Alternating current electromagnetic valve or the power save unit of A.C. contactor
Technical field
The present invention relates to Low Voltage Electrical Apparatus, particularly relate to one and have that electricity saving function " alternating current electromagnetic valve or exchange connect
The power save unit of tentaculum ".
Background technology
Alternating current electromagnetic valve (AC solenoid valve) is the type in electromagnetic valve, is household electrical appliance and industry control sets
Standby middle application low-voltage electrical apparatus widely.Be characterized in its input incoming transport voltage, with magnet exciting coil produce electricity
Magnetic Drive Valve opens or closes.
Alternating current electromagnetic valve is mainly made up of magnet exciting coil, spool, back-moving spring.Fig. 1 a, Fig. 1 b are alternating current electromagnetic valve control
The schematic diagram of fluid (gas or liquid) switching;Fig. 2 a, Fig. 2 b are that the AC hydraulic electromagnetic valve in hydraulic test controls " hydraulic oil "
The schematic diagram flowed to.
In conjunction with Fig. 1 a: (be generally called below when A1, A2 of magnet exciting coil terminate logical AC220V, AC110V or AC380V voltage
AC220V, AC110V or AC380V are AC voltage) time, its produce electromagnetic force promote spool overcome back-moving spring resistance and to
Lower movement is to setting position, and the piston being connected with spool moves down the most therewith, and described alternating current electromagnetic valve is opened, its " entrance " with
" export " connection.
In conjunction with Fig. 1 b: when in magnet exciting coil AC voltage turn off time, spool loss of excitation power, by back-moving spring effect and on
Move, piston also with on move, described alternating current electromagnetic valve RESET, its " entrance " and " outlet " shutoff.
During in conjunction with the logical AC voltage of A1, A2 termination of the magnet exciting coil of Fig. 2 a: hydraulic buttery valve, its electromagnetic force produced promotes
Spool overcomes the resistance of back-moving spring to move right to setting position, and the one group of piston being connected with spool moves to right the most therewith,
2 mouthfuls of described hydraulic buttery valve are just switched on 4 mouthfuls with 3 mouthfuls, 1 mouthful.
When turning off in conjunction with the AC voltage in the magnet exciting coil of Fig. 2 b: hydraulic buttery valve, spool loss of excitation power, by back-moving spring
Acting on and move to left, piston moves to left the most therewith, described hydraulic buttery valve RESET, and its 1 mouthful is just connect with 5 mouthfuls with 2 mouthfuls, 4 mouthfuls
Logical.
A.C. contactor (Alternating Current Contactor) is also a kind of application low tension widely
Device, its operation principle is to utilize electric magnet to drive movable contact (movable contact), makes normally-closed contact (normally
Closed contact) or normally opened contact (normally open contact) separate or close, reach to be switched off or on circuit
Purpose.It is applicable to start or control three phase induction motor and other electrical equipment.
Fig. 3 is the fundamental diagram of A.C. contactor, its mainly by dynamic iron core, static iron core, magnet exciting coil, back-moving spring,
Movable contact, normally-closed contact, normally opened contact are formed.When magnet exciting coil connects AC voltage, dynamic iron core is produced by magnet exciting coil
The effect of magnetic force and with static iron core Guan Bi (or claiming mobile to setting position), the movable contact linked with dynamic iron core is the most therewith with normally opened
The closing of contact, external circuit will pass through this normally opened contact and connects;When the AC voltage on magnet exciting coil disconnects, dynamic iron core loss of excitation power
And separated with static iron core by the effect of back-moving spring, normally opened contact resets and disconnects, and external circuit is cut off the most therewith.
Understand in sum: the operation principle of alternating current electromagnetic valve and A.C. contactor is essentially identical, their work process
" adhesive ", " sticking ", RESET three phases can be divided into.
For the ease of describing their work process, below by " spool " of alternating current electromagnetic valve, " the dynamic ferrum of A.C. contactor
Core " it is collectively referred to as " magnetic drives part ";" magnet exciting coil " of alternating current electromagnetic valve, A.C. contactor is collectively referred to as " magnet exciting coil L ".
1, adhesive: magnet exciting coil L and AC Voltage On state, magnetic drives the position that part is moved to by the driving of electromagnetic force set.
In this stage, for overcoming the elastic force of inertia and back-moving spring, AC voltage must provide for bigger power, and (hereinafter referred to as this power is
" adhesive power "), magnetic drives the position that part gets to set.
