CN202564136U - Power-saving and silent alternating-current contactor - Google Patents
Power-saving and silent alternating-current contactor Download PDFInfo
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- CN202564136U CN202564136U CN2012200418589U CN201220041858U CN202564136U CN 202564136 U CN202564136 U CN 202564136U CN 2012200418589 U CN2012200418589 U CN 2012200418589U CN 201220041858 U CN201220041858 U CN 201220041858U CN 202564136 U CN202564136 U CN 202564136U
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Abstract
The utility model discloses a power-saving and silent alternating-current contactor, comprising a four-port additional cell and an alternating-current contactor, wherein the four-port additional cell comprises a transient voltage suppressor, an energy-storage capacitor, and a rectifier diode; the four-port additional cell is a four-port network; an input port is connected with an AC voltage; and an output port is connected with a magnet exciting coil in the alternating-current contactor. The power-saving and silent alternating-current contactor has four functions of being power saving, squelch, strong actuation and stable caging by using only three elements; and the four-port additional cell can be used for modifying the traditional alternating-current contactor, and also can be integrated into the alternating contactor which is being manufactured, thus manufacturing a novel power-saving and silent alternating-current contactor.
Description
Technical field
The utility model relates to the low-voltage electrical apparatus field, relates in particular to a kind of " A.C. contactor of economize on electricity noise elimination " with saves energy, static noise function.
Background technology
A.C. contactor is to use low-voltage electrical apparatus very widely in a kind of electric equipment.Its operation principle is to utilize electromagnet to drive moving contact (make contact) with fixed contact (break contact) closure or separate, and reaches the purpose that switches on or off circuit.It is applicable to starting or control three phase induction motor and other power consumption equipment.
Fig. 1 is the fundamental diagram of traditional A.C. contactor.This traditional A.C. contactor mainly is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact.When magnet exciting coil is connected AC220V, AC110V or AC380V power supply (following common name AC220V, AC110V or AC380V power supply are AC power supplies); Moving iron core receives the effect of the magnetic force that magnet exciting coil produces and closed with static iron core; Also closed thereupon with the make contact of moving iron core interlock, external circuit is just connected through this make contact; When the AC power supplies on the magnet exciting coil broke off, moving iron core loss of excitation also received the effect of back-moving spring and separates with static iron core, the make contact disconnection that resets, and external circuit just is cut off thereupon.
As stated, the course of work of this traditional A.C. contactor can be divided into " adhesive ", " sticking ", " disconnection " three phases:
1, adhesive: magnet exciting coil and AC power supplies are connected, dynamic and static iron core adhesive;
2, sticking: magnet exciting coil continues to connect with AC power supplies, and dynamic and static iron core keeps the state of adhesive;
3, break off: magnet exciting coil breaks off AC power supplies, and dynamic and static iron core separates, make contact resets disconnection.
Traditional A.C. contactor is owing to all pass to alternating current work in adhesive and the sticking stage magnet exciting coil, the critical defect below therefore existing:
1, heating: in adhesive and sticking stage; Owing to pass to alternating voltage (being AC power supplies) in the magnet exciting coil, therefore, will produce stagnant magnetic loss, eddy current loss in the dynamic and static iron core inevitably and generate heat; Magnet exciting coil is brought disaster in the heating of dynamic and static iron core, can cause magnet exciting coil to burn when serious.In addition, also be provided with " short-circuited conducting sleeve " in small-sized traditional A.C. contactor, the existence of this short-circuited conducting sleeve will aggravate the temperature rise of contactor, make magnet exciting coil more be prone to burn.
2, power consumption: the energy of traditional A.C. contactor heating is imported electric energy in the magnet exciting coil exactly, and another shortcoming that the heating that this kind is harmful brings is exactly meaningless power consumption.Reduce this power consumption, just can obtain the effect of " economize on electricity ".
3, noise: be input to the AC power supplies in the magnet exciting coil; During " zero passage " at every turn (AC power supplies by positive half cycle to negative half period or negative half period " zero crossing ") to positive half cycle transition; Electromagnetic attraction drastic change, can make the silicon steel sheet generation frequency in the dynamic and static iron core is the mechanical vibration noise of 100Hz (50Hz alternating current) or 120Hz (60Hz alternating current).
4, power factor (PF) (Power factor) is low.
