CN202678219U - Alternating current contactor capable of saving electricity and silencing - Google Patents
Alternating current contactor capable of saving electricity and silencing Download PDFInfo
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- CN202678219U CN202678219U CN 201220041853 CN201220041853U CN202678219U CN 202678219 U CN202678219 U CN 202678219U CN 201220041853 CN201220041853 CN 201220041853 CN 201220041853 U CN201220041853 U CN 201220041853U CN 202678219 U CN202678219 U CN 202678219U
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Abstract
An alternating current contactor capable of saving electricity and silencing comprises a four-port additional unit and an alternating current contactor. The four-port additional unit is composed of a transient voltage suppression diode, an energy-storage capacitor and a rectifying diode, and serves as a four-port network. An input port is connected with alternating current (AC) voltage, and an output port is connected with a magnet exciting coil in the alternating current contactor The alternating current contactor capable of saving the electricity and silencing only adopts three elements, and the alternating current contactor has four functions of energy saving, silencing, strong suction and stable holding. The four-port additional unit not only can be used for transforming a traditional alternating current contactor, but also can be integrated into an alternating current contactor which is manufactured at present to produce the novel alternating current contactor capable of saving the electricity and silencing.
Description
Technical field
The utility model relates to Low Voltage Electrical Apparatus, 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 very widely low-voltage electrical apparatus 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 comprised 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 is subjected to the effect of the magnetic force that magnet exciting coil produces and closed with static iron core, also thereupon closed with the make contact of moving iron core interlock, external circuit is just connected by this make contact; When the AC power supplies on the magnet exciting coil disconnected, moving iron core loss of excitation also was subjected to 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 mentioned above, the course of work of this traditional A.C. contactor can be divided into " adhesive ", " sticking ", "off" 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, disconnect: magnet exciting coil disconnects AC power supplies, and dynamic and static iron core separates, make contact resets disconnection.
Therefore traditional A.C. contactor exists following critical defect owing to all passing to alternating current work in adhesive and the sticking stage magnet exciting coil:
1, heating: in adhesive and sticking stage, owing to passing to alternating voltage (being AC power supplies) in the magnet exciting coil, therefore, will produce inevitably stagnant magnetic loss, eddy current loss in the dynamic and static iron core 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, and magnet exciting coil is more easily burnt.
2, power consumption: the energy of traditional A.C. contactor heating is inputted 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, at every turn " zero passage " (AC power supplies by just half circumferentially negative half period or negative half period to " zero crossing " of positive half cycle transition) time, electromagnetic attraction drastic change, can make silicon steel sheet in the dynamic and static iron core produce frequency is the 100Hz(50Hz alternating current) or the 120Hz(60Hz alternating current) mechanical vibration noise.
4, power factor (PF) (Power factor) is low.
For 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 " be used to improving traditional A.C. contactor performance.Chinese patent application number is that 97216246.1 " high-effect energy-saving ac contactor ", application number are that 94202133.9 " energy-saving alternating current contactor unit ", application number are that 201010144412.4 " a kind of energy saving ac contactor " discloses separately patent applicant's achievement in research.Above-mentioned prior art really for improving the performance of conventional AC contactor, has been made useful exploration and has been obtained certain achievement, but also has following defective, that is:
1, complex structure is difficult to carry out; Adopt monolithic processor controlled " economizer of AC. contactor " then to be subject to the electromagnetic interference of the 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 economizer of AC. contactor 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 only has hundreds of unit, and so expensive " QXJB type economizer of AC. contactor " 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 part is difficult to become one with A.C. contactor, and described economize on electricity control part 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 large to the stage comparable with the holding power of small-size contactor.
Have above defective just because of prior art, so following situation occurred: " China's electricity-saving type A.C. contactor has had certain market at present, but universal not enough, and traditional A.C. contactor uses the user at present and occupies an leading position.Main cause is that the power-saving contactor price is more expensive, and the user can't accept on disposable input, awaits country and strengthens the policy dynamics in the popularization of energy-saving type contactor, promotes the extensive use of energy-saving type contactor ".