2, sticking: magnet exciting coil L continues and AC Voltage On state, and magnetic drives part and is continually maintained in the position of setting.In this stage,
AC voltage need only provide less power (hereinafter referred to as this power is " holding power "), and magnetic drives part also can be continually maintained in setting
Position.If in this stage, AC voltage provides excessive holding power, will result in waste of energy and causes magnet exciting coil L should not have
Heating up;
3, reset: magnet exciting coil L disconnects AC voltage, and magnetic drives the position that part RESET returns to initiate.
The alternating current electromagnetic valve of routine, A.C. contactor are owing in adhesive and sticking stage, all passing to identical in magnet exciting coil L
AC voltage, therefore there is following critical defect:
1, meaningless power consumption: front already described, in adhesive and sticking stage, conventional alternating current electromagnetic valve, the encouraging of A.C. contactor
Magnetic coil L all passes to " identical " AC voltage, makes holding power excessive, cause meaningless electric energy loss;
2, heating: disastrous effect produced by meaningless electric energy loss is " heat up heating ", time serious, even can burn excitation wire
Circle L;
3, there is annoying AC noise.
For regular alternating current electromagnetic valve, the present situation of regular alternating current catalyst, the target that the present invention is to be reached is: " answer electricity consumption
Sub-technology, rebuilds traditional industry ", design one has electricity saving function " the economize on electricity list of alternating current electromagnetic valve or A.C. contactor
Unit ", then make it combine with regular alternating current electromagnetic valve or regular alternating current catalyst, to obtain the beneficial effect of economize on electricity, noise elimination.
Summary of the invention
The present invention realizes above-mentioned mesh calibration method: a kind of alternating current electromagnetic valve or the power save unit of A.C. contactor, it is
One four port network, by first input port N1, the second input port N2, the first output port T1, the second output port T2,
Transient voltage suppressor TVS, AC-DC translation circuit 101, control pulse generating circuit 102, arteries and veins control special-shaped electric bridge circuit
103 are formed, it is characterised in that: described first input port N1 is connected with the P1 end of AC voltage, the second input port N2
It is connected with the P2 end of AC voltage;One end of described transient voltage suppressor TVS is connected with first input port N1,
The other end and the second input port N2 are connected;The A1 end of described the first output port T1 and magnet exciting coil L is connected, second
Output port T2 is connected with the A2 end of described magnet exciting coil L;1 end of described AC-DC translation circuit 101 and output port
Being connected, method of attachment has two kinds, the first: it is connected with the second output port T2, the second: with the first output port T1 phase
Connect;3 ends of control pulse generating circuit 102 are connected with 2 ends of described AC-DC translation circuit 101,4 ends are different with arteries and veins control
5 ends of shape bridge circuit 103 are connected;The AC1 end of arteries and veins control special-shaped electric bridge circuit 103 is connected with first input port N1, AC2
End is connected with the second input port N2, DC1 end and the first output port T1 is connected, DC2 end and the second output port T2 phase
Connect;Described AC-DC translation circuit 101, control pulse generating circuit 102 are equipped with one and are connected with the second input port N2
The port connect.
Described " alternating current electromagnetic valve or the power save unit of A.C. contactor " as stated above with regular alternating current electromagnetic valve or
Regular alternating current catalyst combines, it is possible to obtain economize on electricity, the beneficial effect of noise elimination.
Described AC-DC translation circuit 101 can use multiple circuit structure, and the present invention is preferred, and following circuit is tied
Structure: it is made up of the first electric capacity C1, the 4th electric capacity C4, the 4th diode D4, the 5th diode D5,1 end, 2 ends;Wherein, described
One end of the 4th electric capacity C4 be connected with 1 described end, the other end and the positive pole of the 4th diode D4 and the 5th diode D5
Negative pole be all connected;The negative pole of the 4th diode D4, the positive pole of the first electric capacity C1 are all connected with 2 ends;5th diode D5
Positive pole, the negative pole of the first electric capacity C1 is all connected with the second input port N2.
Described control pulse generating circuit 102 can use multiple circuit structure, following one that the present invention is preferred:
It is made up of the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the second electric capacity C2, audion V1,3 ends, 4 ends;Wherein, institute
One end of the second resistance R2, one end of the 3rd resistance R3 of stating all are connected with 3 ends;The other end of the 3rd resistance R3, the 4th electricity
Resistance one end of R4, one end all base stages with audion V1 of the second electric capacity C2 are connected;The other end of the second resistance R2, audion
The colelctor electrode of V1 is all connected with 4 ends;The other end of the second electric capacity C2, the other end of the 4th resistance R4, the transmitting of audion V1
The most all it is connected with the second input port N2.