To the critical defect that traditional A.C. contactor exists, the technical staff in electronics, the electrical apparatus industry studies, has designed multiple " electricity-saving circuit ", " electricity-saving appliance ", " energy saving ac contactor " that is used to improve traditional A.C. contactor performance.One Chinese patent application number is that 97216246.1 " energy-efficient A.C. contactor ", application number are that 94202133.9 " energy saving ac contactor device ", application number are that 201010144412.4 " a kind of energy saving ac contactor " discloses patent applicant's achievement in research separately.Above-mentioned prior art for improving the performance of conventional AC contactor, has been made useful exploration and has been obtained certain achievement really, but the defective below also existing, that is:
1, complex structure is difficult to carry out; Adopt monolithic processor controlled " A.C. contactor electricity-saving appliance " then to be subject to the electromagnetic interference of electrical equipment such as A.C. contactor itself or motor and cause internal processes execution error, generation " flyer " to miss and control;
2, used electronic device is too many, and electronic circuit is too complicated;
3, the product price of enforcement production is too high, and for example the price of the QXJB type A.C. contactor electricity-saving appliance of Zhuhai City, Guangdong Province Co., Ltd production is up to 1500 yuan/platform! Just more than 20 yuan of the price of small-sized A.C. contactor, the price of medium-sized A.C. contactor also has only hundreds of unit, and so expensive " QXJB type A.C. contactor electricity-saving appliance " will make the user very few.
4, because electronic circuit is complicated, and used electronic device is many, therefore, the economize on electricity of A.C. contactor control partly is difficult to become one with A.C. contactor, and described economize on electricity control partly must be established a box in addition, causes user installation inconvenience, wiring trouble.
5, because electronic circuit is complicated, and used electronic device is many, therefore, the power consumption (AC-DC transition loss, IC power consumption, actuator power consumption etc.) of the economize on electricity of A.C. contactor control part self will increase.That have even greatly to the stage of comparing mutually with the holding power of small-sized contactor.
Have above defective just because of prior art, so the situation below having occurred: " China's electricity-saving type A.C. contactor has had certain market at present, but universal not enough, and traditional A.C. contactor is occupied an leading position on the user uses at present.Main cause is that the power-saving contactor price is more expensive, and the user can't accept on disposable input, awaits country and in the popularization of energy-saving contactor, strengthens the policy dynamics, promotes the extensive use of energy-saving contactor ".
The status of the prior art, the utility model to be Ta objectives are:
1, simple as far as possible, used device of electronic circuit of design A.C. contactor economize on electricity few, that price is tried one's best honest and clean special-purpose " extra cell " of trying one's best;
2, should " extra cell " can be used for transforming the conventional AC contactor of online use, and make these A.C. contactors become " A.C. contactor of economize on electricity noise elimination ";
3, should " extra cell " also can be integrated in the conventional AC contactor that to produce, the manufacturer of A.C. contactor is produced and " extra cell " incorporate novel " A.C. contactor of economize on electricity noise elimination ".
Thereby there is the demand that overcomes above-mentioned defective and restriction in this area.
The utility model content
In order to reach above-mentioned target; The technical scheme of the utility model design is: a kind of A.C. contactor of the noise elimination that economizes on electricity; Comprise four port extra cells and A.C. contactor two partly; Said A.C. contactor is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact, it is characterized in that:
Described four port extra cells have S1, S2, P1, four ports of P2, and port S1, S2 are its input port, and port P1, P2 are its output port; Input port S1, S2 are connected with port S1, the S2 of AC power supplies respectively, output port P1, P2 respectively with A.C. contactor in A1, the A2 end of magnet exciting coil be connected;
The structure of described four port extra cells is:
(a), the positive pole of port S1, ambipolar transient voltage restraining diode, storage capacitor, rectifier diode, the negative pole of rectifier diode, port S2 are in turn connected into series circuit; Draw port P1 from the junction of ambipolar transient voltage restraining diode and storage capacitor again, draw port P2 from the junction of the positive pole of storage capacitor and rectifier diode; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port;
Perhaps be: (b), port S1, the negative pole of rectifier diode, the positive pole of rectifier diode, storage capacitor, ambipolar transient voltage restraining diode, port S2 be in turn connected into series circuit; Draw port P1 from the positive pole of rectifier diode and the junction of storage capacitor again, draw port P2 from the junction of storage capacitor and ambipolar transient voltage restraining diode; Port S1, S2 are the input port of described four port extra cells, and port P1, port P2 then are its output port;
Perhaps be: (c), port S1, the positive pole of mono-polar transient voltage restraining diode, the negative pole of mono-polar transient voltage restraining diode, storage capacitor, the negative pole of rectifier diode, the positive pole of rectifier diode, port S2 be in turn connected into series circuit; Draw port P1 from the negative pole of mono-polar transient voltage restraining diode and the junction of storage capacitor again, draw port P2 from the junction of the negative pole of storage capacitor and rectifier diode; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port;
Perhaps be: (d), port S1 end, the negative pole of rectifier diode, the positive pole of rectifier diode, ambipolar transient voltage restraining diode, storage capacitor, port S2 be in turn connected into series circuit; Draw port P1 from the junction of ambipolar transient voltage restraining diode and storage capacitor again, port P2 then is connected with port S2; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port;
Perhaps be: (e), port S1, the negative pole of mono-polar transient voltage restraining diode, the positive pole of mono-polar transient voltage restraining diode, the positive pole of rectifier diode, the negative pole of rectifier diode, storage capacitor, port S2 be in turn connected into series circuit; Draw port P1 from the junction of the negative pole of storage capacitor and rectifier diode again, port P2 then is connected with port S2; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port;
Perhaps be: (f), port S1, storage capacitor, the negative pole of rectifier diode, the positive pole of rectifier diode, ambipolar transient voltage restraining diode, port S2 be in turn connected into series circuit; Draw port P2 from the junction of the negative pole of storage capacitor and rectifier diode again, port P1 then is connected with port S1; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port;
Perhaps be: (g), port S1, storage capacitor, the negative pole of mono-polar transient voltage restraining diode, the positive pole of mono-polar transient voltage restraining diode, the positive pole of rectifier diode, the negative pole of rectifier diode, port S2 be in turn connected into series circuit; Draw port P2 from the junction of the negative pole of storage capacitor and mono-polar transient voltage restraining diode again, port P1 then is connected with port S1; Port S1, S2 are the input port of described four port extra cells, and port P1, P2 then are its output port.
