgs.Connect
The electricity of tentaculum coil l1 is quickly consumed by mos pipe tr2, reaches the effect rapidly switching off.In the present embodiment, secondary signal port
Ctrl2 can be that the electric current of electric capacity c1 provides end, and in other embodiments, it can also be individually to set that the electric current of electric capacity c1 provides end
The supply port put, to realize same or analogous function, that is, provides energy to electric capacity c1, allows the voltage of electric capacity c1 to be far above fast
Speed turn off pipe unlatching threshold value, allow rapidly switch off pipe can be with saturation conduction.
In Fig. 5, the part of dotted line frame all can be integrated in chip, and electric capacity c1, resistance r1 and diode d2 are small-powers
Surface-mounted device, cost is very low and volume also very little.In adhesive with holding course, mos pipe always works in fully on
State, loss almost can disregard.Extraordinary effect can be obtained using the method for the present invention.
Second embodiment
The circuit theory diagrams of the coil control circuit of the catalyst of the second embodiment of the present invention are as shown in Figure 6.Circuit and
Control method is all similar with first embodiment, and the present embodiment is with the difference of first embodiment, with voltage stabilizing two pole
Pipe z1 instead of the resistance r1 in first embodiment.In adhesive and the sticking state of catalyst, the work process of circuit is with first
Embodiment is the same；In off-phases, mos pipe tr2 is operated in amplification region, mos pipe tr2 grid voltage vgsWith drain current idsFull
The relationship characteristic of foot is: vgs=(vgth+ids/ k), the pressure drop at its drain-source two ends is vgs+vz, vzVoltage for Zener diode z1.
In a second embodiment, mos pipe tr2 is bigger in the pressure drop rapidly switching off stage drain-source, and catalyst turn-off speed is faster.
3rd embodiment
The circuit theory diagrams of the coil control circuit of the catalyst of the third embodiment of the present invention are as shown in Figure 7.Circuit and
Control method is similar with first embodiment, and the present embodiment is with the difference of first embodiment, removes in the present embodiment
Resistance r1 in first embodiment, in one power resistor r3 of mos pipe tr2 drain-source two ends parallel connection.Catalyst adhesive with
Sticking state, the work process of circuit is as first embodiment；In off-phases, mos pipe tr2 is completely switched off, catalyst
The electricity of coil is consumed rapidly by power resistor r3, and the resistance of resistance r3 is bigger, and the speed that catalyst turns off is faster.
Fourth embodiment
The circuit theory diagrams of the coil control circuit of the catalyst of the fourth embodiment of the present invention are as shown in Figure 8.One kind connects
The coil control circuit of tentaculum, including ON-OFF control circuit, drive circuit, rapidly switch off circuit, diode d1, mos pipe tr1 and
Contactor coil l1.Rapidly switch off circuit and include mos pipe tr2.Drive circuit includes electric capacity c1, resistance r4, diode d2 and steady
Pressure diode z1.ON-OFF control circuit includes diode d3, the first signal port ctrl1 and secondary signal port ctrl2.
Each device annexation of fourth embodiment is: the negative electrode of diode d1 is connected with input voltage vin, diode d1
Anode be connected with the source electrode of mos pipe tr2, the drain electrode of mos pipe tr2 is connected with the drain electrode of mos pipe tr1, the source electrode of mos pipe tr1
Ground connection, one end of contactor coil l1 is connected with input voltage vin, the other end and mos pipe tr1 drain electrode be connected, mos pipe
The grid of tr1 is connected with the first signal port ctrl1.Electric capacity c1 and resistance r4 is parallel to the grid source two ends of mos pipe tr2, two poles
It is parallel to the grid leak two ends of mos pipe tr2 after pipe d2 and Zener diode z1 series connection.The negative electrode of diode d3 and the moon of diode d2
Extremely connected, the anode of diode d3 is connected with secondary signal port ctrl2.
The control method of fourth embodiment is:
In adhesive stage and sticking stage, the first signal port ctrl1 persistently exports square-wave signal and controls mos pipe tr1 to hold
Continuous break-make；In off-phases, the first signal port ctrl1 does not export square-wave signal and controls mos pipe tr1 to be continuously turned off.