Described arteries and veins control special-shaped electric bridge circuit 103 is by the first diode D1, the second diode D2, the 3rd diode D3, field
Effect pipe FET (Field Effect Transistor, FET), the 3rd electric capacity C3, AC1 end, AC2 end, DC1 end, DC2 end, 5 ends
Composition;Wherein, the negative pole of the first diode D1, the positive pole of the second diode D2 are all connected with AC1 end;Second diode D2's
Negative pole, one end of the 3rd electric capacity C3 are all connected with DC1 end;The positive pole of the 3rd diode D3, the first diode D1 positive pole equal
It is connected with DC2 end;The negative pole of the 3rd diode D3 is connected with the drain electrode of field effect transistor FET;The grid and 5 of effect pipe FET
End is connected;The other end of the 3rd electric capacity C3, the source electrode of effect pipe FET are all connected with AC2 end.
Described field effect transistor FET can be with other switching devices the most unidirectional thyratron transistor (Silicon
Controlled Rectifier, SCR), two-way thyratron transistor (Triode AC Switch, TRIAC), insulated gate bipolar
Transistor (Insulatend Gate Bipolar Transistor, IGBT), electron injection enhancement gate transistor
(Injection Enhanced Gate Tansistor, IEGT), SITH (Static Induction
Thyristor, SITH) or switch triode replacement.
The application present invention, can obtain following beneficial effect:
1, efficient electricity-saving:
In order to the efficient electric energy of the present invention is described, we have done following comparison and have tested:
(1) the regular alternating current electromagnetic valve (hereinafter referred to as " conventional valve ") of commercially available BY 03 type hydraulic pressure, power consumption is
61.2W;
Method by indication of the present invention, it may be assumed that above-mentioned " the regular alternating current electromagnetic valve of BY 03 type hydraulic pressure " is set up described
The new electromagnetic valve (hereinafter referred to as " A of the present invention ") that " alternating current electromagnetic valve or the power save unit of A.C. contactor " is formed afterwards, power consumption
Power is 1.2W;
Compared with " conventional valve ", the electric energy of " A of the present invention " is up to 98%.
(2), commercially available international famous brand LC1 D1810 type A.C. contactor (being called for short " international famous brand "): power consumption is
2.6W;
Method by indication of the present invention, it may be assumed that above-mentioned international famous brand LC1 D1810 type A.C. contactor adds described " exchange
Electromagnetic valve or the power save unit of A.C. contactor " the new A.C. contactor (hereinafter referred to as " B of the present invention ") that formed afterwards, power consumption merit
Rate is 0.2W;
Compared with " international famous brand ", the electric energy of " B of the present invention " is up to 92%.
2, quiet without making an uproar:
When " A of the present invention ", " B of the present invention " run, all quietnesses are without audible noise.
Commercially available " conventional valve ", " international famous brand " all has the AC noise of obvious audible when running.
3, low grade fever runs: the present invention has the function of efficient electricity-saving, has saved electric energy, certainty low grade fever during operation.
4, can be with " international famous brand " in enough rich technical specification challenge alternating current electromagnetic valve and A.C. contactor field.
Accompanying drawing explanation
Fig. 1 a is the schematic diagram of the regular alternating current solenoid valves state of gas or liquid;
Fig. 1 b is the schematic diagram of the regular alternating current electromagnetic valve off-position of gas or liquid;
Fig. 2 a is the schematic diagram of the regular alternating current solenoid valves state of hydraulic pressure;
Fig. 2 b is the schematic diagram of the regular alternating current electromagnetic valve off-position of hydraulic pressure;
Fig. 3 is the fundamental diagram of regular alternating current catalyst;
Fig. 4 is the functional-block diagram of the present invention;
Dotted line in figure represents that " 1 end " of AC-DC translation circuit 101 and the method for attachment of interlock circuit have two kinds, first
Kind: it is connected with the second output port T2;The second: be connected with the first output port T1.
Fig. 5 is the circuit theory diagrams of embodiments of the invention 1;
Fig. 6 is the circuit theory diagrams of embodiments of the invention 2;
Fig. 7 a is AC voltage oscillogram;
Fig. 7 b is the timing chart controlling pulse generating circuit 102 output.
Detailed description of the invention
Below in conjunction with the accompanying drawings, embodiments of the present invention are described.