Multiple " the four port extra cells " formed with said method has following common trait: all draw from an end of storage capacitor by composition, output P1 after transient voltage restraining diode, rectifier diode, these three element connected in series of storage capacitor, output P2 all draws from the other end of storage capacitor.
Use the utility model, can obtain following beneficial effect:
1, inexpensive.Be used to improve " extra cell " of conventional AC contactor performance in the utility model, three electronic components are only arranged, for electricity-saving type A.C. contactor large tracts of land is promoted the condition of having created;
2, thing is beautiful.In above-mentioned three electronic components; The ambipolar transient voltage restraining diode (or mono-polar transient voltage restraining diode) and the volume of rectifier diode are all very little; Can they be integrated into the inside of conventional AC contactor, manufacture the electricity-saving type A.C. contactor incorporate, that outward appearance is pleasing.
3, reliable.The reliability of electronic product and used number of electric parts are inversely proportional to, and price is directly proportional with used number of electric parts.Used electronic device is many, and electronic circuit is complicated, just means that reliability is low, price is high.The used electronic device of the utility model is few, and therefore, not only at the bottom of the cost, and reliability is high;
4, noise elimination.Conventional AC contactor noise height has been undisputable fact, and personnel have greatly reached nothing to be surprised at, the stage of facing the fearful with no fears to conventional AC contactor noise in the industry.The utility model can be accomplished noise elimination, even in the dead of night, also can't hear noise;
5, lengthen the life.Traditional CJX2 A.C. contactor, a CJX2 A.C. contactor of transforming with " extra cell " of the utility model are that the former had surpassed 60 ° of C at the temperature on surface after the same place of 25 ° of C was moved 24 hours simultaneously in room temperature; The latter, the temperature on surface still is a room temperature.Temperature rise is the formidable enemy of electronics, electric equipment products, temperature rise, and the useful life of product is just short, on the contrary just can prolong useful life.Therefore, the utlity model has prolongation product " lengthening the life " function in useful life;
6, quick.The exciting current that flows at magnet exciting coil during the adhesive of conventional AC contactor is gradual simple sinusoidal alternating current, and the utility model adopts the pulse current of sudden change.Therefore, conventional AC contactor adhesive action is slow, sound is dull, sucting speed is slow, and the utility model adhesive action is strong and powerful, clear, more than the twice of sucting speed for the former.The advantage of the utility model quick pick-up can reduce the electric arc of contact, prevents that contact from burning inefficacy, to the protection contact, prolong the contactor life-span and have important effect.
7, economize on electricity.Temperature rise is low, is the visualize of economize on electricity; Measured result shows that also the electric energy of the utility model apparent power is greater than 85%.
Description of drawings
Attached drawings this as the part of the utility model so that understand, in the accompanying drawing:
Fig. 1 is the fundamental diagram of conventional AC contactor in the prior art;
Fig. 2 is the circuit theory diagrams of embodiment a;
Fig. 3 is the equivalent circuit theory figure of embodiment a;
Fig. 4 is the circuit theory diagrams of embodiment b;
Fig. 5 is the circuit theory diagrams of embodiment c;
Fig. 6 is the circuit theory diagrams of embodiment d;
Fig. 7 is the circuit theory diagrams of embodiment e;
Fig. 8 is the circuit theory diagrams of embodiment f;
Fig. 9 is the circuit theory diagrams of embodiment g;
Figure 10 is pulse charging current I in the embodiment a pulse current charge process
0Timing chart with AC power supplies instantaneous voltage u.