For the present situation of prior art, the utility model want Da to target be:
1, electronic circuit of design simple, used device contactor power saving few, that price is tried one's best honest and clean special-purpose " extra cell " of trying one's best as far as possible;
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 " integrated novel " A.C. contactor of economize on electricity noise elimination ".
Thereby there is the demand that overcomes defects 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 parts, described A.C. contactor is comprised 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 magnet exciting coil A1, A2 the end be connected;
The structure of described four port extra cells is:
(a), the negative pole of the positive pole of port S1, ambipolar transient voltage suppressor diode, storage capacitor, rectifier diode, rectifier diode, port S2 are in turn connected into series circuit; Draw port P1 from the junction of ambipolar transient voltage suppressor 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 suppressor 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 suppressor 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 monopole type transient voltage suppressor diode, the negative pole of monopole type transient voltage suppressor 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 monopole type transient voltage suppressor 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 suppressor diode, storage capacitor, port S2 be in turn connected into series circuit; Draw port P1 from the junction of ambipolar transient voltage suppressor 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 monopole type transient voltage suppressor diode, the positive pole of monopole type transient voltage suppressor 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 suppressor 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 monopole type transient voltage suppressor diode, the positive pole of monopole type transient voltage suppressor 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 monopole type transient voltage suppressor 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 " that form with said method has following common trait: all draw from an end of storage capacitor by composition, output P1 after transient voltage suppressor diode, rectifier diode, these three element series connection 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.For improvement of " extra cell " of conventional AC contactor performance, three electronic components are only arranged in the utility model, for electricity-saving type A.C. contactor spread has been created condition;
2, thing is beautiful.In above-mentioned three electronic components, ambipolar transient voltage suppressor diode (or monopole type transient voltage suppressor diode) and the volume of rectifier diode are all very little, they can be integrated into the inside of conventional AC contactor, manufacture the electricity-saving type A.C. contactor integrated, that outward appearance is pleasing.
3, reliable.The quantity of the reliability of electronic product and used electronic device is inversely proportional to, and price is directly proportional with the quantity of used electronic device.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 industry Inner personnel have greatly reached nothing to be surprised at, the stage of facing the fearful with no fears to conventional AC contactor noise.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 present utility model are that the temperature on the former surface had surpassed 60 ° of C after the same place of 25 ° of C was moved 24 hours simultaneously in room temperature; The latter, the temperature on surface still is 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 also shows, the electric energy of the utility model apparent power is greater than 85%.
Description of drawings
Following accompanying drawing this as a part of the present 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 following description, a large amount of concrete details have been provided in order to 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 implemented.In other example, for fear of obscuring with the utility model, be not described for technical characterictics more well known in the art.Below in conjunction with accompanying drawing, execution mode of the present 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 magnet exciting coil, the I of conventional AC contactor for four port extra cells of the present utility model, L among the figure
0Be pulse charging current.
The feature of the present embodiment a is: the negative pole of the positive pole of S1 end, ambipolar transient voltage suppressor diode TVS, storage capacitor C, rectifier diode D-rectifier diode D, S2 end are in turn connected into series circuit; Draw again P1 end from the junction of ambipolar transient voltage suppressor 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, now suppose initial phase angle φ=0, then the expression formula of the instantaneous value u of AC power supplies is:
u=U
msinωt
Its waveform as 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, therefore the voltage U at magnet exciting coil L two ends
L=0.
In conjunction with Fig. 3, the voltage at ambipolar transient voltage suppressor 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
T1If, u
1=U
B(U
BPuncture voltage for ambipolar transient voltage suppressor diode TVS) then: 0～t
1Time period in, U
T＜U
B, ambipolar transient voltage suppressor diode TVS cut-off, its equivalence is open circuit, therefore the pulse charging current I that driven by AC power supplies
0Exciting current I among=0, Fig. 3
LAmong=0, Fig. 1: the moving iron core M in the contactor, not adhesive of static iron core G, namely contactor is not worked.