Secondary signal port ctrl2 is characterised by: in catalyst adhesive and sticking stage, secondary signal port ctrl2
For high level, when mos pipe tr1 turns on, the electric current of secondary signal port ctrl2 is through diode d3, electric capacity c1, mos pipe tr2
Body diode, this loop of mos pipe tr1 to electric capacity c1 charge；Electric capacity c1 persistently power by the grid to mos pipe tr2, allows
Mos pipe tr2 saturation conduction, is lost very little.In catalyst off-phases, secondary signal port ctrl2 is low level, electric capacity c1's
Electricity is consumed by resistance r4, and mos pipe enters amplification region, and the pressure drop at mos pipe tr2 drain-source two ends is vgs+vz, contactor coil is with one
Individual higher voltage degaussing, the electricity of contactor coil l1, by the quick consumption of mos pipe, reaches the effect rapidly switching off.Secondary signal
Port ctrl2 can be that the electric current of electric capacity c1 provides end, and it can also be the feeder ear being separately provided that the electric current of electric capacity c1 provides end
Mouthful.
5th embodiment
Fig. 9 is the circuit theory diagrams of the coil control circuit of catalyst of the fifth embodiment of the present invention, a kind of catalyst
Coil control circuit, including ON-OFF control circuit, drive circuit, rapidly switch off circuit, diode d1, mos pipe tr1 and contact
Device coil l1.Wherein rapidly switch off circuit and include mos pipe tr2, resistance r3.Drive circuit includes electric capacity c1, diode d2, voltage
Testing circuit and logic control circuit.
The each device annexation of embodiment five is: the negative electrode of diode d1 is connected with input voltage vin, the sun of diode d1
Pole is connected with the source electrode of mos pipe tr2, and the drain electrode of mos pipe tr2 is connected with the drain electrode of mos pipe tr1, and resistance r3 is parallel to the leakage of mos pipe
Source two ends, the source ground of mos pipe tr1, one end of contactor coil l1 is connected with input voltage vin, and the other end is managed with mos
Tr1 drain electrode be connected.The anode of diode d2 is connected with the drain electrode of mos pipe tr1, one end of the negative electrode of diode and electric capacity c1
It is connected, the other end of electric capacity c1 is connected with the source electrode of mos pipe tr2, the negative electrode of the input of voltage detecting circuit and diode d2
Be connected, the output port of voltage detecting circuit is connected with the first input port of logic control circuit, logic control circuit defeated
Exit port is connected with the grid of mos pipe tr2.First output port of ON-OFF control circuit is connected with the grid of mos pipe tr1, opens
The second output port closing control circuit is connected with the second input port of logic control circuit.
The control method of embodiment five is:
In adhesive stage and sticking stage, the first output port of ON-OFF control circuit persistently exports square-wave signal control
Mos pipe tr1 continues break-make；In off-phases, the first output port of ON-OFF control circuit does not export square-wave signal and controls mos pipe
Tr1 is continuously turned off.
The controlling feature of voltage detecting circuit is: voltage detecting circuit detects the voltage at electric capacity c1 two ends, when electric capacity two
When the voltage at end is higher than threshold value vth1, voltage detecting circuit exports high level；When electric capacity both end voltage is less than threshold value vth1, defeated
Go out low level.
The controlling feature of logic control circuit is: in adhesive stage and sticking stage, when voltage detecting circuit output is low
During level, logic control circuit controls mos pipe tr2 fully on；When voltage detecting circuit output high level, logic control electricity
Road controls mos pipe tr2 to be fully disconnected, and allows the freewheel current of contactor coil l1 to charge to electric capacity c1.The logical sequence of circuit is such as
Shown in Figure 10.
In contactor coil afterflow, if mos pipe tr2 is not turned on, coil current will charge to electric capacity c1, electric capacity
Voltage is vc=il*t/c1.Voltage on electric capacity c1 can be far above by voltage detecting circuit control, the voltage on electric capacity c1
The turn on voltage threshold of mos tube grid, then driving voltage dr2 can be lost very little so that mos pipe tr2 is fully on.Electricity
Holding c1 and diode d2 is all low power surface-mounted device, and voltage detecting circuit, logic control circuit and ON-OFF control circuit
Can integrated in a chip, the cost very low volume very little of whole circuit.