Embodiment
In the description hereinafter, a large amount of concrete details have been provided so that more thorough understanding of the invention is provided.Yet, it is obvious to the skilled person that the utility model can need not one or more these details and be able to enforcement.In other example,, describe for technical characterictics more well known in the art for fear of obscuring with the utility model.Below in conjunction with accompanying drawing, the execution mode of the utility model is described.
Fig. 2 is the circuit theory diagrams of embodiment a, and Fig. 3 is the equivalent circuit theory figure of embodiment a; Dashed rectangle 100 is the conventional AC contactor for the four port extra cells of the utility model, L among the figure magnet exciting coil, I
0Be pulse charging current.
The characteristic of present embodiment a is: the negative pole of positive pole-rectifier diode D of S1 end, ambipolar transient voltage restraining diode TVS, storage capacitor C, rectifier diode D, S2 end are in turn connected into series circuit; Draw P1 end again from the junction of ambipolar transient voltage restraining diode TVS and storage capacitor C, draw P2 from the junction of the positive pole of storage capacitor C and rectifier diode D and hold; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port;
In conjunction with Fig. 2-3, input S1, the S2 of extra cell 100 are connected with AC power supplies, and the output P1 end of extra cell 100 is connected with the A1 end of magnet exciting coil L, and the P2 end is connected with the A2 end of magnet exciting coil L.
Those skilled in the art will be appreciated that the A1 end of described magnet exciting coil L, A2 end can connect in reciprocity.
In conjunction with Fig. 2-3, Figure 10, hold the mathematic(al) representation of the AC power supplies of input to be from S1, S2:
u=U
msin(ωt＋φ)
In the following formula: u is the instantaneous value of AC power supplies, U
mFor AC power supplies amplitude, ω is the angular frequency of AC power supplies, φ is the initial phase angle of AC power supplies.
Be concise explanation, suppose initial phase angle φ=0 at present, then the expression formula of the instantaneous value u of AC power supplies is:
u=U
msinωt
Its waveform is shown in figure 10.
During t=0, AC power supplies is connected, at this moment, because before AC power supplies was connected, storage capacitor C and magnet exciting coil L discharge all finished, so the voltage U at magnet exciting coil L two ends
L=0.
In conjunction with Fig. 3, the voltage at ambipolar transient voltage restraining diode TVS two ends is:
U
T=u－U
L
Work as t=t
1The time, U
T=u
1-U
L=u
1-0=u
1=U
mSin ω
T1, if u
1=U
B(U
BPuncture voltage for ambipolar transient voltage restraining diode TVS) then: 0～t
1Time period in, U
T<u
B, ambipolar transient voltage restraining diode TVS ends, and its equivalence is open circuit, so the pulse charging current I that driven by AC power supplies
0=0, the exciting current I among Fig. 3
L=0, among Fig. 1: the moving iron core M in the contactor, not adhesive of static iron core G, promptly contactor is not worked.
T=t
1The time, u
1=U
B, ambipolar transient voltage restraining diode TVS punctures, and is short circuit, u
1Be applied directly between two the output P1 and P2 of extra cell 100, at this moment:
1, rectifier diode D is because of the forward bias conducting;
2, combination Fig. 1: before the iron core adhesive, owing to have one section air gap between moving iron core M and the static iron core G, the magnetic resistance of magnetic circuit is bigger, and therefore, this moment, the inductance value of magnet exciting coil L was very little, was about one of two percentages of iron core adhesive inductance value afterwards, and it is at voltage u
1Effect under, produced bigger exciting current I
L, moving iron core M overcomes resistance and the powerful adhesive of back-moving spring F under the effect of magnetic force;
3, pulse charging current I
0Simultaneously storage capacitor C is charged;
4, combine Figure 10, in the moment that ambipolar transient voltage restraining diode TVS punctures, because the pulse charging current I of storage capacitor C
C1, exciting current I
LAll bigger, therefore, just produced pulse charging current I shown in Figure 10
0The steep rising edge of adhesive pulse 111.
T=t
aThe time, because the adhesive of iron core makes the hurried change of inductance value of magnet exciting coil L big, cause exciting current I
LHurried diminishing, pulse charging current I0 also drops to I thereupon hurriedly
0=I
a
At t
a～t
2Time period in, pulse charging current I
0Receive the influence of following two aspects:
1, the input voltage u that increases progressively in time;
2, along with electric current I
C1C charges constantly to storage capacitor, the voltage U at storage capacitor C two ends
LAlso increase progressively fast in time.