T=t
1The time, u
1=U
B, ambipolar transient voltage suppressor 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, in conjunction with Fig. 1: before the iron core adhesive, owing to having one section air gap between moving iron core M and the static iron core G, the magnetic resistance of magnetic circuit is larger, 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 larger exciting current I
L, moving iron core M overcomes the resistance of back-moving spring F and powerful adhesive under the effect of magnetic force;
3, pulse charging current I
0Simultaneously storage capacitor C is charged;
4, in conjunction with Figure 10, in the moment that ambipolar transient voltage suppressor diode TVS punctures, because the pulse charging current I of storage capacitor C
C1, exciting current I
LAll larger, 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 large, 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
0Be subjected to the impact 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.
Be subjected to 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,
Within 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
2Fast-descending is to t=t
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 suppressor diode TVS cut-off, 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
3Less, U
T＜U
BCondition more easily set up, ambipolar transient voltage suppressor 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 cut-off, 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 suppressor diode TVS punctures conducting, and iron core begins adhesive, at t=t
aThe time, the iron core adhesive is complete;
2, after the iron core adhesive, AC power supplies is by pulse charging current I
0Continuation is to storage capacitor C, magnet exciting coil L charging, until t=t
3The time, ambipolar transient voltage suppressor diode TVS turn-offs, and charging finishes.
Ambipolar transient voltage suppressor 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, in conjunction with Fig. 3, at t=t
3, ambipolar transient voltage suppressor 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 by 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
LU
BCondition again set up, ambipolar transient voltage suppressor diode TVS again punctures and is short circuit, pulse charging current I
0Be storage capacitor C and magnet exciting coil L charging makeup energy again.At this t=t
5Constantly, because the voltage U at storage capacitor C two ends
LBe consumed and be down to lower value, therefore, pulse charging current I
0=I
5Take larger value as storage capacitor C with magnet exciting coil L charging makeup energy, thereby form the precipitous rising edge of " complementary energy pulse 112 ".
Complementary energy pulse 112 is at t=t
5Each time period afterwards, pulse charging current I
0The course of work similar in the course of work of each corresponding time period to adhesive pulse 111, repeated description no longer here.
Adhesive pulse 111 is basic identical with the waveform of complementary energy pulse 112, and only pulse front edge is not identical, and the latter's upper punch of leaping high on the former is low, causes the reason of this difference to be:
1, ambipolar transient voltage suppressor 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 part 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 the present embodiment can be at t=t
5The reason that still can keep iron core " sticking " state constantly;
2, ambipolar transient voltage suppressor 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 again in conjunction with Fig. 2, can draw the following characteristics of the present embodiment:
1, rectifier diode D is half-wave voltage with the all-wave voltage commutation of AC power supplies input;
2, ambipolar transient voltage suppressor 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; Be that width is that Q2, repetition rate are 50 or the impulse train of 60Hz a plurality of " sticking pulses 112 " in the sticking stage;
3, as described pulse charging current I
0During arrival, described storage capacitor C charging energy-storing; As described pulse charging current I
0During cut-off, described storage capacitor C releases energy to described magnet exciting coil L discharge.
Because three elements: rectifier diode D, ambipolar transient voltage suppressor diode TVS, storage capacitor C dexterously, harmoniously work make the present embodiment possess two large functions of " economize on electricity ", " noise elimination ".
The check analysis of the present embodiment a and conventional AC contactor:
One, adhesive
1, the present embodiment has selected to have the ambipolar transient voltage suppressor diode TVS of suitable puncture voltage UB, makes t=t
1Constantly, namely ambipolar transient voltage suppressor diode TVS puncture, input voltage u
1Enough the magnetic force that produces of high, magnet exciting coil L enough by force, when being enough to forcefully rapidly pull-core, the present embodiment adhesive of just switching on, otherwise wait for regard to refusal work is until the value of input voltage rises to u〉U
BThe time pull-core fiercely.
Before state, this characteristic of the present embodiment is epochmaking.The insider is all known: the iron core adhesive is more clear-cut quicker, and the time that contact draws arc discharge, just possibility shorter, that contact is burnt was just less, and the useful life of A.C. contactor is just more permanent.This characteristic is especially aobvious precious to high-power, higher-priced A.C. contactor.