Sixth embodiment
The circuit theory diagrams of the coil control circuit of the catalyst of the sixth embodiment of the present invention are as shown in figure 11.One kind connects
The coil control circuit of tentaculum, including ON-OFF control circuit, drive circuit, rapidly switch off circuit, diode d1, mos pipe tr1 and
Contactor coil l1.ON-OFF control circuit includes mos pipe tr3, the first signal port ctrl1 and secondary signal port ctrl2.Drive
Galvanic electricity road includes resistance r1 and resistance r4.Rapidly switch off circuit and include pnp audion q1.
Each device annexation of sixth embodiment is: the negative electrode of diode d1 is connected with input voltage vin, diode d1
Anode be connected with the colelctor electrode of pnp pipe q1, the emitter stage of pnp pipe q1 is connected with the drain electrode of mos pipe tr1, the source of mos pipe tr1
Pole is grounded, and one end of contactor coil l1 is connected with input voltage vin, the other end and mos pipe tr1 drain electrode be connected, mos pipe
The grid of tr1 is connected with the first signal port ctrl1.Resistance r4 is connected between ground level and the colelctor electrode of pnp audion q1, electricity
Resistance r1 is connected between the ground level of pnp audion q1 and the drain electrode of mos pipe tr3, the source ground of mos pipe tr3, mos pipe tr3's
Grid is connected with secondary signal ctrl2.
The control method of sixth embodiment is:
In adhesive stage and sticking stage, the first signal port ctrl1 persistently exports square-wave signal and controls mos pipe tr1 to hold
Continuous break-make；In off-phases, the first signal port ctrl1 does not export square-wave signal and controls mos pipe tr1 to be continuously turned off.
Secondary signal port ctrl2 is characterised by: in adhesive and sticking stage, secondary signal port ctrl2 controls mos
Pipe tr3 turns on, and when mos pipe tr1 turns off, the electric current of contactor coil can flow to through the ground level of pnp audion, resistance r1
Ground, allows pnp triode ON.Preferably, the value of resistance r1 meets r1≤ vin*(1+β)/il1When, wherein, vinIt is input electricity
Pressure value, β is pnp audion amplification, il1It is contactor coil current value, pnp audion q1 is operated in saturation region, and loss is very
Little.In off-phases, secondary signal port ctrl2 controls mos pipe tr2 to turn off, and pnp audion q1 can be operated in amplification region.
In Figure 11, the part of dotted line frame can be realized in the form of integrated circuit, and resistance r1, r4 are low power patches
Piece device, cost is very low and volume also very little.
7th embodiment
The circuit theory diagrams of the coil control circuit of catalyst of the 7th embodiment are as shown in figure 12.A kind of line of catalyst
Circle control circuit, circuit is all similar with the 7th embodiment with control method, and the difference of the present embodiment and the 7th embodiment exists
In resistance r3 is connected in parallel on the colelctor electrode of pnp audion and emitter stage two ends.In off-phases, pnp audion q1 can be completely disconnected
Open, the electric current of contactor coil is discharged rapidly by r3, and other operation principles are just the same with the 5th embodiment.
In Figure 12, the part of dotted line frame can be realized in the form of integrated circuit, and resistance r1, r4 are low power patches
Piece device, cost is very low and volume also very little.
The above is only the preferred embodiment of the present invention it is noted that above-mentioned preferred implementation be not construed as right
The restriction of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch also to should be regarded as protection scope of the present invention.
Claims (21)
1. a kind of coil control circuit of catalyst, it is adaptable to the coil of control contactor, is managed including fly-wheel diode d1 and mos
Tr1 it is characterised in that: also include rapidly switching off circuit, drive circuit and ON-OFF control circuit,
Rapidly switch off circuit, form continuous current circuit with fly-wheel diode d1, in adhesive and sticking stage, provide for continuous current circuit low
The path of impedance, in off-phases, provides high impedance path for continuous current circuit；
Drive circuit, provides driving voltage for rapidly switching off circuit；
ON-OFF control circuit, controls the operation of mos pipe tr1.
2. catalyst according to claim 1 coil control circuit it is characterised in that: described drive circuit, in coil
Adhesive and sticking stage, drive and rapidly switch off circuit and work in saturation conduction state.
3. catalyst according to claim 1 coil control circuit it is characterised in that: the described circuit that rapidly switches off is
Mos manages, and in adhesive and the sticking stage of coil, meets vgs>(vgth+ids/ k) saturation conduction parameter attribute.