Receive the effect of above two aspects, the I0=Ia of pulse charging current I0 during by t=ta drops to t=t
2The time I
0=I
2,
In the time period of t2～t3, because input voltage u successively decreases in time, therefore, the I of pulse charging current I0 during by t=t2
0=I
2Drop to t=t fast
3The time I
0=I
3
At input voltage u=u
3And U
T=u
3-U
L<u
BCondition when setting up, ambipolar transient voltage restraining diode TVS ends, equivalence causes pulse charging current I for open circuit
0=0 and formed the trailing edge of adhesive pulse 111.
At t
3～t
41Time period in, input voltage u compares u
3Littler, U
T<u
BCondition more be prone to set up, ambipolar transient voltage restraining diode TVS still ends, therefore, pulse charging current I
0Still be I
0=0.
At t
41～t
42Time period in, AC power supplies is that S2 end high level, S1 hold low level negative half period, diode D ends, pulse charging current I
0Must be I
0=0.
Analyze so far, can do following brief summary in conjunction with Figure 10:
1, at t=t
1The time, ambipolar transient voltage restraining diode TVS punctures conducting, and iron core begins adhesive, at t=t
aThe time, the iron core adhesive finishes;
2, after the iron core adhesive, AC power supplies is through pulse charging current I
0Continuation is to storage capacitor C, magnet exciting coil L charging, until t=t
3The time, ambipolar transient voltage restraining diode TVS turn-offs, and charging finishes.
Ambipolar transient voltage restraining diode TVS turn-offs, pulse charging current I
0=0, after charging finished, A.C. contactor relied on storage capacitor C and the stored electric energy of magnet exciting coil L to keep iron core sticking state, and its process is:
1, combines Fig. 3, at t=t
3, ambipolar transient voltage restraining diode TVS shutdown moment because the electric current in the inductance can not suddenly change so exciting current I
LTo continue circulation;
2, storage capacitor C is through magnet exciting coil L discharge, its discharging current I
C2With exciting current I
LDirection-cause, the two keeps complementation each other;
3, as long as select the suitable capacitance of storage capacitor C, its inductance with magnet exciting coil L matches, and just can obtain sufficiently long LC time constant (time constant) T, makes exciting current I
LAt pulse charging current I
0Still have current strength enough, that can keep the iron core sticking in=0 time period.
In conjunction with Figure 10, along with the process of discharge, the voltage U L at storage capacitor C two ends will descend.At t=t
5Constantly, input voltage u=u
5, U
T=u
5-U
L>U
BCondition set up once more, ambipolar transient voltage restraining diode TVS punctures once more and is short circuit, pulse charging current I
0Be storage capacitor C and magnet exciting coil L charging makeup energy once more.At this t=t
5Constantly, because the voltage U at storage capacitor C two ends
LBe consumed and reduce to than low value, therefore, pulse charging current I
0=I
5With bigger value is storage capacitor C and magnet exciting coil L charging makeup energy, thereby forms the precipitous rising edge of " complementary energy pulse 112 ".
1, ambipolar transient voltage restraining diode TVS punctures conducting moment, and storage capacitor C is different with the state of magnet exciting coil L, the former, storage capacitor C and magnet exciting coil L discharge all finish, voltage U
L=0; The latter, storage capacitor C and magnet exciting coil L remain partly energy, U
L≠ 0.Among Figure 10, input voltage u
5With u
1Difference be exactly t=t
5Moment voltage U
LValue, this U
LValue also be that present embodiment can be at t=t
5The reason that still can keep iron core " sticking " state constantly;
2, ambipolar transient voltage restraining diode TVS punctures conducting moment, and the inductance value of magnet exciting coil L is different, the former, iron core is adhesive not, and the inductance value of magnet exciting coil L is little; The latter, iron core is adhesive, and the inductance value of magnet exciting coil L is about the former 200 times.
The above-mentioned course of work of cumulated volume embodiment combines Fig. 2 again, can draw the following characteristic of present embodiment:
1, rectifier diode D is a half-wave voltage with the all-wave voltage commutation of AC power supplies input;
2, ambipolar transient voltage restraining diode TVS is shaped as pulse charging current I with described half-wave voltage
0, this pulse charging current I
0Impulse waveform in the adhesive stage is that width is single " the adhesive pulse 111 " of Q1; In the sticking stage is that width is that Q2, repetition rate are 50 or the impulse train of 60Hz a plurality of " sticking pulses 112 ";
3, as described pulse charging current I
0During arrival, described storage capacitor C charging energy storage; As described pulse charging current I
0When ending, described storage capacitor C releases ability to described magnet exciting coil L discharge.
Because three elements: rectifier diode D, ambipolar transient voltage restraining diode TVS, storage capacitor C dexterously, harmoniously work make present embodiment possess two big functions of " economize on electricity ", " noise elimination ".