Fig. 4 is the functional-block diagram of the present invention, in figure: L is encouraging in regular alternating current electromagnetic valve or regular alternating current catalyst
Magnetic coil, A1, A2 are its two connectivity ports.
In conjunction with Fig. 4: a kind of alternating current electromagnetic valve or the power save unit of A.C. contactor, it is four port networks, by
One input port N1, the second input port N2, the first output port T1, the second output port T2, transient voltage suppressor
TVS, AC-DC translation circuit 101, control pulse generating circuit 102, arteries and veins control special-shaped electric bridge circuit 103 are formed, and its feature exists
In: described first input port N1 is connected with the P1 end of AC voltage, and the P2 end of the second input port N2 and AC voltage is connected
Connect;One end of described transient voltage suppressor TVS is connected with first input port N1, the other end and the second input
Mouth N2 is connected;The A1 end of described the first output port T1 and magnet exciting coil L is connected, the second output port T2 with described
The A2 end of magnet exciting coil L is connected;1 end of described AC-DC translation circuit 101 is connected with output port, and method of attachment has
Two kinds, the first: it is connected with the second output port T2, the second: be connected with the first output port T1;Control pulse generation
3 ends of circuit 102 are connected with 2 ends of described AC-DC translation circuit 101,5 ends of 4 ends and arteries and veins control special-shaped electric bridge circuit 103
It is connected;The AC1 end of arteries and veins control special-shaped electric bridge circuit 103 is connected with first input port N1, AC2 end and the second input port N2
Be connected, DC1 end and the first output port T1 is connected, DC2 end and the second output port T2 are connected;Described AC-DC becomes
Change circuit 101, control pulse generating circuit 102 is equipped with a port being connected with the second input port N2.
Described alternating current electromagnetic valve or the power save unit of A.C. contactor as stated above with regular alternating current electromagnetic valve or often
Rule A.C. contactor combines, it is possible to obtain economize on electricity, the beneficial effect of noise elimination.
Fig. 5 is the circuit theory diagrams of embodiments of the invention 1.In conjunction with Fig. 5: in the present embodiment 1:
Input at AC voltage is provided with transient voltage suppressor TVS, is arranged such, and can obtain following useful
Effect: suppression outside " transient voltage " if the transient voltage produced when being struck by lightning or AC voltage because of inductive load such as
The transient voltage that self induction electromotive force when motor start-up, shutoff produces is scurried in the present invention, some of which device such as three
Pole pipe, field effect transistor, electric capacity etc. may breakdown damages.Input at AC voltage arranges transient voltage suppressor TVS
Afterwards, the magnitude of voltage of " transient voltage " scurried into when outside is higher than the breakdown voltage of described transient voltage suppressor TVS
Time, it is equivalent to short circuit, and the present invention is just protected.
In conjunction with Fig. 4, Fig. 5, in the present invention, claim by AC-DC translation circuit 101, control what pulse generating circuit 102 formed
System is " control system ", and the electric current i2 flowing through this " control system " is called " controlling electric current i2 ".
First electric capacity C1, the 4th electric capacity C4, the 4th diode D4, the 5th diode D5,1 end, 2 ends constitute AC-DC and become
Change circuit 101;Wherein, one end of the 4th described electric capacity C4 is connected with 1 described end, the other end and the 4th diode D4
The negative pole of positive pole and the 5th diode D5 is all connected;The negative pole of the 4th diode D4, the first electric capacity C1 positive pole all with 2 end phases
Connect;The positive pole of the 5th diode D5, the negative pole of the first electric capacity C1 are all connected with the second input port N2.
In the present embodiment 1, " 1 end " of AC-DC translation circuit 101 is connected with the second output port T2.
The D/C voltage of this AC-DC translation circuit 101 output is Vcc, 2 ends be its anode, the second input port N2 be that it is born
End.
This AC-DC translation circuit 101 has following two effect in the present invention concurrently: one, provides DC for " control system "
Voltage vcc;Its two, provide a part of adhesive power and holding power for magnet exciting coil L.
Second resistance R2, the 3rd resistance R3, the 4th resistance R4, the second electric capacity C2, audion V1,3 ends, 4 ends constitute control
Pulse generating circuit 102 processed;Wherein, described one end of the second resistance R2, one end of the 3rd resistance R3 are all connected with 3 ends;
The other end of the 3rd resistance R3, one end of the 4th resistance R4, one end all base stages with audion V1 of the second electric capacity C2 are connected;
The other end of the second resistance R2, the colelctor electrode of audion V1 are all connected with 4 ends;The other end of the second electric capacity C2, the 4th resistance
The other end of R4, the emitter stage of audion V1 are all connected with the second input port N2.