2, strictly say, the pick-up voltage of the present embodiment and conventional AC contactor all is random, connects interchange instantaneous value constantly with AC power supplies different and different.Before state, the advantage of the present embodiment is: the function that the AC power supplies of random connection is had 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, Change says it, and no matter when AC power supplies is connected, the pick-up voltage of the present embodiment all 〉=U
B
The conventional AC contactor is quite different, its to the AC power supplies of random connection without the function of differentiating, entirely with " fortune ".Lucky, AC power supplies is at u=U
mSin(ω t+ φ)=U
mIn time, connect, then forcefully adhesive; Most time then is " unlucky ".If being used for overcoming 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 reluctantly and feebly adhesive;
(2) if AC power supplies at u＜u
0In time, connect, and it is with regard in vain power consumption and can not adhesive, and always power consumption to the instantaneous value of AC power supplies rises to u=u
0The time just reluctantly and feebly adhesive.
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 the reason of temperature rise.
Two, noise
1, the conventional AC contactor is in the sticking stage, be input in the magnet exciting coil AC power supplies " zero passage " (AC power supplies by just half circumferentially negative half period or negative half period to " zero crossing " of positive half cycle transition) time, near the instantaneous voltage u＜u zero point
0(the front u that stated
0For being used for overcoming the minimum exciting voltage of back-moving spring elastic force), and the electric energy that magnet exciting coil stores exhaust, encourage magnetic electricity stream Change to the time, 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 again adhesive of dynamic and static iron core.In this process, it is the 100Hz(50Hz alternating current that the silicon steel sheet in the dynamic and static iron core can produce frequency) or the 120Hz(60Hz alternating current) mechanical vibration noise.
The present embodiment is DC operation, does not have above-mentioned noise, and the parameter selection of element guarantees that again it has sufficiently long LC time constant T and can guarantee its stably " sticking ", and therefore, the 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; The present embodiment is DC operation, without magnetic loss, the eddy current loss of stagnating.
2, all to switch in the full-time territory of AC power supplies be AC all-wave voltage energising to the conventional AC contactor; The present embodiment then is
(1), frontly state, rectifier diode D is half-wave voltage with the AC power supplies rectification of all-wave.In the present embodiment, all end no power (only this measure, the present embodiment are beyond all doubtly than conventional AC contactor power saving 50 ℅) at the negative half period of AC power supplies;
(2), in conjunction with Figure 10: at the positive half cycle of AC power supplies, " the adhesive pulse 111 " of the present embodiment and angle of flow Q1, the Q2 of " complementary energy pulse 112 " make the 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 perceptual device, and power factor (PF) is low, and additional line loss is arranged.The time domain of the present embodiment outside the angle of flow, ambipolar transient voltage suppressor 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 Jiao Change 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 the negative pole of S1 end, rectifier diode D-rectifier diode D, storage capacitor C, ambipolar transient voltage suppressor 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 suppressor 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 by analysis after, be not difficult to reach a conclusion: the operation principle of the present embodiment b, the course of work are identical with embodiment a, and difference 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 present embodiment b becomes the positive half cycle cut-off of AC power supplies, 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 the positive pole of S1 end, the monopole type transient voltage suppressor diode TVS1-negative pole of monopole type transient voltage suppressor diode TVS1, the negative pole of storage capacitor C, rectifier diode D-rectifier diode D, S2 end are in turn connected into series circuit; Draw again the P1 end from the junction of the negative pole of monopole type transient voltage suppressor 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 the present embodiment c, the course of work are identical with embodiment a, and difference has:
1, replaces ambipolar transient voltage suppressor diode TVS with monopole type transient voltage suppressor 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 monopole type transient voltage suppressor 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 the 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 negative pole of S1 end, the rectifier diode D-positive pole of rectifier diode D, ambipolar transient voltage suppressor diode TVS, storage capacitor C, S2 end are in turn connected into series circuit; Draw the P1 end from the junction of ambipolar transient voltage suppressor diode TVS and storage capacitor C, the P2 end then is connected with the S2 end again; 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 the present embodiment d, the course of work are identical with embodiment a, and difference 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 present embodiment d becomes the positive half cycle cut-off of AC power supplies, 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 to-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: the negative pole of the negative pole of S1 end, the monopole type transient voltage suppressor diode TVS1-positive pole of monopole type transient voltage suppressor diode TVS1, the positive pole of rectifier diode D-rectifier diode D, storage capacitor C, S2 end are in turn connected into series circuit; Draw the P1 end 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 again; 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 the present embodiment e, the course of work are identical with embodiment a.Difference 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 like this with technological transformation conventional AC contactor of the present utility model.