The check analysis of present embodiment a and conventional AC contactor:
One, adhesive
1, present embodiment has selected to have the ambipolar transient voltage restraining diode TVS of suitable puncture voltage UB, makes t=t
1Constantly, promptly ambipolar transient voltage restraining diode TVS puncture, input voltage u
1The magnetic force enough high, that magnet exciting coil L produces enough by force, when being enough to forcefully apace pull-core, the present embodiment adhesive of just switching on, otherwise wait for regard to refusal work rises to u > up to the value of input voltage; U
BThe time pull-core fiercely.
Before state, this characteristic of present embodiment is epochmaking.The insider is all known: the iron core adhesive is more simply quick more, and contact draws the time of arc discharge possibility just shorter, that contact is burnt just more little, and the useful life of A.C. contactor is just permanent more.This characteristic shows precious especially to high-power, higher-priced A.C. contactor.
Say strictly that 2, the pick-up voltage of present embodiment and conventional AC contactor all is at random, it is different and different to connect interchange instantaneous value constantly with AC power supplies.Before state, the advantage of present embodiment is: the AC power supplies to connecting at random has the function of automatic discriminating: as the instantaneous value u=U of AC power supplies
mSin (ω t+ φ)<u
BThe time, the voltage U of its output
L=0; Instantaneous value u=U when AC power supplies
mSin (ω t+ φ)>=U
BThe time, the voltage U of its output
L=u, in other words, no matter when AC power supplies is connected, the pick-up voltage of present embodiment all>=U
B
The conventional AC contactor is quite different, and its AC power supplies to connection does not at random have the function of discriminating, entirely with " fortune ".Lucky, AC power supplies is at u=U
mSin (ω t+ φ)=U
mIn time, connect, then adhesive forcefully; Most time then is " unlucky ".If being used to overcome the minimum exciting voltage (being minimum pick-up voltage) of back-moving spring elastic force is u=U
mSin (ω t+ φ)=u
0Then:
(1), if AC power supplies at u=u
0In time, connect, and it is with regard to adhesive reluctantly and feebly;
(2), if AC power supplies at u<u
0In time, connect, and it is with regard to power consumption in vain and can not adhesive, and the instantaneous value of power consumption always to AC power supplies rises to u=u
0The time just adhesive reluctantly and feebly.
That the contact of Here it is the especially high-power higher-priced conventional AC contactor of conventional AC contactor often burns out is therefore former-, also be that the power consumption of conventional AC contactor is high, one of reason of temperature rise.
Two, noise
1, the conventional AC contactor is in the sticking stage, is input to AC power supplies in the magnet exciting coil when " zero passage " (AC power supplies by positive half cycle to negative half period or negative half period " zero crossing " to positive half cycle transition), near the instantaneous voltage u zero point<u
0(the preceding u that stated
0For being used to overcome the minimum excitation voltage of back-moving spring elastic force); And the electric energy that magnet exciting coil stores exhausts, during the exciting current commutation; Magnetic force is less than the elastic force of back-moving spring; Moving iron core will leave static iron core, but that it has just left is very little-and during segment distance Δ L, the instantaneous value u of AC power supplies has risen to u>u
0So, the moving iron core that leaves again by magnetic force retract, the adhesive again of dynamic and static iron core.In this process, the silicon steel sheet in the dynamic and static iron core can produce the mechanical vibration noise that frequency is 100Hz (50Hz alternating current) or 120Hz (60Hz alternating current).
Present embodiment is a DC operation, does not have above-mentioned noise, and the parameter of element selects to guarantee that again it has sufficiently long LC time constant T and can guarantee its stably " sticking " that therefore, present embodiment has the premium properties of " noise elimination ".
Three, power consumption
1, the conventional AC contactor is alternate current operation, has stagnate magnetic loss, eddy current loss; Present embodiment is a DC operation, does not have the magnetic loss of stagnating, eddy current loss.
2, all to switch in the full-time territory of AC power supplies be AC all-wave voltage energising to the conventional AC contactor; Present embodiment then does
(1), precedingly state, rectifier diode D is a half-wave voltage with the AC power supplies rectification of all-wave.In the present embodiment, at the negative half period of AC power supplies all by no power (only this measure, present embodiment are beyond all doubtly than conventional AC contactor power saving 50 ℅);
(2), combine Figure 10: at the positive half cycle of AC power supplies, " the adhesive pulse 111 " of present embodiment and the angle of flow Q1 of " complementary energy pulse 112 ", Q2 make present embodiment more advance-go on foot the ground power saving all less than 180 °;
3, the magnet exciting coil of conventional AC contactor is a perceptual device, and power factor (PF) is low, and additional line loss is arranged.The time domain of present embodiment outside the angle of flow; Ambipolar transient voltage restraining diode TVS all ends; During storage capacitor C and magnet exciting coil L charging the energy of gained entirely by " lock " in inside; And noenergy exchange between AC power supplies, power factor (PF) → 1 does not exist because of the low and additional line loss of power factor (PF).