In conjunction with Fig. 5, in this control pulse generating circuit 102, when audion V1 (selects silicon three pole in the present embodiment
Pipe) base stage and emitter stage between voltage Vb less than 0.7V, i.e. Vb < 0.7V time, described audion V1 is cut-off state,
Voltage Vg on its colelctor electrode is " high level ", Vg ≈ Vcc;Otherwise, the voltage Vb between its base stage and emitter stage equal to or
More than 0.7V, i.e. during Vb >=0.7V, described audion V1 is conducting state, and the voltage Vg on its colelctor electrode is " low electricity
Flat ", Vg ≈ 0.Waveform Fig. 7 b of Vg represents.
The personnel of this specialty will be apparent that the audion V1 controlled in pulse generating circuit 102, can with 555 integrated time
Base circuit, integrated operational amplifier such as LM393 replaces;
First diode D1, the second diode D2, the 3rd diode D3, field effect transistor FET, the 3rd electric capacity C3, AC1 end,
AC2 end, DC1 end, DC2 end, 5 ends constitute arteries and veins control special-shaped electric bridge circuit 103;Wherein, the negative pole of the first diode D1, the two or two
The positive pole of pole pipe D2 is all connected with AC1 end;The negative pole of the second diode D2, one end of the 3rd electric capacity C3 are all connected with DC1 end
Connect;The positive pole of the 3rd diode D3, the positive pole of the first diode D1 are all connected with DC2 end;The negative pole of the 3rd diode D3 with
The drain electrode of field effect transistor FET is connected;Grid and 5 ends of effect pipe FET are connected;The other end of the 3rd electric capacity C3, effect pipe
The source electrode of FET is all connected with AC2 end.
This arteries and veins control special-shaped electric bridge circuit 103 is the different of the pulse voltage Vg control of controlled pulse generating circuit 102 output
Shape bridge circuit.Its AC1 end and DC1 end are brachium pontis 1, are made up of the second diode D2;AC1 end and DC2 end are brachium pontis 2, by the
One diode D1 composition;AC2 end and DC1 end are brachium pontis 3, are made up of the 3rd electric capacity C3;AC2 end and DC2 end are brachium pontis 4, by the
Three diode D3, field effect transistor FET form after being in series.
Described brachium pontis 4 is controlled by pulse voltage Vg: when Vg is high level, its near short circuit;When Vg is low level
Time, it approximates open circuit.
The personnel of this specialty will be apparent that field effect transistor FET in brachium pontis 4 can be with the most unidirectional crystalline substance of other switching devices
Body thyratron, two-way thyratron transistor, insulated gate bipolar transistor, electron injection enhancement gate transistor, electrostatic induction crystalline substance lock
Pipe or switch triode replace.
Below, in conjunction with accompanying drawing, illustrate the work process of the present embodiment 1:
One, adhesive:
In conjunction with Fig. 5, Fig. 7 a, Fig. 7 b:
During t=t1, AC Voltage On state, control electric current i2 along P1 N1 end AC1 end D2 DC1 end T1 end
A1 magnet exciting coil L A2 T2 end DC2 end 1 end C4 D4 2 end (mulitpath such as R3) N2 end P2's
Circulating in path, D/C voltage Vcc of AC-DC translation circuit 101 output is set up rapidly, and during t=t2, it reaches setting value (such as
DC15V)。
Second electric capacity C2 is charged by D/C voltage Vcc by the 3rd resistance R3, along with the process of charging, on this second electric capacity C2
Voltage i.e. base stage and the emitter stage of audion V1 between voltage Vb be gradually increasing.
In t2~t6 time domain, Vb < 0.7V, audion V1 are cut-off state, and the voltage Vg on its colelctor electrode is " high electricity
Flat ", field effect transistor FET in arteries and veins control special-shaped electric bridge circuit 103 is conducting state, and operating current i1 is along P1 N1 end AC1
End D2 DC1 end T1 end A1 magnet exciting coil L A2 T2 end DC2 end D3 field effect transistor FET AC2 end
The path circulation of N2 end P2, described magnet exciting coil L charging energy-storing, AC voltage is that the present embodiment carries by field effect transistor FET
For " adhesive power ".
To sum up analyze and understand: control electric current i2 and flow through magnet exciting coil L and consistent with operating current i1 direction.In other words:
In attracting process, the control electric current i2 in the present invention " is utilized " adhesive assisting operating current i1 to complete the present embodiment 1
Process.