4. catalyst according to claim 1 coil control circuit it is characterised in that: described rapidly switch off circuit, bag
Include mos pipe tr2；Described drive circuit, including electric capacity c1；Described ON-OFF control circuit, including mos pipe tr3, mos pipe tr4 and electricity
Stream provides end；Electric capacity c1 is connected in parallel between grid and the source electrode of mos pipe tr2；Electric current provides the electric current at end to pass through mos pipe tr4's
The path that body diode, the body diode of mos pipe tr2 and mos pipe tr1 are formed charges to electric capacity c1；In mos pipe tr2 conducting
When, electric capacity c1 persistently power by the grid to mos pipe tr2, to allow mos pipe tr2 saturation conduction.
5. catalyst according to claim 4 coil control circuit it is characterised in that: the electric capacity of described drive circuit
C1, in off-phases, the loop being formed by body diode and the mos pipe tr2 of mos pipe tr4, mos pipe tr3, mos pipe tr1
Release energy.
6. catalyst according to claim 1 coil control circuit it is characterised in that: the described circuit that rapidly switches off is three
Pole pipe, in adhesive and the sticking stage of coil, meets ib>iceThe saturation conduction parameter attribute of/β.
7. catalyst according to claim 1 coil control circuit it is characterised in that: described rapidly switch off circuit, bag
Include audion q1；Described drive circuit includes resistance r1；Described ON-OFF control circuit, including mos pipe tr3, the adhesive stage with
In the sticking stage, mos pipe tr3 turns on, and forms the path of resistance r1 and ground, is set up the base current of audion q1 by resistance r1, with
Allow audion q1 saturation conduction.
8. catalyst according to claim 7 coil control circuit it is characterised in that: described ON-OFF control circuit,
Off-phases, control mos pipe tr3 to turn off, to allow audion q1 be operated in magnifying state or to complete switch off state.
9. catalyst according to claim 1 and 2 coil control circuit it is characterised in that: described rapidly switch off circuit,
Including mos pipe tr2；The negative electrode of diode d1 is connected with input voltage vin, the source electrode of the anode of diode d1 and mos pipe tr2
It is connected, the drain electrode of mos pipe tr2 is connected with the drain electrode of mos pipe tr1, the source ground of mos pipe tr1.
10. catalyst according to claim 9 coil control circuit it is characterised in that: described drive circuit, including electricity
Hold c1, diode d2 and resistance r1；Electric capacity c1 is parallel to the grid source two ends of mos pipe tr2, the negative electrode of diode d2 and mos pipe tr2
Grid be connected, resistance r1 is connected between the anode of diode d2 and the drain electrode of mos pipe tr2.
The coil control circuit of 11. catalysts according to claim 9 it is characterised in that: described drive circuit, including electricity
Hold c1, diode d2 and Zener diode z1；Electric capacity c1 is parallel to the grid source two ends of mos pipe tr2, the negative electrode of Zener diode z1
Drain electrode with mos pipe tr2 is connected, and the anode of Zener diode z1 is connected with the anode of diode d2, the negative electrode of diode d2 with
The grid of mos pipe tr2 is connected.
The coil control circuit of 12. catalysts according to claim 9 it is characterised in that: described drive circuit, including electricity
Hold c1, electric capacity c1 is parallel to mos pipe tr2 grid source two ends；The described circuit that rapidly switches off also includes resistance r3, and resistance r3 is parallel to
Mos pipe tr2 drain-source two ends.
The coil control circuit of 13. catalysts according to any one of claim 10-12 it is characterised in that: described open
Close control circuit and include diode d3, reverser u1, mos pipe tr3, mos pipe tr4, the first signal port ctrl1, secondary signal
Port ctrl2 and the 3rd signal port ctrl4；The drain electrode of mos pipe tr4 is connected with the grid of mos pipe tr2, the grid of mos pipe tr4
Pole is connected with the 3rd signal port ctrl4, and the source electrode of mos pipe tr4 is connected with the drain electrode of mos pipe tr3, simultaneously also with diode d3
Negative electrode be connected, the source ground of mos pipe tr3, secondary signal port ctrl2 anode and the reverser u1 with diode d3 respectively
Input be connected, the output of reverser u1 is connected with the grid of mos pipe tr3.