Fig. 4 is the circuit theory diagrams of embodiment b, it is characterized in that: the positive pole of negative pole-rectifier diode D of S1 end, rectifier diode D, storage capacitor C, ambipolar transient voltage restraining diode TVS, S2 end are in turn connected into series circuit; Draw the P1 end from the positive pole of rectifier diode D and the junction of storage capacitor C again, draw the P2 end from the junction of storage capacitor C and ambipolar transient voltage restraining diode TVS; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port.
Those skilled in the art is not difficult to reach a conclusion after analyzing: the operation principle of present embodiment b, the course of work are identical with embodiment a, and different has:
Rectifier diode D moves to the input S1 end of AC power supplies, and its negative pole is connected with the S1 end.After having done this change, the positive half cycle that present embodiment b becomes AC power supplies ends, the pattern of the controlled work of negative half period; Pulse charging current I
0Direction also correspondingly become with embodiment a in I
0On the contrary.
Fig. 5 is the circuit theory diagrams of embodiment c, it is characterized in that: the positive pole of negative pole-rectifier diode D of the negative pole of positive pole-mono-polar transient voltage restraining diode TVS1 of S1 end, mono-polar transient voltage restraining diode TVS1, storage capacitor C, rectifier diode D, S2 end are in turn connected into series circuit; Draw the P1 end again from the junction of the negative pole of mono-polar transient voltage restraining diode TVS1 and storage capacitor C, draw P2 from the junction of the negative pole of storage capacitor C and rectifier diode D and hold; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port;
The operation principle of present embodiment c, the course of work are identical with embodiment a, and different has:
1, replaces ambipolar transient voltage restraining diode TVS with mono-polar transient voltage restraining diode TVS1;
2, rectifier diode D moves to the output P2 end of extra cell 100, and its negative pole is connected with the P2 end.Because mono-polar transient voltage restraining diode TVS1, rectifier diode D, storage capacitor C connect; Again because the utility model uses TVS1 and D as switching device; So after doing this change, the operation principle of present embodiment c, the course of work are still identical with embodiment a;
Fig. 6 is the circuit theory diagrams of embodiment d, it is characterized in that: the positive pole of negative pole-rectifier diode D of S1 end, rectifier diode D, ambipolar transient voltage restraining diode TVS, storage capacitor C, S2 end are in turn connected into series circuit; Draw the P1 end again from the junction of ambipolar transient voltage restraining diode TVS and storage capacitor C, the P2 end then is connected with the S2 end; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port;
The operation principle of present embodiment d, the course of work are identical with embodiment a, and different has:
1, variation has been done in the position of rectifier diode D in circuit, and it is moved to input S1 end, and its negative pole is connected with the S1 end.After having done this change, the positive half cycle that present embodiment d becomes AC power supplies ends, the pattern of the controlled work of negative half period; Pulse charging current I
0Direction also correspondingly become with embodiment a in I
0On the contrary.
2, the P2 end then is connected-rises with the S2 end.Do this change, can make things convenient for the integrated of described four port extra cells 100.
Fig. 7 is the circuit theory diagrams of embodiment e, it is characterized in that: negative pole-positive pole of mono-polar transient voltage restraining diode TVS1 of S1 end, mono-polar transient voltage restraining diode TVS1, the negative pole of positive pole-rectifier diode D of rectifier diode D, storage capacitor C, S2 end are in turn connected into series circuit; Draw the P1 end again from the junction of the negative pole of storage capacitor C and rectifier diode D, the P2 end then is connected with the S2 end; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port;
The operation principle of present embodiment e, the course of work are identical with embodiment a.Different has: the P2 end is connected with the S2 end, and making between described four port extra cells 100 and the conventional AC contactor has had " common wire ", is convenient to the technological transformation conventional AC contactor with the utility model like this.
Fig. 8 is the circuit theory diagrams of embodiment f, it is characterized in that: the positive pole of negative pole-rectifier diode D of S1 end, storage capacitor C, rectifier diode D, ambipolar transient voltage restraining diode TVS, S2 end are in turn connected into series circuit; Draw the P2 end again from the junction of the negative pole of storage capacitor C and rectifier diode D, the P1 end then is connected with the S1 end; S1 end, S2 end are the input port of described four port extra cells, and P1 end, P2 end then are its output port;
The operation principle of present embodiment f, the course of work are identical with embodiment a.Different has:
The P1 end is held to become directly with S1 and is connected;
2, the present embodiment f positive half cycle that becomes AC power supplies ends the pattern of the controlled work of negative half period; Pulse charging current I
0Direction also correspondingly become with embodiment a in I
0On the contrary.