Foregoing " magnetic drives part " is started " adhesive starting " by the effect of electromagnetic force produced by magnet exciting coil L.
In t3~t4 time domain, AC voltage be in P1 be bear, P2 is positive negative half period, the 3rd diode D3 cut-off.Owing to encouraging
Electric current i in magnetic coil L can not suddenly change, and it will be along A1 magnet exciting coil L A2 T2 end DC2 end D1 AC1 end
D2 DC1 end T1 end A1 path is continued circulation and is claimed " afterflow ", or claims magnet exciting coil L electric discharge to release energy;" magnetic drives part " is subject to
Continue to do the action of " adhesive starting " to the effect of electromagnetic force produced by " afterflow " electric current.
During t=t5, " magnetic drives part " arrives foregoing " setting position ", and the present embodiment completes attracting process and enters suction
Hold the stage.
Two, sticking:
In t5~t6 time domain, audion V1 is still cut-off state, and the voltage Vg on its colelctor electrode is still " high level ", arteries and veins
Field effect transistor FET in control special-shaped electric bridge circuit 103 is still conducting state.
Along with the process of charging, the voltage Vb between the voltage on the second electric capacity C2 i.e. base stage and the emitter stage of audion V1
Being gradually increasing, during to t=t6, Vb equals to or more than 0.7V, i.e. Vb >=0.7V, and described audion V1 becomes conducting state, its
Colelctor electrode on voltage Vg become " low level ", Vg ≈ 0, field effect transistor FET in arteries and veins control special-shaped electric bridge circuit 103 become cut
Only state, operating current shutoff i.e. i1=0.
After field effect transistor FET becomes cut-off, AC voltage is this by controlling the electric current i3 on electric current i2 and the 3rd electric capacity C3
Invention provides " holding power ".
Front already described, during t=t5, " magnetic drives part " arrives " setting position ", and the present embodiment completes " attracting process ";But
T5~t6 time domain, field effect transistor FET still turns on, and operating current i1 still circulates.In this t5~t6 time domain, operating current i1 serves
Consolidate the effect of adhesive " achievement ".
Front already described, t=t6 starts, and AC voltage is the present embodiment by controlling the electric current i3 on electric current i2 and the 3rd electric capacity C3
Thering is provided " holding power ", its process is:
In conjunction with Fig. 5, P1 be just, P2 be the positive half cycle of negative AC voltage: control electric current i2 along above-cited
P1 N1 end AC1 end D2 DC1 end T1 end A1 magnet exciting coil L A2 T2 end DC2 end 1 end C4
The path circulation of the D4 2 end N2 end P2 such as (R3 mulitpath), AC voltage provides " sticking merit by controlling electric current i2
Rate ".
P1 be bear, P2 is the negative half period of positive AC voltage, the electric current i3 on the 3rd electric capacity C3 is along P2 N2 end AC2
Hold the 3rd electric capacity C3 DC1 end T1 end A1 magnet exciting coil L A2 T2 end DC2 end D1 AC1 end N1
The path circulation of end P1, AC voltage provides " holding power " by this electric current i3.
Three, reset
During t=t7, AC voltage turns off, and the electric current i in magnet exciting coil L is along A1 magnet exciting coil L A2 T2 end DC2
End D1 AC1 end D2 DC1 end T1 end A1 path " afterflow " is also gradually decrease to zero, and the present embodiment 1 resets.
During t=t8, AC voltage recloses, and the present embodiment 1 is once again powered up, and reenters " adhesive ", " sticking ", RESET
Working cycle in.
Understand in sum: described arteries and veins control special-shaped electric bridge circuit 103 has two kinds of functions in the present invention concurrently, first, whole
Stream function: the electric current rectification flowed in magnet exciting coil L is become direct current;Second, afterflow function: for the electric current in magnet exciting coil L
" afterflow " path is provided.In brief: arteries and veins control special-shaped electric bridge circuit 103 has rectification, two kinds of functions of afterflow concurrently.
Fig. 6 is the circuit theory diagrams of embodiments of the invention 2, and the circuit structure of the present embodiment 2 is same as in Example 1, no
Something in common is: in the present embodiment 2, and " 1 end " of AC-DC translation circuit 101 is connected with the first output port T1.
The operation principle of the present embodiment 2 is same as in Example 1 with work process.
Above describing technical scheme, all are without departing from the replacement of the essence of technical scheme, all
Should be in the range of the claim of the present invention.