The coil control circuit of 14. catalysts according to claim 9 it is characterised in that: described drive circuit, including electricity
Hold c1, diode d2, resistance r4 and Zener diode z1；Electric capacity c1 and resistance r4 is connected in parallel on the grid source two ends of mos pipe tr2, surely
The negative electrode of pressure diode z1 is connected with the drain electrode of mos pipe tr2, and the anode of Zener diode z1 is connected with the anode of diode d2,
The negative electrode of diode d2 is connected with the grid of mos pipe tr2.
The coil control circuit of the catalyst described in 15. claim 14 it is characterised in that: described ON-OFF control circuit, including
Diode d3, the first signal port ctrl1 and secondary signal port ctrl2；The negative electrode of diode d3 and the negative electrode of second pipe d2
It is connected, the anode of diode d3 is connected with secondary signal port ctrl2, the grid of the first signal port ctrl1 and mos pipe tr1
It is connected.
The coil control circuit of 16. catalysts according to claim 9 it is characterised in that: described drive circuit, including patrolling
Collect control circuit, voltage detecting circuit, diode d2 and electric capacity c1；The anode of diode d2 is connected with the drain electrode of mos pipe tr1,
The negative electrode of diode is connected with one end of electric capacity c1, and the other end of electric capacity c1 is connected with the source electrode of mos pipe tr2, voltage detecting electricity
The input on road is connected with the negative electrode of diode d2, and the output port of voltage detecting circuit inputs with the first of logic control circuit
Port is connected, and the output port of logic control circuit is connected with the grid of mos pipe tr2；The described circuit that rapidly switches off also includes
Resistance r3, resistance r3 are parallel to mos pipe tr2 drain-source two ends.
The coil control circuit of 17. catalysts according to claim 16 it is characterised in that: described voltage detecting circuit,
The voltage at detection electric capacity c1 two ends；When threshold value vth1 within electric capacity c1 both end voltage is higher than described voltage detecting circuit, patrol
Collect control circuit output high level signal, allow mos pipe tr2 to turn on；When electric capacity c1 both end voltage is less than described voltage detecting circuit
During threshold value vth2 of inside, logic control circuit input low level signal, allow mos pipe tr2 to turn off.
The coil control circuit of 18. catalysts according to claim 1 and 2 it is characterised in that: described rapidly switch off electricity
Road, including pnp audion q1.
The coil control circuit of 19. catalysts according to claim 18 is it is characterised in that described drive circuit, bag
Include resistance r1 and resistance r4；Resistance r4 is connected between ground level and the colelctor electrode of pnp audion q1, and resistance r1 is connected to pnp tri-
Between the drain electrode of the ground level of pole pipe q1 and mos pipe tr2.
The coil control circuit of 20. catalysts according to claim 18 is it is characterised in that described drive circuit includes
Resistance r1, resistance r1 are connected between the ground level of pnp audion q1 and the drain electrode of mos pipe tr2；Described rapidly switches off circuit also
Including resistance r3, two ends penetrated by the collection that resistance r3 is parallel to pnp audion q1.
The coil control circuit of 21. catalysts according to claim 19 or 20 is it is characterised in that described on-off control
Circuit, including mos pipe tr3, the first signal port ctrl1 and secondary signal port ctrl2；The source ground of mos pipe tr3, mos
The grid of pipe tr2 is connected with secondary signal ctrl2, and the first signal port ctrl1 is connected with the grid of mos pipe tr1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620704402.4U CN205911239U (en) | 2016-07-05 | 2016-07-05 | Coil control circuit of contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620704402.4U CN205911239U (en) | 2016-07-05 | 2016-07-05 | Coil control circuit of contactor |
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| Publication Number | Publication Date |
|---|---|
| CN205911239U true CN205911239U (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620704402.4U Active CN205911239U (en) | 2016-07-05 | 2016-07-05 | Coil control circuit of contactor |
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| CN (1) | CN205911239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024521A (en) * | 2016-07-05 | 2016-10-12 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
-
2016
- 2016-07-05 CN CN201620704402.4U patent/CN205911239U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024521A (en) * | 2016-07-05 | 2016-10-12 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN106024521B (en) * | 2016-07-05 | 2019-02-05 | 广州金升阳科技有限公司 | A kind of contactor coil control circuit |
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