Fig. 9 is the circuit theory diagrams of embodiment g, it is characterized in that: the negative pole of the negative pole of S1 end, storage capacitor C, the mono-polar transient voltage restraining diode TVS1-positive pole of mono-polar transient voltage restraining diode TVS1, positive pole-rectifier diode D of rectifier diode D, S2 end are in turn connected into series circuit; Draw the P2 end again from the junction of the negative pole of storage capacitor C and mono-polar transient voltage restraining diode TVS1, the P1 end then is connected with the S1 end; S1 end, S2 end are the input port of described four port extra cells 100, and P1 end, P2 end then are its output port;
It will be apparent to those skilled in the art: compare with embodiment a, though the position of components of present embodiment g has been done change, its operation principle, the course of work are still identical with embodiment a.
Anatomize the circuit theory diagrams of above embodiment, can draw to draw a conclusion:
Described mono-polar transient voltage restraining diode TVS1 or ambipolar transient voltage restraining diode TVS can substitute with piezo-resistance; The positive and negative polarity that only it is also noted that element then also can substitute with voltage stabilizing didoe.
The utility model is illustrated through the foregoing description, but should be understood that, the foregoing description just is used for for example and illustrative purposes, but not is intended to the utility model is limited in the described scope of embodiments.It will be understood by those skilled in the art that in addition; The utility model is not limited to the foregoing description; Instruction according to the utility model can also be made more kinds of variants and modifications, and these variants and modifications all drop in the utility model scope required for protection.The protection range of the utility model is defined by appended claims book and equivalent scope thereof.
Claims (5)
1. the A.C. contactor of the noise elimination that economizes on electricity comprises four port extra cells and A.C. contactor two partly, and said A.C. contactor is made up of moving iron core, static iron core, magnet exciting coil, back-moving spring, break contact, make contact, it is characterized in that:
Described four port extra cells have S1, S2, P1, four ports of P2, and port S1, S2 are its input port, and port P1, P2 are its output port; Input port S1, S2 are connected with AC power supplies, output port P1, P2 respectively with A.C. contactor in A1, the A2 end of magnet exciting coil be connected;
The structure of described four port extra cells is: the negative pole of port S1, mono-polar transient voltage restraining diode, the positive pole of mono-polar transient voltage restraining diode, the positive pole of rectifier diode, the negative pole of rectifier diode, storage capacitor, port S2 are in turn connected into series circuit; Draw port P1 from the junction of the negative pole of storage capacitor and rectifier diode again, port P2 then is connected with port S2.
2. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: rectifier diode (D) is a half-wave voltage with the all-wave voltage commutation of AC power supplies input.
3. the A.C. contactor of economize on electricity noise elimination as claimed in claim 2 is characterized in that: ambipolar transient voltage restraining diode (TVS) is shaped as pulse charging current (I with described half-wave voltage
0), this pulse charging current (I
0) frequency be 50 or 60Hz.
4. the A.C. contactor of economize on electricity noise elimination as claimed in claim 3 is characterized in that: as described pulse charging current (I
0) when arriving, described storage capacitor (C) charging energy storage; As described pulse charging current (I
0) when ending, described storage capacitor (C) discharges to described magnet exciting coil (L) and releases ability.
5. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: described ambipolar transient voltage restraining diode (TVS) can use piezo-resistance, mono-polar transient voltage restraining diode or voltage stabilizing didoe thrin to substitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200418589U CN202564136U (en) | 2012-02-10 | 2012-02-10 | Power-saving and silent alternating-current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200418589U CN202564136U (en) | 2012-02-10 | 2012-02-10 | Power-saving and silent alternating-current contactor |
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| Publication Number | Publication Date |
|---|---|
| CN202564136U true CN202564136U (en) | 2012-11-28 |
Family
ID=47213764
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|---|---|---|---|
| CN2012200418589U Expired - Fee Related CN202564136U (en) | 2012-02-10 | 2012-02-10 | Power-saving and silent alternating-current contactor |
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| Country | Link |
|---|---|
| CN (1) | CN202564136U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391651A (en) * | 2019-07-15 | 2019-10-29 | 韶关高尔德防雷科技有限公司 | A kind of discharge tube follow current interrupt device |
-
2012
- 2012-02-10 CN CN2012200418589U patent/CN202564136U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391651A (en) * | 2019-07-15 | 2019-10-29 | 韶关高尔德防雷科技有限公司 | A kind of discharge tube follow current interrupt device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20150210 |
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| EXPY | Termination of patent right or utility model |