Fig. 8 is the circuit theory diagrams of embodiment f, it is characterized in that: the positive pole of the negative pole of S1 end, storage capacitor C, rectifier diode D-rectifier diode D, ambipolar transient voltage suppressor diode TVS, S2 end are in turn connected into series circuit; Draw the P2 end 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 again; 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 the present embodiment f, the course of work are identical with embodiment a.Difference has:
The P1 end is held to become directly with S1 and is connected;
2, the present embodiment f becomes the positive half cycle cut-off of AC power supplies, 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 monopole type transient voltage suppressor diode TVS1-positive pole of monopole type transient voltage suppressor diode TVS1, the positive pole of rectifier diode D-rectifier diode D, S2 end are in turn connected into series circuit; Draw the P2 end from the junction of the negative pole of storage capacitor C and monopole type transient voltage suppressor diode TVS1, the P1 end then is connected with the S1 end again; 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, although the position of components of the present embodiment g has been done change, its operation principle, the course of work are still identical with embodiment a.
Carefully analyze the circuit theory diagrams of above embodiment, can draw to draw a conclusion:
Described monopole type transient voltage suppressor diode TVS1 or ambipolar transient voltage suppressor 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 by above-described embodiment, but should be understood that, above-described embodiment just is used for for example and the purpose of explanation, 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 above-described embodiment; can also make more kinds of variants and modifications according to instruction of the present utility model, these variants and modifications all drop in the utility model scope required for protection.Protection range of the present utility model is defined by the appended claims 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 parts, and described A.C. contactor is comprised 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 magnet exciting coil A1, A2 the end be connected;
The structure of described four port extra cells is:
The positive pole of the negative pole of port S1, storage capacitor, monopole type transient voltage suppressor diode, the positive pole of monopole type transient voltage suppressor diode, rectifier diode, the negative pole of rectifier diode, port S2 are in turn connected into series circuit; Draw port P2 from the junction of the negative pole of storage capacitor and monopole type transient voltage suppressor diode again, port P1 then is connected with port S1.
2. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: rectifier diode (D) is 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, it is characterized in that: ambipolar transient voltage suppressor 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-storing; As described pulse charging current (I
0) when ending, described storage capacitor (C) discharges to described magnet exciting coil (L) and releases energy.
5. the A.C. contactor of economize on electricity noise elimination as claimed in claim 1 is characterized in that: described ambipolar transient voltage suppressor diode (TVS) can use piezo-resistance, monopole type transient voltage suppressor diode or voltage stabilizing didoe thrin to substitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220041853 CN202678219U (en) | 2012-02-10 | 2012-02-10 | Alternating current contactor capable of saving electricity and silencing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220041853 CN202678219U (en) | 2012-02-10 | 2012-02-10 | Alternating current contactor capable of saving electricity and silencing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678219U true CN202678219U (en) | 2013-01-16 |
Family
ID=47499103
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220041853 Expired - Fee Related CN202678219U (en) | 2012-02-10 | 2012-02-10 | Alternating current contactor capable of saving electricity and silencing |
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| Country | Link |
|---|---|
| CN (1) | CN202678219U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413725A (en) * | 2013-08-01 | 2013-11-27 | 宁波市镇海华泰电器厂 | Power-saving type alternating current contactor with power-saving unit |
-
2012
- 2012-02-10 CN CN 201220041853 patent/CN202678219U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413725A (en) * | 2013-08-01 | 2013-11-27 | 宁波市镇海华泰电器厂 | Power-saving type alternating current contactor with power-saving unit |
| CN103413725B (en) * | 2013-08-01 | 2015-10-28 | 国家电网公司 | Be provided with the electricity-saving type A.C. contactor of power save unit |
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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: 20130116 Termination date: 20150210 |
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| EXPY | Termination of patent right or utility model |